Remove unneeded 'rec' in Reduce

1 files changed, 17 insertions, 1 deletions

diff --git a/src/reduce.sml b/src/reduce.sml
index 89b9b30e..9cc57cb2 100644
--- a/src/reduce.sml
+++ b/src/reduce.sml
@@ -148,7 +148,23 @@ fun exp env e =
 
 and reduceExp env = U.Exp.mapB {kind = kind, con = con, exp = exp, bind = bind} env
 
-fun decl env d = d
+fun decl env d =
+    case d of
+        DValRec [vi as (_, n, _, e, _)] =>
+        let
+            fun kind _ = false
+            fun con _ = false
+            fun exp e =
+                case e of
+                    ENamed n' => n' = n
+                  | _ => false
+        in
+            if U.Exp.exists {kind = kind, con = con, exp = exp} e then
+                d
+            else
+                DVal vi
+        end
+      | _ => d
 
 val reduce = U.File.mapB {kind = kind, con = con, exp = exp, decl = decl, bind = bind} E.empty