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start enabling the dynamic database

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This commit is contained in:
Mark Thom
2019-02-28 21:49:07 -07:00
parent 9db7172bfe
commit 818a971833
16 changed files with 510 additions and 167 deletions
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36
src/prolog/lib/builtins.pl
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@@ -6,11 +6,12 @@
(>)/2, (<)/2, (=\=)/2, (=:=)/2, (-)/1, (>=)/2, (=<)/2, (,)/2,
(->)/2, (;)/2, (=..)/2, (==)/2, (\==)/2, (@=<)/2, (@>=)/2,
(@<)/2, (@>)/2, (=@=)/2, (\=@=)/2, (:)/2, bagof/3,
call_with_inference_limit/3, catch/3, current_prolog_flag/2,
expand_goal/2, expand_term/2, findall/3, findall/4, once/1,
repeat/0, set_prolog_flag/2, setof/3, setup_call_cleanup/3,
term_variables/2, throw/1, true/0, false/0, write/1,
write_canonical/1, writeq/1, write_term/2]).
call_with_inference_limit/3, catch/3, clause/2,
current_prolog_flag/2, expand_goal/2, expand_term/2,
findall/3, findall/4, once/1, repeat/0, set_prolog_flag/2,
setof/3, setup_call_cleanup/3, term_variables/2, throw/1,
true/0, false/0, write/1, write_canonical/1, writeq/1,
write_term/2]).
/* this is an implementation specific declarative operator used to implement call_with_inference_limit/3
and setup_call_cleanup/3. switches to the default trust_me and retry_me_else. Indexing choice
@@ -372,7 +373,7 @@ throw(Ball) :- '$set_ball'(Ball), '$unwind_stack'.
truncate_lh_to(LhLength) :- '$truncate_lh_to'(LhLength).
check_for_compat_list(L, PI) :-
check_for_compat_list(L, PI) :-
( nonvar(L), L \= [_|_], throw(error(type_error(list, L), PI))
; true
).
@@ -453,3 +454,26 @@ setof(Template, Goal, Solution) :-
keysort(PairedSolutions0, PairedSolutions),
group_by_variants(PairedSolutions, GroupedSolutions),
iterate_variants_and_sort(GroupedSolutions, Witnesses, Solution).
% Clause retrieval and information.
'$clause_body_is_valid'(B) :-
( var(B) -> true
; functor(B, Name, _) -> ( Name == '.' -> throw(error(type_error(callable, B), clause/2))
; true
)
; throw(error(type_error(callable, B), clause/2))
).
clause(H, B) :-
( var(H) -> throw(error(instantiation_error, clause/2))
; functor(H, Name, Arity) -> ( Name == '.' -> throw(error(type_error(callable, H), clause/2))
%% '$no_such_predicate' fails if H is not callable.
; '$no_such_predicate'(H) -> '$fail'
; '$head_is_dynamic'(H) -> '$clause_body_is_valid'(B),
'$get_clause'(H, B)
; throw(error(permission_error(access, private_procedure, Name/Arity),
clause/2))
)
; throw(error(type_error(callable, H), clause/2))
).