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Diffstat (limited to 'include/llvm/Support/Compiler.h')
| -rw-r--r-- | include/llvm/Support/Compiler.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/llvm/Support/Compiler.h b/include/llvm/Support/Compiler.h index d0b186ea7c..0ae02e85c5 100644 --- a/include/llvm/Support/Compiler.h +++ b/include/llvm/Support/Compiler.h @@ -19,6 +19,25 @@ # define __has_feature(x) 0 #endif +/// LLVM_HAS_RVALUE_REFERENCES - Does the compiler provide r-value references? +/// This implies that <utility> provides the one-argument std::move; it +/// does not imply the existence of any other C++ library features. +#if (__has_feature(cxx_rvalue_references) \ + || defined(__GXX_EXPERIMENTAL_CXX0X__) \ + || _MSC_VER >= 1600) +#define LLVM_USE_RVALUE_REFERENCES 1 +#else +#define LLVM_USE_RVALUE_REFERENCES 0 +#endif + +/// llvm_move - Expands to ::std::move if the compiler supports +/// r-value references; otherwise, expands to the argument. +#if LLVM_USE_RVALUE_REFERENCES +#define llvm_move(value) (::std::move(arg)) +#else +#define llvm_move(value) (value) +#endif + /// 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 /// not accessible from outside it. Can also be used to mark variables and |