769 lines
22 KiB
Prolog
769 lines
22 KiB
Prolog
% Also has code from:
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% File : APPLIC.PL
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% Author : Lawrence Byrd + Richard A. O'Keefe
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% Updated: 4 August 1984 and Ken Johnson 11-8-87
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% Purpose: Various "function" application routines based on apply/2.
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% Needs : append/3 from listut.pl
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% File : apply_macros.yap
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% Author : E. Alphonse from code by Joachim Schimpf, Jan Wielemaker, Vitor Santos Costa
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% Purpose: Macros to apply a predicate to all elements
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% of a list or to all sub-terms of a term.
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:- module(maplist, [selectlist/3,
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checklist/2,
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maplist/2, % :Goal, +List
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maplist/3, % :Goal, ?List1, ?List2
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maplist/4, % :Goal, ?List1, ?List2, ?List
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maplist/5, % :Goal, ?List1, ?List2, ?List3, List4
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convlist/3,
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mapargs/3,
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sumargs/4,
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mapnodes/3,
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checknodes/2,
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sumlist/4,
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sumnodes/4,
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include/3,
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exclude/3,
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partition/4,
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partition/5
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]).
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:- meta_predicate
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selectlist(2,+,-),
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checklist(1,+),
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maplist(1,+),
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maplist(2,+,-),
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maplist(3,+,+,-),
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maplist(4,+,+,+,-),
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convlist(2,+,-),
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mapargs(2,+,-),
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mapargs_args(2,+,-,+),
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sumargs(3,+,+,-),
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sumargs_args(3,+,+,-,+),
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mapnodes(2,+,-),
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mapnodes_list(2,+,-),
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checknodes(1,+),
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checknodes_list(1,+),
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sumlist(3,+,+,-),
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sumnodes(3,+,+,-),
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sumnodes_body(3,+,+,-,+,+),
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include(1,+,-),
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exclude(1,+,-),
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partition(2,+,-,-),
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partition(2,+,-,-,-).
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:- use_module(library(lists), [append/3]).
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:- use_module(library(charsio), [format_to_chars/3, read_from_chars/2]).
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:- use_module(library(error), [must_be/2]).
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:- use_module(library(occurs), [sub_term/2]).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% Definitions for Metacalls
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%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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include(G,In,Out) :-
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selectlist(G, In, Out).
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selectlist(_, [], []).
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selectlist(Pred, [In|ListIn], ListOut) :-
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(call(Pred, In) ->
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ListOut = [In|NewListOut]
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;
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ListOut = NewListOut
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),
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selectlist(Pred, ListIn, NewListOut).
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exclude(_, [], []).
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exclude(Pred, [In|ListIn], ListOut) :-
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(call(Pred, In) ->
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ListOut = NewListOut
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;
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ListOut = [In|NewListOut]
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),
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exclude(Pred, ListIn, NewListOut).
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partition(_, [], [], []).
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partition(Pred, [In|ListIn], List1, List2) :-
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(call(Pred, In) ->
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List1 = [In|RList1],
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List2 = RList2
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;
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List1 = RList1,
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List2 = [In|RList2]
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),
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partition(Pred, ListIn, RList1, RList2).
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partition(_, [], [], [], []).
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partition(Pred, [In|ListIn], List1, List2, List3) :-
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call(Pred, In, Diff),
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( Diff == (<) ->
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List1 = [In|RList1],
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List2 = RList2,
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List3 = RList3
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;
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Diff == (=) ->
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List1 = RList1,
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List2 = [In|RList2],
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List3 = RList3
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;
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Diff == (>) ->
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List1 = RList1,
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List2 = RList2,
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List3 = [In|RList3]
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;
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must_be(oneof([<,=,>]), Diff)
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),
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partition(Pred, ListIn, RList1, RList2, RList3).
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checklist(_, []).
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checklist(Pred, [In|ListIn]) :-
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call(Pred, In),
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checklist(Pred, ListIn).
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% maplist(Pred, OldList)
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% succeeds when Pred(Old,New) succeeds for each corresponding
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% Old in OldList, New in NewList. In InterLisp, this is MAPCAR.
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% It is also MAP2C. Isn't bidirectionality wonderful?
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maplist(_, []).
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maplist(Pred, [In|ListIn]) :-
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call(Pred, In),
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maplist(Pred, ListIn).
