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[Support] Add LLVM_CONSTEXPR.

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Marks a decl as constexpr if the compiler supports it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172508 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael J. Spencer 2013-01-15 05:01:39 +00:00
parent 47f3934021
commit b5f8cd5bb0
1 changed files with 6 additions and 0 deletions
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6
include/llvm/Support/Compiler.h
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@ -95,6 +95,12 @@
#define LLVM_OVERRIDE #define LLVM_OVERRIDE
#endif #endif
#if __has_feature(cxx_constexpr) || defined(__GXX_EXPERIMENTAL_CXX0X__)
# define LLVM_CONSTEXPR constexpr
#else
# define LLVM_CONSTEXPR
#endif
/// LLVM_LIBRARY_VISIBILITY - If a class marked with this attribute is linked /// LLVM_LIBRARY_VISIBILITY - If a class marked with this attribute is linked
/// into a shared library, then the class should be private to the library and /// into a shared library, then the class should be private to the library and
/// not accessible from outside it. Can also be used to mark variables and /// not accessible from outside it. Can also be used to mark variables and