- generator-for-each proc gen gen2 …procedure
A generator analogue of for-each that consumes generated values using side effects. Repeatedly applies proc on the values yielded by gen, gen2 ... until any one of the generators is exhausted. The values returned from proc are discarded. The procedure terminates when any of the genn generators is exhausted, at which time all the others are in an undefined state. Returns an unspecified value.