/
core.pl
22055 lines (17965 loc) · 789 KB
/
core.pl
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% core compiler and runtime
%
% This file is part of Logtalk <http://logtalk.org/>
% Copyright 1998-2017 Paulo Moura <pmoura@logtalk.org>
%
% Licensed under the Apache License, Version 2.0 (the "License");
% you may not use this file except in compliance with the License.
% You may obtain a copy of the License at
%
% http://www.apache.org/licenses/LICENSE-2.0
%
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS,
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
% See the License for the specific language governing permissions and
% limitations under the License.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% operator declarations
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% message sending operators
% message sending to an explicit object
:- op(600, xfy, ::).
% message sending to "self"
:- op(600, fy, ::).
% "super" call (calls an inherited or imported method definition)
:- op(600, fy, ^^).
% imported category predicate call operator (deprecated)
:- op(600, fy, :).
% mode operators
% input argument (instantiated); ISO Prolog standard operator
:- op(200, fy, (+)).
% input/output argument
:- op(200, fy, (?)).
% input argument (not modified by the call)
:- op(200, fy, (@)).
% output argument (not instantiated); ISO Prolog standard operator
:- op(200, fy, (-)).
% ground argument
:- op(200, fy, ++).
% unbound argument (typically when returning an opaque term)
:- op(200, fy, --).
% bitwise left-shift operator (used for context-switching calls)
% some back-end Prolog compilers don't declare this ISO Prolog standard operator!
:- op(400, yfx, <<).
% bitwise right-shift operator (used for lambda expressions)
% some back-end Prolog compilers don't declare this ISO Prolog standard operator!
:- op(400, yfx, >>).
% predicate alias operator (alternative to the ::/2 or :/2 operators depending on the context)
% first introduced in SWI-Prolog and YAP also for defining aliases to module predicates
:- op(700, xfx, as).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% runtime directives (bookkeeping tables)
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% tables of defined events and monitors
% '$lgt_before_event_'(Obj, Msg, Sender, Monitor, Call)
:- dynamic('$lgt_before_event_'/5).
% '$lgt_after_event_'(Obj, Msg, Sender, Monitor, Call)
:- dynamic('$lgt_after_event_'/5).
% tables of loaded entities, entity and predicate properties, plus entity relations
% '$lgt_current_protocol_'(Ptc, Prefix, Dcl, Rnm, Flags)
:- multifile('$lgt_current_protocol_'/5).
:- dynamic('$lgt_current_protocol_'/5).
% '$lgt_current_category_'(Ctg, Prefix, Dcl, Def, Rnm, Flags)
:- multifile('$lgt_current_category_'/6).
:- dynamic('$lgt_current_category_'/6).
% '$lgt_current_object_'(Obj, Prefix, Dcl, Def, Super, IDcl, IDef, DDcl, DDef, Rnm, Flags)
:- multifile('$lgt_current_object_'/11).
:- dynamic('$lgt_current_object_'/11).
% '$lgt_entity_property_'(Entity, Property)
:- multifile('$lgt_entity_property_'/2).
:- dynamic('$lgt_entity_property_'/2).
% '$lgt_predicate_property_'(Entity, Functor/Arity, Property)
:- multifile('$lgt_predicate_property_'/3).
:- dynamic('$lgt_predicate_property_'/3).
% '$lgt_implements_protocol_'(ObjOrCtg, Ptc, Scope)
:- multifile('$lgt_implements_protocol_'/3).
:- dynamic('$lgt_implements_protocol_'/3).
% '$lgt_imports_category_'(Obj, Ctg, Scope)
:- multifile('$lgt_imports_category_'/3).
:- dynamic('$lgt_imports_category_'/3).
% '$lgt_instantiates_class_'(Instance, Class, Scope)
:- multifile('$lgt_instantiates_class_'/3).
:- dynamic('$lgt_instantiates_class_'/3).
% '$lgt_specializes_class_'(Class, Superclass, Scope)
:- multifile('$lgt_specializes_class_'/3).
:- dynamic('$lgt_specializes_class_'/3).
% '$lgt_extends_category_'(Ctg, ExtCtg, Scope)
:- multifile('$lgt_extends_category_'/3).
:- dynamic('$lgt_extends_category_'/3).
% '$lgt_extends_object_'(Prototype, Parent, Scope)
:- multifile('$lgt_extends_object_'/3).
:- dynamic('$lgt_extends_object_'/3).
% '$lgt_extends_protocol_'(Ptc, ExtPtc, Scope)
:- multifile('$lgt_extends_protocol_'/3).
:- dynamic('$lgt_extends_protocol_'/3).
% '$lgt_complemented_object_'(Obj, Ctg, Dcl, Def, Rnm)
:- dynamic('$lgt_complemented_object_'/5).
% table of loaded files
% '$lgt_loaded_file_'(Basename, Directory, Mode, Flags, TextProperties, ObjectFile, TimeStamp)
:- multifile('$lgt_loaded_file_'/7).
:- dynamic('$lgt_loaded_file_'/7).
% '$lgt_included_file_'(File, MainBasename, MainDirectory, TimeStamp)
:- multifile('$lgt_included_file_'/4).
:- dynamic('$lgt_included_file_'/4).
% '$lgt_failed_file_'(SourceFile)
:- dynamic('$lgt_failed_file_'/1).
% '$lgt_parent_file_'(SourceFile, ParentSourceFile)
:- dynamic('$lgt_parent_file_'/2).
% '$lgt_file_loading_stack_'(SourceFile, Directory)
:- dynamic('$lgt_file_loading_stack_'/2).
% runtime flag values
% '$lgt_current_flag_'(Name, Value)
:- dynamic('$lgt_current_flag_'/2).
% static binding caches
% '$lgt_send_to_obj_static_binding_'(Obj, Pred, ExCtx, Call)
:- dynamic('$lgt_send_to_obj_static_binding_'/4).
% dynamic binding lookup caches for messages and super calls
% '$lgt_send_to_obj_'(Obj, Pred, ExCtx)
:- dynamic('$lgt_send_to_obj_'/3).
% '$lgt_send_to_obj_ne_'(Obj, Pred, ExCtx)
:- dynamic('$lgt_send_to_obj_ne_'/3).
