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//////////////////////////////////////////////////////////////////////////////
// (C) Copyright John Maddock 2000.
// (C) Copyright Ion Gaztanaga 2005-2012.
//
// Distributed under 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)
//
// See http://www.boost.org/libs/container for documentation.
//
// The alignment_of implementation comes from John Maddock's boost::alignment_of code
//
//////////////////////////////////////////////////////////////////////////////
#ifndef BOOST_CONTAINER_CONTAINER_DETAIL_TYPE_TRAITS_HPP
#define BOOST_CONTAINER_CONTAINER_DETAIL_TYPE_TRAITS_HPP
#if (defined _MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif
#include "config_begin.hpp"
#include <boost/move/move.hpp>
namespace boost {
namespace container {
namespace container_detail {
struct nat{};
template <typename U>
struct LowPriorityConversion
{
// Convertible from T with user-defined-conversion rank.
LowPriorityConversion(const U&) { }
};
//boost::alignment_of yields to 10K lines of preprocessed code, so we
//need an alternative
template <typename T> struct alignment_of;
template <typename T>
struct alignment_of_hack
{
char c;
T t;
alignment_of_hack();
};
template <unsigned A, unsigned S>
struct alignment_logic
{
enum{ value = A < S ? A : S };
};
template< typename T >
struct alignment_of
{
enum{ value = alignment_logic
< sizeof(alignment_of_hack<T>) - sizeof(T)
, sizeof(T)>::value };
};
//This is not standard, but should work with all compilers
union max_align
{
char char_;
short short_;
int int_;
long long_;
#ifdef BOOST_HAS_LONG_LONG
long long long_long_;
#endif
float float_;
double double_;
long double long_double_;
void * void_ptr_;
};
template<class T>
struct remove_reference
{
typedef T type;
};
template<class T>
struct remove_reference<T&>
{
typedef T type;
};
#ifndef BOOST_NO_RVALUE_REFERENCES
template<class T>
struct remove_reference<T&&>
{
typedef T type;
};
#else
template<class T>
struct remove_reference< ::boost::rv<T> >
{
typedef T type;
};
#endif
template<class T>
struct is_reference
{
enum { value = false };
};
template<class T>
struct is_reference<T&>
{
enum { value = true };
};
template<class T>
struct is_pointer
{
enum { value = false };
};
template<class T>
struct is_pointer<T*>
{
enum { value = true };
};
template <typename T>
struct add_reference
{
typedef T& type;
};
template<class T>
struct add_reference<T&>
{
typedef T& type;
};
template<>
struct add_reference<void>
{
typedef nat &type;
};
template<>
struct add_reference<const void>
{
typedef const nat &type;
};
template <class T>
struct add_const_reference
{ typedef const T &type; };
template <class T>
struct add_const_reference<T&>
{ typedef T& type; };
template <typename T, typename U>
struct is_same
{
typedef char yes_type;
struct no_type
{
char padding[8];
};
template <typename V>
static yes_type is_same_tester(V*, V*);
static no_type is_same_tester(...);
static T *t;
static U *u;
static const bool value = sizeof(yes_type) == sizeof(is_same_tester(t,u));
};
template<class T>
struct remove_const
{
typedef T type;
};
template<class T>
struct remove_const< const T>
{
typedef T type;
};
template<class T>
struct remove_ref_const
{
typedef typename remove_const< typename remove_reference<T>::type >::type type;
};
} // namespace container_detail
} //namespace container {
} //namespace boost {
#include <boost/container/detail/config_end.hpp>
#endif //#ifndef BOOST_CONTAINER_CONTAINER_DETAIL_TYPE_TRAITS_HPP
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