- string-match REGEXP STRINGprocedure
- string-match-positions REGEXP STRINGprocedure
Matches the regular expression in REGEXP (a string or a precompiled regular expression) with STRING and returns either #f if the match failed, or a list of matching groups, where the first element is the complete match. For each matching group the result-list contains either: #f for a non-matching but optional group; a list of start- and end-position of the match in STRING (in the case of string-match-positions); or the matching substring (in the case of string-match). Note that the exact string is matched. For searching a pattern inside a string, see below. Note also that string-match is implemented by calling string-search with the regular expression wrapped in ^ ... $.