Mercurial > urweb
diff src/reduce.sml @ 909:1d3f60e74ec7
Fixed bug in reduce bind-commutation
| author | Adam Chlipala <adamc@hcoop.net> |
|---|---|
| date | Sat, 22 Aug 2009 16:32:31 -0400 |
| parents | ed06e25c70ef |
| children | 8e540df3294d |
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--- a/src/reduce.sml Sat Aug 22 12:55:18 2009 -0400 +++ b/src/reduce.sml Sat Aug 22 16:32:31 2009 -0400 @@ -41,6 +41,18 @@ else multiLiftExpInExp (n - 1) (E.liftExpInExp 0 e) +val dangling = + CoreUtil.Exp.existsB {kind = fn _ => false, + con = fn _ => false, + exp = fn (n, e) => + case e of + ERel n' => n' >= n + | _ => false, + bind = fn (n, b) => + case b of + CoreUtil.Exp.RelE _ => n + 1 + | _ => n} + datatype env_item = UnknownK | KnownK of kind @@ -53,6 +65,15 @@ | Lift of int * int * int +val edepth = foldl (fn (UnknownE, n) => n + 1 + | (KnownE _, n) => n + 1 + | (_, n) => n) 0 + +val edepth' = foldl (fn (UnknownE, n) => n + 1 + | (KnownE _, n) => n + 1 + | (Lift (_, _, n'), n) => n + n' + | (_, n) => n) 0 + type env = env_item list fun ei2s ei = @@ -67,10 +88,18 @@ fun e2s env = String.concatWith " " (map ei2s env) -val deKnown = List.filter (fn KnownC _ => false +(*val deKnown = List.filter (fn KnownC _ => false | KnownE _ => false | KnownK _ => false - | _ => true) + | _ => true)*) + +val deKnown = ListUtil.mapConcat (fn KnownC _ => [] + | KnownE _ => [] + | KnownK _ => [] + | Lift (nk, nc, ne) => List.tabulate (nk, fn _ => UnknownK) + @ List.tabulate (nc, fn _ => UnknownC) + @ List.tabulate (ne, fn _ => UnknownE) + | x => [x]) fun kindConAndExp (namedC, namedE) = let @@ -222,310 +251,336 @@ this :: rest) fun exp env (all as (e, loc)) = - ((*Print.prefaces "exp" [("e", CorePrint.p_exp CoreEnv.empty all), - ("env", Print.PD.string (e2s env))];*) - case e of - EPrim _ => all - | ERel n => - let - fun find (n', env, nudge, liftK, liftC, liftE) = - case env of - [] => raise Fail "Reduce.exp: ERel" - | UnknownK :: rest => find (n', rest, nudge, liftK + 1, liftC, liftE) - | KnownK _ :: rest => find (n', rest, nudge, liftK, liftC, liftE) - | UnknownC :: rest => find (n', rest, nudge, liftK, liftC + 1, liftE) - | KnownC _ :: rest => find (n', rest, nudge, liftK, liftC, liftE) - | Lift (liftK', liftC', liftE') :: rest => - find (n', rest, nudge + liftE', - liftK + liftK', liftC + liftC', liftE + liftE') - | UnknownE :: rest => - if n' = 0 then - (ERel (n + nudge), loc) - else - find (n' - 1, rest, nudge, liftK, liftC, liftE + 1) - | KnownE e :: rest => - if n' = 0 then - ((*print "SUBSTITUTING\n";*) - exp (Lift (liftK, liftC, liftE) :: rest) e) - else - find (n' - 1, rest, nudge - 1, liftK, liftC, liftE) - in - (*print (Int.toString n ^ ": " ^ e2s env ^ "\n");*) - find (n, env, 0, 0, 0, 0) - end - | ENamed n => - (case IM.find (namedE, n) of - NONE => all - | SOME e => e) - | ECon (dk, pc, cs, eo) => (ECon (dk, patCon pc, - map (con env) cs, Option.map (exp env) eo), loc) - | EFfi _ => all - | EFfiApp (m, f, es) => (EFfiApp (m, f, map (exp env) es), loc) + let + (*val () = Print.prefaces "exp" [("e", CorePrint.p_exp CoreEnv.empty all), + ("env", Print.PD.string (e2s env))]*) + (*val () = if dangling (edepth env) all then + (Print.prefaces "exp" [("e", CorePrint.p_exp CoreEnv.empty all), + ("env", Print.PD.string (e2s