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Added an example for findall/4 in builtins.pl #2996

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Added an example for findall/4 in builtins.pl #2996

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4d3cf64
Added simple example for findall/4
Jul 4, 2025
5e6451c
added an example for findall/4
Jul 4, 2025
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9 changes: 9 additions & 0 deletions src/lib/builtins.pl
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Original file line number Diff line number Diff line change
Expand Up @@ -934,6 +934,15 @@
%% findall(Template, Goal, Solutions0, Solutions1)
%
% Similar to `findall/3` but returns the solutions as the difference list Solutions0-Solutions1.
% Example:
%
% ```
% f(1,2).
% f(1,3).
% f(1,4).
% ?- findall(X-Y, f(X, Y), Solutions0,Solutions1).
% Solutions0 = [1-2,1-3,1-4|Solutions1].
% ```
findall(Template, Goal, Solutions0, Solutions1) :-
error:can_be(list, Solutions0),
error:can_be(list, Solutions1),
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