chickadee » lexgen » tok

tok TOKEN PROCprocedure

Procedure tok builds pattern matchers based on character comparison operations. It is intended for matching input sequences that are SRFI-127 lazy streams.

For each stream given, tok applies a procedure to the given token TOKEN and an input character. If the procedure returns a true value, that value is prepended to the list of consumed elements, and the input character is removed from the stream of input elements.