Attachment 357225 Details for Bug 192355 – First draft

[patch] First draft

bug-192355-20181213043708.patch (text/plain), 334.37 KB, created by Myles C. Maxfield on 2018-12-13 04:37:09 PST

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Creator: Myles C. Maxfield

Created: 2018-12-13 04:37:09 PST

Size: 334.37 KB

patch

obsolete

>Subversion Revision: 239149
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 1056f21cb57d27703f88d6c3353f3dcf973bfe79..fcd15096f2e2ff7632329f2dac5f9cb9d46c79e3 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,75 @@
>+2018-12-12  Myles C. Maxfield  <mmaxfield@apple.com>
>+
>+        [WHLSL] Add a handwritten parser
>+        https://bugs.webkit.org/show_bug.cgi?id=192355
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * Modules/webgpu/WHLSL/WHLSLASTEnumDef.cpp: Added.
>+        * Modules/webgpu/WHLSL/WHLSLASTEnumDef.h: Added.
>+        * Modules/webgpu/WHLSL/WHLSLASTFuncDef.cpp: Added.
>+        * Modules/webgpu/WHLSL/WHLSLASTFuncDef.h: Added.
>+        * Modules/webgpu/WHLSL/WHLSLASTNativeFuncDecl.cpp: Added.
>+        * Modules/webgpu/WHLSL/WHLSLASTNativeFuncDecl.h: Added.
>+        * Modules/webgpu/WHLSL/WHLSLASTNativeTypeDecl.cpp: Added.
>+        * Modules/webgpu/WHLSL/WHLSLASTNativeTypeDecl.h: Added.
>+        * Modules/webgpu/WHLSL/WHLSLASTStructDef.cpp: Added.
>+        * Modules/webgpu/WHLSL/WHLSLASTStructDef.h: Added.
>+        * Modules/webgpu/WHLSL/WHLSLASTType.cpp: Added.
>+        * Modules/webgpu/WHLSL/WHLSLASTType.h: Added.
>+        * Modules/webgpu/WHLSL/WHLSLASTTypeDef.cpp: Added.
>+        * Modules/webgpu/WHLSL/WHLSLASTTypeDef.h: Added.
>+        * Modules/webgpu/WHLSL/WHLSLASTVariableDecl.cpp: Added.
>+        * Modules/webgpu/WHLSL/WHLSLASTVariableDecl.h: Added.
>+        * Modules/webgpu/WHLSL/WHLSLLexer.cpp: Added.
>+        (WebCore::WHLSL::Lexer::consumeTokenFromStream):
>+        (WebCore::WHLSL::Lexer::skipWhitespaceAndComments):
>+        (WebCore::WHLSL::isWhitespace):
>+        (WebCore::WHLSL::isNewline):
>+        (WebCore::WHLSL::Lexer::skipWhitespace):
>+        (WebCore::WHLSL::Lexer::skipLineComment):
>+        (WebCore::WHLSL::Lexer::skipLongComment):
>+        (WebCore::WHLSL::Lexer::coreDecimalIntLiteral const):
>+        (WebCore::WHLSL::Lexer::decimalIntLiteral const):
>+        (WebCore::WHLSL::Lexer::decimalUintLiteral const):
>+        (WebCore::WHLSL::isHexadecimalCharacter):
>+        (WebCore::WHLSL::Lexer::coreHexadecimalIntLiteral const):
>+        (WebCore::WHLSL::Lexer::hexadecimalIntLiteral const):
>+        (WebCore::WHLSL::Lexer::hexadecimalUintLiteral const):
>+        (WebCore::WHLSL::Lexer::intLiteral const):
>+        (WebCore::WHLSL::Lexer::digit const):
>+        (WebCore::WHLSL::Lexer::digitStar const):
>+        (WebCore::WHLSL::Lexer::character const):
>+        (WebCore::WHLSL::Lexer::coreFloatLiteralType1 const):
>+        (WebCore::WHLSL::Lexer::coreFloatLiteral const):
>+        (WebCore::WHLSL::Lexer::floatLiteral const):
>+        (WebCore::WHLSL::Lexer::qualifier const):
>+        (WebCore::WHLSL::Lexer::semantic const):
>+        (WebCore::WHLSL::Lexer::numthreads const):
>+        (WebCore::WHLSL::Lexer::validIdentifier const):
>+        (WebCore::WHLSL::Lexer::identifier const):
>+        (WebCore::WHLSL::Lexer::operatorName const):
>+        * Modules/webgpu/WHLSL/WHLSLLexer.h: Added.
>+        (WebCore::WHLSL::Lexer::Lexer):
>+        (WebCore::WHLSL::Lexer::consumeToken):
>+        (WebCore::WHLSL::Lexer::unconsumeToken):
>+        (WebCore::WHLSL::Lexer::state const):
>+        (WebCore::WHLSL::Lexer::setState):
>+        (WebCore::WHLSL::Lexer::isFullyConsumed const):
>+        (WebCore::WHLSL::Lexer::string const):
>+        (WebCore::WHLSL::Lexer::anyCharacter const):
>+        * Modules/webgpu/WHLSL/WHLSLParser.cpp: Added.
>+        (WebCore::WHLSL::Parser::Parser):
>+        (WebCore::WHLSL::Parser::parse):
>+        (WebCore::WHLSL::Parser::parseType):
>+        * Modules/webgpu/WHLSL/WHLSLParser.h: Added.
>+        (WebCore::WHLSL::Parser::backtrackingScope):
>+        (WebCore::WHLSL::Parser::testScope):
>+        * Modules/webgpu/WHLSL/WHLSLProgram.cpp: Added.
>+        * Modules/webgpu/WHLSL/WHLSLProgram.h: Added.
>+        * Sources.txt:
>+        * WebCore.xcodeproj/project.pbxproj:
>+
> 2018-12-13  Ryosuke Niwa  <rniwa@webkit.org>
> 
>         Make TextInputController.legacyAttributedString take DOM nodes and offsets
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTAnonymousVariableDeclaration.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTAnonymousVariableDeclaration.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..fbb9fccc455f31cbf8eb33e47a185022664fda48
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTAnonymousVariableDeclaration.h
>@@ -0,0 +1,63 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTValue.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class AnonymousVariableDeclaration : public Value {
>+public:
>+    AnonymousVariableDeclaration(Lexer::Token&& origin)
>+        : m_origin(WTFMove(origin))
>+    {
>+    }
>+
>+    virtual ~AnonymousVariableDeclaration() = default;
>+
>+    AnonymousVariableDeclaration(const AnonymousVariableDeclaration&) = delete;
>+    AnonymousVariableDeclaration(AnonymousVariableDeclaration&&) = default;
>+
>+    Lexer::Token origin() const { return m_origin; }
>+
>+private:
>+    Lexer::Token m_origin;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTArrayReferenceType.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTArrayReferenceType.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..2397868353fe2d5a7725f3d9a9a9f638450ee5c2
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTArrayReferenceType.h
>@@ -0,0 +1,66 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTReferenceType.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class ArrayReferenceType : public ReferenceType {
>+public:
>+    ArrayReferenceType(Lexer::Token&& origin, String&& addressSpace, std::unique_ptr<Type>&& elementType)
>+        : ReferenceType(WTFMove(origin), WTFMove(addressSpace), WTFMove(elementType))
>+    {
>+    }
>+
>+    virtual ~ArrayReferenceType() = default;
>+
>+    ArrayReferenceType(const ArrayReferenceType&) = delete;
>+    ArrayReferenceType(ArrayReferenceType&&) = default;
>+
>+    std::unique_ptr<Type> clone() const override
>+    {
>+        return std::make_unique<ArrayReferenceType>(Lexer::Token(origin()), String(addressSpace()), elementType()->clone());
>+    }
>+
>+private:
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTArrayType.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTArrayType.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..bf388fb8f6b9a642eeb610f0d7637454abd606f1
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTArrayType.h
>@@ -0,0 +1,74 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTType.h"
>+#include "WHLSLASTTypeArgument.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class ArrayType : public Type {
>+public:
>+    ArrayType(Lexer::Token&& origin, std::unique_ptr<Type>&& elementType, unsigned numElements)
>+        : m_origin(WTFMove(origin))
>+        , m_elementType(WTFMove(elementType))
>+        , m_numElements(numElements)
>+    {
>+    }
>+
>+    virtual ~ArrayType() = default;
>+
>+    ArrayType(const ArrayType&) = delete;
>+    ArrayType(ArrayType&&) = default;
>+
>+    unsigned numElements() const { return m_numElements; }
>+
>+    std::unique_ptr<Type> clone() const override
>+    {
>+        return std::make_unique<ArrayType>(Lexer::Token(m_origin), m_elementType->clone(), m_numElements);
>+    }
>+
>+private:
>+    Lexer::Token m_origin;
>+    std::unique_ptr<Type> m_elementType;
>+    unsigned m_numElements;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTAssignmentExpression.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTAssignmentExpression.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..c66c6dc35ec3d39993bdb6eb1f33fb00b222d09c
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTAssignmentExpression.h
>@@ -0,0 +1,64 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class AssignmentExpression : public Expression {
>+public:
>+    AssignmentExpression(Lexer::Token&& origin, std::unique_ptr<Expression>&& left, std::unique_ptr<Expression>&& right)
>+        : Expression(WTFMove(origin))
>+        , m_left(WTFMove(left))
>+        , m_right(WTFMove(right))
>+    {
>+    }
>+
>+    virtual ~AssignmentExpression() = default;
>+
>+    AssignmentExpression(const AssignmentExpression&) = delete;
>+    AssignmentExpression(AssignmentExpression&&) = default;
>+
>+private:
>+    std::unique_ptr<Expression> m_left;
>+    std::unique_ptr<Expression> m_right;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBaseFunctionAttribute.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBaseFunctionAttribute.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..69c6511c82b14b49976d1e7bd2062d1fd0eec2fc
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBaseFunctionAttribute.h
>@@ -0,0 +1,61 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTNode.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class BaseFunctionAttribute : public Node {
>+public:
>+    BaseFunctionAttribute(Lexer::Token&& origin)
>+        : m_origin(WTFMove(origin))
>+    {
>+    }
>+
>+    virtual ~BaseFunctionAttribute() = default;
>+
>+    BaseFunctionAttribute(const BaseFunctionAttribute&) = delete;
>+    BaseFunctionAttribute(BaseFunctionAttribute&&) = default;
>+
>+private:
>+    Lexer::Token m_origin;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBaseSemantic.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBaseSemantic.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..44feceee9b7c003187838d258a78a15504f64de3
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBaseSemantic.h
>@@ -0,0 +1,61 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTNode.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class BaseSemantic : public Node {
>+public:
>+    BaseSemantic(Lexer::Token&& origin)
>+        : m_origin(WTFMove(origin))
>+    {
>+    }
>+
>+    virtual ~BaseSemantic() = default;
>+
>+    BaseSemantic(const BaseSemantic&) = delete;
>+    BaseSemantic(BaseSemantic&&) = default;
>+
>+private:
>+    Lexer::Token m_origin;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBlock.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBlock.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..8b73f7f04c4ec3461a18a04c82114a458d5f7267
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBlock.h
>@@ -0,0 +1,63 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTStatement.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/Vector.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class Block : public Statement {
>+public:
>+    Block(Lexer::Token&& origin, Vector<std::unique_ptr<Statement>>&& statements)
>+        : Statement(WTFMove(origin))
>+        , m_statements(WTFMove(statements))
>+    {
>+    }
>+
>+    virtual ~Block() = default;
>+
>+    Block(const Block&) = delete;
>+    Block(Block&&) = default;
>+
>+private:
>+    Vector<std::unique_ptr<Statement>> m_statements;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBooleanLiteral.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBooleanLiteral.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..0c3ba78652e1278524ee3699ac47e34e9b22ffb8
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBooleanLiteral.h
>@@ -0,0 +1,64 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class BooleanLiteral : public Expression {
>+public:
>+    BooleanLiteral(Lexer::Token&& origin, bool value)
>+        : Expression(WTFMove(origin))
>+        , m_value(value)
>+    {
>+    }
>+
>+    virtual ~BooleanLiteral() = default;
>+
>+    explicit BooleanLiteral(const BooleanLiteral&) = default;
>+    BooleanLiteral(BooleanLiteral&&) = default;
>+
>+    bool value() const { return m_value; }
>+
>+private:
>+    bool m_value;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBreak.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBreak.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..7c2b10ac72740b53181306006c023629bd88f2dd
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBreak.h
>@@ -0,0 +1,60 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTStatement.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class Break : public Statement {
>+public:
>+    Break(Lexer::Token&& origin)
>+        : Statement(WTFMove(origin))
>+    {
>+    }
>+
>+    virtual ~Break() = default;
>+
>+    Break(const Break&) = delete;
>+    Break(Break&&) = default;
>+
>+private:
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBuiltInSemantic.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBuiltInSemantic.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..ee4012b30427853bcccb265abeda75f1d5cec6de
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTBuiltInSemantic.h
>@@ -0,0 +1,83 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTBaseSemantic.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class BuiltInSemantic : public BaseSemantic {
>+public:
>+    enum class Variable {
>+        SVInstanceID,
>+        SVVertexID,
>+        PSize,
>+        SVPosition,
>+        SVIsFrontFace,
>+        SVSampleIndex,
>+        SVInnerCoverage,
>+        SVTarget,
>+        SVDepth,
>+        SVCoverage,
>+        SVDispatchThreadID,
>+        SVGroupID,
>+        SVGroupIndex,
>+        SVGroupThreadID
>+    };
>+
>+    BuiltInSemantic(Lexer::Token&& origin, Variable variable, std::optional<unsigned>&& targetIndex = std::nullopt)
>+        : BaseSemantic(WTFMove(origin))
>+        , m_variable(variable)
>+        , m_targetIndex(WTFMove(targetIndex))
>+    {
>+    }
>+
>+    virtual ~BuiltInSemantic() = default;
>+
>+    BuiltInSemantic(const BuiltInSemantic&) = delete;
>+    BuiltInSemantic(BuiltInSemantic&&) = default;
>+
>+    Variable variable() const { return m_variable; }
>+
>+private:
>+    Variable m_variable;
>+    std::optional<unsigned> m_targetIndex;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTCallExpression.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTCallExpression.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..68af89ead854b2d1533a7549ee4d2e27889f45d2
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTCallExpression.h
>@@ -0,0 +1,64 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class CallExpression : public Expression {
>+public:
>+    CallExpression(Lexer::Token&& origin, String&& name, Vector<std::unique_ptr<Expression>>&& arguments)
>+        : Expression(WTFMove(origin))
>+        , m_name(WTFMove(name))
>+        , m_arguments(WTFMove(arguments))
>+    {
>+    }
>+
>+    virtual ~CallExpression() = default;
>+
>+    CallExpression(const CallExpression&) = delete;
>+    CallExpression(CallExpression&&) = default;
>+
>+private:
>+    String m_name;
>+    Vector<std::unique_ptr<Expression>> m_arguments;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTCommaExpression.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTCommaExpression.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..77bf3dcf50b7356f8ab500cf3a2d63a53e47b314
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTCommaExpression.h
>@@ -0,0 +1,63 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/Vector.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class CommaExpression : public Expression {
>+public:
>+    CommaExpression(Lexer::Token&& origin, Vector<std::unique_ptr<Expression>>&& list)
>+        : Expression(WTFMove(origin))
>+        , m_list(WTFMove(list))
>+    {
>+    }
>+
>+    virtual ~CommaExpression() = default;
>+
>+    CommaExpression(const CommaExpression&) = delete;
>+    CommaExpression(CommaExpression&&) = default;
>+
>+private:
>+    Vector<std::unique_ptr<Expression>> m_list;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTConstantExpression.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTConstantExpression.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..8c7d7d060cd81ea92cb17c801a18d9c77389d9d0
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTConstantExpression.h
>@@ -0,0 +1,59 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTBooleanLiteral.h"
>+#include "WHLSLASTConstantExpressionEnumerationMemberReference.h"
>+#include "WHLSLASTFloatLiteral.h"
>+#include "WHLSLASTIntegerLiteral.h"
>+#include "WHLSLASTNullLiteral.h"
>+#include "WHLSLASTUnsignedIntegerLiteral.h"
>+#include <wtf/Variant.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+typedef Variant<
>+    IntegerLiteral,
>+    UnsignedIntegerLiteral,
>+    FloatLiteral,
>+    NullLiteral,
>+    BooleanLiteral,
>+    ConstantExpressionEnumerationMemberReference
>+    > ConstantExpression;
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTConstantExpressionEnumerationMemberReference.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTConstantExpressionEnumerationMemberReference.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..2c24a98b2cabb0f9ea85c0ba1e090a6608de824f
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTConstantExpressionEnumerationMemberReference.h
>@@ -0,0 +1,65 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLLexer.h"
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class ConstantExpressionEnumerationMemberReference : public Node {
>+public:
>+    ConstantExpressionEnumerationMemberReference(Lexer::Token&& origin, String&& left, String&& right)
>+        : m_origin(WTFMove(origin))
>+        , m_left(WTFMove(left))
>+        , m_right(WTFMove(right))
>+    {
>+    }
>+
>+    virtual ~ConstantExpressionEnumerationMemberReference() = default;
>+
>+    explicit ConstantExpressionEnumerationMemberReference(const ConstantExpressionEnumerationMemberReference&) = default;
>+    ConstantExpressionEnumerationMemberReference(ConstantExpressionEnumerationMemberReference&&) = default;
>+
>+private:
>+    Lexer::Token m_origin;
>+    String m_left;
>+    String m_right;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTContinue.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTContinue.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..1681024e813c53d0ad2583cb6fe3c24bf5bd260d
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTContinue.h
>@@ -0,0 +1,60 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTStatement.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class Continue : public Statement {
>+public:
>+    Continue(Lexer::Token&& origin)
>+        : Statement(WTFMove(origin))
>+    {
>+    }
>+
>+    virtual ~Continue() = default;
>+
>+    Continue(const Continue&) = delete;
>+    Continue(Continue&&) = default;
>+
>+private:
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTDereferenceExpression.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTDereferenceExpression.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..2d2f1717805536b570630ee2da3370258a507ee7
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTDereferenceExpression.h
>@@ -0,0 +1,62 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class DereferenceExpression : public Expression {
>+public:
>+    DereferenceExpression(Lexer::Token&& origin, std::unique_ptr<Expression>&& pointer)
>+        : Expression(WTFMove(origin))
>+        , m_pointer(WTFMove(pointer))
>+    {
>+    }
>+
>+    virtual ~DereferenceExpression() = default;
>+
>+    DereferenceExpression(const DereferenceExpression&) = delete;
>+    DereferenceExpression(DereferenceExpression&&) = default;
>+
>+private:
>+    std::unique_ptr<Expression> m_pointer;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTDoWhileLoop.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTDoWhileLoop.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..6cc69c27fea53528ab2ef9d5e068d52024e1701e
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTDoWhileLoop.h
>@@ -0,0 +1,65 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLASTStatement.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class DoWhileLoop : public Statement {
>+public:
>+    DoWhileLoop(Lexer::Token&& origin, std::unique_ptr<Statement>&& body, std::unique_ptr<Expression>&& conditional)
>+        : Statement(WTFMove(origin))
>+        , m_body(WTFMove(body))
>+        , m_conditional(WTFMove(conditional))
>+    {
>+    }
>+
>+    virtual ~DoWhileLoop() = default;
>+
>+    DoWhileLoop(const DoWhileLoop&) = delete;
>+    DoWhileLoop(DoWhileLoop&&) = default;
>+
>+private:
>+    std::unique_ptr<Statement> m_body;
>+    std::unique_ptr<Expression> m_conditional;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTDotExpression.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTDotExpression.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..3ecafa2cb2ced72f84c4f97a96349179d7262d2a
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTDotExpression.h
>@@ -0,0 +1,62 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTPropertyAccessExpression.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class DotExpression : public PropertyAccessExpression {
>+public:
>+    DotExpression(Lexer::Token&& origin, std::unique_ptr<Expression>&& base, String&& fieldName)
>+        : PropertyAccessExpression(WTFMove(origin), WTFMove(base))
>+        , m_fieldName(WTFMove(fieldName))
>+    {
>+    }
>+
>+    virtual ~DotExpression() = default;
>+
>+    DotExpression(const DotExpression&) = delete;
>+    DotExpression(DotExpression&&) = default;
>+
>+private:
>+    String m_fieldName;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTEffectfulExpressionStatement.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTEffectfulExpressionStatement.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..fd9aa730804e5e1c0d0e9ceb61b483ba9f6ee673
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTEffectfulExpressionStatement.h
>@@ -0,0 +1,63 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLASTStatement.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class EffectfulExpressionStatement : public Statement {
>+public:
>+    EffectfulExpressionStatement(std::unique_ptr<Expression>&& effectfulExpression)
>+        : Statement(Lexer::Token(effectfulExpression->origin()))
>+        , m_effectfulExpression(WTFMove(effectfulExpression))
>+    {
>+    }
>+
>+    virtual ~EffectfulExpressionStatement() = default;
>+
>+    EffectfulExpressionStatement(const EffectfulExpressionStatement&) = delete;
>+    EffectfulExpressionStatement(EffectfulExpressionStatement&&) = default;
>+
>+private:
>+    std::unique_ptr<Expression> m_effectfulExpression;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTEnumerationDefinition.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTEnumerationDefinition.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..ab4c59c93851c43b495b5ab1f1271c14386dfe3a
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTEnumerationDefinition.h
>@@ -0,0 +1,75 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTEnumerationMember.h"
>+#include "WHLSLASTType.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/Vector.h>
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class EnumerationDefinition : public Type {
>+public:
>+    EnumerationDefinition(Lexer::Token&& origin, String&& name, std::unique_ptr<Type>&& type, Vector<EnumerationMember> members)
>+        : m_origin(WTFMove(origin))
>+        , m_name(WTFMove(name))
>+        , m_type(WTFMove(type))
>+        , m_members(WTFMove(members))
>+    {
>+    }
>+
>+    virtual ~EnumerationDefinition() = default;
>+
>+    EnumerationDefinition(const EnumerationDefinition&) = delete;
>+    EnumerationDefinition(EnumerationDefinition&&) = default;
>+
>+    std::unique_ptr<Type> clone() const override
>+    {
>+        ASSERT_NOT_REACHED();
>+    }
>+
>+private:
>+    Lexer::Token m_origin;
>+    String m_name;
>+    std::unique_ptr<Type> m_type;
>+    Vector<EnumerationMember> m_members;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTEnumerationMember.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTEnumerationMember.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..1ec91eabe9fb42f9897c83ebf2a2e48c9f0ef216
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTEnumerationMember.h
>@@ -0,0 +1,68 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTConstantExpression.h"
>+#include "WHLSLASTNode.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/Optional.h>
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class EnumerationMember : public Node {
>+public:
>+    EnumerationMember(Lexer::Token&& origin, String&& name, std::optional<ConstantExpression>&& value = std::nullopt)
>+        : m_origin(WTFMove(origin))
>+        , m_name(WTFMove(name))
>+        , m_value(WTFMove(value))
>+    {
>+    }
>+
>+    virtual ~EnumerationMember() = default;
>+
>+    EnumerationMember(const EnumerationMember&) = delete;
>+    EnumerationMember(EnumerationMember&&) = default;
>+
>+private:
>+    Lexer::Token m_origin;
>+    String m_name;
>+    std::optional<ConstantExpression> m_value;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTExpression.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTExpression.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..82680321a3175b0b4c218cd68a30dd3fbc8673f2
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTExpression.h
>@@ -0,0 +1,63 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTValue.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class Expression : public Value {
>+public:
>+    Expression(Lexer::Token&& origin)
>+        : m_origin(WTFMove(origin))
>+    {
>+    }
>+
>+    virtual ~Expression() = default;
>+
>+    explicit Expression(const Expression&) = default;
>+    Expression(Expression&&) = default;
>+
>+    Lexer::Token origin() const { return m_origin; }
>+
>+private:
>+    Lexer::Token m_origin;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTFallthrough.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTFallthrough.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..f7e3bb50186bd3900bf196402ee8c124a66843a9
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTFallthrough.h
>@@ -0,0 +1,60 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTStatement.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class Fallthrough : public Statement {
>+public:
>+    Fallthrough(Lexer::Token&& origin)
>+        : Statement(WTFMove(origin))
>+    {
>+    }
>+
>+    virtual ~Fallthrough() = default;
>+
>+    Fallthrough(const Fallthrough&) = delete;
>+    Fallthrough(Fallthrough&&) = default;
>+
>+private:
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTFloatLiteral.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTFloatLiteral.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..e450bd272895a7ccf34b039884b0603661052488
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTFloatLiteral.h
>@@ -0,0 +1,64 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class FloatLiteral : public Expression {
>+public:
>+    FloatLiteral(Lexer::Token&& origin, float value)
>+        : Expression(WTFMove(origin))
>+        , m_value(value)
>+    {
>+    }
>+
>+    virtual ~FloatLiteral() = default;
>+
>+    explicit FloatLiteral(const FloatLiteral&) = default;
>+    FloatLiteral(FloatLiteral&&) = default;
>+
>+    float value() const { return m_value; }
>+
>+private:
>+    float m_value;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTForLoop.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTForLoop.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..226063847645d5f07621e68a2e3a9c517f9636ff
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTForLoop.h
>@@ -0,0 +1,74 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLASTStatement.h"
>+#include "WHLSLASTVariableDeclarationsStatement.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/Variant.h>
>+#include <wtf/Vector.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class ForLoop : public Statement {
>+public:
>+    ForLoop(Lexer::Token&& origin, Variant<VariableDeclarationsStatement, std::unique_ptr<Expression>>&& initialization, std::unique_ptr<Expression>&& condition, std::unique_ptr<Expression>&& increment, std::unique_ptr<Statement>&& body)
>+        : Statement(WTFMove(origin))
>+        , m_initialization(WTFMove(initialization))
>+        , m_condition(WTFMove(condition))
>+        , m_increment(WTFMove(increment))
>+        , m_body(WTFMove(body))
>+    {
>+    }
>+
>+    virtual ~ForLoop()
>+    {
>+    }
>+
>+    ForLoop(const ForLoop&) = delete;
>+    ForLoop(ForLoop&&) = default;
>+
>+private:
>+    Variant<VariableDeclarationsStatement, std::unique_ptr<Expression>> m_initialization;
>+    std::unique_ptr<Expression> m_condition; // nullable
>+    std::unique_ptr<Expression> m_increment; // nullable
>+    std::unique_ptr<Statement> m_body;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTFunctionAttribute.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTFunctionAttribute.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..ec2dff4d606d47b122acad2967de9ac88fc97acd
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTFunctionAttribute.h
>@@ -0,0 +1,49 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTNumThreadsFunctionAttribute.h"
>+#include <wtf/Variant.h>
>+#include <wtf/Vector.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+typedef Variant<NumThreadsFunctionAttribute> FunctionAttribute;
>+typedef Vector<FunctionAttribute> AttributeBlock;
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTFunctionDeclaration.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTFunctionDeclaration.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..ff78c4d8b9a6fb009b09b9c105d60c44da5cea5d
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTFunctionDeclaration.h
>@@ -0,0 +1,92 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTFunctionAttribute.h"
