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remove unnecessary extra work in findall_with_existential/5

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This commit is contained in:
Mark Thom
2026-01-12 22:47:39 -08:00
parent e446b13376
commit c79fd74331
1 changed files with 1 additions and 14 deletions
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15
src/lib/builtins.pl
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@@ -944,17 +944,6 @@ findall(Template, Goal, Solutions0, Solutions1) :-
builtins:findall_cleanup(LhLength, Error)
).
:- non_counted_backtracking set_difference/3.
set_difference([X|Xs], [Y|Ys], Zs) :-
X == Y, !, set_difference(Xs, [Y|Ys], Zs).
set_difference([X|Xs], [Y|Ys], [X|Zs]) :-
X @< Y, !, set_difference(Xs, [Y|Ys], Zs).
set_difference([X|Xs], [Y|Ys], Zs) :-
X @> Y, !, set_difference([X|Xs], Ys, Zs).
set_difference([], _, []) :- !.
set_difference(Xs, [], Xs).
:- non_counted_backtracking iterate_variants/3.
@@ -987,9 +976,7 @@ findall_with_existential(Template, Goal, PairedSolutions, Witnesses0, Witnesses)
( Goal1 = _ ^ _ ) ->
rightmost_power(Goal1, Goal2, ExistentialVars0),
term_variables(ExistentialVars0, ExistentialVars),
sort(Witnesses0, Witnesses1),
sort(ExistentialVars, ExistentialVars1),
set_difference(Witnesses1, ExistentialVars1, Witnesses),
lists:append(Witnesses0, Witnesses, ExistentialVars),
expand_goal(M:Goal2, M, Goal3),
findall(Witnesses-Template, Goal3, PairedSolutions)
; Witnesses = Witnesses0,