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1 | #ifndef BOOST_IS_PLACEHOLDER_HPP_INCLUDED | |
2 | #define BOOST_IS_PLACEHOLDER_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 | // is_placeholder.hpp - TR1 is_placeholder metafunction | |
12 | // | |
13 | // Copyright (c) 2006 Peter Dimov | |
14 | // | |
15 | // Distributed under the Boost Software License, Version 1.0. | |
16 | // | |
17 | // See accompanying file LICENSE_1_0.txt or copy at | |
18 | // http://www.boost.org/LICENSE_1_0.txt | |
19 | ||
20 | ||
21 | namespace boost | |
22 | { | |
23 | ||
24 | template< class T > struct is_placeholder | |
25 | { | |
26 | enum _vt { value = 0 }; | |
27 | }; | |
28 | ||
29 | } // namespace boost | |
30 | ||
31 | #endif // #ifndef BOOST_IS_PLACEHOLDER_HPP_INCLUDED |