[PATCH] D86751: Add new warning for compound punctuation tokens that are split across macro expansions or split by whitespace.

[Richard Smith - zygoloid via Phabricator via cfe-commits]

rsmith created this revision.
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For example:

FOO({})

... forms a statement-expression after macro expansion. This warning
applies to '({' and '})' delimiting statement-expressions, '[[' and ']]'
delimiting attributes, and '::*' introducing a pointer-to-member.

The warning for forming these compound tokens across macro expansions
(or across files!) is enabled by default; the warning for whitespace
within the tokens is not, but is included in -Wall.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D86751

Files:
  clang/include/clang/Basic/DiagnosticGroups.td
  clang/include/clang/Basic/DiagnosticParseKinds.td
  clang/include/clang/Parse/Parser.h
  clang/lib/Headers/altivec.h
  clang/lib/Parse/ParseDecl.cpp
  clang/lib/Parse/ParseDeclCXX.cpp
  clang/lib/Parse/ParseExpr.cpp
  clang/lib/Parse/ParseStmt.cpp
  clang/lib/Parse/Parser.cpp
  clang/test/Misc/warning-wall.c
  clang/test/Parser/compound-token-split.cpp

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