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40 lines
1.2 KiB
40 lines
1.2 KiB
3 years ago
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///////////////////////////////////////////////////////////////////////////////
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// assert_bos_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_ASSERT_BOS_MATCHER_HPP_EAN_10_04_2005
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#define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_ASSERT_BOS_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/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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namespace boost { namespace xpressive { namespace detail
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{
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///////////////////////////////////////////////////////////////////////////////
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// assert_bos_matcher
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// match the beginning of the sequence (\A)
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struct assert_bos_matcher
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{
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BOOST_XPR_QUANT_STYLE(quant_none, 0, true)
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template<typename BidiIter, typename Next>
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static bool match(match_state<BidiIter> &state, Next const &next)
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{
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return state.bos() && next.match(state);
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}
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};
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}}}
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#endif
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