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70 lines
1.8 KiB
70 lines
1.8 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_WHILE_HPP |
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#define BOOST_PHOENIX_STATEMENT_WHILE_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)(while_) |
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, (meta_grammar) // Cond |
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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 while_eval |
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{ |
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typedef void result_type; |
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template <typename Cond, typename Do, typename Context> |
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result_type |
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operator()(Cond const& cond, Do const& do_, Context & ctx) const |
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{ |
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while(boost::phoenix::eval(cond, ctx)) |
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{ |
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boost::phoenix::eval(do_, ctx); |
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} |
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} |
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}; |
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template <typename Dummy> |
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struct default_actions::when<rule::while_, Dummy> |
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: call<while_eval, Dummy> |
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{}; |
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template <typename Cond> |
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struct while_gen |
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{ |
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while_gen(Cond const& cond) : cond(cond) {} |
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template <typename Do> |
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typename expression::while_<Cond, Do>::type const |
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operator[](Do const& do_) const |
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{ |
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return expression::while_<Cond, Do>::make(cond, do_); |
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} |
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Cond const& cond; |
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}; |
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template <typename Cond> |
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inline |
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while_gen<Cond> const |
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while_(Cond const& cond) |
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{ |
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return while_gen<Cond>(cond); |
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} |
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}} |
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#endif
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