--- a/src/HOL/Tools/set_comprehension_pointfree.ML Thu Nov 08 16:25:26 2012 +0100
+++ b/src/HOL/Tools/set_comprehension_pointfree.ML Thu Nov 08 17:06:59 2012 +0100
@@ -289,7 +289,7 @@
(0 upto (length vs - 1))
val (pats, fm) =
mk_formula ((x, T) :: vs) (foldr1 HOLogic.mk_conj (conjs' @ map mk_mem_UNIV unused_bounds))
- fun mk_set (Atom pt) = (case map (lookup pt) pats of [t'] => t' | ts => foldr1 mk_sigma ts)
+ fun mk_set (Atom pt) = foldr1 mk_sigma (map (lookup pt) pats)
| mk_set (Un (f1, f2)) = mk_sup (mk_set f1, mk_set f2)
| mk_set (Int (f1, f2)) = mk_inf (mk_set f1, mk_set f2)
val pat = foldr1 (mk_prod1 Ts) (map (term_of_pattern Ts) pats)