>+#include "WHLSLASTNode.h"
>+#include "WHLSLASTParameter.h"
>+#include "WHLSLASTSemantic.h"
>+#include "WHLSLASTType.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class FunctionDeclaration : public Node {
>+public:
>+    enum class EntryPointType {
>+        Vertex,
>+        Fragment,
>+        Compute
>+    };
>+
>+    FunctionDeclaration(Lexer::Token&& origin, AttributeBlock&& attributeBlock, std::optional<EntryPointType> entryPointType, std::unique_ptr<AST::Type>&& type, String&& name, Parameters&& parameters, std::optional<AST::Semantic>&& semantic)
>+        : m_origin(WTFMove(origin))
>+        , m_attributeBlock(WTFMove(attributeBlock))
>+        , m_entryPointType(entryPointType)
>+        , m_type(WTFMove(type))
>+        , m_name(WTFMove(name))
>+        , m_parameters(WTFMove(parameters))
>+        , m_semantic(WTFMove(semantic))
>+    {
>+    }
>+
>+    virtual ~FunctionDeclaration() = default;
>+
>+    FunctionDeclaration(const FunctionDeclaration&) = delete;
>+    FunctionDeclaration(FunctionDeclaration&&) = default;
>+
>+    Lexer::Token&& takeOrigin() { return WTFMove(m_origin); }
>+    AttributeBlock&& takeAttributeBlock() { return WTFMove(m_attributeBlock); }
>+    std::optional<EntryPointType>&& takeEntryPointType() { return WTFMove(m_entryPointType); }
>+    std::unique_ptr<AST::Type>&& takeType() { return WTFMove(m_type); }
>+    String&& takeName() { return WTFMove(m_name); }
>+    Parameters&& takeParameters() { return WTFMove(m_parameters); }
>+    std::optional<AST::Semantic>&& takeSemantic() { return WTFMove(m_semantic); }
>+
>+private:
>+    Lexer::Token m_origin;
>+    AttributeBlock m_attributeBlock;
>+    std::optional<EntryPointType> m_entryPointType;
>+    std::unique_ptr<AST::Type> m_type;
>+    String m_name;
>+    Parameters m_parameters;
>+    std::optional<AST::Semantic> m_semantic;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTFunctionDefinition.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTFunctionDefinition.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..8d7209a6c7f2751d889e447541233b8ee641de14
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTFunctionDefinition.h
>@@ -0,0 +1,66 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTBlock.h"
>+#include "WHLSLASTFunctionDeclaration.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class FunctionDefinition : public FunctionDeclaration {
>+public:
>+    FunctionDefinition(FunctionDeclaration&& functionDeclaration, Block&& block, bool restricted)
>+        : FunctionDeclaration(WTFMove(functionDeclaration))
>+        , m_block(WTFMove(block))
>+        , m_restricted(restricted)
>+    {
>+    }
>+
>+    virtual ~FunctionDefinition() = default;
>+
>+    FunctionDefinition(const FunctionDefinition&) = delete;
>+    FunctionDefinition(FunctionDefinition&&) = default;
>+
>+    bool restricted() const { return m_restricted; }
>+
>+private:
>+    Block m_block;
>+    bool m_restricted;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTIfStatement.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTIfStatement.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..18131e443b3168299c2f86cd5b9a4f22095513e4
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTIfStatement.h
>@@ -0,0 +1,67 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLASTStatement.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class IfStatement : public Statement {
>+public:
>+    IfStatement(Lexer::Token&& origin, std::unique_ptr<Expression>&& conditional, std::unique_ptr<Statement>&& body, std::unique_ptr<Statement>&& elseBody)
>+        : Statement(WTFMove(origin))
>+        , m_conditional(WTFMove(conditional))
>+        , m_body(WTFMove(body))
>+        , m_elseBody(WTFMove(elseBody))
>+    {
>+    }
>+
>+    virtual ~IfStatement() = default;
>+
>+    IfStatement(const IfStatement&) = delete;
>+    IfStatement(IfStatement&&) = default;
>+
>+private:
>+    std::unique_ptr<Expression> m_conditional;
>+    std::unique_ptr<Statement> m_body;
>+    std::unique_ptr<Statement> m_elseBody;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTIndexExpression.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTIndexExpression.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..0412fa0fdc99a8217101346093a99a9b69ffdebe
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTIndexExpression.h
>@@ -0,0 +1,62 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTPropertyAccessExpression.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class IndexExpression : public PropertyAccessExpression {
>+public:
>+    IndexExpression(Lexer::Token&& origin, std::unique_ptr<Expression>&& base, std::unique_ptr<Expression>&& index)
>+        : PropertyAccessExpression(WTFMove(origin), WTFMove(base))
>+        , m_index(WTFMove(index))
>+    {
>+    }
>+
>+    virtual ~IndexExpression() = default;
>+
>+    IndexExpression(const IndexExpression&) = delete;
>+    IndexExpression(IndexExpression&&) = default;
>+
>+private:
>+    std::unique_ptr<Expression> m_index;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTIntegerLiteral.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTIntegerLiteral.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..d6b51d18fceaf5155f94e8865877cfec02c4d0e2
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTIntegerLiteral.h
>@@ -0,0 +1,64 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class IntegerLiteral : public Expression {
>+public:
>+    IntegerLiteral(Lexer::Token&& origin, int value)
>+        : Expression(WTFMove(origin))
>+        , m_value(value)
>+    {
>+    }
>+
>+    virtual ~IntegerLiteral() = default;
>+
>+    explicit IntegerLiteral(const IntegerLiteral&) = default;
>+    IntegerLiteral(IntegerLiteral&&) = default;
>+
>+    int value() const { return m_value; }
>+
>+private:
>+    int m_value;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTLogicalExpression.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTLogicalExpression.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..77beb1e3b9103eca0d9917665c28aa6b1f71edaf
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTLogicalExpression.h
>@@ -0,0 +1,73 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class LogicalExpression : public Expression {
>+public:
>+    enum class Type {
>+        And,
>+        Or
>+    };
>+
>+    LogicalExpression(Lexer::Token&& origin, Type type, std::unique_ptr<Expression>&& left, std::unique_ptr<Expression>&& right)
>+        : Expression(WTFMove(origin))
>+        , m_type(type)
>+        , m_left(WTFMove(left))
>+        , m_right(WTFMove(right))
>+    {
>+    }
>+
>+    virtual ~LogicalExpression() = default;
>+
>+    LogicalExpression(const LogicalExpression&) = delete;
>+    LogicalExpression(LogicalExpression&&) = default;
>+
>+    Type type() const { return m_type; }
>+
>+private:
>+    Type m_type;
>+    std::unique_ptr<Expression> m_left;
>+    std::unique_ptr<Expression> m_right;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTLogicalNotExpression.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTLogicalNotExpression.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..8c93d8857613ad5ef7aa2b15de0d960c07061180
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTLogicalNotExpression.h
>@@ -0,0 +1,62 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class LogicalNotExpression : public Expression {
>+public:
>+    LogicalNotExpression(Lexer::Token&& origin, std::unique_ptr<Expression>&& operand)
>+        : Expression(WTFMove(origin))
>+        , m_operand(WTFMove(operand))
>+    {
>+    }
>+
>+    virtual ~LogicalNotExpression() = default;
>+
>+    LogicalNotExpression(const LogicalNotExpression&) = delete;
>+    LogicalNotExpression(LogicalNotExpression&&) = default;
>+
>+private:
>+    std::unique_ptr<Expression> m_operand;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTMakeArrayReferenceExpression.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTMakeArrayReferenceExpression.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..10f8206e88a67187cf0d00c6520e65f3730f7b70
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTMakeArrayReferenceExpression.h
>@@ -0,0 +1,62 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class MakeArrayReferenceExpression : public Expression {
>+public:
>+    MakeArrayReferenceExpression(Lexer::Token&& origin, std::unique_ptr<Expression>&& lValue)
>+        : Expression(WTFMove(origin))
>+        , m_lValue(WTFMove(lValue))
>+    {
>+    }
>+
>+    virtual ~MakeArrayReferenceExpression() = default;
>+
>+    MakeArrayReferenceExpression(const MakeArrayReferenceExpression&) = delete;
>+    MakeArrayReferenceExpression(MakeArrayReferenceExpression&&) = default;
>+
>+private:
>+    std::unique_ptr<Expression> m_lValue;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTMakePointerExpression.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTMakePointerExpression.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..69fa9240e10f3ee6537f19cfbf41f74de21c5337
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTMakePointerExpression.h
>@@ -0,0 +1,62 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class MakePointerExpression : public Expression {
>+public:
>+    MakePointerExpression(Lexer::Token&& origin, std::unique_ptr<Expression>&& lValue)
>+        : Expression(WTFMove(origin))
>+        , m_lValue(WTFMove(lValue))
>+    {
>+    }
>+
>+    virtual ~MakePointerExpression() = default;
>+
>+    MakePointerExpression(const MakePointerExpression&) = delete;
>+    MakePointerExpression(MakePointerExpression&&) = default;
>+
>+private:
>+    std::unique_ptr<Expression> m_lValue;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTNativeFunctionDeclaration.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTNativeFunctionDeclaration.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..1a7ea684d0f2801e94b7b943e7d5aa1ce1dd74be
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTNativeFunctionDeclaration.h
>@@ -0,0 +1,63 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTFunctionDeclaration.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class NativeFunctionDeclaration : public FunctionDeclaration {
>+public:
>+    NativeFunctionDeclaration(Lexer::Token&& origin, AttributeBlock&& attributeBlock, std::optional<EntryPointType> entryPointType, std::unique_ptr<AST::Type>&& type, String&& name, Parameters&& parameters, std::optional<AST::Semantic>&& semantic, bool restricted)
>+        : FunctionDeclaration(WTFMove(origin), WTFMove(attributeBlock), WTFMove(entryPointType), WTFMove(type), WTFMove(name), WTFMove(parameters), WTFMove(semantic))
>+        , m_restricted(restricted)
>+    {
>+    }
>+
>+    virtual ~NativeFunctionDeclaration() = default;
>+
>+    NativeFunctionDeclaration(const NativeFunctionDeclaration&) = delete;
>+    NativeFunctionDeclaration(NativeFunctionDeclaration&&) = default;
>+
>+    bool restricted() const { return m_restricted; }
>+
>+private:
>+    bool m_restricted;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTNativeTypeDeclaration.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTNativeTypeDeclaration.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..c8050005dd1767882f30bec86374ad4ab0c0d449
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTNativeTypeDeclaration.h
>@@ -0,0 +1,72 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTType.h"
>+#include "WHLSLASTTypeArgument.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class NativeTypeDeclaration : public Type {
>+public:
>+    NativeTypeDeclaration(Lexer::Token&& origin, String&& name, TypeArguments&& typeArguments)
>+        : m_origin(WTFMove(origin))
>+        , m_name(WTFMove(name))
>+        , m_typeArguments(WTFMove(typeArguments))
>+    {
>+    }
>+
>+    virtual ~NativeTypeDeclaration() = default;
>+
>+    NativeTypeDeclaration(const NativeTypeDeclaration&) = delete;
>+    NativeTypeDeclaration(NativeTypeDeclaration&&) = default;
>+
>+    std::unique_ptr<Type> clone() const override
>+    {
>+        ASSERT_NOT_REACHED();
>+    }
>+
>+private:
>+    Lexer::Token m_origin;
>+    String m_name;
>+    TypeArguments m_typeArguments;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTNode.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTNode.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..f6c4f0060c04d7722fe64b2c31727b54b2b2e166
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTNode.h
>@@ -0,0 +1,54 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class Node {
>+public:
>+    Node() = default;
>+
>+    virtual ~Node() = default;
>+
>+    explicit Node(const Node&) = default;
>+    Node(Node&&) = default;
>+
>+private:
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTNullLiteral.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTNullLiteral.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..5ba7f687e837ddba06b7c78ab53a444286754751
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTNullLiteral.h
>@@ -0,0 +1,60 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class NullLiteral : public Expression {
>+public:
>+    NullLiteral(Lexer::Token&& origin)
>+        : Expression(WTFMove(origin))
>+    {
>+    }
>+
>+    virtual ~NullLiteral() = default;
>+
>+    explicit NullLiteral(const NullLiteral&) = default;
>+    NullLiteral(NullLiteral&&) = default;
>+
>+private:
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTNumThreadsFunctionAttribute.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTNumThreadsFunctionAttribute.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..eb1681d22a6227f6358e711560d4da10b35a4452
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTNumThreadsFunctionAttribute.h
>@@ -0,0 +1,69 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTBaseFunctionAttribute.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class NumThreadsFunctionAttribute : public BaseFunctionAttribute {
>+public:
>+    NumThreadsFunctionAttribute(Lexer::Token&& origin, unsigned width, unsigned height, unsigned depth)
>+        : BaseFunctionAttribute(WTFMove(origin))
>+        , m_width(width)
>+        , m_height(height)
>+        , m_depth(depth)
>+    {
>+    }
>+
>+    virtual ~NumThreadsFunctionAttribute() = default;
>+
>+    NumThreadsFunctionAttribute(const NumThreadsFunctionAttribute&) = delete;
>+    NumThreadsFunctionAttribute(NumThreadsFunctionAttribute&&) = default;
>+
>+    unsigned width() const { return m_width; }
>+    unsigned height() const { return m_height; }
>+    unsigned depth() const { return m_depth; }
>+
>+private:
>+    unsigned m_width;
>+    unsigned m_height;
>+    unsigned m_depth;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTParameter.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTParameter.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..6b919fa5753e3f61bbfa21360370b8f0d2db8a26
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTParameter.h
>@@ -0,0 +1,76 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTQualifier.h"
>+#include "WHLSLASTSemantic.h"
>+#include "WHLSLASTType.h"
>+#include "WHLSLASTValue.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/Vector.h>
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class Parameter : public Value {
>+public:
>+    Parameter(Lexer::Token&& origin, Qualifiers&& qualifiers, std::unique_ptr<AST::Type>&& type, std::optional<String>&& name, std::optional<AST::Semantic>&& semantic)
>+        : m_origin(WTFMove(origin))
>+        , m_qualifiers(WTFMove(qualifiers))
>+        , m_type(WTFMove(type))
>+        , m_name(WTFMove(name))
>+        , m_semantic(WTFMove(semantic))
>+    {
>+    }
>+
>+    virtual ~Parameter() = default;
>+
>+    Parameter(const Parameter&) = delete;
>+    Parameter(Parameter&&) = default;
>+
>+private:
>+    Lexer::Token m_origin;
>+    Qualifiers m_qualifiers;
>+    std::unique_ptr<AST::Type> m_type;
>+    std::optional<String> m_name;
>+    std::optional<AST::Semantic> m_semantic;
>+};
>+
>+typedef Vector<Parameter> Parameters;
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTPointerType.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTPointerType.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..4d4bf5cacf58b30367fcccd712e4a62b86d17bf8
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTPointerType.h
>@@ -0,0 +1,66 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTReferenceType.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class PointerType : public ReferenceType {
>+public:
>+    PointerType(Lexer::Token&& origin, String&& addressSpace, std::unique_ptr<Type> elementType)
>+        : ReferenceType(WTFMove(origin), WTFMove(addressSpace), WTFMove(elementType))
>+    {
>+    }
>+
>+    virtual ~PointerType() = default;
>+
>+    PointerType(const PointerType&) = delete;
>+    PointerType(PointerType&&) = default;
>+
>+    std::unique_ptr<Type> clone() const override
>+    {
>+        return std::make_unique<PointerType>(Lexer::Token(origin()), String(addressSpace()), elementType()->clone());
>+    }
>+
>+private:
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTPropertyAccessExpression.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTPropertyAccessExpression.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..f12b3b28a21768cd0174743bc307ada97cb791c1
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTPropertyAccessExpression.h
>@@ -0,0 +1,62 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class PropertyAccessExpression : public Expression {
>+public:
>+    PropertyAccessExpression(Lexer::Token&& origin, std::unique_ptr<Expression>&& base)
>+        : Expression(WTFMove(origin))
>+        , m_base(WTFMove(base))
>+    {
>+    }
>+
>+    virtual ~PropertyAccessExpression() = default;
>+
>+    PropertyAccessExpression(const PropertyAccessExpression&) = delete;
>+    PropertyAccessExpression(PropertyAccessExpression&&) = default;
>+
>+private:
>+    std::unique_ptr<Expression> m_base;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTQualifier.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTQualifier.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..57fda540729a72cb228570554b050a84fef6c508
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTQualifier.h
>@@ -0,0 +1,57 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTType.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/Vector.h>
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+enum class Qualifier {
>+    Nointerpolation,
>+    Noperspective,
>+    Uniform,
>+    Centroid,
>+    Sample
>+};
>+
>+typedef Vector<Qualifier> Qualifiers;
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTReadModifyWriteExpression.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTReadModifyWriteExpression.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..7814e58aa01aa9dd96bc2adfad70ce0eb6f659ec
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTReadModifyWriteExpression.h
>@@ -0,0 +1,99 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTAnonymousVariableDeclaration.h"
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLASTVariableReference.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+/*
>+ *  1. Evaluate m_lValue
>+ *  2. Assign the result to m_oldValue
>+ *  3. Evaluate m_newValueExpression
>+ *  4. Assign the result to m_newValue
>+ *  5. Assign the result to m_lValue
>+ *  6. Evaluate m_resultExpression
>+ *  7. Return the result
>+ */
>+class ReadModifyWriteExpression : public Expression {
>+public:
>+    ReadModifyWriteExpression(Lexer::Token&& origin, std::unique_ptr<Expression> lValue)
>+        : Expression(Lexer::Token(origin))
>+        , m_lValue(WTFMove(lValue))
>+        , m_oldValue(Lexer::Token(origin))
>+        , m_newValue(WTFMove(origin))
>+    {
>+    }
>+
>+    virtual ~ReadModifyWriteExpression() = default;
>+
>+    ReadModifyWriteExpression(const ReadModifyWriteExpression&) = delete;
>+    ReadModifyWriteExpression(ReadModifyWriteExpression&&) = default;
>+
>+    void setNewValueExpression(std::unique_ptr<Expression>&& newValueExpression)
>+    {
>+        m_newValueExpression = WTFMove(newValueExpression);
>+    }
>+
>+    void setResultExpression(std::unique_ptr<Expression>&& resultExpression)
>+    {
>+        m_resultExpression = WTFMove(resultExpression);
>+    }
>+
>+    std::unique_ptr<VariableReference> oldVariableReference()
>+    {
>+        return std::make_unique<VariableReference>(VariableReference::wrap(m_oldValue));
>+    }
>+
>+    std::unique_ptr<VariableReference> newVariableReference()
>+    {
>+        return std::make_unique<VariableReference>(VariableReference::wrap(m_newValue));
>+    }
>+
>+private:
>+    std::unique_ptr<Expression> m_lValue;
>+    AnonymousVariableDeclaration m_oldValue;
>+    AnonymousVariableDeclaration m_newValue;
>+    std::unique_ptr<Expression> m_newValueExpression;
>+    std::unique_ptr<Expression> m_resultExpression;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTReferenceType.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTReferenceType.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..701bbb1ba57df979bf9d09917b9b6bd41486f83b
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTReferenceType.h
>@@ -0,0 +1,71 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTType.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class ReferenceType : public Type {
>+public:
>+    ReferenceType(Lexer::Token&& origin, String&& addressSpace, std::unique_ptr<Type>&& elementType)
>+        : m_origin(WTFMove(origin))
>+        , m_addressSpace(WTFMove(addressSpace))
>+        , m_elementType(WTFMove(elementType))
>+    {
>+    }
>+
>+    virtual ~ReferenceType() = default;
>+
>+    ReferenceType(const ReferenceType&) = delete;
>+    ReferenceType(ReferenceType&&) = default;
>+
>+protected:
>+    const Lexer::Token& origin() const { return m_origin; }
>+    const String& addressSpace() const { return m_addressSpace; }
>+    const std::unique_ptr<Type>& elementType() const { return m_elementType; }
>+
>+private:
>+    Lexer::Token m_origin;
>+    String m_addressSpace;
>+    std::unique_ptr<Type> m_elementType;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTResourceSemantic.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTResourceSemantic.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..811cece3486db42aed610512bbedbe844249b227
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTResourceSemantic.h
>@@ -0,0 +1,77 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTBaseSemantic.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class ResourceSemantic : public BaseSemantic {
>+public:
>+    enum class Mode {
>+        UnorderedAccessView,
>+        Texture,
>+        Buffer,
>+        Sampler
>+    };
>+
>+    ResourceSemantic(Lexer::Token&& origin, Mode mode, unsigned index, unsigned space)
>+        : BaseSemantic(WTFMove(origin))
>+        , m_mode(mode)
>+        , m_index(index)
>+        , m_space(space)
>+    {
>+    }
>+
>+    virtual ~ResourceSemantic() = default;
>+
>+    ResourceSemantic(const ResourceSemantic&) = delete;
>+    ResourceSemantic(ResourceSemantic&&) = default;
>+
>+    Mode mode() const { return m_mode; }
>+    unsigned index() const { return m_index; }
>+    unsigned space() const { return m_space; }
>+
>+private:
>+    Mode m_mode;
>+    unsigned m_index;
>+    unsigned m_space;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTReturn.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTReturn.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..10d786fcec6766f92d0f308d53d18cff9f750801
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTReturn.h
>@@ -0,0 +1,63 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLASTStatement.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class Return : public Statement {
>+public:
>+    Return(Lexer::Token&& origin, std::unique_ptr<Expression>&& value)
>+        : Statement(WTFMove(origin))
>+        , m_value(WTFMove(value))
>+    {
>+    }
>+
>+    virtual ~Return() = default;
>+
>+    Return(const Return&) = delete;
>+    Return(Return&&) = default;
>+
>+private:
>+    std::unique_ptr<Expression> m_value;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTSemantic.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTSemantic.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..67c0f9ca97c9fe9afde465e7ed42a9c75b27e59e
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTSemantic.h
>@@ -0,0 +1,50 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTBuiltInSemantic.h"
>+#include "WHLSLASTResourceSemantic.h"
>+#include "WHLSLASTSpecializationConstantSemantic.h"
>+#include "WHLSLASTStageInOutSemantic.h"
>+#include <wtf/Variant.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+typedef Variant<BuiltInSemantic, ResourceSemantic, SpecializationConstantSemantic, StageInOutSemantic> Semantic;
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTSpecializationConstantSemantic.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTSpecializationConstantSemantic.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..07d9498c55f104337eb53960ab2ee97129df91e5
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTSpecializationConstantSemantic.h
>@@ -0,0 +1,60 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTBaseSemantic.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class SpecializationConstantSemantic : public BaseSemantic {
>+public:
>+    SpecializationConstantSemantic(Lexer::Token&& origin)
>+        : BaseSemantic(WTFMove(origin))
>+    {
>+    }
>+
>+    virtual ~SpecializationConstantSemantic() = default;
>+
>+    SpecializationConstantSemantic(const SpecializationConstantSemantic&) = delete;
>+    SpecializationConstantSemantic(SpecializationConstantSemantic&&) = default;
>+
>+private:
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTStageInOutSemantic.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTStageInOutSemantic.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..5be924a7309a9804ea46287a39f38907cfc085d4
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTStageInOutSemantic.h
>@@ -0,0 +1,64 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTBaseSemantic.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class StageInOutSemantic : public BaseSemantic {
>+public:
>+    StageInOutSemantic(Lexer::Token&& origin, unsigned index)
>+        : BaseSemantic(WTFMove(origin))
>+        , m_index(index)
>+    {
>+    }
>+
>+    virtual ~StageInOutSemantic() = default;
>+
>+    StageInOutSemantic(const StageInOutSemantic&) = delete;
>+    StageInOutSemantic(StageInOutSemantic&&) = default;
>+
>+    unsigned index() const { return m_index; }
>+
>+private:
>+    unsigned m_index;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTStatement.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTStatement.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..2686edff4d66dbe7ad33fe8f96273420bcb8451d
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTStatement.h
>@@ -0,0 +1,61 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTValue.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class Statement : public Value {
>+public:
>+    Statement(Lexer::Token&& origin)
>+        : m_origin(WTFMove(origin))
>+    {
>+    }
>+
>+    virtual ~Statement() = default;
>+
>+    Statement(const Statement&) = delete;
>+    Statement(Statement&&) = default;
>+
>+private:
>+    Lexer::Token m_origin;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTStructureDefinition.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTStructureDefinition.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..b1f0b4d0d9ad2be5674a9933ca92b8156c8c7160
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTStructureDefinition.h
>@@ -0,0 +1,73 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTStructureElement.h"
>+#include "WHLSLASTType.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/Vector.h>
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class StructureDefinition : public Type {
>+public:
>+    StructureDefinition(Lexer::Token&& origin, String&& name, StructureElements&& structureElements)
>+        : m_origin(WTFMove(origin))
>+        , m_name(WTFMove(name))
>+        , m_structureElements(WTFMove(structureElements))
>+    {
>+    }
>+
>+    virtual ~StructureDefinition() = default;
>+
>+    StructureDefinition(const StructureDefinition&) = delete;
>+    StructureDefinition(StructureDefinition&&) = default;
>+
>+    std::unique_ptr<Type> clone() const override
>+    {
>+        ASSERT_NOT_REACHED();
>+    }
>+
>+private:
>+    Lexer::Token m_origin;
>+    String m_name;
>+    StructureElements m_structureElements;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTStructureElement.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTStructureElement.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..fc59990f120d0b2fd3a2175b220026fe74c049f5
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTStructureElement.h
>@@ -0,0 +1,74 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTNode.h"
>+#include "WHLSLASTQualifier.h"
>+#include "WHLSLASTSemantic.h"
>+#include "WHLSLASTType.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class StructureElement : public Node {
>+public:
>+    StructureElement(Lexer::Token&& origin, Qualifiers&& qualifiers, std::unique_ptr<Type>&& type, String&& name, std::optional<Semantic> semantic)
>+        : m_origin(WTFMove(origin))
>+        , m_qualifiers(WTFMove(qualifiers))
>+        , m_type(WTFMove(type))
>+        , m_name(WTFMove(name))
>+        , m_semantic(WTFMove(semantic))
>+    {
>+    }
>+
>+    virtual ~StructureElement() = default;
>+
>+    StructureElement(const StructureElement&) = delete;
>+    StructureElement(StructureElement&&) = default;
>+
>+private:
>+    Lexer::Token m_origin;