% '$lgt_send_to_self_'(Obj, Pred, ExCtx)
:- dynamic('$lgt_send_to_self_'/3).
% '$lgt_obj_super_call_'(Super, Pred, ExCtx)
:- dynamic('$lgt_obj_super_call_'/3).
% '$lgt_ctg_super_call_'(Ctg, Pred, ExCtx)
:- dynamic('$lgt_ctg_super_call_'/3).
% dynamic binding lookup cache for asserting and retracting dynamic facts
% '$lgt_db_lookup_cache_'(Obj, Fact, Sender, TFact, UClause)
:- dynamic('$lgt_db_lookup_cache_'/5).
% table of library paths
% logtalk_library_path(Library, Path)
:- multifile(logtalk_library_path/2).
:- dynamic(logtalk_library_path/2).
% extension points for logtalk_make/1
% logtalk_make_target_action(Target)
:- multifile(logtalk_make_target_action/1).
:- dynamic(logtalk_make_target_action/1).
% term- and goal-expansion default compiler hooks
% '$lgt_hook_term_expansion_'(Term, ExpandedTerms)
:- dynamic('$lgt_hook_term_expansion_'/2).
% '$lgt_hook_goal_expansion_'(Goal, ExpandedGoal)
:- dynamic('$lgt_hook_goal_expansion_'/2).
% engines
% '$lgt_current_engine_'(Object, Engine, TermQueue, Id)
:- dynamic('$lgt_current_engine_'/4).
% counters
% '$lgt_dynamic_entity_counter_'(Kind, Base, Count)
:- dynamic('$lgt_dynamic_entity_counter_'/3).
% '$lgt_threaded_tag_counter_'(Tag)
:- dynamic('$lgt_threaded_tag_counter_'/1).
% debugging hook predicates
:- multifile('$logtalk#0.trace_event#2'/3).
:- dynamic('$logtalk#0.trace_event#2'/3).
:- multifile('$logtalk#0.debug_handler_provider#1'/2).
:- multifile('$logtalk#0.debug_handler#2'/3).
% internal initialization flag
:- dynamic('$lgt_built_in_entities_loaded_'/0).
% user-defined flags
% '$lgt_user_defined_flag_'(Flag, Access, Type)
:- dynamic('$lgt_user_defined_flag_'/3).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% compiler directives
%
% (used for source file compilation and runtime creation of new entities)
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% '$lgt_pp_file_compiler_flag_'(Name, Value)
:- dynamic('$lgt_pp_file_compiler_flag_'/2).
% '$lgt_pp_entity_compiler_flag_'(Name, Value)
:- dynamic('$lgt_pp_entity_compiler_flag_'/2).
% '$lgt_pp_dcl_'(Clause)
:- dynamic('$lgt_pp_dcl_'/1).
% '$lgt_pp_def_'(Clause)
:- dynamic('$lgt_pp_def_'/1).
% '$lgt_pp_ddef_'(Clause)
:- dynamic('$lgt_pp_ddef_'/1).
% '$lgt_pp_super_'(Clause)
:- dynamic('$lgt_pp_super_'/1).
% '$lgt_pp_synchronized_'(Head, Mutex)
:- dynamic('$lgt_pp_synchronized_'/2).
% '$lgt_pp_predicate_mutex_counter_'(Count)
:- dynamic('$lgt_pp_predicate_mutex_counter_'/1).
% '$lgt_pp_dynamic_'(Head)
:- dynamic('$lgt_pp_dynamic_'/1).
% '$lgt_pp_discontiguous_'(Head)
:- dynamic('$lgt_pp_discontiguous_'/1).
% '$lgt_pp_mode_'(Mode, Determinism, File, Lines)
:- dynamic('$lgt_pp_mode_'/4).
% '$lgt_pp_public_'(Functor, Arity)
:- dynamic('$lgt_pp_public_'/2).
% '$lgt_pp_protected_'(Functor, Arity)
:- dynamic('$lgt_pp_protected_'/2).
% '$lgt_pp_private_'(Functor, Arity)
:- dynamic('$lgt_pp_private_'/2).
% '$lgt_pp_meta_predicate_'(PredTemplate, MetaTemplate)
:- dynamic('$lgt_pp_meta_predicate_'/2).
% '$lgt_pp_predicate_alias_'(Entity, Pred, Alias, NonTerminalFlag, File, Lines)
:- dynamic('$lgt_pp_predicate_alias_'/6).
% '$lgt_pp_non_terminal_'(Functor, Arity, ExtArity)
:- dynamic('$lgt_pp_non_terminal_'/3).
% '$lgt_pp_multifile_'(Head, File, Lines)
:- dynamic('$lgt_pp_multifile_'/3).
% '$lgt_pp_coinductive_'(Head, TestHead, HeadExCtx, TCHead, BodyExCtx, THead, DHead)
:- dynamic('$lgt_pp_coinductive_'/7).
% '$lgt_pp_object_'(Obj, Prefix, Dcl, Def, Super, IDcl, IDef, DDcl, DDef, Rnm, Flags)
:- dynamic('$lgt_pp_object_'/11).
% '$lgt_pp_category_'(Ctg, Prefix, Dcl, Def, Rnm, Flags)
:- dynamic('$lgt_pp_category_'/6).
% '$lgt_pp_protocol_'(Ptc, Prefix, Dcl, Rnm, Flags)
:- dynamic('$lgt_pp_protocol_'/5).
% '$lgt_pp_entity_'(Type, Entity, Prefix, Dcl, Rnm)
:- dynamic('$lgt_pp_entity_'/5).
% '$lgt_pp_module_'(Module)
:- dynamic('$lgt_pp_module_'/1).
% '$lgt_pp_uses_predicate_'(Obj, Predicate, Alias, Lines)
:- dynamic('$lgt_pp_uses_predicate_'/4).
% '$lgt_pp_uses_non_terminal_'(Obj, NonTerminal, NonTerminalAlias, Predicate, PredicateAlias, Lines)
:- dynamic('$lgt_pp_uses_non_terminal_'/6).
