std::regex_constants::match_flag_type
| Defined in header <regex>
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| typedef /*unspecified*/ match_flag_type; static constexpr match_flag_type match_default = 0 |
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Specifies additional regular expression matching options. It is a bitmask type, the following constants are defined:
Note: [first, last) refers to the character sequence being matched.
| Constant | Explanation |
| 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 |