>+    Qualifiers m_qualifiers;
>+    std::unique_ptr<Type> m_type;
>+    String m_name;
>+    std::optional<Semantic> m_semantic;
>+};
>+
>+typedef Vector<StructureElement> StructureElements;
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTSwitchCase.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTSwitchCase.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..b44d0ecf74eb01d783471d7c4bd0b9279cb19484
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTSwitchCase.h
>@@ -0,0 +1,67 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTBlock.h"
>+#include "WHLSLASTConstantExpression.h"
>+#include "WHLSLASTStatement.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/Optional.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class SwitchCase : public Statement {
>+public:
>+    SwitchCase(Lexer::Token&& origin, std::optional<ConstantExpression>&& value, Block&& block)
>+        : Statement(WTFMove(origin))
>+        , m_value(WTFMove(value))
>+        , m_block(WTFMove(block))
>+    {
>+    }
>+
>+    virtual ~SwitchCase() = default;
>+
>+    SwitchCase(const SwitchCase&) = delete;
>+    SwitchCase(SwitchCase&&) = default;
>+
>+private:
>+    std::optional<ConstantExpression> m_value;
>+    Block m_block;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTSwitchStatement.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTSwitchStatement.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..736ef1168481738dc07dcc646ec698ccef31d59c
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTSwitchStatement.h
>@@ -0,0 +1,66 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLASTStatement.h"
>+#include "WHLSLASTSwitchCase.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class SwitchStatement : public Statement {
>+public:
>+    SwitchStatement(Lexer::Token&& origin, std::unique_ptr<Expression>&& value, Vector<SwitchCase>&& switchCases)
>+        : Statement(WTFMove(origin))
>+        , m_value(WTFMove(value))
>+        , m_switchCases(WTFMove(switchCases))
>+    {
>+    }
>+
>+    virtual ~SwitchStatement() = default;
>+
>+    SwitchStatement(const SwitchStatement&) = delete;
>+    SwitchStatement(SwitchStatement&&) = default;
>+
>+private:
>+    std::unique_ptr<Expression> m_value;
>+    Vector<SwitchCase> m_switchCases;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTTernaryExpression.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTTernaryExpression.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..cbfb5968a6dab9fd335c06f00254e6b66ca60d0d
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTTernaryExpression.h
>@@ -0,0 +1,66 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class TernaryExpression : public Expression {
>+public:
>+    TernaryExpression(Lexer::Token&& origin, std::unique_ptr<Expression>&& predicate, std::unique_ptr<Expression>&& bodyExpression, std::unique_ptr<Expression>&& elseExpression)
>+        : Expression(WTFMove(origin))
>+        , m_predicate(WTFMove(predicate))
>+        , m_bodyExpression(WTFMove(bodyExpression))
>+        , m_elseExpression(WTFMove(elseExpression))
>+    {
>+    }
>+
>+    virtual ~TernaryExpression() = default;
>+
>+    TernaryExpression(const TernaryExpression&) = delete;
>+    TernaryExpression(TernaryExpression&&) = default;
>+
>+private:
>+    std::unique_ptr<Expression> m_predicate;
>+    std::unique_ptr<Expression> m_bodyExpression;
>+    std::unique_ptr<Expression> m_elseExpression;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTTrap.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTTrap.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..577714b2596483e454028258bb835cc4362a6134
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTTrap.h
>@@ -0,0 +1,60 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTStatement.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class Trap : public Statement {
>+public:
>+    Trap(Lexer::Token&& origin)
>+        : Statement(WTFMove(origin))
>+    {
>+    }
>+
>+    virtual ~Trap() = default;
>+
>+    Trap(const Trap&) = delete;
>+    Trap(Trap&&) = default;
>+
>+private:
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTType.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTType.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..df6ecec669becef93a8fdf284cce16fd74017521
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTType.h
>@@ -0,0 +1,58 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTNode.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class Type : public Node {
>+public:
>+    Type() = default;
>+
>+    virtual ~Type() = default;
>+
>+    Type(const Type&) = delete;
>+    Type(Type&&) = default;
>+
>+    virtual std::unique_ptr<Type> clone() const = 0;
>+
>+private:
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTTypeArgument.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTTypeArgument.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..a416896ad4a851582654e708500396c6b0d68c87
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTTypeArgument.h
>@@ -0,0 +1,51 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTConstantExpression.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/Variant.h>
>+#include <wtf/Vector.h>
>+#include <wtf/text/StringView.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+typedef Variant<ConstantExpression, String> TypeArgument;
>+typedef Vector<TypeArgument> TypeArguments;
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTTypeDefinition.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTTypeDefinition.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..724c2132ee6598df3b22861ba875d0ae4ffbed84
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTTypeDefinition.h
>@@ -0,0 +1,72 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTNode.h"
>+#include "WHLSLASTType.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class TypeDefinition : public Type {
>+public:
>+    TypeDefinition(Lexer::Token&& origin, String&& name, std::unique_ptr<AST::Type>&& type)
>+        : m_origin(WTFMove(origin))
>+        , m_name(WTFMove(name))
>+        , m_type(WTFMove(type))
>+    {
>+    }
>+
>+    virtual ~TypeDefinition() = default;
>+
>+    TypeDefinition(const TypeDefinition&) = delete;
>+    TypeDefinition(TypeDefinition&&) = default;
>+
>+    std::unique_ptr<Type> clone() const override
>+    {
>+        ASSERT_NOT_REACHED();
>+    }
>+
>+private:
>+    Lexer::Token m_origin;
>+    String m_name;
>+    std::unique_ptr<AST::Type> m_type;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTTypeReference.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTTypeReference.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..6bbab389950b0a4384ebf9d7888a776bafcbe0c4
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTTypeReference.h
>@@ -0,0 +1,72 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTType.h"
>+#include "WHLSLASTTypeArgument.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class TypeReference : public Type {
>+public:
>+    TypeReference(Lexer::Token&& origin, String&& name, TypeArguments&& typeArguments)
>+        : m_origin(WTFMove(origin))
>+        , m_name(WTFMove(name))
>+        , m_typeArguments(WTFMove(typeArguments))
>+    {
>+    }
>+
>+    virtual ~TypeReference() = default;
>+
>+    TypeReference(const TypeReference&) = delete;
>+    TypeReference(TypeReference&&) = default;
>+
>+    std::unique_ptr<Type> clone() const override
>+    {
>+        return std::make_unique<TypeReference>(Lexer::Token(m_origin), String(m_name), TypeArguments(m_typeArguments));
>+    }
>+
>+private:
>+    Lexer::Token m_origin;
>+    String m_name;
>+    TypeArguments m_typeArguments;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTUnsignedIntegerLiteral.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTUnsignedIntegerLiteral.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..67b9c22793a8f11ae2db0c998cb9879c4369e99d
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTUnsignedIntegerLiteral.h
>@@ -0,0 +1,64 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class UnsignedIntegerLiteral : public Expression {
>+public:
>+    UnsignedIntegerLiteral(Lexer::Token&& origin, unsigned value)
>+        : Expression(WTFMove(origin))
>+        , m_value(value)
>+    {
>+    }
>+
>+    virtual ~UnsignedIntegerLiteral() = default;
>+
>+    explicit UnsignedIntegerLiteral(const UnsignedIntegerLiteral&) = default;
>+    UnsignedIntegerLiteral(UnsignedIntegerLiteral&&) = default;
>+
>+    unsigned value() const { return m_value; }
>+
>+private:
>+    unsigned m_value;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTValue.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTValue.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..bc7067eff72064c6b5b72ff8d6e9fbccbcb3deaf
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTValue.h
>@@ -0,0 +1,58 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTNode.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class Value : public Node {
>+public:
>+    Value()
>+    {
>+    }
>+
>+    virtual ~Value() = default;
>+
>+    explicit Value(const Value&) = default;
>+    Value(Value&&) = default;
>+
>+private:
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTVariableDeclaration.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTVariableDeclaration.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..1a9c81ace341f84e85f892d742a8a9757baf76c0
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTVariableDeclaration.h
>@@ -0,0 +1,79 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLASTQualifier.h"
>+#include "WHLSLASTSemantic.h"
>+#include "WHLSLASTType.h"
>+#include "WHLSLASTValue.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/Vector.h>
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class VariableDeclaration : public Value {
>+public:
>+    VariableDeclaration(Lexer::Token&& origin, Qualifiers&& qualifiers, std::unique_ptr<AST::Type>&& type, String&& name, std::optional<Semantic>&& semantic, std::unique_ptr<Expression>&& initializer)
>+        : m_origin(WTFMove(origin))
>+        , m_qualifiers(WTFMove(qualifiers))
>+        , m_type(WTFMove(type))
>+        , m_name(WTFMove(name))
>+        , m_semantic(WTFMove(semantic))
>+        , m_initializer(WTFMove(initializer))
>+    {
>+    }
>+
>+    virtual ~VariableDeclaration() = default;
>+
>+    VariableDeclaration(const VariableDeclaration&) = delete;
>+    VariableDeclaration(VariableDeclaration&&) = default;
>+
>+    Lexer::Token origin() const { return m_origin; }
>+
>+private:
>+    Lexer::Token m_origin;
>+    Qualifiers m_qualifiers;
>+    std::unique_ptr<AST::Type> m_type;
>+    String m_name;
>+    std::optional<Semantic> m_semantic;
>+    std::unique_ptr<Expression> m_initializer;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTVariableDeclarationsStatement.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTVariableDeclarationsStatement.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..30be3f45b98797861e14d84a1cb445d10ee6fd0b
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTVariableDeclarationsStatement.h
>@@ -0,0 +1,64 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTStatement.h"
>+#include "WHLSLASTVariableDeclaration.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/Vector.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class VariableDeclarationsStatement : public Statement {
>+public:
>+    VariableDeclarationsStatement(Lexer::Token&& origin, Vector<VariableDeclaration>&& variableDeclarations)
>+        : Statement(WTFMove(origin))
>+        , m_variableDeclarations(WTFMove(variableDeclarations))
>+    {
>+    }
>+
>+    virtual ~VariableDeclarationsStatement() = default;
>+
>+    VariableDeclarationsStatement(const VariableDeclarationsStatement&) = delete;
>+    VariableDeclarationsStatement(VariableDeclarationsStatement&&) = default;
>+
>+private:
>+    Vector<VariableDeclaration>&& m_variableDeclarations;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTVariableReference.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTVariableReference.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..33b6fc61d5f8d13939aba9055ce937946f7f844f
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTVariableReference.h
>@@ -0,0 +1,85 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTAnonymousVariableDeclaration.h"
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLASTVariableDeclaration.h"
>+#include "WHLSLLexer.h"
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class VariableReference : public Expression {
>+public:
>+    VariableReference(Lexer::Token&& origin, String&& name)
>+        : Expression(WTFMove(origin))
>+        , m_name(WTFMove(name))
>+    {
>+    }
>+
>+    virtual ~VariableReference() = default;
>+
>+    VariableReference(const VariableReference&) = delete;
>+    VariableReference(VariableReference&&) = default;
>+
>+    static VariableReference wrap(VariableDeclaration& variableDeclaration)
>+    {
>+        VariableReference result(Lexer::Token(variableDeclaration.origin()));
>+        result.m_variable = { &variableDeclaration };
>+        return result;
>+    }
>+
>+    static VariableReference wrap(AnonymousVariableDeclaration& anonymousVariableDeclaration)
>+    {
>+        VariableReference result(Lexer::Token(anonymousVariableDeclaration.origin()));
>+        result.m_variable = { &anonymousVariableDeclaration };
>+        return result;
>+    }
>+
>+private:
>+    VariableReference(Lexer::Token&& origin)
>+        : Expression(WTFMove(origin))
>+    {
>+    }
>+
>+    String m_name;
>+    std::optional<Variant<VariableDeclaration*, AnonymousVariableDeclaration*>> m_variable;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTWhileLoop.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTWhileLoop.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..8aea2c1b2d9f98ed36fcd2b6ffdfa18ba7274839
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLASTWhileLoop.h
>@@ -0,0 +1,65 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLASTStatement.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+namespace AST {
>+
>+class WhileLoop : public Statement {
>+public:
>+    WhileLoop(Lexer::Token&& origin, std::unique_ptr<Expression>&& conditional, std::unique_ptr<Statement>&& body)
>+        : Statement(WTFMove(origin))
>+        , m_conditional(WTFMove(conditional))
>+        , m_body(WTFMove(body))
>+    {
>+    }
>+
>+    virtual ~WhileLoop() = default;
>+
>+    WhileLoop(const WhileLoop&) = delete;
>+    WhileLoop(WhileLoop&&) = default;
>+
>+private:
>+    std::unique_ptr<Expression> m_conditional;
>+    std::unique_ptr<Statement> m_body;
>+};
>+
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLLexer.cpp b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLLexer.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..d997e6346abeb8205fbf5347ada6986adf39dc1d
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLLexer.cpp
>@@ -0,0 +1,595 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "config.h"
>+#include "WHLSLLexer.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+auto Lexer::consumeTokenFromStream() -> std::optional<Token>
>+{
>+    auto prepare = [&](unsigned newOffset, Token::Type type) -> std::optional<Token> {
>+        auto offset = m_offset;
>+        m_offset = newOffset;
>+        skipWhitespaceAndComments();
>+        return {{ m_stringView.substring(offset, m_offset - offset), type }};
>+    };
>+
>+    if (auto newOffset = intLiteral(m_offset))
>+        return prepare(*newOffset, Token::Type::IntLiteral);
>+    if (auto newOffset = uintLiteral(m_offset))
>+        return prepare(*newOffset, Token::Type::UintLiteral);
>+    if (auto newOffset = floatLiteral(m_offset))
>+        return prepare(*newOffset, Token::Type::FloatLiteral);
>+    if (auto newOffset = string("struct", m_offset))
>+        return prepare(*newOffset, Token::Type::Struct);
>+    if (auto newOffset = string("typedef", m_offset))
>+        return prepare(*newOffset, Token::Type::Typedef);
>+    if (auto newOffset = string("enum", m_offset))
>+        return prepare(*newOffset, Token::Type::Enum);
>+    if (auto newOffset = string("operator", m_offset))
>+        return prepare(*newOffset, Token::Type::Operator);
>+    if (auto newOffset = string("if", m_offset))
>+        return prepare(*newOffset, Token::Type::If);
>+    if (auto newOffset = string("else", m_offset))
>+        return prepare(*newOffset, Token::Type::Else);
>+    if (auto newOffset = string("continue", m_offset))
>+        return prepare(*newOffset, Token::Type::Continue);
>+    if (auto newOffset = string("break", m_offset))
>+        return prepare(*newOffset, Token::Type::Break);
>+    if (auto newOffset = string("switch", m_offset))
>+        return prepare(*newOffset, Token::Type::Switch);
>+    if (auto newOffset = string("case", m_offset))
>+        return prepare(*newOffset, Token::Type::Case);
>+    if (auto newOffset = string("default", m_offset))
>+        return prepare(*newOffset, Token::Type::Default);
>+    if (auto newOffset = string("fallthrough", m_offset))
>+        return prepare(*newOffset, Token::Type::Fallthrough);
>+    if (auto newOffset = string("for", m_offset))
>+        return prepare(*newOffset, Token::Type::For);
>+    if (auto newOffset = string("while", m_offset))
>+        return prepare(*newOffset, Token::Type::While);
>+    if (auto newOffset = string("do", m_offset))
>+        return prepare(*newOffset, Token::Type::Do);
>+    if (auto newOffset = string("return", m_offset))
>+        return prepare(*newOffset, Token::Type::Return);
>+    if (auto newOffset = string("trap", m_offset))
>+        return prepare(*newOffset, Token::Type::Trap);
>+    if (auto newOffset = string("null", m_offset))
>+        return prepare(*newOffset, Token::Type::Null);
>+    if (auto newOffset = string("true", m_offset))
>+        return prepare(*newOffset, Token::Type::True);
>+    if (auto newOffset = string("false", m_offset))
>+        return prepare(*newOffset, Token::Type::False);
>+    if (auto newOffset = string("constant", m_offset))
>+        return prepare(*newOffset, Token::Type::Constant);
>+    if (auto newOffset = string("device", m_offset))
>+        return prepare(*newOffset, Token::Type::Device);
>+    if (auto newOffset = string("threadgroup", m_offset))
>+        return prepare(*newOffset, Token::Type::Threadgroup);
>+    if (auto newOffset = string("thread", m_offset))
>+        return prepare(*newOffset, Token::Type::Thread);
>+    if (auto newOffset = string("space", m_offset))
>+        return prepare(*newOffset, Token::Type::Space);
>+    if (auto newOffset = string("vertex", m_offset))
>+        return prepare(*newOffset, Token::Type::Vertex);
>+    if (auto newOffset = string("fragment", m_offset))
>+        return prepare(*newOffset, Token::Type::Fragment);
>+    if (auto newOffset = string("compute", m_offset))
>+        return prepare(*newOffset, Token::Type::Compute);
>+    if (auto newOffset = string("numthreads", m_offset))
>+        return prepare(*newOffset, Token::Type::NumThreads);
>+    if (auto newOffset = string("SV_InstanceID", m_offset))
>+        return prepare(*newOffset, Token::Type::SVInstanceID);
>+    if (auto newOffset = string("SV_VertexID", m_offset))
>+        return prepare(*newOffset, Token::Type::SVVertexID);
>+    if (auto newOffset = string("PSIZE", m_offset))
>+        return prepare(*newOffset, Token::Type::PSize);
>+    if (auto newOffset = string("SV_Position", m_offset))
>+        return prepare(*newOffset, Token::Type::SVPosition);
>+    if (auto newOffset = string("SV_IsFrontFace", m_offset))
>+        return prepare(*newOffset, Token::Type::SVIsFrontFace);
>+    if (auto newOffset = string("SV_SampleIndex", m_offset))
>+        return prepare(*newOffset, Token::Type::SVSampleIndex);
>+    if (auto newOffset = string("SV_InnerCoverage", m_offset))
>+        return prepare(*newOffset, Token::Type::SVInnerCoverage);
>+    if (auto newOffset = string("SV_Target", m_offset))
>+        return prepare(*newOffset, Token::Type::SVTarget);
>+    if (auto newOffset = string("SV_Depth", m_offset))
>+        return prepare(*newOffset, Token::Type::SVDepth);
>+    if (auto newOffset = string("SV_Coverage", m_offset))
>+        return prepare(*newOffset, Token::Type::SVCoverage);
>+    if (auto newOffset = string("SV_DispatchThreadID", m_offset))
>+        return prepare(*newOffset, Token::Type::SVDispatchThreadID);
>+    if (auto newOffset = string("SV_GroupID", m_offset))
>+        return prepare(*newOffset, Token::Type::SVGroupID);
>+    if (auto newOffset = string("SV_GroupIndex", m_offset))
>+        return prepare(*newOffset, Token::Type::SVGroupIndex);
>+    if (auto newOffset = string("SV_GroupThreadID", m_offset))
>+        return prepare(*newOffset, Token::Type::SVGroupThreadID);
>+    if (auto newOffset = string("attribute", m_offset))
>+        return prepare(*newOffset, Token::Type::Attribute);
>+    if (auto newOffset = string("register", m_offset))
>+        return prepare(*newOffset, Token::Type::Register);
>+    if (auto newOffset = string("specialized", m_offset))
>+        return prepare(*newOffset, Token::Type::Specialized);
>+    if (auto newOffset = string("native", m_offset))
>+        return prepare(*newOffset, Token::Type::Native);
>+    if (auto newOffset = string("restricted", m_offset))
>+        return prepare(*newOffset, Token::Type::Restricted);
>+    if (auto newOffset = string("_", m_offset))
>+        return prepare(*newOffset, Token::Type::Underscore);
>+    if (auto newOffset = string("auto", m_offset))
>+        return prepare(*newOffset, Token::Type::Auto);
>+    if (auto newOffset = string("protocol", m_offset))
>+        return prepare(*newOffset, Token::Type::Protocol);
>+    if (auto newOffset = string("const", m_offset))
>+        return prepare(*newOffset, Token::Type::Const);
>+    if (auto newOffset = string("static", m_offset))
>+        return prepare(*newOffset, Token::Type::Static);
>+    if (auto newOffset = qualifier(m_offset))
>+        return prepare(*newOffset, Token::Type::Qualifier);
>+    if (auto newOffset = identifier(m_offset))
>+        return prepare(*newOffset, Token::Type::Identifier);
>+    if (auto newOffset = operatorName(m_offset))
>+        return prepare(*newOffset, Token::Type::OperatorName);
>+    if (auto newOffset = string("=", m_offset))
>+        return prepare(*newOffset, Token::Type::EqualsSign);
>+    if (auto newOffset = string(";", m_offset))
>+        return prepare(*newOffset, Token::Type::Semicolon);
>+    if (auto newOffset = string("{", m_offset))
>+        return prepare(*newOffset, Token::Type::LeftCurlyBracket);
>+    if (auto newOffset = string("}", m_offset))
>+        return prepare(*newOffset, Token::Type::RightCurlyBracket);
>+    if (auto newOffset = string(":", m_offset))
>+        return prepare(*newOffset, Token::Type::Colon);
>+    if (auto newOffset = string(",", m_offset))
>+        return prepare(*newOffset, Token::Type::Comma);
>+    if (auto newOffset = string("(", m_offset))
>+        return prepare(*newOffset, Token::Type::LeftParenthesis);
>+    if (auto newOffset = string(")", m_offset))
>+        return prepare(*newOffset, Token::Type::RightParenthesis);
>+    if (auto newOffset = string("[]", m_offset))
>+        return prepare(*newOffset, Token::Type::SquareBracketPair);
>+    if (auto newOffset = string("[", m_offset))
>+        return prepare(*newOffset, Token::Type::LeftSquareBracket);
>+    if (auto newOffset = string("]", m_offset))
>+        return prepare(*newOffset, Token::Type::RightSquareBracket);
>+    if (auto newOffset = string("*", m_offset))
>+        return prepare(*newOffset, Token::Type::Star);
>+    if (auto newOffset = string("<", m_offset))
>+        return prepare(*newOffset, Token::Type::LessThanSign);
>+    if (auto newOffset = string(">", m_offset))
>+        return prepare(*newOffset, Token::Type::GreaterThanSign);
>+    if (auto newOffset = string(".", m_offset))
>+        return prepare(*newOffset, Token::Type::FullStop);
>+    if (auto newOffset = string("+=", m_offset))
>+        return prepare(*newOffset, Token::Type::PlusEquals);
>+    if (auto newOffset = string("-=", m_offset))
>+        return prepare(*newOffset, Token::Type::MinusEquals);
>+    if (auto newOffset = string("*=", m_offset))
>+        return prepare(*newOffset, Token::Type::TimesEquals);
>+    if (auto newOffset = string("/=", m_offset))
>+        return prepare(*newOffset, Token::Type::DivideEquals);
>+    if (auto newOffset = string("%=", m_offset))
>+        return prepare(*newOffset, Token::Type::ModEquals);
>+    if (auto newOffset = string("^=", m_offset))
>+        return prepare(*newOffset, Token::Type::XorEquals);
>+    if (auto newOffset = string("&=", m_offset))
>+        return prepare(*newOffset, Token::Type::AndEquals);
>+    if (auto newOffset = string("|=", m_offset))
>+        return prepare(*newOffset, Token::Type::OrEquals);
>+    if (auto newOffset = string(">>=", m_offset))
>+        return prepare(*newOffset, Token::Type::RightShiftEquals);
>+    if (auto newOffset = string("<<=", m_offset))
>+        return prepare(*newOffset, Token::Type::LeftShiftEquals);
>+    if (auto newOffset = string("++", m_offset))
>+        return prepare(*newOffset, Token::Type::PlusPlus);
>+    if (auto newOffset = string("--", m_offset))
>+        return prepare(*newOffset, Token::Type::MinusMinus);
>+    if (auto newOffset = string("->", m_offset))
>+        return prepare(*newOffset, Token::Type::Arrow);
>+    if (auto newOffset = string("?", m_offset))
>+        return prepare(*newOffset, Token::Type::QuestionMark);
>+    if (auto newOffset = string("||", m_offset))
>+        return prepare(*newOffset, Token::Type::OrOr);
>+    if (auto newOffset = string("&&", m_offset))
>+        return prepare(*newOffset, Token::Type::AndAnd);
>+    if (auto newOffset = string("|", m_offset))
>+        return prepare(*newOffset, Token::Type::Or);
>+    if (auto newOffset = string("^", m_offset))
>+        return prepare(*newOffset, Token::Type::Xor);
>+    if (auto newOffset = string("&", m_offset))
>+        return prepare(*newOffset, Token::Type::And);
>+    if (auto newOffset = string("<=", m_offset))
>+        return prepare(*newOffset, Token::Type::LessThanOrEqualTo);
>+    if (auto newOffset = string(">=", m_offset))
>+        return prepare(*newOffset, Token::Type::GreaterThanOrEqualTo);
>+    if (auto newOffset = string("==", m_offset))
>+        return prepare(*newOffset, Token::Type::EqualComparison);
>+    if (auto newOffset = string("!=", m_offset))
>+        return prepare(*newOffset, Token::Type::NotEqual);
>+    if (auto newOffset = string(">>", m_offset))
>+        return prepare(*newOffset, Token::Type::RightShift);
>+    if (auto newOffset = string("<<", m_offset))
>+        return prepare(*newOffset, Token::Type::LeftShift);
>+    if (auto newOffset = string("+", m_offset))
>+        return prepare(*newOffset, Token::Type::Plus);
>+    if (auto newOffset = string("-", m_offset))
>+        return prepare(*newOffset, Token::Type::Minus);
>+    if (auto newOffset = string("/", m_offset))
>+        return prepare(*newOffset, Token::Type::Divide);
>+    if (auto newOffset = string("%", m_offset))
>+        return prepare(*newOffset, Token::Type::Mod);
>+    if (auto newOffset = string("~", m_offset))
>+        return prepare(*newOffset, Token::Type::Tilde);
>+    if (auto newOffset = string("!", m_offset))
>+        return prepare(*newOffset, Token::Type::ExclamationPoint);
>+    if (auto newOffset = string("@", m_offset))
>+        return prepare(*newOffset, Token::Type::At);
>+
>+    skipWhitespaceAndComments();
>+    return std::nullopt;
>+}
>+
>+void Lexer::skipWhitespaceAndComments()
>+{
>+    unsigned savedOffset;
>+    do {
>+        savedOffset = m_offset;
>+        skipWhitespace();
>+        skipLineComment();
>+        skipLongComment();
>+    } while (savedOffset != m_offset);
>+}
>+
>+static inline bool isWhitespace(UChar codeUnit)
>+{
>+    switch (codeUnit) {
>+    case ' ':
>+    case '\t':
>+    case '\r':
>+    case '\n':
>+        return true;
>+    default:
>+        return false;
>+    }
>+}
>+
>+static inline bool isNewline(UChar codeUnit)
>+{
>+    switch (codeUnit) {
>+    case '\r':
>+    case '\n':
>+        return true;
>+    default:
>+        return false;
>+    }
>+}
>+
>+// We can take advantage of two properties of Unicode:
>+// 1. The consitutent UTF-16 code units for all non-BMP code points are surrogates,
>+//        which means we'll never see a false match. If we see a BMP code unit, we
>+//        really have a BMP code point.
>+// 2. Everything we're looking for is in BMP
>+
>+void Lexer::skipWhitespace()
>+{
>+    for ( ; m_offset < m_stringView.length() && isWhitespace(m_stringView[m_offset]); ++m_offset) { }
>+}
>+
>+void Lexer::skipLineComment()
>+{
>+    if (m_offset + 1 >= m_stringView.length() || m_stringView[m_offset] != '/' || m_stringView[m_offset + 1] != '/')
>+        return;
>+
>+    m_offset += 2;
>+    for ( ; m_offset < m_stringView.length() && !isNewline(m_stringView[m_offset]); ++m_offset) { }
>+}
>+
>+void Lexer::skipLongComment()
>+{
>+    if (m_offset + 1 >= m_stringView.length() || m_stringView[m_offset] != '/' || m_stringView[m_offset + 1] != '*')
>+        return;
>+
>+    m_offset += 2;
>+    do {
>+        for ( ; m_offset < m_stringView.length() && m_stringView[m_offset] != '*'; ++m_offset) { }
>+        if (m_offset < m_stringView.length())
>+            ++m_offset;
>+        if (m_offset < m_stringView.length() && m_stringView[m_offset] == '/') {
>+            ++m_offset;
>+            break;
>+        }
>+    } while (m_offset < m_stringView.length());
>+}
>+
>+// Regular expression are unnecessary; we shouldn't need to compile them.
