[PATCH] D64914: Implement P1771

[Erich Keane via Phabricator via cfe-commits]

erichkeane created this revision.
erichkeane added reviewers: aaron.ballman, chandlerc.
Herald added a project: clang.

EWG met on 7/18/19 and came to the conclusion that our initial intent
was to apply to constructors, so approved the paper and expected
implementers to use implementers discretion to backport this to previous
standards.  ChandlerC was particularly vocal in wanting this.

The intent is to enable the library to start using this on the
constructors of scope_guard/lock_guard.


Repository:
  rC Clang

https://reviews.llvm.org/D64914

Files:
  clang/include/clang/Basic/DiagnosticSemaKinds.td
  clang/lib/AST/Expr.cpp
  clang/lib/Sema/SemaDeclAttr.cpp
  clang/lib/Sema/SemaStmt.cpp
  clang/test/CXX/dcl.dcl/dcl.attr/dcl.attr.nodiscard/p2.cpp

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