A pattern like (.)? causes the following error: racket@> (regexp-replace* #px"(.)?" "a" (lambda args "foo")) car: expects argument of type <pair>; given #f
=== context === /usr/local/plt-head/collects/racket/private/string.rkt:174:7: loop /usr/local/plt-head/collects/racket/private/string.rkt:314:11: core /usr/local/plt-head/collects/racket/private/misc.rkt:78:7 Replace the insert function with a string and it works: racket@> (regexp-replace* #px"(.)?" "a" "foo") "foofoo" Get rid of the ? and it works: racket@> (regexp-replace* #px"(.)" "a" (lambda args "foo")) "foo" I guess this has to do with constructing the args list to apply to the insert function. N. _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
