| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| package org.codehaus.groovy.transform.stc; |
| |
| import groovy.lang.Closure; |
| import groovy.lang.DelegatesTo; |
| import groovy.lang.IntRange; |
| import groovy.lang.Tuple2; |
| import groovy.transform.NamedParam; |
| import groovy.transform.NamedParams; |
| import groovy.transform.TypeChecked; |
| import groovy.transform.TypeCheckingMode; |
| import groovy.transform.stc.ClosureParams; |
| import groovy.transform.stc.ClosureSignatureConflictResolver; |
| import groovy.transform.stc.ClosureSignatureHint; |
| import org.apache.groovy.util.SystemUtil; |
| import org.codehaus.groovy.GroovyBugError; |
| import org.codehaus.groovy.ast.ASTNode; |
| import org.codehaus.groovy.ast.AnnotatedNode; |
| import org.codehaus.groovy.ast.AnnotationNode; |
| import org.codehaus.groovy.ast.ClassCodeVisitorSupport; |
| import org.codehaus.groovy.ast.ClassHelper; |
| import org.codehaus.groovy.ast.ClassNode; |
| import org.codehaus.groovy.ast.ConstructorNode; |
| import org.codehaus.groovy.ast.DynamicVariable; |
| import org.codehaus.groovy.ast.FieldNode; |
| import org.codehaus.groovy.ast.GenericsType; |
| import org.codehaus.groovy.ast.GenericsType.GenericsTypeName; |
| import org.codehaus.groovy.ast.InnerClassNode; |
| import org.codehaus.groovy.ast.MethodNode; |
| import org.codehaus.groovy.ast.Parameter; |
| import org.codehaus.groovy.ast.PropertyNode; |
| import org.codehaus.groovy.ast.Variable; |
| import org.codehaus.groovy.ast.expr.AnnotationConstantExpression; |
| import org.codehaus.groovy.ast.expr.ArgumentListExpression; |
| import org.codehaus.groovy.ast.expr.AttributeExpression; |
| import org.codehaus.groovy.ast.expr.BinaryExpression; |
| import org.codehaus.groovy.ast.expr.BitwiseNegationExpression; |
| import org.codehaus.groovy.ast.expr.CastExpression; |
| import org.codehaus.groovy.ast.expr.ClassExpression; |
| import org.codehaus.groovy.ast.expr.ClosureExpression; |
| import org.codehaus.groovy.ast.expr.ClosureListExpression; |
| import org.codehaus.groovy.ast.expr.ConstantExpression; |
| import org.codehaus.groovy.ast.expr.ConstructorCallExpression; |
| import org.codehaus.groovy.ast.expr.DeclarationExpression; |
| import org.codehaus.groovy.ast.expr.ElvisOperatorExpression; |
| import org.codehaus.groovy.ast.expr.EmptyExpression; |
| import org.codehaus.groovy.ast.expr.Expression; |
| import org.codehaus.groovy.ast.expr.FieldExpression; |
| import org.codehaus.groovy.ast.expr.LambdaExpression; |
| import org.codehaus.groovy.ast.expr.ListExpression; |
| import org.codehaus.groovy.ast.expr.MapEntryExpression; |
| import org.codehaus.groovy.ast.expr.MapExpression; |
| import org.codehaus.groovy.ast.expr.MethodCall; |
| import org.codehaus.groovy.ast.expr.MethodCallExpression; |
| import org.codehaus.groovy.ast.expr.MethodReferenceExpression; |
| import org.codehaus.groovy.ast.expr.NotExpression; |
| import org.codehaus.groovy.ast.expr.PostfixExpression; |
| import org.codehaus.groovy.ast.expr.PrefixExpression; |
| import org.codehaus.groovy.ast.expr.PropertyExpression; |
| import org.codehaus.groovy.ast.expr.RangeExpression; |
| import org.codehaus.groovy.ast.expr.SpreadExpression; |
| import org.codehaus.groovy.ast.expr.StaticMethodCallExpression; |
| import org.codehaus.groovy.ast.expr.TernaryExpression; |
| import org.codehaus.groovy.ast.expr.TupleExpression; |
| import org.codehaus.groovy.ast.expr.UnaryMinusExpression; |
| import org.codehaus.groovy.ast.expr.UnaryPlusExpression; |
| import org.codehaus.groovy.ast.expr.VariableExpression; |
| import org.codehaus.groovy.ast.stmt.BlockStatement; |
| import org.codehaus.groovy.ast.stmt.CaseStatement; |
| import org.codehaus.groovy.ast.stmt.CatchStatement; |
| import org.codehaus.groovy.ast.stmt.EmptyStatement; |
| import org.codehaus.groovy.ast.stmt.ExpressionStatement; |
| import org.codehaus.groovy.ast.stmt.ForStatement; |
| import org.codehaus.groovy.ast.stmt.IfStatement; |
| import org.codehaus.groovy.ast.stmt.ReturnStatement; |
| import org.codehaus.groovy.ast.stmt.Statement; |
| import org.codehaus.groovy.ast.stmt.SwitchStatement; |
| import org.codehaus.groovy.ast.stmt.TryCatchStatement; |
| import org.codehaus.groovy.ast.stmt.WhileStatement; |
| import org.codehaus.groovy.ast.tools.GenericsUtils; |
| import org.codehaus.groovy.ast.tools.WideningCategories; |
| import org.codehaus.groovy.ast.tools.WideningCategories.LowestUpperBoundClassNode; |
| import org.codehaus.groovy.classgen.ReturnAdder; |
| import org.codehaus.groovy.classgen.Verifier; |
| import org.codehaus.groovy.classgen.asm.InvocationWriter; |
| import org.codehaus.groovy.control.CompilationUnit; |
| import org.codehaus.groovy.control.ErrorCollector; |
| import org.codehaus.groovy.control.ResolveVisitor; |
| import org.codehaus.groovy.control.SourceUnit; |
| import org.codehaus.groovy.control.messages.SyntaxErrorMessage; |
| import org.codehaus.groovy.runtime.DefaultGroovyMethods; |
| import org.codehaus.groovy.syntax.SyntaxException; |
| import org.codehaus.groovy.syntax.Token; |
| import org.codehaus.groovy.syntax.TokenUtil; |
| import org.codehaus.groovy.transform.StaticTypesTransformation; |
| import org.codehaus.groovy.transform.trait.Traits; |
| import org.codehaus.groovy.util.ListHashMap; |
| import org.objectweb.asm.Opcodes; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Modifier; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.LinkedHashMap; |
| import java.util.LinkedHashSet; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Optional; |
| import java.util.Queue; |
| import java.util.Set; |
| import java.util.concurrent.atomic.AtomicLong; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import static org.apache.groovy.util.BeanUtils.capitalize; |
| import static org.apache.groovy.util.BeanUtils.decapitalize; |
| import static org.codehaus.groovy.ast.ClassHelper.AUTOCLOSEABLE_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.BigDecimal_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.BigInteger_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.Boolean_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.Byte_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.CLASS_Type; |
| import static org.codehaus.groovy.ast.ClassHelper.CLOSURE_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.Character_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.DYNAMIC_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.Double_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.Float_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.GROOVY_OBJECT_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.GSTRING_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.Integer_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.Iterator_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.LIST_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.Long_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.MAP_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.Number_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.OBJECT_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.PATTERN_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.RANGE_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.STRING_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.Short_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.TUPLE_CLASSES; |
| import static org.codehaus.groovy.ast.ClassHelper.VOID_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.boolean_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.byte_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.char_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.double_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.findSAM; |
| import static org.codehaus.groovy.ast.ClassHelper.float_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.getNextSuperClass; |
| import static org.codehaus.groovy.ast.ClassHelper.getUnwrapper; |
| import static org.codehaus.groovy.ast.ClassHelper.getWrapper; |
| import static org.codehaus.groovy.ast.ClassHelper.int_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.isFunctionalInterface; |
| import static org.codehaus.groovy.ast.ClassHelper.isNumberType; |
| import static org.codehaus.groovy.ast.ClassHelper.isPrimitiveType; |
| import static org.codehaus.groovy.ast.ClassHelper.isSAMType; |
| import static org.codehaus.groovy.ast.ClassHelper.long_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.short_TYPE; |
| import static org.codehaus.groovy.ast.ClassHelper.void_WRAPPER_TYPE; |
| import static org.codehaus.groovy.ast.tools.ClosureUtils.getParametersSafe; |
