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view demo/list.urs @ 1860:d54984564bcd

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Make that error message even more helpful
author Adam Chlipala <adam@chlipala.net>
date Wed, 17 Jul 2013 10:48:31 -0400
parents 4d519baf357c
children
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datatype list t = Nil | Cons of t * list t

val length : t ::: Type -> list t -> int

val rev : t ::: Type -> list t -> list t