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87 lines
2.4 KiB
87 lines
2.4 KiB
/*============================================================================== |
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Copyright (c) 2001-2010 Joel de Guzman |
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Copyright (c) 2010 Thomas Heller |
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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 BOOST_PHOENIX_STATEMENT_FOR_HPP |
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#define BOOST_PHOENIX_STATEMENT_FOR_HPP |
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#include <boost/phoenix/core/limits.hpp> |
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#include <boost/phoenix/core/call.hpp> |
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#include <boost/phoenix/core/expression.hpp> |
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#include <boost/phoenix/core/meta_grammar.hpp> |
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BOOST_PHOENIX_DEFINE_EXPRESSION( |
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(boost)(phoenix)(for_) |
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, (meta_grammar) // Cond |
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(meta_grammar) // Init |
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(meta_grammar) // Step |
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(meta_grammar) // Do |
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) |
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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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typedef void result_type; |
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template < |
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typename Init |
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, typename Cond |
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, typename Step |
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, typename Do |
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, typename Context |
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> |
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result_type |
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operator()( |
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Init const& init |
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, Cond const& cond |
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, Step const& step |
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, Do const& do_ |
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, Context & ctx |
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) const |
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{ |
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for(boost::phoenix::eval(init, ctx); boost::phoenix::eval(cond, ctx); boost::phoenix::eval(step, ctx)) |
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boost::phoenix::eval(do_, ctx); |
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} |
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}; |
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template <typename Dummy> |
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struct default_actions::when<rule::for_, Dummy> |
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: call<for_eval, Dummy> |
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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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typename expression::for_<Init, Cond, Step, Do>::type const |
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operator[](Do const& do_) const |
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{ |
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return |
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expression:: |
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for_<Init, Cond, Step, Do>:: |
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make(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 |
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for_gen<Init, Cond, Step> const |
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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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