| import static org.codehaus.groovy.ast.tools.GeneralUtils.args; |
| import static org.codehaus.groovy.ast.tools.GeneralUtils.binX; |
| import static org.codehaus.groovy.ast.tools.GeneralUtils.block; |
| import static org.codehaus.groovy.ast.tools.GeneralUtils.callX; |
| import static org.codehaus.groovy.ast.tools.GeneralUtils.castX; |
| import static org.codehaus.groovy.ast.tools.GeneralUtils.constX; |
| import static org.codehaus.groovy.ast.tools.GeneralUtils.isOrImplements; |
| import static org.codehaus.groovy.ast.tools.GeneralUtils.localVarX; |
| import static org.codehaus.groovy.ast.tools.GeneralUtils.thisPropX; |
| import static org.codehaus.groovy.ast.tools.GeneralUtils.varX; |
| import static org.codehaus.groovy.ast.tools.GenericsUtils.findActualTypeByGenericsPlaceholderName; |
| import static org.codehaus.groovy.ast.tools.GenericsUtils.makeDeclaringAndActualGenericsTypeMap; |
| import static org.codehaus.groovy.ast.tools.GenericsUtils.toGenericTypesString; |
| import static org.codehaus.groovy.ast.tools.WideningCategories.isBigDecCategory; |
| import static org.codehaus.groovy.ast.tools.WideningCategories.isBigIntCategory; |
| import static org.codehaus.groovy.ast.tools.WideningCategories.isDouble; |
| import static org.codehaus.groovy.ast.tools.WideningCategories.isDoubleCategory; |
| import static org.codehaus.groovy.ast.tools.WideningCategories.isFloat; |
| import static org.codehaus.groovy.ast.tools.WideningCategories.isFloatingCategory; |
| import static org.codehaus.groovy.ast.tools.WideningCategories.isIntCategory; |
| import static org.codehaus.groovy.ast.tools.WideningCategories.isLongCategory; |
| import static org.codehaus.groovy.ast.tools.WideningCategories.isNumberCategory; |
| import static org.codehaus.groovy.ast.tools.WideningCategories.lowestUpperBound; |
| import static org.codehaus.groovy.classgen.AsmClassGenerator.MINIMUM_BYTECODE_VERSION; |
| import static org.codehaus.groovy.syntax.Types.ASSIGN; |
| import static org.codehaus.groovy.syntax.Types.ASSIGNMENT_OPERATOR; |
| import static org.codehaus.groovy.syntax.Types.COMPARE_EQUAL; |
| import static org.codehaus.groovy.syntax.Types.COMPARE_NOT_EQUAL; |
| import static org.codehaus.groovy.syntax.Types.COMPARE_NOT_IN; |
| import static org.codehaus.groovy.syntax.Types.COMPARE_NOT_INSTANCEOF; |
| import static org.codehaus.groovy.syntax.Types.COMPARE_TO; |
| import static org.codehaus.groovy.syntax.Types.DIVIDE; |
| import static org.codehaus.groovy.syntax.Types.DIVIDE_EQUAL; |
| import static org.codehaus.groovy.syntax.Types.ELVIS_EQUAL; |
| import static org.codehaus.groovy.syntax.Types.EQUAL; |
| import static org.codehaus.groovy.syntax.Types.FIND_REGEX; |
| import static org.codehaus.groovy.syntax.Types.INTDIV; |
| import static org.codehaus.groovy.syntax.Types.INTDIV_EQUAL; |
| import static org.codehaus.groovy.syntax.Types.KEYWORD_IN; |
| import static org.codehaus.groovy.syntax.Types.KEYWORD_INSTANCEOF; |
| import static org.codehaus.groovy.syntax.Types.LEFT_SQUARE_BRACKET; |
| import static org.codehaus.groovy.syntax.Types.MINUS_MINUS; |
| import static org.codehaus.groovy.syntax.Types.MOD; |
| import static org.codehaus.groovy.syntax.Types.MOD_EQUAL; |
| import static org.codehaus.groovy.syntax.Types.PLUS_PLUS; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.ArrayList_TYPE; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.Collection_TYPE; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.Matcher_TYPE; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.NUMBER_OPS; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.UNKNOWN_PARAMETER_TYPE; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.addMethodLevelDeclaredGenerics; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.allParametersAndArgumentsMatch; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.applyGenericsConnections; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.applyGenericsContext; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.applyGenericsContextToParameterClass; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.boundUnboundedWildcards; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.checkCompatibleAssignmentTypes; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.checkPossibleLossOfPrecision; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.chooseBestMethod; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.evaluateExpression; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.extractGenericsConnections; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.extractGenericsParameterMapOfThis; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.findDGMMethodsByNameAndArguments; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.findSetters; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.findTargetVariable; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.fullyResolveType; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.getCorrectedClassNode; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.getGenericsWithoutArray; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.getOperationName; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.implementsInterfaceOrIsSubclassOf; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isArrayOp; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isAssignableTo; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isAssignment; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isBeingCompiled; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isBitOperator; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isBoolIntrinsicOp; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isClassClassNodeWrappingConcreteType; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isCompareToBoolean; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isOperationInGroup; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isParameterizedWithGStringOrGStringString; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isParameterizedWithString; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isPowerOperator; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isShiftOperation; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isTraitSelf; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isUsingGenericsOrIsArrayUsingGenerics; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isVargs; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.isWildcardLeftHandSide; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.lastArgMatchesVarg; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.missesGenericsTypes; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.prettyPrintType; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.resolveClassNodeGenerics; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.toMethodParametersString; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.typeCheckMethodArgumentWithGenerics; |
| import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.typeCheckMethodsWithGenerics; |
| import static org.codehaus.groovy.transform.stc.StaticTypesMarker.CLOSURE_ARGUMENTS; |
| import static org.codehaus.groovy.transform.stc.StaticTypesMarker.CONSTRUCTED_LAMBDA_EXPRESSION; |
| import static org.codehaus.groovy.transform.stc.StaticTypesMarker.DECLARATION_INFERRED_TYPE; |
| import static org.codehaus.groovy.transform.stc.StaticTypesMarker.DELEGATION_METADATA; |
| import static org.codehaus.groovy.transform.stc.StaticTypesMarker.DIRECT_METHOD_CALL_TARGET; |
| import static org.codehaus.groovy.transform.stc.StaticTypesMarker.DYNAMIC_RESOLUTION; |
| import static org.codehaus.groovy.transform.stc.StaticTypesMarker.IMPLICIT_RECEIVER; |
| import static org.codehaus.groovy.transform.stc.StaticTypesMarker.INFERRED_RETURN_TYPE; |
| import static org.codehaus.groovy.transform.stc.StaticTypesMarker.INFERRED_TYPE; |
| import static org.codehaus.groovy.transform.stc.StaticTypesMarker.PV_FIELDS_ACCESS; |
| import static org.codehaus.groovy.transform.stc.StaticTypesMarker.PV_FIELDS_MUTATION; |
| import static org.codehaus.groovy.transform.stc.StaticTypesMarker.PV_METHODS_ACCESS; |
| import static org.codehaus.groovy.transform.stc.StaticTypesMarker.READONLY_PROPERTY; |
| import static org.codehaus.groovy.transform.stc.StaticTypesMarker.SUPER_MOP_METHOD_REQUIRED; |
| import static org.codehaus.groovy.transform.stc.StaticTypesMarker.TYPE; |
| |
| /** |
| * The main class code visitor responsible for static type checking. It will perform various inspections like checking |
| * assignment types, type inference, ... Eventually, class nodes may be annotated with inferred type information. |
