author | Simon Howkins <simonh@symbian.org> |
Thu, 28 Oct 2010 12:05:33 +0100 | |
branch | RCL_3 |
changeset 78 | 5b3c983434ca |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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/////////////////////////////////////////////////////////////////////////////// |
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/// \file regex_compiler.hpp |
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/// Contains the definition of regex_compiler, a factory for building regex objects |
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/// from strings. |
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// |
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// Copyright 2004 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_REGEX_COMPILER_HPP_EAN_10_04_2005 |
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#define BOOST_XPRESSIVE_REGEX_COMPILER_HPP_EAN_10_04_2005 |
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// MS compatible compilers support #pragma once |
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#if defined(_MSC_VER) && (_MSC_VER >= 1020) |
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# pragma once |
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#endif |
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#include <boost/xpressive/basic_regex.hpp> |
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#include <boost/xpressive/detail/dynamic/parser.hpp> |
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#include <boost/xpressive/detail/dynamic/parse_charset.hpp> |
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#include <boost/xpressive/detail/dynamic/parser_enum.hpp> |
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#include <boost/xpressive/detail/dynamic/parser_traits.hpp> |
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#include <boost/xpressive/detail/core/linker.hpp> |
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#include <boost/xpressive/detail/core/optimize.hpp> |
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namespace boost { namespace xpressive |
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{ |
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/////////////////////////////////////////////////////////////////////////////// |
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// regex_compiler |
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// |
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/// \brief Class template regex_compiler is a factory for building basic_regex objects from a string. |
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/// |
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/// Class template regex_compiler is used to construct a basic_regex object from a string. The string |
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/// should contain a valid regular expression. You can imbue a regex_compiler object with a locale, |
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/// after which all basic_regex objects created with that regex_compiler object will use that locale. |
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/// After creating a regex_compiler object, and optionally imbueing it with a locale, you can call the |
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/// compile() method to construct a basic_regex object, passing it the string representing the regular |
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/// expression. You can call compile() multiple times on the same regex_compiler object. Two basic_regex |
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/// objects compiled from the same string will have different regex_id's. |
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template<typename BidiIter, typename RegexTraits, typename CompilerTraits> |
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struct regex_compiler |
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{ |
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typedef BidiIter iterator_type; |
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typedef typename iterator_value<BidiIter>::type char_type; |
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typedef std::basic_string<char_type> string_type; |
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typedef regex_constants::syntax_option_type flag_type; |
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typedef RegexTraits traits_type; |
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typedef typename traits_type::char_class_type char_class_type; |
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typedef typename traits_type::locale_type locale_type; |
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explicit regex_compiler(RegexTraits const &traits = RegexTraits()) |
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: mark_count_(0) |
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, hidden_mark_count_(0) |
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, traits_(traits) |
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, upper_(0) |
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{ |
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this->upper_ = lookup_classname(this->rxtraits(), "upper"); |
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BOOST_ASSERT(0 != this->upper_); |
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} |
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/////////////////////////////////////////////////////////////////////////// |
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// imbue |
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/// Specify the locale to be used by a regex_compiler. |
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/// |
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/// \param loc The locale that this regex_compiler should use. |
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/// \return The previous locale. |
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locale_type imbue(locale_type loc) |
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{ |
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locale_type oldloc = this->traits_.imbue(loc); |
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this->upper_ = lookup_classname(this->rxtraits(), "upper"); |
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BOOST_ASSERT(0 != this->upper_); |
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return oldloc; |
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} |
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/////////////////////////////////////////////////////////////////////////// |
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// getloc |
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/// Get the locale used by a regex_compiler. |
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/// |
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/// \param loc The locale that this regex_compiler uses. |
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locale_type getloc() const |
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{ |
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return this->traits_.getloc(); |
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} |
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/////////////////////////////////////////////////////////////////////////// |
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// compile |
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/// Builds a basic_regex object from a std::string. |
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/// |
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/// \param pat A std::string containing the regular expression pattern. |
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/// \param flags Optional bitmask that determines how the pat string is interpreted. (See syntax_option_type.) |
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/// \return A basic_regex object corresponding to the regular expression represented by the string. |
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/// \pre The std::string pat contains a valid string-based representation of a regular expression. |
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/// \throw regex_error when the string has invalid regular expression syntax. |
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basic_regex<BidiIter> compile(string_type pat, flag_type flags = regex_constants::ECMAScript) |
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{ |
