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