| */ |
| public class StaticTypeCheckingVisitor extends ClassCodeVisitorSupport { |
| |
| private static final boolean DEBUG_GENERATED_CODE = SystemUtil.getBooleanSafe("groovy.stc.debug"); |
| private static final AtomicLong UNIQUE_LONG = new AtomicLong(); |
| |
| protected static final Object ERROR_COLLECTOR = ErrorCollector.class; |
| protected static final ClassNode ITERABLE_TYPE = ClassHelper.make(Iterable.class); |
| protected static final List<MethodNode> EMPTY_METHODNODE_LIST = Collections.emptyList(); |
| protected static final ClassNode TYPECHECKED_CLASSNODE = ClassHelper.make(TypeChecked.class); |
| protected static final ClassNode[] TYPECHECKING_ANNOTATIONS = new ClassNode[]{TYPECHECKED_CLASSNODE}; |
| protected static final ClassNode TYPECHECKING_INFO_NODE = ClassHelper.make(TypeChecked.TypeCheckingInfo.class); |
| protected static final ClassNode DGM_CLASSNODE = ClassHelper.make(DefaultGroovyMethods.class); |
| protected static final int CURRENT_SIGNATURE_PROTOCOL_VERSION = 1; |
| protected static final Expression CURRENT_SIGNATURE_PROTOCOL = new ConstantExpression(CURRENT_SIGNATURE_PROTOCOL_VERSION, true); |
| protected static final MethodNode GET_DELEGATE = CLOSURE_TYPE.getGetterMethod("getDelegate"); |
| protected static final MethodNode GET_OWNER = CLOSURE_TYPE.getGetterMethod("getOwner"); |
| protected static final MethodNode GET_THISOBJECT = CLOSURE_TYPE.getGetterMethod("getThisObject"); |
| protected static final ClassNode DELEGATES_TO = ClassHelper.make(DelegatesTo.class); |
| protected static final ClassNode DELEGATES_TO_TARGET = ClassHelper.make(DelegatesTo.Target.class); |
| protected static final ClassNode LINKEDHASHMAP_CLASSNODE = ClassHelper.make(LinkedHashMap.class); |
| protected static final ClassNode CLOSUREPARAMS_CLASSNODE = ClassHelper.make(ClosureParams.class); |
| protected static final ClassNode NAMED_PARAMS_CLASSNODE = ClassHelper.make(NamedParams.class); |
| protected static final ClassNode MAP_ENTRY_TYPE = ClassHelper.make(Map.Entry.class); |
| protected static final ClassNode ENUMERATION_TYPE = ClassHelper.make(Enumeration.class); |
| |
| public static final Statement GENERATED_EMPTY_STATEMENT = EmptyStatement.INSTANCE; |
| |
| // Cache closure call methods |
| public static final MethodNode CLOSURE_CALL_NO_ARG = CLOSURE_TYPE.getDeclaredMethod("call", Parameter.EMPTY_ARRAY); |
| public static final MethodNode CLOSURE_CALL_ONE_ARG = CLOSURE_TYPE.getDeclaredMethod("call", new Parameter[]{new Parameter(OBJECT_TYPE, "arg")}); |
| public static final MethodNode CLOSURE_CALL_VARGS = CLOSURE_TYPE.getDeclaredMethod("call", new Parameter[]{new Parameter(OBJECT_TYPE.makeArray(), "args")}); |
| |
| protected final ReturnAdder.ReturnStatementListener returnListener = new ReturnAdder.ReturnStatementListener() { |
| @Override |
| public void returnStatementAdded(final ReturnStatement returnStatement) { |
| if (isNullConstant(returnStatement.getExpression())) return; |
| checkReturnType(returnStatement); |
| if (typeCheckingContext.getEnclosingClosure() != null) { |
| addClosureReturnType(getType(returnStatement.getExpression())); |
| } else if (typeCheckingContext.getEnclosingMethod() == null) { |
| throw new GroovyBugError("Unexpected return statement at " + returnStatement.getLineNumber() + ":" + returnStatement.getColumnNumber() + " " + returnStatement.getText()); |
| } |
| } |
| }; |
| |
| protected final ReturnAdder returnAdder = new ReturnAdder(returnListener); |
| |
| protected TypeCheckingContext typeCheckingContext; |
| protected DefaultTypeCheckingExtension extension; |
| protected FieldNode currentField; |
| protected PropertyNode currentProperty; |
| |
| public StaticTypeCheckingVisitor(final SourceUnit source, final ClassNode cn) { |
| this.typeCheckingContext = new TypeCheckingContext(this); |
| this.extension = createDefaultTypeCheckingExtension(); |
| this.typeCheckingContext.source = source; |
| this.typeCheckingContext.pushEnclosingClassNode(cn); |
| this.typeCheckingContext.pushErrorCollector(source.getErrorCollector()); |
| this.typeCheckingContext.pushTemporaryTypeInfo(); |
| } |
| |
| private DefaultTypeCheckingExtension createDefaultTypeCheckingExtension() { |
| DefaultTypeCheckingExtension ext = new DefaultTypeCheckingExtension(this); |
| ext.addHandler(new TraitTypeCheckingExtension(this)); |
| ext.addHandler(new EnumTypeCheckingExtension(this)); |
| return ext; |
| } |
| |
| @Override |
| protected SourceUnit getSourceUnit() { |
| return typeCheckingContext.source; |
| } |
| |
| public void initialize() { |
| extension.setup(); |
| } |
| |
| /** |
| * Returns the current type checking context. The context is used internally by the type |
| * checker during type checking to store various state data. |
| * |
| * @return the type checking context |
| */ |
| public TypeCheckingContext getTypeCheckingContext() { |
| return typeCheckingContext; |
| } |
| |
| public void addTypeCheckingExtension(final TypeCheckingExtension extension) { |
| this.extension.addHandler(extension); |
| } |
| |
| public void setCompilationUnit(final CompilationUnit compilationUnit) { |
| typeCheckingContext.setCompilationUnit(compilationUnit); |
| } |
| |
| @Override |
| public void visitClass(final ClassNode node) { |
| if (shouldSkipClassNode(node)) return; |
| if (extension.beforeVisitClass(node)) { |
| extension.afterVisitClass(node); |
| return; |
| } |
| Object type = node.getNodeMetaData(INFERRED_TYPE); |
| if (type != null) { |
| // transformation has already been run on this class node |
| // so we'll use a silent collector in order not to duplicate errors |
| typeCheckingContext.pushErrorCollector(); |
| } |
| typeCheckingContext.pushEnclosingClassNode(node); |
| Set<MethodNode> oldVisitedMethod = typeCheckingContext.alreadyVisitedMethods; |
| typeCheckingContext.alreadyVisitedMethods = new LinkedHashSet<>(); |
| super.visitClass(node); |
| Iterator<InnerClassNode> innerClasses = node.getInnerClasses(); |
| while (innerClasses.hasNext()) { |
| InnerClassNode innerClassNode = innerClasses.next(); |
| visitClass(innerClassNode); |
| } |
| typeCheckingContext.alreadyVisitedMethods = oldVisitedMethod; |
| node.putNodeMetaData(INFERRED_TYPE, node); |
| // mark all methods as visited. We can't do this in visitMethod because the type checker |
| // works in a two pass sequence and we don't want to skip the second pass |
| for (MethodNode methodNode : node.getMethods()) { |
| methodNode.putNodeMetaData(StaticTypeCheckingVisitor.class, Boolean.TRUE); |
| } |
| for (ConstructorNode constructorNode : node.getDeclaredConstructors()) { |
| constructorNode.putNodeMetaData(StaticTypeCheckingVisitor.class, Boolean.TRUE); |
| } |
| extension.afterVisitClass(node); |
| } |
| |
| protected boolean shouldSkipClassNode(final ClassNode node) { |
| return isSkipMode(node); |
| } |
| |
| /** |
| * Returns the list of type checking annotations class nodes. Subclasses may override this method |
| * in order to provide additional classes which must be looked up when checking if a method or |
| * a class node should be skipped. |
| * <p> |
| * The default implementation returns {@link TypeChecked}. |
| * |
| * @return array of class nodes |
| */ |
| protected ClassNode[] getTypeCheckingAnnotations() { |
| return TYPECHECKING_ANNOTATIONS; |
| } |
| |
| public boolean isSkipMode(final AnnotatedNode node) { |
| if (node == null) return false; |
| for (ClassNode tca : getTypeCheckingAnnotations()) { |
| List<AnnotationNode> annotations = node.getAnnotations(tca); |
| if (annotations != null) { |
| for (AnnotationNode annotation : annotations) { |
| Expression value = annotation.getMember("value"); |
| if (value != null) { |
| if (value instanceof ConstantExpression) { |
| ConstantExpression ce = (ConstantExpression) value; |
| if (TypeCheckingMode.SKIP.toString().equals(ce.getValue().toString())) return true; |
| } else if (value instanceof PropertyExpression) { |
| PropertyExpression pe = (PropertyExpression) value; |
| if (TypeCheckingMode.SKIP.toString().equals(pe.getPropertyAsString())) return true; |
| } |
| } |
| } |
| } |
| } |
| if (node instanceof MethodNode) { |
| return isSkipMode(node.getDeclaringClass()); |
| } |
| if (isSkippedInnerClass(node)) return true; |
| return false; |
| } |
| |
| /** |
| * Test if a node is an inner class node, and if it is, then checks if the enclosing method is skipped. |
| * |
| * @return true if the inner class node should be skipped |
| */ |
| protected boolean isSkippedInnerClass(final AnnotatedNode node) { |
| if (!(node instanceof InnerClassNode)) return false; |
