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

constexpr syntax_option_type	std::regex_constants::icase

constexpr syntax_option_type	std::regex_constants::nosubs

constexpr syntax_option_type	std::regex_constants::optimize

constexpr syntax_option_type	std::regex_constants::collate

constexpr syntax_option_type	std::regex_constants::ECMAScript

constexpr syntax_option_type	std::regex_constants::basic

constexpr syntax_option_type	std::regex_constants::extended

constexpr syntax_option_type	std::regex_constants::awk

constexpr syntax_option_type	std::regex_constants::grep

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

constexpr match_flag_type	std::regex_constants::match_default

constexpr match_flag_type	std::regex_constants::match_not_bol

constexpr match_flag_type	std::regex_constants::match_not_eol

constexpr match_flag_type	std::regex_constants::match_not_bow

constexpr match_flag_type	std::regex_constants::match_not_eow

constexpr match_flag_type	std::regex_constants::match_any

constexpr match_flag_type	std::regex_constants::match_not_null

constexpr match_flag_type	std::regex_constants::match_continuous

constexpr match_flag_type	std::regex_constants::match_prev_avail

constexpr match_flag_type	std::regex_constants::format_default

constexpr match_flag_type	std::regex_constants::format_sed

constexpr match_flag_type	std::regex_constants::format_no_copy

constexpr match_flag_type	std::regex_constants::format_first_only

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.

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