65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2007 Joel de Guzman
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#ifndef PHOENIX_STATEMENT_FOR_HPP
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#define PHOENIX_STATEMENT_FOR_HPP
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#include <boost/spirit/home/phoenix/core/composite.hpp>
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#include <boost/spirit/home/phoenix/core/compose.hpp>
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namespace boost { namespace phoenix
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{
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struct for_eval
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{
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template <
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typename Env
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, typename Init, typename Cond, typename Step, typename Do>
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struct result
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{
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typedef void type;
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};
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template <
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typename RT, typename Env
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, typename Init, typename Cond, typename Step, typename Do>
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static void
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eval(
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Env const& env
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, Init& init, Cond& cond, Step& step, Do& do_)
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{
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for (init.eval(env); cond.eval(env); step.eval(env))
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do_.eval(env);
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}
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};
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template <typename Init, typename Cond, typename Step>
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struct for_gen
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{
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for_gen(Init const& init, Cond const& cond, Step const& step)
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: init(init), cond(cond), step(step) {}
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template <typename Do>
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actor<typename as_composite<for_eval, Init, Cond, Step, Do>::type>
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operator[](Do const& do_) const
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{
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return compose<for_eval>(init, cond, step, do_);
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}
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Init init;
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Cond cond;
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Step step;
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};
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template <typename Init, typename Cond, typename Step>
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inline for_gen<Init, Cond, Step>
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for_(Init const& init, Cond const& cond, Step const& step)
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{
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return for_gen<Init, Cond, Step>(init, cond, step);
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}
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}}
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#endif
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