3240593d2e
Исправлена ошибка for step Дополнена справка по for step и foreach index J,yjdkty ntrcnjdsq htlfrnjh? gjlcdtxbdf.obq ыеуз b штвуч rjyntrcnyj d hfvrf[ jlyjq cnhjrb
528 lines
28 KiB
C#
528 lines
28 KiB
C#
using PascalABCCompiler.SemanticTree;
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using PascalABCCompiler.SyntaxTree;
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using PascalABCCompiler.SystemLibrary;
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using PascalABCCompiler.TreeRealization;
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using SymTable = SymbolTable;
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namespace PascalABCCompiler.TreeConverter
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{
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public partial class syntax_tree_visitor
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{
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public bool internal_is_assign;
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public override void visit(assign _assign)
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{
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var loc = get_location(_assign);
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addressed_expression to;
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expression_node from;
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AssignCheckAndConvert(_assign, out to, out from);
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InferLambdaResultTypeFromAssignment(_assign, from, to);
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if (ProcessAssignToPropertyIfPossible(_assign, to, loc, from))
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return;
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if (ProcessAssignmentToEventIfPossible(_assign, to, from, loc))
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return;
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if (ProcessAssignmentToShortStringIfPossible(_assign, to, from, loc))
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return;
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assign_is_converting = true;
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if (to.type.type_special_kind == type_special_kind.set_type && from.type.type_special_kind == type_special_kind.set_type && // SSM 12/07/19 fix #1795
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convertion_data_and_alghoritms.is_value_int_type(to.type.element_type) &&
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convertion_data_and_alghoritms.is_value_real_type(from.type.element_type))
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AddError(new CanNotConvertTypes(from, from.type, to.type, from.location));
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statement_node en = find_operator(_assign.operator_type, to, from, get_location(_assign));
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assign_is_converting = false;
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return_value(en);
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}
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/// <summary>
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/// Выводит тип результата лямбды по первому присваиванию переменной Result.
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/// </summary>
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private void InferLambdaResultTypeFromAssignment(assign _assign, expression_node from, addressed_expression to)
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{
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if (stflambda.Count > 0) // мы находимся внутри лямбды - возможно, вложенной
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{
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var fld = stflambda.Peek();
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if (_assign.to is ident && (_assign.to as ident).name.ToLower() == "result" && fld.RealSemTypeOfResExpr == null)
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// если это - первое присваивание Result
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{
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fld.RealSemTypeOfResExpr = from.type;
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fld.RealSemTypeOfResult = to.type;
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}
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}
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}
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/// <summary>
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/// Обрабатывает случай, когда левая часть присваивания short string.
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/// </summary>
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/// <returns>True - обработка прошла, иначе False.</returns>
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private bool ProcessAssignmentToShortStringIfPossible(assign _assign, addressed_expression to, expression_node from, location loc)
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{
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if (_assign.operator_type == Operators.Assignment)
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{
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if (to is simple_array_indexing &&
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(to as simple_array_indexing).simple_arr_expr.type.type_special_kind == type_special_kind.short_string)
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{
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expression_node expr = (to as simple_array_indexing).simple_arr_expr;
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expression_node ind_expr = (to as simple_array_indexing).ind_expr;
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from = convertion_data_and_alghoritms.convert_type(from, SystemLibrary.SystemLibrary.char_type);
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ind_expr = convertion_data_and_alghoritms.create_simple_function_call(
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SystemLibInitializer.SetCharInShortStringProcedure.sym_info as function_node,
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loc,
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expr,
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ind_expr,
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new int_const_node((expr.type as short_string_type_node).Length, null), from);
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return_value(find_operator(compiler_string_consts.assign_name, expr, ind_expr, get_location(_assign)));
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return true;
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}
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if (to.type.type_special_kind == type_special_kind.short_string)
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{
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if (from.type is null_type_node)
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AddError(get_location(_assign), "NIL_WITH_VALUE_TYPES_NOT_ALLOWED");
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expression_node clip_expr = convertion_data_and_alghoritms.create_simple_function_call(
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SystemLibInitializer.ClipShortStringProcedure.sym_info as function_node,
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loc,
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convertion_data_and_alghoritms.convert_type(from, SystemLibrary.SystemLibrary.string_type),
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new int_const_node((to.type as short_string_type_node).Length,
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null));
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statement_node en = find_operator(compiler_string_consts.assign_name, to, clip_expr, get_location(_assign));
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return_value(en);
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return true;
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}
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}
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return false;
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}
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/// <summary>
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/// Преобразует в семантическое представление поля to и from, проводя семантические проверки.
