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// (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, Howard
// Hinnant & John Maddock 2000.
// 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_ADD_CONST_HPP_INCLUDED
#define BOOST_TT_ADD_CONST_HPP_INCLUDED
#include <boost/type_traits/detail/config.hpp>
namespace boost {
// * convert a type T to const type - add_const<T>
// this is not required since the result is always
// the same as "T const", but it does suppress warnings
// from some compilers:
#if defined(BOOST_MSVC)
// This bogus warning will appear when add_const is applied to a
// const volatile reference because we can't detect const volatile
// references with MSVC6.
# pragma warning(push)
# pragma warning(disable:4181) // warning C4181: qualifier applied to reference type ignored
#endif
template <class T> struct add_const
{
typedef T const type;
};
#if defined(BOOST_MSVC)
# pragma warning(pop)
#endif
template <class T> struct add_const<T&>
{
typedef T& type;
};
} // namespace boost
#endif // BOOST_TT_ADD_CONST_HPP_INCLUDED
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