1#ifndef BOOST_BIND_ARG_HPP_INCLUDED
2#define BOOST_BIND_ARG_HPP_INCLUDED
3
4// MS compatible compilers support #pragma once
5
6#if defined(_MSC_VER) && (_MSC_VER >= 1020)
7# pragma once
8#endif
9
10//
11// bind/arg.hpp
12//
13// Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
14//
15// Distributed under the Boost Software License, Version 1.0. (See
16// accompanying file LICENSE_1_0.txt or copy at
17// http://www.boost.org/LICENSE_1_0.txt)
18//
19// See http://www.boost.org/libs/bind/bind.html for documentation.
20//
21
22#include <boost/config.hpp>
23#include <boost/is_placeholder.hpp>
24
25namespace boost
26{
27
28template<bool Eq> struct _arg_eq
29{
30};
31
32template<> struct _arg_eq<true>
33{
34 typedef void type;
35};
36
37template< int I > struct arg
38{
39 BOOST_CONSTEXPR arg()
40 {
41 }
42
43 template< class T > BOOST_CONSTEXPR arg( T const & /* t */, typename _arg_eq< I == is_placeholder<T>::value >::type * = 0 )
44 {
45 }
46};
47
48template< int I > BOOST_CONSTEXPR bool operator==( arg<I> const &, arg<I> const & )
49{
50 return true;
51}
52
53#if !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
54
55template< int I > struct is_placeholder< arg<I> >
56{
57 enum _vt { value = I };
58};
59
60template< int I > struct is_placeholder< arg<I> (*) () >
61{
62 enum _vt { value = I };
63};
64
65#endif
66
67} // namespace boost
68
69#endif // #ifndef BOOST_BIND_ARG_HPP_INCLUDED
70