40 lines
1.0 KiB
C++
40 lines
1.0 KiB
C++
// (C) Copyright John Maddock 2005.
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_TYPE_TRAITS_INTEGRAL_CONSTANT_HPP
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#define BOOST_TYPE_TRAITS_INTEGRAL_CONSTANT_HPP
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#include <boost/config.hpp>
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#include <boost/mpl/bool.hpp>
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#include <boost/mpl/integral_c.hpp>
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namespace boost{
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#if defined(BOOST_NO_DEPENDENT_TYPES_IN_TEMPLATE_VALUE_PARAMETERS) || defined(__BORLANDC__)
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template <class T, int val>
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#else
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template <class T, T val>
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#endif
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struct integral_constant : public mpl::integral_c<T, val>
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{
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typedef integral_constant<T,val> type;
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};
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template<> struct integral_constant<bool,true> : public mpl::true_
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{
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typedef integral_constant<bool,true> type;
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};
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template<> struct integral_constant<bool,false> : public mpl::false_
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{
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typedef integral_constant<bool,false> type;
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};
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typedef integral_constant<bool,true> true_type;
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typedef integral_constant<bool,false> false_type;
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}
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#endif
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