view tests/case.lac @ 170:a158f8c5aa55

Parsing basic patterns
author Adam Chlipala <adamc@hcoop.net>
date Tue, 29 Jul 2008 16:38:15 -0400
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children c7a6e6dbc318
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datatype t = A | B

val swap = fn x : t => case x of A => B | B => A

datatype u = C of t | D

val out = fn x : u => case x of C y => y | D => A

datatype nat = O | S of nat

val is_two = fn x : int_list =>
        case x of S (S O) => A | _ => B