[all-commits] [llvm/llvm-project] ab4c22: [Concepts] Improve diagnostics on a missing 'auto'...

[Erich Keane via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ab4c22e2b735c839c667e08be303f7f8cef3ccf6
      https://github.com/llvm/llvm-project/commit/ab4c22e2b735c839c667e08be303f7f8cef3ccf6
  Author: Erich Keane <erich.keane at intel.com>
  Date:   2022-11-01 (Tue, 01 Nov 2022)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/lib/Parse/ParseDecl.cpp
    M clang/lib/Parse/ParseTentative.cpp
    M clang/test/Parser/cxx2a-placeholder-type-constraint.cpp
    M clang/test/SemaTemplate/concepts.cpp

  Log Message:
  -----------
  [Concepts] Improve diagnostics on a missing 'auto' keyword.

As reported in https://github.com/llvm/llvm-project/issues/49192,
we did a pretty poor job diagnosing cases where someone forgot 'auto', a
nd is probably in the middle of a variable declaration.  This patch
makes us properly diagnose in cases where the next token is a reference,
or CVR qualifier.