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view tests/type_class.lac @ 212:ba4d7c33a45f
Testing type-class-parameterized functions
author | Adam Chlipala <adamc@hcoop.net> |
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date | Sat, 16 Aug 2008 14:36:17 -0400 |
parents | e86411f647c6 |
children |
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class default t = t val string_default : default string = "Hi" val int_default : default int = 0 val default : t :: Type -> default t -> t = fn t :: Type => fn d : default t => d val hi = default [string] _ val zero = default [int] _ val frob : t :: Type -> default t -> t = fn t :: Type => fn _ : default t => default [t] _ val hi_again = frob [string] _ val zero_again = frob [int] _ val main : unit -> page = fn () => <html><body> {cdata hi_again} </body></html>