8dcee4415b
much improved garbage collector improvements to compiler yaptab compiles again git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@34 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
89 lines
3.3 KiB
Prolog
89 lines
3.3 KiB
Prolog
/*************************************************************************
|
|
* *
|
|
* YAP Prolog *
|
|
* *
|
|
* Yap Prolog was developed at NCCUP - Universidade do Porto *
|
|
* *
|
|
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
|
|
* *
|
|
**************************************************************************
|
|
* *
|
|
* File: tabling.yap *
|
|
* Last rev: 8/2/88 *
|
|
* mods: *
|
|
* comments: support tabling predicates *
|
|
* *
|
|
*************************************************************************/
|
|
|
|
table(X) :- var(X), !,
|
|
write(user_error, '[ Error: argument to table/1 should be a predicate ]'),
|
|
nl(user_error),
|
|
fail.
|
|
table((A,B)) :- !, table(A), table(B).
|
|
table(A/N) :- integer(N), atom(A), !,
|
|
functor(T,A,N), $flags(T,F,F),
|
|
(
|
|
X is F /\ 8'000100, X =\= 0, !,
|
|
write(user_error, '[ Warning: '),
|
|
write(user_error, A/N),
|
|
write(user_error, ' is already declared as table ]'),
|
|
nl(user_error)
|
|
;
|
|
X is F /\ 8'170000, X =:= 0, !, $table(T)
|
|
;
|
|
write(user_error, '[ Error: '),
|
|
write(user_error, A/N),
|
|
write(user_error, ' cannot be declared as table ]'),
|
|
nl(user_error),
|
|
fail
|
|
).
|
|
table(X) :- write(user_error, '[ Error: '),
|
|
write(user_error, X),
|
|
write(user_error, ' is an invalid argument to table/1 ]'),
|
|
nl(user_error),
|
|
fail.
|
|
|
|
|
|
show_trie(X) :- var(X), !,
|
|
write(user_error, '[ Error: argument to trie/1 should be a predicate ]'),
|
|
nl(user_error),
|
|
fail.
|
|
show_trie(A/N) :- integer(N), atom(A), !,
|
|
functor(T,A,N), $flags(T,F,F),
|
|
(
|
|
X is F /\ 8'000100, X =\= 0, !, $show_trie(T,_)
|
|
;
|
|
write(user_error, '[ Error: '),
|
|
write(user_error, A/N),
|
|
write(user_error, ' is not declared as table ]'),
|
|
nl(user_error),
|
|
fail
|
|
).
|
|
show_trie(X) :- write(user_error, '[ Error: '),
|
|
write(user_error, X),
|
|
write(user_error, ' is an invalid argument to trie/1 ]'),
|
|
nl(user_error),
|
|
fail.
|
|
|
|
|
|
abolish_trie(X) :- var(X), !,
|
|
write(user_error, '[ Error: argument to abolish_trie/1 should be a predicate ]'),
|
|
nl(user_error),
|
|
fail.
|
|
abolish_trie(A/N) :- integer(N), atom(A), !,
|
|
functor(T,A,N), $flags(T,F,F),
|
|
(
|
|
X is F /\ 8'000100, X =\= 0, !, $abolish_trie(T)
|
|
;
|
|
write(user_error, '[ Error: '),
|
|
write(user_error, A/N),
|
|
write(user_error, ' is not declared as table ]'),
|
|
nl(user_error),
|
|
fail
|
|
).
|
|
abolish_trie(X) :- write(user_error, '[ Error: '),
|
|
write(user_error, X),
|
|
write(user_error, ' is an invalid argument to abolish_trie/1 ]'),
|
|
nl(user_error),
|
|
fail.
|