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% maplist(Pred, OldList, NewList)
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% succeeds when Pred(Old,New) succeeds for each corresponding
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% Old in OldList, New in NewList. In InterLisp, this is MAPCAR.
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% It is also MAP2C. Isn't bidirectionality wonderful?
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maplist(_, [], []).
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maplist(Pred, [In|ListIn], [Out|ListOut]) :-
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call(Pred, In, Out),
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maplist(Pred, ListIn, ListOut).
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% maplist(Pred, List1, List2, List3)
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% succeeds when Pred(Old,New) succeeds for each corresponding
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% Gi in Listi, New in NewList. In InterLisp, this is MAPCAR.
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% It is also MAP2C. Isn't bidirectionality wonderful?
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maplist(_, [], [], []).
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maplist(Pred, [A1|L1], [A2|L2], [A3|L3]) :-
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call(Pred, A1, A2, A3),
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maplist(Pred, L1, L2, L3).
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% maplist(Pred, List1, List2, List3, List4)
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% succeeds when Pred(Old,New) succeeds for each corresponding
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% Gi in Listi, New in NewList. In InterLisp, this is MAPCAR.
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% It is also MAP2C. Isn't bidirectionality wonderful?
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maplist(_, [], [], [], []).
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maplist(Pred, [A1|L1], [A2|L2], [A3|L3], [A4|L4]) :-
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call(Pred, A1, A2, A3, A4),
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maplist(Pred, L1, L2, L3, L4).
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% convlist(Rewrite, OldList, NewList)
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% is a sort of hybrid of maplist/3 and sublist/3.
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% Each element of NewList is the image under Rewrite of some
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% element of OldList, and order is preserved, but elements of
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% OldList on which Rewrite is undefined (fails) are not represented.
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% Thus if foo(X,Y) :- integer(X), Y is X+1.
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% then convlist(foo, [1,a,0,joe(99),101], [2,1,102]).
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convlist(_, [], []).
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convlist(Pred, [Old|Olds], NewList) :-
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call(Pred, Old, New),
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!,
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NewList = [New|News],
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convlist(Pred, Olds, News).
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convlist(Pred, [_|Olds], News) :-
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convlist(Pred, Olds, News).
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mapargs(Pred, TermIn, TermOut) :-
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functor(TermIn, F, N),
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functor(TermOut, F, N),
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mapargs_args(Pred, TermIn, TermOut, N).
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mapargs_args(_, _, _, 0) :- !.
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mapargs_args(Pred, TermIn, TermOut, I) :-
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arg(I, TermIn, InArg),
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arg(I, TermOut, OutArg),
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I1 is I-1,
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call(Pred, InArg, OutArg),
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mapargs_args(Pred, TermIn, TermOut, I1).
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sumargs(Pred, Term, A0, A1) :-
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functor(Term, _, N),
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sumargs(Pred, Term, A0, A1, N).
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sumargs_args(_, _, A0, A1, 0) :-
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!,
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A0 = A1.
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sumargs_args(Pred, Term, A1, A3, N) :-
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arg(N, Term, Arg),
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N1 is N - 1,
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call(Pred, Arg, A1, A2),
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sumargs_args(Pred, Term, A2, A3, N1).
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mapnodes(Pred, TermIn, TermOut) :-
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(atomic(TermIn); var(TermIn)), !,
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call(Pred, TermIn, TermOut).
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mapnodes(Pred, TermIn, TermOut) :-
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call(Pred, TermIn, Temp),
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Temp =.. [Func|ArgsIn],
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mapnodes_list(Pred, ArgsIn, ArgsOut),
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TermOut =.. [Func|ArgsOut].
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mapnodes_list(_, [], []).
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mapnodes_list(Pred, [TermIn|ArgsIn], [TermOut|ArgsOut]) :-
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mapnodes(Pred, TermIn, TermOut),
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mapnodes_list(Pred, ArgsIn, ArgsOut).
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checknodes(Pred, Term) :-
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(atomic(Term); var(Term)), !,
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call(Pred, Term).
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checknodes(Pred, Term) :-
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call(Pred, Term),
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Term =.. [_|Args],
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checknodes_list(Pred, Args).
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checknodes_list(_, []).
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checknodes_list(Pred, [Term|Args]) :-
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checknodes_body(Pred, Term),
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checknodes_list(Pred, Args).
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sumlist(_, [], Acc, Acc).
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sumlist(Pred, [H|T], AccIn, AccOut) :-
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call(Pred, H, AccIn, A1),
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sumlist(Pred, T, A1, AccOut).
