diff -r 7ca8810b1d48 -r 5407bc278c9a src/HOL/Quickcheck_Narrowing.thy
--- a/src/HOL/Quickcheck_Narrowing.thy Thu Apr 13 13:24:27 2017 +0200
+++ b/src/HOL/Quickcheck_Narrowing.thy Thu Apr 13 10:10:06 2017 +0200
@@ -104,12 +104,12 @@
definition "apply" :: "('a => 'b) narrowing => 'a narrowing => 'b narrowing"
where
"apply f a d =
- (case f d of Narrowing_cons (Narrowing_sum_of_products ps) cfs =>
- case a (d - 1) of Narrowing_cons ta cas =>
+ (case f d of Narrowing_cons (Narrowing_sum_of_products ps) cfs \
+ case a (d - 1) of Narrowing_cons ta cas \
let
- shallow = (d > 0 \ non_empty ta);
- cs = [(\xs'. (case xs' of [] => undefined | x # xs => cf xs (conv cas x))). shallow, cf <- cfs]
- in Narrowing_cons (Narrowing_sum_of_products [ta # p. shallow, p <- ps]) cs)"
+ shallow = d > 0 \ non_empty ta;
+ cs = [(\(x # xs) \ cf xs (conv cas x)). shallow, cf \ cfs]
+ in Narrowing_cons (Narrowing_sum_of_products [ta # p. shallow, p \ ps]) cs)"
definition sum :: "'a narrowing => 'a narrowing => 'a narrowing"
where