The range used is [first,last), which includes all the characters between first and last, including the character pointed by first but not the character pointed by last. Match_flag_type is a type available under the std:: regex_constants namespace.įirst, last Bidirectional iterators to the initial and final positions in the range of characters used as target sequence for the match. ** Constants with a value of zero are ignored if some other flag is set. * These bitmask flag names are available under the std:: regex_constants namespace (see regex_constants for more details). ( match_not_bol and match_not_bow are ignored) One or more characters exist before the first one. Sub-sequences must begin at the first character to match.
The expression must match a sub-sequence that begins at the first character. The escape sequence "\b" does not match as an end-of-word.Īny match is acceptable if more than one match is possible.
The escape sequence "\b" does not match as a beginning-of-word. The last character is not considered an end of line ( "$" does not match). The first character is not considered a beginning of line ( "^" does not match). One or more of these constants can be combined (using the bitwise OR operator, |) to form a valid bitmask value of type regex_constants::match_flag_type: flags Flags used to control how rgx is matched. rgx A basic_regex object (the pattern) to match. Parameters s A string with the target sequence (the subject) against which the regex expression is matched. For a function that returns true when the match is only part of the sequence, see regex_search. The entire target sequence must match the regular expression for this function to return true (i.e., without any additional characters before or after the match).
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The versions 4, 5 and 6, are identical to 1, 2 and 3 respectively, except that they take an object of a match_results type as argument, which is filled with information about the match results.ĭeleting the signature with a moving string (7) prevents the construction with a temporary string object.Īn optional parameter, flags, allows to specify options on how to match the expression. The target sequence is either s or the character sequence between first and last, depending on the version used. Returns whether the target sequence matches the regular expression rgx. Template bool regex_match (const basic_string&, match_results::const_iterator,Alloc>&, const basic_regex&, regex_constants::match_flag_type=regex_constants::match_default) = delete Template bool regex_match (const charT* s, match_results& m, const basic_regex& rgx, regex_constants::match_flag_type flags = regex_constants::match_default) template bool regex_match (const basic_string& s, match_results::const_iterator,Alloc>& m, const basic_regex& rgx, regex_constants::match_flag_type flags = regex_constants::match_default) template bool regex_match (BidirectionalIterator first, BidirectionalIterator last, match_results& m, const basic_regex& rgx, regex_constants::match_flag_type flags = regex_constants::match_default) Template bool regex_match (BidirectionalIterator first, BidirectionalIterator last, const basic_regex& rgx, regex_constants::match_flag_type flags = regex_constants::match_default) Template bool regex_match (const basic_string& s, const basic_regex& rgx, regex_constants::match_flag_type flags = regex_constants::match_default) Template bool regex_match (const charT* s, const basic_regex& rgx, regex_constants::match_flag_type flags = regex_constants::match_default)
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