| MethodNode enclosingMethod = ((InnerClassNode) node).getEnclosingMethod(); |
| return enclosingMethod != null && isSkipMode(enclosingMethod); |
| } |
| |
| @Override |
| public void visitClassExpression(final ClassExpression expression) { |
| super.visitClassExpression(expression); |
| ClassNode cn = expression.getNodeMetaData(INFERRED_TYPE); |
| if (cn == null) { |
| storeType(expression, getType(expression)); |
| } |
| } |
| |
| private static void addPrivateFieldOrMethodAccess(final Expression source, final ClassNode cn, final StaticTypesMarker key, final ASTNode accessedMember) { |
| cn.getNodeMetaData(key, x -> new LinkedHashSet<>()).add(accessedMember); |
| source.putNodeMetaData(key, accessedMember); |
| } |
| |
| /** |
| * Given a field node, checks if we are accessing or setting a private field from an inner class. |
| */ |
| private void checkOrMarkPrivateAccess(final Expression source, final FieldNode fn, final boolean lhsOfAssignment) { |
| if (fn == null) return; |
| ClassNode declaringClass = fn.getDeclaringClass(), enclosingClassNode = typeCheckingContext.getEnclosingClassNode(); |
| if (fn.isPrivate() && (declaringClass != enclosingClassNode || typeCheckingContext.getEnclosingClosure() != null) |
| && declaringClass.getModule() == enclosingClassNode.getModule()) { |
| if (!lhsOfAssignment && enclosingClassNode.isDerivedFrom(declaringClass)) { |
| // check for a public/protected getter since JavaBean getters haven't been recognised as properties |
| // at this point and we don't want private field access for that case which will be handled later |
| String suffix = Verifier.capitalize(fn.getName()); |
| MethodNode getter = findValidGetter(enclosingClassNode, "get" + suffix); |
| if (getter == null && boolean_TYPE.equals(fn.getOriginType())) { |
| getter = findValidGetter(enclosingClassNode, "is" + suffix); |
| } |
| if (getter != null) { |
| source.putNodeMetaData(INFERRED_TYPE, getter.getReturnType()); |
| return; |
| } |
| } |
| StaticTypesMarker marker = lhsOfAssignment ? PV_FIELDS_MUTATION : PV_FIELDS_ACCESS; |
| addPrivateFieldOrMethodAccess(source, declaringClass, marker, fn); |
| } |
| } |
| |
| private MethodNode findValidGetter(final ClassNode classNode, final String name) { |
| MethodNode getterMethod = classNode.getGetterMethod(name); |
| if (getterMethod != null && (getterMethod.isPublic() || getterMethod.isProtected())) { |
| return getterMethod; |
| } |
| return null; |
| } |
| |
| /** |
| * Given a method node, checks if we are calling a private method from an inner class. |
| */ |
| private void checkOrMarkPrivateAccess(final Expression source, final MethodNode mn) { |
| if (mn == null) { |
| return; |
| } |
| ClassNode declaringClass = mn.getDeclaringClass(); |
| ClassNode enclosingClassNode = typeCheckingContext.getEnclosingClassNode(); |
| if (declaringClass != enclosingClassNode || typeCheckingContext.getEnclosingClosure() != null) { |
| int mods = mn.getModifiers(); |
| boolean sameModule = declaringClass.getModule() == enclosingClassNode.getModule(); |
| String packageName = declaringClass.getPackageName(); |
| if (packageName == null) { |
| packageName = ""; |
| } |
| if ((Modifier.isPrivate(mods) && sameModule)) { |
| addPrivateFieldOrMethodAccess(source, declaringClass, PV_METHODS_ACCESS, mn); |
| } else if (Modifier.isProtected(mods) && !packageName.equals(enclosingClassNode.getPackageName()) |
| && !implementsInterfaceOrIsSubclassOf(enclosingClassNode, declaringClass)) { |
| ClassNode cn = enclosingClassNode; |
| while ((cn = cn.getOuterClass()) != null) { |
| if (implementsInterfaceOrIsSubclassOf(cn, declaringClass)) { |
| addPrivateFieldOrMethodAccess(source, cn, PV_METHODS_ACCESS, mn); |
| break; |
| } |
| } |
| } |
| } |
| } |
| |
| @Override |
| public void visitVariableExpression(final VariableExpression vexp) { |
| super.visitVariableExpression(vexp); |
| if (storeTypeForSuper(vexp)) return; |
| if (storeTypeForThis(vexp)) return; |
| String name = vexp.getName(); |
| |
| TypeCheckingContext.EnclosingClosure enclosingClosure = typeCheckingContext.getEnclosingClosure(); |
| if (enclosingClosure != null) { |
| switch (name) { |
| case "delegate": |
| DelegationMetadata dm = getDelegationMetadata(enclosingClosure.getClosureExpression()); |
| if (dm != null) { |
| storeType(vexp, dm.getType()); |
| return; |
| } |
| // falls through |
| case "owner": |
| if (typeCheckingContext.getEnclosingClosureStack().size() > 1) { |
| storeType(vexp, CLOSURE_TYPE); |
| return; |
| } |
| // falls through |
| case "thisObject": |
| storeType(vexp, typeCheckingContext.getEnclosingClassNode()); |
| return; |
| } |
| } |
| |
| Variable accessedVariable = vexp.getAccessedVariable(); |
| VariableExpression localVariableExpression = null; |
| if (accessedVariable instanceof DynamicVariable) { |
| // a dynamic variable is either a class member used in a 'with' or an undeclared variable |
| |
| if (tryVariableExpressionAsProperty(vexp, name)) return; |
| |
| if (!extension.handleUnresolvedVariableExpression(vexp)) { |
| addStaticTypeError("The variable [" + name + "] is undeclared.", vexp); |
| } |
| } else if (accessedVariable instanceof FieldNode) { |
| if (enclosingClosure != null) { |
| tryVariableExpressionAsProperty(vexp, name); |
| } else { |
| // GROOVY-7691 |
| FieldNode fieldNode = (FieldNode) accessedVariable; |
| ClassNode actualType = findActualTypeByGenericsPlaceholderName( |
| fieldNode.getOriginType().getUnresolvedName(), |
| makeDeclaringAndActualGenericsTypeMap(fieldNode.getDeclaringClass(), typeCheckingContext.getEnclosingClassNode()) |
| ); |
| if (actualType != null) { |
| storeType(vexp, actualType); |
| } |
| } |
| } else if (accessedVariable instanceof PropertyNode) { |
| // we must be careful, because the property node may be of a wrong type: |
| // if a class contains a getter and a setter of different types or |
| // overloaded setters, the type of the property node is arbitrary! |
| if (tryVariableExpressionAsProperty(vexp, name)) { |
| BinaryExpression enclosingBinaryExpression = typeCheckingContext.getEnclosingBinaryExpression(); |
| if (enclosingBinaryExpression != null) { |
| Expression leftExpression = enclosingBinaryExpression.getLeftExpression(); |
| SetterInfo setterInfo = removeSetterInfo(leftExpression); |
| if (setterInfo != null) { |
| Expression rightExpression = enclosingBinaryExpression.getRightExpression(); |
| if (!ensureValidSetter(vexp, leftExpression, rightExpression, setterInfo)) { |
| return; |
| } |
| } |
| } |
| } |
| } else if (accessedVariable instanceof Parameter) { |
| if (enclosingClosure == null) { |
| localVariableExpression = new ParameterVariableExpression((Parameter) accessedVariable); |
| } |
| } else if (accessedVariable instanceof VariableExpression) { |
| if (enclosingClosure == null) { |
| localVariableExpression = (VariableExpression) accessedVariable; |
| } |
| } |
| |
| if (localVariableExpression != null) { |
| ClassNode inferredType = localVariableExpression.getNodeMetaData(INFERRED_TYPE); |
| inferredType = getInferredTypeFromTempInfo(localVariableExpression, inferredType); |
| if (inferredType != null && !inferredType.equals(OBJECT_TYPE)) { |
| vexp.putNodeMetaData(INFERRED_RETURN_TYPE, inferredType); |
| } |
| } |
| } |
| |
| private boolean storeTypeForSuper(final VariableExpression vexp) { |
| if (vexp == VariableExpression.SUPER_EXPRESSION) return true; |
| if (!vexp.isSuperExpression()) return false; |
| ClassNode superClassNode = typeCheckingContext.getEnclosingClassNode().getSuperClass(); |
| storeType(vexp, makeType(superClassNode, typeCheckingContext.isInStaticContext)); |
| return true; |
| } |
| |
| private boolean storeTypeForThis(final VariableExpression vexp) { |
| if (vexp == VariableExpression.THIS_EXPRESSION) return true; |
| if (!vexp.isThisExpression()) return false; |
| ClassNode enclosingClassNode = typeCheckingContext.getEnclosingClassNode(); |
| storeType(vexp, makeType(enclosingClassNode, typeCheckingContext.isInStaticContext)); |
| return true; |
| } |
| |
| private boolean tryVariableExpressionAsProperty(final VariableExpression vexp, final String dynName) { |
| PropertyExpression pexp = thisPropX(true, dynName); |
| if (visitPropertyExpressionSilent(pexp, vexp)) { |
| vexp.copyNodeMetaData(pexp.getObjectExpression()); |
| for (Object key : new Object[]{IMPLICIT_RECEIVER, READONLY_PROPERTY, PV_FIELDS_ACCESS, PV_FIELDS_MUTATION, DECLARATION_INFERRED_TYPE, DIRECT_METHOD_CALL_TARGET}) { |
| Object val = pexp.getNodeMetaData(key); |
| if (val != null) vexp.putNodeMetaData(key, val); |
| } |
| vexp.removeNodeMetaData(INFERRED_TYPE); |
| storeType(vexp, getType(pexp)); |
