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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 | ||
25 | namespace boost | |
26 | { | |
27 | ||
28 | template<bool Eq> struct _arg_eq | |
29 | { | |
30 | }; | |
31 | ||
32 | template<> struct _arg_eq<true> | |
33 | { | |
34 | typedef void type; | |
35 | }; | |
36 | ||
37 | template< 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 | ||
48 | template< 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 | ||
55 | template< int I > struct is_placeholder< arg<I> > | |
56 | { | |
57 | enum _vt { value = I }; | |
58 | }; | |
59 | ||
60 | template< 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 |