>+
>+std::optional<unsigned> Lexer::coreDecimalIntLiteral(unsigned offset) const
>+{
>+    if (offset >= m_stringView.length())
>+        return std::nullopt;
>+    if (m_stringView[offset] == '0')
>+        return offset + 1;
>+    if (m_stringView[offset] >= '1' && m_stringView[offset] <= '9') {
>+        ++offset;
>+        for ( ; offset < m_stringView.length() && m_stringView[offset] >= '0' && m_stringView[offset] <= '9'; ++offset) {
>+        }
>+        return offset;
>+    }
>+    return std::nullopt;
>+}
>+
>+std::optional<unsigned> Lexer::decimalIntLiteral(unsigned offset) const
>+{
>+    if (offset < m_stringView.length() && m_stringView[offset] == '-')
>+        ++offset;
>+    return coreDecimalIntLiteral(offset);
>+}
>+
>+std::optional<unsigned> Lexer::decimalUintLiteral(unsigned offset) const
>+{
>+    auto result = coreDecimalIntLiteral(offset);
>+    if (!result)
>+        return std::nullopt;
>+    if (*result < m_stringView.length() && m_stringView[*result] == 'u')
>+        return *result + 1;
>+    return std::nullopt;
>+}
>+
>+static inline bool isHexadecimalCharacter(UChar character)
>+{
>+    return (character >= '0' && character <= '9')
>+        || (character >= 'a' && character <= 'f')
>+        || (character >= 'A' && character <= 'F');
>+}
>+
>+std::optional<unsigned> Lexer::coreHexadecimalIntLiteral(unsigned offset) const
>+{
>+    if (offset + 1 >= m_stringView.length() || m_stringView[offset] != '0' || m_stringView[offset + 1] != 'x')
>+        return std::nullopt;
>+
>+    offset += 2;
>+    if (offset >= m_stringView.length() || !isHexadecimalCharacter(m_stringView[offset]))
>+        return std::nullopt;
>+    ++offset;
>+    for ( ; offset < m_stringView.length() && isHexadecimalCharacter(m_stringView[offset]); ++offset) {
>+    }
>+    return offset;
>+}
>+
>+std::optional<unsigned> Lexer::hexadecimalIntLiteral(unsigned offset) const
>+{
>+    if (offset < m_stringView.length() && m_stringView[offset] == '-')
>+        ++offset;
>+    return coreHexadecimalIntLiteral(offset);
>+}
>+
>+std::optional<unsigned> Lexer::hexadecimalUintLiteral(unsigned offset) const
>+{
>+    auto result = coreHexadecimalIntLiteral(offset);
>+    if (!result)
>+        return std::nullopt;
>+    if (*result < m_stringView.length() && m_stringView[*result] == 'u')
>+        return *result + 1;
>+    return std::nullopt;
>+}
>+
>+std::optional<unsigned> Lexer::intLiteral(unsigned offset) const
>+{
>+    if (auto result = decimalIntLiteral(offset))
>+        return result;
>+    if (auto result = hexadecimalIntLiteral(offset))
>+        return result;
>+    return std::nullopt;
>+}
>+
>+std::optional<unsigned> Lexer::uintLiteral(unsigned offset) const
>+{
>+    if (auto result = decimalUintLiteral(offset))
>+        return result;
>+    if (auto result = hexadecimalUintLiteral(offset))
>+        return result;
>+    return std::nullopt;
>+}
>+
>+std::optional<unsigned> Lexer::digit(unsigned offset) const
>+{
>+    if (offset < m_stringView.length() && m_stringView[offset] >= '0' && m_stringView[offset] <= '9')
>+        return offset + 1;
>+    return std::nullopt;
>+}
>+
>+unsigned Lexer::digitStar(unsigned offset) const
>+{
>+    while (true) {
>+        auto result = digit(offset);
>+        if (!result)
>+            return offset;
>+        offset = *result;
>+    }
>+}
>+
>+std::optional<unsigned> Lexer::character(char character, unsigned offset) const
>+{
>+    if (offset < m_stringView.length() && m_stringView[offset] == character)
>+        return offset + 1;
>+    return std::nullopt;
>+}
>+
>+std::optional<unsigned> Lexer::coreFloatLiteralType1(unsigned offset) const
>+{
>+    auto result = digit(offset);
>+    if (!result)
>+        return std::nullopt;
>+    auto result2 = digitStar(*result);
>+    auto result3 = character('.', result2);
>+    if (!result3)
>+        return std::nullopt;
>+    return digitStar(*result3);
>+}
>+
>+std::optional<unsigned> Lexer::coreFloatLiteral(unsigned offset) const
>+{
>+    if (auto type1 = coreFloatLiteralType1(offset))
>+        return type1;
>+    auto result = digitStar(offset);
>+    auto result2 = character('.', result);
>+    if (!result2)
>+        return std::nullopt;
>+    auto result3 = digit(*result2);
>+    if (!result3)
>+        return std::nullopt;
>+    return digitStar(*result3);
>+}
>+
>+std::optional<unsigned> Lexer::floatLiteral(unsigned offset) const
>+{
>+    if (offset < m_stringView.length() && m_stringView[offset] == '-')
>+        ++offset;
>+    auto result = coreFloatLiteral(offset);
>+    if (!result)
>+        return std::nullopt;
>+    offset = *result;
>+    if (offset < m_stringView.length() && m_stringView[offset] == 'f')
>+        ++offset;
>+    return offset;
>+}
>+
>+std::optional<unsigned> Lexer::qualifier(unsigned offset) const
>+{
>+    if (auto result = string("nointerpolation", offset))
>+        return result;
>+    if (auto result = string("noperspective", offset))
>+        return result;
>+    if (auto result = string("uniform", offset))
>+        return result;
>+    if (auto result = string("centroid", offset))
>+        return result;
>+    if (auto result = string("sample", offset))
>+        return result;
>+    return std::nullopt;
>+}
>+
>+std::optional<unsigned> Lexer::validIdentifier(unsigned offset) const
>+{
>+    if (offset >= m_stringView.length()
>+        || !((m_stringView[offset] >= 'a' && m_stringView[offset] <= 'z')
>+            || (m_stringView[offset] >= 'A' && m_stringView[offset] <= 'Z')
>+            || (m_stringView[offset] == '_')))
>+        return std::nullopt;
>+    ++offset;
>+    while (true) {
>+        if (offset >= m_stringView.length()
>+            || !((m_stringView[offset] >= 'a' && m_stringView[offset] <= 'z')
>+                || (m_stringView[offset] >= 'A' && m_stringView[offset] <= 'Z')
>+                || (m_stringView[offset] >= '0' && m_stringView[offset] <= '9')
>+                || (m_stringView[offset] == '_')))
>+            return offset;
>+        ++offset;
>+    }
>+}
>+
>+std::optional<unsigned> Lexer::identifier(unsigned offset) const
>+{
>+    return validIdentifier(offset);
>+}
>+
>+std::optional<unsigned> Lexer::operatorName(unsigned offset) const
>+{
>+    if (auto result = string("operator&.", offset))
>+        return validIdentifier(*result);
>+    if (auto result = string("operator.", offset)) {
>+        if ((result = validIdentifier(*result))) {
>+            if (auto result2 = character('=', *result))
>+                return result2;
>+            return *result;
>+        }
>+    }
>+    if (auto result = string("operator", offset)) {
>+        if (auto result2 = string(">>", *result))
>+            return result2;
>+        if (auto result2 = string("<<", *result))
>+            return result2;
>+        if (auto result2 = string("++", *result))
>+            return result2;
>+        if (auto result2 = string("--", *result))
>+            return result2;
>+        if (auto result2 = string("+", *result))
>+            return result2;
>+        if (auto result2 = string("-", *result))
>+            return result2;
>+        if (auto result2 = string("*", *result))
>+            return result2;
>+        if (auto result2 = string("/", *result))
>+            return result2;
>+        if (auto result2 = string("%", *result))
>+            return result2;
>+        if (auto result2 = string("&&", *result))
>+            return result2;
>+        if (auto result2 = string("||", *result))
>+            return result2;
>+        if (auto result2 = string("&[]", *result))
>+            return result2;
>+        if (auto result2 = string("&", *result))
>+            return result2;
>+        if (auto result2 = string("^", *result))
>+            return result2;
>+        if (auto result2 = string("|", *result))
>+            return result2;
>+        if (auto result2 = string(">=", *result))
>+            return result2;
>+        if (auto result2 = string("<=", *result))
>+            return result2;
>+        if (auto result2 = string("==", *result))
>+            return result2;
>+        if (auto result2 = string("<", *result))
>+            return result2;
>+        if (auto result2 = string(">", *result))
>+            return result2;
>+        if (auto result2 = string("!", *result))
>+            return result2;
>+        if (auto result2 = string("~", *result))
>+            return result2;
>+        if (auto result2 = string("[]=", *result))
>+            return result2;
>+        if (auto result2 = string("[]", *result))
>+            return result2;
>+    }
>+    return std::nullopt;
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLLexer.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLLexer.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..81c3a50576a9da9f3e6b795ff607f1902d1e4e02
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLLexer.h
>@@ -0,0 +1,262 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include <wtf/Optional.h>
>+#include <wtf/Vector.h>
>+#include <wtf/text/StringView.h>
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+class Lexer {
>+public:
>+    Lexer(StringView stringView)
>+        : m_stringView(stringView)
>+    {
>+        skipWhitespaceAndComments();
>+    }
>+
>+    struct Token {
>+        Token() = delete;
>+        Token(const Token&) = default;
>+        Token(Token&&) = default;
>+        Token& operator=(const Token&) = default;
>+        Token& operator=(Token&&) = default;
>+
>+        StringView stringView;
>+        enum class Type {
>+            IntLiteral,
>+            UintLiteral,
>+            FloatLiteral,
>+            Struct,
>+            Typedef,
>+            Enum,
>+            Operator,
>+            If,
>+            Else,
>+            Continue,
>+            Break,
>+            Switch,
>+            Case,
>+            Default,
>+            Fallthrough,
>+            For,
>+            While,
>+            Do,
>+            Return,
>+            Trap,
>+            Null,
>+            True,
>+            False,
>+            Constant,
>+            Device,
>+            Threadgroup,
>+            Thread,
>+            Space,
>+            Vertex,
>+            Fragment,
>+            Compute,
>+            NumThreads,
>+            SVInstanceID,
>+            SVVertexID,
>+            PSize,
>+            SVPosition,
>+            SVIsFrontFace,
>+            SVSampleIndex,
>+            SVInnerCoverage,
>+            SVTarget,
>+            SVDepth,
>+            SVCoverage,
>+            SVDispatchThreadID,
>+            SVGroupID,
>+            SVGroupIndex,
>+            SVGroupThreadID,
>+            Attribute,
>+            Register,
>+            Specialized,
>+            Native,
>+            Restricted,
>+            Underscore,
>+            Auto,
>+            Protocol,
>+            Const,
>+            Static,
>+            Qualifier,
>+            Identifier,
>+            OperatorName,
>+            EqualsSign,
>+            Semicolon,
>+            LeftCurlyBracket,
>+            RightCurlyBracket,
>+            Colon,
>+            Comma,
>+            LeftParenthesis,
>+            RightParenthesis,
>+            SquareBracketPair,
>+            LeftSquareBracket,
>+            RightSquareBracket,
>+            Star,
>+            LessThanSign,
>+            GreaterThanSign,
>+            FullStop,
>+            PlusEquals,
>+            MinusEquals,
>+            TimesEquals,
>+            DivideEquals,
>+            ModEquals,
>+            XorEquals,
>+            AndEquals,
>+            OrEquals,
>+            RightShiftEquals,
>+            LeftShiftEquals,
>+            PlusPlus,
>+            MinusMinus,
>+            Arrow,
>+            QuestionMark,
>+            OrOr,
>+            AndAnd,
>+            Or,
>+            Xor,
>+            And,
>+            LessThanOrEqualTo,
>+            GreaterThanOrEqualTo,
>+            EqualComparison,
>+            NotEqual,
>+            RightShift,
>+            LeftShift,
>+            Plus,
>+            Minus,
>+            Divide,
>+            Mod,
>+            Tilde,
>+            ExclamationPoint,
>+            At,
>+        } type;
>+    };
>+
>+    std::optional<Token> consumeToken()
>+    {
>+        if (!m_stack.isEmpty())
>+            return m_stack.takeLast();
>+        return consumeTokenFromStream();
>+    }
>+
>+    void unconsumeToken(Token&& token)
>+    {
>+        m_stack.append(WTFMove(token));
>+    }
>+
>+    struct State {
>+        Vector<Token> stack;
>+        unsigned offset;
>+    };
>+
>+    State state() const
>+    {
>+        return { m_stack, m_offset };
>+    }
>+
>+    void setState(const State& state)
>+    {
>+        m_stack = state.stack;
>+        m_offset = state.offset;
>+    }
>+
>+    void setState(State&& state)
>+    {
>+        m_stack = WTFMove(state.stack);
>+        m_offset = WTFMove(state.offset);
>+    }
>+
>+    bool isFullyConsumed() const
>+    {
>+        return m_offset == m_stringView.length();
>+    }
>+
>+private:
>+    std::optional<Token> consumeTokenFromStream();
>+
>+    void skipWhitespaceAndComments();
>+    void skipWhitespace();
>+    void skipLineComment();
>+    void skipLongComment();
>+
>+    std::optional<unsigned> coreDecimalIntLiteral(unsigned) const;
>+    std::optional<unsigned> decimalIntLiteral(unsigned) const;
>+    std::optional<unsigned> decimalUintLiteral(unsigned) const;
>+    std::optional<unsigned> coreHexadecimalIntLiteral(unsigned) const;
>+    std::optional<unsigned> hexadecimalIntLiteral(unsigned) const;
>+    std::optional<unsigned> hexadecimalUintLiteral(unsigned) const;
>+    std::optional<unsigned> intLiteral(unsigned) const;
>+    std::optional<unsigned> uintLiteral(unsigned) const;
>+    std::optional<unsigned> digit(unsigned) const;
>+    unsigned digitStar(unsigned) const;
>+    std::optional<unsigned> character(char, unsigned) const;
>+    template<unsigned length> std::optional<unsigned> anyCharacter(const char (&string)[length], unsigned) const;
>+    std::optional<unsigned> coreFloatLiteralType1(unsigned) const;
>+    std::optional<unsigned> coreFloatLiteral(unsigned) const;
>+    std::optional<unsigned> floatLiteral(unsigned) const;
>+    template<unsigned length> std::optional<unsigned> string(const char (&string)[length], unsigned) const;
>+    std::optional<unsigned> qualifier(unsigned) const;
>+    std::optional<unsigned> validIdentifier(unsigned) const;
>+    std::optional<unsigned> identifier(unsigned) const;
>+    std::optional<unsigned> operatorName(unsigned) const;
>+
>+    const StringView m_stringView;
>+    Vector<Token> m_stack;
>+    unsigned m_offset { 0 };
>+};
>+
>+template<unsigned length> std::optional<unsigned> Lexer::string(const char (&string)[length], unsigned offset) const
>+{
>+    for (unsigned i = 0; i < length - 1; ++i) {
>+        if (i >= m_stringView.length() || m_stringView[i] != string[i])
>+            return std::nullopt;
>+    }
>+    return offset + length - 1;
>+}
>+
>+template<unsigned length> std::optional<unsigned> Lexer::anyCharacter(const char (&string)[length], unsigned offset) const
>+{
>+    if (offset >= m_stringView.length())
>+        return std::nullopt;
>+    for (unsigned i = 0; i < length - 1; ++i) {
>+        if (m_stringView[offset] == string[i])
>+            return offset + 1;
>+    }
>+    return std::nullopt;
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLParser.cpp b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLParser.cpp
>new file mode 100644
>index 0000000000000000000000000000000000000000..35f7caa9df38191ab7fabffe041513aca907f86f
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLParser.cpp
>@@ -0,0 +1,2574 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "config.h"
>+#include "WHLSLParser.h"
>+
>+#include "WHLSLASTArrayReferenceType.h"
>+#include "WHLSLASTArrayType.h"
>+#include "WHLSLASTAssignmentExpression.h"
>+#include "WHLSLASTBooleanLiteral.h"
>+#include "WHLSLASTBreak.h"
>+#include "WHLSLASTCallExpression.h"
>+#include "WHLSLASTCommaExpression.h"
>+#include "WHLSLASTContinue.h"
>+#include "WHLSLASTDereferenceExpression.h"
>+#include "WHLSLASTDotExpression.h"
>+#include "WHLSLASTEffectfulExpressionStatement.h"
>+#include "WHLSLASTFallthrough.h"
>+#include "WHLSLASTFloatLiteral.h"
>+#include "WHLSLASTIndexExpression.h"
>+#include "WHLSLASTIntegerLiteral.h"
>+#include "WHLSLASTLogicalExpression.h"
>+#include "WHLSLASTLogicalNotExpression.h"
>+#include "WHLSLASTMakeArrayReferenceExpression.h"
>+#include "WHLSLASTMakePointerExpression.h"
>+#include "WHLSLASTNullLiteral.h"
>+#include "WHLSLASTPointerType.h"
>+#include "WHLSLASTQualifier.h"
>+#include "WHLSLASTReadModifyWriteExpression.h"
>+#include "WHLSLASTReturn.h"
>+#include "WHLSLASTTernaryExpression.h"
>+#include "WHLSLASTTrap.h"
>+#include "WHLSLASTTypeReference.h"
>+#include "WHLSLASTUnsignedIntegerLiteral.h"
>+#include "WHLSLASTVariableReference.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+Parser::Parser(StringView stringView)
>+    : m_lexer(stringView)
>+{
>+}
>+
>+std::optional<Program> Parser::parse()
>+{
>+    Program result;
>+    while (!m_lexer.isFullyConsumed()) {
>+        if (peekType(Lexer::Token::Type::Semicolon)) {
>+            m_lexer.consumeToken();
>+            continue;
>+        }
>+
>+        auto typeDefinition = backtrackingScope<std::optional<AST::TypeDefinition>>([&]() -> std::optional<AST::TypeDefinition> {
>+            return parseTypeDefinition();
>+        });
>+        if (typeDefinition) {
>+            result.append(WTFMove(*typeDefinition));
>+            continue;
>+        }
>+
>+        auto structureDefinition = backtrackingScope<std::optional<AST::StructureDefinition>>([&]() -> std::optional<AST::StructureDefinition> {
>+            return parseStructureDefinition();
>+        });
>+        if (structureDefinition) {
>+            result.append(WTFMove(*structureDefinition));
>+            continue;
>+        }
>+
>+        auto enumerationDefinition = backtrackingScope<std::optional<AST::EnumerationDefinition>>([&]() -> std::optional<AST::EnumerationDefinition> {
>+            return parseEnumerationDefinition();
>+        });
>+        if (enumerationDefinition) {
>+            result.append(WTFMove(*enumerationDefinition));
>+            continue;
>+        }
>+
>+        auto nativeFunctionDeclaration = backtrackingScope<std::optional<AST::NativeFunctionDeclaration>>([&]() -> std::optional<AST::NativeFunctionDeclaration> {
>+            return parseNativeFunctionDeclaration();
>+        });
>+        if (nativeFunctionDeclaration) {
>+            result.append(WTFMove(*nativeFunctionDeclaration));
>+            continue;
>+        }
>+
>+        auto nativeTypeDeclaration = backtrackingScope<std::optional<AST::NativeTypeDeclaration>>([&]() -> std::optional<AST::NativeTypeDeclaration> {
>+            return parseNativeTypeDeclaration();
>+        });
>+        if (nativeTypeDeclaration) {
>+            result.append(WTFMove(*nativeTypeDeclaration));
>+            continue;
>+        }
>+
>+        return std::nullopt;
>+    }
>+    return result;
>+}
>+
>+std::optional<Lexer::Token> Parser::peek()
>+{
>+    if (auto token = m_lexer.consumeToken()) {
>+        m_lexer.unconsumeToken(Lexer::Token(*token));
>+        return token;
>+    }
>+    return std::nullopt;
>+}
>+
>+std::optional<Lexer::Token> Parser::peekType(Lexer::Token::Type type)
>+{
>+    if (auto token = m_lexer.consumeToken()) {
>+        m_lexer.unconsumeToken(Lexer::Token(*token));
>+        if (token->type == type)
>+            return token;
>+    }
>+    return std::nullopt;
>+}
>+
>+std::optional<Lexer::Token> Parser::peekTypes(Vector<Lexer::Token::Type> types)
>+{
>+    if (auto token = m_lexer.consumeToken()) {
>+        m_lexer.unconsumeToken(Lexer::Token(*token));
>+        if (std::find(types.begin(), types.end(), token->type) != types.end())
>+            return token;
>+    }
>+    return std::nullopt;
>+}
>+
>+std::optional<Lexer::Token> Parser::consumeType(Lexer::Token::Type type)
>+{
>+    if (auto token = m_lexer.consumeToken()) {
>+        if (token->type == type)
>+            return token;
>+    }
>+    return std::nullopt;
>+}
>+
>+std::optional<Lexer::Token> Parser::consumeTypes(Vector<Lexer::Token::Type> types)
>+{
>+    if (auto token = m_lexer.consumeToken()) {
>+        if (std::find(types.begin(), types.end(), token->type) != types.end())
>+            return token;
>+    }
>+    return std::nullopt;
>+}
>+
>+static int digitValue(UChar character)
>+{
>+    if (character >= '0' && character <= '9')
>+        return character - '0';
>+    if (character >= 'a' && character <= 'f')
>+        return character - 'a' + 10;
>+    return character - 'A' + 10;
>+}
>+
>+static std::optional<int> intLiteralToInt(StringView text)
>+{
>+    bool negate = false;
>+    if (text.startsWith(String("-", String::ConstructFromLiteral))) {
>+        negate = true;
>+        text = text.substring(1);
>+    }
>+    int base = 10;
>+    if (text.startsWith(String("0x", String::ConstructFromLiteral))) {
>+        text = text.substring(2);
>+        base = 16;
>+    }
>+
>+    int result = 0;
>+    for (unsigned i = 0; i < text.length(); ++i) {
>+        int digit = digitValue(text[i]);
>+        auto previous = result;
>+        result = result * base + digit;
>+        if (result < previous) // FIXME: overflow on signed integers is undefined
>+            return std::nullopt;
>+    }
>+    if (negate)
>+        result *= -1;
>+    // FIXME: This algorithm makes it impossible to represent 0x800000 (the most negative representable value)
>+    return { result };
>+}
>+
>+static std::optional<unsigned> uintLiteralToUint(StringView text)
>+{
>+    unsigned base = 10;
>+    if (text.startsWith(String("0x", String::ConstructFromLiteral))) {
>+        text = text.substring(2);
>+        base = 16;
>+    }
>+    ASSERT(text.substring(text.length() - 1) == "u");
>+    text = text.substring(0, text.length() - 1);
>+    unsigned result = 0;
>+    for (unsigned i = 0; i < text.length(); ++i) {
>+        unsigned digit = digitValue(text[i]);
>+        auto previous = result;
>+        result = result * base + digit;
>+        if (result < previous)
>+            return std::nullopt;
>+    }
>+    return { result };
>+}
>+
>+static std::optional<float> floatLiteralToFloat(StringView text)
>+{
>+    bool negate = false;
>+    if (text.length() > 0 && text[0] == '-') {
>+        negate = true;
>+        text = text.substring(1);
>+    }
>+    if (text.length() > 0 && text[text.length() - 1] == 'f')
>+        text = text.substring(0, text.length() - 1);
>+    float result;
>+    unsigned index = 0;
>+    for (index = 0; index < text.length() && text[index] != '.'; ++index) {
>+        ASSERT(text[index] >= 0 && text[index] <= 9);
>+        result = result * 10 + (text[index] - '0');
>+    }
>+    ASSERT(index < text.length());
>+    ASSERT(text[index] == '.');
>+    float decimal = 1.0f / 10.0f;
>+    for (++index; index < text.length(); ++index) {
>+        ASSERT(text[index] >= 0 && text[index] <= 9);
>+        result += decimal * (text[index] - '0');
>+        decimal /= 10.0f;
>+    }
>+    if (negate)
>+        result *= -1;
>+    return result;
>+}
>+
>+std::optional<Variant<int, unsigned>> Parser::consumeIntegralLiteral()
>+{
>+    auto integralLiteralToken = consumeTypes({ Lexer::Token::Type::IntLiteral, Lexer::Token::Type::UintLiteral });
>+    if (!integralLiteralToken)
>+        return std::nullopt;
>+
>+    switch (integralLiteralToken->type) {
>+    case Lexer::Token::Type::IntLiteral:
>+        if (auto result = intLiteralToInt(integralLiteralToken->stringView))
>+            return {{ *result }};
>+        return std::nullopt;
>+    case Lexer::Token::Type::UintLiteral:
>+        if (auto result = uintLiteralToUint(integralLiteralToken->stringView))
>+            return {{ *result }};
>+        return std::nullopt;
>+    default:
>+        ASSERT_NOT_REACHED();
>+    }
>+}
>+
>+std::optional<unsigned> Parser::consumeNonNegativeIntegralLiteral()
>+{
>+    auto integralLiteral = consumeIntegralLiteral();
>+    if (!integralLiteral)
>+        return std::nullopt;
>+    return WTF::visit(WTF::makeVisitor([](int x) -> std::optional<unsigned> {
>+        return x;
>+    }, [](unsigned x) -> std::optional<unsigned> {
>+        if (x < 0)
>+            return std::nullopt;
>+        return x;
>+    }), *integralLiteral);
>+}
>+
>+static std::optional<unsigned> recognizeSimpleUnsignedInteger(StringView stringView)
>+{
>+    unsigned result = 0;
>+    for (unsigned i = 0; i < stringView.length(); ++i) {
>+        if (stringView[i] < '0' || stringView[i] > '9')
>+            return std::nullopt;
>+        auto previous = result;
>+        result = result * 10 + (stringView[i] - '0');
>+        if (result < previous)
>+            return std::nullopt;
>+    }
>+    return result;
>+}
>+
>+std::optional<AST::ConstantExpression> Parser::parseConstantExpression()
>+{
>+    auto type = consumeTypes({
>+        Lexer::Token::Type::IntLiteral,
>+        Lexer::Token::Type::UintLiteral,
>+        Lexer::Token::Type::FloatLiteral,
>+        Lexer::Token::Type::Null,
>+        Lexer::Token::Type::True,
>+        Lexer::Token::Type::False,
>+        Lexer::Token::Type::Identifier,
>+    });
>+    if (!type)
>+        return std::nullopt;
>+
>+    switch (type->type) {
>+    case Lexer::Token::Type::IntLiteral: {
>+        auto value = intLiteralToInt(type->stringView);
>+        if (!value)
>+            return std::nullopt;
>+        return {{ AST::IntegerLiteral(WTFMove(*type), *value) }};
>+    }
>+    case Lexer::Token::Type::UintLiteral: {
>+        auto value = uintLiteralToUint(type->stringView);
>+        if (!value)
>+            return std::nullopt;
>+        return {{ AST::UnsignedIntegerLiteral(WTFMove(*type), *value) }};
>+    }
>+    case Lexer::Token::Type::FloatLiteral: {
>+        auto value = floatLiteralToFloat(type->stringView);
>+        if (!value)
>+            return std::nullopt;
>+        return {{ AST::FloatLiteral(WTFMove(*type), *value) }};
>+    }
>+    case Lexer::Token::Type::Null:
>+        return { AST::NullLiteral(WTFMove(*type)) };
>+    case Lexer::Token::Type::True:
>+        return { AST::BooleanLiteral(WTFMove(*type), true) };
>+    case Lexer::Token::Type::False:
>+        return { AST::BooleanLiteral(WTFMove(*type), false) };
>+    case Lexer::Token::Type::Identifier: {
>+        auto origin = consumeType(Lexer::Token::Type::FullStop);
>+        if (!origin)
>+            return std::nullopt;
>+        auto next = consumeType(Lexer::Token::Type::Identifier);
>+        if (!next)
>+            return std::nullopt;
>+        return { AST::ConstantExpressionEnumerationMemberReference(WTFMove(*origin), type->stringView.toString(), next->stringView.toString()) };
>+    }
>+    default:
>+        ASSERT_NOT_REACHED();
>+    }
>+}
>+
>+std::optional<AST::TypeArgument> Parser::parseTypeArgument()
>+{
>+    auto constantExpression = backtrackingScope<std::optional<AST::ConstantExpression>>([&]() -> std::optional<AST::ConstantExpression> {
>+        return parseConstantExpression();
>+    });
>+    if (constantExpression) {
>+        AST::TypeArgument result = WTFMove(*constantExpression);
>+        return result;
>+    }
>+    if (peekType(Lexer::Token::Type::Identifier))
>+        return { consumeType(Lexer::Token::Type::Identifier)->stringView.toString() };
>+    return std::nullopt;
>+}
>+
>+std::optional<AST::TypeArguments> Parser::parseTypeArguments()
>+{
>+    auto typeArguments = backtrackingScope<std::optional<AST::TypeArguments>>([&]() -> std::optional<AST::TypeArguments> {
>+        auto lessThanSign = consumeType(Lexer::Token::Type::LessThanSign);
>+        if (!lessThanSign)
>+            return std::nullopt;
>+        AST::TypeArguments typeArguments;
>+        auto typeArgument = parseTypeArgument();
>+        if (!typeArgument)
>+            return std::nullopt;
>+        typeArguments.append(WTFMove(*typeArgument));
>+        while (peekType(Lexer::Token::Type::Comma)) {
>+            consumeType(Lexer::Token::Type::Comma);
>+            auto typeArgument = parseTypeArgument();
>+            if (!typeArgument)
>+                return std::nullopt;
>+            typeArguments.append(WTFMove(*typeArgument));
>+        }
>+        auto greaterThanSign = consumeType(Lexer::Token::Type::GreaterThanSign);
>+        if (!greaterThanSign)
>+            return std::nullopt;
>+        return typeArguments;
>+    });
>+    if (typeArguments) {
>+        auto result = WTFMove(*typeArguments);
>+        return result;
>+    }
>+
>+    typeArguments = backtrackingScope<std::optional<AST::TypeArguments>>([&]() -> std::optional<AST::TypeArguments> {
>+        auto lessThanSign = consumeType(Lexer::Token::Type::LessThanSign);
>+        if (!lessThanSign)
>+            return std::nullopt;
>+        auto greaterThanSign = consumeType(Lexer::Token::Type::GreaterThanSign);
>+        if (!greaterThanSign)
>+            return std::nullopt;
>+        return {{ }};
>+    });
>+    if (typeArguments) {
>+        auto result = WTFMove(*typeArguments);
>+        return result;
>+    }
>+
>+    return {{ }};
>+}
>+
>+auto Parser::parseTypeSuffixAbbreviated() -> std::optional<TypeSuffixAbbreviated>
>+{
