63e88f80
 Hu Chunming
提交三方库
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// (C) Copyright Matt Borland 2022.
// Use, modification and distribution are subject to the
// Boost Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// Macros that substitute for STL concepts or typename depending on availability of <concepts>
#ifndef BOOST_MATH_TOOLS_CONCEPTS_HPP
#define BOOST_MATH_TOOLS_CONCEPTS_HPP
// LLVM clang supports concepts but apple's clang does not fully support at version 13
// See: https://en.cppreference.com/w/cpp/compiler_support/20
#if (__cplusplus > 202000L || _MSVC_LANG > 202000L)
# if __has_include(<concepts>) && (!defined(__APPLE__) || (defined(__APPLE__) && defined(__clang__) && __clang__ > 13))
# include <concepts>
# define BOOST_MATH_FLOATING_POINT_TYPE std::floating_point
# else
# define BOOST_MATH_FLOATING_POINT_TYPE typename
# endif
#else
# define BOOST_MATH_FLOATING_POINT_TYPE typename
#endif
#endif // BOOST_MATH_TOOLS_CONCEPTS_HPP
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