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yap-6.3/pl/newmod.yap
Vítor Santos Costa 17ef6ddf34 singletons
2016-03-06 01:09:43 +00:00

212 lines
9.0 KiB
Prolog

/**
@pred module(+M) is det
set the type-in module
Defines _M_ to be the current working or type-in module. All files
which are not bound to a module are assumed to belong to the working
module (also referred to as type-in module). To compile a non-module
file into a module which is not the working one, prefix the file name
with the module name, in the form ` _Module_: _File_`, when
loading the file.
**/
module(N) :-
var(N),
'$do_error'(instantiation_error,module(N)).
module(N) :-
atom(N), !,
% set it as current module.
'$current_module'(_,N).
module(N) :-
'$do_error'(type_error(atom,N),module(N)).
/**
\pred module(+ Module:atom, +ExportList:list) is directive
define a new module
This directive defines the file where it appears as a _module file_;
it must be the first declaration in the file. _Module_ must be an
atom specifying the module name; _ExportList_ must be a list
containing the module's public predicates specification, in the form
`[predicate_name/arity,...]`. The _ExportList_ can include
operator declarations for operators that are exported by the module.
The public predicates of a module file can be made accessible to other
files through loading the source file, using the directives
use_module/1 or use_module/2,
ensure_loaded/1 and the predicates
consult/1 or reconsult/1. The
non-public predicates of a module file are not supposed to be visible
to other modules; they can, however, be accessed by prefixing the module
name with the `:/2` operator.
**/
'$module_dec'(system(N, Ss), Ps) :- !,
new_system_module(N),
'$mk_system_predicates'( Ss , N ),
'$module_dec'(N, Ps).
'$module_dec'(system(N), Ps) :- !,
new_system_module(N),
% '$mk_system_predicates'( Ps , N ),
'$module_dec'(N, Ps).
'$module_dec'(N, Ps) :-
source_location(F,_Line),
'$nb_getval'( '$user_source_file', F0 , fail),
'$add_module_on_file'(N, F, F0, Ps),
'$current_module'(_,N).
'$mk_system_predicates'( Ps, _N ) :-
lists:member(Name/A , Ps),
functor(P,Name,A),
'$new_system_predicate'(P, prolog),
fail.
'$mk_system_predicates'( _Ps, _N ).
'$module'(_,N,P) :-
'$module_dec'(N,P).
'$add_module_on_file'(DonorMod, DonorF, SourceF, Exports) :-
recorded('$module','$module'(OtherF, DonorMod, _, _, _),R),
% the module has been found, are we reconsulting?
(
DonorF \= OtherF
->
'$do_error'(permission_error(module,redefined,DonorMod, OtherF, DonorF),module(DonorMod,Exports))
;
recorded('$module','$module'(DonorF,DonorMod, SourceF, _, _), R),
erase( R ),
fail
).
'$add_module_on_file'(DonorM, DonorF, SourceF, Exports) :-
'$current_module'( HostM ),
( recorded('$module','$module'( HostF, HostM, _, _, _),_) -> true ; HostF = user_input ),
% first build the initial export table
'$convert_for_export'(all, Exports, DonorM, HostM, TranslationTab, AllExports0, load_files),
sort( AllExports0, AllExports ),
( source_location(_, Line) -> true ; Line = 0 ),
'$add_to_imports'(TranslationTab, DonorM, DonorM), % insert ops, at least for now
% last, export everything to the host: if the loading crashed you didn't actually do
% no evil.
recorda('$module','$module'(DonorF,DonorM,SourceF, AllExports, Line),_),
( recorded('$source_file','$source_file'( DonorF, Time, _), R), erase(R),
recorda('$source_file','$source_file'( DonorF, Time, DonorM), _) ).
'$convert_for_export'(all, Exports, _Module, _ContextModule, Tab, MyExports, _) :-
'$simple_conversion'(Exports, Tab, MyExports).
'$convert_for_export'([], Exports, Module, ContextModule, Tab, MyExports, Goal) :-
'$clean_conversion'([], Exports, Module, ContextModule, Tab, MyExports, Goal).
'$convert_for_export'([P1|Ps], Exports, Module, ContextModule, Tab, MyExports, Goal) :-
'$clean_conversion'([P1|Ps], Exports, Module, ContextModule, Tab, MyExports, Goal).
'$convert_for_export'(except(Excepts), Exports, Module, ContextModule, Tab, MyExports, Goal) :-
'$neg_conversion'(Excepts, Exports, Module, ContextModule, MyExports, Goal),
'$simple_conversion'(MyExports, Tab, _).
'$simple_conversion'([], [], []).
'$simple_conversion'([F/N|Exports], [F/N-F/N|Tab], [F/N|E]) :-
'$simple_conversion'(Exports, Tab, E).
'$simple_conversion'([F//N|Exports], [F/N2-F/N2|Tab], [F/N2|E]) :-
N2 is N+1,
'$simple_conversion'(Exports, Tab, E).