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/// </summary>
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private void AssignCheckAndConvert(assign _assign, out addressed_expression to, out expression_node from)
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{
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internal_is_assign = true;
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to = convert_address_strong(_assign.to);
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internal_is_assign = false;
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if (to == null)
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AddError(get_location(_assign.to), "CAN_NOT_ASSIGN_TO_LEFT_PART");
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//(ssyy) Вставляю проверки прямо сюда, т.к. запарился вылавливать другие случаи.
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bool flag;
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general_node_type node_type;
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if (convertion_data_and_alghoritms.check_for_constant_or_readonly(to, out flag, out node_type))
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{
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if (flag)
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AddError(to.location, "CAN_NOT_ASSIGN_TO_CONSTANT_OBJECT");
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else
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AddError(new CanNotAssignToReadOnlyElement(to.location, node_type));
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}
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// SSM исправление Саушкина 10.03.16
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var fromAsLambda = _assign.from as function_lambda_definition;
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if (fromAsLambda != null)
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{
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#region Вывод параметров лямбда-выражения
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LambdaHelper.InferTypesFromVarStmt(to.type, fromAsLambda, this, _assign.operator_type); //lroman//
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#endregion
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var lambdaVisitMode = fromAsLambda.lambda_visit_mode;
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fromAsLambda.lambda_visit_mode = LambdaVisitMode.VisitForAdvancedMethodCallProcessing;
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from = convert_strong(_assign.from);
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fromAsLambda.lambda_visit_mode = lambdaVisitMode;
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}
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else
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{
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from = convert_strong(_assign.from);
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ProcessAssigntToAutoType(to, ref from);
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}
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// end
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//SSM 4.04.16
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if (to.type is undefined_type)
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to.type = from.type;
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location loc = get_location(_assign);
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if (to is class_field_reference)
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{
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var classFieldRef = to as class_field_reference;
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if (classFieldRef.obj.type.type_special_kind == type_special_kind.record &&
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classFieldRef.obj is base_function_call)
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{
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//исключим ситуацию обращения к массиву
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if (!(classFieldRef.obj is common_method_call &&
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(classFieldRef.obj as common_method_call).obj.type.type_special_kind ==
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type_special_kind.array_wrapper))
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AddError(loc, "LEFT_SIDE_CANNOT_BE_ASSIGNED_TO");
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}
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//else check_field_reference_for_assign(to as class_field_reference,loc);
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}
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if (context.is_in_cycle() && !SemanticRules.AllowChangeLoopVariable)
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{
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var_definition_node toAsVariable = GetLocalVariableFromAdressExpressionIfPossible(to);
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if (toAsVariable != null && context.is_loop_variable(toAsVariable) && _assign.source_context != null) // последнее - обрезает проверку для сгенерированного i += 1 в foreach ... index i
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AddError(to.location, "CANNOT_ASSIGN_TO_LOOP_VARIABLE");
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}
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{
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var classFieldRef = (to as simple_array_indexing)?.simple_arr_expr as class_field_reference;
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if (classFieldRef?.obj is constant_node)
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AddError(loc, "LEFT_SIDE_CANNOT_BE_ASSIGNED_TO");
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}
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}
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/// <summary>
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/// Автовыведение типов в yield'ax.
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/// </summary>
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private void ProcessAssigntToAutoType(addressed_expression to, ref expression_node from)
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{
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var sequence = to.type as compiled_generic_instance_type_node;
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// SSM 26.06.16 - правка в связи с автовыведением типов в yieldах
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if (to.type is auto_type)
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{
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try_convert_typed_expression_to_function_call(ref from);
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if (to is class_field_reference)
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{
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var cfr = to as class_field_reference;
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if (from is typed_expression) // SSM 22.12.18 syntax_tree_visitor.cs 16066 - взял оттуда
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{
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base_function_call bfc = ((from as typed_expression).type as delegated_methods).proper_methods[0];
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/*if (bfc.function.is_generic_function && _var_def_statement.vars_type == null)
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{
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AddError(inital_value.location, "CAN_NOT_DEDUCE_TYPE_{0}", null);
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}
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foreach (parameter p in bfc.simple_function_node.parameters)
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{
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if (p.type.is_generic_parameter)
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AddError(inital_value.location, "USE_ANONYMOUS_FUNCTION_TYPE_WITH_GENERICS");
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} */
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common_type_node del =
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convertion_data_and_alghoritms.type_constructor.create_delegate(context.get_delegate_type_name(), bfc.simple_function_node.return_value_type, bfc.simple_function_node.parameters, context.converted_namespace, null);
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context.converted_namespace.types.AddElement(del); //- сомневаюсь - контекст уже поменялся!
