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647 lines
25 KiB
C++
647 lines
25 KiB
C++
// Boost string_algo library regex.hpp header file ---------------------------//
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// Copyright Pavol Droba 2002-2003.
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// See http://www.boost.org/ for updates, documentation, and revision history.
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#ifndef BOOST_STRING_REGEX_HPP
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#define BOOST_STRING_REGEX_HPP
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#include <boost/algorithm/string/config.hpp>
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#include <boost/regex.hpp>
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#include <boost/range/iterator_range_core.hpp>
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#include <boost/range/begin.hpp>
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#include <boost/range/end.hpp>
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#include <boost/range/iterator.hpp>
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#include <boost/range/as_literal.hpp>
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#include <boost/algorithm/string/find_format.hpp>
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#include <boost/algorithm/string/regex_find_format.hpp>
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#include <boost/algorithm/string/formatter.hpp>
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#include <boost/algorithm/string/iter_find.hpp>
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/*! \file
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Defines regex variants of the algorithms.
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*/
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namespace boost {
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namespace algorithm {
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// find_regex -----------------------------------------------//
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//! Find regex algorithm
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/*!
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Search for a substring matching the given regex in the input.
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\param Input A container which will be searched.
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\param Rx A regular expression
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\param Flags Regex options
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\return
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An \c iterator_range delimiting the match.
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Returned iterator is either \c RangeT::iterator or
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\c RangeT::const_iterator, depending on the constness of
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the input parameter.
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\note This function provides the strong exception-safety guarantee
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*/
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template<
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typename RangeT,
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typename CharT,
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typename RegexTraitsT>
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inline iterator_range<
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BOOST_STRING_TYPENAME range_iterator<RangeT>::type >
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find_regex(
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RangeT& Input,
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const basic_regex<CharT, RegexTraitsT>& Rx,
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match_flag_type Flags=match_default )
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{
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iterator_range<BOOST_STRING_TYPENAME range_iterator<RangeT>::type> lit_input(::boost::as_literal(Input));
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return ::boost::algorithm::regex_finder(Rx,Flags)(
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::boost::begin(lit_input), ::boost::end(lit_input) );
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}
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// replace_regex --------------------------------------------------------------------//
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//! Replace regex algorithm
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/*!
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Search for a substring matching given regex and format it with
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the specified format.
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The result is a modified copy of the input. It is returned as a sequence
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or copied to the output iterator.
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\param Output An output iterator to which the result will be copied
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\param Input An input string
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\param Rx A regular expression
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\param Format Regex format definition
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\param Flags Regex options
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\return An output iterator pointing just after the last inserted character or
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a modified copy of the input
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\note The second variant of this function provides the strong exception-safety guarantee
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*/
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template<
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typename OutputIteratorT,
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typename RangeT,
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typename CharT,
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typename RegexTraitsT,
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typename FormatStringTraitsT, typename FormatStringAllocatorT >
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inline OutputIteratorT replace_regex_copy(
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OutputIteratorT Output,
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const RangeT& Input,
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const basic_regex<CharT, RegexTraitsT>& Rx,
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const std::basic_string<CharT, FormatStringTraitsT, FormatStringAllocatorT>& Format,
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match_flag_type Flags=match_default | format_default )
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{
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return ::boost::algorithm::find_format_copy(
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Output,
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Input,
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::boost::algorithm::regex_finder( Rx, Flags ),
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::boost::algorithm::regex_formatter( Format, Flags ) );
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}
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//! Replace regex algorithm
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/*!
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\overload
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*/
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template<
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typename SequenceT,
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typename CharT,
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typename RegexTraitsT,
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typename FormatStringTraitsT, typename FormatStringAllocatorT >
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inline SequenceT replace_regex_copy(
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const SequenceT& Input,
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const basic_regex<CharT, RegexTraitsT>& Rx,
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const std::basic_string<CharT, FormatStringTraitsT, FormatStringAllocatorT>& Format,
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match_flag_type Flags=match_default | format_default )
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{
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return ::boost::algorithm::find_format_copy(
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Input,
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::boost::algorithm::regex_finder( Rx, Flags ),
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::boost::algorithm::regex_formatter( Format, Flags ) );
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}
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//! Replace regex algorithm
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/*!
