47 lines
1.3 KiB
Plaintext
47 lines
1.3 KiB
Plaintext
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// (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, Howard
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// Hinnant & John Maddock 2000.
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// Use, modification and distribution are subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt).
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//
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// See http://www.boost.org/libs/type_traits for most recent version including documentation.
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#ifndef BOOST_TT_ADD_CONST_HPP_INCLUDED
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#define BOOST_TT_ADD_CONST_HPP_INCLUDED
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#include <boost/type_traits/detail/config.hpp>
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namespace boost {
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// * convert a type T to const type - add_const<T>
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// this is not required since the result is always
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// the same as "T const", but it does suppress warnings
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// from some compilers:
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#if defined(BOOST_MSVC)
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// This bogus warning will appear when add_const is applied to a
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// const volatile reference because we can't detect const volatile
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// references with MSVC6.
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# pragma warning(push)
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# pragma warning(disable:4181) // warning C4181: qualifier applied to reference type ignored
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#endif
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template <class T> struct add_const
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{
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typedef T const type;
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};
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#if defined(BOOST_MSVC)
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# pragma warning(pop)
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#endif
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template <class T> struct add_const<T&>
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{
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typedef T& type;
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};
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} // namespace boost
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#endif // BOOST_TT_ADD_CONST_HPP_INCLUDED
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