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sumnodes(Pred, Term, A0, A2) :-
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call(Pred, Term, A0, A1),
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(compound(Term) ->
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functor(Term, _, N),
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sumnodes_body(Pred, Term, A1, A2, 0, N)
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; % simple term or variable
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A1 = A2
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).
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sumnodes_body(Pred, Term, A1, A3, N0, Ar) :-
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N0 < Ar ->
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N is N0+1,
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arg(N, Term, Arg),
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sumnodes(Pred, Arg, A1, A2),
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sumnodes_body(Pred, Term, A2, A3, N, Ar)
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;
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A1 = A3.
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:- dynamic number_of_expansions/1.
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number_of_expansions(0).
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goal_expansion(checklist(Meta, List), Mod:Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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prolog_load_context(module, Mod),
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto),
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!,
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% the new goal
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pred_name(checklist, 2, Proto, GoalName),
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append(MetaVars, [List], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[]], Base),
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append_args(HeadPrefix, [[In|Ins]], RecursionHead),
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append_args(Pred, [In], Apply),
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append_args(HeadPrefix, [Ins], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :- Apply, RecursiveCall)
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], Mod).
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goal_expansion(maplist(Meta, List), Mod:Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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prolog_load_context(module, Mod),
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto),
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!,
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% the new goal
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pred_name(maplist, 2, Proto, GoalName),
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append(MetaVars, [List], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[]], Base),
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append_args(HeadPrefix, [[In|Ins]], RecursionHead),
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append_args(Pred, [In], Apply),
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append_args(HeadPrefix, [Ins], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :- Apply, RecursiveCall)
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], Mod).
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goal_expansion(maplist(Meta, ListIn, ListOut), Mod:Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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prolog_load_context(module, Mod),
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto),
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!,
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% the new goal
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pred_name(maplist, 3, Proto, GoalName),
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append(MetaVars, [ListIn, ListOut], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], []], Base),
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append_args(HeadPrefix, [[In|Ins], [Out|Outs]], RecursionHead),
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append_args(Pred, [In, Out], Apply),
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append_args(HeadPrefix, [Ins, Outs], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :- Apply, RecursiveCall)
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], Mod).
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goal_expansion(maplist(Meta, L1, L2, L3), Mod:Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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prolog_load_context(module, Mod),
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto),
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!,
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% the new goal
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pred_name(maplist, 4, Proto, GoalName),
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append(MetaVars, [L1, L2, L3], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], [], []], Base),
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append_args(HeadPrefix, [[A1|A1s], [A2|A2s], [A3|A3s]], RecursionHead),
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append_args(Pred, [A1, A2, A3], Apply),
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append_args(HeadPrefix, [A1s, A2s, A3s], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :- Apply, RecursiveCall)
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], Mod).
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goal_expansion(maplist(Meta, L1, L2, L3, L4), Mod:Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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prolog_load_context(module, Mod),
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto),
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!,
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% the new goal
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pred_name(maplist, 5, Proto, GoalName),
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append(MetaVars, [L1, L2, L3, L4], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], [], [], []], Base),
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append_args(HeadPrefix, [[A1|A1s], [A2|A2s], [A3|A3s], [A4|A4s]], RecursionHead),
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append_args(Pred, [A1, A2, A3, A4], Apply),
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append_args(HeadPrefix, [A1s, A2s, A3s, A4s], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :- Apply, RecursiveCall)
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], Mod).
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goal_expansion(selectlist(Meta, ListIn, ListOut), Mod:Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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prolog_load_context(module, Mod),
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto),
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!,
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% the new goal
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pred_name(selectlist, 3, Proto, GoalName),
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append(MetaVars, [ListIn, ListOut], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], []], Base),
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append_args(HeadPrefix, [[In|Ins], Outs], RecursionHead),
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append_args(Pred, [In], Apply),
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append_args(HeadPrefix, [Ins, NOuts], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :-
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(Apply -> Outs = [In|NOuts]; Outs = NOuts),
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RecursiveCall)
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], Mod).
