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668 lines
21 KiB
668 lines
21 KiB
/*
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*
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* Copyright (c) 1998-2009
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* John Maddock
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*
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* Use, modification and distribution are subject to the
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* Boost 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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*
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*/
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/*
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* LOCATION: see http://www.boost.org for most recent version.
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* FILE match_results.cpp
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* VERSION see <boost/version.hpp>
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* DESCRIPTION: Declares template class match_results.
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*/
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#ifndef BOOST_REGEX_V5_MATCH_RESULTS_HPP
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#define BOOST_REGEX_V5_MATCH_RESULTS_HPP
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namespace boost{
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#ifdef BOOST_REGEX_MSVC
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#pragma warning(push)
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#pragma warning(disable : 4251 4459)
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#if BOOST_REGEX_MSVC < 1700
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# pragma warning(disable : 4231)
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#endif
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# if BOOST_REGEX_MSVC < 1600
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# pragma warning(disable : 4660)
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# endif
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#endif
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namespace BOOST_REGEX_DETAIL_NS{
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class named_subexpressions;
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}
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template <class BidiIterator, class Allocator>
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class match_results
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{
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private:
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typedef std::vector<sub_match<BidiIterator>, Allocator> vector_type;
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public:
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typedef sub_match<BidiIterator> value_type;
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typedef typename std::allocator_traits<Allocator>::value_type const & const_reference;
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typedef const_reference reference;
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typedef typename vector_type::const_iterator const_iterator;
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typedef const_iterator iterator;
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typedef typename std::iterator_traits<
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BidiIterator>::difference_type difference_type;
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typedef typename std::allocator_traits<Allocator>::size_type size_type;
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typedef Allocator allocator_type;
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typedef typename std::iterator_traits<
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BidiIterator>::value_type char_type;
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typedef std::basic_string<char_type> string_type;
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typedef BOOST_REGEX_DETAIL_NS::named_subexpressions named_sub_type;
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// construct/copy/destroy:
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explicit match_results(const Allocator& a = Allocator())
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: m_subs(a), m_base(), m_null(), m_last_closed_paren(0), m_is_singular(true) {}
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//
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// IMPORTANT: in the code below, the crazy looking checks around m_is_singular are
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// all required because it is illegal to copy a singular iterator.
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// See https://svn.boost.org/trac/boost/ticket/3632.
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//
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match_results(const match_results& m)
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: m_subs(m.m_subs), m_base(), m_null(), m_named_subs(m.m_named_subs), m_last_closed_paren(m.m_last_closed_paren), m_is_singular(m.m_is_singular)
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{
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if(!m_is_singular)
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{
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m_base = m.m_base;
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m_null = m.m_null;
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}
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}
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match_results& operator=(const match_results& m)
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{
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m_subs = m.m_subs;
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m_named_subs = m.m_named_subs;
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m_last_closed_paren = m.m_last_closed_paren;
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m_is_singular = m.m_is_singular;
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if(!m_is_singular)
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{
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m_base = m.m_base;
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m_null = m.m_null;
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}
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return *this;
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}
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~match_results(){}
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// size:
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size_type size() const
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{ return empty() ? 0 : m_subs.size() - 2; }
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size_type max_size() const
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{ return m_subs.max_size(); }
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bool empty() const
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{ return m_subs.size() < 2; }
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// element access:
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difference_type length(int sub = 0) const
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{
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if(m_is_singular)
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raise_logic_error();
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sub += 2;
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if((sub < (int)m_subs.size()) && (sub > 0))
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return m_subs[sub].length();
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return 0;
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}
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difference_type length(const char_type* sub) const
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{
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if(m_is_singular)
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raise_logic_error();
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const char_type* sub_end = sub;
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while(*sub_end) ++sub_end;
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return length(named_subexpression_index(sub, sub_end));
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}
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template <class charT>
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difference_type length(const charT* sub) const
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{
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if(m_is_singular)
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raise_logic_error();
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const charT* sub_end = sub;
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while(*sub_end) ++sub_end;
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return length(named_subexpression_index(sub, sub_end));
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}
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template <class charT, class Traits, class A>
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difference_type length(const std::basic_string<charT, Traits, A>& sub) const
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{
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return length(sub.c_str());
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}
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difference_type position(size_type sub = 0) const
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{
