| 1 | // Boost Lambda Library -- control_constructs_common.hpp ------------------- |
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| 2 | |
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| 3 | // Copyright (C) 1999, 2000 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi) |
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| 4 | // Copyright (C) 2000 Gary Powell (powellg@amazon.com) |
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| 5 | // |
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| 6 | // Distributed under the Boost Software License, Version 1.0. (See |
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| 7 | // accompanying file LICENSE_1_0.txt or copy at |
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| 8 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 9 | // |
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| 10 | // For more information, see www.boost.org |
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| 11 | |
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| 12 | // -------------------------------------------------------------------------- |
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| 13 | |
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| 14 | #if !defined(BOOST_CONTROL_CONSTRUCTS_COMMON_HPP) |
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| 15 | #define BOOST_CONTROL_CONSTRUCTS_COMMON_HPP |
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| 16 | |
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| 17 | namespace boost { |
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| 18 | namespace lambda { |
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| 19 | |
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| 20 | // special types of lambda functors, used with control structures |
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| 21 | // to guarantee that they are composed correctly. |
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| 22 | |
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| 23 | template<class Tag, class LambdaFunctor> |
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| 24 | class tagged_lambda_functor; |
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| 25 | |
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| 26 | template<class Tag, class Args> |
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| 27 | class tagged_lambda_functor<Tag, lambda_functor<Args> > |
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| 28 | : public lambda_functor<Args> |
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| 29 | { |
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| 30 | public: |
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| 31 | tagged_lambda_functor(const Args& a) : lambda_functor<Args>(a) {} |
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| 32 | |
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| 33 | tagged_lambda_functor(const lambda_functor<Args>& a) |
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| 34 | : lambda_functor<Args>(a) {} |
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| 35 | |
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| 36 | // for the no body cases in control structures. |
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| 37 | tagged_lambda_functor() : lambda_functor<Args>() {} |
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| 38 | }; |
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| 39 | |
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| 40 | } // lambda |
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| 41 | } // boost |
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| 42 | |
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| 43 | #endif // BOOST_CONTROL_CONSTRUCTS_COMMON_HPP |
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