std::regex_constants::match_flag_type

typedef /*unspecified*/ match_flag_type;

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(since C++11)

constexpr match_flag_type match_default = 0; constexpr match_flag_type match_not_bol = /*unspecified*/; constexpr match_flag_type match_not_eol = /*unspecified*/; constexpr match_flag_type match_not_bow = /*unspecified*/; constexpr match_flag_type match_not_eow = /*unspecified*/; constexpr match_flag_type match_any = /*unspecified*/; constexpr match_flag_type match_not_null = /*unspecified*/; constexpr match_flag_type match_continuous = /*unspecified*/; constexpr match_flag_type match_prev_avail = /*unspecified*/; constexpr match_flag_type format_default = 0; constexpr match_flag_type format_sed = /*unspecified*/; constexpr match_flag_type format_no_copy = /*unspecified*/; constexpr match_flag_type format_first_only = /*unspecified*/;

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(since C++11) (until C++17)

inline constexpr match_flag_type match_default = 0; inline constexpr match_flag_type match_not_bol = /*unspecified*/; inline constexpr match_flag_type match_not_eol = /*unspecified*/; inline constexpr match_flag_type match_not_bow = /*unspecified*/; inline constexpr match_flag_type match_not_eow = /*unspecified*/; inline constexpr match_flag_type match_any = /*unspecified*/; inline constexpr match_flag_type match_not_null = /*unspecified*/; inline constexpr match_flag_type match_continuous = /*unspecified*/; inline constexpr match_flag_type match_prev_avail = /*unspecified*/; inline constexpr match_flag_type format_default = 0; inline constexpr match_flag_type format_sed = /*unspecified*/; inline constexpr match_flag_type format_no_copy = /*unspecified*/; inline constexpr match_flag_type format_first_only = /*unspecified*/;

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(since C++17)

match_not_bol

The first character in [first,last) will be treated as if it is not at the beginning of a line (i.e. ^ will not match [first,first)

match_not_eol

The last character in [first,last) will be treated as if it is not at the end of a line (i.e. $ will not match [last,last)

match_not_bow

"\b" will not match [first,first)

match_not_eow

"\b" will not match [last,last)

match_any

If more than one match is possible, then any match is an acceptable result

match_not_null

Do not match empty sequences

match_continuous

Only match a sub-sequence that begins at first

match_prev_avail

--first is a valid iterator position. When set, causes match_not_bol and match_not_bow to be ignored

format_default

Use ECMAScript rules to construct strings in std::regex_replace (syntax documentation)

format_sed

Use POSIX sed utility rules in std::regex_replace. (syntax documentation)

format_no_copy

Do not copy un-matched strings to the output in std::regex_replace

format_first_only

Only replace the first match in std::regex_replace

syntax_option_type (C++11)

general options controlling regex behavior (typedef)

error_type (C++11)

describes different types of matching errors (typedef)