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author | Adam Chlipala <adamc@hcoop.net> | 2008-08-03 19:49:21 -0400 |
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committer | Adam Chlipala <adamc@hcoop.net> | 2008-08-03 19:49:21 -0400 |
commit | 744cdbb9e3907db9bb01576750634c614147e1a3 (patch) | |
tree | aecef31d4055d34a31977834cbda020811d1dfab /src/cjr_env.sml | |
parent | 9a9f1738a8eae9df07f97da224cd9cf45033e9dc (diff) |
Datatype representation optimization
Diffstat (limited to 'src/cjr_env.sml')
-rw-r--r-- | src/cjr_env.sml | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/src/cjr_env.sml b/src/cjr_env.sml index 6a3c41bc..83f0cc30 100644 --- a/src/cjr_env.sml +++ b/src/cjr_env.sml @@ -129,14 +129,21 @@ fun lookupStruct (env : env) n = NONE => raise UnboundStruct n | SOME x => x +fun classifyDatatype xncs = + if List.all (fn (_, _, NONE) => true | _ => false) xncs then + Enum + else + Default + fun declBinds env (d, loc) = case d of - DDatatype (x, n, xncs) => + DDatatype (_, x, n, xncs) => let val env = pushDatatype env x n xncs + val dt = (TDatatype (classifyDatatype xncs, n, xncs), loc) in - foldl (fn ((x', n', NONE), env) => pushENamed env x' n' (TDatatype (n, xncs), loc) - | ((x', n', SOME t), env) => pushENamed env x' n' (TFun (t, (TDatatype (n, xncs), loc)), loc)) + foldl (fn ((x', n', NONE), env) => pushENamed env x' n' dt + | ((x', n', SOME t), env) => pushENamed env x' n' (TFun (t, dt), loc)) env xncs end | DStruct (n, xts) => pushStruct env n xts |