ceph/src/boost/libs/type_traits/include/boost/type_traits/has_trivial_constructor.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_CONSTRUCTOR_HPP_INCLUDED
  10 #define BOOST_TT_HAS_TRIVIAL_CONSTRUCTOR_HPP_INCLUDED
  11
  12 #include <boost/type_traits/intrinsics.hpp>
  13 #include <boost/type_traits/is_pod.hpp>
  14 #include <boost/type_traits/is_default_constructible.hpp>
  15
  16 #ifdef BOOST_HAS_TRIVIAL_CONSTRUCTOR
  17 #ifdef BOOST_HAS_SGI_TYPE_TRAITS
  18 #include <boost/type_traits/is_same.hpp>
  19 #elif defined(__GNUC__) || defined(__SUNPRO_CC)
  20 #include <boost/type_traits/is_volatile.hpp>
  21 #ifdef BOOST_INTEL
  22 #include <boost/type_traits/is_pod.hpp>
  23 #endif
  24 #endif
  25 #endif
  26
  27
  28 #if (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 409)) || defined(BOOST_CLANG) || (defined(__SUNPRO_CC) && defined(BOOST_HAS_TRIVIAL_CONSTRUCTOR))
  29 #include <boost/type_traits/is_default_constructible.hpp>
  30 #define BOOST_TT_TRIVIAL_CONSTRUCT_FIX && is_default_constructible<T>::value
  31 #else
  32 //
  33 // Mot all compilers, particularly older GCC versions can handle the fix above.
  34 #define BOOST_TT_TRIVIAL_CONSTRUCT_FIX
  35 #endif
  36
  37 namespace boost {
  38
  39 template <typename T> struct has_trivial_constructor
  40 #ifdef BOOST_HAS_TRIVIAL_CONSTRUCTOR
  41    : public integral_constant <bool, ((::boost::is_pod<T>::value || BOOST_HAS_TRIVIAL_CONSTRUCTOR(T)) BOOST_TT_TRIVIAL_CONSTRUCT_FIX)>{};
  42 #else
  43    : public integral_constant <bool, ::boost::is_pod<T>::value>{};
  44 #endif
  45
  46 template <> struct has_trivial_constructor<void> : public boost::false_type{};
  47 template <> struct has_trivial_constructor<void const> : public boost::false_type{};
  48 template <> struct has_trivial_constructor<void const volatile> : public boost::false_type{};
  49 template <> struct has_trivial_constructor<void volatile> : public boost::false_type{};
  50
  51 template <class T> struct has_trivial_default_constructor : public has_trivial_constructor<T> {};
  52
  53 #undef BOOST_TT_TRIVIAL_CONSTRUCT_FIX
  54
  55 } // namespace boost
  56
  57 #endif // BOOST_TT_HAS_TRIVIAL_CONSTRUCTOR_HPP_INCLUDED