std::basic_regex constants

Since C++17

Header: <regex>

std::basic_regex defines several constants that govern general regex matching syntax.

# Declarations

static constexpr std::regex_constants::syntax_option_type icase =
std::regex_constants::icase;
static constexpr std::regex_constants::syntax_option_type nosubs =
std::regex_constants::nosubs;
static constexpr std::regex_constants::syntax_option_type optimize =
std::regex_constants::optimize;
static constexpr std::regex_constants::syntax_option_type collate =
std::regex_constants::collate;
static constexpr std::regex_constants::syntax_option_type ECMAScript =
std::regex_constants::ECMAScript;
static constexpr std::regex_constants::syntax_option_type basic =
std::regex_constants::basic;
static constexpr std::regex_constants::syntax_option_type extended =
std::regex_constants::extended;
static constexpr std::regex_constants::syntax_option_type awk =
std::regex_constants::awk;
static constexpr std::regex_constants::syntax_option_type grep =
std::regex_constants::grep;
static constexpr std::regex_constants::syntax_option_type egrep =
std::regex_constants::egrep;

static constexpr std::regex_constants::syntax_option_type multiline =
std::regex_constants::multiline;

(since C++17)

# See also