Mercurial > urweb
diff tests/type_classMod.lac @ 217:56db662ebcfd
Fun with type classes and modules
author | Adam Chlipala <adamc@hcoop.net> |
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date | Sat, 16 Aug 2008 16:30:07 -0400 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/tests/type_classMod.lac Sat Aug 16 16:30:07 2008 -0400 @@ -0,0 +1,18 @@ +structure M = struct + structure N = struct + class c t = t + val string_c : c string = "Hi" + end +end + +val c : t :: Type -> M.N.c t -> t = + fn t :: Type => fn pf : M.N.c t => pf +val hi = c [string] _ + +val bool_c : M.N.c bool = True +val true = c [bool] _ +val hi = c [string] _ + +con c = M.N.c +val int_c : c int = 0 +val zero = c [int] _