Mercurial > urweb
view tests/type_classMod2.ur @ 2203:39faa4a037f4
ML half of initial prototype. (Doesn't compile because there's no C yet.)
author | Ziv Scully <ziv@mit.edu> |
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date | Tue, 25 Mar 2014 02:04:06 -0400 |
parents | 71bafe66dbe1 |
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] _