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this->reset(); |
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this->traits_.flags(flags); |
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string_iterator begin = pat.begin(), end = pat.end(); |
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102 |
// at the top level, a regex is a sequence of alternates |
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103 |
alternates_list alternates; |
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104 |
this->parse_alternates(begin, end, alternates); |
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detail::ensure(begin == end, regex_constants::error_paren, "mismatched parenthesis"); |
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106 |
|
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107 |
// convert the alternates list to the appropriate matcher and terminate the sequence |
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108 |
detail::sequence<BidiIter> seq = detail::alternates_to_matchable(alternates, alternates_factory()); |
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seq += detail::make_dynamic_xpression<BidiIter>(detail::end_matcher()); |
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110 |
|
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// fill in the back-pointers by visiting the regex parse tree |
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detail::xpression_linker<char_type> linker(this->rxtraits()); |
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113 |
seq.first->link(linker); |
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114 |
|
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115 |
// bundle the regex information into a regex_impl object |
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detail::regex_impl<BidiIter> impl; |
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impl.xpr_ = seq.first; |
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impl.traits_.reset(new RegexTraits(this->rxtraits())); |
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impl.mark_count_ = this->mark_count_; |
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impl.hidden_mark_count_ = this->hidden_mark_count_; |
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121 |
|
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122 |
// optimization: get the peek chars OR the boyer-moore search string |
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detail::optimize_regex(impl, this->rxtraits(), detail::is_random<BidiIter>()); |
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124 |
|
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return detail::core_access<BidiIter>::make_regex(impl); |
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126 |
} |
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127 |
|
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128 |
private: |
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129 |
|
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typedef typename string_type::const_iterator string_iterator; |
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typedef std::list<detail::sequence<BidiIter> > alternates_list; |
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typedef detail::escape_value<char_type, char_class_type> escape_value; |
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typedef detail::alternates_factory_impl<BidiIter, traits_type> alternates_factory; |
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134 |
|
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135 |
/////////////////////////////////////////////////////////////////////////// |
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136 |
// reset |
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137 |
/// INTERNAL ONLY |
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138 |
void reset() |
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139 |
{ |
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this->mark_count_ = 0; |
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this->hidden_mark_count_ = 0; |
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this->traits_.flags(regex_constants::ECMAScript); |
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143 |
} |
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144 |
|
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145 |
/////////////////////////////////////////////////////////////////////////// |
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146 |
// regex_traits |
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/// INTERNAL ONLY |
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148 |
traits_type &rxtraits() |
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149 |
{ |
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return this->traits_.traits(); |
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151 |
} |
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152 |
|
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153 |
/////////////////////////////////////////////////////////////////////////// |
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154 |
// regex_traits |
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155 |
/// INTERNAL ONLY |
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traits_type const &rxtraits() const |
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157 |
{ |
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158 |
return this->traits_.traits(); |
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159 |
} |
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160 |
|
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161 |
/////////////////////////////////////////////////////////////////////////// |
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162 |
// parse_alternates |
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163 |
/// INTERNAL ONLY |
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164 |
void parse_alternates(string_iterator &begin, string_iterator end, alternates_list &alternates) |
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165 |
{ |
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166 |
using namespace regex_constants; |
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167 |
string_iterator old_begin; |
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168 |
|
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169 |
do |
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170 |
{ |
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171 |
alternates.push_back(this->parse_sequence(begin, end)); |
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old_begin = begin; |
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173 |
} |
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174 |
while(begin != end && token_alternate == this->traits_.get_token(begin, end)); |
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175 |
|
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begin = old_begin; |
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177 |
} |
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178 |
|
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179 |
/////////////////////////////////////////////////////////////////////////// |
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180 |
// parse_group |
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181 |
/// INTERNAL ONLY |
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182 |
detail::sequence<BidiIter> parse_group(string_iterator &begin, string_iterator end) |
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183 |
{ |
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184 |
using namespace regex_constants; |
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int mark_nbr = 0; |
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bool keeper = false; |
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bool lookahead = false; |
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bool lookbehind = false; |
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bool negative = false; |
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std::size_t old_mark_count = this->mark_count_; |
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191 |
|
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detail::sequence<BidiIter> seq, seq_end; |
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string_iterator tmp = string_iterator(); |
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194 |
|
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syntax_option_type old_flags = this->traits_.flags(); |