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if(m_is_singular)
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raise_logic_error();
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sub += 2;
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if(sub < m_subs.size())
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{
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const sub_match<BidiIterator>& s = m_subs[sub];
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if(s.matched || (sub == 2))
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{
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return std::distance((BidiIterator)(m_base), (BidiIterator)(s.first));
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}
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}
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return ~static_cast<difference_type>(0);
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}
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difference_type position(const char_type* sub) const
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{
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const char_type* sub_end = sub;
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while(*sub_end) ++sub_end;
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return position(named_subexpression_index(sub, sub_end));
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}
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template <class charT>
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difference_type position(const charT* sub) const
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{
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const charT* sub_end = sub;
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while(*sub_end) ++sub_end;
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return position(named_subexpression_index(sub, sub_end));
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}
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template <class charT, class Traits, class A>
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difference_type position(const std::basic_string<charT, Traits, A>& sub) const
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{
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return position(sub.c_str());
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}
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string_type str(int sub = 0) const
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{
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if(m_is_singular)
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raise_logic_error();
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sub += 2;
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string_type result;
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if(sub < (int)m_subs.size() && (sub > 0))
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{
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const sub_match<BidiIterator>& s = m_subs[sub];
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if(s.matched)
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{
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result = s.str();
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}
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}
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return result;
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}
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string_type str(const char_type* sub) const
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{
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return (*this)[sub].str();
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}
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template <class Traits, class A>
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string_type str(const std::basic_string<char_type, Traits, A>& sub) const
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{
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return (*this)[sub].str();
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}
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template <class charT>
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string_type str(const charT* sub) const
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{
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return (*this)[sub].str();
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}
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template <class charT, class Traits, class A>
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string_type str(const std::basic_string<charT, Traits, A>& sub) const
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{
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return (*this)[sub].str();
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}
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const_reference operator[](int sub) const
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{
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if(m_is_singular && m_subs.empty())
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raise_logic_error();
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sub += 2;
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if(sub < (int)m_subs.size() && (sub >= 0))
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{
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return m_subs[sub];
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}
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return m_null;
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}
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//
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// Named sub-expressions:
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//
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const_reference named_subexpression(const char_type* i, const char_type* j) const
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{
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//
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// Scan for the leftmost *matched* subexpression with the specified named:
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//
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if(m_is_singular)
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raise_logic_error();
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BOOST_REGEX_DETAIL_NS::named_subexpressions::range_type r = m_named_subs->equal_range(i, j);
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while((r.first != r.second) && ((*this)[r.first->index].matched == false))
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++r.first;
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return r.first != r.second ? (*this)[r.first->index] : m_null;
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}
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template <class charT>
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const_reference named_subexpression(const charT* i, const charT* j) const
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{
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static_assert(sizeof(charT) <= sizeof(char_type), "Failed internal logic");
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if(i == j)
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return m_null;
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std::vector<char_type> s;
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while(i != j)
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s.insert(s.end(), *i++);
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return named_subexpression(&*s.begin(), &*s.begin() + s.size());
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}
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int named_subexpression_index(const char_type* i, const char_type* j) const
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{
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//
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// Scan for the leftmost *matched* subexpression with the specified named.
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// If none found then return the leftmost expression with that name,
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// otherwise an invalid index:
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//
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if(m_is_singular)
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raise_logic_error();
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BOOST_REGEX_DETAIL_NS::named_subexpressions::range_type s, r;
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s = r = m_named_subs->equal_range(i, j);
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while((r.first != r.second) && ((*this)[r.first->index].matched == false))
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++r.first;
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if(r.first == r.second)
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r = s;
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return r.first != r.second ? r.first->index : -20;
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}
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template <class charT>
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int named_subexpression_index(const charT* i, const charT* j) const
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{
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static_assert(sizeof(charT) <= sizeof(char_type), "Failed internal logic");
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if(i == j)
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return -20;
