[PATCH] D56731: Add -Wimplicit-ctad warning to diagnose CTAD on types with no user defined deduction guides.

[Eric Fiselier via Phabricator via cfe-commits]

EricWF updated this revision to Diff 181972.
EricWF added a comment.

Address review comments.

- Use "%0 maybe not intend to support ctad" like warning text.
- Add note about suppression.
- Rename `-Wimplicit-ctad` -> `-Wctad-maybe-unsupported` (Perhaps it should be `-Wctad-maybe-unintended`?)

Add more tests!


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D56731/new/

https://reviews.llvm.org/D56731

Files:
  include/clang/Basic/DiagnosticGroups.td
  include/clang/Basic/DiagnosticSemaKinds.td
  lib/Sema/SemaInit.cpp
  test/SemaCXX/cxx1z-class-template-argument-deduction.cpp

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