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Document non counted backtracking #2534

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merged 2 commits into from
Sep 16, 2024
+11 −3
Merged

Document non counted backtracking #2534

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c922ed8
Explain non_counted_backtracking a little bit more
hurufu Sep 6, 2024
4b0f955
Change wording for non_counted_backtracking comment
hurufu Sep 7, 2024
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1 change: 1 addition & 0 deletions src/lib/iso_ext.pl
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Expand Up @@ -223,6 +223,7 @@
%% call_with_inference_limit(Goal, Limit, Result).
%
% Similar to `call(Goal)` but it limits the number of inferences for each solution of Goal.
% Calls to it may be nested, but only the last limit will be in power.
call_with_inference_limit(G, L, R) :-
( integer(L) ->
( L < 0 ->
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13 changes: 10 additions & 3 deletions src/lib/ops_and_meta_predicates.pl
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Expand Up @@ -5,9 +5,16 @@

:- op(1199, fx, meta_predicate).

/* this is an implementation specific declarative operator used to implement call_with_inference_limit/3
and setup_call_cleanup/3. switches to the default trust_me and retry_me_else. Indexing choice
instructions are unchanged. */
% Implementation specific declarative operator used to implement
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@triska I've re-added "implementation specific" part. Merged code imho didn't change meaning of the original comment.

% call_with_inference_limit/3 and setup_call_cleanup/3. Compiler switches
% to the default trust_me, retry_me_else and some other instructions for all
% predicates that are marked with it. Indexing choice instructions are unchanged.
%
% Implementation details:
% Default instructions are not subject to inference counting, so their
% execution will not be considered if they happen to be called by
% call_with_inference_limit/3.
%
:- op(700, fx, non_counted_backtracking).

% arithmetic operators.
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