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196 |
|
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switch(this->traits_.get_group_type(begin, end)) |
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198 |
{ |
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199 |
case token_no_mark: |
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// Don't process empty groups like (?:) or (?i) |
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201 |
// BUGBUG this doesn't handle the degenerate (?:)+ correctly |
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if(token_group_end == this->traits_.get_token(tmp = begin, end)) |
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203 |
{ |
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return this->parse_atom(begin = tmp, end); |
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205 |
} |
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206 |
break; |
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|
207 |
|
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|
208 |
case token_negative_lookahead: |
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|
209 |
negative = true; // fall-through |
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diff
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|
210 |
case token_positive_lookahead: |
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|
211 |
lookahead = true; |
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|
212 |
seq_end = detail::make_dynamic_xpression<BidiIter>(detail::true_matcher()); |
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diff
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|
213 |
break; |
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diff
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|
214 |
|
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diff
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|
215 |
case token_negative_lookbehind: |
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diff
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|
216 |
negative = true; // fall-through |
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diff
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|
217 |
case token_positive_lookbehind: |
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|
218 |
lookbehind = true; |
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|
219 |
seq_end = detail::make_dynamic_xpression<BidiIter>(detail::true_matcher()); |
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|
220 |
break; |
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diff
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|
221 |
|
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|
222 |
case token_independent_sub_expression: |
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|
223 |
keeper = true; |
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|
224 |
seq_end = detail::make_dynamic_xpression<BidiIter>(detail::true_matcher()); |
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|
225 |
break; |
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diff
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|
226 |
|
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|
227 |
case token_comment: |
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228 |
while(detail::ensure(begin != end, error_paren, "mismatched parenthesis")) |
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|
229 |
{ |
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230 |
switch(this->traits_.get_token(begin, end)) |
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|
231 |
{ |
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|
232 |
case token_group_end: return this->parse_atom(begin, end); |
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|
233 |
case token_escape: detail::ensure(begin != end, error_escape, "incomplete escape sequence"); |
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|
234 |
case token_literal: ++begin; |
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235 |
default:; |
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|
236 |
} |
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|
237 |
} |
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|
238 |
break; |
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parents:
diff
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|
239 |
|
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|
240 |
default: |
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|
241 |
mark_nbr = static_cast<int>(++this->mark_count_); |
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Revision: 201002
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|
242 |
seq = detail::make_dynamic_xpression<BidiIter>(detail::mark_begin_matcher(mark_nbr)); |
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diff
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|
243 |
seq_end = detail::make_dynamic_xpression<BidiIter>(detail::mark_end_matcher(mark_nbr)); |
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|
244 |
break; |
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diff
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|
245 |
} |
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|
246 |
|
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Revision: 201002
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|
247 |
// alternates |
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|
248 |
alternates_list alternates; |
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Revision: 201002
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|
249 |
this->parse_alternates(begin, end, alternates); |
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|
250 |
detail::ensure |
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|
251 |
( |
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Revision: 201002
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|
252 |
begin != end && token_group_end == this->traits_.get_token(begin, end) |
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|
253 |
, error_paren |
e4d67989cc36
Revision: 201002
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|
254 |
, "mismatched parenthesis" |
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|
255 |
); |
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|
256 |
|
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Revision: 201002
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diff
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|
257 |
seq += detail::alternates_to_matchable(alternates, alternates_factory()); |
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|
258 |
seq += seq_end; |
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Revision: 201002
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|
259 |
|
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Revision: 201002
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|
260 |
typedef shared_ptr<detail::matchable<BidiIter> const> xpr_type; |
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|
261 |
bool do_save = (this->mark_count_ != old_mark_count); |
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|
262 |
|
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Revision: 201002
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parents:
diff
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|
263 |
if(lookahead) |
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Revision: 201002
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parents:
diff
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|
264 |
{ |
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Revision: 201002
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parents:
diff
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|
265 |
detail::lookahead_matcher<xpr_type> lookahead(seq.first, negative, do_save); |
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Revision: 201002
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parents:
diff
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|
266 |
seq = detail::make_dynamic_xpression<BidiIter>(lookahead); |
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Revision: 201002
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parents:
diff
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|
267 |
} |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
268 |
else if(lookbehind) |
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parents:
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|
269 |
{ |
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Revision: 201002
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parents:
