[all-commits] [llvm/llvm-project] 3a1568: [Clang] Do not warn on UTF-16 -> UTF-32 conversion...

[Corentin Jabot via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3a15687d1c789ebac04bf394ec31f95331c74bf8
      https://github.com/llvm/llvm-project/commit/3a15687d1c789ebac04bf394ec31f95331c74bf8
  Author: Corentin Jabot <corentinjabot at gmail.com>
  Date:   2025-10-19 (Sun, 19 Oct 2025)

  Changed paths:
    M clang/lib/Sema/SemaChecking.cpp
    M clang/test/SemaCXX/warn-implicit-unicode-conversions.cpp

  Log Message:
  -----------
  [Clang] Do not warn on UTF-16 -> UTF-32 conversions. (#163927)

UTF-16 to UTF-16 conversions seems widespread,
and lone surrogate have a distinct representation in UTF-32.

Lets not warn on this case to make the warning easier to adopt. This
follows SG-16 guideline


https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2025/p3695r2.html#changes-since-r1

Fixes #163719



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