69 lines
2.0 KiB
Prolog
Executable File
69 lines
2.0 KiB
Prolog
Executable File
/*************************************************************************
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* *
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* YAP Prolog *
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: protect.yap *
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* Last rev: *
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* mods: *
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* comments: protecting the system functions *
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* *
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*************************************************************************/
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:- system_module( '$_protect', [], ['$protect'/0]).
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% This protects all code from further changes
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% and also makes it impossible from some predicates to be seen
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'$protect' :-
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'$current_predicate'(Name,prolog,P,_),
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M \= user,
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functor(P,Name,Arity),
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'$new_system_predicate'(Name,Arity,M),
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sub_atom(Name,0,1,_, '$'),
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functor(P,Name,Arity),
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'$hide_predicate'(P,M),
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fail.
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'$protect' :-
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'$system_module'(M),
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'$current_predicate'(Name,M,P,_),
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M \= user,
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functor(P,Name,Arity),
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'$new_system_predicate'(Name,Arity,M),
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fail.
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'$protect' :-
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current_atom(Name),
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sub_atom(Name,0,1,_, '$'),
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\+ '$visible'(Name),
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hide_atom(Name),
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fail.
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'$protect'.
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% hide all atoms who start by '$'
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'$visible'('$'). /* not $VAR */
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'$visible'('$VAR'). /* not $VAR */
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'$visible'('$dbref'). /* not stream position */
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'$visible'('$stream'). /* not $STREAM */
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'$visible'('$stream_position'). /* not stream position */
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'$visible'('$hacks').
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'$visible'('$source_location').
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'$visible'('$messages').
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'$visible'('$push_input_context').
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'$visible'('$pop_input_context').
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'$visible'('$set_source_module').
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'$visible'('$declare_module').
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'$visible'('$store_clause').
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'$visible'('$skip_list').
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'$visible'('$win_insert_menu_item').
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'$visible'('$set_predicate_attribute').
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'$visible'('$parse_quasi_quotations').
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'$visible'('$quasi_quotation').
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'$visible'('$qq_open').
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'$visible'('$live').
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'$visible'('$init_prolog').
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