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Define RAPIDJSON_HAS_CXX11_RVALUE_REFS directly in clang

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This makes no difference except that it avoids "warning: macro expansion
producing 'defined' has undefined behavior" messages.
This commit is contained in:
Bruce Stephens 2016-04-25 12:32:14 +01:00
parent fdf665d637
commit ee4207b3f0
1 changed files with 5 additions and 1 deletions
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6
include/rapidjson/rapidjson.h
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@ -529,8 +529,12 @@ RAPIDJSON_NAMESPACE_END
#ifndef RAPIDJSON_HAS_CXX11_RVALUE_REFS
#if defined(__clang__)
#define RAPIDJSON_HAS_CXX11_RVALUE_REFS __has_feature(cxx_rvalue_references) && \
#if __has_feature(cxx_rvalue_references) && \
(defined(_LIBCPP_VERSION) || defined(__GLIBCXX__) && __GLIBCXX__ >= 20080306)
#define RAPIDJSON_HAS_CXX11_RVALUE_REFS 1
#else
#define RAPIDJSON_HAS_CXX11_RVALUE_REFS 0
#endif
#elif (defined(RAPIDJSON_GNUC) && (RAPIDJSON_GNUC >= RAPIDJSON_VERSION_CODE(4,3,0)) && defined(__GXX_EXPERIMENTAL_CXX0X__)) || \
(defined(_MSC_VER) && _MSC_VER >= 1600)