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% same as selectlist
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goal_expansion(include(Meta, ListIn, ListOut), Mod:Goal) :-
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goal_expansion_allowed,
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callable(Meta),
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prolog_load_context(module, Mod),
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto),
|
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!,
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% the new goal
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pred_name(include, 3, Proto, GoalName),
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append(MetaVars, [ListIn, ListOut], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
|
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% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
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append_args(HeadPrefix, [[], []], Base),
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append_args(HeadPrefix, [[In|Ins], Outs], RecursionHead),
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append_args(Pred, [In], Apply),
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append_args(HeadPrefix, [Ins, NOuts], RecursiveCall),
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compile_aux([
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Base,
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(RecursionHead :-
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(Apply -> Outs = [In|NOuts]; Outs = NOuts),
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RecursiveCall)
|
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], Mod).
|
|
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goal_expansion(exclude(Meta, ListIn, ListOut), Mod:Goal) :-
|
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goal_expansion_allowed,
|
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callable(Meta),
|
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prolog_load_context(module, Mod),
|
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aux_preds(Meta, MetaVars, Pred, PredVars, Proto),
|
|
!,
|
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% the new goal
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pred_name(exclude, 3, Proto, GoalName),
|
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append(MetaVars, [ListIn, ListOut], GoalArgs),
|
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Goal =.. [GoalName|GoalArgs],
|
|
% the new predicate declaration
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HeadPrefix =.. [GoalName|PredVars],
|
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append_args(HeadPrefix, [[], []], Base),
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append_args(HeadPrefix, [[In|Ins], Outs], RecursionHead),
|
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append_args(Pred, [In], Apply),
|
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append_args(HeadPrefix, [Ins, NOuts], RecursiveCall),
|
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compile_aux([
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Base,
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(RecursionHead :-
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(Apply -> Outs = NOuts; Outs = [In|NOuts]),
|
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RecursiveCall)
|
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], Mod).
|
|
|
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goal_expansion(partition(Meta, ListIn, List1, List2), Mod:Goal) :-
|
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goal_expansion_allowed,
|
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callable(Meta),
|
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prolog_load_context(module, Mod),
|
|
aux_preds(Meta, MetaVars, Pred, PredVars, Proto),
|
|
!,
|
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% the new goal
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pred_name(partition, 4, Proto, GoalName),
|
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append(MetaVars, [ListIn, List1, List2], GoalArgs),
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Goal =.. [GoalName|GoalArgs],
|
|
% the new predicate declaration
|
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HeadPrefix =.. [GoalName|PredVars],
|
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append_args(HeadPrefix, [[], [], []], Base),
|
|
append_args(HeadPrefix, [[In|Ins], Outs1, Outs2], RecursionHead),
|
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append_args(Pred, [In], Apply),
|
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append_args(HeadPrefix, [Ins, NOuts1, NOuts2], RecursiveCall),
|
|
compile_aux([
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Base,
|
|
(RecursionHead :-
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(Apply -> Outs1 = [In|NOuts1], Outs2 = NOuts2; Outs1 = NOuts1, Outs2 = [In|NOuts2]),
|
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RecursiveCall)
|
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], Mod).
|
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|
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goal_expansion(partition(Meta, ListIn, List1, List2, List3), Mod:Goal) :-
|
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goal_expansion_allowed,
|
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callable(Meta),
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prolog_load_context(module, Mod),
|
|
aux_preds(Meta, MetaVars, Pred, PredVars, Proto),
|
|
!,
|
|
% the new goal
|
|
pred_name(partition2, 5, Proto, GoalName),
|
|
append(MetaVars, [ListIn, List1, List2, List3], GoalArgs),
|
|
Goal =.. [GoalName|GoalArgs],
|
|
% the new predicate declaration
|
|
HeadPrefix =.. [GoalName|PredVars],
|
|
append_args(HeadPrefix, [[], [], [], []], Base),
|
|
append_args(HeadPrefix, [[In|Ins], Outs1, Outs2, Outs3], RecursionHead),
|
|
append_args(Pred, [In,Diff], Apply),
|
|
append_args(HeadPrefix, [Ins, NOuts1, NOuts2, NOuts3], RecursiveCall),
|
|
compile_aux([
|
|
Base,
|
|
(RecursionHead :-
|
|
Apply,
|
|
(Diff == (<) ->
|
|
Outs1 = [In|NOuts1],
|
|
Outs2 = NOuts2,
|
|
Outs3 = NOuts3
|
|
;
|
|
Diff == (=) ->
|
|
Outs1 = NOuts1,
|
|
Outs2 = [In|NOuts2],
|
|
Outs3 = NOuts3
|
|
;
|
|
Diff == (>) ->
|
|
Outs1 = NOuts1,
|
|
Outs2 = NOuts2,
|
|
Outs3 = [In|NOuts3]
|
|
;
|
|
error:must_be(oneof([<,=,>]), Diff)
|
|
),
|
|
RecursiveCall)
|
|
], Mod).
