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Remove GCC C++03 fallbacks for decltype and static_assert. 

This means libc++ no longer needs to write extra braces in
static asserts: Ex `static_assert((is_same_v<T, V>), "msg")`.

llvm-svn: 363738
This commit is contained in:
Eric Fiselier 2019-06-18 20:50:25 +00:00
parent 64fbefde6e
commit 5c739665a8
1 changed files with 2 additions and 26 deletions
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28
libcxx/include/__config
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@ -413,10 +413,6 @@ typedef __char32_t char32_t;
#define _LIBCPP_HAS_NO_STRONG_ENUMS
#endif
#if !(__has_feature(cxx_decltype))
#define _LIBCPP_HAS_NO_DECLTYPE
#endif
#if __has_feature(cxx_attributes)
# define _LIBCPP_NORETURN [[noreturn]]
#else
@ -548,7 +544,6 @@ typedef __char32_t char32_t;
#ifndef __GXX_EXPERIMENTAL_CXX0X__
#define _LIBCPP_HAS_NO_CONSTEXPR
#define _LIBCPP_HAS_NO_DECLTYPE
#define _LIBCPP_HAS_NO_NULLPTR
#define _LIBCPP_HAS_NO_UNICODE_CHARS
#define _LIBCPP_HAS_NO_VARIADICS
@ -853,29 +848,10 @@ typedef unsigned int char32_t;
#endif
#ifdef _LIBCPP_CXX03_LANG
# if __has_extension(c_static_assert)
# define static_assert(__b, __m) _Static_assert(__b, __m)
# else
extern "C++" {
template <bool> struct __static_assert_test;
template <> struct __static_assert_test<true> {};
template <unsigned> struct __static_assert_check {};
}
# define static_assert(__b, __m) \
typedef __static_assert_check<sizeof(__static_assert_test<(__b)>)> \
_LIBCPP_CONCAT(__t, __LINE__)
# endif // __has_extension(c_static_assert)
# define static_assert(...) _Static_assert(__VA_ARGS__)
# define decltype(...) __decltype(__VA_ARGS__)
#endif // _LIBCPP_CXX03_LANG
#ifdef _LIBCPP_HAS_NO_DECLTYPE
// GCC 4.6 provides __decltype in all standard modes.
# if __has_keyword(__decltype) || _LIBCPP_CLANG_VER >= 304 || defined(_LIBCPP_COMPILER_GCC)
# define decltype(__x) __decltype(__x)
# else
# define decltype(__x) __typeof__(__x)
# endif
#endif
#ifdef _LIBCPP_HAS_NO_CONSTEXPR
# define _LIBCPP_CONSTEXPR
#else