% '$lgt_pp_use_module_predicate_'(Module, Predicate, Alias, Lines)
:- dynamic('$lgt_pp_use_module_predicate_'/4).
% '$lgt_pp_use_module_non_terminal_'(Module, NonTerminal, NonTerminalAlias, Predicate, PredicateAlias, Lines)
:- dynamic('$lgt_pp_use_module_non_terminal_'/6).
% '$lgt_pp_entity_info_'(List)
:- dynamic('$lgt_pp_entity_info_'/1).
% '$lgt_pp_predicate_info_'(Predicate, List)
:- dynamic('$lgt_pp_predicate_info_'/2).
% '$lgt_pp_implemented_protocol_'(Ptc, ObjOrCtg, Prefix, Dcl, Scope)
:- dynamic('$lgt_pp_implemented_protocol_'/5).
% '$lgt_pp_imported_category_'(Ctg, Obj, Prefix, Dcl, Def, Scope)
:- dynamic('$lgt_pp_imported_category_'/6).
% '$lgt_pp_extended_object_'(Parent, Obj, Prefix, Dcl, Def, Super, IDcl, IDef, DDcl, DDef, Scope)
:- dynamic('$lgt_pp_extended_object_'/11).
% '$lgt_pp_instantiated_class_'(Class, Obj, Prefix, Dcl, Def, Super, IDcl, IDef, DDcl, DDef, Scope)
:- dynamic('$lgt_pp_instantiated_class_'/11).
% '$lgt_pp_specialized_class_'(Superclass, Class, Prefix, Dcl, Def, Super, IDcl, IDef, DDcl, DDef, Scope)
:- dynamic('$lgt_pp_specialized_class_'/11).
% '$lgt_pp_extended_protocol_'(ExtPtc, Ptc, Prefix, Dcl, Scope)
:- dynamic('$lgt_pp_extended_protocol_'/5).
% '$lgt_pp_extended_category_'(ExtCtg, Ctg, Prefix, Dcl, Def, Scope)
:- dynamic('$lgt_pp_extended_category_'/6).
% '$lgt_pp_complemented_object_'(Obj, Ctg, Dcl, Def, Rnm)
:- dynamic('$lgt_pp_complemented_object_'/5).
% '$lgt_pp_file_initialization_'(Goal, Lines)
:- dynamic('$lgt_pp_file_initialization_'/2).
% '$lgt_pp_file_object_initialization_'(Object, Goal, Lines)
:- dynamic('$lgt_pp_file_object_initialization_'/3).
% '$lgt_pp_object_initialization_'(Goal, SourceData, Lines)
:- dynamic('$lgt_pp_object_initialization_'/3).
% '$lgt_pp_final_object_initialization_'(Goal, Lines)
:- dynamic('$lgt_pp_final_object_initialization_'/2).
% '$lgt_pp_entity_meta_directive_'(Directive, SourceData, Lines)
:- dynamic('$lgt_pp_entity_meta_directive_'/3).
% '$lgt_pp_redefined_built_in_'(Head, ExCtx, THead)
:- dynamic('$lgt_pp_redefined_built_in_'/3).
% '$lgt_pp_directive_'(Directive)
:- dynamic('$lgt_pp_directive_'/1).
% '$lgt_pp_prolog_term_'(Term, SourceData, Lines)
:- dynamic('$lgt_pp_prolog_term_'/3).
% '$lgt_pp_entity_term_'(Term, SourceData, Lines)
:- dynamic('$lgt_pp_entity_term_'/3).
% '$lgt_pp_final_entity_term_'(Term, Lines)
:- dynamic('$lgt_pp_final_entity_term_'/2).
% '$lgt_pp_entity_aux_clause_'(Clause)
:- dynamic('$lgt_pp_entity_aux_clause_'/1).
% '$lgt_pp_final_entity_aux_clause_'(Clause)
:- dynamic('$lgt_pp_final_entity_aux_clause_'/1).
% '$lgt_pp_number_of_clauses_rules_'(Functor, Arity, NumberOfClauses, NumberOfRules)
:- dynamic('$lgt_pp_number_of_clauses_rules_'/4).
% '$lgt_pp_number_of_clauses_rules_'(Other, Functor, Arity, NumberOfClauses, NumberOfRules)
:- dynamic('$lgt_pp_number_of_clauses_rules_'/5).
% '$lgt_pp_predicate_declaration_location_'(Functor, Arity, File, Line)
:- dynamic('$lgt_pp_predicate_declaration_location_'/4).
% '$lgt_pp_predicate_definition_location_'(Functor, Arity, File, Line)
:- dynamic('$lgt_pp_predicate_definition_location_'/4).
% '$lgt_pp_defines_predicate_'(Head, Functor/Arity, ExCtx, THead, Mode, Origin)
:- dynamic('$lgt_pp_defines_predicate_'/6).
% '$lgt_pp_inline_predicate_'(Functor/Arity)
:- dynamic('$lgt_pp_inline_predicate_'/1).
% '$lgt_pp_predicate_definition_location_'(Other, Functor, Arity, File, Line)
:- dynamic('$lgt_pp_predicate_definition_location_'/5).
% '$lgt_pp_calls_predicate_'(Functor/Arity, TFunctor/TArity, HeadFunctor/HeadArity, File, Lines)
:- dynamic('$lgt_pp_calls_predicate_'/5).
% '$lgt_pp_calls_self_predicate_'(Functor/Arity, HeadFunctor/HeadArity, File, Lines)
:- dynamic('$lgt_pp_calls_self_predicate_'/4).
% '$lgt_pp_calls_super_predicate_'(Functor/Arity, HeadFunctor/HeadArity, File, Lines)
:- dynamic('$lgt_pp_calls_super_predicate_'/4).
% '$lgt_pp_updates_predicate_'(Dynamic, HeadFunctor/HeadArity, File, Lines)
:- dynamic('$lgt_pp_updates_predicate_'/4).
% '$lgt_pp_non_portable_predicate_'(Head, File, Lines)
:- dynamic('$lgt_pp_non_portable_predicate_'/3).
% '$lgt_pp_non_portable_function_'(Function, File, Lines)
:- dynamic('$lgt_pp_non_portable_function_'/3).
