[PATCH] D135128: [clang][cli] Remove repetitive macro invocations

[Jan Svoboda via Phabricator via cfe-commits]

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Since we now only support Visual Studio 2019 16.7 and newer, we're able to use the /Zc:preprocessor flag that turns on the standards-conforming preprocessor that (among other things) correctly expands `__VA_ARGS__`. This enables us to get rid of some repetitive boilerplate in Clang's command-line parser.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D135128

Files:
  clang/lib/Frontend/CompilerInvocation.cpp

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