[all-commits] [llvm/llvm-project] ab53e1: [C2y] Claim conformance to WG14 N3363 (#130980)

[Aaron Ballman via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ab53e1c8e52388377ba50c05979b03a691513cfd
      https://github.com/llvm/llvm-project/commit/ab53e1c8e52388377ba50c05979b03a691513cfd
  Author: Aaron Ballman <aaron at aaronballman.com>
  Date:   2025-03-12 (Wed, 12 Mar 2025)

  Changed paths:
    A clang/test/C/C2y/n3363.c
    M clang/www/c_status.html

  Log Message:
  -----------
  [C2y] Claim conformance to WG14 N3363 (#130980)

This paper clarifies two things:
  * a call to va_start must be within the body of a variadic function,
  * the va_list arguments must be lvalues

Clang has correctly diagnosed the first point since Clang 5.0. Clang
generally diagnoses the second point, except for va_copy. However, the
second point is not a constraint violation, so a diagnostic is not
strictly required. That said, it would be good for us to properly
diagnose va_copy.



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