:- import set_pil_on/0,set_pil_off/0,
	  tfindall/3,
	  abolish_table_pred/1  from tables.
:- import numbervars/3 from numbervars.

son:- set_pil_on.
sof:- set_pil_off.

:- table(p/1).
:- table(r/1).
:- table(q/1).

r(X) :- p(X).
p(X) :- q(X).

q(a).
q(b).
q(c).


testcombo:-
	a(_W,_E),fail
	 ; abolish_table_pred(r/1),abolish_table_pred(q/1),
	   abolish_table_pred(p/1),b(_,_),fail
	 ; abolish_table_pred(r/1),abolish_table_pred(q/1),
	   abolish_table_pred(p/1),c(_,_),fail
	 ; abolish_table_pred(r/1),abolish_table_pred(q/1),
	   abolish_table_pred(p/1),d(_,_),fail
	 ; abolish_table_pred(r/1),abolish_table_pred(q/1),
	   abolish_table_pred(p/1),e(_,_),fail
	 ; abolish_table_pred(r/1),abolish_table_pred(q/1),
	   abolish_table_pred(p/1),f(_,_),fail
	 ; true.

/*
testcombo:-
	a(W,E),fail
	 ; abolish_table_pred(r/1),
	   abolish_table_pred(p/1),b(X,F),fail
	 ; abolish_table_pred(r/1),
	   abolish_table_pred(p/1),c(X,F),fail
	 ; abolish_table_pred(r/1),
	   abolish_table_pred(p/1),d(X,F),fail
	 ; abolish_table_pred(r/1),
	   abolish_table_pred(p/1),e(X,F),fail
	 ; abolish_table_pred(r/1),
	   abolish_table_pred(p/1),f(X,F),fail
	 ; true.
*/
a(X,F):-p(X),tfindall(X,p(X),F),write(terma(X,F)),nl.
b(X,F):-p(X),tfindall(X,r(X),F),write(termb(X,F)),nl.
c(X,F):-r(X),tfindall(X,r(X),F),write(termc(X,F)),nl.
d(X,F):-r(X),tfindall(X,p(X),F),write(termd(X,F)),nl.
e(X,F):-r(X),tfindall(X,q(X),F),write(terme(X,F)),nl.
f(X,F):-q(X),tfindall(X,q(X),F),write(termf(X,F)),nl.

alta(X,F):-son,p(X),tfindall(X,p(X),F),write(term(X,F)),sof.
alta1(X,F):-son,p(X),tfindall(Y,p(Y),F),write(term(X,F)),fail ; sof.
altb(X,F):-son,p(X),tfindall(X,r(X),F),write(term(X,F)),fail ; sof.
altb1(X,F):-son,p(X),tfindall(Y,r(Y),F),write(term(X,F)),sof.
altb2(X,F):-son,p(X),mtfindall(Y,r(Y),F),write(term(X,F)),sof.
altc(X,F):-son,r(X),tfindall(X,r(X),F),write(term(X,F)),sof.

mtfindall(_,B,_) :- call(B),fail.
mtfindall(A,B,C) :- tfindall(A,B,C).