regex_constants.h File Reference

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Namespaces

• namespace std
• namespace std::regex_constants

5.1 Regular Expression Syntax Options

• enum std::regex_constants::__syntax_option {
    _S_icase, _S_nosubs, _S_optimize, _S_collate,
    _S_ECMAScript, _S_basic, _S_extended, _S_awk,
    _S_grep, _S_egrep, _S_syntax_last
  }
• typedef unsigned int std::regex_constants::syntax_option_type
• static constexpr syntax_option_type std::regex_constants::icase
• static constexpr syntax_option_type std::regex_constants::nosubs
• static constexpr syntax_option_type std::regex_constants::optimize
• static constexpr syntax_option_type std::regex_constants::collate
• static constexpr syntax_option_type std::regex_constants::ECMAScript
• static constexpr syntax_option_type std::regex_constants::basic
• static constexpr syntax_option_type std::regex_constants::extended
• static constexpr syntax_option_type std::regex_constants::awk
• static constexpr syntax_option_type std::regex_constants::grep
• static constexpr syntax_option_type std::regex_constants::egrep

5.2 Matching Rules

Matching a regular expression against a sequence of characters [first, last) proceeds according to the rules of the grammar specified for the regular expression object, modified according to the effects listed below for any bitmask elements set.

• enum std::regex_constants::__match_flag {
    _S_not_bol, _S_not_eol, _S_not_bow, _S_not_eow,
    _S_any, _S_not_null, _S_continuous, _S_prev_avail,
    _S_sed, _S_no_copy, _S_first_only, _S_match_flag_last
  }
• typedef std::bitset
  < _S_match_flag_last > std::regex_constants::match_flag_type
• static constexpr match_flag_type std::regex_constants::match_default
• static constexpr match_flag_type std::regex_constants::match_not_bol
• static constexpr match_flag_type std::regex_constants::match_not_eol
• static constexpr match_flag_type std::regex_constants::match_not_bow
• static constexpr match_flag_type std::regex_constants::match_not_eow
• static constexpr match_flag_type std::regex_constants::match_any
• static constexpr match_flag_type std::regex_constants::match_not_null
• static constexpr match_flag_type std::regex_constants::match_continuous
• static constexpr match_flag_type std::regex_constants::match_prev_avail
• static constexpr match_flag_type std::regex_constants::format_default
• static constexpr match_flag_type std::regex_constants::format_sed
• static constexpr match_flag_type std::regex_constants::format_no_copy
• static constexpr match_flag_type std::regex_constants::format_first_only

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Detailed Description

Constant definitions for the std regex library.

This is an internal header file, included by other library headers. Do not attempt to use it directly. Instead, include <regex>.

Definition in file regex_constants.h.