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std::vector<char_type> s;
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while(i != j)
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s.insert(s.end(), *i++);
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return named_subexpression_index(&*s.begin(), &*s.begin() + s.size());
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}
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template <class Traits, class A>
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const_reference operator[](const std::basic_string<char_type, Traits, A>& s) const
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{
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return named_subexpression(s.c_str(), s.c_str() + s.size());
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}
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const_reference operator[](const char_type* p) const
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{
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const char_type* e = p;
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while(*e) ++e;
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return named_subexpression(p, e);
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}
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template <class charT>
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const_reference operator[](const charT* p) const
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{
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static_assert(sizeof(charT) <= sizeof(char_type), "Failed internal logic");
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if(*p == 0)
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return m_null;
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std::vector<char_type> s;
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while(*p)
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s.insert(s.end(), *p++);
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return named_subexpression(&*s.begin(), &*s.begin() + s.size());
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}
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template <class charT, class Traits, class A>
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const_reference operator[](const std::basic_string<charT, Traits, A>& ns) const
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{
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static_assert(sizeof(charT) <= sizeof(char_type), "Failed internal logic");
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if(ns.empty())
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return m_null;
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std::vector<char_type> s;
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for(unsigned i = 0; i < ns.size(); ++i)
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s.insert(s.end(), ns[i]);
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return named_subexpression(&*s.begin(), &*s.begin() + s.size());
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}
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const_reference prefix() const
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{
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if(m_is_singular)
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raise_logic_error();
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return (*this)[-1];
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}
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const_reference suffix() const
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{
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if(m_is_singular)
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raise_logic_error();
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return (*this)[-2];
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}
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const_iterator begin() const
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{
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return (m_subs.size() > 2) ? (m_subs.begin() + 2) : m_subs.end();
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}
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const_iterator end() const
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{
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return m_subs.end();
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}
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// format:
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template <class OutputIterator, class Functor>
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OutputIterator format(OutputIterator out,
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Functor fmt,
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match_flag_type flags = format_default) const
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{
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if(m_is_singular)
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raise_logic_error();
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typedef typename BOOST_REGEX_DETAIL_NS::compute_functor_type<Functor, match_results<BidiIterator, Allocator>, OutputIterator>::type F;
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F func(fmt);
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return func(*this, out, flags);
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}
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template <class Functor>
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string_type format(Functor fmt, match_flag_type flags = format_default) const
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{
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if(m_is_singular)
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raise_logic_error();
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std::basic_string<char_type> result;
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BOOST_REGEX_DETAIL_NS::string_out_iterator<std::basic_string<char_type> > i(result);
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typedef typename BOOST_REGEX_DETAIL_NS::compute_functor_type<Functor, match_results<BidiIterator, Allocator>, BOOST_REGEX_DETAIL_NS::string_out_iterator<std::basic_string<char_type> > >::type F;
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F func(fmt);
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func(*this, i, flags);
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return result;
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}
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// format with locale:
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template <class OutputIterator, class Functor, class RegexT>
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OutputIterator format(OutputIterator out,
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Functor fmt,
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match_flag_type flags,
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const RegexT& re) const
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{
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if(m_is_singular)
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raise_logic_error();
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typedef ::boost::regex_traits_wrapper<typename RegexT::traits_type> traits_type;
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typedef typename BOOST_REGEX_DETAIL_NS::compute_functor_type<Functor, match_results<BidiIterator, Allocator>, OutputIterator, traits_type>::type F;
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F func(fmt);
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return func(*this, out, flags, re.get_traits());
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}
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template <class RegexT, class Functor>
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string_type format(Functor fmt,
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match_flag_type flags,
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const RegexT& re) const
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{
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if(m_is_singular)
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raise_logic_error();
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typedef ::boost::regex_traits_wrapper<typename RegexT::traits_type> traits_type;
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std::basic_string<char_type> result;
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BOOST_REGEX_DETAIL_NS::string_out_iterator<std::basic_string<char_type> > i(result);
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typedef typename BOOST_REGEX_DETAIL_NS::compute_functor_type<Functor, match_results<BidiIterator, Allocator>, BOOST_REGEX_DETAIL_NS::string_out_iterator<std::basic_string<char_type> >, traits_type >::type F;
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F func(fmt);
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func(*this, i, flags, re.get_traits());
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return result;
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}
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const_reference get_last_closed_paren()const
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{
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if(m_is_singular)
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raise_logic_error();
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return m_last_closed_paren == 0 ? m_null : (*this)[m_last_closed_paren];
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}
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allocator_type get_allocator() const
