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// (C) Copyright John Maddock 2007.
// Use, modification and distribution are subject to 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/type_traits for most recent version including documentation.
#ifndef BOOST_TT_MAKE_UNSIGNED_HPP_INCLUDED
#define BOOST_TT_MAKE_UNSIGNED_HPP_INCLUDED
#include <boost/type_traits/conditional.hpp>
#include <boost/type_traits/is_integral.hpp>
#include <boost/type_traits/is_signed.hpp>
#include <boost/type_traits/is_unsigned.hpp>
#include <boost/type_traits/is_enum.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/remove_cv.hpp>
#include <boost/type_traits/is_const.hpp>
#include <boost/type_traits/is_volatile.hpp>
#include <boost/type_traits/add_const.hpp>
#include <boost/type_traits/add_volatile.hpp>
#include <boost/static_assert.hpp>
namespace boost {
template <class T>
struct make_unsigned
{
private:
BOOST_STATIC_ASSERT_MSG((::boost::is_integral<T>::value || ::boost::is_enum<T>::value), "The template argument to make_unsigned must be an integer or enum type.");
BOOST_STATIC_ASSERT_MSG((! ::boost::is_same<typename remove_cv<T>::type, bool>::value), "The template argument to make_unsigned must not be the type bool");
typedef typename remove_cv<T>::type t_no_cv;
typedef typename conditional<
(::boost::is_unsigned<T>::value && ::boost::is_integral<T>::value
&& ! ::boost::is_same<t_no_cv, char>::value
&& ! ::boost::is_same<t_no_cv, wchar_t>::value
&& ! ::boost::is_same<t_no_cv, bool>::value),
T,
typename conditional<
(::boost::is_integral<T>::value
&& ! ::boost::is_same<t_no_cv, char>::value
&& ! ::boost::is_same<t_no_cv, wchar_t>::value
&& ! ::boost::is_same<t_no_cv, bool>::value),
typename conditional<
is_same<t_no_cv, signed char>::value,
unsigned char,
typename conditional<
is_same<t_no_cv, short>::value,
unsigned short,
typename conditional<
is_same<t_no_cv, int>::value,
unsigned int,
typename conditional<
is_same<t_no_cv, long>::value,
unsigned long,
#if defined(BOOST_HAS_LONG_LONG)
#ifdef BOOST_HAS_INT128
typename conditional<
sizeof(t_no_cv) == sizeof(boost::ulong_long_type),
boost::ulong_long_type,
boost::uint128_type
>::type
#else
boost::ulong_long_type
#endif
#elif defined(BOOST_HAS_MS_INT64)
unsigned __int64
#else
unsigned long
#endif
>::type
>::type
>::type
>::type,
// Not a regular integer type:
typename conditional<
sizeof(t_no_cv) == sizeof(unsigned char),
unsigned char,
typename conditional<
sizeof(t_no_cv) == sizeof(unsigned short),
unsigned short,
typename conditional<
sizeof(t_no_cv) == sizeof(unsigned int),
unsigned int,
typename conditional<
sizeof(t_no_cv) == sizeof(unsigned long),
unsigned long,
#if defined(BOOST_HAS_LONG_LONG)
#ifdef BOOST_HAS_INT128
typename conditional<
sizeof(t_no_cv) == sizeof(boost::ulong_long_type),
boost::ulong_long_type,
boost::uint128_type
>::type
#else
boost::ulong_long_type
#endif
#elif defined(BOOST_HAS_MS_INT64)
unsigned __int64
#else
unsigned long
#endif
>::type
>::type
>::type
>::type
>::type
>::type base_integer_type;
// Add back any const qualifier:
typedef typename conditional<
is_const<T>::value,
typename add_const<base_integer_type>::type,
base_integer_type
>::type const_base_integer_type;
public:
// Add back any volatile qualifier:
typedef typename conditional<
is_volatile<T>::value,
typename add_volatile<const_base_integer_type>::type,
const_base_integer_type
>::type type;
};
#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
template <class T> using make_unsigned_t = typename make_unsigned<T>::type;
#endif
} // namespace boost
#endif // BOOST_TT_ADD_REFERENCE_HPP_INCLUDED
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