[PATCH] D86782: [clang-format] Allow configuring list of macros that map to attributes

[Alexander Richardson via Phabricator via cfe-commits]

arichardson created this revision.
arichardson added reviewers: MyDeveloperDay, JakeMerdichAMD, sammccall, curdeius, jrtc27.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.
arichardson requested review of this revision.

This adds a `AttributeMacros` configuration option that causes certain
identifiers to be parsed like a __attribute__((foo)) annotation.
This is motivated by our CHERI C/C++ fork which adds a __capability
qualifier for pointer/reference. Without this change clang-format parses
many type declarations as multiplications/bitwise-and instead.
I initially considered adding "__capability" as a new clang-format keyword,
but having a list of macros that should be treated as attributes is more
flexible since it can be used e.g. for static analyzer annotations or other language
extensions.

Example: std::vector<foo * __capability> -> std::vector<foo *__capability>

Depends on D86775 <https://reviews.llvm.org/D86775> (to apply cleanly)


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D86782

Files:
  clang/docs/ClangFormatStyleOptions.rst
  clang/include/clang/Format/Format.h
  clang/lib/Format/Format.cpp
  clang/lib/Format/FormatToken.h
  clang/lib/Format/FormatTokenLexer.cpp
  clang/lib/Format/TokenAnnotator.cpp
  clang/unittests/Format/FormatTest.cpp

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