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{
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return m_subs.get_allocator();
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}
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void swap(match_results& that)
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{
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std::swap(m_subs, that.m_subs);
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std::swap(m_named_subs, that.m_named_subs);
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std::swap(m_last_closed_paren, that.m_last_closed_paren);
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if(m_is_singular)
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{
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if(!that.m_is_singular)
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{
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m_base = that.m_base;
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m_null = that.m_null;
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}
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}
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else if(that.m_is_singular)
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{
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that.m_base = m_base;
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that.m_null = m_null;
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}
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else
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{
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std::swap(m_base, that.m_base);
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std::swap(m_null, that.m_null);
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}
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std::swap(m_is_singular, that.m_is_singular);
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}
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bool operator==(const match_results& that)const
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{
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if(m_is_singular)
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{
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return that.m_is_singular;
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}
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else if(that.m_is_singular)
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{
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return false;
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}
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return (m_subs == that.m_subs) && (m_base == that.m_base) && (m_last_closed_paren == that.m_last_closed_paren);
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}
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bool operator!=(const match_results& that)const
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{ return !(*this == that); }
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#ifdef BOOST_REGEX_MATCH_EXTRA
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typedef typename sub_match<BidiIterator>::capture_sequence_type capture_sequence_type;
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const capture_sequence_type& captures(int i)const
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{
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if(m_is_singular)
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raise_logic_error();
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return (*this)[i].captures();
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}
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#endif
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//
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// private access functions:
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void set_second(BidiIterator i)
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{
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BOOST_REGEX_ASSERT(m_subs.size() > 2);
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m_subs[2].second = i;
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m_subs[2].matched = true;
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m_subs[0].first = i;
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m_subs[0].matched = (m_subs[0].first != m_subs[0].second);
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m_null.first = i;
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m_null.second = i;
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m_null.matched = false;
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m_is_singular = false;
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}
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void set_second(BidiIterator i, size_type pos, bool m = true, bool escape_k = false)
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{
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if(pos)
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m_last_closed_paren = static_cast<int>(pos);
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pos += 2;
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BOOST_REGEX_ASSERT(m_subs.size() > pos);
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m_subs[pos].second = i;
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m_subs[pos].matched = m;
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if((pos == 2) && !escape_k)
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{
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m_subs[0].first = i;
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m_subs[0].matched = (m_subs[0].first != m_subs[0].second);
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m_null.first = i;
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m_null.second = i;
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m_null.matched = false;
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m_is_singular = false;
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}
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}
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void set_size(size_type n, BidiIterator i, BidiIterator j)
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{
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value_type v(j);
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size_type len = m_subs.size();
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if(len > n + 2)
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{
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m_subs.erase(m_subs.begin()+n+2, m_subs.end());
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std::fill(m_subs.begin(), m_subs.end(), v);
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}
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else
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{
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std::fill(m_subs.begin(), m_subs.end(), v);
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if(n+2 != len)
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m_subs.insert(m_subs.end(), n+2-len, v);
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}
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m_subs[1].first = i;
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m_last_closed_paren = 0;
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|
}
|
|
void set_base(BidiIterator pos)
|
|
{
|
|
m_base = pos;
|
|
}
|
|
BidiIterator base()const
|
|
{
|
|
return m_base;
|
|
}
|
|
void set_first(BidiIterator i)
|
|
{
|
|
BOOST_REGEX_ASSERT(m_subs.size() > 2);
|
|
// set up prefix:
|
|
m_subs[1].second = i;
|
|
m_subs[1].matched = (m_subs[1].first != i);
|
|
// set up $0:
|
|
m_subs[2].first = i;
|
|
// zero out everything else:
|
|
for(size_type n = 3; n < m_subs.size(); ++n)
|
|
{
|
|
m_subs[n].first = m_subs[n].second = m_subs[0].second;
|
|
m_subs[n].matched = false;
|
|
}
|
|
}
|
|
void set_first(BidiIterator i, size_type pos, bool escape_k = false)
|
|
{
|
|
BOOST_REGEX_ASSERT(pos+2 < m_subs.size());
|
|
if(pos || escape_k)
|
|
{
|
|
m_subs[pos+2].first = i;
|
|
if(escape_k)
|
|
{
|
|
m_subs[1].second = i;
|
|
m_subs[1].matched = (m_subs[1].first != m_subs[1].second);
|
|
}
|
|
}
|
|
else
|
|
set_first(i);
|
|
}
|
|
void maybe_assign(const match_results<BidiIterator, Allocator>& m);
|
|
|
|
void set_named_subs(std::shared_ptr<named_sub_type> subs)
|
|
{
|
|
m_named_subs = subs;
|
|
}
|
|
|
|
private:
|
|
//
|
|
// Error handler called when an uninitialized match_results is accessed:
|
|
//
|
|
static void raise_logic_error()
|
|
{
|
|
std::logic_error e("Attempt to access an uninitialized boost::match_results<> class.");
|
|
#ifndef BOOST_REGEX_STANDALONE
|
|
boost::throw_exception(e);
|
|
#else
|
|
throw e;
|
|
#endif
|
|
}
|
|
|
|
|
|
vector_type m_subs; // subexpressions
|
|
BidiIterator m_base; // where the search started from
|
|
sub_match<BidiIterator> m_null; // a null match
|
|
std::shared_ptr<named_sub_type> m_named_subs; // Shared copy of named subs in the regex object
|
|
int m_last_closed_paren; // Last ) to be seen - used for formatting
|
|
bool m_is_singular; // True if our stored iterators are singular
|
|
};
|
|
|
|
template <class BidiIterator, class Allocator>
|
|
void match_results<BidiIterator, Allocator>::maybe_assign(const match_results<BidiIterator, Allocator>& m)
|
|
{
|
|
if(m_is_singular)
|
|
{
|
|
*this = m;
|
|
return;
|
|
}
|
|
const_iterator p1, p2;
|
|
p1 = begin();
|
|
p2 = m.begin();
|
|
//
|
|
// Distances are measured from the start of *this* match, unless this isn't
|
|
// a valid match in which case we use the start of the whole sequence. Note that
|
|
// no subsequent match-candidate can ever be to the left of the first match found.
