[libcxx-commits] [PATCH] D147226: [libc++] Systematically define a macro to check whether a feature is unavailable

[Louis Dionne via Phabricator via libcxx-commits]

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Previously, we inconsistently defined whether a feature was unavailable
on a given deployment target. We would have availability attributes for
all features, but only some features had the equivalent of a _HAS_NO_FOO
macro in the form of the DISABLE_FTM___foo macros. Instead, systematically
define a _HAS_NO_FOO macro, which makes it easier to understand how to
add availability markup for a new platform.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D147226

Files:
  libcxx/include/__availability
  libcxx/include/version
  libcxx/test/std/language.support/support.limits/support.limits.general/atomic.version.compile.pass.cpp
  libcxx/test/std/language.support/support.limits/support.limits.general/barrier.version.compile.pass.cpp
  libcxx/test/std/language.support/support.limits/support.limits.general/filesystem.version.compile.pass.cpp
  libcxx/test/std/language.support/support.limits/support.limits.general/latch.version.compile.pass.cpp
  libcxx/test/std/language.support/support.limits/support.limits.general/semaphore.version.compile.pass.cpp
  libcxx/test/std/language.support/support.limits/support.limits.general/shared_mutex.version.compile.pass.cpp
  libcxx/test/std/language.support/support.limits/support.limits.general/version.version.compile.pass.cpp
  libcxx/utils/generate_feature_test_macro_components.py

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