>+    auto token = consumeTypes({ Lexer::Token::Type::Star, Lexer::Token::Type::SquareBracketPair, Lexer::Token::Type::LeftSquareBracket });
>+    if (!token)
>+        return std::nullopt;
>+    if (token->type == Lexer::Token::Type::LeftSquareBracket) {
>+        auto numElements = consumeNonNegativeIntegralLiteral();
>+        if (!numElements)
>+            return std::nullopt;
>+        if (!consumeType(Lexer::Token::Type::RightSquareBracket))
>+            return std::nullopt;
>+        return {{ *token, *numElements }};
>+    }
>+    return {{ *token, std::nullopt }};
>+}
>+
>+auto Parser::parseTypeSuffixNonAbbreviated() -> std::optional<TypeSuffixNonAbbreviated>
>+{
>+    auto token = consumeTypes({ Lexer::Token::Type::Star, Lexer::Token::Type::SquareBracketPair, Lexer::Token::Type::LeftSquareBracket });
>+    if (!token)
>+        return std::nullopt;
>+    if (token->type == Lexer::Token::Type::LeftSquareBracket) {
>+        auto numElements = consumeNonNegativeIntegralLiteral();
>+        if (!numElements)
>+            return std::nullopt;
>+        if (!consumeType(Lexer::Token::Type::RightSquareBracket))
>+            return std::nullopt;
>+        return {{ *token, std::nullopt, *numElements }};
>+    }
>+    auto addressSpace = consumeTypes({ Lexer::Token::Type::Constant, Lexer::Token::Type::Device, Lexer::Token::Type::Threadgroup, Lexer::Token::Type::Thread});
>+    if (!addressSpace)
>+        return std::nullopt;
>+    return {{ *token, { *addressSpace }, std::nullopt }};
>+}
>+
>+std::unique_ptr<AST::Type> Parser::parseType()
>+{
>+    auto type = backtrackingScope<std::unique_ptr<AST::Type>>([&]() -> std::unique_ptr<AST::Type> {
>+        auto addressSpace = consumeTypes({ Lexer::Token::Type::Constant, Lexer::Token::Type::Device, Lexer::Token::Type::Threadgroup, Lexer::Token::Type::Thread});
>+        if (!addressSpace)
>+            return nullptr;
>+        auto name = consumeType(Lexer::Token::Type::Identifier);
>+        if (!name)
>+            return nullptr;
>+        auto typeArguments = parseTypeArguments();
>+        if (!typeArguments)
>+            return nullptr;
>+
>+        auto constructTypeFromSuffixAbbreviated = [&](TypeSuffixAbbreviated typeSuffixAbbreviated) -> std::function<std::unique_ptr<AST::Type>(std::unique_ptr<AST::Type>&&)> {
>+            switch (typeSuffixAbbreviated.token.type) {
>+            case Lexer::Token::Type::Star:
>+                return [=](std::unique_ptr<AST::Type>&& next) -> std::unique_ptr<AST::Type> {
>+                    return std::make_unique<AST::PointerType>(Lexer::Token(typeSuffixAbbreviated.token), addressSpace->stringView.toString(), WTFMove(next));
>+                };
>+            case Lexer::Token::Type::SquareBracketPair:
>+                return [=](std::unique_ptr<AST::Type>&& next) -> std::unique_ptr<AST::Type> {
>+                    return std::make_unique<AST::ArrayReferenceType>(Lexer::Token(typeSuffixAbbreviated.token), addressSpace->stringView.toString(), WTFMove(next));
>+                };
>+            case Lexer::Token::Type::LeftSquareBracket:
>+                return [=](std::unique_ptr<AST::Type>&& next) -> std::unique_ptr<AST::Type> {
>+                    return std::make_unique<AST::ArrayType>(Lexer::Token(typeSuffixAbbreviated.token), WTFMove(next), *typeSuffixAbbreviated.numElements);
>+                };
>+            default:
>+                ASSERT_NOT_REACHED();
>+            }
>+        };
>+
>+        // FIXME: Do this more elegantly
>+        Vector<std::function<std::unique_ptr<AST::Type>(std::unique_ptr<AST::Type>)>> builders;
>+        auto firstTypeSuffixAbbreviated = parseTypeSuffixAbbreviated();
>+        if (!firstTypeSuffixAbbreviated)
>+            return nullptr;
>+        builders.append(constructTypeFromSuffixAbbreviated(*firstTypeSuffixAbbreviated));
>+        while (true) {
>+            auto typeSuffixAbbreviated = backtrackingScope<std::optional<TypeSuffixAbbreviated>>([&]() -> std::optional<TypeSuffixAbbreviated> {
>+                return parseTypeSuffixAbbreviated();
>+            });
>+            if (!typeSuffixAbbreviated)
>+                break;
>+            builders.append(constructTypeFromSuffixAbbreviated(*typeSuffixAbbreviated));
>+        }
>+
>+        std::unique_ptr<AST::Type> result = std::make_unique<AST::TypeReference>(Lexer::Token(*addressSpace), name->stringView.toString(), WTFMove(*typeArguments));
>+        for (auto iter = builders.rbegin(); iter != builders.rend(); ++iter)
>+            result = (*iter)(WTFMove(result));
>+        return result;
>+    });
>+    if (type)
>+        return type;
>+
>+    type = backtrackingScope<std::unique_ptr<AST::Type>>([&]() -> std::unique_ptr<AST::Type> {
>+        auto origin = peek();
>+        auto name = consumeType(Lexer::Token::Type::Identifier);
>+        if (!name)
>+            return nullptr;
>+        auto typeArguments = parseTypeArguments();
>+        if (!typeArguments)
>+            return nullptr;
>+
>+        auto constructTypeFromSuffixNonAbbreviated = [&](TypeSuffixNonAbbreviated typeSuffixNonAbbreviated) -> std::function<std::unique_ptr<AST::Type>(std::unique_ptr<AST::Type>&&)> {
>+            switch (typeSuffixNonAbbreviated.token.type) {
>+            case Lexer::Token::Type::Star:
>+                return [=](std::unique_ptr<AST::Type>&& next) -> std::unique_ptr<AST::Type> {
>+                    return std::make_unique<AST::PointerType>(Lexer::Token(typeSuffixNonAbbreviated.token), typeSuffixNonAbbreviated.addressSpace->stringView.toString(), WTFMove(next));
>+                };
>+            case Lexer::Token::Type::SquareBracketPair:
>+                return [=](std::unique_ptr<AST::Type>&& next) -> std::unique_ptr<AST::Type> {
>+                    return std::make_unique<AST::ArrayReferenceType>(Lexer::Token(typeSuffixNonAbbreviated.token), typeSuffixNonAbbreviated.addressSpace->stringView.toString(), WTFMove(next));
>+                };
>+            case Lexer::Token::Type::LeftSquareBracket:
>+                return [=](std::unique_ptr<AST::Type>&& next) -> std::unique_ptr<AST::Type> {
>+                    return std::make_unique<AST::ArrayType>(Lexer::Token(typeSuffixNonAbbreviated.token), WTFMove(next), *typeSuffixNonAbbreviated.numElements);
>+                };
>+            default:
>+                ASSERT_NOT_REACHED();
>+            }
>+        };
>+
>+        Vector<std::function<std::unique_ptr<AST::Type>(std::unique_ptr<AST::Type>)>> builders;
>+        while (true) {
>+            auto typeSuffixNonAbbreviated = backtrackingScope<std::optional<TypeSuffixNonAbbreviated>>([&]() -> std::optional<TypeSuffixNonAbbreviated> {
>+                return parseTypeSuffixNonAbbreviated();
>+            });
>+            if (!typeSuffixNonAbbreviated)
>+                break;
>+            builders.append(constructTypeFromSuffixNonAbbreviated(*typeSuffixNonAbbreviated));
>+        }
>+
>+        std::unique_ptr<AST::Type> result = std::make_unique<AST::TypeReference>(WTFMove(*origin), name->stringView.toString(), WTFMove(*typeArguments));
>+        for (auto iter = builders.rbegin(); iter != builders.rend(); ++iter)
>+            result = (*iter)(WTFMove(result));
>+        return result;
>+    });
>+    if (type)
>+        return type;
>+
>+    return nullptr;
>+}
>+
>+std::optional<AST::TypeDefinition> Parser::parseTypeDefinition()
>+{
>+    auto origin = consumeType(Lexer::Token::Type::Typedef);
>+    if (!origin)
>+        return std::nullopt;
>+    auto name = consumeType(Lexer::Token::Type::Identifier);
>+    if (!name)
>+        return std::nullopt;
>+    if (!consumeType(Lexer::Token::Type::EqualsSign))
>+        return std::nullopt;
>+    auto type = parseType();
>+    if (!type)
>+        return std::nullopt;
>+    if (!consumeType(Lexer::Token::Type::Semicolon))
>+        return std::nullopt;
>+    return AST::TypeDefinition(WTFMove(*origin), name->stringView.toString(), WTFMove(type));
>+}
>+
>+std::optional<AST::BuiltInSemantic> Parser::parseBuiltInSemantic()
>+{
>+    auto origin = consumeTypes({
>+        Lexer::Token::Type::SVInstanceID,
>+        Lexer::Token::Type::SVVertexID,
>+        Lexer::Token::Type::PSize,
>+        Lexer::Token::Type::SVPosition,
>+        Lexer::Token::Type::SVIsFrontFace,
>+        Lexer::Token::Type::SVSampleIndex,
>+        Lexer::Token::Type::SVInnerCoverage,
>+        Lexer::Token::Type::SVTarget,
>+        Lexer::Token::Type::SVDepth,
>+        Lexer::Token::Type::SVCoverage,
>+        Lexer::Token::Type::SVDispatchThreadID,
>+        Lexer::Token::Type::SVGroupID,
>+        Lexer::Token::Type::SVGroupIndex,
>+        Lexer::Token::Type::SVGroupThreadID});
>+    if (!origin)
>+        return std::nullopt;
>+
>+    switch (origin->type) {
>+    case Lexer::Token::Type::SVInstanceID:
>+        return AST::BuiltInSemantic(WTFMove(*origin), AST::BuiltInSemantic::Variable::SVInstanceID);
>+    case Lexer::Token::Type::SVVertexID:
>+        return AST::BuiltInSemantic(WTFMove(*origin), AST::BuiltInSemantic::Variable::SVVertexID);
>+    case Lexer::Token::Type::PSize:
>+        return AST::BuiltInSemantic(WTFMove(*origin), AST::BuiltInSemantic::Variable::PSize);
>+    case Lexer::Token::Type::SVPosition:
>+        return AST::BuiltInSemantic(WTFMove(*origin), AST::BuiltInSemantic::Variable::SVPosition);
>+    case Lexer::Token::Type::SVIsFrontFace:
>+        return AST::BuiltInSemantic(WTFMove(*origin), AST::BuiltInSemantic::Variable::SVIsFrontFace);
>+    case Lexer::Token::Type::SVSampleIndex:
>+        return AST::BuiltInSemantic(WTFMove(*origin), AST::BuiltInSemantic::Variable::SVSampleIndex);
>+    case Lexer::Token::Type::SVInnerCoverage:
>+        return AST::BuiltInSemantic(WTFMove(*origin), AST::BuiltInSemantic::Variable::SVInnerCoverage);
>+    case Lexer::Token::Type::SVTarget: {
>+        auto target = consumeNonNegativeIntegralLiteral();
>+        if (!target)
>+            return std::nullopt;
>+        return AST::BuiltInSemantic(WTFMove(*origin), AST::BuiltInSemantic::Variable::SVTarget, *target);
>+    }
>+    case Lexer::Token::Type::SVDepth:
>+        return AST::BuiltInSemantic(WTFMove(*origin), AST::BuiltInSemantic::Variable::SVDepth);
>+    case Lexer::Token::Type::SVCoverage:
>+        return AST::BuiltInSemantic(WTFMove(*origin), AST::BuiltInSemantic::Variable::SVCoverage);
>+    case Lexer::Token::Type::SVDispatchThreadID:
>+        return AST::BuiltInSemantic(WTFMove(*origin), AST::BuiltInSemantic::Variable::SVDispatchThreadID);
>+    case Lexer::Token::Type::SVGroupID:
>+        return AST::BuiltInSemantic(WTFMove(*origin), AST::BuiltInSemantic::Variable::SVGroupID);
>+    case Lexer::Token::Type::SVGroupIndex:
>+        return AST::BuiltInSemantic(WTFMove(*origin), AST::BuiltInSemantic::Variable::SVGroupIndex);
>+    case Lexer::Token::Type::SVGroupThreadID:
>+        return AST::BuiltInSemantic(WTFMove(*origin), AST::BuiltInSemantic::Variable::SVGroupThreadID);
>+    default:
>+        ASSERT_NOT_REACHED();
>+    }
>+}
>+
>+std::optional<AST::ResourceSemantic> Parser::parseResourceSemantic()
>+{
>+    auto origin = consumeType(Lexer::Token::Type::Register);
>+    if (!origin)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::LeftParenthesis))
>+        return std::nullopt;
>+
>+    auto info = consumeType(Lexer::Token::Type::Identifier);
>+    if (!info)
>+        return std::nullopt;
>+    if (info->stringView.length() < 2 || (info->stringView[0] != 'u'
>+        && info->stringView[0] != 't'
>+        && info->stringView[0] != 'b'
>+        && info->stringView[0] != 's'))
>+        return std::nullopt;
>+    for (unsigned i = 1; i < info->stringView.length(); ++i) {
>+        if (info->stringView[i] < '0' || info->stringView[i] > '9')
>+            return std::nullopt;
>+    }
>+
>+    AST::ResourceSemantic::Mode mode;
>+    switch (info->stringView[0]) {
>+    case 'u':
>+        mode = AST::ResourceSemantic::Mode::UnorderedAccessView;
>+        break;
>+    case 't':
>+        mode = AST::ResourceSemantic::Mode::Texture;
>+        break;
>+    case 'b':
>+        mode = AST::ResourceSemantic::Mode::Buffer;
>+        break;
>+    case 's':
>+        mode = AST::ResourceSemantic::Mode::Sampler;
>+        break;
>+    }
>+
>+    auto index = recognizeSimpleUnsignedInteger(info->stringView.substring(1));
>+    if (!index)
>+        return std::nullopt;
>+
>+    unsigned space = 0;
>+    if (peekType(Lexer::Token::Type::Comma)) {
>+        consumeType(Lexer::Token::Type::Comma);
>+        auto spaceToken = consumeType(Lexer::Token::Type::Identifier);
>+        if (!spaceToken)
>+            return std::nullopt;
>+        auto prefix = String("space", String::ConstructFromLiteral);
>+        if (!spaceToken->stringView.startsWith(StringView(prefix)))
>+            return std::nullopt;
>+        if (spaceToken->stringView.length() <= prefix.length())
>+            return std::nullopt;
>+        for (unsigned i = prefix.length(); i < spaceToken->stringView.length(); ++i) {
>+            if (spaceToken->stringView[i] < '0' || spaceToken->stringView[i] > '9')
>+                return std::nullopt;
>+        }
>+        auto spaceValue = recognizeSimpleUnsignedInteger(spaceToken->stringView.substring(prefix.length()));
>+        if (!spaceValue)
>+            return std::nullopt;
>+        space = *spaceValue;
>+    }
>+
>+    if (!consumeType(Lexer::Token::Type::RightParenthesis))
>+        return std::nullopt;
>+
>+    return AST::ResourceSemantic(WTFMove(*origin), mode, *index, space);
>+}
>+
>+std::optional<AST::SpecializationConstantSemantic> Parser::parseSpecializationConstantSemantic()
>+{
>+    auto origin = consumeType(Lexer::Token::Type::Specialized);
>+    if (!origin)
>+        return std::nullopt;
>+    return AST::SpecializationConstantSemantic(WTFMove(*origin));
>+}
>+
>+std::optional<AST::StageInOutSemantic> Parser::parseStageInOutSemantic()
>+{
>+    auto origin = consumeType(Lexer::Token::Type::Attribute);
>+    if (!origin)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::LeftParenthesis))
>+        return std::nullopt;
>+
>+    auto index = consumeNonNegativeIntegralLiteral();
>+    if (!index)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::RightParenthesis))
>+        return std::nullopt;
>+
>+    return AST::StageInOutSemantic(WTFMove(*origin), *index);
>+}
>+
>+std::optional<AST::Semantic> Parser::parseSemantic()
>+{
>+    auto builtInSemantic = backtrackingScope<std::optional<AST::BuiltInSemantic>>([&]() -> std::optional<AST::BuiltInSemantic> {
>+        return parseBuiltInSemantic();
>+    });
>+    if (builtInSemantic) {
>+        AST::Semantic result = WTFMove(*builtInSemantic);
>+        return result;
>+    }
>+
>+    auto resourceSemantic = backtrackingScope<std::optional<AST::ResourceSemantic>>([&]() -> std::optional<AST::ResourceSemantic> {
>+        return parseResourceSemantic();
>+    });
>+    if (resourceSemantic) {
>+        AST::Semantic result = WTFMove(*resourceSemantic);
>+        return result;
>+    }
>+
>+    auto specializationConstantSemantic = backtrackingScope<std::optional<AST::SpecializationConstantSemantic>>([&]() -> std::optional<AST::SpecializationConstantSemantic> {
>+        return parseSpecializationConstantSemantic();
>+    });
>+    if (specializationConstantSemantic) {
>+        AST::Semantic result = WTFMove(*specializationConstantSemantic);
>+        return result;
>+    }
>+
>+    auto stageInOutSemantic = backtrackingScope<std::optional<AST::StageInOutSemantic>>([&]() -> std::optional<AST::StageInOutSemantic> {
>+        return parseStageInOutSemantic();
>+    });
>+    if (stageInOutSemantic) {
>+        AST::Semantic result = WTFMove(*stageInOutSemantic);
>+        return result;
>+    }
>+
>+    return std::nullopt;
>+}
>+
>+AST::Qualifiers Parser::parseQualifiers()
>+{
>+    AST::Qualifiers qualifiers;
>+    while (true) {
>+        if (auto next = peekType(Lexer::Token::Type::Qualifier)) {
>+            consumeType(Lexer::Token::Type::Qualifier);
>+            if ("nointerpolation" == next->stringView)
>+                qualifiers.append(AST::Qualifier::Nointerpolation);
>+            else if ("noperspective" == next->stringView)
>+                qualifiers.append(AST::Qualifier::Noperspective);
>+            else if ("uniform" == next->stringView)
>+                qualifiers.append(AST::Qualifier::Uniform);
>+            else if ("centroid" == next->stringView)
>+                qualifiers.append(AST::Qualifier::Centroid);
>+            else if ("sample" == next->stringView)
>+                qualifiers.append(AST::Qualifier::Sample);
>+            else
>+                ASSERT_NOT_REACHED();
>+        } else
>+            break;
>+    }
>+    return qualifiers;
>+}
>+
>+std::optional<AST::StructureElement> Parser::parseStructureElement()
>+{
>+    auto origin = peek();
>+    if (!origin)
>+        return std::nullopt;
>+
>+    AST::Qualifiers qualifiers = parseQualifiers();
>+
>+    if (!origin)
>+        return std::nullopt;
>+
>+    auto type = parseType();
>+    if (!type)
>+        return std::nullopt;
>+
>+    auto name = consumeType(Lexer::Token::Type::Identifier);
>+    if (!name)
>+        return std::nullopt;
>+
>+    if (peekType(Lexer::Token::Type::Colon)) {
>+        auto semantic = parseSemantic();
>+        if (!semantic)
>+            return std::nullopt;
>+
>+        if (!consumeType(Lexer::Token::Type::Semicolon))
>+            return std::nullopt;
>+
>+        return AST::StructureElement(WTFMove(*origin), WTFMove(qualifiers), WTFMove(type), name->stringView.toString(), WTFMove(*semantic));
>+    }
>+
>+    if (!consumeType(Lexer::Token::Type::Semicolon))
>+        return std::nullopt;
>+
>+    return AST::StructureElement(WTFMove(*origin), WTFMove(qualifiers), WTFMove(type), name->stringView.toString(), std::nullopt);
>+}
>+
>+std::optional<AST::StructureDefinition> Parser::parseStructureDefinition()
>+{
>+    auto origin = consumeType(Lexer::Token::Type::Struct);
>+    if (!origin)
>+        return std::nullopt;
>+
>+    auto name = consumeType(Lexer::Token::Type::Identifier);
>+    if (!name)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::LeftCurlyBracket))
>+        return std::nullopt;
>+
>+    AST::StructureElements structureElements;
>+    while (true) {
>+        auto structureElement = backtrackingScope<std::optional<AST::StructureElement>>([&]() -> std::optional<AST::StructureElement> {
>+            return parseStructureElement();
>+        });
>+        if (structureElement)
>+            structureElements.append(WTFMove(*structureElement));
>+        else
>+            break;
>+    }
>+
>+    if (!consumeType(Lexer::Token::Type::RightCurlyBracket))
>+        return std::nullopt;
>+
>+    return AST::StructureDefinition(WTFMove(*origin), name->stringView.toString(), WTFMove(structureElements));
>+}
>+
>+std::optional<AST::EnumerationDefinition> Parser::parseEnumerationDefinition()
>+{
>+    auto origin = consumeType(Lexer::Token::Type::Enum);
>+    if (!origin)
>+        return std::nullopt;
>+
>+    auto name = consumeType(Lexer::Token::Type::Identifier);
>+    if (!name)
>+        return std::nullopt;
>+
>+    std::unique_ptr<AST::Type> type;
>+    if (peekType(Lexer::Token::Type::Colon)) {
>+        type = parseType();
>+        if (!type)
>+            return std::nullopt;
>+    }
>+
>+    if (!consumeType(Lexer::Token::Type::LeftCurlyBracket))
>+        return std::nullopt;
>+
>+    auto firstEnumerationMember = parseEnumerationMember();
>+    if (!firstEnumerationMember)
>+        return std::nullopt;
>+
>+    Vector<AST::EnumerationMember> members;
>+    members.append(WTFMove(*firstEnumerationMember));
>+
>+    while (peekType(Lexer::Token::Type::Comma)) {
>+        consumeType(Lexer::Token::Type::Comma);
>+        auto member = parseEnumerationMember();
>+        if (!member)
>+            return std::nullopt;
>+        members.append(WTFMove(*member));
>+    }
>+
>+    if (!consumeType(Lexer::Token::Type::RightCurlyBracket))
>+        return std::nullopt;
>+
>+    return AST::EnumerationDefinition(WTFMove(*origin), name->stringView.toString(), WTFMove(type), WTFMove(members));
>+}
>+
>+std::optional<AST::EnumerationMember> Parser::parseEnumerationMember()
>+{
>+    auto identifier = consumeType(Lexer::Token::Type::Identifier);
>+    if (!identifier)
>+        return std::nullopt;
>+    auto name = identifier->stringView.toString();
>+
>+    if (peekType(Lexer::Token::Type::EqualsSign)) {
>+        consumeType(Lexer::Token::Type::EqualsSign);
>+        auto constantExpression = parseConstantExpression();
>+        if (!constantExpression)
>+            return std::nullopt;
>+        return AST::EnumerationMember(Lexer::Token(*identifier), WTFMove(name), WTFMove(*constantExpression));
>+    }
>+    return AST::EnumerationMember(Lexer::Token(*identifier), WTFMove(name));
>+}
>+
>+std::optional<AST::NativeTypeDeclaration> Parser::parseNativeTypeDeclaration()
>+{
>+    auto origin = consumeType(Lexer::Token::Type::Native);
>+    if (!origin)
>+        return std::nullopt;
>+    
>+    if (!consumeType(Lexer::Token::Type::Typedef))
>+        return std::nullopt;
>+
>+    auto name = consumeType(Lexer::Token::Type::Identifier);
>+    if (!name)
>+        return std::nullopt;
>+
>+    auto typeArguments = parseTypeArguments();
>+    if (!typeArguments)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::Semicolon))
>+        return std::nullopt;
>+
>+    return AST::NativeTypeDeclaration(WTFMove(*origin), name->stringView.toString(), WTFMove(*typeArguments));
>+}
>+
>+std::optional<AST::NumThreadsFunctionAttribute> Parser::parseNumThreadsFunctionAttribute()
>+{
>+    auto origin = consumeType(Lexer::Token::Type::NumThreads);
>+    if (!origin)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::LeftParenthesis))
>+        return std::nullopt;
>+
>+    auto width = consumeNonNegativeIntegralLiteral();
>+    if (!width)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::Comma))
>+        return std::nullopt;
>+
>+    auto height = consumeNonNegativeIntegralLiteral();
>+    if (!height)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::Comma))
>+        return std::nullopt;
>+
>+    auto depth = consumeNonNegativeIntegralLiteral();
>+    if (!depth)
>+        return std::nullopt;
>+    
>+    if (!consumeType(Lexer::Token::Type::RightParenthesis))
>+        return std::nullopt;
>+
>+    return AST::NumThreadsFunctionAttribute(WTFMove(*origin), *width, *height, *depth);
>+}
>+
>+std::optional<AST::AttributeBlock> Parser::parseAttributeBlock()
>+{
>+    if (!consumeType(Lexer::Token::Type::LeftSquareBracket))
>+        return std::nullopt;
>+
>+    AST::AttributeBlock result;
>+
>+    while (true) {
>+        auto numThreadsFunctionAttribute = backtrackingScope<std::optional<AST::NumThreadsFunctionAttribute>>([&]() -> std::optional<AST::NumThreadsFunctionAttribute> {
>+            return parseNumThreadsFunctionAttribute();
>+        });
>+        if (numThreadsFunctionAttribute) {
>+            result.append(WTFMove(*numThreadsFunctionAttribute));
>+            continue;
>+        }
>+
>+        break;
>+    }
>+
>+    if (!consumeType(Lexer::Token::Type::RightSquareBracket))
>+        return std::nullopt;
>+
>+    return result;
>+}
>+
>+std::optional<AST::Parameter> Parser::parseParameter()
>+{
>+    auto origin = peek();
>+    if (!origin)
>+        return std::nullopt;
>+
>+    AST::Qualifiers qualifiers = parseQualifiers();
>+
>+    auto type = parseType();
>+    if (!type)
>+        return std::nullopt;
>+
>+    std::optional<String> name;
>+    if (peekType(Lexer::Token::Type::Identifier)) {
>+        auto token = consumeType(Lexer::Token::Type::Identifier);
>+        name = token->stringView.toString();
>+    }
>+
>+    if (peekType(Lexer::Token::Type::Colon)) {
>+        auto semantic = parseSemantic();
>+        if (!semantic)
>+            return std::nullopt;
>+        return AST::Parameter(WTFMove(*origin), WTFMove(qualifiers), WTFMove(type), WTFMove(name), WTFMove(*semantic));
>+    }
>+
>+    return AST::Parameter(WTFMove(*origin), WTFMove(qualifiers), WTFMove(type), WTFMove(name), std::nullopt);
>+}
>+
>+std::optional<AST::Parameters> Parser::parseParameters()
>+{
>+    if (!consumeType(Lexer::Token::Type::LeftParenthesis))
>+        return std::nullopt;
>+
>+    if (peekType(Lexer::Token::Type::RightParenthesis)) {
>+        consumeType(Lexer::Token::Type::RightParenthesis);
>+        return {{ }};
>+    }
>+
>+    AST::Parameters parameters;
>+    auto firstParameter = parseParameter();
>+    if (!firstParameter)
>+        return std::nullopt;
>+    parameters.append(WTFMove(*firstParameter));
>+
>+    while (peekType(Lexer::Token::Type::Comma)) {
>+        consumeType(Lexer::Token::Type::Comma);
>+        auto parameter = parseParameter();
>+        if (!parameter)
>+            return std::nullopt;
>+        parameters.append(WTFMove(*parameter));
>+    }
>+
>+    return parameters;
>+}
>+
>+std::optional<AST::FunctionDefinition> Parser::parseFunctionDefinition()
>+{
>+    bool restricted = false;
>+    if (peekType(Lexer::Token::Type::Restricted)) {
>+        auto restrictedValue = consumeType(Lexer::Token::Type::Restricted);
>+        restricted = true;
>+    }
>+
>+    auto functionDeclaration = parseFunctionDeclaration();
>+    if (!functionDeclaration)
>+        return std::nullopt;
>+
>+    auto block = parseBlock();
>+    if (!block)
>+        return std::nullopt;
>+
>+    return AST::FunctionDefinition(WTFMove(*functionDeclaration), WTFMove(*block), restricted);
>+}
>+
>+std::optional<AST::FunctionDeclaration> Parser::parseEntryPointFunctionDeclaration()
>+{
>+    auto origin = peek();
>+    if (!origin)
>+        return std::nullopt;
>+
>+    AST::AttributeBlock attributeBlock;
>+    AST::FunctionDeclaration::EntryPointType entryPointType;
>+
>+    auto parsedAttributeBlock = backtrackingScope<std::optional<AST::AttributeBlock>>([&]() -> std::optional<AST::AttributeBlock> {
>+        return parseAttributeBlock();
>+    });
>+    if (parsedAttributeBlock) {
>+        if (!consumeType(Lexer::Token::Type::Compute))
>+            return std::nullopt;
>+        attributeBlock = WTFMove(*parsedAttributeBlock);
>+        entryPointType = AST::FunctionDeclaration::EntryPointType::Compute;
>+    } else {
>+        auto type = consumeTypes({ Lexer::Token::Type::Vertex, Lexer::Token::Type::Fragment });
>+        if (!type)
>+            return std::nullopt;
>+        
>+        switch (origin->type) {
>+        case Lexer::Token::Type::Vertex:
>+            entryPointType = AST::FunctionDeclaration::EntryPointType::Vertex;
>+            break;
>+        case Lexer::Token::Type::Fragment:
>+            entryPointType = AST::FunctionDeclaration::EntryPointType::Fragment;
>+            break;
>+        default:
>+            ASSERT_NOT_REACHED();
>+        }
>+    }
>+
>+    auto type = parseType();
>+    if (!type)
>+        return std::nullopt;
>+
>+    auto name = consumeType(Lexer::Token::Type::Identifier);
>+    if (!name)
>+        return std::nullopt;
>+
>+    auto parameters = parseParameters();
>+    if (!parameters)
>+        return std::nullopt;
>+
>+    if (peekType(Lexer::Token::Type::Colon)) {
>+        auto semantic = parseSemantic();
>+        if (!semantic)
>+            return std::nullopt;
>+        return AST::FunctionDeclaration(WTFMove(*origin), WTFMove(attributeBlock), entryPointType, WTFMove(type), name->stringView.toString(), WTFMove(*parameters), WTFMove(*semantic));
>+    }
>+
>+    return AST::FunctionDeclaration(WTFMove(*origin), WTFMove(attributeBlock), entryPointType, WTFMove(type), name->stringView.toString(), WTFMove(*parameters), std::nullopt);
>+}
>+
>+std::optional<AST::FunctionDeclaration> Parser::parseRegularFunctionDeclaration()
>+{
>+    auto origin = peek();
>+    if (!origin)
>+        return std::nullopt;
>+    
>+    auto type = parseType();
>+    if (!type)
>+        return std::nullopt;
>+
>+    auto name = consumeTypes({ Lexer::Token::Type::Identifier, Lexer::Token::Type::OperatorName });
>+    if (!name)
>+        return std::nullopt;
>+
>+    auto parameters = parseParameters();
>+    if (!parameters)
>+        return std::nullopt;
>+
>+    if (peekType(Lexer::Token::Type::Colon)) {
>+        auto semantic = parseSemantic();
>+        if (!semantic)
>+            return std::nullopt;
>+        return AST::FunctionDeclaration(WTFMove(*origin), { }, std::nullopt, WTFMove(type), name->stringView.toString(), WTFMove(*parameters), WTFMove(*semantic));
>+    }
>+
>+    return AST::FunctionDeclaration(WTFMove(*origin), { }, std::nullopt, WTFMove(type), name->stringView.toString(), WTFMove(*parameters), std::nullopt);
>+}
>+
>+std::optional<AST::FunctionDeclaration> Parser::parseOperatorFunctionDeclaration()
>+{
>+    auto origin = consumeType(Lexer::Token::Type::Operator);
>+    if (!origin)
>+        return std::nullopt;
>+    
>+    auto type = parseType();
>+    if (!type)
>+        return std::nullopt;
>+
>+    auto parameters = parseParameters();
>+    if (!parameters)
>+        return std::nullopt;
>+
>+    if (peekType(Lexer::Token::Type::Colon)) {
>+        auto semantic = parseSemantic();
>+        if (!semantic)
>+            return std::nullopt;
>+        return AST::FunctionDeclaration(WTFMove(*origin), { }, std::nullopt, WTFMove(type), String("Operator Cast", String::ConstructFromLiteral), WTFMove(*parameters), WTFMove(*semantic));
