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| KASH3 Reference Manual
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| ### Function Regexp ( string R, string S ) -> elt-alg^boo, string, seq() ### Optional Arguments
Results | elt-ord^rat |  | 1 <= Results <= 3
### Description Given a regular expression R and a string S, test whether S matches R; if so, return true, the matched substring of S, and the sequence of matched substrings of S corresponding to the parenthesized expressions of R; otherwise, return false.
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