% '$lgt_pp_missing_meta_predicate_directive_'(Head, File, Lines)
:- dynamic('$lgt_pp_missing_meta_predicate_directive_'/3).
% '$lgt_pp_missing_dynamic_directive_'(Head, File, Lines)
:- dynamic('$lgt_pp_missing_dynamic_directive_'/3).
% '$lgt_pp_missing_discontiguous_directive_'(Head, File, Lines)
:- dynamic('$lgt_pp_missing_discontiguous_directive_'/3).
% '$lgt_pp_previous_predicate_'(Head, Mode)
:- dynamic('$lgt_pp_previous_predicate_'/2).
% '$lgt_pp_defines_non_terminal_'(Functor, Arity)
:- dynamic('$lgt_pp_defines_non_terminal_'/2).
% '$lgt_pp_calls_non_terminal_'(Functor, Arity, Lines)
:- dynamic('$lgt_pp_calls_non_terminal_'/3).
% '$lgt_pp_referenced_object_'(Object, File, Lines)
:- dynamic('$lgt_pp_referenced_object_'/3).
% '$lgt_pp_referenced_protocol_'(Protocol, File, Lines)
:- dynamic('$lgt_pp_referenced_protocol_'/3).
% '$lgt_pp_referenced_category_'(Category, File, Lines)
:- dynamic('$lgt_pp_referenced_category_'/3).
% '$lgt_pp_referenced_module_'(Module, File, Lines)
:- dynamic('$lgt_pp_referenced_module_'/3).
% '$lgt_pp_referenced_object_message_'(Object, Functor/Arity, AliasFunctor/Arity, HeadFunctor/HeadArity, File, Lines)
:- dynamic('$lgt_pp_referenced_object_message_'/6).
% '$lgt_pp_referenced_module_predicate_'(Module, Functor/Arity, AliasFunctor/Arity, HeadFunctor/HeadArity, File, Lines)
:- dynamic('$lgt_pp_referenced_module_predicate_'/6).
% '$lgt_pp_global_operator_'(Priority, Specifier, Operator)
:- dynamic('$lgt_pp_global_operator_'/3).
% '$lgt_pp_file_operator_'(Priority, Specifier, Operator)
:- dynamic('$lgt_pp_file_operator_'/3).
% '$lgt_pp_entity_operator_'(Priority, Specifier, Operator, Scope)
:- dynamic('$lgt_pp_entity_operator_'/4).
% '$lgt_pp_warnings_top_goal_'(Goal)
:- dynamic('$lgt_pp_warnings_top_goal_'/1).
% '$lgt_pp_compiling_warnings_counter_'(Counter)
:- dynamic('$lgt_pp_compiling_warnings_counter_'/1).
% '$lgt_pp_loading_warnings_counter_'(Counter)
:- dynamic('$lgt_pp_loading_warnings_counter_'/1).
% '$lgt_pp_hook_term_expansion_'(Term, Terms)
:- dynamic('$lgt_pp_hook_term_expansion_'/2).
% '$lgt_pp_hook_goal_expansion_'(Goal, ExpandedGoal)
:- dynamic('$lgt_pp_hook_goal_expansion_'/2).
% '$lgt_pp_built_in_'
:- dynamic('$lgt_pp_built_in_'/0).
% '$lgt_pp_dynamic_'
:- dynamic('$lgt_pp_dynamic_'/0).
% '$lgt_pp_threaded_'
:- dynamic('$lgt_pp_threaded_'/0).
% '$lgt_pp_file_encoding_'(LogtalkEncoding, PrologEncoding, Line)
:- dynamic('$lgt_pp_file_encoding_'/3).
% '$lgt_pp_file_bom_'(BOM)
:- dynamic('$lgt_pp_file_bom_'/1).
% '$lgt_pp_file_paths_flags_'(Basename, Directory, SourceFile, ObjectFile, Flags)
:- dynamic('$lgt_pp_file_paths_flags_'/5).
% '$lgt_pp_runtime_clause_'(Clause)
:- dynamic('$lgt_pp_runtime_clause_'/1).
% '$lgt_pp_cc_if_found_'(Goal)
:- dynamic('$lgt_pp_cc_if_found_'/1).
% '$lgt_pp_cc_skipping_'
:- dynamic('$lgt_pp_cc_skipping_'/0).
% '$lgt_pp_cc_mode_'(Action)
:- dynamic('$lgt_pp_cc_mode_'/1).
% '$lgt_pp_term_variable_names_file_lines_'(Term, VariableNames, File, Lines)
:- dynamic('$lgt_pp_term_variable_names_file_lines_'/4).
% '$lgt_pp_aux_predicate_counter_'(Counter)
:- dynamic('$lgt_pp_aux_predicate_counter_'/1).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% top-level interpreter versions of the message sending and context
% switching calls control constructs
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% top-level interpreter message sending calls
Obj::Pred :-
var(Obj),
throw(error(instantiation_error, logtalk(Obj::Pred, user))).
{Obj}::Pred :-
!,
'$lgt_comp_ctx'(Ctx, _, _, user, user, user, Obj, _, [], [], ExCtx, runtime, [], _),
'$lgt_execution_context'(ExCtx, user, user, user, Obj, [], []),
catch(
'$lgt_compile_message_to_object'(Pred, {Obj}, Call, allow, Ctx),
Error,
'$lgt_runtime_error_handler'(error(Error, logtalk({Obj}::Pred, user)))
),
( nonvar(Obj),
'$lgt_current_object_'(Obj, _, _, _, _, _, _, _, _, _, Flags),
Flags /\ 512 =:= 512 ->
% object compiled in debug mode
catch('$lgt_debug'(top_goal({Obj}::Pred, Call), ExCtx), Error, '$lgt_runtime_error_handler'(Error))
; % object not compiled in debug mode or non-existing object or invalid object identifier
catch(Call, Error, '$lgt_runtime_error_handler'(Error))
).