diff
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|
270 |
detail::lookbehind_matcher<xpr_type> lookbehind(seq.first, negative, do_save); |
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Revision: 201002
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parents:
diff
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|
271 |
seq = detail::make_dynamic_xpression<BidiIter>(lookbehind); |
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Revision: 201002
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parents:
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|
272 |
} |
e4d67989cc36
Revision: 201002
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parents:
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|
273 |
else if(keeper) // independent sub-expression |
e4d67989cc36
Revision: 201002
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parents:
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|
274 |
{ |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
275 |
detail::keeper_matcher<xpr_type> keeper(seq.first, do_save); |
e4d67989cc36
Revision: 201002
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parents:
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|
276 |
seq = detail::make_dynamic_xpression<BidiIter>(keeper); |
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Revision: 201002
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parents:
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|
277 |
} |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
278 |
|
e4d67989cc36
Revision: 201002
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|
279 |
// restore the modifiers |
e4d67989cc36
Revision: 201002
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parents:
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|
280 |
this->traits_.flags(old_flags); |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
281 |
return seq; |
e4d67989cc36
Revision: 201002
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diff
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|
282 |
} |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
283 |
|
e4d67989cc36
Revision: 201002
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parents:
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|
284 |
/////////////////////////////////////////////////////////////////////////// |
e4d67989cc36
Revision: 201002
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diff
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|
285 |
// parse_charset |
e4d67989cc36
Revision: 201002
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parents:
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|
286 |
/// INTERNAL ONLY |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
287 |
detail::sequence<BidiIter> parse_charset(string_iterator &begin, string_iterator end) |
e4d67989cc36
Revision: 201002
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|
288 |
{ |
e4d67989cc36
Revision: 201002
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parents:
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|
289 |
detail::compound_charset<traits_type> chset; |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
290 |
|
e4d67989cc36
Revision: 201002
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parents:
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|
291 |
// call out to a helper to actually parse the character set |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
292 |
detail::parse_charset(begin, end, chset, this->traits_); |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
293 |
|
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
294 |
return detail::make_charset_xpression<BidiIter> |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
295 |
( |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
296 |
chset |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
297 |
, this->rxtraits() |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
298 |
, this->traits_.flags() |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
299 |
); |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
300 |
} |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
301 |
|
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
302 |
/////////////////////////////////////////////////////////////////////////// |
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
303 |
// parse_atom |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
304 |
/// INTERNAL ONLY |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
305 |
detail::sequence<BidiIter> parse_atom(string_iterator &begin, string_iterator end) |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
306 |
{ |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
307 |
using namespace regex_constants; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
308 |
escape_value esc = { 0, 0, 0, detail::escape_char }; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
309 |
string_iterator old_begin = begin; |
e4d67989cc36
Revision: 201002
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parents:
diff
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|
310 |
|
e4d67989cc36
Revision: 201002
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parents:
diff
changeset
|
311 |
switch(this->traits_.get_token(begin, end)) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
312 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
313 |
case token_literal: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
314 |
return detail::make_literal_xpression<BidiIter> |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
315 |
( |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
316 |
this->parse_literal(begin, end), this->traits_.flags(), this->rxtraits() |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
317 |
); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
318 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
319 |
case token_any: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
320 |
return detail::make_any_xpression<BidiIter>(this->traits_.flags(), this->rxtraits()); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
321 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
322 |
case token_assert_begin_sequence: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
323 |
return detail::make_dynamic_xpression<BidiIter>(detail::assert_bos_matcher()); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
324 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
325 |
case token_assert_end_sequence: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
326 |
return detail::make_dynamic_xpression<BidiIter>(detail::assert_eos_matcher()); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
327 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
328 |
case token_assert_begin_line: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
329 |
return detail::make_assert_begin_line<BidiIter>(this->traits_.flags(), this->rxtraits()); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
330 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
331 |
case token_assert_end_line: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
332 |
return detail::make_assert_end_line<BidiIter>(this->traits_.flags(), this->rxtraits()); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
333 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
334 |
case token_assert_word_boundary: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
335 |
return detail::make_assert_word<BidiIter>(detail::word_boundary<true>(), this->rxtraits()); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
336 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
337 |
case token_assert_not_word_boundary: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
338 |
return detail::make_assert_word<BidiIter>(detail::word_boundary<false>(), this->rxtraits()); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
339 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
340 |
case token_assert_word_begin: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
341 |
return detail::make_assert_word<BidiIter>(detail::word_begin(), this->rxtraits()); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
342 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
343 |
case token_assert_word_end: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
344 |
return detail::make_assert_word<BidiIter>(detail::word_end(), this->rxtraits()); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
345 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
346 |
case token_escape: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
347 |