|
|
// This ensures that when we are using bidirectional iterators, that distances
|
|
// measured are as short as possible, and therefore as efficient as possible
|
|
// to compute. Finally note that we don't use the "matched" data member to test
|
|
// whether a sub-expression is a valid match, because partial matches set this
|
|
// to false for sub-expression 0.
|
|
//
|
|
BidiIterator l_end = this->suffix().second;
|
|
BidiIterator l_base = (p1->first == l_end) ? this->prefix().first : (*this)[0].first;
|
|
difference_type len1 = 0;
|
|
difference_type len2 = 0;
|
|
difference_type base1 = 0;
|
|
difference_type base2 = 0;
|
|
std::size_t i;
|
|
for(i = 0; i < size(); ++i, ++p1, ++p2)
|
|
{
|
|
//
|
|
// Leftmost takes priority over longest; handle special cases
|
|
// where distances need not be computed first (an optimisation
|
|
// for bidirectional iterators: ensure that we don't accidently
|
|
// compute the length of the whole sequence, as this can be really
|
|
// expensive).
|
|
//
|
|
if(p1->first == l_end)
|
|
{
|
|
if(p2->first != l_end)
|
|
{
|
|
// p2 must be better than p1, and no need to calculate
|
|
// actual distances:
|
|
base1 = 1;
|
|
base2 = 0;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
// *p1 and *p2 are either unmatched or match end-of sequence,
|
|
// either way no need to calculate distances:
|
|
if((p1->matched == false) && (p2->matched == true))
|
|
break;
|
|
if((p1->matched == true) && (p2->matched == false))
|
|
return;
|
|
continue;
|
|
}
|
|
}
|
|
else if(p2->first == l_end)
|
|
{
|
|
// p1 better than p2, and no need to calculate distances:
|
|
return;
|
|
}
|
|
base1 = std::distance(l_base, p1->first);
|
|
base2 = std::distance(l_base, p2->first);
|
|
BOOST_REGEX_ASSERT(base1 >= 0);
|
|
BOOST_REGEX_ASSERT(base2 >= 0);
|
|
if(base1 < base2) return;
|
|
if(base2 < base1) break;
|
|
|
|
len1 = std::distance((BidiIterator)p1->first, (BidiIterator)p1->second);
|
|
len2 = std::distance((BidiIterator)p2->first, (BidiIterator)p2->second);
|
|
BOOST_REGEX_ASSERT(len1 >= 0);
|
|
BOOST_REGEX_ASSERT(len2 >= 0);
|
|
if((len1 != len2) || ((p1->matched == false) && (p2->matched == true)))
|
|
break;
|
|
if((p1->matched == true) && (p2->matched == false))
|
|
return;
|
|
}
|
|
if(i == size())
|
|
return;
|
|
if(base2 < base1)
|
|
*this = m;
|
|
else if((len2 > len1) || ((p1->matched == false) && (p2->matched == true)) )
|
|
*this = m;
|
|
}
|
|
|
|
template <class BidiIterator, class Allocator>
|
|
void swap(match_results<BidiIterator, Allocator>& a, match_results<BidiIterator, Allocator>& b)
|
|
{
|
|
a.swap(b);
|
|
}
|
|
|
|
template <class charT, class traits, class BidiIterator, class Allocator>
|
|
std::basic_ostream<charT, traits>&
|
|
operator << (std::basic_ostream<charT, traits>& os,
|
|
const match_results<BidiIterator, Allocator>& s)
|
|
{
|
|
return (os << s.str());
|
|
}
|
|
|
|
#ifdef BOOST_REGEX_MSVC
|
|
#pragma warning(pop)
|
|
#endif
|
|
} // namespace boost
|
|
|
|
#endif
|
|
|
|
|