Obj::Pred :-
'$lgt_comp_ctx'(Ctx, _, _, user, user, user, Obj, _, [], [], ExCtx, runtime, [], _),
'$lgt_execution_context'(ExCtx, user, user, user, Obj, [], []),
catch(
'$lgt_compile_message_to_object'(Pred, Obj, Call, allow, Ctx),
Error,
'$lgt_runtime_error_handler'(error(Error, logtalk(Obj::Pred, user)))
),
( '$lgt_current_object_'(Obj, _, _, _, _, _, _, _, _, _, Flags),
Flags /\ 512 =:= 512 ->
% object compiled in debug mode
catch('$lgt_debug'(top_goal(Obj::Pred, Call), ExCtx), Error, '$lgt_runtime_error_handler'(Error))
; % object not compiled in debug mode or non-existing object
catch(Call, Error, '$lgt_runtime_error_handler'(Error))
).
% top-level interpreter context-switch calls (debugging control construct)
Obj<<Goal :-
var(Obj),
throw(error(instantiation_error, logtalk(Obj<<Goal, user))).
{Obj}<<Goal :-
!,
catch(
'$lgt_compile_context_switch_call'({Obj}, Goal, Call, user),
Error,
'$lgt_runtime_error_handler'(error(Error, logtalk({Obj}<<Goal, user)))
),
( nonvar(Obj),
'$lgt_current_object_'(Obj, _, _, _, _, _, _, _, _, _, Flags),
Flags /\ 512 =:= 512 ->
% object compiled in debug mode
'$lgt_execution_context'(ExCtx, user, user, user, Obj, [], []),
catch('$lgt_debug'(top_goal({Obj}<<Goal, Call), ExCtx), Error, '$lgt_runtime_error_handler'(Error))
; % object not compiled in debug mode or non-existing object or invalid object identifier
catch(Call, Error, '$lgt_runtime_error_handler'(Error))
).
Obj<<Goal :-
catch(
'$lgt_compile_context_switch_call'(Obj, Goal, Call, user),
Error,
'$lgt_runtime_error_handler'(error(Error, logtalk(Obj<<Goal, user)))
),
( '$lgt_current_object_'(Obj, _, _, _, _, _, _, _, _, _, Flags),
Flags /\ 512 =:= 512 ->
% object compiled in debug mode
'$lgt_execution_context'(ExCtx, user, user, user, Obj, [], []),
catch('$lgt_debug'(top_goal(Obj<<Goal, Call), ExCtx), Error, '$lgt_runtime_error_handler'(Error))
; % object not compiled in debug mode or non-existing object
catch(Call, Error, '$lgt_runtime_error_handler'(Error))
).
% '$lgt_runtime_error_handler'(@term)
%
% top-level runtime error handler
%
% it tries to decode internal predicate names and deal with variations of
% Prolog error handling due to the lack of standardization by calling an
% adapter file predicate to try to normalize the error terms
'$lgt_runtime_error_handler'(Variable) :-
var(Variable),
throw(error(instantiation_error, logtalk(throw(_), _))).
'$lgt_runtime_error_handler'(logtalk_debugger_aborted) :-
!,
'$lgt_print_message'(comment(debugging), debugger, logtalk_debugger_aborted).
'$lgt_runtime_error_handler'(error(Variable, Context)) :-
var(Variable),
throw(error(instantiation_error, logtalk(throw(_), Context))).
'$lgt_runtime_error_handler'(error(error(Error, _), Context)) :-
!,
'$lgt_runtime_error_handler'(error(Error, Context)).
'$lgt_runtime_error_handler'(error(Error, logtalk(Object::Goal, user))) :-
Object == user,
throw(error(Error, Goal)).
'$lgt_runtime_error_handler'(error(existence_error(thread,Queue), TContext)) :-
'$lgt_runtime_thread_error_handler_helper'(TContext, Context),
throw(error(existence_error(thread,Queue), Context)).
'$lgt_runtime_error_handler'(Error) :-
( '$lgt_normalize_error_term'(Error, NormalizedError) ->
'$lgt_runtime_normalized_error_handler'(NormalizedError)
; '$lgt_runtime_normalized_error_handler'(Error)
).
'$lgt_runtime_normalized_error_handler'(error(existence_error(procedure, ':'(Module,PI)), Context)) :-
% assuming we're running with a backend compiler supporting modules,
% check that the error is the context of the module where Logtalk is loaded
atom(Module),
'$lgt_user_module_qualification'(xx, ':'(Module,xx)),
'$lgt_runtime_normalized_error_handler'(error(existence_error(procedure, PI), Context)).
'$lgt_runtime_normalized_error_handler'(error(existence_error(procedure, TFunctor/6), _)) :-
( atom_concat(Prefix, '_idcl', TFunctor) ->
true
; atom_concat(Prefix, '_dcl', TFunctor)
),
'$lgt_prefix_to_entity'(Prefix, Obj),
( '$lgt_instantiates_class_'(_, Obj, _)
; '$lgt_specializes_class_'(_, Obj, _)
; '$lgt_extends_object_'(_, Obj, _)
; '$lgt_complemented_object_'(Obj, _, _, _, _)
),
\+ '$lgt_current_object_'(Obj, _, _, _, _, _, _, _, _, _, _),
throw(error(existence_error(object, Obj), logtalk(_, _))).
'$lgt_runtime_normalized_error_handler'(error(existence_error(procedure, TFunctor/5), _)) :-
atom_concat(Prefix, '_dcl', TFunctor),
'$lgt_prefix_to_entity'(Prefix, CtgOrPtc),
( '$lgt_implements_protocol_'(_, CtgOrPtc, _), \+ '$lgt_current_protocol_'(CtgOrPtc, _, _, _, _),
throw(error(existence_error(protocol, CtgOrPtc), logtalk(_, _)))
; '$lgt_extends_protocol_'(_, CtgOrPtc, _), \+ '$lgt_current_protocol_'(CtgOrPtc, _, _, _, _),
throw(error(existence_error(protocol, CtgOrPtc), logtalk(_, _)))
; '$lgt_imports_category_'(_, CtgOrPtc, _), \+ '$lgt_current_category_'(CtgOrPtc, _, _, _, _, _),
throw(error(existence_error(category, CtgOrPtc), logtalk(_, _)))
; '$lgt_extends_category_'(_, CtgOrPtc, _), \+ '$lgt_current_category_'(CtgOrPtc, _, _, _, _, _),
throw(error(existence_error(category, CtgOrPtc), logtalk(_, _)))
).