| return true; |
| } |
| return false; |
| } |
| |
| private boolean visitPropertyExpressionSilent(final PropertyExpression pe, final Expression lhsPart) { |
| return existsProperty(pe, !isLHSOfEnclosingAssignment(lhsPart)); |
| } |
| |
| @Override |
| public void visitPropertyExpression(final PropertyExpression pexp) { |
| if (visitPropertyExpressionSilent(pexp, pexp)) return; |
| |
| if (!extension.handleUnresolvedProperty(pexp)) { |
| Expression objectExpression = pexp.getObjectExpression(); |
| addStaticTypeError("No such property: " + pexp.getPropertyAsString() + " for class: " + |
| findCurrentInstanceOfClass(objectExpression, getType(objectExpression)).toString(false), pexp); |
| } |
| } |
| |
| private boolean isLHSOfEnclosingAssignment(final Expression expression) { |
| return Optional.ofNullable(typeCheckingContext.getEnclosingBinaryExpression()) |
| .filter(be -> be.getLeftExpression() == expression && isAssignment(be.getOperation().getType())).isPresent(); |
| } |
| |
| @Override |
| public void visitAttributeExpression(final AttributeExpression expression) { |
| super.visitAttributeExpression(expression); |
| if (!existsProperty(expression, true) && !extension.handleUnresolvedAttribute(expression)) { |
| Expression objectExpression = expression.getObjectExpression(); |
| addStaticTypeError("No such property: " + expression.getPropertyAsString() + " for class: " + |
| findCurrentInstanceOfClass(objectExpression, objectExpression.getType()), expression); |
| } |
| } |
| |
| @Override |
| public void visitRangeExpression(final RangeExpression expression) { |
| super.visitRangeExpression(expression); |
| ClassNode fromType = getWrapper(getType(expression.getFrom())); |
| ClassNode toType = getWrapper(getType(expression.getTo())); |
| if (Integer_TYPE.equals(fromType) && Integer_TYPE.equals(toType)) { |
| storeType(expression, ClassHelper.make(IntRange.class)); |
| } else { |
| ClassNode rangeType = RANGE_TYPE.getPlainNodeReference(); |
| rangeType.setGenericsTypes(new GenericsType[]{new GenericsType(WideningCategories.lowestUpperBound(fromType, toType))}); |
| storeType(expression, rangeType); |
| } |
| } |
| |
| @Override |
| public void visitBinaryExpression(final BinaryExpression expression) { |
| BinaryExpression enclosingBinaryExpression = typeCheckingContext.getEnclosingBinaryExpression(); |
| typeCheckingContext.pushEnclosingBinaryExpression(expression); |
| try { |
| int op = expression.getOperation().getType(); |
| Expression leftExpression = expression.getLeftExpression(); |
| Expression rightExpression = expression.getRightExpression(); |
| |
| leftExpression.visit(this); |
| SetterInfo setterInfo = removeSetterInfo(leftExpression); |
| ClassNode lType = null; |
| if (setterInfo != null) { |
| if (ensureValidSetter(expression, leftExpression, rightExpression, setterInfo)) { |
| return; |
| } |
| } else { |
| lType = getType(leftExpression); |
| boolean isFunctionalInterface = isFunctionalInterface(lType); |
| if (isFunctionalInterface && rightExpression instanceof MethodReferenceExpression) { |
| LambdaExpression lambdaExpression = constructLambdaExpressionForMethodReference(lType); |
| if (op == ASSIGN) { |
| inferParameterAndReturnTypesOfClosureOnRHS(lType, lambdaExpression); |
| } |
| rightExpression.putNodeMetaData(CONSTRUCTED_LAMBDA_EXPRESSION, lambdaExpression); |
| rightExpression.putNodeMetaData(CLOSURE_ARGUMENTS, Arrays.stream(lambdaExpression.getParameters()).map(Parameter::getType).toArray(ClassNode[]::new)); |
| |
| } else if (op == ASSIGN && isFunctionalInterface && rightExpression instanceof ClosureExpression) { |
| inferParameterAndReturnTypesOfClosureOnRHS(lType, (ClosureExpression) rightExpression); |
| } |
| |
| rightExpression.visit(this); |
| } |
| |
| if (lType == null) lType = getType(leftExpression); |
| ClassNode rType = (isNullConstant(rightExpression) && !isPrimitiveType(lType) |
| // primitive types should be ignored as they will result in another failure |
| ? UNKNOWN_PARAMETER_TYPE |
| : getType(rightExpression) |
| ); |
| |
| BinaryExpression reversedBinaryExpression = binX(rightExpression, expression.getOperation(), leftExpression); |
| ClassNode resultType = (op == KEYWORD_IN || op == COMPARE_NOT_IN) |
| ? getResultType(rType, op, lType, reversedBinaryExpression) |
| : getResultType(lType, op, rType, expression); |
| if (op == KEYWORD_IN || op == COMPARE_NOT_IN) { |
| // in case of the "in" operator, the receiver and the arguments are reversed |
| // so we use the reversedExpression and get the target method from it |
| storeTargetMethod(expression, reversedBinaryExpression.getNodeMetaData(DIRECT_METHOD_CALL_TARGET)); |
| } else if (op == LEFT_SQUARE_BRACKET |
| && leftExpression instanceof VariableExpression |
| && leftExpression.getNodeMetaData(INFERRED_TYPE) == null) { |
| storeType(leftExpression, lType); |
| } else if (op == ELVIS_EQUAL) { |
| ElvisOperatorExpression elvisOperatorExpression = new ElvisOperatorExpression(leftExpression, rightExpression); |
| elvisOperatorExpression.setSourcePosition(expression); |
| elvisOperatorExpression.visit(this); |
| resultType = getType(elvisOperatorExpression); |
| storeType(leftExpression, resultType); |
| } |
| |
| if (resultType == null) { |
| resultType = lType; |
| } |
| |
| // if left expression is a closure shared variable, a second pass should be done |
| if (leftExpression instanceof VariableExpression) { |
| VariableExpression leftVar = (VariableExpression) leftExpression; |
| if (leftVar.isClosureSharedVariable()) { |
| // if left expression is a closure shared variable, we should check it twice |
| // see GROOVY-5874 |
| typeCheckingContext.secondPassExpressions.add(new SecondPassExpression<>(expression)); |
| } |
| } |
| |
| boolean isAssignment = expression.getOperation().isA(ASSIGNMENT_OPERATOR); |
| if (isAssignment && lType.isUsingGenerics() && missesGenericsTypes(resultType)) { |
| // unchecked assignment |
| // examples: |
| // List<A> list = [] |
| // List<A> list = new LinkedList() |
| // Iterable<A> list = new LinkedList() |
| |
| // in that case, the inferred type of the binary expression is the type of the RHS |
| // "completed" with generics type information available in the LHS |
| ClassNode completedType = GenericsUtils.parameterizeType(lType, resultType.getPlainNodeReference()); |
| |
| resultType = completedType; |
| } |
| |
| if (isArrayOp(op) |
| && !lType.isArray() |
| && enclosingBinaryExpression != null |
| && enclosingBinaryExpression.getLeftExpression() == expression |
| && isAssignment(enclosingBinaryExpression.getOperation().getType())) { |
| // left hand side of an assignment : map['foo'] = ... |
| Expression enclosingBE_rightExpr = enclosingBinaryExpression.getRightExpression(); |
| if (!(enclosingBE_rightExpr instanceof ClosureExpression)) { |
| enclosingBE_rightExpr.visit(this); |
| } |
| ClassNode[] arguments = {rType, getType(enclosingBE_rightExpr)}; |
| List<MethodNode> nodes = findMethod(lType.redirect(), "putAt", arguments); |
| if (nodes.size() == 1) { |
| typeCheckMethodsWithGenericsOrFail(lType, arguments, nodes.get(0), enclosingBE_rightExpr); |
| } else if (nodes.isEmpty()) { |
| addNoMatchingMethodError(lType, "putAt", arguments, enclosingBinaryExpression); |
| } |
| } |
| |
| boolean isEmptyDeclaration = (expression instanceof DeclarationExpression && rightExpression instanceof EmptyExpression); |
| if (isAssignment && !isEmptyDeclaration) { |
| if (rightExpression instanceof ConstructorCallExpression) { |
| inferDiamondType((ConstructorCallExpression) rightExpression, lType); |
| } |
| |
| ClassNode originType = getOriginalDeclarationType(leftExpression); |
| typeCheckAssignment(expression, leftExpression, originType, rightExpression, resultType); |
| // if assignment succeeds but result type is not a subtype of original type, then we are in a special cast handling |
| // and we must update the result type |
| if (!implementsInterfaceOrIsSubclassOf(getWrapper(resultType), getWrapper(originType))) { |
| resultType = originType; |
| } else if (lType.isUsingGenerics() && !lType.isEnum() && hasRHSIncompleteGenericTypeInfo(resultType)) { |
| // for example, LHS is List<ConcreteClass> and RHS is List<T> where T is a placeholder |
| resultType = lType; |
| } |
| |
| // make sure we keep primitive types |
| if (isPrimitiveType(originType) && resultType.equals(getWrapper(originType))) { |
| resultType = originType; |
| } |
| |
| // if we are in an if/else branch, keep track of assignment |
| if (typeCheckingContext.ifElseForWhileAssignmentTracker != null && leftExpression instanceof VariableExpression |