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//tn = del;
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from = convertion_data_and_alghoritms.explicit_convert_type(from, del);
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from.type = del;
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}
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cfr.field.type = from.type;
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cfr.type = from.type; // Это неверно работает когда yieldится процедура #1439
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// SSM 1.11.18 попытка правки возвращения процедуры в yield
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//if (from.type.semantic_node_type == semantic_node_type.delegated_method)
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//cfr.type.semantic_node_type = semantic_node_type.delegated_method;
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cfr.field.inital_value = context.GetInitalValueForVariable(cfr.field, cfr.field.inital_value);
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}
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else if (to is local_block_variable_reference)
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{
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var lvr = to as local_block_variable_reference;
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lvr.var.type = from.type;
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lvr.type = from.type;
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lvr.var.inital_value = context.GetInitalValueForVariable(lvr.var, lvr.var.inital_value);
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}
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else AddError(to.location, "Не могу вывести тип при наличии yield: " + to.type.full_name);
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//to.type = from.type; // и без всякого real_type!
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}
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else if (sequence?.instance_params[0] is ienumerable_auto_type)
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{
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type_node elem_type = null;
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try_convert_typed_expression_to_function_call(ref from);
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bool bb; // здесь bb не нужно. Оно нужно в foreach
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var b = FindIEnumerableElementType(from.type, ref elem_type, out bb);
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if (!b)
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AddError(from.location, "CAN_NOT_EXECUTE_FOREACH_BY_EXPR_OF_TYPE_{0}", from.type.full_name);
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var IEnumType = new template_type_reference(new named_type_reference("System.Collections.Generic.IEnumerable"),
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new template_param_list(new semantic_type_node(elem_type)));
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if (to is class_field_reference)
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{
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var cfr = to as class_field_reference;
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cfr.field.type = convert_strong(IEnumType);
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cfr.type = cfr.field.type;
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}
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else if (to is local_block_variable_reference)
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{
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var lvr = to as local_block_variable_reference;
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lvr.var.type = convert_strong(IEnumType); // замена типа у описания переменной
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lvr.type = lvr.var.type; // замена типа у переменной
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}
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}
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}
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/// <summary>
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/// Обрабатывает случай, когда левая часть присваивания свойство.
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/// </summary>
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/// <returns>True - обработка прошла, иначе False.</returns>
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private bool ProcessAssignToPropertyIfPossible(assign _assign, addressed_expression to, location loc,
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expression_node from)
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{
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//проверка на обращение к полю записи возвращенной из функции с целью присваивания
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//нужно чтобы пользователь не мог менять временный обьект
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if (to.semantic_node_type == semantic_node_type.static_property_reference ||
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to.semantic_node_type == semantic_node_type.non_static_property_reference)
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{
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property_node pn;
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if (to.semantic_node_type == semantic_node_type.static_property_reference)
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pn = (to as static_property_reference).property;
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else
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pn = (to as non_static_property_reference).property;
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var ot = MapCompositeAssignmentOperatorToSameBinaryOperator(_assign);
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var oper_ass_in_prop = ot != Operators.Undefined;
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if (_assign.operator_type == Operators.Assignment || oper_ass_in_prop)
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{
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if (oper_ass_in_prop)
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{
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if (pn.get_function == null)
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AddError(loc, "THIS_PROPERTY_{0}_CAN_NOT_BE_READED", pn.name);
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base_function_call prop_expr;
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if (to.semantic_node_type == semantic_node_type.non_static_property_reference)
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{
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prop_expr = create_not_static_method_call(pn.get_function,
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(to as non_static_property_reference).expression, loc, false);
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prop_expr.parameters.AddRange((to as non_static_property_reference).fact_parametres);
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}
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else
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{
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prop_expr = create_static_method_call(pn.get_function, loc, pn.comprehensive_type, false);
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prop_expr.parameters.AddRange((to as static_property_reference).fact_parametres);
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}
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from = find_operator(ot, prop_expr, from, loc);
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}