env))]; + raise Fail "!") + else + ()*) - | EApp ( - (EApp - ((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), loc), _), _), t1), _), t2), _), - _), _), - (EApp ( - (EApp ( - (ECApp ( - (ECApp ((EFfi ("Basis", "return"), _), _), _), - _), _), - _), _), v), _)), _), trans2) => exp env (EApp (trans2, v), loc) + val r = case e of + EPrim _ => all + | ERel n => + let + fun find (n', env, nudge, liftK, liftC, liftE) = + case env of + [] => raise Fail ("Reduce.exp: ERel (" ^ ErrorMsg.spanToString loc ^ ")") + | UnknownK :: rest => find (n', rest, nudge, liftK + 1, liftC, liftE) + | KnownK _ :: rest => find (n', rest, nudge, liftK, liftC, liftE) + | UnknownC :: rest => find (n', rest, nudge, liftK, liftC + 1, liftE) + | KnownC _ :: rest => find (n', rest, nudge, liftK, liftC, liftE) + | Lift (liftK', liftC', liftE') :: rest => + find (n', rest, nudge + liftE', + liftK + liftK', liftC + liftC', liftE + liftE') + | UnknownE :: rest => + if n' = 0 then + (ERel (n + nudge), loc) + else + find (n' - 1, rest, nudge, liftK, liftC, liftE + 1) + | KnownE e :: rest => + if n' = 0 then + ((*print "SUBSTITUTING\n";*) + exp (Lift (liftK, liftC, liftE) :: rest) e) + else + find (n' - 1, rest, nudge - 1, liftK, liftC, liftE) + in + (*print (Int.toString n ^ ": " ^ e2s env ^ "\n");*) + find (n, env, 0, 0, 0, 0) + end + | ENamed n => + (case IM.find (namedE, n) of + NONE => all + | SOME e => e) + | ECon (dk, pc, cs, eo) => (ECon (dk, patCon pc, + map (con env) cs, Option.map (exp env) eo), loc) + | EFfi _ => all + | EFfiApp (m, f, es) => (EFfiApp (m, f, map (exp env) es), loc) - (*| EApp ( - (EApp - ((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), loc), _), _), t1), _), t2), _), - (EFfi ("Basis", "transaction_monad"), _)), _), - (ECase (ed, pes, {disc, ...}), _)), _), - trans2) => - let - val e' = (EFfi ("Basis", "bind"), loc) - val e' = (ECApp (e', (CFfi ("Basis", "transaction"), loc)), loc) - val e' = (ECApp (e', t1), loc) - val e' = (ECApp (e', t2), loc) - val e' = (EApp (e', (EFfi ("Basis", "transaction_monad"), loc)), loc) + | EApp ( + (EApp + ((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), loc), _), _), t1), _), t2), _), + _), _), + (EApp ( + (EApp ( + (ECApp ( + (ECApp ((EFfi ("Basis", "return"), _), _), _), + _), _), + _), _), v), _)), _), trans2) => exp env (EApp (trans2, v), loc) - val pes = map (fn (p, e) => - let - val e' = (EApp (e', e), loc) - val e' = (EApp (e', - multiLiftExpInExp (E.patBindsN p) - trans2), loc) - val e' = exp env e' - in - (p, e') - end) pes - in - (ECase (exp env ed, - pes, - {disc = con env disc, - result = (CApp ((CFfi ("Basis", "transaction"), loc), con env t2), loc)}), - loc) - end*) + (*| EApp ( + (EApp + ((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), loc), _), _), t1), _), t2), _), + (EFfi ("Basis", "transaction_monad"), _)), _), + (ECase (ed, pes, {disc, ...