forked from OSchip/llvm-project
Base isPodLike on is_trivially_copyable for GCC 5 and MSVC
It would be nice to get rid of the version checks here, but that will have to wait until libstdc++ is upgraded to 5.0 everywhere ... llvm-svn: 230021
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@ -28,9 +28,17 @@ namespace llvm {
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/// type can be copied around with memcpy instead of running ctors etc.
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/// type can be copied around with memcpy instead of running ctors etc.
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template <typename T>
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template <typename T>
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struct isPodLike {
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struct isPodLike {
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#if __has_feature(is_trivially_copyable)
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// std::is_trivially copyable is available in libc++ with clang, libstdc++
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// that comes with GCC 5 and MSVC 2013.
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#if (__has_feature(is_trivially_copyable) && defined(_LIBCPP_VERSION)) || \
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(defined(__GNUC__) && __GNUC__ >= 5) || defined(_MSC_VER)
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// If the compiler supports the is_trivially_copyable trait use it, as it
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// If the compiler supports the is_trivially_copyable trait use it, as it
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// matches the definition of isPodLike closely.
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// matches the definition of isPodLike closely.
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static const bool value = std::is_trivially_copyable<T>::value;
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#elif __has_feature(is_trivially_copyable)
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// Use the internal name if the compiler supports is_trivially_copyable but we
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// don't know if the standard library does. This is the case for clang in
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// conjunction with libstdc++ from GCC 4.x.
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static const bool value = __is_trivially_copyable(T);
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static const bool value = __is_trivially_copyable(T);
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#else
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#else
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// If we don't know anything else, we can (at least) assume that all non-class
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// If we don't know anything else, we can (at least) assume that all non-class
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