'$simple_conversion'([F/N as NF|Exports], [F/N-NF/N|Tab], [NF/N|E]) :-
'$simple_conversion'(Exports, Tab, E).
'$simple_conversion'([F//N as NF|Exports], [F/N2-NF/N2|Tab], [NF/N2|E]) :-
N2 is N+1,
'$simple_conversion'(Exports, Tab, E).
'$simple_conversion'([op(Prio,Assoc,Name)|Exports], [op(Prio,Assoc,Name)|Tab], [op(Prio,Assoc,Name)|E]) :-
'$simple_conversion'(Exports, Tab, E).
'$clean_conversion'([], _, _, _, [], [], _).
'$clean_conversion'([(N1/A1 as N2)|Ps], List, Module, ContextModule, [N1/A1-N2/A1|Tab], [N2/A1|MyExports], Goal) :- !,
( lists:memberchk(N1/A1, List)
->
true
;
'$bad_export'((N1/A1 as N2), Module, ContextModule)
),
'$clean_conversion'(Ps, List, Module, ContextModule, Tab, MyExports, Goal).
'$clean_conversion'([N1/A1|Ps], List, Module, ContextModule, [N1/A1-N1/A1|Tab], [N1/A1|MyExports], Goal) :- !,
(
lists:memberchk(N1/A1, List)
->
true
;
'$bad_export'(N1/A1, Module, ContextModule)
),
'$clean_conversion'(Ps, List, Module, ContextModule, Tab, MyExports, Goal).
'$clean_conversion'([N1//A1|Ps], List, Module, ContextModule, [N1/A2-N1/A2|Tab], [N1/A2|MyExports], Goal) :- !,
A2 is A1+2,
(
lists:memberchk(N1/A2, List)
->
true
;
'$bad_export'(N1//A1, Module, ContextModule)
),
'$clean_conversion'(Ps, List, Module, ContextModule, Tab, MyExports, Goal).
'$clean_conversion'([N1//A1 as N2|Ps], List, Module, ContextModule, [N2/A2-N1/A2|Tab], [N2/A2|MyExports], Goal) :- !,
A2 is A1+2,
(
lists:memberchk(N2/A2, List)
->
true
;
'$bad_export'((N1//A1 as A2), Module, ContextModule)
),
'$clean_conversion'(Ps, List, Module, ContextModule, Tab, MyExports, Goal).
'$clean_conversion'([op(Prio,Assoc,Name)|Ps], List, Module, ContextModule, [op(Prio,Assoc,Name)|Tab], [op(Prio,Assoc,Name)|MyExports], Goal) :- !,
(
lists:memberchk(op(Prio,Assoc,Name), List)
->
true
;
'$bad_export'(op(Prio,Assoc,Name), Module, ContextModule)
),
'$clean_conversion'(Ps, List, Module, ContextModule, Tab, MyExports, Goal).
'$clean_conversion'([P|_], _List, _, _, _, _, Goal) :-
'$do_error'(domain_error(module_export_predicates,P), Goal).
'$bad_export'(_, _Module, _ContextModule) :- !.
'$bad_export'(Name/Arity, Module, ContextModule) :-
functor(P, Name, Arity),
predicate_property(Module:P, _), !,
print_message(warning, declaration(Name/Arity, Module, ContextModule, private)).
'$bad_export'(Name//Arity, Module, ContextModule) :-
Arity2 is Arity+2,
functor(P, Name, Arity2),
predicate_property(Module:P, _), !,
print_message(warning, declaration(Name/Arity, Module, ContextModule, private)).
'$bad_export'(Indicator, Module, ContextModule) :- !,
print_message(warning, declaration( Indicator, Module, ContextModule, undefined)).
'$neg_conversion'([], Exports, _, _, Exports, _).
'$neg_conversion'([N1/A1|Ps], List, Module, ContextModule, MyExports, Goal) :- !,
(
lists:delete(List, N1/A1, RList)
->
'$neg_conversion'(Ps, RList, Module, ContextModule, MyExports, Goal)
;
'$bad_export'(N1/A1, Module, ContextModule)
).
'$neg_conversion'([N1//A1|Ps], List, Module, ContextModule, MyExports, Goal) :- !,
A2 is A1+2,
(
lists:delete(List, N1/A2, RList)
->
'$neg_conversion'(Ps, RList, Module, ContextModule, MyExports, Goal)
;
'$bad_export'(N1//A1, Module, ContextModule)
).
'$neg_conversion'([op(Prio,Assoc,Name)|Ps], List, Module, ContextModule, MyExports, Goal) :- !,
(
lists:delete(List, op(Prio,Assoc,Name), RList)
->
'$neg_conversion'(Ps, RList, Module, ContextModule, MyExports, Goal)
;
'$bad_export'(op(Prio,Assoc,Name), Module, ContextModule)
).
'$clean_conversion'([P|_], _List, _, _, _, Goal) :-
'$do_error'(domain_error(module_export_predicates,P), Goal).