}), _)), _), + trans2) => + let + val e' = (EFfi ("Basis", "bind"), loc) + val e' = (ECApp (e', (CFfi ("Basis", "transaction"), loc)), loc) + val e' = (ECApp (e', t1), loc) + val e' = (ECApp (e', t2), loc) + val e' = (EApp (e', (EFfi ("Basis", "transaction_monad"), loc)), loc) - | EApp ( - (EApp - ((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), loc), _), _), t1), _), t2), _), - (EFfi ("Basis", "transaction_monad"), _)), _), - (EServerCall (n, es, ke, dom, ran), _)), _), - trans2) => - let - val e' = (EFfi ("Basis", "bind"), loc) - val e' = (ECApp (e', (CFfi ("Basis", "transaction"), loc)), loc) - val e' = (ECApp (e', dom), loc) - val e' = (ECApp (e', t2), loc) - val e' = (EApp (e', (EFfi ("Basis", "transaction_monad"), loc)), loc) - val e' = (EApp (e', (EApp (E.liftExpInExp 0 ke, (ERel 0, loc)), loc)), loc) - val e' = (EApp (e', E.liftExpInExp 0 trans2), loc) - val e' = (EAbs ("x", dom, t2, e'), loc) - val e' = (EServerCall (n, es, e', dom, t2), loc) - in - exp env e' - end + val pes = map (fn (p, e) => + let + val e' = (EApp (e', e), loc) + val e' = (EApp (e', + multiLiftExpInExp (E.patBindsN p) + trans2), loc) + val e' = exp env e' + in + (p, e') + end) pes + in + (ECase (exp env ed, + pes, + {disc = con env disc, + result = (CApp ((CFfi ("Basis", "transaction"), loc), con env t2), loc)}), + loc) + end*) - | EApp ( - (EApp - ((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), loc), _), _), _), _), t3), _), - (EFfi ("Basis", "transaction_monad"), _)), _), - (EApp ((EApp - ((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), _), _), _), t1), _), t2), _), - (EFfi ("Basis", "transaction_monad"), _)), _), - trans1), _), trans2), _)), _), - trans3) => - let - val e'' = (EFfi ("Basis", "bind"), loc) - val e'' = (ECApp (e'', (CFfi ("Basis", "transaction"), loc)), loc) - val e'' = (ECApp (e'', t2), loc) - val e'' = (ECApp (e'', t3), loc) - val e'' = (EApp (e'', (EFfi ("Basis", "transaction_monad"), loc)), loc) - val e'' = (EApp (e'', (EApp (E.liftExpInExp 0 trans2, (ERel 0, loc)), loc)), loc) - val e'' = (EApp (e'', E.liftExpInExp 0 trans3), loc) - val e'' = (EAbs ("x", t1, (CApp ((CFfi ("Basis", "transaction"), loc), t3), loc), e''), loc) + | EApp ( + (EApp + ((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), loc), _), _), t1), _), t2), _), + (EFfi ("Basis", "transaction_monad"), _)), _), + (EServerCall (n, es, ke, dom, ran), _)), _), + trans2) => + let + val e' = (EFfi ("Basis", "bind"), loc) + val e' = (ECApp (e', (CFfi ("Basis", "transaction"), loc)), loc) + val e' = (ECApp (e', dom), loc) + val e' = (ECApp (e', t2), loc) + val e' = (EApp (e', (EFfi ("Basis", "transaction_monad"), loc)), loc) + val e' = (EApp (e', (EApp (E.liftExpInExp 0 ke, (ERel 0, loc)), loc)), loc) + val e' = (EApp (e', E.liftExpInExp 0 trans2), loc) + val e' = (EAbs ("x", dom, t2, e'), loc) + val e' = (EServerCall (n, es, e', dom, t2), loc) + in + exp env e' + end - val e' = (EFfi ("Basis", "bind"), loc) - val e' = (ECApp (e', (CFfi ("Basis", "transaction"), loc)), loc) - val e' = (ECApp (e', t1), loc) - val e' = (ECApp (e', t3), loc) - val e' = (EApp (e', (EFfi ("Basis", "transaction_monad"), loc)), loc) - val e' = (EApp (e', trans1), loc) - val e' = (EApp (e', e''), loc) - in - exp env e' - end + | EApp ( + (EApp + ((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), loc), mt), _), _), _), t3), _), + me), _), + (EApp ((EApp + ((EApp ((ECApp ((ECApp ((ECApp ((EFfi ("Basis", "bind"), _), _), _), t1), _), t2), _), + _), _), + trans1), _), trans2), _)), _), + trans3) => + let + val e'' = (EFfi ("Basis", "bind"), loc) + val e'' = (ECApp (e'', mt), loc) + val e'' = (ECApp (e'', t2), loc) + val e'' = (ECApp (e'', t3), loc) + val