[all-commits] [llvm/llvm-project] 141801: [clang][ObjectiveC] Fix Parsing the `::` Optional ...

[Qiongsi Wu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 14180185026b8ed793cc7dfd037620e5150ccc35
      https://github.com/llvm/llvm-project/commit/14180185026b8ed793cc7dfd037620e5150ccc35
  Author: Qiongsi Wu <274595+qiongsiwu at users.noreply.github.com>
  Date:   2024-12-20 (Fri, 20 Dec 2024)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/lib/Parse/Parser.cpp
    A clang/test/Parser/objc-coloncolon.m
    A clang/test/Parser/objcxx-coloncolon.mm

  Log Message:
  -----------
  [clang][ObjectiveC] Fix Parsing the `::` Optional Scope Specifier (#119908)

The parser hangs when processing types/variables prefixed by `::` as an
optional scope specifier. For example,
```
- (instancetype)init:(::A *) foo;
```

The parser should not hang, and it should emit an error. This PR
implements the error check.

rdar://140885078



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