ceph/src/boost/boost/multi_index/detail/is_function.hpp

   1 /* Copyright 2003-2019 Joaquin M Lopez Munoz.
   2  * Distributed under the Boost Software License, Version 1.0.
   3  * (See accompanying file LICENSE_1_0.txt or copy at
   4  * http://www.boost.org/LICENSE_1_0.txt)
   5  *
   6  * See http://www.boost.org/libs/multi_index for library home page.
   7  */
   8
   9 #ifndef BOOST_MULTI_INDEX_DETAIL_IS_FUNCTION_HPP
  10 #define BOOST_MULTI_INDEX_DETAIL_IS_FUNCTION_HPP
  11
  12 #if defined(_MSC_VER)
  13 #pragma once
  14 #endif
  15
  16 #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
  17 #include <boost/detail/workaround.hpp>
  18
  19 #if !defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)||\
  20     BOOST_WORKAROUND(_LIBCPP_VERSION,<30700)||\
  21     BOOST_WORKAROUND(BOOST_LIBSTDCXX_VERSION,<40802)
  22 /* libc++: std::is_function<void() const> fails,
  23  * https://bugs.llvm.org/show_bug.cgi?id=20084
  24  *
  25  * libstdc++-v3: std::is_function does not support ref-qualified function types,
  26  * https://github.com/gcc-mirror/gcc/commit/
  27  *   2fa630fb50ba29d8e891c52a75aaec261b07874e#
  28  *   diff-6547f965a8d66bf35a6388fcf404aaa3
  29  */
  30
  31 #include <boost/type_traits/is_function.hpp>
  32
  33 namespace boost{namespace multi_index{namespace detail{
  34
  35 template<typename T>
  36 struct is_function:boost::is_function<T>{};
  37
  38 }}} /* namespace boost::multi_index::detail */
  39
  40 #else
  41
  42 #include <type_traits>
  43
  44 namespace boost{namespace multi_index{namespace detail{
  45
  46 template<typename T>
  47 struct is_function:std::is_function<T>{};
  48
  49 }}} /* namespace boost::multi_index::detail */
  50
  51 #endif
  52 #endif