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99 lines
3.1 KiB
99 lines
3.1 KiB
///////////////////////////////////////////////////////////////////////////////
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// end_matcher.hpp
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//
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// Copyright 2008 Eric Niebler. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_END_MATCHER_HPP_EAN_10_04_2005
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#define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_END_MATCHER_HPP_EAN_10_04_2005
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// MS compatible compilers support #pragma once
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#if defined(_MSC_VER)
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# pragma once
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#endif
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#include <boost/assert.hpp>
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#include <boost/xpressive/detail/detail_fwd.hpp>
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#include <boost/xpressive/detail/core/quant_style.hpp>
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#include <boost/xpressive/detail/core/state.hpp>
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#include <boost/xpressive/detail/core/sub_match_impl.hpp>
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#include <boost/xpressive/detail/core/flow_control.hpp>
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namespace boost { namespace xpressive { namespace detail
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{
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///////////////////////////////////////////////////////////////////////////////
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// end_matcher
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//
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struct end_matcher
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: quant_style_assertion
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{
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template<typename BidiIter, typename Next>
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static bool match(match_state<BidiIter> &state, Next const &)
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{
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BidiIter const tmp = state.cur_;
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sub_match_impl<BidiIter> &s0 = state.sub_match(0);
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BOOST_ASSERT(!s0.matched);
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// SPECIAL: if there is a match context on the context stack, then
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// this pattern has been nested within another. pop that context and
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// continue executing.
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if(0 != state.context_.prev_context_)
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{
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if(!pop_context_match(state))
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{
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return false;
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}
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// record the end of sub-match zero
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s0.first = s0.begin_;
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s0.second = tmp;
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s0.matched = true;
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return true;
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}
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else if((state.flags_.match_all_ && !state.eos()) ||
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(state.flags_.match_not_null_ && state.cur_ == s0.begin_))
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{
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return false;
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}
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// record the end of sub-match zero
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s0.first = s0.begin_;
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s0.second = tmp;
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s0.matched = true;
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// Now execute any actions that have been queued
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for(actionable const *actor = state.action_list_.next; 0 != actor; actor = actor->next)
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{
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actor->execute(state.action_args_);
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}
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return true;
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}
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};
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///////////////////////////////////////////////////////////////////////////////
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// independent_end_matcher
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//
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struct independent_end_matcher
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: quant_style_assertion
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{
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template<typename BidiIter, typename Next>
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bool match(match_state<BidiIter> &state, Next const &) const
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{
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// Now execute any actions that have been queued
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for(actionable const *actor = state.action_list_.next; 0 != actor; actor = actor->next)
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{
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actor->execute(state.action_args_);
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}
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return true;
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}
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};
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}}}
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#endif
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