189290 2018-09-04 17:32:16 -0700 [WHLSL] It shouldn’t be possible to use ternary expressions as l-values 2018-10-13 14:35:55 -0700 1 1 1 Unclassified WebKit WebGPU Other Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 176199 1 tdenney tdenney commit-queue dino ews-feeder mmaxfield webkit-bug-importer oldest_to_newest 1456554 0 tdenney 2018-09-04 17:32:16 -0700 Ternary expressions can be used as l-values: (someCondition ? a : b) = 42; It should be possible to take the address of any l-value, however the following doesn’t work: int a = 42; int b = 43; thread int* c = (someCondition ? a : b); We should either disallow taking the address of a ternary expression, improve the current error message “Bad address space: undefined”, or support this. 1456556 1 tdenney 2018-09-04 17:38:56 -0700 (In reply to Thomas Denney from comment #0) > Ternary expressions can be used as l-values: > > (someCondition ? a : b) = 42; > > It should be possible to take the address of any l-value, however the > following doesn’t work: > > int a = 42; > int b = 43; > thread int* c = (someCondition ? a : b); Sorry, that should be thread int* c = &(someCondition ? a : b); > > We should either disallow taking the address of a ternary expression, > improve the current error message “Bad address space: undefined”, or support > this. 1456557 2 tdenney 2018-09-04 17:40:47 -0700 It is worth noting that C doesn’t permit this because it treats the ternary expression as an r-value, and therefore you cannot take its address. 1456560 3 tdenney 2018-09-04 17:47:54 -0700 We will therefore disallow: 1456561 4 tdenney 2018-09-04 17:48:37 -0700 Therefore the following needs to be disallowed: (someCondition ? a : b) = something &(someCondition ? a : b) 1456563 5 mmaxfield 2018-09-04 17:50:30 -0700 (In reply to Thomas Denney from comment #4) > Therefore the following needs to be disallowed: > > (someCondition ? a : b) = something > &(someCondition ? a : b) So ternary expressions will never be lvalues. Makes it easy. 1462084 6 350425 tdenney 2018-09-21 14:13:44 -0700 Created attachment 350425 Patch 1462960 7 350425 mmaxfield 2018-09-24 15:57:55 -0700 Comment on attachment 350425 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=350425&action=review Should also remove the block from NormalUsePropertyResolver. > Tools/WebGPUShadingLanguageRI/TernaryExpression.js:-41 > - get isLValue() { return this._isLValue; } > - set isLValue(value) { this._isLValue = value; } Similar to how CommaExpression.js has a comment about why it isn't an lvalue, a comment here would be appreciated. 1463019 8 350713 tdenney 2018-09-24 17:06:18 -0700 Created attachment 350713 Patch 1463023 9 350714 tdenney 2018-09-24 17:08:48 -0700 Created attachment 350714 Patch 1463024 10 350714 ews-feeder 2018-09-24 17:09:51 -0700 Comment on attachment 350714 Patch Rejecting attachment 350714 from commit-queue. tdenney@apple.com does not have committer permissions according to https://trac.webkit.org/browser/trunk/Tools/Scripts/webkitpy/common/config/contributors.json. - If you do not have committer rights please read http://webkit.org/coding/contributing.html for instructions on how to use bugzilla flags. - If you have committer rights please correct the error in Tools/Scripts/webkitpy/common/config/contributors.json by adding yourself to the file (no review needed). 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After restart the commit-queue will correctly respect your committer rights. 1463054 11 350714 commit-queue 2018-09-24 18:16:23 -0700 Comment on attachment 350714 Patch Clearing flags on attachment: 350714 Committed r236449: <https://trac.webkit.org/changeset/236449> 1463066 12 webkit-bug-importer 2018-09-24 18:47:25 -0700 <rdar://problem/44748793> 1468819 13 mmaxfield 2018-10-13 14:35:55 -0700 Migrated to https://github.com/gpuweb/WHLSL/issues/43 350425 2018-09-21 14:13:44 -0700 2018-09-24 15:57:55 -0700 Patch bug-189290-20180921141337.patch text/plain 7580 tdenney U3VidmVyc2lvbiBSZXZpc2lvbjogMjM2MzU3CmRpZmYgLS1naXQgYS9Ub29scy9DaGFuZ2VMb2cg Yi9Ub29scy9DaGFuZ2VMb2cKaW5kZXggZGE3ODQ1MDQwMDI4YjNiM2FiZWVhYWYyZjAzNzlhOGI5 NDYxOWQ4My4uNjA1MmY0MzY5YzFjZjYyMGY0YTA0ZDQ0ZGU1ZWUyM2MyNWI1YjVlMiAxMDA2NDQK LS0tIGEvVG9vbHMvQ2hhbmdlTG9nCisrKyBiL1Rvb2xzL0NoYW5nZUxvZwpAQCAtMSwzICsxLDMw IEBACisyMDE4LTA5LTIxICBUaG9tYXMgRGVubmV5ICA8dGRlbm5leUBhcHBsZS5jb20+CisKKyAg 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