esc = this->parse_escape(begin, end); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
348 |
switch(esc.type_) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
349 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
350 |
case detail::escape_mark: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
351 |
return detail::make_backref_xpression<BidiIter> |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
352 |
( |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
353 |
esc.mark_nbr_, this->traits_.flags(), this->rxtraits() |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
354 |
); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
355 |
case detail::escape_char: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
356 |
return detail::make_char_xpression<BidiIter> |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
357 |
( |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
358 |
esc.ch_, this->traits_.flags(), this->rxtraits() |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
359 |
); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
360 |
case detail::escape_class: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
361 |
return detail::make_posix_charset_xpression<BidiIter> |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
362 |
( |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
363 |
esc.class_ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
364 |
, this->rxtraits().isctype(*begin++, this->upper_) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
365 |
, this->traits_.flags() |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
366 |
, this->rxtraits() |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
367 |
); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
368 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
369 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
370 |
case token_group_begin: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
371 |
return this->parse_group(begin, end); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
372 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
373 |
case token_charset_begin: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
374 |
return this->parse_charset(begin, end); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
375 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
376 |
case token_invalid_quantifier: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
377 |
throw regex_error(error_badrepeat, "quantifier not expected"); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
378 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
379 |
case token_quote_meta_begin: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
380 |
return detail::make_literal_xpression<BidiIter> |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
381 |
( |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
382 |
this->parse_quote_meta(begin, end), this->traits_.flags(), this->rxtraits() |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
383 |
); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
384 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
385 |
case token_quote_meta_end: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
386 |
throw regex_error |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
387 |
( |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
388 |
error_escape |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
389 |
, "found quote-meta end without corresponding quote-meta begin" |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
390 |
); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
391 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
392 |
case token_end_of_pattern: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
393 |
break; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
394 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
395 |
default: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
396 |
begin = old_begin; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
397 |
break; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
398 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
399 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
400 |
return detail::sequence<BidiIter>(); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
401 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
402 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
403 |
/////////////////////////////////////////////////////////////////////////// |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
404 |
// parse_quant |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
405 |
/// INTERNAL ONLY |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
406 |
detail::sequence<BidiIter> parse_quant(string_iterator &begin, string_iterator end) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
407 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
408 |
BOOST_ASSERT(begin != end); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
409 |
detail::quant_spec spec = { 0, 0, false }; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
410 |
detail::sequence<BidiIter> seq = this->parse_atom(begin, end); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
411 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
412 |
// BUGBUG this doesn't handle the degenerate (?:)+ correctly |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
413 |
if(!seq.is_empty() && begin != end && seq.first->is_quantifiable()) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
414 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
415 |
if(this->traits_.get_quant_spec(begin, end, spec)) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
416 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
417 |
BOOST_ASSERT(spec.min_ <= spec.max_); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
418 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
419 |
if(0 == spec.max_) // quant {0,0} is degenerate -- matches nothing. |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
420 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
421 |
seq = this->parse_quant(begin, end); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
422 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
423 |
else |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
424 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
425 |
seq = seq.first->quantify(spec, this->hidden_mark_count_, seq, alternates_factory()); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
426 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
427 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
428 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
429 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
430 |
return seq; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
431 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
432 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
433 |
/////////////////////////////////////////////////////////////////////////// |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
434 |
// parse_sequence |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
435 |
/// INTERNAL ONLY |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
436 |
detail::sequence<BidiIter> parse_sequence(string_iterator &begin, string_iterator end) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
437 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
438 |
detail::sequence<BidiIter> seq; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
439 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
440 |
while(begin != end) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
441 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
442 |
detail::sequence<BidiIter> seq_quant = this->parse_quant(begin, end); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
443 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
444 |
// did we find a quantified atom? |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
445 |
if(seq_quant.is_empty()) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
446 |
break; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
447 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
448 |
// chain it to the end of the xpression sequence |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
449 |
seq += seq_quant; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
450 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
451 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
452 |
return seq; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
453 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
454 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
455 |