'$lgt_runtime_normalized_error_handler'(error(existence_error(procedure, TFunctor/TArity), logtalk(Goal, Entity))) :-
'$lgt_decompile_predicate_indicators'(TFunctor/TArity, _, _, Functor/Arity),
throw(error(existence_error(procedure, Functor/Arity), logtalk(Goal, Entity))).
'$lgt_runtime_normalized_error_handler'(error(existence_error(procedure, TFunctor/TArity), _)) :-
'$lgt_decompile_predicate_indicators'(TFunctor/TArity, Entity, _, Functor/Arity),
functor(Goal, Functor, Arity),
throw(error(existence_error(procedure, Functor/Arity), logtalk(Goal, Entity))).
'$lgt_runtime_normalized_error_handler'(Error) :-
throw(Error).
'$lgt_runtime_thread_error_handler_helper'(logtalk(threaded_exit(TGoal),This), logtalk(threaded_exit(Goal),This)) :-
'$lgt_runtime_thread_error_tgoal_goal'(TGoal, Goal).
'$lgt_runtime_thread_error_handler_helper'(logtalk(threaded_exit(TGoal,Tag),This), logtalk(threaded_exit(Goal,Tag),This)) :-
'$lgt_runtime_thread_error_tgoal_goal'(TGoal, Goal).
'$lgt_runtime_thread_error_handler_helper'(Context, Context).
'$lgt_runtime_thread_error_tgoal_goal'('$lgt_send_to_obj_ne_nv'(Self,Goal0,_), Goal) :-
( Self == user ->
Goal = Goal0
; Goal = Self::Goal0
).
'$lgt_runtime_thread_error_tgoal_goal'('$lgt_send_to_obj_nv'(Self,Goal0,_), Goal) :-
( Self == user ->
Goal = Goal0
; Goal = Self::Goal0
).
'$lgt_runtime_thread_error_tgoal_goal'(TGoal, Goal) :-
functor(TGoal, TFunctor, TArity),
'$lgt_decompile_predicate_indicators'(TFunctor/TArity, _, _, Functor/Arity),
functor(Goal, Functor, Arity),
'$lgt_unify_head_thead_arguments'(Goal, TGoal, _).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% built-in predicates
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% current_object(?object_identifier)
current_object(Obj) :-
'$lgt_check'(var_or_object_identifier, Obj, logtalk(current_object(Obj), _)),
'$lgt_current_object_'(Obj, _, _, _, _, _, _, _, _, _, _).
% current_protocol(?protocol_identifier)
current_protocol(Ptc) :-
'$lgt_check'(var_or_protocol_identifier, Ptc, logtalk(current_protocol(Ptc), _)),
'$lgt_current_protocol_'(Ptc, _, _, _, _).
% current_category(?category_identifier)
current_category(Ctg) :-
'$lgt_check'(var_or_category_identifier, Ctg, logtalk(current_category(Ctg), _)),
'$lgt_current_category_'(Ctg, _, _, _, _, _).
% object_property(?object_identifier, ?object_property)
%
% the implementation ensures that no spurious choice-points are
% created when the predicate is called with a bound property argument
object_property(Obj, Prop) :-
'$lgt_check'(var_or_object_identifier, Obj, logtalk(object_property(Obj, Prop), _)),
'$lgt_check'(var_or_object_property, Prop, logtalk(object_property(Obj, Prop), _)),
'$lgt_current_object_'(Obj, _, Dcl, Def, _, _, _, DDcl, DDef, Rnm, Flags),
'$lgt_object_property'(Prop, Obj, Dcl, Def, DDcl, DDef, Rnm, Flags).
'$lgt_object_property'(debugging, _, _, _, _, _, _, Flags) :-
Flags /\ 512 =:= 512.
'$lgt_object_property'(context_switching_calls, _, _, _, _, _, _, Flags) :-
Flags /\ 256 =:= 256.
'$lgt_object_property'(dynamic_declarations, _, _, _, _, _, _, Flags) :-
Flags /\ 128 =:= 128.
'$lgt_object_property'(complements(Complements), _, _, _, _, _, _, Flags) :-
( Flags /\ 64 =:= 64 ->
Complements = allow
; Flags /\ 32 =:= 32,
Complements = restrict
).
'$lgt_object_property'(complements, _, _, _, _, _, _, Flags) :-
% deprecated Logtalk 2.x object property
( Flags /\ 64 =:= 64 ->
true
; Flags /\ 32 =:= 32
).
'$lgt_object_property'(events, _, _, _, _, _, _, Flags) :-
Flags /\ 16 =:= 16.
'$lgt_object_property'(source_data, _, _, _, _, _, _, Flags) :-
Flags /\ 8 =:= 8.
'$lgt_object_property'(threaded, _, _, _, _, _, _, Flags) :-
Flags /\ 4 =:= 4.
'$lgt_object_property'((dynamic), _, _, _, _, _, _, Flags) :-
Flags /\ 2 =:= 2.
'$lgt_object_property'(static, _, _, _, _, _, _, Flags) :-
Flags /\ 2 =:= 0.
'$lgt_object_property'(built_in, _, _, _, _, _, _, Flags) :-
Flags /\ 1 =:= 1.
'$lgt_object_property'(file(Path), Obj, _, _, _, _, _, _) :-
( '$lgt_entity_property_'(Obj, file_lines(Basename, Directory, _, _)) ->
atom_concat(Directory, Basename, Path)
; fail
).
'$lgt_object_property'(file(Basename, Directory), Obj, _, _, _, _, _, _) :-
( '$lgt_entity_property_'(Obj, file_lines(Basename, Directory, _, _)) ->
true
; fail
).
'$lgt_object_property'(lines(Start, End), Obj, _, _, _, _, _, _) :-
( '$lgt_entity_property_'(Obj, file_lines(_, _, Start, End)) ->
true
; fail
).
'$lgt_object_property'(info(Info), Obj, _, _, _, _, _, _) :-
( '$lgt_entity_property_'(Obj, info(Info)) ->
true
; fail
).
