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