>+    }
>+
>+    return AST::FunctionDeclaration(WTFMove(*origin), { }, std::nullopt, WTFMove(type), String("Operator Cast", String::ConstructFromLiteral), WTFMove(*parameters), std::nullopt);
>+}
>+
>+std::optional<AST::FunctionDeclaration> Parser::parseFunctionDeclaration()
>+{
>+    auto entryPointFunctionDeclaration = backtrackingScope<std::optional<AST::FunctionDeclaration>>([&]() -> std::optional<AST::FunctionDeclaration> {
>+        return parseEntryPointFunctionDeclaration();
>+    });
>+    if (entryPointFunctionDeclaration) {
>+        auto result = WTFMove(*entryPointFunctionDeclaration);
>+        return result;
>+    }
>+
>+    auto regularFunctionDeclaration = backtrackingScope<std::optional<AST::FunctionDeclaration>>([&]() -> std::optional<AST::FunctionDeclaration> {
>+        return parseRegularFunctionDeclaration();
>+    });
>+    if (regularFunctionDeclaration) {
>+        auto result = WTFMove(*regularFunctionDeclaration);
>+        return result;
>+    }
>+
>+    auto operatorFunctionDeclaration = backtrackingScope<std::optional<AST::FunctionDeclaration>>([&]() -> std::optional<AST::FunctionDeclaration> {
>+        return parseOperatorFunctionDeclaration();
>+    });
>+    if (operatorFunctionDeclaration) {
>+        auto result = WTFMove(*operatorFunctionDeclaration);
>+        return result;
>+    }
>+
>+    return std::nullopt;
>+}
>+
>+std::optional<AST::NativeFunctionDeclaration> Parser::parseNativeFunctionDeclaration()
>+{
>+    std::optional<Lexer::Token> origin;
>+
>+    bool restricted = false;
>+    if (peekType(Lexer::Token::Type::Restricted)) {
>+        auto restrictedValue = consumeType(Lexer::Token::Type::Restricted);
>+        origin = *restrictedValue;
>+        restricted = true;
>+    }
>+
>+    auto native = consumeType(Lexer::Token::Type::Native);
>+    if (!native)
>+        return std::nullopt;
>+    if (!origin)
>+        origin = *native;
>+
>+    auto functionDeclaration = parseFunctionDeclaration();
>+    if (!functionDeclaration)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::Semicolon))
>+        return std::nullopt;
>+
>+    return AST::NativeFunctionDeclaration(functionDeclaration->takeOrigin(), functionDeclaration->takeAttributeBlock(), functionDeclaration->takeEntryPointType(), functionDeclaration->takeType(), functionDeclaration->takeName(), functionDeclaration->takeParameters(), functionDeclaration->takeSemantic(), restricted);
>+}
>+
>+std::optional<AST::Block> Parser::parseBlock()
>+{
>+    auto origin = consumeType(Lexer::Token::Type::LeftCurlyBracket);
>+    if (!origin)
>+        return std::nullopt;
>+
>+    auto result = parseBlockBody(WTFMove(*origin));
>+
>+    if (!consumeType(Lexer::Token::Type::RightCurlyBracket))
>+        return std::nullopt;
>+
>+    return result;
>+}
>+
>+AST::Block Parser::parseBlockBody(Lexer::Token&& origin)
>+{
>+    Vector<std::unique_ptr<AST::Statement>> statements;
>+    while (true) {
>+        auto statement = backtrackingScope<std::unique_ptr<AST::Statement>>([&]() -> std::unique_ptr<AST::Statement> {
>+            return parseStatement();
>+        });
>+        if (statement)
>+            statements.append(WTFMove(statement));
>+        else
>+            break;
>+    }
>+    return AST::Block(WTFMove(origin), WTFMove(statements));
>+}
>+
>+std::optional<AST::IfStatement> Parser::parseIfStatement()
>+{
>+    auto origin = consumeType(Lexer::Token::Type::If);
>+    if (!origin)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::LeftParenthesis))
>+        return std::nullopt;
>+
>+    auto conditional = parseExpression();
>+    if (!conditional)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::RightParenthesis))
>+        return std::nullopt;
>+
>+    auto body = parseStatement();
>+    if (!body)
>+        return std::nullopt;
>+
>+    std::unique_ptr<AST::Statement> elseBody;
>+    if (peekType(Lexer::Token::Type::Else)) {
>+        consumeType(Lexer::Token::Type::Else);
>+        elseBody = parseStatement();
>+        if (!elseBody)
>+            return std::nullopt;
>+    }
>+
>+    return AST::IfStatement(WTFMove(*origin), WTFMove(conditional), WTFMove(body), WTFMove(elseBody));
>+}
>+
>+std::optional<AST::SwitchStatement> Parser::parseSwitchStatement()
>+{
>+    auto origin = consumeType(Lexer::Token::Type::Switch);
>+    if (!origin)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::LeftParenthesis))
>+        return std::nullopt;
>+
>+    auto value = parseExpression();
>+    if (!value)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::RightParenthesis))
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::LeftCurlyBracket))
>+        return std::nullopt;
>+
>+    Vector<AST::SwitchCase> switchCases;
>+    while (true) {
>+        auto switchCase = backtrackingScope<std::optional<AST::SwitchCase>>([&]() -> std::optional<AST::SwitchCase> {
>+            return parseSwitchCase();
>+        });
>+        if (switchCase)
>+            switchCases.append(WTFMove(*switchCase));
>+        else
>+            break;
>+    }
>+
>+    return AST::SwitchStatement(WTFMove(*origin), WTFMove(value), WTFMove(switchCases));
>+}
>+
>+std::optional<AST::SwitchCase> Parser::parseSwitchCase()
>+{
>+    auto origin = consumeTypes({ Lexer::Token::Type::Case, Lexer::Token::Type::Default });
>+    if (!origin)
>+        return std::nullopt;
>+
>+    switch (origin->type) {
>+    case Lexer::Token::Type::Case: {
>+        auto value = parseConstantExpression();
>+        if (!value)
>+            return std::nullopt;
>+
>+        auto origin = consumeType(Lexer::Token::Type::Colon);
>+        if (!origin)
>+            return std::nullopt;
>+
>+        auto block = parseBlockBody(Lexer::Token(*origin));
>+
>+        return AST::SwitchCase(WTFMove(*origin), WTFMove(*value), WTFMove(block));
>+    }
>+    case Lexer::Token::Type::Default: {
>+        auto origin = consumeType(Lexer::Token::Type::Colon);
>+        if (!origin)
>+            return std::nullopt;
>+
>+        auto block = parseBlockBody(Lexer::Token(*origin));
>+
>+        return AST::SwitchCase(WTFMove(*origin), std::nullopt, WTFMove(block));
>+    }
>+    default:
>+        ASSERT_NOT_REACHED();
>+    }
>+}
>+
>+std::optional<AST::ForLoop> Parser::parseForLoop()
>+{
>+    auto origin = consumeType(Lexer::Token::Type::For);
>+    if (!origin)
>+        return std::nullopt;
>+
>+    auto parseRemainder = [&](Variant<AST::VariableDeclarationsStatement, std::unique_ptr<AST::Expression>>&& initialization) -> std::optional<AST::ForLoop> {
>+        if (!consumeType(Lexer::Token::Type::Semicolon))
>+            return std::nullopt;
>+
>+        auto condition = backtrackingScope<std::unique_ptr<AST::Expression>>([&]() -> std::unique_ptr<AST::Expression> {
>+            return parseExpression();
>+        });
>+
>+        if (!consumeType(Lexer::Token::Type::Semicolon))
>+            return std::nullopt;
>+
>+        auto increment = backtrackingScope<std::unique_ptr<AST::Expression>>([&]() -> std::unique_ptr<AST::Expression> {
>+            return parseExpression();
>+        });
>+
>+        if (!consumeType(Lexer::Token::Type::RightParenthesis))
>+            return std::nullopt;
>+
>+        auto body = parseStatement();
>+        if (!body)
>+            return std::nullopt;
>+
>+        return AST::ForLoop(WTFMove(*origin), WTFMove(initialization), WTFMove(condition), WTFMove(increment), WTFMove(body));
>+    };
>+
>+    if (!consumeType(Lexer::Token::Type::LeftParenthesis))
>+        return std::nullopt;
>+
>+    auto variableDeclarations = backtrackingScope<std::optional<AST::VariableDeclarationsStatement>>([&]() -> std::optional<AST::VariableDeclarationsStatement> {
>+        return parseVariableDeclarations();
>+    });
>+    if (variableDeclarations)
>+        return parseRemainder(WTFMove(*variableDeclarations));
>+
>+    auto effectfulExpression = parseEffectfulExpression();
>+    if (!effectfulExpression)
>+        return std::nullopt;
>+
>+    return parseRemainder(WTFMove(effectfulExpression));
>+}
>+
>+std::optional<AST::WhileLoop> Parser::parseWhileLoop()
>+{
>+    auto origin = consumeType(Lexer::Token::Type::While);
>+    if (!origin)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::LeftParenthesis))
>+        return std::nullopt;
>+
>+    auto conditional = parseExpression();
>+    if (!conditional)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::RightParenthesis))
>+        return std::nullopt;
>+
>+    auto body = parseStatement();
>+    if (!body)
>+        return std::nullopt;
>+
>+    return AST::WhileLoop(WTFMove(*origin), WTFMove(conditional), WTFMove(body));
>+}
>+
>+std::optional<AST::DoWhileLoop> Parser::parseDoWhileLoop()
>+{
>+    auto origin = consumeType(Lexer::Token::Type::Do);
>+    if (!origin)
>+        return std::nullopt;
>+
>+    auto body = parseStatement();
>+    if (!body)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::While))
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::LeftParenthesis))
>+        return std::nullopt;
>+
>+    auto conditional = parseExpression();
>+    if (!conditional)
>+        return std::nullopt;
>+
>+    if (!consumeType(Lexer::Token::Type::RightParenthesis))
>+        return std::nullopt;
>+
>+    return AST::DoWhileLoop(WTFMove(*origin), WTFMove(body), WTFMove(conditional));
>+}
>+
>+std::optional<AST::VariableDeclaration> Parser::parseVariableDeclaration(std::unique_ptr<AST::Type>&& type)
>+{
>+    auto origin = peek();
>+    if (!origin)
>+        return std::nullopt;
>+
>+    auto qualifiers = parseQualifiers();
>+
>+    auto name = consumeType(Lexer::Token::Type::Identifier);
>+    if (!name)
>+        return std::nullopt;
>+
>+    if (peekType(Lexer::Token::Type::Colon)) {
>+        auto semantic = parseSemantic();
>+        if (!semantic)
>+            return std::nullopt;
>+
>+        if (peekType(Lexer::Token::Type::EqualsSign)) {
>+            auto initializer = parseExpression();
>+            if (!initializer)
>+                return std::nullopt;
>+            return AST::VariableDeclaration(WTFMove(*origin), WTFMove(qualifiers), WTFMove(type), name->stringView.toString(), WTFMove(*semantic), WTFMove(initializer));
>+        }
>+
>+        return AST::VariableDeclaration(WTFMove(*origin), WTFMove(qualifiers), WTFMove(type), name->stringView.toString(), WTFMove(*semantic), nullptr);
>+    }
>+
>+    if (peekType(Lexer::Token::Type::EqualsSign)) {
>+        auto initializer = parseExpression();
>+        if (!initializer)
>+            return std::nullopt;
>+        return AST::VariableDeclaration(WTFMove(*origin), WTFMove(qualifiers), WTFMove(type), name->stringView.toString(), std::nullopt, WTFMove(initializer));
>+    }
>+
>+    return AST::VariableDeclaration(WTFMove(*origin), WTFMove(qualifiers), WTFMove(type), name->stringView.toString(), std::nullopt, nullptr);
>+}
>+
>+std::optional<AST::VariableDeclarationsStatement> Parser::parseVariableDeclarations()
>+{
>+    auto origin = peek();
>+    if (!origin)
>+        return std::nullopt;
>+
>+    auto type = parseType();
>+    if (!type)
>+        return std::nullopt;
>+
>+    auto firstVariableDeclaration = parseVariableDeclaration(std::unique_ptr<AST::Type>(type->clone()));
>+    if (!firstVariableDeclaration)
>+        return std::nullopt;
>+
>+    Vector<AST::VariableDeclaration> result;
>+    result.append(WTFMove(*firstVariableDeclaration));
>+
>+    while (peekType(Lexer::Token::Type::Comma)) {
>+        consumeType(Lexer::Token::Type::Comma);
>+        auto variableDeclaration = parseVariableDeclaration(std::unique_ptr<AST::Type>(type->clone()));
>+        if (!variableDeclaration)
>+            return std::nullopt;
>+        result.append(WTFMove(*variableDeclaration));
>+    }
>+
>+    return AST::VariableDeclarationsStatement(WTFMove(*origin), WTFMove(result));
>+}
>+
>+std::unique_ptr<AST::Statement> Parser::parseStatement()
>+{
>+    {
>+        auto block = backtrackingScope<std::optional<AST::Block>>([&]() -> std::optional<AST::Block> {
>+            return parseBlock();
>+        });
>+        if (block)
>+            return std::make_unique<AST::Block>(WTFMove(*block));
>+    }
>+
>+    {
>+        auto ifStatement = backtrackingScope<std::optional<AST::IfStatement>>([&]() -> std::optional<AST::IfStatement> {
>+            return parseIfStatement();
>+        });
>+        if (ifStatement)
>+            return std::make_unique<AST::IfStatement>(WTFMove(*ifStatement));
>+    }
>+
>+    {
>+        auto switchStatement = backtrackingScope<std::optional<AST::SwitchStatement>>([&]() -> std::optional<AST::SwitchStatement> {
>+            return parseSwitchStatement();
>+        });
>+        if (switchStatement)
>+            return std::make_unique<AST::SwitchStatement>(WTFMove(*switchStatement));
>+    }
>+
>+    {
>+        auto forLoop = backtrackingScope<std::optional<AST::ForLoop>>([&]() -> std::optional<AST::ForLoop> {
>+            return parseForLoop();
>+        });
>+        if (forLoop)
>+            return std::make_unique<AST::ForLoop>(WTFMove(*forLoop));
>+    }
>+
>+    {
>+        auto whileLoop = backtrackingScope<std::optional<AST::WhileLoop>>([&]() -> std::optional<AST::WhileLoop> {
>+            return parseWhileLoop();
>+        });
>+        if (whileLoop)
>+            return std::make_unique<AST::WhileLoop>(WTFMove(*whileLoop));
>+    }
>+
>+    {
>+        auto doWhileLoop = backtrackingScope<std::optional<AST::DoWhileLoop>>([&]() -> std::optional<AST::DoWhileLoop> {
>+            auto result = parseDoWhileLoop();
>+            if (!result)
>+                return std::nullopt;
>+            if (!consumeType(Lexer::Token::Type::Semicolon))
>+                return std::nullopt;
>+            return result;
>+        });
>+        if (doWhileLoop)
>+            return std::make_unique<AST::DoWhileLoop>(WTFMove(*doWhileLoop));
>+    }
>+
>+    {
>+        auto breakObject = backtrackingScope<std::optional<AST::Break>>([&]() -> std::optional<AST::Break> {
>+            auto origin = consumeType(Lexer::Token::Type::Break);
>+            if (!origin)
>+                return std::nullopt;
>+            if (!consumeType(Lexer::Token::Type::Semicolon))
>+                return std::nullopt;
>+            return AST::Break(WTFMove(*origin));
>+        });
>+        if (breakObject)
>+            return std::make_unique<AST::Break>(WTFMove(*breakObject));
>+    }
>+
>+    {
>+        auto continueObject = backtrackingScope<std::optional<AST::Continue>>([&]() -> std::optional<AST::Continue> {
>+            auto origin = consumeType(Lexer::Token::Type::Continue);
>+            if (!origin)
>+                return std::nullopt;
>+            if (!consumeType(Lexer::Token::Type::Semicolon))
>+                return std::nullopt;
>+            return AST::Continue(WTFMove(*origin));
>+        });
>+        if (continueObject)
>+            return std::make_unique<AST::Continue>(WTFMove(*continueObject));
>+    }
>+
>+    {
>+        auto fallthroughObject = backtrackingScope<std::optional<AST::Fallthrough>>([&]() -> std::optional<AST::Fallthrough> {
>+            auto origin = consumeType(Lexer::Token::Type::Fallthrough);
>+            if (!origin)
>+                return std::nullopt;
>+            if (!consumeType(Lexer::Token::Type::Semicolon))
>+                return std::nullopt;
>+            return AST::Fallthrough(WTFMove(*origin));
>+        });
>+        if (fallthroughObject)
>+            return std::make_unique<AST::Fallthrough>(WTFMove(*fallthroughObject));
>+    }
>+
>+    {
>+        auto trapObject = backtrackingScope<std::optional<AST::Trap>>([&]() -> std::optional<AST::Trap> {
>+            auto origin = consumeType(Lexer::Token::Type::Trap);
>+            if (!origin)
>+                return std::nullopt;
>+            if (!consumeType(Lexer::Token::Type::Semicolon))
>+                return std::nullopt;
>+            return AST::Trap(WTFMove(*origin));
>+        });
>+        if (trapObject)
>+            return std::make_unique<AST::Trap>(WTFMove(*trapObject));
>+    }
>+
>+    {
>+        auto returnObject = backtrackingScope<std::optional<AST::Return>>([&]() -> std::optional<AST::Return> {
>+            auto origin = consumeType(Lexer::Token::Type::Return);
>+            if (!origin)
>+                return std::nullopt;
>+            if (peekType(Lexer::Token::Type::Semicolon)) {
>+                consumeType(Lexer::Token::Type::Semicolon);
>+                return AST::Return(WTFMove(*origin), nullptr);
>+            }
>+            auto expression = parseExpression();
>+            if (!expression)
>+                return std::nullopt;
>+            if (!consumeType(Lexer::Token::Type::Semicolon))
>+                return std::nullopt;
>+            return AST::Return(WTFMove(*origin), WTFMove(expression));
>+        });
>+        if (returnObject)
>+            return std::make_unique<AST::Return>(WTFMove(*returnObject));
>+    }
>+
>+    {
>+        auto variableDeclarations = backtrackingScope<std::optional<AST::VariableDeclarationsStatement>>([&]() -> std::optional<AST::VariableDeclarationsStatement> {
>+            auto result = parseVariableDeclarations();
>+            if (!result)
>+                return std::nullopt;
>+            if (!consumeType(Lexer::Token::Type::Semicolon))
>+                return std::nullopt;
>+            return result;
>+        });
>+        if (variableDeclarations)
>+            return std::make_unique<AST::VariableDeclarationsStatement>(WTFMove(*variableDeclarations));
>+    }
>+
>+    {
>+        auto effectfulExpression = backtrackingScope<std::unique_ptr<AST::Expression>>([&]() -> std::unique_ptr<AST::Expression> {
>+            auto result = parseEffectfulExpression();
>+            if (!result)
>+                return nullptr;
>+            if (!consumeType(Lexer::Token::Type::Semicolon))
>+                return nullptr;
>+            return result;
>+        });
>+        if (effectfulExpression)
>+            return std::make_unique<AST::EffectfulExpressionStatement>(WTFMove(effectfulExpression));
>+    }
>+
>+    return nullptr;
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parseEffectfulExpression()
>+{
>+    auto origin = peek();
>+    if (!origin)
>+        return nullptr;
>+
>+    Vector<std::unique_ptr<AST::Expression>> expressions;
>+
>+    auto first = backtrackingScope<std::unique_ptr<AST::Expression>>([&]() -> std::unique_ptr<AST::Expression> {
>+        return parseEffectfulAssignment();
>+    });
>+    if (!first)
>+        return std::make_unique<AST::CommaExpression>(WTFMove(*origin), WTFMove(expressions));
>+
>+    expressions.append(WTFMove(first));
>+
>+    while (peekType(Lexer::Token::Type::Comma)) {
>+        consumeType(Lexer::Token::Type::Comma);
>+        auto expression = parseEffectfulAssignment();
>+        if (!expression)
>+            return nullptr;
>+        expressions.append(WTFMove(expression));
>+    }
>+
>+    if (expressions.size() == 1) {
>+        auto result = WTFMove(expressions[0]);
>+        return result;
>+    }
>+    return std::make_unique<AST::CommaExpression>(WTFMove(*origin), WTFMove(expressions));
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parseEffectfulAssignment()
>+{
>+    auto assignment = backtrackingScope<std::unique_ptr<AST::Expression>>([&]() -> std::unique_ptr<AST::Expression> {
>+        return parseAssignment();
>+    });
>+    if (assignment)
>+        return assignment;
>+
>+    assignment = backtrackingScope<std::unique_ptr<AST::Expression>>([&]() -> std::unique_ptr<AST::Expression> {
>+        return parseEffectfulPrefix();
>+    });
>+    if (assignment)
>+        return assignment;
>+
>+    return nullptr;
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parseEffectfulPrefix()
>+{
>+    auto prefix = consumeTypes({ Lexer::Token::Type::PlusPlus, Lexer::Token::Type::MinusMinus });
>+    if (!prefix)
>+        return nullptr;
>+
>+    auto previous = parsePossiblePrefix();
>+    if (!previous)
>+        return nullptr;
>+
>+    switch (prefix->type) {
>+    case Lexer::Token::Type::PlusPlus: {
>+        auto result = std::make_unique<AST::ReadModifyWriteExpression>(Lexer::Token(*prefix), WTFMove(previous));
>+        Vector<std::unique_ptr<AST::Expression>> callArguments;
>+        callArguments.append(result->oldVariableReference());
>+        result->setNewValueExpression(std::make_unique<AST::CallExpression>(WTFMove(*prefix), String("operator++", String::ConstructFromLiteral), WTFMove(callArguments)));
>+        result->setResultExpression(result->newVariableReference());
>+        return result;
>+    }
>+    case Lexer::Token::Type::MinusMinus: {
>+        auto result = std::make_unique<AST::ReadModifyWriteExpression>(Lexer::Token(*prefix), WTFMove(previous));
>+        Vector<std::unique_ptr<AST::Expression>> callArguments;
>+        callArguments.append(result->oldVariableReference());
>+        result->setNewValueExpression(std::make_unique<AST::CallExpression>(WTFMove(*prefix), String("operator--", String::ConstructFromLiteral), WTFMove(callArguments)));
>+        result->setResultExpression(result->newVariableReference());
>+        return result;
>+    }
>+    default:
>+        ASSERT_NOT_REACHED();
>+    }
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parseEffectfulSuffix()
>+{
>+    auto effectfulSuffix = backtrackingScope<std::unique_ptr<AST::Expression>>([&]() -> std::unique_ptr<AST::Expression> {
>+        auto previous = parsePossibleSuffix();
>+        if (!previous)
>+            return nullptr;
>+
>+        auto suffix = consumeTypes({ Lexer::Token::Type::PlusPlus, Lexer::Token::Type::MinusMinus });
>+        if (!suffix)
>+            return nullptr;
>+
>+        switch (suffix->type) {
>+        case Lexer::Token::Type::PlusPlus: {
>+            auto result = std::make_unique<AST::ReadModifyWriteExpression>(Lexer::Token(*suffix), WTFMove(previous));
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(result->oldVariableReference());
>+            result->setNewValueExpression(std::make_unique<AST::CallExpression>(WTFMove(*suffix), String("operator++", String::ConstructFromLiteral), WTFMove(callArguments)));
>+            result->setResultExpression(result->oldVariableReference());
>+            return result;
>+        }
>+        case Lexer::Token::Type::MinusMinus: {
>+            auto result = std::make_unique<AST::ReadModifyWriteExpression>(Lexer::Token(*suffix), WTFMove(previous));
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(result->oldVariableReference());
>+            result->setNewValueExpression(std::make_unique<AST::CallExpression>(WTFMove(*suffix), String("operator--", String::ConstructFromLiteral), WTFMove(callArguments)));
>+            result->setResultExpression(result->oldVariableReference());
>+            return result;
>+        }
>+        default:
>+            ASSERT_NOT_REACHED();
>+        }
>+    });
>+    if (effectfulSuffix)
>+        return effectfulSuffix;
>+
>+    effectfulSuffix = backtrackingScope<std::unique_ptr<AST::Expression>>([&]() -> std::unique_ptr<AST::Expression> {
>+        return parseCallExpression();
>+    });
>+    if (effectfulSuffix)
>+        return effectfulSuffix;
>+
>+    effectfulSuffix = backtrackingScope<std::unique_ptr<AST::Expression>>([&]() -> std::unique_ptr<AST::Expression> {
>+        if (!consumeType(Lexer::Token::Type::LeftParenthesis))
>+            return nullptr;
>+        auto expression = parseExpression();
>+        if (!expression)
>+            return nullptr;
>+        if (!consumeType(Lexer::Token::Type::RightParenthesis))
>+            return nullptr;
>+        return expression;
>+    });
>+    if (effectfulSuffix)
>+        return effectfulSuffix;
>+
>+    return nullptr;
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parseLimitedSuffixOperator(std::unique_ptr<AST::Expression>&& previous)
>+{
>+    auto type = consumeTypes({ Lexer::Token::Type::FullStop, Lexer::Token::Type::Arrow, Lexer::Token::Type::LeftSquareBracket });
>+    if (!type)
>+        return nullptr;
>+
>+    switch (type->type) {
>+    case Lexer::Token::Type::FullStop: {
>+        auto identifier = consumeType(Lexer::Token::Type::Identifier);
>+        if (!identifier)
>+            return nullptr;
>+        return std::make_unique<AST::DotExpression>(WTFMove(*type), WTFMove(previous), identifier->stringView.toString());
>+    }
>+    case Lexer::Token::Type::Arrow: {
>+        auto identifier = consumeType(Lexer::Token::Type::Identifier);
>+        if (!identifier)
>+            return nullptr;
>+        return std::make_unique<AST::DotExpression>(Lexer::Token(*type), std::make_unique<AST::DereferenceExpression>(WTFMove(*type), WTFMove(previous)), identifier->stringView.toString());
>+    }
>+    case Lexer::Token::Type::LeftSquareBracket: {
>+        auto expression = parseExpression();
>+        if (!expression)
>+            return nullptr;
>+        if (!consumeType(Lexer::Token::Type::RightSquareBracket))
>+            return nullptr;
>+        return std::make_unique<AST::IndexExpression>(WTFMove(*type), WTFMove(previous), WTFMove(expression));
>+    }
>+    default:
>+        ASSERT_NOT_REACHED();
>+    }
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parseSuffixOperator(std::unique_ptr<AST::Expression>&& previous)
>+{
>+    auto suffix = consumeTypes({ Lexer::Token::Type::FullStop, Lexer::Token::Type::Arrow, Lexer::Token::Type::LeftSquareBracket, Lexer::Token::Type::PlusPlus, Lexer::Token::Type::MinusMinus });
>+    if (!suffix)
>+        return nullptr;
>+
>+    switch (suffix->type) {
>+    case Lexer::Token::Type::FullStop: {
>+        auto identifier = consumeType(Lexer::Token::Type::Identifier);
>+        if (!identifier)
>+            return nullptr;
>+        return std::make_unique<AST::DotExpression>(WTFMove(*suffix), WTFMove(previous), identifier->stringView.toString());
>+    }
>+    case Lexer::Token::Type::Arrow: {
>+        auto identifier = consumeType(Lexer::Token::Type::Identifier);
>+        if (!identifier)
>+            return nullptr;
>+        return std::make_unique<AST::DotExpression>(Lexer::Token(*suffix), std::make_unique<AST::DereferenceExpression>(WTFMove(*suffix), WTFMove(previous)), identifier->stringView.toString());
>+    }
>+    case Lexer::Token::Type::LeftSquareBracket: {
>+        auto expression = parseExpression();
>+        if (!expression)
>+            return nullptr;
>+        if (!consumeType(Lexer::Token::Type::RightSquareBracket))
>+            return nullptr;
>+        return std::make_unique<AST::IndexExpression>(WTFMove(*suffix), WTFMove(previous), WTFMove(expression));
>+    }
>+    case Lexer::Token::Type::PlusPlus: {
>+        auto result = std::make_unique<AST::ReadModifyWriteExpression>(Lexer::Token(*suffix), WTFMove(previous));
>+        Vector<std::unique_ptr<AST::Expression>> callArguments;
>+        callArguments.append(result->oldVariableReference());
>+        result->setNewValueExpression(std::make_unique<AST::CallExpression>(WTFMove(*suffix), String("operator++", String::ConstructFromLiteral), WTFMove(callArguments)));
>+        result->setResultExpression(result->oldVariableReference());
>+        return result;
>+    }
>+    case Lexer::Token::Type::MinusMinus: {
>+        auto result = std::make_unique<AST::ReadModifyWriteExpression>(Lexer::Token(*suffix), WTFMove(previous));
>+        Vector<std::unique_ptr<AST::Expression>> callArguments;
>+        callArguments.append(result->oldVariableReference());
>+        result->setNewValueExpression(std::make_unique<AST::CallExpression>(WTFMove(*suffix), String("operator--", String::ConstructFromLiteral), WTFMove(callArguments)));
>+        result->setResultExpression(result->oldVariableReference());
>+        return result;
>+    }
>+    default:
>+        ASSERT_NOT_REACHED();
>+    }
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parseExpression()
>+{
>+    auto origin = peek();
>+    if (!origin)
>+        return nullptr;
>+
>+    auto first = parsePossibleTernaryConditional();
>+    if (!first)
>+        return nullptr;
>+
>+    Vector<std::unique_ptr<AST::Expression>> expressions;
>+    expressions.append(WTFMove(first));
>+
>+    while (peekType(Lexer::Token::Type::Comma)) {
>+        consumeType(Lexer::Token::Type::Comma);
>+        auto expression = parsePossibleTernaryConditional();
>+        if (!expression)
>+            return nullptr;
>+        expressions.append(WTFMove(expression));
>+    }
>+
>+    if (expressions.size() == 1) {
>+        auto result = WTFMove(expressions[0]);
>+        return result;
>+    }
>+    return std::make_unique<AST::CommaExpression>(WTFMove(*origin), WTFMove(expressions));
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parseTernaryConditional()
>+{
>+    auto origin = peek();
>+    if (!origin)
>+        return nullptr;
>+
>+    auto predicate = parsePossibleLogicalBinaryOperation();
>+    if (!predicate)
>+        return nullptr;
>+
>+    if (!consumeType(Lexer::Token::Type::QuestionMark))
>+        return nullptr;
>+
>+    auto bodyExpression = parseExpression();
>+    if (!bodyExpression)
>+        return nullptr;
>+
>+    if (!consumeType(Lexer::Token::Type::Colon))
>+        return nullptr;
>+
>+    auto elseExpression = parsePossibleTernaryConditional();
>+    if (!elseExpression)
>+        return nullptr;
>+
>+    // FIXME: Cast the predicate to a bool.
