A.21 library(intercept): Intercept and signal interface
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Availability::- use_module(library(intercept)).(can be autoloaded)
Sourcenb_intercept_all(+Template, :Goal, ?Ball, -List)
As intercept_all/4, but backtracing inside Goal does not reset List. Consider this program and the subsequent queries 
enum_b(F, T) :- forall(between(F, T, I), send_signal(emit(I))).
?- intercept_all(I, enum_b(1, 6), emit(I), List).
List = [].

?- nb_intercept_all(I, enum_b(1, 6), emit(I), List).
List = [1, 2, 3, 4, 5, 6].