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(* This produced an InternalError exception. That check has been removed but the
test has been included because it may be useful to revisit this. *)
type polarity = int
datatype rep =
Atom of int * int |
Struct of rep list |
Vect of int * rep |
Func of rep * rep
;
exception REP of string * rep list;
exception LIMIT of string * string;
PolyML.Compiler.maxInlineSize := 1;
fun card_of_rep (_: rep): int = (PolyML.print "card_of_rep"; raise Match);
fun is_lone_rep (_: rep): bool = (PolyML.print "is_lone_rep"; raise Match);
fun kk_case_switch _ = (PolyML.print "kk_case_switch"; raise Match);
fun all_singletons_for_rep _ = (PolyML.print "all_singletons_for_rep"; raise Match);
PolyML.Compiler.maxInlineSize := 60;
structure S
=
struct
exception E
fun vect_from_rel_expr a b c d e = (
PolyML.print a;
PolyML.print b;
PolyML.print c;
PolyML.print d;
PolyML.print e;
PolyML.print a;
PolyML.print b;
PolyML.print c;
raise E
);
fun lone_rep_fallback kk new_R old_R r =
if old_R = new_R then
r
else
let val card = card_of_rep old_R in
if is_lone_rep old_R andalso is_lone_rep new_R
andalso card = card_of_rep new_R then
if card >= 4096 then
raise LIMIT ("lone_rep_fallback",
"too high cardinality (" ^ Int.toString card ^ ")")
else
kk_case_switch kk old_R new_R r (all_singletons_for_rep old_R)
(all_singletons_for_rep new_R)
else
raise REP ("lone_rep_fallback", [old_R, new_R])
end
and atom_from_rel_expr kk (x as (k, j0)) old_R r =
case old_R of
Func (R1, R2) =>
let
val dom_card = card_of_rep R1
val R2' = case R2 of Atom _ => R2 | _ => Atom (card_of_rep R2, 0)
in
atom_from_rel_expr kk x (Vect (dom_card, R2'))
(vect_from_rel_expr kk dom_card R2' old_R r)
end
| _ => lone_rep_fallback kk (Atom x) old_R r
fun yy a kk x c d y =
(if a then atom_from_rel_expr kk (c, d) else fn _ => raise Match) y
end
;
|
