B.1 Examining the Environment Stack
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Examining the Environment Stack
prolog_current_frame/1
prolog_current_choice/1
prolog_frame_attribute/3
prolog_choice_attribute/3
deterministic/1
Packages
Availability:
built-in
[semidet]
prolog_current_choice
(
-Choice
)
Unify
Choice
with an integer provided a reference to the last choice point. Fails if the current environment has no choice points. See also
prolog_choice_attribute/3
.