<option> ( regexp -- regexp? )
Regular expression combinators

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<one-or-more> ( regexp -- regexp+ )

Vocabulary
regexp.combinators

Inputs

regexp

a regexp

Outputs

regexp?

a regexp

Word description
Creates a new regular expression which matches zero or one copies of the given regexp.

Definition

USING: regexp.ast regexp.combinators.private sequences ;

IN: regexp.combinators

: <option> ( regexp -- regexp? )
    [ "(" ")?" surround ] [ <maybe> ] modify-regexp ; foldable
    flushable