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if (to.semantic_node_type == semantic_node_type.static_property_reference)
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{
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static_property_reference spr = (static_property_reference) to;
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if (spr.property.set_function == null)
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{
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AddError(loc, "THIS_PROPERTY_{0}_CAN_NOT_BE_WRITED", spr.property.name);
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}
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check_property_params(spr, loc);
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function_node set_func = spr.property.set_function;
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if (from.type is delegated_methods && !spr.property.property_type.IsDelegate)
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from = convert_if_typed_expression_to_function_call(from, true);
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from = convertion_data_and_alghoritms.convert_type(from, spr.property.property_type);
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spr.fact_parametres.AddElement(from);
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base_function_call bfc = create_static_method_call(set_func, loc,
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spr.property.comprehensive_type,
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true);
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bfc.parameters.AddRange(spr.fact_parametres);
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return_value((statement_node) bfc);
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}
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else if (to.semantic_node_type == semantic_node_type.non_static_property_reference)
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{
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non_static_property_reference nspr = (non_static_property_reference) to;
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check_property_params(nspr, loc);
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if (from.type is delegated_methods && !nspr.property.property_type.IsDelegate)
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from = convert_if_typed_expression_to_function_call(from, true);
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from = convertion_data_and_alghoritms.convert_type(from, nspr.property.property_type);
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nspr.fact_parametres.AddElement(from);
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//Обработка s[i]:='c'
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if (SystemUnitAssigned)
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if (nspr.property.comprehensive_type == SystemLibrary.SystemLibrary.string_type)
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{
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if (nspr.property == SystemLibrary.SystemLibrary.string_type.default_property_node)
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{
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if (SystemLibInitializer.StringDefaultPropertySetProcedure != null)
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{
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expressions_list exl = new expressions_list();
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exl.AddElement(nspr.expression);
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exl.AddElement(nspr.fact_parametres[0]);
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exl.AddElement(from);
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function_node fn = convertion_data_and_alghoritms.select_function(exl,
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SystemLibInitializer.StringDefaultPropertySetProcedure
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.SymbolInfo, loc);
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expression_node ret =
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convertion_data_and_alghoritms.create_simple_function_call(fn, loc,
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exl.ToArray());
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return_value((statement_node) ret);
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return true;
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}
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}
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}
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if (nspr.property.set_function == null)
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{
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AddError(loc, "THIS_PROPERTY_{0}_CAN_NOT_BE_WRITED", nspr.property.name);
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}
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function_node set_func = nspr.property.set_function;
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base_function_call bfc = create_not_static_method_call(set_func, nspr.expression, loc,
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true);
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bfc.parameters.AddRange(nspr.fact_parametres);
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return_value((statement_node) bfc);
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}
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return true;
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}
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}
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return false;
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}
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/// <summary>
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/// Если addressedExpression это ссылка на переменную, то возвращает узел этой переменной.
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/// Например, для namespace_variable_reference вернёт (addressedExpression as namespace_variable_reference).var
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/// </summary>
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/// <returns>Возвращает узел этой переменной, иначе null</returns>
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private static var_definition_node GetLocalVariableFromAdressExpressionIfPossible(addressed_expression addressedExpression)
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{
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switch (addressedExpression.semantic_node_type)
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{
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case semantic_node_type.namespace_variable_reference:
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return (addressedExpression as namespace_variable_reference).var;
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case semantic_node_type.local_variable_reference:
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return (addressedExpression as local_variable_reference).var;
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case semantic_node_type.local_block_variable_reference:
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return (addressedExpression as local_block_variable_reference).var;
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default:
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return null;
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}
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}
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/// <summary>
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/// Сопоставляет составному присваиванию его аналог.
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/// Оператору '+=' возвращает '+', для '-=' возвращает '-', и т.д.