>+    return std::make_unique<AST::TernaryExpression>(WTFMove(*origin), WTFMove(predicate), WTFMove(bodyExpression), WTFMove(elseExpression));
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parseAssignment()
>+{
>+    auto origin = peek();
>+    if (!origin)
>+        return nullptr;
>+
>+    auto left = parsePossiblePrefix();
>+    if (!left)
>+        return nullptr;
>+
>+    auto assignmentOperator = consumeTypes({
>+        Lexer::Token::Type::EqualsSign,
>+        Lexer::Token::Type::PlusEquals,
>+        Lexer::Token::Type::MinusEquals,
>+        Lexer::Token::Type::TimesEquals,
>+        Lexer::Token::Type::DivideEquals,
>+        Lexer::Token::Type::ModEquals,
>+        Lexer::Token::Type::XorEquals,
>+        Lexer::Token::Type::AndEquals,
>+        Lexer::Token::Type::OrEquals,
>+        Lexer::Token::Type::RightShiftEquals,
>+        Lexer::Token::Type::LeftShiftEquals
>+    });
>+    if (!assignmentOperator)
>+        return nullptr;
>+
>+    auto right = parsePossibleTernaryConditional();
>+    if (!right)
>+        return nullptr;
>+
>+    if (assignmentOperator->type == Lexer::Token::Type::EqualsSign)
>+        return std::make_unique<AST::AssignmentExpression>(WTFMove(*origin), WTFMove(left), WTFMove(right));
>+
>+    String name;
>+    switch (assignmentOperator->type) {
>+    case Lexer::Token::Type::PlusEquals:
>+        name = String("operator+", String::ConstructFromLiteral);
>+        break;
>+    case Lexer::Token::Type::MinusEquals:
>+        name = String("operator-", String::ConstructFromLiteral);
>+        break;
>+    case Lexer::Token::Type::TimesEquals:
>+        name = String("operator*", String::ConstructFromLiteral);
>+        break;
>+    case Lexer::Token::Type::DivideEquals:
>+        name = String("operator/", String::ConstructFromLiteral);
>+        break;
>+    case Lexer::Token::Type::ModEquals:
>+        name = String("operator%", String::ConstructFromLiteral);
>+        break;
>+    case Lexer::Token::Type::XorEquals:
>+        name = String("operator^", String::ConstructFromLiteral);
>+        break;
>+    case Lexer::Token::Type::AndEquals:
>+        name = String("operator&", String::ConstructFromLiteral);
>+        break;
>+    case Lexer::Token::Type::OrEquals:
>+        name = String("operator|", String::ConstructFromLiteral);
>+        break;
>+    case Lexer::Token::Type::RightShiftEquals:
>+        name = String("operator>>", String::ConstructFromLiteral);
>+        break;
>+    case Lexer::Token::Type::LeftShiftEquals:
>+        name = String("operator<<", String::ConstructFromLiteral);
>+        break;
>+    default:
>+        ASSERT_NOT_REACHED();
>+    }
>+
>+    auto result = std::make_unique<AST::ReadModifyWriteExpression>(Lexer::Token(*origin), WTFMove(left));
>+    Vector<std::unique_ptr<AST::Expression>> callArguments;
>+    callArguments.append(result->oldVariableReference());
>+    callArguments.append(WTFMove(right));
>+    result->setNewValueExpression(std::make_unique<AST::CallExpression>(WTFMove(*origin), WTFMove(name), WTFMove(callArguments)));
>+    result->setResultExpression(result->newVariableReference());
>+    return result;
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parsePossibleTernaryConditional()
>+{
>+    auto ternaryExpression = backtrackingScope<std::unique_ptr<AST::Expression>>([&]() -> std::unique_ptr<AST::Expression> {
>+        return parseTernaryConditional();
>+    });
>+    if (ternaryExpression)
>+        return ternaryExpression;
>+
>+    auto assignmentExpression = backtrackingScope<std::unique_ptr<AST::Expression>>([&]() -> std::unique_ptr<AST::Expression> {
>+        return parseAssignment();
>+    });
>+    if (assignmentExpression)
>+        return assignmentExpression;
>+
>+    auto binaryOperation = backtrackingScope<std::unique_ptr<AST::Expression>>([&]() -> std::unique_ptr<AST::Expression> {
>+        return parsePossibleLogicalBinaryOperation();
>+    });
>+    if (binaryOperation)
>+        return binaryOperation;
>+
>+    return nullptr;
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parsePossibleLogicalBinaryOperation()
>+{
>+    auto previous = parsePossibleRelationalBinaryOperation();
>+    if (!previous)
>+        return nullptr;
>+
>+    while (peekTypes({
>+        Lexer::Token::Type::OrOr,
>+        Lexer::Token::Type::AndAnd,
>+        Lexer::Token::Type::Or,
>+        Lexer::Token::Type::Xor,
>+        Lexer::Token::Type::And
>+        })) {
>+        auto logicalBinaryOperation = consumeTypes({
>+            Lexer::Token::Type::OrOr,
>+            Lexer::Token::Type::AndAnd,
>+            Lexer::Token::Type::Or,
>+            Lexer::Token::Type::Xor,
>+            Lexer::Token::Type::And
>+        });
>+        
>+        auto next = parsePossibleRelationalBinaryOperation();
>+        if (!next)
>+            return nullptr;
>+
>+        switch (logicalBinaryOperation->type) {
>+        case Lexer::Token::Type::OrOr:
>+            previous = std::make_unique<AST::LogicalExpression>(WTFMove(*logicalBinaryOperation), AST::LogicalExpression::Type::Or, WTFMove(previous), WTFMove(next));
>+            break;
>+        case Lexer::Token::Type::AndAnd:
>+            previous = std::make_unique<AST::LogicalExpression>(WTFMove(*logicalBinaryOperation), AST::LogicalExpression::Type::And, WTFMove(previous), WTFMove(next));
>+            break;
>+        case Lexer::Token::Type::Or: {
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(WTFMove(previous));
>+            callArguments.append(WTFMove(next));
>+            previous = std::make_unique<AST::CallExpression>(WTFMove(*logicalBinaryOperation), String("operator|", String::ConstructFromLiteral), WTFMove(callArguments));
>+            break;
>+        }
>+        case Lexer::Token::Type::Xor: {
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(WTFMove(previous));
>+            callArguments.append(WTFMove(next));
>+            previous = std::make_unique<AST::CallExpression>(WTFMove(*logicalBinaryOperation), String("operator^", String::ConstructFromLiteral), WTFMove(callArguments));
>+            break;
>+        }
>+        case Lexer::Token::Type::And: {
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(WTFMove(previous));
>+            callArguments.append(WTFMove(next));
>+            previous = std::make_unique<AST::CallExpression>(WTFMove(*logicalBinaryOperation), String("operator&", String::ConstructFromLiteral), WTFMove(callArguments));
>+            break;
>+        }
>+        default:
>+            ASSERT_NOT_REACHED();
>+        }
>+    }
>+
>+    return previous;
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parsePossibleRelationalBinaryOperation()
>+{
>+    auto previous = parsePossibleShift();
>+    if (!previous)
>+        return nullptr;
>+
>+    while (peekTypes({
>+        Lexer::Token::Type::LessThanSign,
>+        Lexer::Token::Type::GreaterThanSign,
>+        Lexer::Token::Type::LessThanOrEqualTo,
>+        Lexer::Token::Type::GreaterThanOrEqualTo,
>+        Lexer::Token::Type::EqualComparison,
>+        Lexer::Token::Type::NotEqual
>+        })) {
>+        auto relationalBinaryOperation = consumeTypes({
>+            Lexer::Token::Type::LessThanSign,
>+            Lexer::Token::Type::GreaterThanSign,
>+            Lexer::Token::Type::LessThanOrEqualTo,
>+            Lexer::Token::Type::GreaterThanOrEqualTo,
>+            Lexer::Token::Type::EqualComparison,
>+            Lexer::Token::Type::NotEqual,
>+        });
>+        
>+        auto next = parsePossibleShift();
>+        if (!next)
>+            return nullptr;
>+
>+        switch (relationalBinaryOperation->type) {
>+        case Lexer::Token::Type::LessThanSign: {
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(WTFMove(previous));
>+            callArguments.append(WTFMove(next));
>+            previous = std::make_unique<AST::CallExpression>(WTFMove(*relationalBinaryOperation), String("operator<", String::ConstructFromLiteral), WTFMove(callArguments));
>+            break;
>+        }
>+        case Lexer::Token::Type::GreaterThanSign: {
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(WTFMove(previous));
>+            callArguments.append(WTFMove(next));
>+            previous = std::make_unique<AST::CallExpression>(WTFMove(*relationalBinaryOperation), String("operator>", String::ConstructFromLiteral), WTFMove(callArguments));
>+            break;
>+        }
>+        case Lexer::Token::Type::LessThanOrEqualTo: {
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(WTFMove(previous));
>+            callArguments.append(WTFMove(next));
>+            previous = std::make_unique<AST::CallExpression>(WTFMove(*relationalBinaryOperation), String("operator<=", String::ConstructFromLiteral), WTFMove(callArguments));
>+            break;
>+        }
>+        case Lexer::Token::Type::GreaterThanOrEqualTo: {
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(WTFMove(previous));
>+            callArguments.append(WTFMove(next));
>+            previous = std::make_unique<AST::CallExpression>(WTFMove(*relationalBinaryOperation), String("operator>=", String::ConstructFromLiteral), WTFMove(callArguments));
>+            break;
>+        }
>+        case Lexer::Token::Type::EqualComparison: {
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(WTFMove(previous));
>+            callArguments.append(WTFMove(next));
>+            previous = std::make_unique<AST::CallExpression>(WTFMove(*relationalBinaryOperation), String("operator==", String::ConstructFromLiteral), WTFMove(callArguments));
>+            break;
>+        }
>+        case Lexer::Token::Type::NotEqual: {
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(WTFMove(previous));
>+            callArguments.append(WTFMove(next));
>+            previous = std::make_unique<AST::CallExpression>(Lexer::Token(*relationalBinaryOperation), String("operator==", String::ConstructFromLiteral), WTFMove(callArguments));
>+            // FIXME: Cast the argument to a bool
>+            previous = std::make_unique<AST::LogicalNotExpression>(WTFMove(*relationalBinaryOperation), WTFMove(previous));
>+            break;
>+        }
>+        default:
>+            ASSERT_NOT_REACHED();
>+        }
>+    }
>+
>+    return previous;
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parsePossibleShift()
>+{
>+    auto previous = parsePossibleAdd();
>+    if (!previous)
>+        return nullptr;
>+
>+    while (peekTypes({
>+        Lexer::Token::Type::LeftShift,
>+        Lexer::Token::Type::RightShift
>+        })) {
>+        auto shift = consumeTypes({
>+            Lexer::Token::Type::LeftShift,
>+            Lexer::Token::Type::RightShift
>+        });
>+        
>+        auto next = parsePossibleAdd();
>+        if (!next)
>+            return nullptr;
>+
>+        switch (shift->type) {
>+        case Lexer::Token::Type::LeftShift: {
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(WTFMove(previous));
>+            callArguments.append(WTFMove(next));
>+            previous = std::make_unique<AST::CallExpression>(WTFMove(*shift), String("operator<<", String::ConstructFromLiteral), WTFMove(callArguments));
>+            break;
>+        }
>+        case Lexer::Token::Type::RightShift: {
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(WTFMove(previous));
>+            callArguments.append(WTFMove(next));
>+            previous = std::make_unique<AST::CallExpression>(WTFMove(*shift), String("operator>>", String::ConstructFromLiteral), WTFMove(callArguments));
>+            break;
>+        }
>+        default:
>+            ASSERT_NOT_REACHED();
>+        }
>+    }
>+
>+    return previous;
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parsePossibleAdd()
>+{
>+    auto previous = parsePossibleMultiply();
>+    if (!previous)
>+        return nullptr;
>+
>+    while (peekTypes({
>+        Lexer::Token::Type::Plus,
>+        Lexer::Token::Type::Minus
>+        })) {
>+        auto add = consumeTypes({
>+            Lexer::Token::Type::Plus,
>+            Lexer::Token::Type::Minus
>+        });
>+        
>+        auto next = parsePossibleMultiply();
>+        if (!next)
>+            return nullptr;
>+
>+        switch (add->type) {
>+        case Lexer::Token::Type::Plus: {
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(WTFMove(previous));
>+            callArguments.append(WTFMove(next));
>+            previous = std::make_unique<AST::CallExpression>(WTFMove(*add), String("operator+", String::ConstructFromLiteral), WTFMove(callArguments));
>+            break;
>+        }
>+        case Lexer::Token::Type::Minus: {
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(WTFMove(previous));
>+            callArguments.append(WTFMove(next));
>+            previous = std::make_unique<AST::CallExpression>(WTFMove(*add), String("operator-", String::ConstructFromLiteral), WTFMove(callArguments));
>+            break;
>+        }
>+        default:
>+            ASSERT_NOT_REACHED();
>+        }
>+    }
>+
>+    return previous;
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parsePossibleMultiply()
>+{
>+    auto previous = parsePossiblePrefix();
>+    if (!previous)
>+        return nullptr;
>+
>+    while (peekTypes({
>+        Lexer::Token::Type::Star,
>+        Lexer::Token::Type::Divide,
>+        Lexer::Token::Type::Mod
>+        })) {
>+        auto multiply = consumeTypes({
>+            Lexer::Token::Type::Star,
>+            Lexer::Token::Type::Divide,
>+            Lexer::Token::Type::Mod,
>+        });
>+        
>+        auto next = parsePossiblePrefix();
>+        if (!next)
>+            return nullptr;
>+
>+        switch (multiply->type) {
>+        case Lexer::Token::Type::Star: {
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(WTFMove(previous));
>+            callArguments.append(WTFMove(next));
>+            previous = std::make_unique<AST::CallExpression>(WTFMove(*multiply), String("operator*", String::ConstructFromLiteral), WTFMove(callArguments));
>+            break;
>+        }
>+        case Lexer::Token::Type::Divide: {
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(WTFMove(previous));
>+            callArguments.append(WTFMove(next));
>+            previous = std::make_unique<AST::CallExpression>(WTFMove(*multiply), String("operator/", String::ConstructFromLiteral), WTFMove(callArguments));
>+            break;
>+        }
>+        case Lexer::Token::Type::Mod: {
>+            Vector<std::unique_ptr<AST::Expression>> callArguments;
>+            callArguments.append(WTFMove(previous));
>+            callArguments.append(WTFMove(next));
>+            previous = std::make_unique<AST::CallExpression>(WTFMove(*multiply), String("operator%", String::ConstructFromLiteral), WTFMove(callArguments));
>+            break;
>+        }
>+        default:
>+            ASSERT_NOT_REACHED();
>+        }
>+    }
>+
>+    return previous;
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parsePossiblePrefix()
>+{
>+    // FIXME: Do this more elegantly
>+    Vector<std::function<std::unique_ptr<AST::Expression>(std::unique_ptr<AST::Expression>&&)>> builders;
>+    while (peekTypes({
>+        Lexer::Token::Type::PlusPlus,
>+        Lexer::Token::Type::MinusMinus,
>+        Lexer::Token::Type::Plus,
>+        Lexer::Token::Type::Minus,
>+        Lexer::Token::Type::Tilde,
>+        Lexer::Token::Type::ExclamationPoint,
>+        Lexer::Token::Type::And,
>+        Lexer::Token::Type::At,
>+        Lexer::Token::Type::Star
>+    })) {
>+        auto prefix = consumeTypes({
>+            Lexer::Token::Type::PlusPlus,
>+            Lexer::Token::Type::MinusMinus,
>+            Lexer::Token::Type::Plus,
>+            Lexer::Token::Type::Minus,
>+            Lexer::Token::Type::Tilde,
>+            Lexer::Token::Type::ExclamationPoint,
>+            Lexer::Token::Type::And,
>+            Lexer::Token::Type::At,
>+            Lexer::Token::Type::Star
>+        });
>+        
>+        switch (prefix->type) {
>+        case Lexer::Token::Type::PlusPlus: {
>+            auto builder = [=](std::unique_ptr<AST::Expression>&& previous) -> std::unique_ptr<AST::Expression> {
>+                auto result = std::make_unique<AST::ReadModifyWriteExpression>(Lexer::Token(*prefix), WTFMove(previous));
>+                Vector<std::unique_ptr<AST::Expression>> callArguments;
>+                callArguments.append(result->oldVariableReference());
>+                result->setNewValueExpression(std::make_unique<AST::CallExpression>(Lexer::Token(*prefix), String("operator++", String::ConstructFromLiteral), WTFMove(callArguments)));
>+                result->setResultExpression(result->newVariableReference());
>+                return result;
>+            };
>+            builders.append(WTFMove(builder));
>+            break;
>+        }
>+        case Lexer::Token::Type::MinusMinus: {
>+            auto builder = [=](std::unique_ptr<AST::Expression>&& previous) -> std::unique_ptr<AST::Expression> {
>+                auto result = std::make_unique<AST::ReadModifyWriteExpression>(Lexer::Token(*prefix), WTFMove(previous));
>+                Vector<std::unique_ptr<AST::Expression>> callArguments;
>+                callArguments.append(result->oldVariableReference());
>+                result->setNewValueExpression(std::make_unique<AST::CallExpression>(Lexer::Token(*prefix), String("operator--", String::ConstructFromLiteral), WTFMove(callArguments)));
>+                result->setResultExpression(result->newVariableReference());
>+                return result;
>+            };
>+            builders.append(WTFMove(builder));
>+            break;
>+        }
>+        case Lexer::Token::Type::Plus: {
>+            auto builder = [=](std::unique_ptr<AST::Expression>&& previous) -> std::unique_ptr<AST::Expression> {
>+                Vector<std::unique_ptr<AST::Expression>> callArguments;
>+                callArguments.append(WTFMove(previous));
>+                return std::make_unique<AST::CallExpression>(Lexer::Token(*prefix), String("operator+", String::ConstructFromLiteral), WTFMove(callArguments));
>+            };
>+            builders.append(WTFMove(builder));
>+            break;
>+        }
>+        case Lexer::Token::Type::Minus: {
>+            auto builder = [=](std::unique_ptr<AST::Expression>&& previous) -> std::unique_ptr<AST::Expression> {
>+                Vector<std::unique_ptr<AST::Expression>> callArguments;
>+                callArguments.append(WTFMove(previous));
>+                return std::make_unique<AST::CallExpression>(Lexer::Token(*prefix), String("operator-", String::ConstructFromLiteral), WTFMove(callArguments));
>+            };
>+            builders.append(WTFMove(builder));
>+            break;
>+        }
>+        case Lexer::Token::Type::Tilde: {
>+            auto builder = [=](std::unique_ptr<AST::Expression>&& previous) -> std::unique_ptr<AST::Expression> {
>+                Vector<std::unique_ptr<AST::Expression>> callArguments;
>+                callArguments.append(WTFMove(previous));
>+                return std::make_unique<AST::CallExpression>(Lexer::Token(*prefix), String("operator~", String::ConstructFromLiteral), WTFMove(callArguments));
>+            };
>+            builders.append(WTFMove(builder));
>+            break;
>+        }
>+        case Lexer::Token::Type::ExclamationPoint: {
>+            auto builder = [=](std::unique_ptr<AST::Expression>&& previous) -> std::unique_ptr<AST::Expression> {
>+                return std::make_unique<AST::LogicalNotExpression>(Lexer::Token(*prefix), WTFMove(previous));
>+            };
>+            builders.append(WTFMove(builder));
>+            break;
>+        }
>+        case Lexer::Token::Type::And: {
>+            auto builder = [=](std::unique_ptr<AST::Expression>&& previous) -> std::unique_ptr<AST::Expression> {
>+                return std::make_unique<AST::MakePointerExpression>(Lexer::Token(*prefix), WTFMove(previous));
>+            };
>+            builders.append(WTFMove(builder));
>+            break;
>+        }
>+        case Lexer::Token::Type::At: {
>+            auto builder = [=](std::unique_ptr<AST::Expression>&& previous) -> std::unique_ptr<AST::Expression> {
>+                return std::make_unique<AST::MakeArrayReferenceExpression>(Lexer::Token(*prefix), WTFMove(previous));
>+            };
>+            builders.append(WTFMove(builder));
>+            break;
>+        }
>+        case Lexer::Token::Type::Star: {
>+            auto builder = [=](std::unique_ptr<AST::Expression>&& previous) -> std::unique_ptr<AST::Expression> {
>+                return std::make_unique<AST::DereferenceExpression>(Lexer::Token(*prefix), WTFMove(previous));
>+            };
>+            builders.append(WTFMove(builder));
>+            break;
>+        }
>+        default:
>+            ASSERT_NOT_REACHED();
>+        }
>+    }
>+
>+    auto result = parsePossibleSuffix();
>+    if (!result)
>+        return nullptr;
>+
>+    for (auto builder = builders.rbegin(); builder != builders.rend(); ++builder)
>+        result = (*builder)(WTFMove(result));
>+
>+    return result;
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parsePossibleSuffix()
>+{
>+    auto suffix = backtrackingScope<std::unique_ptr<AST::Expression>>([&]() -> std::unique_ptr<AST::Expression> {
>+        auto expression = parseCallExpression();
>+        if (!expression)
>+            return nullptr;
>+        
>+        while (true) {
>+            expression = parseLimitedSuffixOperator(WTFMove(expression));
>+            if (!expression)
>+                return nullptr;
>+        }
>+        return expression;
>+    });
>+    if (suffix)
>+        return suffix;
>+
>+    suffix = backtrackingScope<std::unique_ptr<AST::Expression>>([&]() -> std::unique_ptr<AST::Expression> {
>+        auto expression = parseTerm();
>+        if (!expression)
>+            return nullptr;
>+        
>+        while (true) {
>+            expression = parseSuffixOperator(WTFMove(expression));
>+            if (!expression)
>+                return nullptr;
>+        }
>+        return expression;
>+    });
>+    if (suffix)
>+        return suffix;
>+
>+    return nullptr;
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parseCallExpression()
>+{
>+    auto name = consumeType(Lexer::Token::Type::Identifier);
>+    if (!name)
>+        return nullptr;
>+    auto callName = name->stringView.toString();
>+
>+    if (!consumeType(Lexer::Token::Type::LeftParenthesis))
>+        return nullptr;
>+
>+    Vector<std::unique_ptr<AST::Expression>> arguments;
>+    if (peekType(Lexer::Token::Type::RightParenthesis)) {
>+        consumeType(Lexer::Token::Type::RightParenthesis);
>+        return std::make_unique<AST::CallExpression>(WTFMove(*name), WTFMove(callName), WTFMove(arguments));
>+    }
>+
>+    auto firstArgument = parsePossibleTernaryConditional();
>+    if (!firstArgument)
>+        return nullptr;
>+    arguments.append(WTFMove(firstArgument));
>+    while (peekType(Lexer::Token::Type::Comma)) {
>+        consumeType(Lexer::Token::Type::Comma);
>+        auto argument = parsePossibleTernaryConditional();
>+        if (!argument)
>+            return nullptr;
>+        arguments.append(WTFMove(argument));
>+    }
>+    return std::make_unique<AST::CallExpression>(WTFMove(*name), WTFMove(callName), WTFMove(arguments));
>+}
>+
>+std::unique_ptr<AST::Expression> Parser::parseTerm()
>+{
>+    auto type = consumeTypes({
>+        Lexer::Token::Type::IntLiteral,
>+        Lexer::Token::Type::UintLiteral,
>+        Lexer::Token::Type::FloatLiteral,
>+        Lexer::Token::Type::Null,
>+        Lexer::Token::Type::True,
>+        Lexer::Token::Type::False,
>+        Lexer::Token::Type::Identifier,
>+        Lexer::Token::Type::LeftParenthesis
>+    });
>+    if (!type)
>+        return nullptr;
>+
>+    switch (type->type) {
>+    case Lexer::Token::Type::IntLiteral: {
>+        auto value = intLiteralToInt(type->stringView);
>+        if (!value)
>+            return nullptr;
>+        return std::make_unique<AST::IntegerLiteral>(WTFMove(*type), *value);
>+    }
>+    case Lexer::Token::Type::UintLiteral: {
>+        auto value = uintLiteralToUint(type->stringView);
>+        if (!value)
>+            return nullptr;
>+        return std::make_unique<AST::UnsignedIntegerLiteral>(WTFMove(*type), *value);
>+    }
>+    case Lexer::Token::Type::FloatLiteral: {
>+        auto value = floatLiteralToFloat(type->stringView);
>+        if (!value)
>+            return nullptr;
>+        return std::make_unique<AST::FloatLiteral>(WTFMove(*type), *value);
>+    }
>+    case Lexer::Token::Type::Null:
>+        return std::make_unique<AST::NullLiteral>(WTFMove(*type));
>+    case Lexer::Token::Type::True:
>+        return std::make_unique<AST::BooleanLiteral>(WTFMove(*type), true);
>+    case Lexer::Token::Type::False:
>+        return std::make_unique<AST::BooleanLiteral>(WTFMove(*type), false);
>+    case Lexer::Token::Type::Identifier: {
>+        auto name = type->stringView.toString();
>+        return std::make_unique<AST::VariableReference>(WTFMove(*type), WTFMove(name));
>+    }
>+    case Lexer::Token::Type::LeftParenthesis: {
>+        auto expression = parseExpression();
>+        if (!expression)
>+            return nullptr;
>+        if (!consumeType(Lexer::Token::Type::RightParenthesis))
>+            return nullptr;
>+        return expression;
>+    }
>+    default:
>+        ASSERT_NOT_REACHED();
>+    }
>+}
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLParser.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLParser.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..5cb41edb3dcca9f7e954b06786ea981affe8a67b
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLParser.h
>@@ -0,0 +1,170 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTBlock.h"
>+#include "WHLSLASTCommaExpression.h"
>+#include "WHLSLASTConstantExpression.h"
>+#include "WHLSLASTDoWhileLoop.h"
>+#include "WHLSLASTExpression.h"
>+#include "WHLSLASTForLoop.h"
>+#include "WHLSLASTFunctionAttribute.h"
>+#include "WHLSLASTFunctionDeclaration.h"
>+#include "WHLSLASTFunctionDefinition.h"
>+#include "WHLSLASTIfStatement.h"
>+#include "WHLSLASTNativeTypeDeclaration.h"
>+#include "WHLSLASTParameter.h"
>+#include "WHLSLASTSemantic.h"
>+#include "WHLSLASTStatement.h"
>+#include "WHLSLASTStructureDefinition.h"
>+#include "WHLSLASTStructureElement.h"
>+#include "WHLSLASTSwitchCase.h"
>+#include "WHLSLASTSwitchStatement.h"
>+#include "WHLSLASTTypeArgument.h"
>+#include "WHLSLASTTypeDefinition.h"
>+#include "WHLSLASTVariableDeclaration.h"
>+#include "WHLSLASTVariableDeclarationsStatement.h"
>+#include "WHLSLASTWhileLoop.h"
>+#include "WHLSLLexer.h"
>+#include "WHLSLProgram.h"
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+class Parser {
>+public:
>+    Parser(StringView);
>+
>+    std::optional<Program> parse();
>+
>+private:
>+    template<typename T> T backtrackingScope(std::function<T()> callback)
>+    {
>+        auto state = m_lexer.state();
>+        if (auto result = callback())
>+            return result;
>+        m_lexer.setState(WTFMove(state));
>+        return { };
>+    }
>+
>+    template<typename T> bool testScope(std::function<T()> callback)
>+    {
>+        auto state = m_lexer.state();
>+        bool result = callback();
>+        m_lexer.setState(WTFMove(state));
>+        return result;
>+    }
>+
>+    std::optional<Lexer::Token> peek();
>+    std::optional<Lexer::Token> peekType(Lexer::Token::Type);
>+    std::optional<Lexer::Token> peekTypes(Vector<Lexer::Token::Type>);
>+    std::optional<Lexer::Token> consumeType(Lexer::Token::Type);
>+    std::optional<Lexer::Token> consumeTypes(Vector<Lexer::Token::Type>);
>+
>+    std::optional<Variant<int, unsigned>> consumeIntegralLiteral();
>+    std::optional<unsigned> consumeNonNegativeIntegralLiteral();
>+    std::optional<AST::ConstantExpression> parseConstantExpression();
>+    std::optional<AST::TypeArgument> parseTypeArgument();
>+    std::optional<AST::TypeArguments> parseTypeArguments();
>+    struct TypeSuffixAbbreviated {
>+        Lexer::Token token;
>+        std::optional<unsigned> numElements;
>+    };
>+    std::optional<TypeSuffixAbbreviated> parseTypeSuffixAbbreviated();
>+    struct TypeSuffixNonAbbreviated {
>+        Lexer::Token token;
>+        std::optional<Lexer::Token> addressSpace;
>+        std::optional<unsigned> numElements;
>+    };
>+    std::optional<TypeSuffixNonAbbreviated> parseTypeSuffixNonAbbreviated();
>+    std::unique_ptr<AST::Type> parseType();
>+    std::optional<AST::TypeDefinition> parseTypeDefinition();
>+    std::optional<AST::BuiltInSemantic> parseBuiltInSemantic();
