| 1 | // Copyright Daniel Wallin, David Abrahams 2005. |
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| 2 | // Distributed under the Boost Software License, Version 1.0. |
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| 3 | // (See accompanying file LICENSE_1_0.txt or copy at |
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| 4 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 5 | |
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| 6 | #ifndef BOOST_PARAMETER_AUX_PACK_PARAMETER_REQUIREMENTS_HPP |
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| 7 | #define BOOST_PARAMETER_AUX_PACK_PARAMETER_REQUIREMENTS_HPP |
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| 8 | |
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| 9 | namespace boost { namespace parameter { namespace aux { |
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| 10 | |
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| 11 | // Used to pass static information about parameter requirements through |
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| 12 | // the satisfies() overload set (below). The matched function is never |
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| 13 | // invoked, but its type indicates whether a parameter matches at |
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| 14 | // compile-time. |
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| 15 | template <typename Keyword, typename Predicate, typename HasDefault> |
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| 16 | struct parameter_requirements |
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| 17 | { |
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| 18 | typedef Keyword keyword; |
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| 19 | typedef Predicate predicate; |
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| 20 | typedef HasDefault has_default; |
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| 21 | }; |
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| 22 | }}} // namespace boost::parameter::aux |
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| 23 | |
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| 24 | #endif // include guard |
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| 25 | |
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| 26 | |
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