|
|
|
|
goal_expansion(convlist(Meta, ListIn, ListOut), Mod:Goal) :-
|
|
goal_expansion_allowed,
|
|
callable(Meta),
|
|
prolog_load_context(module, Mod),
|
|
aux_preds(Meta, MetaVars, Pred, PredVars, Proto),
|
|
!,
|
|
% the new goal
|
|
pred_name(convlist, 3, Proto, GoalName),
|
|
append(MetaVars, [ListIn, ListOut], GoalArgs),
|
|
Goal =.. [GoalName|GoalArgs],
|
|
% the new predicate declaration
|
|
HeadPrefix =.. [GoalName|PredVars],
|
|
append_args(HeadPrefix, [[], []], Base),
|
|
append_args(HeadPrefix, [[In|Ins], Outs], RecursionHead),
|
|
append_args(Pred, [In, Out], Apply),
|
|
append_args(HeadPrefix, [Ins, NOuts], RecursiveCall),
|
|
compile_aux([
|
|
Base,
|
|
(RecursionHead :-
|
|
(Apply -> Outs = [Out|NOuts]; Outs = NOuts),
|
|
RecursiveCall)
|
|
], Mod).
|
|
|
|
goal_expansion(sumlist(Meta, List, AccIn, AccOut), Mod:Goal) :-
|
|
goal_expansion_allowed,
|
|
callable(Meta),
|
|
prolog_load_context(module, Mod),
|
|
aux_preds(Meta, MetaVars, Pred, PredVars, Proto),
|
|
!,
|
|
% the new goal
|
|
pred_name(sumlist, 4, Proto, GoalName),
|
|
append(MetaVars, [List, AccIn, AccOut], GoalArgs),
|
|
Goal =.. [GoalName|GoalArgs],
|
|
% the new predicate declaration
|
|
HeadPrefix =.. [GoalName|PredVars],
|
|
append_args(HeadPrefix, [[], Acc, Acc], Base),
|
|
append_args(HeadPrefix, [[In|Ins], Acc1, Acc2], RecursionHead),
|
|
append_args(Pred, [In, Acc1, Acc3], Apply),
|
|
append_args(HeadPrefix, [Ins, Acc3, Acc2], RecursiveCall),
|
|
compile_aux([
|
|
Base,
|
|
(RecursionHead :- Apply, RecursiveCall)
|
|
], Mod).
|
|
|
|
goal_expansion(mapargs(Meta, In, Out), Mod:NewGoal) :-
|
|
goal_expansion_allowed,
|
|
prolog_load_context(module, Mod),
|
|
( var(Out)
|
|
->
|
|
NewGoal = (
|
|
In =.. [F|InArgs],
|
|
maplist(Meta, InArgs, OutArgs),
|
|
Out =.. [F|OutArgs]
|
|
)
|
|
;
|
|
NewGoal = (
|
|
Out =.. [F|OutArgs],
|
|
maplist(Meta, InArgs, OutArgs),
|
|
In =.. [F|InArgs]
|
|
)
|
|
).
|
|
|
|
goal_expansion(sumargs(Meta, Term, AccIn, AccOut), Mod:Goal) :-
|
|
goal_expansion_allowed,
|
|
prolog_load_context(module, Mod),
|
|
Goal = (
|
|
Term =.. [_|TermArgs],
|
|
sumlist(Meta, TermArgs, AccIn, AccOut)
|
|
).
|
|
|
|
goal_expansion(mapnodes(Meta, InTerm, OutTerm), Mod:Goal) :-
|
|
goal_expansion_allowed,
|
|
callable(Meta),
|
|
prolog_load_context(module, Mod),
|
|
aux_preds(Meta, MetaVars, Pred, PredVars, Proto),
|
|
!,
|
|
% the new goal
|
|
pred_name(mapnodes, 3, Proto, GoalName),
|
|
append(MetaVars, [[InTerm], [OutTerm]], GoalArgs),
|
|
Goal =.. [GoalName|GoalArgs],
|
|
% the new predicate declaration
|
|
HeadPrefix =.. [GoalName|PredVars],
|
|
append_args(HeadPrefix, [[], []], Base),
|
|
append_args(HeadPrefix, [[In|Ins], [Out|Outs]], RecursionHead),
|
|
append_args(Pred, [In, Temp], Apply),
|
|
append_args(HeadPrefix, [InArgs, OutArgs], SubRecursiveCall),
|
|
append_args(HeadPrefix, [Ins, Outs], RecursiveCall),
|
|
compile_aux([
|
|
Base,
|
|
(RecursionHead :-
|
|
Apply,
|
|
(compound(Temp)
|
|
->
|
|
Temp =.. [F|InArgs],
|
|
SubRecursiveCall,
|
|
Out =.. [F|OutArgs]
|
|
;
|
|
Out = Temp
|
|
),
|
|
RecursiveCall)
|
|
], Mod).
