1 // Boost Lambda Library -- control_constructs_common.hpp -------------------
3 // Copyright (C) 1999, 2000 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
4 // Copyright (C) 2000 Gary Powell (powellg@amazon.com)
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)
10 // For more information, see www.boost.org
12 // --------------------------------------------------------------------------
14 #if !defined(BOOST_CONTROL_CONSTRUCTS_COMMON_HPP)
15 #define BOOST_CONTROL_CONSTRUCTS_COMMON_HPP
20 // special types of lambda functors, used with control structures
21 // to guarantee that they are composed correctly.
23 template<class Tag, class LambdaFunctor>
24 class tagged_lambda_functor;
26 template<class Tag, class Args>
27 class tagged_lambda_functor<Tag, lambda_functor<Args> >
28 : public lambda_functor<Args>
31 tagged_lambda_functor(const Args& a) : lambda_functor<Args>(a) {}
33 tagged_lambda_functor(const lambda_functor<Args>& a)
34 : lambda_functor<Args>(a) {}
36 // for the no body cases in control structures.
37 tagged_lambda_functor() : lambda_functor<Args>() {}
43 #endif // BOOST_CONTROL_CONSTRUCTS_COMMON_HPP