'$lgt_object_property'(public(Resources), Obj, Dcl, _, DDcl, _, _, Flags) :-
'$lgt_object_property_resources'(Obj, Dcl, DDcl, Flags, p(p(p)), Resources).
'$lgt_object_property'(protected(Resources), Obj, Dcl, _, DDcl, _, _, Flags) :-
'$lgt_object_property_resources'(Obj, Dcl, DDcl, Flags, p(p), Resources).
'$lgt_object_property'(private(Resources), Obj, Dcl, _, DDcl, _, _, Flags) :-
'$lgt_object_property_resources'(Obj, Dcl, DDcl, Flags, p, Resources).
'$lgt_object_property'(declares(Predicate, Properties), Obj, Dcl, _, DDcl, _, _, Flags) :-
'$lgt_object_property_declares'(Obj, Dcl, DDcl, Flags, Predicate, Properties).
'$lgt_object_property'(defines(Predicate, Properties), Obj, _, Def, _, DDef, _, _) :-
'$lgt_object_property_defines'(Obj, Def, DDef, Predicate, Properties).
'$lgt_object_property'(includes(Predicate, From, Properties), Obj, _, _, _, _, _, _) :-
'$lgt_entity_property_includes'(Obj, Predicate, From, Properties).
'$lgt_object_property'(provides(Predicate, To, Properties), Obj, _, _, _, _, _, _) :-
'$lgt_entity_property_provides'(Obj, Predicate, To, Properties).
'$lgt_object_property'(alias(Alias, Properties), Obj, _, _, _, _, Rnm, Flags) :-
'$lgt_entity_property_alias'(Obj, Rnm, Flags, Alias, Properties).
'$lgt_object_property'(calls(Predicate, Properties), Obj, _, _, _, _, _, _) :-
'$lgt_entity_property_calls'(Obj, Predicate, Properties).
'$lgt_object_property'(updates(Predicate, Properties), Obj, _, _, _, _, _, _) :-
'$lgt_entity_property_updates'(Obj, Predicate, Properties).
'$lgt_object_property'(number_of_clauses(Total), Obj, _, _, _, _, _, _) :-
( '$lgt_entity_property_'(Obj, number_of_clauses(Total, _)) ->
true
; fail
).
'$lgt_object_property'(number_of_rules(Total), Obj, _, _, _, _, _, _) :-
( '$lgt_entity_property_'(Obj, number_of_rules(Total, _)) ->
true
; fail
).
'$lgt_object_property'(number_of_user_clauses(TotalUser), Obj, _, _, _, _, _, _) :-
( '$lgt_entity_property_'(Obj, number_of_clauses(_, TotalUser)) ->
true
; fail
).
'$lgt_object_property'(number_of_user_rules(TotalUser), Obj, _, _, _, _, _, _) :-
( '$lgt_entity_property_'(Obj, number_of_rules(_, TotalUser)) ->
true
; fail
).
'$lgt_object_property_resources'(Obj, Dcl, DDcl, Flags, Scope, Resources) :-
% the caller uses this predicate to group object resources by scope
findall(
Resource,
'$lgt_object_property_resource'(Obj, Dcl, DDcl, Flags, Scope, Resource),
Resources
).
'$lgt_object_property_resource'(_, Dcl, _, _, Scope, Functor/Arity) :-
call(Dcl, Predicate, Scope, _, _),
functor(Predicate, Functor, Arity).
'$lgt_object_property_resource'(_, _, DDcl, Flags, Scope, Functor/Arity) :-
Flags /\ 128 =:= 128,
% dynamic predicate declarations are allowed
call(DDcl, Predicate, Scope),
functor(Predicate, Functor, Arity).
'$lgt_object_property_resource'(Obj, _, _, _, Scope, op(Priority, Specifier, Operator)) :-
'$lgt_entity_property_'(Obj, op(Priority, Specifier, Operator, Scope)).
% category_property(?category_identifier, ?category_property)
%
% the implementation ensures that no spurious choice-points are
% created when the predicate is called with a bound property argument
category_property(Ctg, Prop) :-
'$lgt_check'(var_or_category_identifier, Ctg, logtalk(category_property(Ctg, Prop), _)),
'$lgt_check'(var_or_category_property, Prop, logtalk(category_property(Ctg, Prop), _)),
'$lgt_current_category_'(Ctg, _, Dcl, Def, Rnm, Flags),
'$lgt_category_property'(Prop, Ctg, Dcl, Def, Rnm, Flags).
'$lgt_category_property'(debugging, _, _, _, _, Flags) :-
Flags /\ 512 =:= 512.
'$lgt_category_property'(events, _, _, _, _, Flags) :-
Flags /\ 16 =:= 16.
'$lgt_category_property'(source_data, _, _, _, _, Flags) :-
Flags /\ 8 =:= 8.
'$lgt_category_property'((dynamic), _, _, _, _, Flags) :-
Flags /\ 2 =:= 2.
'$lgt_category_property'(static, _, _, _, _, Flags) :-
Flags /\ 2 =:= 0.
'$lgt_category_property'(built_in, _, _, _, _, Flags) :-
Flags /\ 1 =:= 1.
'$lgt_category_property'(file(Path), Ctg, _, _, _, _) :-
( '$lgt_entity_property_'(Ctg, file_lines(Basename, Directory, _, _)) ->
atom_concat(Directory, Basename, Path)
; fail
).
'$lgt_category_property'(file(Basename, Directory), Ctg, _, _, _, _) :-
( '$lgt_entity_property_'(Ctg, file_lines(Basename, Directory, _, _)) ->
true
; fail
).
'$lgt_category_property'(lines(Start, End), Ctg, _, _, _, _) :-
( '$lgt_entity_property_'(Ctg, file_lines(_, _, Start, End)) ->
true
; fail
).
'$lgt_category_property'(info(Info), Ctg, _, _, _, _) :-
( '$lgt_entity_property_'(Ctg, info(Info)) ->
true
; fail
).
'$lgt_category_property'(public(Resources), Ctg, Dcl, _, _, Flags) :-
'$lgt_category_property_resources'(Ctg, Dcl, Flags, p(p(p)), Resources).