/////////////////////////////////////////////////////////////////////////// |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
456 |
// parse_literal |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
457 |
// scan ahead looking for char literals to be globbed together into a string literal |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
458 |
/// INTERNAL ONLY |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
459 |
string_type parse_literal(string_iterator &begin, string_iterator end) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
460 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
461 |
using namespace regex_constants; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
462 |
BOOST_ASSERT(begin != end); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
463 |
BOOST_ASSERT(token_literal == this->traits_.get_token(begin, end)); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
464 |
escape_value esc = { 0, 0, 0, detail::escape_char }; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
465 |
string_type literal(1, *begin); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
466 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
467 |
for(string_iterator prev = begin, tmp = ++begin; begin != end; prev = begin, begin = tmp) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
468 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
469 |
detail::quant_spec spec; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
470 |
if(this->traits_.get_quant_spec(tmp, end, spec)) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
471 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
472 |
if(literal.size() != 1) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
473 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
474 |
begin = prev; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
475 |
literal.erase(literal.size() - 1); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
476 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
477 |
return literal; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
478 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
479 |
else switch(this->traits_.get_token(tmp, end)) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
480 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
481 |
case token_escape: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
482 |
esc = this->parse_escape(tmp, end); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
483 |
if(detail::escape_char != esc.type_) return literal; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
484 |
literal += esc.ch_; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
485 |
break; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
486 |
case token_literal: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
487 |
literal += *tmp++; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
488 |
break; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
489 |
default: |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
490 |
return literal; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
491 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
492 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
493 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
494 |
return literal; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
495 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
496 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
497 |
/////////////////////////////////////////////////////////////////////////// |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
498 |
// parse_quote_meta |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
499 |
// scan ahead looking for char literals to be globbed together into a string literal |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
500 |
/// INTERNAL ONLY |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
501 |
string_type parse_quote_meta(string_iterator &begin, string_iterator end) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
502 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
503 |
using namespace regex_constants; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
504 |
string_iterator old_begin = begin, old_end; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
505 |
while(end != (old_end = begin)) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
506 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
507 |
switch(this->traits_.get_token(begin, end)) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
508 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
509 |
case token_quote_meta_end: return string_type(old_begin, old_end); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
510 |
case token_escape: detail::ensure(begin != end, error_escape, "incomplete escape sequence"); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
511 |
case token_literal: ++begin; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
512 |
default:; |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
513 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
514 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
515 |
return string_type(old_begin, begin); |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
516 |
} |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
517 |
|
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
518 |
/////////////////////////////////////////////////////////////////////////////// |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
519 |
// parse_escape |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
520 |
/// INTERNAL ONLY |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
521 |
escape_value parse_escape(string_iterator &begin, string_iterator end) |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
522 |
{ |
e4d67989cc36
Revision: 201002
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
523 |
detail::ensure(begin != end, regex_constants::error_escape, "incomplete escape sequence"); |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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524 |
|
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Revision: 201002
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// first, check to see if this can be a backreference |
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if(0 < this->rxtraits().value(*begin, 10)) |
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527 |
{ |
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// Parse at most 3 decimal digits. |
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string_iterator tmp = begin; |
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int mark_nbr = detail::toi(tmp, end, this->rxtraits(), 10, 999); |
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531 |
|
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// If the resulting number could conceivably be a backref, then it is. |
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if(10 > mark_nbr || mark_nbr <= static_cast<int>(this->mark_count_)) |
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534 |
{ |
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Revision: 201002
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begin = tmp; |
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escape_value esc = {0, mark_nbr, 0, detail::escape_mark}; |
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return esc; |
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} |
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539 |
} |
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540 |
|
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// Not a backreference, defer to the parse_escape helper |
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return detail::parse_escape(begin, end, this->traits_); |
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Revision: 201002
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543 |
} |
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|
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std::size_t mark_count_; |
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std::size_t hidden_mark_count_; |
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CompilerTraits traits_; |
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typename RegexTraits::char_class_type upper_; |
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549 |
}; |
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|
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}} // namespace boost::xpressive |
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|
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#endif |