>+    std::optional<AST::ResourceSemantic> parseResourceSemantic();
>+    std::optional<AST::SpecializationConstantSemantic> parseSpecializationConstantSemantic();
>+    std::optional<AST::StageInOutSemantic> parseStageInOutSemantic();
>+    std::optional<AST::Semantic> parseSemantic();
>+    AST::Qualifiers parseQualifiers();
>+    std::optional<AST::StructureElement> parseStructureElement();
>+    std::optional<AST::StructureDefinition> parseStructureDefinition();
>+    std::optional<AST::EnumerationDefinition> parseEnumerationDefinition();
>+    std::optional<AST::EnumerationMember> parseEnumerationMember();
>+    std::optional<AST::NativeTypeDeclaration> parseNativeTypeDeclaration();
>+    std::optional<AST::NumThreadsFunctionAttribute> parseNumThreadsFunctionAttribute();
>+    std::optional<AST::AttributeBlock> parseAttributeBlock();
>+    std::optional<AST::Parameter> parseParameter();
>+    std::optional<AST::Parameters> parseParameters();
>+    std::optional<AST::FunctionDeclaration> parseEntryPointFunctionDeclaration();
>+    std::optional<AST::FunctionDeclaration> parseRegularFunctionDeclaration();
>+    std::optional<AST::FunctionDeclaration> parseOperatorFunctionDeclaration();
>+    std::optional<AST::FunctionDeclaration> parseFunctionDeclaration();
>+    std::optional<AST::FunctionDefinition> parseFunctionDefinition();
>+    std::optional<AST::NativeFunctionDeclaration> parseNativeFunctionDeclaration();
>+
>+    std::optional<AST::Block> parseBlock();
>+    AST::Block parseBlockBody(Lexer::Token&& origin);
>+    std::optional<AST::IfStatement> parseIfStatement();
>+    std::optional<AST::SwitchStatement> parseSwitchStatement();
>+    std::optional<AST::SwitchCase> parseSwitchCase();
>+    std::optional<AST::ForLoop> parseForLoop();
>+    std::optional<AST::WhileLoop> parseWhileLoop();
>+    std::optional<AST::DoWhileLoop> parseDoWhileLoop();
>+    std::optional<AST::VariableDeclaration> parseVariableDeclaration(std::unique_ptr<AST::Type>&&);
>+    std::optional<AST::VariableDeclarationsStatement> parseVariableDeclarations();
>+    std::unique_ptr<AST::Statement> parseStatement();
>+
>+    std::unique_ptr<AST::Expression> parseEffectfulExpression();
>+    std::unique_ptr<AST::Expression> parseEffectfulAssignment();
>+    std::unique_ptr<AST::Expression> parseEffectfulPrefix();
>+    std::unique_ptr<AST::Expression> parseEffectfulSuffix();
>+    std::unique_ptr<AST::Expression> parseLimitedSuffixOperator(std::unique_ptr<AST::Expression>&&);
>+    std::unique_ptr<AST::Expression> parseSuffixOperator(std::unique_ptr<AST::Expression>&&);
>+
>+    std::unique_ptr<AST::Expression> parseExpression();
>+    std::unique_ptr<AST::Expression> parseTernaryConditional();
>+    std::unique_ptr<AST::Expression> parseAssignment();
>+    std::unique_ptr<AST::Expression> parsePossibleTernaryConditional();
>+    std::unique_ptr<AST::Expression> parsePossibleLogicalBinaryOperation();
>+    std::unique_ptr<AST::Expression> parsePossibleRelationalBinaryOperation();
>+    std::unique_ptr<AST::Expression> parsePossibleShift();
>+    std::unique_ptr<AST::Expression> parsePossibleAdd();
>+    std::unique_ptr<AST::Expression> parsePossibleMultiply();
>+    std::unique_ptr<AST::Expression> parsePossiblePrefix();
>+    std::unique_ptr<AST::Expression> parsePossibleSuffix();
>+    std::unique_ptr<AST::Expression> parseCallExpression();
>+    std::unique_ptr<AST::Expression> parseTerm();
>+
>+    Lexer m_lexer;
>+};
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Modules/webgpu/WHLSL/WHLSLProgram.h b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLProgram.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..7b609e53c247ae33a5b6e3103d076745c3bfceda
>--- /dev/null
>+++ b/Source/WebCore/Modules/webgpu/WHLSL/WHLSLProgram.h
>@@ -0,0 +1,79 @@
>+/*
>+ * Copyright (C) 2018 Apple Inc. All rights reserved.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>+ * THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+#pragma once
>+
>+#if ENABLE(WEBGPU)
>+
>+#include "WHLSLASTEnumerationDefinition.h"
>+#include "WHLSLASTNativeFunctionDeclaration.h"
>+#include "WHLSLASTNativeTypeDeclaration.h"
>+#include "WHLSLASTStructureDefinition.h"
>+#include "WHLSLASTTypeDefinition.h"
>+#include <wtf/Vector.h>
>+
>+namespace WebCore {
>+
>+namespace WHLSL {
>+
>+class Program {
>+public:
>+    Program() = default;
>+    Program(Program&&) = default;
>+
>+    void append(AST::TypeDefinition&& typeDefinition)
>+    {
>+        m_typeDefinitions.append(WTFMove(typeDefinition));
>+    }
>+    void append(AST::StructureDefinition&& structureDefinition)
>+    {
>+        m_structureDefinitions.append(WTFMove(structureDefinition));
>+    }
>+    void append(AST::EnumerationDefinition&& enumerationDefinition)
>+    {
>+        m_enumerationDefinitions.append(WTFMove(enumerationDefinition));
>+    }
>+    void append(AST::NativeFunctionDeclaration&& nativeFunctionDeclaration)
>+    {
>+        m_nativeFunctionDeclarations.append(WTFMove(nativeFunctionDeclaration));
>+    }
>+    void append(AST::NativeTypeDeclaration&& nativeTypeDeclaration)
>+    {
>+        m_nativeTypeDeclarations.append(WTFMove(nativeTypeDeclaration));
>+    }
>+
>+private:
>+    Vector<AST::TypeDefinition> m_typeDefinitions;
>+    Vector<AST::StructureDefinition> m_structureDefinitions;
>+    Vector<AST::EnumerationDefinition> m_enumerationDefinitions;
>+    Vector<AST::NativeFunctionDeclaration> m_nativeFunctionDeclarations;
>+    Vector<AST::NativeTypeDeclaration> m_nativeTypeDeclarations;
>+};
>+
>+}
>+
>+}
>+
>+#endif
>diff --git a/Source/WebCore/Sources.txt b/Source/WebCore/Sources.txt
>index b4bdb25b5170687440ba663f06a09bec401e0e2f..4bdb5a1cdcd4c6a52503d126c6c3a192893167bc 100644
>--- a/Source/WebCore/Sources.txt
>+++ b/Source/WebCore/Sources.txt
>@@ -301,6 +301,8 @@ Modules/websockets/WebSocketHandshake.cpp
> Modules/websockets/WorkerThreadableWebSocketChannel.cpp
> 
> Modules/webgpu/DOMWindowWebGPU.cpp
>+Modules/webgpu/WHLSL/WHLSLLexer.cpp
>+Modules/webgpu/WHLSL/WHLSLParser.cpp
> Modules/webgpu/WebGPU.cpp
> Modules/webgpu/WebGPUAdapter.cpp
> Modules/webgpu/WebGPUBuffer.cpp
>diff --git a/Source/WebCore/WebCore.xcodeproj/project.pbxproj b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>index edeb4a8e7d6ea6e694b80609e0974a092395da51..170c73148ca74eb7d36c54302d8319a2fb56ddc6 100644
>--- a/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>+++ b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>@@ -6404,6 +6404,30 @@
> 		1C3969CF1B74211E002BCFA7 /* FontCacheCoreText.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = FontCacheCoreText.cpp; sourceTree = "<group>"; };
> 		1C66260E1C6E7CA600AB527C /* FontFace.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = FontFace.cpp; sourceTree = "<group>"; };
> 		1C66260F1C6E7CA600AB527C /* FontFace.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = FontFace.h; sourceTree = "<group>"; };
>+		1C80596B21BA164A006B0906 /* WHLSLASTNode.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTNode.h; sourceTree = "<group>"; };
>+		1C80596F21BB02D3006B0906 /* WHLSLASTPointerType.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTPointerType.h; sourceTree = "<group>"; };
>+		1C80597221BB02EA006B0906 /* WHLSLASTArrayReferenceType.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTArrayReferenceType.h; sourceTree = "<group>"; };
>+		1C80597421BB02FB006B0906 /* WHLSLASTArrayType.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTArrayType.h; sourceTree = "<group>"; };
>+		1C80597621BB0577006B0906 /* WHLSLASTReferenceType.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTReferenceType.h; sourceTree = "<group>"; };
>+		1C80597D21BF55A7006B0906 /* WHLSLASTBaseSemantic.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTBaseSemantic.h; sourceTree = "<group>"; };
>+		1C80598021BF55BA006B0906 /* WHLSLASTBuiltInSemantic.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTBuiltInSemantic.h; sourceTree = "<group>"; };
>+		1C80598221BF55D1006B0906 /* WHLSLASTResourceSemantic.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTResourceSemantic.h; sourceTree = "<group>"; };
>+		1C80598421BF55ED006B0906 /* WHLSLASTSpecializationConstantSemantic.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTSpecializationConstantSemantic.h; sourceTree = "<group>"; };
>+		1C80598621BF5601006B0906 /* WHLSLASTStageInOutSemantic.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTStageInOutSemantic.h; sourceTree = "<group>"; };
>+		1C80598721BF5781006B0906 /* WHLSLASTSemantic.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTSemantic.h; sourceTree = "<group>"; };
>+		1C80598D21C1FD74006B0906 /* WHLSLASTIfStatement.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTIfStatement.h; sourceTree = "<group>"; };
>+		1C80598F21C1FD83006B0906 /* WHLSLASTSwitchStatement.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTSwitchStatement.h; sourceTree = "<group>"; };
>+		1C80599021C1FDAD006B0906 /* WHLSLASTSwitchCase.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTSwitchCase.h; sourceTree = "<group>"; };
>+		1C80599121C1FDC3006B0906 /* WHLSLASTForLoop.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTForLoop.h; sourceTree = "<group>"; };
>+		1C80599221C1FDDA006B0906 /* WHLSLASTWhileLoop.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTWhileLoop.h; sourceTree = "<group>"; };
>+		1C80599321C1FDE8006B0906 /* WHLSLASTDoWhileLoop.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTDoWhileLoop.h; sourceTree = "<group>"; };
>+		1C80599421C1FDFE006B0906 /* WHLSLASTBreak.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTBreak.h; sourceTree = "<group>"; };
>+		1C80599521C1FE07006B0906 /* WHLSLASTContinue.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTContinue.h; sourceTree = "<group>"; };
>+		1C80599621C1FE14006B0906 /* WHLSLASTFallthrough.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTFallthrough.h; sourceTree = "<group>"; };
>+		1C80599721C1FE20006B0906 /* WHLSLASTTrap.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTTrap.h; sourceTree = "<group>"; };
>+		1C80599821C1FE2E006B0906 /* WHLSLASTReturn.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTReturn.h; sourceTree = "<group>"; };
>+		1C80599A21C1FEA0006B0906 /* WHLSLASTStatement.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTStatement.h; sourceTree = "<group>"; };
>+		1C80599C21C2009D006B0906 /* WHLSLASTBlock.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTBlock.h; sourceTree = "<group>"; };
> 		1C81B9560E97330800266E07 /* InspectorController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = InspectorController.h; sourceTree = "<group>"; };
> 		1C81B9570E97330800266E07 /* InspectorController.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = InspectorController.cpp; sourceTree = "<group>"; };
> 		1C81B9580E97330800266E07 /* InspectorClient.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = InspectorClient.h; sourceTree = "<group>"; };
>@@ -6415,6 +6439,8 @@
> 		1CAF34800A6C405200ABE06E /* WebScriptObjectPrivate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebScriptObjectPrivate.h; sourceTree = "<group>"; };
> 		1CB6B4F8217B83930093B9CD /* TextDecorationThickness.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = TextDecorationThickness.h; sourceTree = "<group>"; };
> 		1CB6B4FB217B83940093B9CD /* TextUnderlineOffset.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = TextUnderlineOffset.h; sourceTree = "<group>"; };
>+		1CC46F2721B77860000998DE /* WHLSLASTTypeReference.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTTypeReference.h; sourceTree = "<group>"; };
>+		1CC46F2921B77A32000998DE /* WHLSLASTTypeArgument.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTTypeArgument.h; sourceTree = "<group>"; };
> 		1CCDF5BB1990332400BCEBAD /* SVGToOTFFontConversion.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = SVGToOTFFontConversion.cpp; sourceTree = "<group>"; };
> 		1CCDF5BC1990332400BCEBAD /* SVGToOTFFontConversion.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SVGToOTFFontConversion.h; sourceTree = "<group>"; };
> 		1CDD45E40BA9C84600F90147 /* DebugRelease.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; path = DebugRelease.xcconfig; sourceTree = "<group>"; };
>@@ -13207,11 +13233,44 @@
> 		C11A9ED22140578B00CFB20A /* SwitchingGPUClient.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = SwitchingGPUClient.cpp; sourceTree = "<group>"; };
> 		C1E1D235203DF15400584665 /* ScreenProperties.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = ScreenProperties.h; sourceTree = "<group>"; };
> 		C2015C091BE6FE2C00822389 /* FontVariantBuilder.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = FontVariantBuilder.h; sourceTree = "<group>"; };
>+		C210E91121B4BD1000B7F83D /* WHLSLLexer.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = WHLSLLexer.cpp; sourceTree = "<group>"; };
>+		C210E91221B4BD1000B7F83D /* WHLSLLexer.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLLexer.h; sourceTree = "<group>"; };
> 		C21DF2E71D9E4E9900F5B24C /* CSSFontVariationValue.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = CSSFontVariationValue.cpp; sourceTree = "<group>"; };
> 		C21DF2E81D9E4E9900F5B24C /* CSSFontVariationValue.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSFontVariationValue.h; sourceTree = "<group>"; };
>+		C22F76C021C0A45800C5434E /* WHLSLASTExpression.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTExpression.h; sourceTree = "<group>"; };
>+		C22F76C121C0A63E00C5434E /* WHLSLASTCommaExpression.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTCommaExpression.h; sourceTree = "<group>"; };
>+		C22F76C221C0A6DE00C5434E /* WHLSLASTTernaryExpression.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTTernaryExpression.h; sourceTree = "<group>"; };
>+		C22F76C321C0A75500C5434E /* WHLSLASTAssignmentExpression.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTAssignmentExpression.h; sourceTree = "<group>"; };
>+		C22F76C421C0A76300C5434E /* WHLSLASTReadModifyWriteExpression.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTReadModifyWriteExpression.h; sourceTree = "<group>"; };
>+		C22F76C521C0A7AE00C5434E /* WHLSLASTLogicalExpression.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTLogicalExpression.h; sourceTree = "<group>"; };
>+		C22F76C621C0A7BD00C5434E /* WHLSLASTCallExpression.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTCallExpression.h; sourceTree = "<group>"; };
>+		C22F76C721C0A8CF00C5434E /* WHLSLASTDereferenceExpression.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTDereferenceExpression.h; sourceTree = "<group>"; };
>+		C22F76C821C0A8E000C5434E /* WHLSLASTMakePointerExpression.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTMakePointerExpression.h; sourceTree = "<group>"; };
>+		C22F76C921C0A8F200C5434E /* WHLSLASTMakeArrayReferenceExpression.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTMakeArrayReferenceExpression.h; sourceTree = "<group>"; };
>+		C22F76CA21C0A90400C5434E /* WHLSLASTLogicalNotExpression.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTLogicalNotExpression.h; sourceTree = "<group>"; };
>+		C22F76CB21C0A98B00C5434E /* WHLSLASTNullLiteral.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTNullLiteral.h; sourceTree = "<group>"; };
>+		C22F76CC21C0A9A700C5434E /* WHLSLASTVariableReference.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTVariableReference.h; sourceTree = "<group>"; };
>+		C22F76CD21C0A9BA00C5434E /* WHLSLASTIntegerLiteral.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTIntegerLiteral.h; sourceTree = "<group>"; };
>+		C22F76CE21C0A9C900C5434E /* WHLSLASTUnsignedIntegerLiteral.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTUnsignedIntegerLiteral.h; sourceTree = "<group>"; };
>+		C22F76CF21C0A9F100C5434E /* WHLSLASTFloatLiteral.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTFloatLiteral.h; sourceTree = "<group>"; };
>+		C22F76D021C0AA1400C5434E /* WHLSLASTBooleanLiteral.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTBooleanLiteral.h; sourceTree = "<group>"; };
>+		C22F76D121C0AA5300C5434E /* WHLSLASTDotExpression.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTDotExpression.h; sourceTree = "<group>"; };
>+		C22F76D221C0AA6300C5434E /* WHLSLASTIndexExpression.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTIndexExpression.h; sourceTree = "<group>"; };
>+		C22F76D321C0AC5300C5434E /* WHLSLASTAnonymousVariableDeclaration.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTAnonymousVariableDeclaration.h; sourceTree = "<group>"; };
>+		C22F76D421C0AFCF00C5434E /* WHLSLASTPropertyAccessExpression.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTPropertyAccessExpression.h; sourceTree = "<group>"; };
>+		C22F76DD21C2508500C5434E /* WHLSLASTConstantExpressionEnumerationMemberReference.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTConstantExpressionEnumerationMemberReference.h; sourceTree = "<group>"; };
>+		C22F76DE21C2512800C5434E /* WHLSLASTConstantExpression.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTConstantExpression.h; sourceTree = "<group>"; };
>+		C22F76DF21C26F4700C5434E /* WHLSLASTVariableDeclarationsStatement.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTVariableDeclarationsStatement.h; sourceTree = "<group>"; };
>+		C22F76E021C26F5B00C5434E /* WHLSLASTEffectfulExpressionStatement.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTEffectfulExpressionStatement.h; sourceTree = "<group>"; };
> 		C2458E611FE8979E00594759 /* FontCacheCoreText.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = FontCacheCoreText.h; sourceTree = "<group>"; };
> 		C26017A11C72DC9900F74A16 /* CSSFontFaceSet.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = CSSFontFaceSet.cpp; sourceTree = "<group>"; };
> 		C26017A21C72DC9900F74A16 /* CSSFontFaceSet.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSFontFaceSet.h; sourceTree = "<group>"; };
>+		C274F13521C032D6003410BD /* WHLSLASTFunctionDeclaration.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTFunctionDeclaration.h; sourceTree = "<group>"; };
>+		C274F13721C03E95003410BD /* WHLSLASTBaseFunctionAttribute.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTBaseFunctionAttribute.h; sourceTree = "<group>"; };
>+		C274F13921C03EAC003410BD /* WHLSLASTNumThreadsFunctionAttribute.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTNumThreadsFunctionAttribute.h; sourceTree = "<group>"; };
>+		C274F13B21C03EBF003410BD /* WHLSLASTFunctionAttribute.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTFunctionAttribute.h; sourceTree = "<group>"; };
>+		C274F13D21C04AD5003410BD /* WHLSLASTParameter.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTParameter.h; sourceTree = "<group>"; };
>+		C274F13F21C04D57003410BD /* WHLSLASTValue.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTValue.h; sourceTree = "<group>"; };
> 		C280833C1C6DB194001451B6 /* FontFace.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = FontFace.idl; sourceTree = "<group>"; };
> 		C280833D1C6DC22C001451B6 /* JSFontFace.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = JSFontFace.cpp; path = DerivedSources/WebCore/JSFontFace.cpp; sourceTree = BUILT_PRODUCTS_DIR; };
> 		C280833E1C6DC22C001451B6 /* JSFontFace.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = JSFontFace.h; path = DerivedSources/WebCore/JSFontFace.h; sourceTree = BUILT_PRODUCTS_DIR; };
>@@ -13224,6 +13283,20 @@
> 		C2E38EFC1E8396FD00CA3ADF /* CSSFontStyleValue.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSFontStyleValue.h; sourceTree = "<group>"; };
> 		C2E38EFF1E84573500CA3ADF /* CSSFontStyleRangeValue.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = CSSFontStyleRangeValue.cpp; sourceTree = "<group>"; };
> 		C2E38F001E84573500CA3ADF /* CSSFontStyleRangeValue.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSFontStyleRangeValue.h; sourceTree = "<group>"; };
>+		C2ECEB4C21B63CBB008F8DE9 /* WHLSLParser.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = WHLSLParser.cpp; sourceTree = "<group>"; };
>+		C2ECEB4D21B63CBB008F8DE9 /* WHLSLParser.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLParser.h; sourceTree = "<group>"; };
>+		C2ECEB5021B64C72008F8DE9 /* WHLSLASTVariableDeclaration.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTVariableDeclaration.h; sourceTree = "<group>"; };
>+		C2ECEB5221B64C84008F8DE9 /* WHLSLASTTypeDefinition.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTTypeDefinition.h; sourceTree = "<group>"; };
>+		C2ECEB5421B64C97008F8DE9 /* WHLSLASTStructureDefinition.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTStructureDefinition.h; sourceTree = "<group>"; };
>+		C2ECEB5621B64CAB008F8DE9 /* WHLSLASTEnumerationDefinition.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTEnumerationDefinition.h; sourceTree = "<group>"; };
>+		C2ECEB5821B64CBE008F8DE9 /* WHLSLASTFunctionDefinition.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTFunctionDefinition.h; sourceTree = "<group>"; };
>+		C2ECEB5A21B64CD5008F8DE9 /* WHLSLASTNativeFunctionDeclaration.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTNativeFunctionDeclaration.h; sourceTree = "<group>"; };
>+		C2ECEB5C21B64CE4008F8DE9 /* WHLSLASTNativeTypeDeclaration.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTNativeTypeDeclaration.h; sourceTree = "<group>"; };
>+		C2ECEB5E21B64D6F008F8DE9 /* WHLSLProgram.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLProgram.h; sourceTree = "<group>"; };
>+		C2ECEB6021B64DC6008F8DE9 /* WHLSLASTType.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTType.h; sourceTree = "<group>"; };
>+		C2ECEB6C21BE4896008F8DE9 /* WHLSLASTStructureElement.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTStructureElement.h; sourceTree = "<group>"; };
>+		C2ECEB7421BF7F3A008F8DE9 /* WHLSLASTQualifier.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTQualifier.h; sourceTree = "<group>"; };
>+		C2ECEB7921BF8E05008F8DE9 /* WHLSLASTEnumerationMember.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WHLSLASTEnumerationMember.h; sourceTree = "<group>"; };
> 		C2F4E7881E45AEDF006D7105 /* ComplexTextController.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = ComplexTextController.cpp; sourceTree = "<group>"; };
> 		C2F4E7891E45AEDF006D7105 /* ComplexTextController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ComplexTextController.h; sourceTree = "<group>"; };
> 		C330A22113EC196B0000B45B /* ColorChooser.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ColorChooser.h; sourceTree = "<group>"; };
>@@ -25191,6 +25264,86 @@
> 			tabWidth = 4;
> 			usesTabs = 0;
> 		};
>+		C210E90D21B4BCA400B7F83D /* WHLSL */ = {
>+			isa = PBXGroup;
>+			children = (
>+				C22F76D321C0AC5300C5434E /* WHLSLASTAnonymousVariableDeclaration.h */,
>+				1C80597221BB02EA006B0906 /* WHLSLASTArrayReferenceType.h */,
>+				1C80597421BB02FB006B0906 /* WHLSLASTArrayType.h */,
>+				C22F76C321C0A75500C5434E /* WHLSLASTAssignmentExpression.h */,
>+				C274F13721C03E95003410BD /* WHLSLASTBaseFunctionAttribute.h */,
>+				1C80597D21BF55A7006B0906 /* WHLSLASTBaseSemantic.h */,
>+				1C80599C21C2009D006B0906 /* WHLSLASTBlock.h */,
>+				C22F76D021C0AA1400C5434E /* WHLSLASTBooleanLiteral.h */,
>+				1C80599421C1FDFE006B0906 /* WHLSLASTBreak.h */,
>+				1C80598021BF55BA006B0906 /* WHLSLASTBuiltInSemantic.h */,
>+				C22F76C621C0A7BD00C5434E /* WHLSLASTCallExpression.h */,
>+				C22F76C121C0A63E00C5434E /* WHLSLASTCommaExpression.h */,
>+				C22F76DE21C2512800C5434E /* WHLSLASTConstantExpression.h */,
>+				C22F76DD21C2508500C5434E /* WHLSLASTConstantExpressionEnumerationMemberReference.h */,
>+				1C80599521C1FE07006B0906 /* WHLSLASTContinue.h */,
>+				C22F76C721C0A8CF00C5434E /* WHLSLASTDereferenceExpression.h */,
>+				C22F76D121C0AA5300C5434E /* WHLSLASTDotExpression.h */,
>+				1C80599321C1FDE8006B0906 /* WHLSLASTDoWhileLoop.h */,
>+				C22F76E021C26F5B00C5434E /* WHLSLASTEffectfulExpressionStatement.h */,
>+				C2ECEB5621B64CAB008F8DE9 /* WHLSLASTEnumerationDefinition.h */,
>+				C2ECEB7921BF8E05008F8DE9 /* WHLSLASTEnumerationMember.h */,
>+				C22F76C021C0A45800C5434E /* WHLSLASTExpression.h */,
>+				1C80599621C1FE14006B0906 /* WHLSLASTFallthrough.h */,
>+				C22F76CF21C0A9F100C5434E /* WHLSLASTFloatLiteral.h */,
>+				1C80599121C1FDC3006B0906 /* WHLSLASTForLoop.h */,
>+				C274F13B21C03EBF003410BD /* WHLSLASTFunctionAttribute.h */,
>+				C274F13521C032D6003410BD /* WHLSLASTFunctionDeclaration.h */,
>+				C2ECEB5821B64CBE008F8DE9 /* WHLSLASTFunctionDefinition.h */,
>+				1C80598D21C1FD74006B0906 /* WHLSLASTIfStatement.h */,
>+				C22F76D221C0AA6300C5434E /* WHLSLASTIndexExpression.h */,
>+				C22F76CD21C0A9BA00C5434E /* WHLSLASTIntegerLiteral.h */,
>+				C22F76C521C0A7AE00C5434E /* WHLSLASTLogicalExpression.h */,
>+				C22F76CA21C0A90400C5434E /* WHLSLASTLogicalNotExpression.h */,
>+				C22F76C921C0A8F200C5434E /* WHLSLASTMakeArrayReferenceExpression.h */,
>+				C22F76C821C0A8E000C5434E /* WHLSLASTMakePointerExpression.h */,
>+				C2ECEB5A21B64CD5008F8DE9 /* WHLSLASTNativeFunctionDeclaration.h */,
>+				C2ECEB5C21B64CE4008F8DE9 /* WHLSLASTNativeTypeDeclaration.h */,
>+				1C80596B21BA164A006B0906 /* WHLSLASTNode.h */,
>+				C22F76CB21C0A98B00C5434E /* WHLSLASTNullLiteral.h */,
>+				C274F13921C03EAC003410BD /* WHLSLASTNumThreadsFunctionAttribute.h */,
>+				C274F13D21C04AD5003410BD /* WHLSLASTParameter.h */,
>+				1C80596F21BB02D3006B0906 /* WHLSLASTPointerType.h */,
>+				C22F76D421C0AFCF00C5434E /* WHLSLASTPropertyAccessExpression.h */,
>+				C2ECEB7421BF7F3A008F8DE9 /* WHLSLASTQualifier.h */,
>+				C22F76C421C0A76300C5434E /* WHLSLASTReadModifyWriteExpression.h */,
>+				1C80597621BB0577006B0906 /* WHLSLASTReferenceType.h */,
>+				1C80598221BF55D1006B0906 /* WHLSLASTResourceSemantic.h */,
>+				1C80599821C1FE2E006B0906 /* WHLSLASTReturn.h */,
>+				1C80598721BF5781006B0906 /* WHLSLASTSemantic.h */,
>+				1C80598421BF55ED006B0906 /* WHLSLASTSpecializationConstantSemantic.h */,
>+				1C80598621BF5601006B0906 /* WHLSLASTStageInOutSemantic.h */,
>+				1C80599A21C1FEA0006B0906 /* WHLSLASTStatement.h */,
>+				C2ECEB5421B64C97008F8DE9 /* WHLSLASTStructureDefinition.h */,
>+				C2ECEB6C21BE4896008F8DE9 /* WHLSLASTStructureElement.h */,
>+				1C80599021C1FDAD006B0906 /* WHLSLASTSwitchCase.h */,
>+				1C80598F21C1FD83006B0906 /* WHLSLASTSwitchStatement.h */,
>+				C22F76C221C0A6DE00C5434E /* WHLSLASTTernaryExpression.h */,
>+				1C80599721C1FE20006B0906 /* WHLSLASTTrap.h */,
>+				C2ECEB6021B64DC6008F8DE9 /* WHLSLASTType.h */,
>+				1CC46F2921B77A32000998DE /* WHLSLASTTypeArgument.h */,
>+				C2ECEB5221B64C84008F8DE9 /* WHLSLASTTypeDefinition.h */,
>+				1CC46F2721B77860000998DE /* WHLSLASTTypeReference.h */,
>+				C22F76CE21C0A9C900C5434E /* WHLSLASTUnsignedIntegerLiteral.h */,
>+				C274F13F21C04D57003410BD /* WHLSLASTValue.h */,
>+				C2ECEB5021B64C72008F8DE9 /* WHLSLASTVariableDeclaration.h */,
>+				C22F76DF21C26F4700C5434E /* WHLSLASTVariableDeclarationsStatement.h */,
>+				C22F76CC21C0A9A700C5434E /* WHLSLASTVariableReference.h */,
>+				1C80599221C1FDDA006B0906 /* WHLSLASTWhileLoop.h */,
>+				C210E91121B4BD1000B7F83D /* WHLSLLexer.cpp */,
>+				C210E91221B4BD1000B7F83D /* WHLSLLexer.h */,
>+				C2ECEB4C21B63CBB008F8DE9 /* WHLSLParser.cpp */,
>+				C2ECEB4D21B63CBB008F8DE9 /* WHLSLParser.h */,
>+				C2ECEB5E21B64D6F008F8DE9 /* WHLSLProgram.h */,
>+			);
>+			path = WHLSL;
>+			sourceTree = "<group>";
>+		};
> 		C96F5EBF1B5872260091EA9D /* mediasession */ = {
> 			isa = PBXGroup;
> 			children = (
>@@ -25533,6 +25686,7 @@
> 		D00F593E216ECC43000D71DB /* webgpu */ = {
> 			isa = PBXGroup;
> 			children = (
>+				C210E90D21B4BCA400B7F83D /* WHLSL */,
> 				D00F5941216ECC7A000D71DB /* DOMWindowWebGPU.cpp */,
> 				D00F5940216ECC7A000D71DB /* DOMWindowWebGPU.h */,
> 				D00F5942216ECC7A000D71DB /* DOMWindowWebGPU.idl */,
>@@ -25549,9 +25703,7 @@
> 				D0D8648E21B70676003C983C /* WebGPUBuffer.idl */,
> 				D0D8648221B61727003C983C /* WebGPUBufferDescriptor.h */,
> 				D0D8648321B61727003C983C /* WebGPUBufferDescriptor.idl */,
>-				D063AE4E21C0810A000E6A35 /* WebGPUBufferUsage.h */,
> 				D063AE3F21C05DDD000E6A35 /* WebGPUBufferUsage.h */,
>-				D063AE4C21C07AB5000E6A35 /* WebGPUBufferUsage.idl */,
> 				D063AE4021C05DDD000E6A35 /* WebGPUBufferUsage.idl */,
> 				D001D9AC21B0C81A0023B9BC /* WebGPUColor.h */,
> 				D001D9AD21B0C81A0023B9BC /* WebGPUColor.idl */,

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Attachments on bug 192355: 356468 | 356569 | 356570 | 356585 | 356695 | 356778 | 356863 | 356947 | 357031 | 357035 | 357038 | 357081 | 357103 | 357199 | 357207 | 357225 | 357245 | 357268 | 357277 | 357303 | 357304 | 357361 | 357410 | 357430 | 357458 | 357520 | 357602 | 357749 | 357754 | 357765 | 357869 | 357889 | 357929 | 357932 | 357975 | 358866 | 358880 | 358902 | 359250