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