| && !isNullConstant(rightExpression)) { |
| Variable accessedVariable = ((VariableExpression) leftExpression).getAccessedVariable(); |
| if (accessedVariable instanceof Parameter) { |
| accessedVariable = new ParameterVariableExpression((Parameter) accessedVariable); |
| } |
| if (accessedVariable instanceof VariableExpression) { |
| VariableExpression var = (VariableExpression) accessedVariable; |
| List<ClassNode> types = typeCheckingContext.ifElseForWhileAssignmentTracker.get(var); |
| if (types == null) { |
| types = new LinkedList<>(); |
| ClassNode type = var.getNodeMetaData(INFERRED_TYPE); |
| types.add(type); |
| typeCheckingContext.ifElseForWhileAssignmentTracker.put(var, types); |
| } |
| types.add(resultType); |
| } |
| } |
| storeType(leftExpression, resultType); |
| |
| // if right expression is a ClosureExpression, store parameter type information |
| if (leftExpression instanceof VariableExpression) { |
| if (rightExpression instanceof ClosureExpression) { |
| leftExpression.putNodeMetaData(CLOSURE_ARGUMENTS, ((ClosureExpression) rightExpression).getParameters()); |
| } else if (rightExpression instanceof VariableExpression |
| && ((VariableExpression) rightExpression).getAccessedVariable() instanceof Expression |
| && ((Expression) ((VariableExpression) rightExpression).getAccessedVariable()).getNodeMetaData(CLOSURE_ARGUMENTS) != null) { |
| Variable targetVariable = findTargetVariable((VariableExpression) leftExpression); |
| if (targetVariable instanceof ASTNode) { |
| ((ASTNode) targetVariable).putNodeMetaData(CLOSURE_ARGUMENTS, ((Expression) ((VariableExpression) rightExpression).getAccessedVariable()).getNodeMetaData(CLOSURE_ARGUMENTS)); |
| } |
| } |
| } |
| } else if (op == KEYWORD_INSTANCEOF /*|| op == COMPARE_NOT_INSTANCEOF*/) { |
| pushInstanceOfTypeInfo(leftExpression, rightExpression); |
| } |
| if (!isEmptyDeclaration) { |
| storeType(expression, resultType); |
| } |
| |
| validateResourceInARM(expression, resultType); |
| } finally { |
| typeCheckingContext.popEnclosingBinaryExpression(); |
| } |
| } |
| |
| private void validateResourceInARM(final BinaryExpression expression, final ClassNode lType) { |
| if (expression instanceof DeclarationExpression) { |
| if (TryCatchStatement.isResource(expression)) { |
| if (!lType.implementsInterface(AUTOCLOSEABLE_TYPE)) { |
| addError("Resource[" + lType.getName() + "] in ARM should be of type AutoCloseable", expression); |
| } |
| } |
| } |
| } |
| |
| private void inferParameterAndReturnTypesOfClosureOnRHS(final ClassNode lhsType, final ClosureExpression rhsExpression) { |
| Tuple2<ClassNode[], ClassNode> typeInfo = GenericsUtils.parameterizeSAM(lhsType); |
| Parameter[] closureParameters = getParametersSafe(rhsExpression); |
| ClassNode[] parameterTypes = typeInfo.getV1(); |
| |
| int n = closureParameters.length; |
| if (n == parameterTypes.length) { |
| for (int i = 0; i < n; i += 1) { |
| Parameter parameter = closureParameters[i]; |
| if (parameter.isDynamicTyped()) { |
| parameter.setType(parameterTypes[i]); |
| parameter.setOriginType(parameterTypes[i]); |
| } |
| } |
| } else { |
| addStaticTypeError("Wrong number of parameters: ", rhsExpression); |
| } |
| |
| storeInferredReturnType(rhsExpression, typeInfo.getV2()); |
| } |
| |
| /** |
| * Given a binary expression corresponding to an assignment, will check that |
| * the type of the RHS matches one of the possible setters and if not, throw |
| * a type checking error. |
| * |
| * @param expression the assignment expression |
| * @param leftExpression left expression of the assignment |
| * @param rightExpression right expression of the assignment |
| * @param setterInfo possible setters |
| * @return true if type checking passed |
| */ |
| private boolean ensureValidSetter(final Expression expression, final Expression leftExpression, final Expression rightExpression, final SetterInfo setterInfo) { |
| // for expressions like foo = { ... } |
| // we know that the RHS type is a closure |
| // but we must check if the binary expression is an assignment |
| // because we need to check if a setter uses @DelegatesTo |
| VariableExpression ve = varX("%", setterInfo.receiverType); |
| // for compound assignment "x op= y" find type as if it was "x = (x op y)" |
| Expression newRightExpression = isCompoundAssignment(expression) |
| ? binX(leftExpression, getOpWithoutEqual(expression), rightExpression) |
| : rightExpression; |
| MethodCallExpression call = callX(ve, setterInfo.name, newRightExpression); |
| call.setImplicitThis(false); |
| visitMethodCallExpression(call); |
| MethodNode directSetterCandidate = call.getNodeMetaData(DIRECT_METHOD_CALL_TARGET); |
| if (directSetterCandidate == null) { |
| // this may happen if there's a setter of type boolean/String/Class, and that we are using the property |
| // notation AND that the RHS is not a boolean/String/Class |
| for (MethodNode setter : setterInfo.setters) { |
| ClassNode type = getWrapper(setter.getParameters()[0].getOriginType()); |
| if (Boolean_TYPE.equals(type) || STRING_TYPE.equals(type) || CLASS_Type.equals(type)) { |
| call = callX(ve, setterInfo.name, castX(type, newRightExpression)); |
| call.setImplicitThis(false); |
| visitMethodCallExpression(call); |
| directSetterCandidate = call.getNodeMetaData(DIRECT_METHOD_CALL_TARGET); |
| if (directSetterCandidate != null) { |
| break; |
| } |
| } |
| } |
| } |
| if (directSetterCandidate != null) { |
| for (MethodNode setter : setterInfo.setters) { |
| if (setter == directSetterCandidate) { |
| leftExpression.putNodeMetaData(DIRECT_METHOD_CALL_TARGET, directSetterCandidate); |
| storeType(leftExpression, getType(newRightExpression)); |
| break; |
| } |
| } |
| } else { |
| ClassNode firstSetterType = setterInfo.setters.iterator().next().getParameters()[0].getOriginType(); |
| addAssignmentError(firstSetterType, getType(newRightExpression), expression); |
| return true; |
| } |
| return false; |
| } |
| |
| private boolean isCompoundAssignment(final Expression exp) { |
| if (!(exp instanceof BinaryExpression)) return false; |
| int type = ((BinaryExpression) exp).getOperation().getType(); |
| return isAssignment(type) && type != ASSIGN; |
| } |
| |
| private Token getOpWithoutEqual(final Expression exp) { |
| if (!(exp instanceof BinaryExpression)) return null; // should never happen |
| Token op = ((BinaryExpression) exp).getOperation(); |
| int typeWithoutEqual = TokenUtil.removeAssignment(op.getType()); |
| return new Token(typeWithoutEqual, op.getText() /* will do */, op.getStartLine(), op.getStartColumn()); |
| } |
| |
| protected ClassNode getOriginalDeclarationType(final Expression lhs) { |
| if (lhs instanceof VariableExpression) { |
| Variable var = findTargetVariable((VariableExpression) lhs); |
| if (var instanceof PropertyNode) { |
| // Do NOT trust the type of the property node! |
| return getType(lhs); |
| } |
| if (var instanceof DynamicVariable) return getType(lhs); |
| return var.getOriginType(); |
| } |
| if (lhs instanceof FieldExpression) { |
| return ((FieldExpression) lhs).getField().getOriginType(); |
| } |
| return getType(lhs); |
| } |
| |
| protected void inferDiamondType(final ConstructorCallExpression cce, final ClassNode lType) { |
| // check if constructor call expression makes use of the diamond operator |
| ClassNode node = cce.getType(); |
| if (node.isUsingGenerics() && node.getGenericsTypes() != null && node.getGenericsTypes().length == 0) { |
| ArgumentListExpression argumentListExpression = InvocationWriter.makeArgumentList(cce.getArguments()); |
| if (argumentListExpression.getExpressions().isEmpty()) { |
| adjustGenerics(lType, node); |
| } else { |
| ClassNode type = getType(argumentListExpression.getExpression(0)); |
| if (type.isUsingGenerics()) { |
| adjustGenerics(type, node); |
| } |
| } |
| // store inferred type on CCE |
| storeType(cce, node); |
| } |
| } |
| |
| private void adjustGenerics(final ClassNode from, final ClassNode to) { |
| GenericsType[] genericsTypes = from.getGenericsTypes(); |
| if (genericsTypes == null) { |
| // case of: def foo = new HashMap<>() |
| genericsTypes = to.redirect().getGenericsTypes(); |
| } |
| GenericsType[] copy = new GenericsType[genericsTypes.length]; |
| for (int i = 0; i < genericsTypes.length; i++) { |
| GenericsType genericsType = genericsTypes[i]; |
| copy[i] = new GenericsType( |
| wrapTypeIfNecessary(genericsType.getType()), |
| genericsType.getUpperBounds(), |
| genericsType.getLowerBound() |
| ); |
| } |
| to.setGenericsTypes(copy); |
| } |
| |
| /** |
| * Stores information about types when [objectOfInstanceof instanceof typeExpression] is visited. |