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Search for a substring matching given regex and format it with
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the specified format. The input string is modified in-place.
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\param Input An input string
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\param Rx A regular expression
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\param Format Regex format definition
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\param Flags Regex options
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*/
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template<
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typename SequenceT,
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typename CharT,
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typename RegexTraitsT,
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typename FormatStringTraitsT, typename FormatStringAllocatorT >
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inline void replace_regex(
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SequenceT& Input,
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const basic_regex<CharT, RegexTraitsT>& Rx,
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const std::basic_string<CharT, FormatStringTraitsT, FormatStringAllocatorT>& Format,
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match_flag_type Flags=match_default | format_default )
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{
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::boost::algorithm::find_format(
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Input,
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::boost::algorithm::regex_finder( Rx, Flags ),
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::boost::algorithm::regex_formatter( Format, Flags ) );
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}
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// replace_all_regex --------------------------------------------------------------------//
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//! Replace all regex algorithm
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/*!
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Format all substrings, matching given regex, with the specified format.
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The result is a modified copy of the input. It is returned as a sequence
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or copied to the output iterator.
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\param Output An output iterator to which the result will be copied
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\param Input An input string
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\param Rx A regular expression
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\param Format Regex format definition
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\param Flags Regex options
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\return An output iterator pointing just after the last inserted character or
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a modified copy of the input
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\note The second variant of this function provides the strong exception-safety guarantee
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*/
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template<
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typename OutputIteratorT,
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typename RangeT,
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typename CharT,
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typename RegexTraitsT,
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typename FormatStringTraitsT, typename FormatStringAllocatorT >
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inline OutputIteratorT replace_all_regex_copy(
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OutputIteratorT Output,
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const RangeT& Input,
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const basic_regex<CharT, RegexTraitsT>& Rx,
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const std::basic_string<CharT, FormatStringTraitsT, FormatStringAllocatorT>& Format,
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match_flag_type Flags=match_default | format_default )
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{
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return ::boost::algorithm::find_format_all_copy(
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Output,
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Input,
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::boost::algorithm::regex_finder( Rx, Flags ),
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::boost::algorithm::regex_formatter( Format, Flags ) );
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}
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//! Replace all regex algorithm
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/*!
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\overload
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*/
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template<
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typename SequenceT,
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typename CharT,
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typename RegexTraitsT,
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typename FormatStringTraitsT, typename FormatStringAllocatorT >
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inline SequenceT replace_all_regex_copy(
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const SequenceT& Input,
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const basic_regex<CharT, RegexTraitsT>& Rx,
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const std::basic_string<CharT, FormatStringTraitsT, FormatStringAllocatorT>& Format,
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match_flag_type Flags=match_default | format_default )
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{
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return ::boost::algorithm::find_format_all_copy(
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Input,
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::boost::algorithm::regex_finder( Rx, Flags ),
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::boost::algorithm::regex_formatter( Format, Flags ) );
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}
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//! Replace all regex algorithm
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/*!
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Format all substrings, matching given regex, with the specified format.
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The input string is modified in-place.
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\param Input An input string
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\param Rx A regular expression
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\param Format Regex format definition
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\param Flags Regex options
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*/
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template<
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typename SequenceT,
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typename CharT,
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typename RegexTraitsT,
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typename FormatStringTraitsT, typename FormatStringAllocatorT >
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inline void replace_all_regex(
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SequenceT& Input,
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const basic_regex<CharT, RegexTraitsT>& Rx,
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const std::basic_string<CharT, FormatStringTraitsT, FormatStringAllocatorT>& Format,
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match_flag_type Flags=match_default | format_default )
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{
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::boost::algorithm::find_format_all(
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Input,
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::boost::algorithm::regex_finder( Rx, Flags ),
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::boost::algorithm::regex_formatter( Format, Flags ) );
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}
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// erase_regex --------------------------------------------------------------------//
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//! Erase regex algorithm
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/*!
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Remove a substring matching given regex from the input.
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The result is a modified copy of the input. It is returned as a sequence
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or copied to the output iterator.
