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Support: Drop LLVM_ATTRIBUTE_UNUSED_RESULT 

Uses of this have all been updated to use LLVM_NODISCARD, which
matches the C++17 [[nodiscard]] semantics rather than those of GCC's
__attribute__((warn_unused_result)).

llvm-svn: 284367
This commit is contained in:
Justin Bogner 2016-10-17 07:37:11 +00:00
parent fe183d7e96
commit 73fc15a989
2 changed files with 4 additions and 9 deletions
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4
llvm/docs/ReleaseNotes.rst
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@ -41,6 +41,10 @@ Non-comprehensive list of changes in this release
functionality, or simply have a lot to talk about), see the `NOTE` below
for adding a new subsection.
* The definition and uses of LLVM_ATRIBUTE_UNUSED_RESULT in the LLVM source
were replaced with LLVM_NODISCARD, which matches the C++17 [[nodiscard]]
semantics rather than gcc's __attribute__((warn_unused_result)).
* ... next change ...
.. NOTE

9
llvm/include/llvm/Support/Compiler.h
View File

@ -130,15 +130,6 @@
#define LLVM_ATTRIBUTE_USED
#endif
/// LLVM_ATTRIBUTE_UNUSED_RESULT - Deprecated. Use LLVM_NODISCARD instead.
#if __has_attribute(warn_unused_result) || LLVM_GNUC_PREREQ(3, 4, 0)
#define LLVM_ATTRIBUTE_UNUSED_RESULT __attribute__((__warn_unused_result__))
#elif defined(_MSC_VER)
#define LLVM_ATTRIBUTE_UNUSED_RESULT _Check_return_
#else
#define LLVM_ATTRIBUTE_UNUSED_RESULT
#endif
/// LLVM_NODISCARD - Warn if a type or return value is discarded.
#if __cplusplus > 201402L && __has_cpp_attribute(nodiscard)
#define LLVM_NODISCARD [[nodiscard]]