| * |
| * @param objectOfInstanceOf the expression which must be checked against instanceof |
| * @param typeExpression the expression which represents the target type |
| */ |
| protected void pushInstanceOfTypeInfo(final Expression objectOfInstanceOf, final Expression typeExpression) { |
| List<ClassNode> potentialTypes = typeCheckingContext.temporaryIfBranchTypeInformation.peek() |
| .computeIfAbsent(extractTemporaryTypeInfoKey(objectOfInstanceOf), key -> new LinkedList<>()); |
| potentialTypes.add(typeExpression.getType()); |
| } |
| |
| private boolean typeCheckMultipleAssignmentAndContinue(final Expression leftExpression, Expression rightExpression) { |
| // multiple assignment check |
| if (!(leftExpression instanceof TupleExpression)) return true; |
| |
| Expression transformedRightExpression = transformRightExpressionToSupportMultipleAssignment(rightExpression); |
| if (transformedRightExpression == null) { |
| addStaticTypeError("Multiple assignments without list expressions on the right hand side are unsupported in static type checking mode", rightExpression); |
| return false; |
| } |
| |
| rightExpression = transformedRightExpression; |
| |
| TupleExpression tuple = (TupleExpression) leftExpression; |
| ListExpression list = (ListExpression) rightExpression; |
| List<Expression> listExpressions = list.getExpressions(); |
| List<Expression> tupleExpressions = tuple.getExpressions(); |
| if (listExpressions.size() < tupleExpressions.size()) { |
| addStaticTypeError("Incorrect number of values. Expected:" + tupleExpressions.size() + " Was:" + listExpressions.size(), list); |
| return false; |
| } |
| for (int i = 0, tupleExpressionsSize = tupleExpressions.size(); i < tupleExpressionsSize; i++) { |
| Expression tupleExpression = tupleExpressions.get(i); |
| Expression listExpression = listExpressions.get(i); |
| ClassNode elemType = getType(listExpression); |
| ClassNode tupleType = getType(tupleExpression); |
| if (!isAssignableTo(elemType, tupleType)) { |
| addStaticTypeError("Cannot assign value of type " + elemType.toString(false) + " to variable of type " + tupleType.toString(false), rightExpression); |
| return false; // avoids too many errors |
| } else { |
| storeType(tupleExpression, elemType); |
| } |
| } |
| |
| return true; |
| } |
| |
| private Expression transformRightExpressionToSupportMultipleAssignment(final Expression rightExpression) { |
| if (rightExpression instanceof ListExpression) { |
| return rightExpression; |
| } |
| |
| ClassNode cn = null; |
| if (rightExpression instanceof MethodCallExpression || rightExpression instanceof ConstructorCallExpression || rightExpression instanceof VariableExpression) { |
| ClassNode inferredType = getType(rightExpression); |
| cn = (inferredType == null ? rightExpression.getType() : inferredType); |
| } |
| |
| if (cn == null) { |
| return null; |
| } |
| |
| for (int i = 0, n = TUPLE_CLASSES.length; i < n; i += 1) { |
| Class<?> tcn = TUPLE_CLASSES[i]; |
| if (tcn.equals(cn.getTypeClass())) { |
| ListExpression listExpression = new ListExpression(); |
| GenericsType[] genericsTypes = cn.getGenericsTypes(); |
| for (int j = 0; j < i; j += 1) { |
| // the index of element in tuple starts with 1 |
| MethodCallExpression mce = new MethodCallExpression(rightExpression, "getV" + (j + 1), ArgumentListExpression.EMPTY_ARGUMENTS); |
| ClassNode elementType = (genericsTypes != null ? genericsTypes[j].getType() : OBJECT_TYPE); |
| mce.setType(elementType); |
| storeType(mce, elementType); |
| listExpression.addExpression(mce); |
| } |
| |
| listExpression.setSourcePosition(rightExpression); |
| |
| return listExpression; |
| } |
| } |
| |
| return null; |
| } |
| |
| private static ClassNode adjustTypeForSpreading(final ClassNode inferredRightExpressionType, final Expression leftExpression) { |
| // imagine we have: list*.foo = 100 |
| // then the assignment must be checked against [100], not 100 |
| ClassNode wrappedRHS = inferredRightExpressionType; |
| if (leftExpression instanceof PropertyExpression && ((PropertyExpression) leftExpression).isSpreadSafe()) { |
| wrappedRHS = LIST_TYPE.getPlainNodeReference(); |
| wrappedRHS.setGenericsTypes(new GenericsType[]{ |
| new GenericsType(getWrapper(inferredRightExpressionType)) |
| }); |
| } |
| return wrappedRHS; |
| } |
| |
| private boolean addedReadOnlyPropertyError(final Expression expr) { |
| // if expr is of READONLY_PROPERTY_RETURN type, then it means we are on a missing property |
| if (expr.getNodeMetaData(READONLY_PROPERTY) == null) return false; |
| String name; |
| if (expr instanceof VariableExpression) { |
| name = ((VariableExpression) expr).getName(); |
| } else { |
| name = ((PropertyExpression) expr).getPropertyAsString(); |
| } |
| addStaticTypeError("Cannot set read-only property: " + name, expr); |
| return true; |
| } |
| |
| private void addPrecisionErrors(final ClassNode leftRedirect, final ClassNode lhsType, final ClassNode inferredrhsType, final Expression rightExpression) { |
| if (isNumberType(leftRedirect) && isNumberType(inferredrhsType)) { |
| if (checkPossibleLossOfPrecision(leftRedirect, inferredrhsType, rightExpression)) { |
| addStaticTypeError("Possible loss of precision from " + inferredrhsType + " to " + leftRedirect, rightExpression); |
| return; |
| } |
| } |
| // if left type is array, we should check the right component types |
| if (!lhsType.isArray()) return; |
| ClassNode leftComponentType = lhsType.getComponentType(); |
| ClassNode rightRedirect = rightExpression.getType().redirect(); |
| if (rightRedirect.isArray()) { |
| ClassNode rightComponentType = rightRedirect.getComponentType(); |
| if (!checkCompatibleAssignmentTypes(leftComponentType, rightComponentType)) { |
| addStaticTypeError("Cannot assign value of type " + rightComponentType.toString(false) + " into array of type " + lhsType.toString(false), rightExpression); |
| } |
| } else if (rightExpression instanceof ListExpression) { |
| for (Expression element : ((ListExpression) rightExpression).getExpressions()) { |
| ClassNode rightComponentType = this.getType(element); |
| if (!checkCompatibleAssignmentTypes(leftComponentType, rightComponentType) |
| && !(isNullConstant(element) && !isPrimitiveType(leftComponentType))) { |
| addStaticTypeError("Cannot assign value of type " + rightComponentType.toString(false) + " into array of type " + lhsType.toString(false), rightExpression); |
| } |
| } |
| } |
| } |
| |
| private void addListAssignmentConstructorErrors(final ClassNode leftRedirect, final ClassNode leftExpressionType, final ClassNode inferredRightExpressionType, final Expression rightExpression, final Expression assignmentExpression) { |
| // if left type is not a list but right type is a list, then we're in the case of a groovy |
| // constructor type : Dimension d = [100,200] |
| // In that case, more checks can be performed |
| if (rightExpression instanceof ListExpression && !implementsInterfaceOrIsSubclassOf(LIST_TYPE, leftRedirect)) { |
| ArgumentListExpression argList = args(((ListExpression) rightExpression).getExpressions()); |
| ClassNode[] args = getArgumentTypes(argList); |
| MethodNode methodNode = checkGroovyStyleConstructor(leftRedirect, args, assignmentExpression); |
| if (methodNode != null) { |
| rightExpression.putNodeMetaData(DIRECT_METHOD_CALL_TARGET, methodNode); |
| } |
| } else if (!implementsInterfaceOrIsSubclassOf(inferredRightExpressionType, leftRedirect) |
| && implementsInterfaceOrIsSubclassOf(inferredRightExpressionType, LIST_TYPE) |
| && !isWildcardLeftHandSide(leftExpressionType)) { |
| if (!extension.handleIncompatibleAssignment(leftExpressionType, inferredRightExpressionType, assignmentExpression)) { |
| addAssignmentError(leftExpressionType, inferredRightExpressionType, assignmentExpression); |
| } |
| } |
| } |
| |
| private void addMapAssignmentConstructorErrors(final ClassNode leftRedirect, final Expression leftExpression, final Expression rightExpression) { |
| // if left type is not a list but right type is a map, then we're in the case of a groovy |
| // constructor type : A a = [x:2, y:3] |
| // In this case, more checks can be performed |
| if (!implementsInterfaceOrIsSubclassOf(leftRedirect, MAP_TYPE) && rightExpression instanceof MapExpression) { |
| if (!(leftExpression instanceof VariableExpression) || !((VariableExpression) leftExpression).isDynamicTyped()) { |
| ArgumentListExpression argList = args(rightExpression); |
| ClassNode[] argTypes = getArgumentTypes(argList); |
| checkGroovyStyleConstructor(leftRedirect, argTypes, rightExpression); |