|
|
|
|
goal_expansion(checknodes(Meta, Term), Mod:Goal) :-
|
|
goal_expansion_allowed,
|
|
callable(Meta),
|
|
prolog_load_context(module, Mod),
|
|
aux_preds(Meta, MetaVars, Pred, PredVars, Proto),
|
|
!,
|
|
% the new goal
|
|
pred_name(checknodes, 2, Proto, GoalName),
|
|
append(MetaVars, [[Term]], GoalArgs),
|
|
Goal =.. [GoalName|GoalArgs],
|
|
% the new predicate declaration
|
|
HeadPrefix =.. [GoalName|PredVars],
|
|
append_args(HeadPrefix, [[]], Base),
|
|
append_args(HeadPrefix, [[In|Ins]], RecursionHead),
|
|
append_args(Pred, [In], Apply),
|
|
append_args(HeadPrefix, [Args], SubRecursiveCall),
|
|
append_args(HeadPrefix, [Ins], RecursiveCall),
|
|
compile_aux([
|
|
Base,
|
|
(RecursionHead :-
|
|
Apply,
|
|
(compound(In)
|
|
->
|
|
In =.. [_|Args],SubRecursiveCall
|
|
;
|
|
true
|
|
),
|
|
RecursiveCall)
|
|
], Mod).
|
|
|
|
goal_expansion(sumnodes(Meta, Term, AccIn, AccOut), Mod:Goal) :-
|
|
goal_expansion_allowed,
|
|
callable(Meta),
|
|
prolog_load_context(module, Mod),
|
|
aux_preds(Meta, MetaVars, Pred, PredVars, Proto),
|
|
!,
|
|
% the new goal
|
|
pred_name(sumnodes, 4, Proto, GoalName),
|
|
append(MetaVars, [[Term], AccIn, AccOut], GoalArgs),
|
|
Goal =.. [GoalName|GoalArgs],
|
|
% the new predicate declaration
|
|
HeadPrefix =.. [GoalName|PredVars],
|
|
append_args(HeadPrefix, [[], Acc, Acc], Base),
|
|
append_args(HeadPrefix, [[In|Ins], Acc1, Acc2], RecursionHead),
|
|
append_args(Pred, [In, Acc1, Acc3], Apply),
|
|
append_args(HeadPrefix, [Args, Acc3, Acc4], SubRecursiveCall),
|
|
append_args(HeadPrefix, [Ins, Acc4, Acc2], RecursiveCall),
|
|
compile_aux([
|
|
Base,
|
|
(RecursionHead :-
|
|
Apply,
|
|
(compound(In)
|
|
->
|
|
In =.. [_|Args],SubRecursiveCall
|
|
;
|
|
Acc3 = Acc4
|
|
),
|
|
RecursiveCall)
|
|
], Mod).
|
|
|
|
/*
|
|
:- unhide('$translate_rule').
|
|
% stolen from SWI-Prolog
|
|
user:goal_expansion(phrase(NT,Xs), Mod, NTXsNil) :-
|
|
user:goal_expansion(phrase(NT,Xs,[]), Mod, NTXsNil).
