forked from boostorg/bind
61 lines
1.1 KiB
C++
61 lines
1.1 KiB
C++
#ifndef BOOST_BIND_ARG_HPP_INCLUDED
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#define BOOST_BIND_ARG_HPP_INCLUDED
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// MS compatible compilers support #pragma once
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#if defined(_MSC_VER)
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# pragma once
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#endif
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//
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// bind/arg.hpp
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//
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// Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// 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/bind/bind.html for documentation.
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//
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#include <boost/config.hpp>
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#include <boost/is_placeholder.hpp>
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namespace boost
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{
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template< int I > struct arg
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{
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arg()
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{
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}
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template< class T > arg( T const & /* t */ )
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{
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// static assert I == is_placeholder<T>::value
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typedef char T_must_be_placeholder[ I == is_placeholder<T>::value? 1: -1 ];
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}
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};
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template< int I > bool operator==( arg<I> const &, arg<I> const & )
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{
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return true;
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}
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template< int I > struct is_placeholder< arg<I> >
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{
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enum _vt { value = I };
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};
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template< int I > struct is_placeholder< arg<I> (*) () >
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{
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enum _vt { value = I };
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};
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} // namespace boost
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#endif // #ifndef BOOST_BIND_ARG_HPP_INCLUDED
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