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yap-6.3/pl/protect.yap
Vítor Santos Costa 15404b3835 small
- do not call goal expansion on meta-calls (that is done by undef).
- docs updates
- fix init code
2015-12-15 09:28:43 +00:00

71 lines
2.3 KiB
Prolog
Executable File

xc/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: protect.yap *
* Last rev: *
* mods: *
* comments: protecting the system functions *
* *
*************************************************************************/
:- system_module( '$_protect', [], ['$protect'/0]).
% This protects all code from further changes
% and also makes it impossible from some predicates to be seen
'$protect' :-
'$current_predicate'(_A, M, T0, all),
%format(' ~a ~n', [M]) ,
'$system_module'(M),
'$predicate_flags'(T0, M, Flags, Flags),
% not multifile, dynamic, or logical updates.
Flags /\ (0x20000000\/0x08000000\/0x00002000) =\= 0,
NFlags is Flags \/ 0x00004000,
'$predicate_flags'(T0, M, _Flags, NFlags),
%format('~w ~16r ~16r~n', [T0,Flags, NFlags]) ,
fail.
'$protect' :-
current_atom(Name),
atom_codes(Name,[0'$|_]), %'
'$hide_predicates'(Name),
'$hide'(Name),
fail.
'$protect' :-
'$hide_predicates'(bootstrap),
hide(bootstrap).
'$protect'.
'$hide_predicates'(Name) :-
'$current_predicate'(Name, Mod, P, all),
'$hide_predicate'(P,Mod),
fail.
'$hide_predicates'(_).
% hide all atoms who start by '$'
'$hide'('$VAR') :- !, fail. /* not $VAR */
'$hide'('$dbref') :- !, fail. /* not stream position */
'$hide'('$stream') :- !, fail. /* not $STREAM */
'$hide'('$stream_position') :- !, fail. /* not stream position */
'$hide'('$hacks') :- !, fail.
'$hide'('$source_location') :- !, fail.
'$hide'('$messages') :- !, fail.
'$hide'('$push_input_context') :- !, fail.
'$hide'('$pop_input_context') :- !, fail.
'$hide'('$set_source_module') :- !, fail.
'$hide'('$declare_module') :- !, fail.
'$hide'('$store_clause') :- !, fail.
'$hide'('$skip_list') :- !, fail.
'$hide'('$win_insert_menu_item') :- !, fail.
'$hide'('$set_predicate_attribute') :- !, fail.
'$hide'('$parse_quasi_quotations') :- !, fail.
'$hide'('$quasi_quotation') :- !, fail.
'$hide'('$qq_open') :- !, fail.
'$hide'(Name) :- hide(Name), fail.