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\param Output An output iterator to which the result will be copied
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\param Input An input string
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\param Rx A regular expression
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\param Flags Regex options
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\return An output iterator pointing just after the last inserted character or
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a modified copy of the input
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\note The second variant of this function provides the strong exception-safety guarantee
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*/
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template<
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typename OutputIteratorT,
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typename RangeT,
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typename CharT,
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typename RegexTraitsT >
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inline OutputIteratorT erase_regex_copy(
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OutputIteratorT Output,
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const RangeT& Input,
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const basic_regex<CharT, RegexTraitsT>& Rx,
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match_flag_type Flags=match_default )
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{
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return ::boost::algorithm::find_format_copy(
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Output,
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Input,
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::boost::algorithm::regex_finder( Rx, Flags ),
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::boost::algorithm::empty_formatter( Input ) );
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}
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//! Erase regex algorithm
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/*!
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\overload
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*/
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template<
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typename SequenceT,
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typename CharT,
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typename RegexTraitsT >
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inline SequenceT erase_regex_copy(
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const SequenceT& Input,
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const basic_regex<CharT, RegexTraitsT>& Rx,
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match_flag_type Flags=match_default )
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{
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return ::boost::algorithm::find_format_copy(
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Input,
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::boost::algorithm::regex_finder( Rx, Flags ),
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::boost::algorithm::empty_formatter( Input ) );
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}
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//! Erase regex algorithm
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/*!
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Remove a substring matching given regex from the input.
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The input string is modified in-place.
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\param Input An input string
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\param Rx A regular expression
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\param Flags Regex options
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*/
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template<
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typename SequenceT,
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typename CharT,
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typename RegexTraitsT >
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inline void erase_regex(
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SequenceT& Input,
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const basic_regex<CharT, RegexTraitsT>& Rx,
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match_flag_type Flags=match_default )
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{
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::boost::algorithm::find_format(
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Input,
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::boost::algorithm::regex_finder( Rx, Flags ),
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::boost::algorithm::empty_formatter( Input ) );
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}
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// erase_all_regex --------------------------------------------------------------------//
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//! Erase all regex algorithm
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/*!
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Erase all substrings, matching given regex, from the input.
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The result is a modified copy of the input. It is returned as a sequence
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or copied to the output iterator.
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\param Output An output iterator to which the result will be copied
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\param Input An input string
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\param Rx A regular expression
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\param Flags Regex options
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\return An output iterator pointing just after the last inserted character or
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a modified copy of the input
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\note The second variant of this function provides the strong exception-safety guarantee
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*/
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template<
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typename OutputIteratorT,
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typename RangeT,
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typename CharT,
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typename RegexTraitsT >
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inline OutputIteratorT erase_all_regex_copy(
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OutputIteratorT Output,
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const RangeT& Input,
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const basic_regex<CharT, RegexTraitsT>& Rx,
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match_flag_type Flags=match_default )
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{
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return ::boost::algorithm::find_format_all_copy(
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Output,
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Input,
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::boost::algorithm::regex_finder( Rx, Flags ),
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::boost::algorithm::empty_formatter( Input ) );
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}
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//! Erase all regex algorithm
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/*!
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\overload
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*/
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template<
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typename SequenceT,
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typename CharT,
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typename RegexTraitsT >
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inline SequenceT erase_all_regex_copy(
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const SequenceT& Input,
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const basic_regex<CharT, RegexTraitsT>& Rx,
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match_flag_type Flags=match_default )
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{
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return ::boost::algorithm::find_format_all_copy(
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Input,
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::boost::algorithm::regex_finder( Rx, Flags ),
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::boost::algorithm::empty_formatter( Input ) );
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}
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//! Erase all regex algorithm
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/*!
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Erase all substrings, matching given regex, from the input.
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The input string is modified in-place.
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\param Input An input string
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\param Rx A regular expression
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\param Flags Regex options
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*/
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template<
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typename SequenceT,
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typename CharT,
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typename RegexTraitsT>
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inline void erase_all_regex(
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SequenceT& Input,
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const basic_regex<CharT, RegexTraitsT>& Rx,
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match_flag_type Flags=match_default )
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{
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::boost::algorithm::find_format_all(
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Input,
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::boost::algorithm::regex_finder( Rx, Flags ),
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::boost::algorithm::empty_formatter( Input ) );
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}
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// find_all_regex ------------------------------------------------------------------//
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//! Find all regex algorithm
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/*!
