[webkit-changes] [WebKit/WebKit] a9da0d: [WGSL] Add zero-initializer declarations

[Tadeu Zagallo]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: a9da0d20bb1c1e62953893d1a08211e7ba6ea0d9
      https://github.com/WebKit/WebKit/commit/a9da0d20bb1c1e62953893d1a08211e7ba6ea0d9
  Author: Tadeu Zagallo <tzagallo at apple.com>
  Date:   2023-06-13 (Tue, 13 Jun 2023)

  Changed paths:
    M Source/WebGPU/WGSL/TypeCheck.cpp
    M Source/WebGPU/WGSL/TypeDeclarations.rb
    M Source/WebGPU/WGSL/tests/invalid/array.wgsl
    M Source/WebGPU/WGSL/tests/valid/overload.wgsl

  Log Message:
  -----------
  [WGSL] Add zero-initializer declarations
https://bugs.webkit.org/show_bug.cgi?id=257902
rdar://110540048

Reviewed by Dan Glastonbury.

Add declarations according to the spec[1]. Additionally, constructors for arrays
and structs are handled directly in the type checker, so that is also updated.

[1]: https://gpuweb.github.io/gpuweb/wgsl/#zero-value-builtin-function

* Source/WebGPU/WGSL/TypeCheck.cpp:
(WGSL::TypeChecker::visit):
* Source/WebGPU/WGSL/TypeDeclarations.rb:
* Source/WebGPU/WGSL/tests/invalid/array.wgsl:
* Source/WebGPU/WGSL/tests/valid/overload.wgsl:

Canonical link: https://commits.webkit.org/265108@main