ceph/src/boost/boost/math/tools/concepts.hpp

   1 //  (C) Copyright Matt Borland 2022.
   2 //  Use, modification and distribution are subject to the
   3 //  Boost Software License, Version 1.0. (See accompanying file
   4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5 //
   6 //  Macros that substitute for STL concepts or typename depending on availability of <concepts>
   7
   8 #ifndef BOOST_MATH_TOOLS_CONCEPTS_HPP
   9 #define BOOST_MATH_TOOLS_CONCEPTS_HPP
  10
  11 // LLVM clang supports concepts but apple's clang does not fully support at version 13
  12 // See: https://en.cppreference.com/w/cpp/compiler_support/20
  13 #if (__cplusplus > 202000L || _MSVC_LANG > 202000L)
  14 #  if __has_include(<concepts>) && (!defined(__APPLE__) || (defined(__APPLE__) && defined(__clang__) && __clang__ > 13))
  15 #    include <concepts>
  16 #    define BOOST_MATH_FLOATING_POINT_TYPE std::floating_point
  17 #  else
  18 #    define BOOST_MATH_FLOATING_POINT_TYPE typename
  19 #  endif
  20 #else
  21 #  define BOOST_MATH_FLOATING_POINT_TYPE typename
  22 #endif
  23
  24 #endif // BOOST_MATH_TOOLS_CONCEPTS_HPP