view lib/ur/option.urs @ 843:9f0ea203a1ca

List.all; fix ANDALSO/ORELSE parsing precedence
author Adam Chlipala <adamc@hcoop.net>
date Sun, 07 Jun 2009 14:15:22 -0400
parents 44c2c089ca15
children 74a1e3bdf430
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datatype t = datatype Basis.option

val isSome : a ::: Type -> t a -> bool