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/// </summary>
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/// <returns>Возвращает оператор. Если было передано не присваивание возвращает Operators.Undefined</returns>
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private static Operators MapCompositeAssignmentOperatorToSameBinaryOperator(assign _assign)
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{
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switch (_assign.operator_type)
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{
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case Operators.AssignmentAddition:
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return Operators.Plus;
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case Operators.AssignmentBitwiseAND:
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return Operators.BitwiseAND;
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case Operators.AssignmentBitwiseLeftShift:
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return Operators.BitwiseLeftShift;
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case Operators.AssignmentBitwiseOR:
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return Operators.BitwiseOR;
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case Operators.AssignmentBitwiseRightShift:
|
||
return Operators.BitwiseRightShift;
|
||
case Operators.AssignmentBitwiseXOR:
|
||
return Operators.BitwiseXOR;
|
||
case Operators.AssignmentDivision:
|
||
return Operators.Division;
|
||
case Operators.AssignmentModulus:
|
||
return Operators.ModulusRemainder;
|
||
case Operators.AssignmentMultiplication:
|
||
return Operators.Multiplication;
|
||
case Operators.AssignmentSubtraction:
|
||
return Operators.Minus;
|
||
default:
|
||
return Operators.Undefined;
|
||
}
|
||
}
|
||
|
||
|
||
|
||
/// <summary>
|
||
/// Обрабатывает случай, когда левая часть присваивания имеет тип event.
|
||
/// </summary>
|
||
/// <returns>True - обработка прошла, иначе False.</returns>
|
||
private bool ProcessAssignmentToEventIfPossible(assign _assign, addressed_expression to, expression_node from,
|
||
location loc)
|
||
{
|
||
if ((to.semantic_node_type == semantic_node_type.static_event_reference)
|
||
|| (to.semantic_node_type == semantic_node_type.nonstatic_event_reference))
|
||
{
|
||
statement_node event_assign = null;
|
||
static_event_reference ser = (static_event_reference) to;
|
||
expression_node right_del = convertion_data_and_alghoritms.convert_type(from, ser.en.delegate_type);
|
||
switch (_assign.operator_type)
|
||
{
|
||
case Operators.AssignmentAddition:
|
||
{
|
||
if (to.semantic_node_type == semantic_node_type.static_event_reference)
|
||
{
|
||
event_assign = convertion_data_and_alghoritms.create_simple_function_call(
|
||
ser.en.add_method, loc, right_del);
|
||
}
|
||
else
|
||
{
|
||
if (ser.en.semantic_node_type == semantic_node_type.compiled_event)
|
||
{
|
||
nonstatic_event_reference nser = (nonstatic_event_reference) ser;
|
||
compiled_function_node cfn = (compiled_function_node) ser.en.add_method;
|
||
compiled_function_call tmp_event_assign = new compiled_function_call(cfn, nser.obj, loc);
|
||
tmp_event_assign.parameters.AddElement(right_del);
|
||
event_assign = tmp_event_assign;
|
||
}
|
||
else if (ser.en.semantic_node_type == semantic_node_type.common_event)
|
||
{
|
||
nonstatic_event_reference nser = (nonstatic_event_reference) ser;
|
||
common_method_node cfn = (common_method_node) ser.en.add_method;
|
||
common_method_call tmp_event_assign = new common_method_call(cfn, nser.obj, loc);
|
||
tmp_event_assign.parameters.AddElement(right_del);
|
||
event_assign = tmp_event_assign;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
case Operators.AssignmentSubtraction:
|
||
{
|
||
if (to.semantic_node_type == semantic_node_type.static_event_reference)
|
||
{
|
||
event_assign = convertion_data_and_alghoritms.create_simple_function_call(
|
||
ser.en.remove_method, loc, right_del);
|
||
}
|
||
else
|
||
{
|
||
if (ser.en.semantic_node_type == semantic_node_type.compiled_event)
|
||
{
|
||
nonstatic_event_reference nser = (nonstatic_event_reference) ser;
|
||
compiled_function_node cfn = (compiled_function_node) ser.en.remove_method;
|
||
compiled_function_call tmp_event_assign = new compiled_function_call(cfn, nser.obj, loc);
|
||
tmp_event_assign.parameters.AddElement(right_del);
|
||
event_assign = tmp_event_assign;
|
||
}
|
||
else if (ser.en.semantic_node_type == semantic_node_type.common_event)
|
||
{
|
||
nonstatic_event_reference nser = (nonstatic_event_reference) ser;
|
||
common_method_node cfn = (common_method_node) ser.en.remove_method;
|
||
common_method_call tmp_event_assign = new common_method_call(cfn, nser.obj, loc);
|
||
tmp_event_assign.parameters.AddElement(right_del);
|
||
event_assign = tmp_event_assign;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
default:
|
||
{
|
||
AddError(loc, "ASSIGN_TO_EVENT");
|
||
//throw new CanNotApplyThisOperationToEvent
|
||
|
||
break;
|
||
}
|
||
}
|
||
return_value(event_assign);
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
}
|
||
}
|