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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