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This algorithm finds all substrings matching the give regex
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in the input.
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Each part is copied and added as a new element to the output container.
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Thus the result container must be able to hold copies
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of the matches (in a compatible structure like std::string) or
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a reference to it (e.g. using the iterator range class).
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Examples of such a container are \c std::vector<std::string>
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or \c std::list<boost::iterator_range<std::string::iterator>>
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\param Result A container that can hold copies of references to the substrings.
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\param Input A container which will be searched.
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\param Rx A regular expression
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\param Flags Regex options
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\return A reference to the result
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\note Prior content of the result will be overwritten.
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\note This function provides the strong exception-safety guarantee
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*/
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template<
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typename SequenceSequenceT,
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typename RangeT,
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typename CharT,
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typename RegexTraitsT >
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inline SequenceSequenceT& find_all_regex(
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SequenceSequenceT& Result,
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const RangeT& Input,
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const basic_regex<CharT, RegexTraitsT>& Rx,
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match_flag_type Flags=match_default )
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{
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return ::boost::algorithm::iter_find(
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Result,
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Input,
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::boost::algorithm::regex_finder(Rx,Flags) );
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}
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// split_regex ------------------------------------------------------------------//
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//! Split regex algorithm
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/*!
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Tokenize expression. This function is equivalent to C strtok. Input
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sequence is split into tokens, separated by separators. Separator
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is an every match of the given regex.
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Each part is copied and added as a new element to the output container.
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Thus the result container must be able to hold copies
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of the matches (in a compatible structure like std::string) or
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a reference to it (e.g. using the iterator range class).
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Examples of such a container are \c std::vector<std::string>
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or \c std::list<boost::iterator_range<std::string::iterator>>
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\param Result A container that can hold copies of references to the substrings.
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\param Input A container which will be searched.
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\param Rx A regular expression
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\param Flags Regex options
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\return A reference to the result
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\note Prior content of the result will be overwritten.
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\note This function provides the strong exception-safety guarantee
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*/
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template<
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typename SequenceSequenceT,
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typename RangeT,
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typename CharT,
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typename RegexTraitsT >
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inline SequenceSequenceT& split_regex(
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SequenceSequenceT& Result,
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const RangeT& Input,
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const basic_regex<CharT, RegexTraitsT>& Rx,
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match_flag_type Flags=match_default )
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{
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return ::boost::algorithm::iter_split(
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Result,
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Input,
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::boost::algorithm::regex_finder(Rx,Flags) );
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}
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// join_if ------------------------------------------------------------------//
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#ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
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//! Conditional join algorithm
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/*!
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This algorithm joins all strings in a 'list' into one long string.
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Segments are concatenated by given separator. Only segments that
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match the given regular expression will be added to the result
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This is a specialization of join_if algorithm.
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\param Input A container that holds the input strings. It must be a container-of-containers.
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\param Separator A string that will separate the joined segments.
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\param Rx A regular expression
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\param Flags Regex options
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\return Concatenated string.
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\note This function provides the strong exception-safety guarantee
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*/
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template<
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typename SequenceSequenceT,
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typename Range1T,
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typename CharT,
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typename RegexTraitsT >
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inline typename range_value<SequenceSequenceT>::type
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join_if(
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const SequenceSequenceT& Input,
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const Range1T& Separator,
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const basic_regex<CharT, RegexTraitsT>& Rx,
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match_flag_type Flags=match_default )
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{
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// Define working types
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typedef typename range_value<SequenceSequenceT>::type ResultT;
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typedef typename range_const_iterator<SequenceSequenceT>::type InputIteratorT;
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// Parse input
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InputIteratorT itBegin=::boost::begin(Input);
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InputIteratorT itEnd=::boost::end(Input);
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// Construct container to hold the result
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ResultT Result;
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// Roll to the first element that will be added
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while(
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itBegin!=itEnd &&
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!::boost::regex_match(::boost::begin(*itBegin), ::boost::end(*itBegin), Rx, Flags)) ++itBegin;
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// Add this element
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if(itBegin!=itEnd)
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{
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detail::insert(Result, ::boost::end(Result), *itBegin);
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++itBegin;
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}
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for(;itBegin!=itEnd; ++itBegin)
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{
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if(::boost::regex_match(::boost::begin(*itBegin), ::boost::end(*itBegin), Rx, Flags))
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{
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// Add separator
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detail::insert(Result, ::boost::end(Result), ::boost::as_literal(Separator));
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// Add element
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detail::insert(Result, ::boost::end(Result), *itBegin);
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}
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}
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|
return Result;
|
|
}
|
|
|
|
#else // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
|
|
|
|
//! Conditional join algorithm
|
|
/*!