'$lgt_category_property'(protected(Resources), Ctg, Dcl, _, _, Flags) :-
'$lgt_category_property_resources'(Ctg, Dcl, Flags, p(p), Resources).
'$lgt_category_property'(private(Resources), Ctg, Dcl, _, _, Flags) :-
'$lgt_category_property_resources'(Ctg, Dcl, Flags, p, Resources).
'$lgt_category_property'(declares(Predicate, Properties), Ctg, Dcl, _, _, _) :-
'$lgt_category_property_declares'(Ctg, Dcl, Predicate, Properties).
'$lgt_category_property'(defines(Predicate, Properties), Ctg, _, Def, _, _) :-
'$lgt_category_property_defines'(Ctg, Def, Predicate, Properties).
'$lgt_category_property'(includes(Predicate, From, Properties), Ctg, _, _, _, _) :-
'$lgt_entity_property_includes'(Ctg, Predicate, From, Properties).
'$lgt_category_property'(provides(Predicate, To, Properties), Ctg, _, _, _, _) :-
'$lgt_entity_property_provides'(Ctg, Predicate, To, Properties).
'$lgt_category_property'(calls(Predicate, Properties), Ctg, _, _, _, _) :-
'$lgt_entity_property_calls'(Ctg, Predicate, Properties).
'$lgt_category_property'(updates(Predicate, Properties), Ctg, _, _, _, _) :-
'$lgt_entity_property_updates'(Ctg, Predicate, Properties).
'$lgt_category_property'(alias(Alias, Properties), Ctg, _, _, Rnm, Flags) :-
'$lgt_entity_property_alias'(Ctg, Rnm, Flags, Alias, Properties).
'$lgt_category_property'(number_of_clauses(Total), Ctg, _, _, _, _) :-
( '$lgt_entity_property_'(Ctg, number_of_clauses(Total, _)) ->
true
; fail
).
'$lgt_category_property'(number_of_rules(Total), Ctg, _, _, _, _) :-
( '$lgt_entity_property_'(Ctg, number_of_rules(Total, _)) ->
true
; fail
).
'$lgt_category_property'(number_of_user_clauses(TotalUser), Ctg, _, _, _, _) :-
( '$lgt_entity_property_'(Ctg, number_of_clauses(_, TotalUser)) ->
true
; fail
).
'$lgt_category_property'(number_of_user_rules(TotalUser), Ctg, _, _, _, _) :-
( '$lgt_entity_property_'(Ctg, number_of_rules(_, TotalUser)) ->
true
; fail
).
'$lgt_category_property_resources'(Ctg, Dcl, Flags, Scope, Resources) :-
% the caller uses this predicate to group object resources by scope
findall(
Resource,
'$lgt_category_property_resource'(Ctg, Dcl, Flags, Scope, Resource),
Resources
).
'$lgt_category_property_resource'(Ctg, Dcl, _, Scope, Functor/Arity) :-
call(Dcl, Predicate, Scope, _, _, Ctg),
functor(Predicate, Functor, Arity).
'$lgt_category_property_resource'(Ctg, _, _, Scope, op(Priority, Specifier, Operator)) :-
'$lgt_entity_property_'(Ctg, op(Priority, Specifier, Operator, Scope)).
% protocol_property(?protocol_identifier, ?protocol_property)
%
% the implementation ensures that no spurious choice-points are
% created when the predicate is called with a bound property argument
protocol_property(Ptc, Prop) :-
'$lgt_check'(var_or_protocol_identifier, Ptc, logtalk(protocol_property(Ptc, Prop), _)),
'$lgt_check'(var_or_protocol_property, Prop, logtalk(protocol_property(Ptc, Prop), _)),
'$lgt_current_protocol_'(Ptc, _, Dcl, Rnm, Flags),
'$lgt_protocol_property'(Prop, Ptc, Dcl, Rnm, Flags).
'$lgt_protocol_property'(debugging, _, _, _, Flags) :-
Flags /\ 512 =:= 512.
'$lgt_protocol_property'(source_data, _, _, _, Flags) :-
Flags /\ 8 =:= 8.
'$lgt_protocol_property'((dynamic), _, _, _, Flags) :-
Flags /\ 2 =:= 2.
'$lgt_protocol_property'(static, _, _, _, Flags) :-
Flags /\ 2 =:= 0.
'$lgt_protocol_property'(built_in, _, _, _, Flags) :-
Flags /\ 1 =:= 1.
'$lgt_protocol_property'(file(Path), Ptc, _, _, _) :-
( '$lgt_entity_property_'(Ptc, file_lines(Basename, Directory, _, _)) ->
atom_concat(Directory, Basename, Path)
; fail
).
'$lgt_protocol_property'(file(Basename, Directory), Ptc, _, _, _) :-
( '$lgt_entity_property_'(Ptc, file_lines(Basename, Directory, _, _)) ->
true
; fail
).
'$lgt_protocol_property'(lines(Start, End), Ptc, _, _, _) :-
( '$lgt_entity_property_'(Ptc, file_lines(_, _, Start, End)) ->
true
; fail
).
'$lgt_protocol_property'(info(Info), Ptc, _, _, _) :-
( '$lgt_entity_property_'(Ptc, info(Info)) ->
true
; fail
).
'$lgt_protocol_property'(public(Resources), Ptc, Dcl, _, Flags) :-
'$lgt_protocol_property_resources'(Ptc, Dcl, Flags, p(p(p)), Resources).
'$lgt_protocol_property'(protected(Resources), Ptc, Dcl, _, Flags) :-
'$lgt_protocol_property_resources'(Ptc, Dcl, Flags, p(p), Resources).
'$lgt_protocol_property'(private(Resources), Ptc, Dcl, _, Flags) :-
'$lgt_protocol_property_resources'(Ptc, Dcl, Flags, p, Resources).
'$lgt_protocol_property'(declares(Predicate, Properties), Ptc, Dcl, _, _) :-
'$lgt_protocol_property_declares'(Ptc, Dcl, Predicate, Properties).
'$lgt_protocol_property'(alias(Alias, Properties), Ptc, _, Rnm, Flags) :-
'$lgt_entity_property_alias'(Ptc, Rnm, Flags, Alias, Properties).