ceph/src/boost/boost/type_traits/has_trivial_assign.hpp

   1
   2 //  (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
   3 //  Use, modification and distribution are subject to the Boost Software License,
   4 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   5 //  http://www.boost.org/LICENSE_1_0.txt).
   6 //
   7 //  See http://www.boost.org/libs/type_traits for most recent version including documentation.
   8
   9 #ifndef BOOST_TT_HAS_TRIVIAL_ASSIGN_HPP_INCLUDED
  10 #define BOOST_TT_HAS_TRIVIAL_ASSIGN_HPP_INCLUDED
  11
  12 #include <cstddef> // size_t
  13 #include <boost/type_traits/detail/config.hpp>
  14 #include <boost/type_traits/intrinsics.hpp>
  15 #include <boost/type_traits/integral_constant.hpp>
  16
  17 #if !defined(BOOST_HAS_TRIVIAL_ASSIGN) || defined(BOOST_MSVC) || defined(__GNUC__) || defined(BOOST_INTEL) || defined(__SUNPRO_CC) || defined(__clang__)
  18 #include <boost/type_traits/is_pod.hpp>
  19 #include <boost/type_traits/is_const.hpp>
  20 #include <boost/type_traits/is_volatile.hpp>
  21 #include <boost/type_traits/is_assignable.hpp>
  22 #endif
  23
  24 namespace boost {
  25
  26    template <typename T>
  27    struct has_trivial_assign : public integral_constant < bool,
  28 #ifdef BOOST_HAS_TRIVIAL_ASSIGN
  29       BOOST_HAS_TRIVIAL_ASSIGN(T)
  30 #else
  31       ::boost::is_pod<T>::value && !::boost::is_const<T>::value && !::boost::is_volatile<T>::value
  32 #endif
  33    > {};
  34
  35    template<> struct has_trivial_assign<void> : public false_type{};
  36 #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
  37    template<> struct has_trivial_assign<void const> : public false_type{};
  38    template<> struct has_trivial_assign<void const volatile> : public false_type{};
  39    template<> struct has_trivial_assign<void volatile> : public false_type{};
  40 #endif
  41    template <class T> struct has_trivial_assign<T volatile> : public false_type{};
  42    template <class T> struct has_trivial_assign<T&> : public false_type{};
  43 #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
  44    template <class T> struct has_trivial_assign<T&&> : public false_type{};
  45 #endif
  46    // Arrays are not explictly assignable:
  47    template <typename T, std::size_t N> struct has_trivial_assign<T[N]> : public false_type{};
  48    template <typename T> struct has_trivial_assign<T[]> : public false_type{};
  49
  50 } // namespace boost
  51
  52 #endif // BOOST_TT_HAS_TRIVIAL_ASSIGN_HPP_INCLUDED