|
|
This algorithm joins all strings in a 'list' into one long string.
|
|
Segments are concatenated by given separator. Only segments that
|
|
match the given regular expression will be added to the result
|
|
|
|
This is a specialization of join_if algorithm.
|
|
|
|
\param Input A container that holds the input strings. It must be a container-of-containers.
|
|
\param Separator A string that will separate the joined segments.
|
|
\param Rx A regular expression
|
|
\param Flags Regex options
|
|
\return Concatenated string.
|
|
|
|
\note This function provides the strong exception-safety guarantee
|
|
*/
|
|
template<
|
|
typename SequenceSequenceT,
|
|
typename Range1T,
|
|
typename CharT,
|
|
typename RegexTraitsT >
|
|
inline typename range_value<SequenceSequenceT>::type
|
|
join_if_regex(
|
|
const SequenceSequenceT& Input,
|
|
const Range1T& Separator,
|
|
const basic_regex<CharT, RegexTraitsT>& Rx,
|
|
match_flag_type Flags=match_default )
|
|
{
|
|
// Define working types
|
|
typedef typename range_value<SequenceSequenceT>::type ResultT;
|
|
typedef typename range_const_iterator<SequenceSequenceT>::type InputIteratorT;
|
|
|
|
// Parse input
|
|
InputIteratorT itBegin=::boost::begin(Input);
|
|
InputIteratorT itEnd=::boost::end(Input);
|
|
|
|
// Construct container to hold the result
|
|
ResultT Result;
|
|
|
|
|
|
// Roll to the first element that will be added
|
|
while(
|
|
itBegin!=itEnd &&
|
|
!::boost::regex_match(::boost::begin(*itBegin), ::boost::end(*itBegin), Rx, Flags)) ++itBegin;
|
|
|
|
// Add this element
|
|
if(itBegin!=itEnd)
|
|
{
|
|
detail::insert(Result, ::boost::end(Result), *itBegin);
|
|
++itBegin;
|
|
}
|
|
|
|
for(;itBegin!=itEnd; ++itBegin)
|
|
{
|
|
if(::boost::regex_match(::boost::begin(*itBegin), ::boost::end(*itBegin), Rx, Flags))
|
|
{
|
|
// Add separator
|
|
detail::insert(Result, ::boost::end(Result), ::boost::as_literal(Separator));
|
|
// Add element
|
|
detail::insert(Result, ::boost::end(Result), *itBegin);
|
|
}
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
|
|
#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
|
|
|
|
} // namespace algorithm
|
|
|
|
// pull names into the boost namespace
|
|
using algorithm::find_regex;
|
|
using algorithm::replace_regex;
|
|
using algorithm::replace_regex_copy;
|
|
using algorithm::replace_all_regex;
|
|
using algorithm::replace_all_regex_copy;
|
|
using algorithm::erase_regex;
|
|
using algorithm::erase_regex_copy;
|
|
using algorithm::erase_all_regex;
|
|
using algorithm::erase_all_regex_copy;
|
|
using algorithm::find_all_regex;
|
|
using algorithm::split_regex;
|
|
|
|
#ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
|
|
using algorithm::join_if;
|
|
#else // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
|
|
using algorithm::join_if_regex;
|
|
#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
|
|
|
|
} // namespace boost
|
|
|
|
|
|
#endif // BOOST_STRING_REGEX_HPP
|