diff lib/ur/option.ur @ 845:6725d73c3c31

Mark current as effectful; add List functions
author Adam Chlipala <adamc@hcoop.net>
date Tue, 09 Jun 2009 11:12:34 -0400
parents 74a1e3bdf430
children 0d30e6338c65
line wrap: on
line diff