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view tests/type_classMod2.lac @ 226:b0041cc7e5f7
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author | Adam Chlipala <adamc@hcoop.net> |
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date | Thu, 21 Aug 2008 13:59:49 -0400 |
parents | a3413288cce1 |
children |
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signature S = sig class c val default : t :: Type -> c t -> t val string_c : c string val int_c : c int end structure M : S = struct class c t = t val default = fn t :: Type => fn v : c t => v val int_c : c int = 0 val string_c : c string = "Hi" end val hi = M.default [string] _ val zero = M.default [int] _