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Teach __libcpp_is_floating_point that __fp16 and _Float16 are 

floating-point types.

rdar://problem/40377353

llvm-svn: 333103
This commit is contained in:
Akira Hatanaka 2018-05-23 17:31:09 +00:00
parent ef33edd9b5
commit ad3be5c454
2 changed files with 26 additions and 0 deletions
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4
libcxx/include/type_traits
View File

@ -733,6 +733,10 @@ _LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_integral_v
// is_floating_point
template <class _Tp> struct __libcpp_is_floating_point : public false_type {};
template <> struct __libcpp_is_floating_point<__fp16> : public true_type {};
#ifdef __FLT16_MANT_DIG__
template <> struct __libcpp_is_floating_point<_Float16> : public true_type {};
#endif
template <> struct __libcpp_is_floating_point<float> : public true_type {};
template <> struct __libcpp_is_floating_point<double> : public true_type {};
template <> struct __libcpp_is_floating_point<long double> : public true_type {};

22
libcxx/test/libcxx/type_traits/is_floating_point.pass.cpp Normal file
View File

@ -0,0 +1,22 @@
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// <type_traits>
//
// Test that is_floating_point<T>::value is true when T=__fp16 or T=_Float16.
#include <type_traits>
int main() {
static_assert(std::is_floating_point<__fp16>::value, "");
#ifdef __FLT16_MANT_DIG__
static_assert(std::is_floating_point<_Float16>::value, "");
#endif
return 0;
}