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view record.urs @ 23:9d6b931fbd13
Implement JSON type class for recursive datatypes, using Mu combinator.
| author | Edward Z. Yang <ezyang@mit.edu> |
|---|---|
| date | Wed, 02 May 2012 11:47:37 -0400 |
| parents | a6730c3cfea7 |
| children | f55f66c6fdee |
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val numFields : r ::: {Type} -> folder r -> $r -> int val mem : a ::: Type -> ns ::: {Unit} -> eq a -> folder ns -> a -> $(mapU a ns) -> bool (* Is a value found in a record? *) val equal : ts ::: {Type} -> $(map eq ts) -> folder ts -> $ts -> $ts -> bool (* Are two records equal? *)