e'' = (EApp (e'', me), loc) + val e'' = (EApp (e'', (EApp (E.liftExpInExp 0 trans2, (ERel 0, loc)), loc)), loc) + val e'' = (EApp (e'', E.liftExpInExp 0 trans3), loc) + val e'' = (EAbs ("xb", t1, (CApp (mt, t3), loc), e''), loc) - | EApp (e1, e2) => - let - val e1 = exp env e1 - val e2 = exp env e2 - in - case #1 e1 of - EAbs (_, _, _, b) => exp (KnownE e2 :: deKnown env) b - | _ => (EApp (e1, e2), loc) - end + val e' = (EFfi ("Basis", "bind"), loc) + val e' = (ECApp (e', mt), loc) + val e' = (ECApp (e', t1), loc) + val e' = (ECApp (e', t3), loc) + val e' = (EApp (e', me), loc) + val e' = (EApp (e', trans1), loc) + val e' = (EApp (e', e''), loc) + (*val () = print "Before\n"*) + val ee' = exp env e' + (*val () = print "After\n"*) + in + (*Print.prefaces "Commute" [("Pre", CorePrint.p_exp CoreEnv.empty (e, loc)), + ("Mid", CorePrint.p_exp CoreEnv.empty e'), + ("env", Print.PD.string (e2s env)), + ("Post", CorePrint.p_exp CoreEnv.empty ee')];*) + ee' + end - | EAbs (x, dom, ran, e) => (EAbs (x, con env dom, con env ran, exp (UnknownE :: env) e), loc) + | EApp (e1, e2) => + let + val e1 = exp env e1 + val e2 = exp env e2 + in + case #1 e1 of + EAbs (_, _, _, b) => + ((*Print.preface ("Body", CorePrint.p_exp CoreEnv.empty b);*) + exp (KnownE e2 :: deKnown env) b) + | _ => (EApp (e1, e2), loc) + end - | ECApp (e, c) => - let - val e = exp env e - val c = con env c - in - case #1 e of - ECAbs (_, _, b) => exp (KnownC c :: deKnown env) b - | _ => (ECApp (e, c), loc) - end + | EAbs (x, dom, ran, e) => (EAbs (x, con env dom, con env ran, exp (UnknownE :: env) e), loc) - | ECAbs (x, k, e) => (ECAbs (x, kind env k, exp (UnknownC :: env) e), loc) + | ECApp (e, c) => + let + val e = exp env e + val c = con env c + in + case #1 e of + ECAbs (_, _, b) => exp (KnownC c :: deKnown env) b + | _ => (ECApp (e, c), loc) + end - | EKApp (e, k) => - let - val e = exp env e - in - case #1 e of - EKAbs (_, b) => exp (KnownK k :: deKnown env) b - | _ => (EKApp (e, kind env k), loc) - end + | ECAbs (x, k, e) => (ECAbs (x, kind env k, exp (UnknownC :: env) e), loc) - | EKAbs (x, e) => (EKAbs (x, exp (UnknownK :: env) e), loc) + | EKApp (e, k) => + let + val e = exp env e + in + case #1 e of + EKAbs (_, b) => exp (KnownK k :: deKnown env) b + | _ => (EKApp (e, kind env k), loc) + end - | ERecord xcs => (ERecord (map (fn (x, e, t) => (con env x, exp env e, con env t)) xcs), loc) - | EField (e, c, {field, rest}) => - let - val e = exp env e - val c = con env c + | EKAbs (x, e) => (EKAbs (x, exp (UnknownK :: env) e), loc) - fun default () = (EField (e, c, {field = con env field, rest = con env rest}), loc) - in - case (#1 e, #1 c) of - (ERecord xcs, CName x) => - (case List.find (fn ((CName x', _), _, _) => x' = x | _ => false) xcs of - NONE => default () - | SOME (_, e, _) => e) - | _ => default () - end + | ERecord xcs => (ERecord (map (fn (x, e, t) => (con env x, exp env e, con env t)) xcs), loc) + | EField (e, c, {field, rest}) => + let + val e = exp env e + val c = con env c - | EConcat (e1, c1, e2, c2) => - let - val e1 = exp env e1 - val e2 = exp env e2 - in - case (#1 e1, #1 e2) of - (ERecord xes1, ERecord xes2) => (ERecord (xes1 @ xes2), loc) - | _ => - let - val c1 = con env c1 - val c2 = con env c2 - in - case (#1 c1, #1 c2) of - (CRecord (k, xcs1), CRecord (_, xcs2)) => - let - val (xes1, rest) = ListUtil.foldlMap (doPart e1) [] xcs1 - val (xes2, _) = ListUtil.foldlMap (doPart e2) rest xcs2 - in - exp (deKnown env) (ERecord (xes1 @ xes2), loc) - end - | _ => (EConcat (e1, c1, e2, c2), loc) - end - end + fun default () = (EField (e, c, {field = con env field, rest = con env rest}), loc) + in + case (#1 e, #1 c) of + (ERecord xcs, CName x) => + (case List.find (fn ((CName x', _), _, _) => x' = x | _ => false) xcs of + NONE => default () + | SOME (_, e, _) => e) + | _ => default () + end - | ECut (e, c, {field, rest}) => - let - val e = exp env e - val c = con env c + | EConcat (e1, c1, e2, c2) => + let + val e1 = exp env e1 + val e2 = exp env e2 + in + case (#1 e1, #1 e2) of + (ERecord xes1, ERecord xes2) => (ERecord (xes1 @ xes2), loc) + | _ => + let + val c1 = con env c1 + val c2 = con env c2 + in + case (#1 c1, #1 c2) of + (CRecord (k, xcs1), CRecord (_, xcs2)) => + let + val (xes1, rest) = ListUtil.foldlMap (doPart e1) [] xcs1 + val (xes2, _) = ListUtil.foldlMap (doPart e2) rest xcs2 + in + exp (deKnown env) (ERecord (xes1 @ xes2), loc) + end + | _ => (EConcat (e1, c1, e2, c2), loc) + end + end - fun default () = - let - val rest = con env rest - in - case #1 rest of - CRecord (k, xcs) => - let - val (xes, _) = ListUtil.foldlMap (doPart e) [] xcs - in - exp (deKnown env) (ERecord xes, loc) - end - | _ => (ECut (e, c, {field = con env field, rest = rest}), loc) - end - in - case (#1 e, #1 c) of - (ERecord xes, CName x) => - if List.all (fn ((CName _, _), _, _) => true | _ => false) xes then - (ERecord (List.filter (fn ((CName x', _), _, _) => x' <> x - | _ => raise Fail "Reduce: ECut") xes), loc) - else - default () - | _ => default () - end + | ECut (e, c, {field, rest}) => + let + val e = exp env e + val c = con env c - | ECutMulti (e, c, {rest}) => - let - val e = exp env e - val c = con env c + fun default () = + let + val rest = con env rest + in + case #1 rest of + CRecord (k, xcs) => + let + val (xes, _) = ListUtil.foldlMap (doPart e) [] xcs + in + exp (deKnown env) (ERecord xes, loc) + end + | _ => (ECut (e, c, {field = con env field, rest = rest}), loc) + end + in + case (#1 e, #1 c) of + (ERecord xes, CName x) => + if List.all (fn ((CName _, _), _, _) => true | _ => false) xes then + (ERecord (List.filter (fn ((CName x', _), _, _) => x' <> x + | _ => raise Fail "Reduce: ECut") xes), loc) + else + default () + | _ => default () + end - fun default () = - let - val rest = con env rest - in - case #1 rest of - CRecord (k, xcs) => - let - val (xes, _) = ListUtil.foldlMap (doPart e) [] xcs - in - exp (deKnown env) (ERecord xes, loc) - end - | _ => (ECutMulti (e, c, {rest = rest}), loc) - end - in - case (#1 e, #1 c) of - (ERecord xes, CRecord (_, xcs)) => - if List.all (fn ((CName _, _), _, _) => true | _ => false) xes - andalso List.all (fn ((CName _, _), _) => true | _ => false) xcs then - (ERecord (List.filter (fn ((CName x', _), _, _) => - List.all (fn ((CName x, _), _) => x' <> x - | _ => raise Fail "Reduce: ECutMulti [1]") xcs - | _ => raise Fail "Reduce: ECutMulti [2]") xes), loc) - else - default () - | _ => default () - end + | ECutMulti (e, c, {rest}) => + let + val e = exp env e + val c = con env c - | ECase (_, [((PRecord [], _), e)], _) => exp env e - | ECase (_, [((PWild, _), e)], _) => exp env e + fun default () = + let + val rest = con env rest + in + case #1 rest of + CRecord (k, xcs) => + let + val (xes, _) = ListUtil.foldlMap (doPart e) [] xcs + in + exp (deKnown env) (ERecord xes, loc) + end + | _ => (ECutMulti (e, c, {rest = rest}), loc) + end + in + case (#1 e, #1 c) of + (ERecord xes, CRecord (_, xcs)) => + if List.all (fn ((CName _, _), _, _) => true | _ => false) xes + andalso List.all (fn ((CName _, _), _) => true | _ => false) xcs then + (ERecord (List.filter (fn ((CName x', _), _, _) => + List.all (fn ((CName x, _), _) => x' <> x + | _ => raise Fail "Reduce: ECutMulti [1]") xcs + | _ => raise Fail "Reduce: ECutMulti [2]") xes), loc) + else + default () + | _ => default () + end - | ECase (e, pes, {disc, result}) => - let - fun patBinds (p, _) = - case p of - PWild => 0 - | PVar _ => 1 - | PPrim _ => 0 - | PCon (_, _, _, NONE) => 0 - | PCon (_, _, _, SOME p) => patBinds p - | PRecord xpts => foldl (fn ((_, p, _), n) => n + patBinds p) 0 xpts + | ECase (_, [((PRecord [], _), e)], _) => exp env e + | ECase (_, [((PWild, _), e)], _) => exp env e - fun pat (all as (p, loc)) = - case p of - PWild => all - | PVar (x, t) => (PVar (x, con env t), loc) - | PPrim _ => all - | PCon (dk, pc, cs, po) => - (PCon (dk, patCon pc, map (con env) cs, Option.map pat po), loc) - | PRecord xpts => (PRecord (map (fn (x, p, t) => (x, pat p, con env t)) xpts), loc) - in - (ECase (exp env e, - map (fn (p, e) => (pat p, - exp (List.tabulate (patBinds p, fn _ => UnknownE) @ env) e)) - pes, {disc = con env disc, result = con env result}), loc) - end + | ECase (e, pes, {disc, result}) => + let + fun patBinds (p, _) = + case p of + PWild => 0 + | PVar _ => 1 + | PPrim _ => 0 + | PCon (_, _, _, NONE) => 0 + | PCon (_, _, _, SOME p) => patBinds p + | PRecord xpts => foldl (fn ((_, p, _), n) => n + patBinds p) 0 xpts - | EWrite e => (EWrite (exp env e), loc) - | EClosure (n, es) => (EClosure (n, map (exp env) es), loc) + fun pat (all as (p, loc)) = + case p of + PWild => all + | PVar (x, t) => (PVar (x, con env t), loc) + | PPrim _ => all + | PCon (dk, pc, cs, po) => + (PCon (dk, patCon pc, map (con env) cs, Option.map pat po), loc) + | PRecord xpts => (PRecord (map (fn (x, p, t) => (x, pat p, con env t)) xpts), loc) + in + (ECase (exp env e, + map (fn (p, e) => (pat p, + exp (List.tabulate (patBinds p, fn _ => UnknownE) @ env) e)) + pes, {disc = con env disc, result = con env result}), loc) + end - | ELet (x, t, e1, e2) => (ELet (x, con env t, exp env e1, exp (UnknownE :: env) e2), loc) + | EWrite e => (EWrite (exp env e), loc) + | EClosure (n, es) => (EClosure (n, map (exp env) es), loc) - | EServerCall (n, es, e, t1, t2) => (EServerCall (n, map (exp env) es, exp env e, - con env t1, con env t2), loc)) + | ELet (x, t, e1, e2) => (ELet (x, con env t, exp env e1, exp (UnknownE :: env) e2), loc) + + | EServerCall (n, es, e, t1, t2) => (EServerCall (n, map (exp env) es, exp env e, + con env t1, con env t2), loc) + in + (*if dangling (edepth' (deKnown env)) r then + (Print.prefaces "exp" [("e", CorePrint.p_exp CoreEnv.empty all), + ("r", CorePrint.p_exp CoreEnv.empty r)]; + raise Fail "!!") + else + ();*) + r + end in {kind = kind, con = con, exp = exp} end