|
|
user:goal_expansion(phrase(NT,Xs0,Xs), Mod, NewGoal) :-
|
|
goal_expansion_allowed,
|
|
Goal = phrase(NT,Xs0,Xs),
|
|
nonvar(NT),
|
|
catch('$translate_rule'((pseudo_nt --> NT), Rule),
|
|
error(Pat,ImplDep),
|
|
( \+ harmless_dcgexception(Pat),
|
|
throw(error(Pat,ImplDep))
|
|
)),
|
|
Rule = (pseudo_nt(Xs0c,Xsc) :- NewGoal0),
|
|
Goal \== NewGoal0,
|
|
% apply translation only if we are safe
|
|
\+ contains_illegal_dcgnt(NT), !,
|
|
( var(Xsc), Xsc \== Xs0c
|
|
-> Xs = Xsc, NewGoal1 = NewGoal0
|
|
; NewGoal1 = (NewGoal0, Xsc = Xs)
|
|
),
|
|
( var(Xs0c)
|
|
-> Xs0 = Xs0c,
|
|
NewGoal = NewGoal1
|
|
; ( Xs0 = Xs0c, NewGoal1 ) = NewGoal
|
|
).
|
|
:- hide('$translate_rule').
|
|
*/
|
|
|
|
%%%%%%%%%%%%%%%%%%%%
|
|
% utilities
|
|
%%%%%%%%%%%%%%%%%%%%
|
|
|
|
compile_aux([Clause|Clauses], Module) :-
|
|
% compile the predicat declaration if needed
|
|
( Clause = (Head :- _)
|
|
; Clause = Head ),
|
|
!,
|
|
functor(Head, F, N),
|
|
( current_predicate(Module:F/N)
|
|
->
|
|
true
|
|
;
|
|
% format("*** Creating auxiliary predicate ~q~n", [F/N]),
|
|
% checklist(portray_clause, [Clause|Clauses]),
|
|
compile_term([Clause|Clauses], Module)
|
|
).
|
|
|
|
compile_term([], _).
|
|
compile_term([Clause|Clauses], Module) :-
|
|
assert_static(Module:Clause),
|
|
compile_term(Clauses, Module).
|
|
|
|
append_args(Term, Args, NewTerm) :-
|
|
Term =.. [Meta|OldArgs],
|
|
append(OldArgs, Args, GoalArgs),
|
|
NewTerm =.. [Meta|GoalArgs].
|
|
|
|
aux_preds(Meta, _, _, _, _) :-
|
|
var(Meta), !,
|
|
fail.
|
|
aux_preds(_:Meta, MetaVars, Pred, PredVars, Proto) :- !,
|
|
aux_preds(Meta, MetaVars, Pred, PredVars, Proto).
|
|
aux_preds(Meta, MetaVars, Pred, PredVars, Proto) :-
|
|
Meta =.. [F|Args],
|
|
aux_args(Args, MetaVars, PredArgs, PredVars, ProtoArgs),
|
|
Pred =.. [F|PredArgs],
|
|
Proto =.. [F|ProtoArgs].
|
|
|
|
aux_args([], [], [], [], []).
|
|
aux_args([Arg|Args], MVars, [Arg|PArgs], PVars, [Arg|ProtoArgs]) :-
|
|
ground(Arg), !,
|
|
aux_args(Args, MVars, PArgs, PVars, ProtoArgs).
|
|
aux_args([Arg|Args], [Arg|MVars], [PVar|PArgs], [PVar|PVars], ['_'|ProtoArgs]) :-
|
|
aux_args(Args, MVars, PArgs, PVars, ProtoArgs).
|
|
|
|
pred_name(Macro, Arity, _ , Name) :-
|
|
transformation_id(Id),
|
|
atomic_concat(['$$$__Auxiliary_predicate__ for ',Macro,'/',Arity,' ',Id], Name).
|
|
|
|
transformation_id(Id) :-
|
|
retract(number_of_expansions(Id)),
|
|
Id1 is Id+1,
|
|
assert(number_of_expansions(Id1)).
|
|
|
|
harmless_dcgexception(instantiation_error). % ex: phrase(([1],x:X,[3]),L)
|
|
harmless_dcgexception(type_error(callable,_)). % ex: phrase(27,L)
|
|
|
|
|
|
%% contains_illegal_dcgnt(+Term) is semidet.
|
|
%
|
|
% True if Term contains a non-terminal we cannot deal with using
|
|
% goal-expansion. The test is too general approximation, but safe.
|
|
|
|
contains_illegal_dcgnt(NT) :-
|
|
sub_term(I, NT),
|
|
nonvar(I),
|
|
( I = ! ; I = phrase(_,_,_) ), !.
|
|
% write(contains_illegal_nt(NT)), % JW: we do not want to write
|
|
% nl.
|
|
|
|
goal_expansion_allowed :-
|
|
once( prolog_load_context(_, _) ), % make sure we are compiling.
|
|
\+ current_prolog_flag(xref, true).
|
|
|