[all-commits] [llvm/llvm-project] 72af74: Reject auto combined with type specifiers in C++ (...

[Osama Abdelkader via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 72af746a3e19627fc1d1c40bf6eabb2887850ac5
      https://github.com/llvm/llvm-project/commit/72af746a3e19627fc1d1c40bf6eabb2887850ac5
  Author: Osama Abdelkader <osama.abdelkader at gmail.com>
  Date:   2026-07-11 (Sat, 11 Jul 2026)

  Changed paths:
    M clang/docs/ReleaseNotes.md
    M clang/include/clang/Basic/DiagnosticSemaKinds.td
    M clang/include/clang/Sema/DeclSpec.h
    M clang/lib/Parse/ParseDecl.cpp
    M clang/lib/Sema/DeclSpec.cpp
    M clang/test/CXX/dcl.dcl/dcl.spec/dcl.stc/p2.cpp
    M clang/test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.spec.auto/p3-1y.cpp
    M clang/test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.spec.auto/p3-generic-lambda-1y.cpp
    M clang/test/CXX/dcl.dcl/dcl.spec/dcl.type/dcl.spec.auto/p3.cpp
    M clang/test/CXX/dcl/dcl.fct/p17.cpp
    M clang/test/CXX/drs/cwg3xx.cpp
    M clang/test/Parser/c2x-auto.c
    M clang/test/SemaCXX/auto-cxx0x.cpp
    M clang/test/SemaCXX/class.cpp
    M clang/test/SemaCXX/static-data-member.cpp

  Log Message:
  -----------
  Reject auto combined with type specifiers in C++ (#208552)

Follow-up of https://github.com/llvm/llvm-project/pull/166004

- Diagnose C++ declarations that combine `auto` with another type
specifier, such as `auto int` .
- Preserve C/C23 handling where `auto` can still be interpreted as a
storage-class specifier in valid combinations.
- Fix parser disambiguation so `auto Use = 0` treats `Use` as the
declarator name before type lookup, avoiding ambiguous lookup
regressions.

---------

Signed-off-by: Osama Abdelkader <osama.abdelkader at gmail.com>



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