public void SaveContextAndUpToNearestDefSect() 
        {
            // _scope_stack вообще не трогать - он не используется !!!!!
            SavedContext = new ContextState();
            SavedContext.stlist_stack = convertion_data_and_alghoritms.statement_list_stack;
            SavedContext.cmn = _cmn;
            SavedContext.ctn = _ctn;
            SavedContext.func_stack = func_stack;
            SavedContext.block_stack = block_stack;
            SavedContext.ShortStringTypes = ShortStringTypes;
            SavedContext.var_defs = var_defs;
            SavedContext.var_defs_stack = var_defs_stack;
            SavedContext.special_local_vars = _special_local_vars;
            SavedContext.possible_incorrect_instances = possible_incorrect_instances;
            SavedContext.skip_check_where_sections = skip_check_where_sections;
            SavedContext.main_procedure = main_procedure;
            SavedContext.allow_inherited_ctor_call = allow_inherited_ctor_call;
            SavedContext.is_order_independed_method_description = is_order_independed_method_description;
            SavedContext.ctt = _ctt;
            SavedContext.compiled_tn = _compiled_tn;
            SavedContext.last_created_function = last_created_function;
            SavedContext.cycles_stack = _cycles_stack;
            SavedContext.num_of_for_cycles = num_of_for_cycles;
            SavedContext._fal = _fal;
            SavedContext.member_decls = member_decls;
            SavedContext.types_predefined = _types_predefined;
            SavedContext.ret_value = syntax_tree_visitor.ret.get_result();

            SavedContextStack.Push(SavedContext);
            // SavedContext.type_stack = type_stack;

            convertion_data_and_alghoritms.statement_list_stack = new statement_list_stack();
            //_cmn = null;
            //_ctn = null;
            //func_stack = new common_function_node_stack();
            //block_stack = new Stack<code_block>();
            ShortStringTypes = new Dictionary<int,short_string_type_node>();
            //var_defs = new List<var_definition_node>();
            //var_defs_stack = new Stack<List<var_definition_node>>();
            _special_local_vars = new List<local_variable>();
            possible_incorrect_instances = new List<type_instance_and_location>();
            skip_check_where_sections = false;
            main_procedure = null;
            allow_inherited_ctor_call = false;
            is_order_independed_method_description = false;
            _ctt = null;
            _compiled_tn = null;
		    last_created_function = null;
    	    _cycles_stack = new statement_node_stack();
            _num_of_for_cycles = 0;
            _fal = SemanticTree.field_access_level.fal_private;
            member_decls = new Hashtable();
            _types_predefined = new List<common_type_node>();
            syntax_tree_visitor.ret.return_value(null);
            // _type_stack = new Stack<common_type_node>(); 

        }
 public void reset()
 {
     _cmn = null;
     _ctn = null;
     _func_stack.clear();
     var_defs.Clear();
     _main_procedure = null;
     _last_created_function = null;
     _cycles_stack.clear();
     _num_of_for_cycles = 0;
     _fal = SemanticTree.field_access_level.fal_private;
     rec_num = 1;
     var_defs_stack.Clear();
     type_stack.Clear();
     clear_special_local_vars();
     _scope_stack.Clear();
     TypedFiles.Clear();
     ShortStringTypes.Clear();
     TypedSets.Clear();
     _compiled_tn = null;
     _explicit_interface_type = null;
     _ctt = null;
     allow_inherited_ctor_call = false;
     _types_predefined.Clear();
     _block_stack.Clear();
     member_decls.Clear();
     possible_incorrect_instances.Clear();
     skip_check_where_sections = false;
     LambdaHelper.Reset(); //lroman//
     SavedContext = null;
     SavedContextStack.Clear();
     compiled_tc_cache.Clear();
     extension_method = false;
     _last_created_function = null;
     in_parameters_block = false;
     is_order_independed_method_description = false;
     
 }
        public void RestoreCurrentContext()
        {
            SavedContext = SavedContextStack.Pop();
            convertion_data_and_alghoritms.statement_list_stack = SavedContext.stlist_stack;
            _cmn = SavedContext.cmn;
            _ctn = SavedContext.ctn;
            func_stack = SavedContext.func_stack;
            block_stack = SavedContext.block_stack;
            ShortStringTypes = SavedContext.ShortStringTypes;
            var_defs = SavedContext.var_defs;
            var_defs_stack = SavedContext.var_defs_stack;
            _special_local_vars = SavedContext.special_local_vars;
            possible_incorrect_instances = SavedContext.possible_incorrect_instances;
            skip_check_where_sections = SavedContext.skip_check_where_sections;
            main_procedure = SavedContext.main_procedure;
            allow_inherited_ctor_call = SavedContext.allow_inherited_ctor_call;
            is_order_independed_method_description = SavedContext.is_order_independed_method_description;
            _ctt = SavedContext.ctt;
            _compiled_tn = SavedContext.compiled_tn;
            last_created_function = SavedContext.last_created_function;
            _cycles_stack = SavedContext.cycles_stack;
            _num_of_for_cycles = SavedContext.num_of_for_cycles;
            _fal = SavedContext._fal;
            member_decls = SavedContext.member_decls;
            _types_predefined = SavedContext.types_predefined;
            syntax_tree_visitor.ret.return_value(SavedContext.ret_value);

            if (SavedContextStack.Count == 0)
                SavedContext = null;
            // type_stack = cs.type_stack; оно почему-то readonly - ну и ладно
        }