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diff lib/ur/top.urs @ 777:87a7702d681d

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outer demo
author Adam Chlipala <adamc@hcoop.net>
date Sun, 03 May 2009 14:57:33 -0400
parents acb8537f58f0
children d1d0b18afd3d
line wrap: on
line diff
--- a/lib/ur/top.urs	Sun May 03 12:49:47 2009 -0400
+++ b/lib/ur/top.urs	Sun May 03 14:57:33 2009 -0400
@@ -39,6 +39,9 @@
 val compose : t1 ::: Type -> t2 ::: Type -> t3 ::: Type
               -> (t2 -> t3) -> (t1 -> t2) -> (t1 -> t3)
 
+val show_option : t ::: Type -> show t -> show (option t)
+val read_option : t ::: Type -> read t -> read (option t)
+
 val txt : t ::: Type -> ctx ::: {Unit} -> use ::: {Type} -> show t -> t
           -> xml ctx use []