[all-commits] [llvm/llvm-project] 9ba1a3: Reject invalid integer constants in unevaluated pr...

[Aaron Ballman via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9ba1a3fcb53936f20533585df283b3734ae8c4ef
      https://github.com/llvm/llvm-project/commit/9ba1a3fcb53936f20533585df283b3734ae8c4ef
  Author: Aaron Ballman <aaron at aaronballman.com>
  Date:   2025-04-08 (Tue, 08 Apr 2025)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/lib/Lex/PPExpressions.cpp
    A clang/test/Preprocessor/constants.c

  Log Message:
  -----------
  Reject invalid integer constants in unevaluated preprocessor operands (#134884)

Clang was previously accepting invalid code like:
```
  #if 1 ? 1 : 999999999999999999999
  #endif
```
because the integer constant (which is too large to fit into any
standard or extended integer type) was in an unevaluated branch of the
conditional operator. Similar invalid code involving || or && was also
accepted and is now rejected.

Fixes #134658



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