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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 |