| // perform additional type checking on arguments |
| MapExpression mapExpression = (MapExpression) rightExpression; |
| checkGroovyConstructorMap(leftExpression, leftRedirect, mapExpression); |
| } |
| } |
| } |
| |
| private void checkTypeGenerics(final ClassNode leftExpressionType, final ClassNode wrappedRHS, final Expression rightExpression) { |
| // last, check generic type information to ensure that inferred types are compatible |
| if (!leftExpressionType.isUsingGenerics()) return; |
| // List<Foo> l = new List() is an example for incomplete generics type info |
| // we assume arity related errors are already handled here. |
| if (hasRHSIncompleteGenericTypeInfo(wrappedRHS)) return; |
| |
| GenericsType gt = GenericsUtils.buildWildcardType(leftExpressionType); |
| if (UNKNOWN_PARAMETER_TYPE.equals(wrappedRHS) || |
| gt.isCompatibleWith(wrappedRHS) || |
| isNullConstant(rightExpression)) return; |
| |
| addStaticTypeError("Incompatible generic argument types. Cannot assign " |
| + wrappedRHS.toString(false) |
| + " to: " + leftExpressionType.toString(false), rightExpression); |
| } |
| |
| private boolean hasGStringStringError(final ClassNode leftExpressionType, final ClassNode wrappedRHS, final Expression rightExpression) { |
| if (isParameterizedWithString(leftExpressionType) && isParameterizedWithGStringOrGStringString(wrappedRHS)) { |
| addStaticTypeError("You are trying to use a GString in place of a String in a type which explicitly declares accepting String. " + |
| "Make sure to call toString() on all GString values.", rightExpression); |
| return true; |
| } |
| return false; |
| } |
| |
| protected void typeCheckAssignment(final BinaryExpression assignmentExpression, final Expression leftExpression, final ClassNode leftExpressionType, final Expression rightExpression, final ClassNode inferredRightExpressionTypeOrig) { |
| ClassNode inferredRightExpressionType = inferredRightExpressionTypeOrig; |
| if (!typeCheckMultipleAssignmentAndContinue(leftExpression, rightExpression)) return; |
| |
| if (leftExpression instanceof VariableExpression |
| && ((VariableExpression) leftExpression).getAccessedVariable() instanceof FieldNode) { |
| checkOrMarkPrivateAccess(leftExpression, (FieldNode) ((VariableExpression) leftExpression).getAccessedVariable(), true); |
| } |
| |
| //TODO: need errors for write-only too! |
| if (addedReadOnlyPropertyError(leftExpression)) return; |
| |
| ClassNode leftRedirect = leftExpressionType.redirect(); |
| // see if instanceof applies |
| if (rightExpression instanceof VariableExpression && hasInferredReturnType(rightExpression) && assignmentExpression.getOperation().getType() == EQUAL) { |
| inferredRightExpressionType = rightExpression.getNodeMetaData(INFERRED_RETURN_TYPE); |
| } |
| ClassNode wrappedRHS = adjustTypeForSpreading(inferredRightExpressionType, leftExpression); |
| |
| // check types are compatible for assignment |
| boolean compatible = checkCompatibleAssignmentTypes(leftRedirect, wrappedRHS, rightExpression); |
| |
| |
| if (!compatible) { |
| if (!extension.handleIncompatibleAssignment(leftExpressionType, inferredRightExpressionType, assignmentExpression)) { |
| addAssignmentError(leftExpressionType, inferredRightExpressionType, assignmentExpression.getRightExpression()); |
| } |
| } else { |
| addPrecisionErrors(leftRedirect, leftExpressionType, inferredRightExpressionType, rightExpression); |
| addListAssignmentConstructorErrors(leftRedirect, leftExpressionType, inferredRightExpressionType, rightExpression, assignmentExpression); |
| addMapAssignmentConstructorErrors(leftRedirect, leftExpression, rightExpression); |
| if (hasGStringStringError(leftExpressionType, wrappedRHS, rightExpression)) return; |
| checkTypeGenerics(leftExpressionType, wrappedRHS, rightExpression); |
| } |
| } |
| |
| protected void checkGroovyConstructorMap(final Expression receiver, final ClassNode receiverType, final MapExpression mapExpression) { |
| // workaround for map-style checks putting setter info on wrong AST nodes |
| typeCheckingContext.pushEnclosingBinaryExpression(null); |
| for (MapEntryExpression entryExpression : mapExpression.getMapEntryExpressions()) { |
| Expression keyExpr = entryExpression.getKeyExpression(); |
| if (!(keyExpr instanceof ConstantExpression)) { |
| addStaticTypeError("Dynamic keys in map-style constructors are unsupported in static type checking", keyExpr); |
| } else { |
| AtomicReference<ClassNode> lookup = new AtomicReference<>(); |
| PropertyExpression pexp = new PropertyExpression(varX("_", receiverType), keyExpr.getText()); |
| boolean hasProperty = existsProperty(pexp, false, new PropertyLookupVisitor(lookup)); |
| if (!hasProperty) { |
| addStaticTypeError("No such property: " + keyExpr.getText() + |
| " for class: " + receiverType.getName(), receiver); |
| } else { |
| ClassNode valueType = getType(entryExpression.getValueExpression()); |
| MethodNode setter = receiverType.getSetterMethod("set" + capitalize(pexp.getPropertyAsString()), false); |
| ClassNode toBeAssignedTo = setter == null ? lookup.get() : setter.getParameters()[0].getType(); |
| if (!isAssignableTo(valueType, toBeAssignedTo) |
| && !extension.handleIncompatibleAssignment(toBeAssignedTo, valueType, entryExpression)) { |
| addAssignmentError(toBeAssignedTo, valueType, entryExpression); |
| } |
| } |
| } |
| } |
| typeCheckingContext.popEnclosingBinaryExpression(); |
| } |
| |
| protected static boolean hasRHSIncompleteGenericTypeInfo(final ClassNode inferredRightExpressionType) { |
| boolean replaceType = false; |
| GenericsType[] genericsTypes = inferredRightExpressionType.getGenericsTypes(); |
| if (genericsTypes != null) { |
| for (GenericsType genericsType : genericsTypes) { |
| if (genericsType.isPlaceholder()) { |
| replaceType = true; |
| break; |
| } |
| } |
| } |
| return replaceType; |
| } |
| |
| /** |
| * Checks that a constructor style expression is valid regarding the number |
| * of arguments and the argument types. |
| * |
| * @param node the class node for which we will try to find a matching constructor |
| * @param arguments the constructor arguments |
| * @deprecated use {@link #checkGroovyStyleConstructor(org.codehaus.groovy.ast.ClassNode, org.codehaus.groovy.ast.ClassNode[], org.codehaus.groovy.ast.ASTNode)} )} |
| */ |
| @Deprecated |
| protected void checkGroovyStyleConstructor(final ClassNode node, final ClassNode[] arguments) { |
| checkGroovyStyleConstructor(node, arguments, typeCheckingContext.getEnclosingClassNode()); |
| } |
| |
| /** |
| * Checks that a constructor style expression is valid regarding the number |
| * of arguments and the argument types. |
| * |
| * @param node the class node for which we will try to find a matching constructor |
| * @param arguments the constructor arguments |
| */ |
| protected MethodNode checkGroovyStyleConstructor(final ClassNode node, final ClassNode[] arguments, final ASTNode source) { |
| if (node.equals(OBJECT_TYPE) || node.equals(DYNAMIC_TYPE)) { |
| // in that case, we are facing a list constructor assigned to a def or object |
| return null; |
| } |
| List<ConstructorNode> constructors = node.getDeclaredConstructors(); |
| if (constructors.isEmpty() && arguments.length == 0) { |
| return null; |
| } |
| List<MethodNode> constructorList = findMethod(node, "<init>", arguments); |
| if (constructorList.isEmpty()) { |
| if (isBeingCompiled(node) && arguments.length == 1 && LINKEDHASHMAP_CLASSNODE.equals(arguments[0])) { |
| // there will be a default hash map constructor added later |
| ConstructorNode cn = new ConstructorNode(Opcodes.ACC_PUBLIC, new Parameter[]{new Parameter(LINKEDHASHMAP_CLASSNODE, "args")}, ClassNode.EMPTY_ARRAY, EmptyStatement.INSTANCE); |
| return cn; |
| } else { |
| addStaticTypeError("No matching constructor found: " + node + toMethodParametersString("<init>", arguments), source); |
| return null; |
| } |
| } else if (constructorList.size() > 1) { |
| addStaticTypeError("Ambiguous constructor call " + node + toMethodParametersString("<init>", arguments), source); |
| return null; |
| } |
| return constructorList.get(0); |
| } |
| |
| /** |
| * When instanceof checks are found in the code, we store temporary type |
| * information data in the {@link TypeCheckingContext#temporaryIfBranchTypeInformation} |
| * table. This method computes the key which must be used to store this type |
| * info. |
| * |
| * @param expression the expression for which to compute the key |
| * @return a key to be used for {@link TypeCheckingContext#temporaryIfBranchTypeInformation} |
| */ |
| protected Object extractTemporaryTypeInfoKey(final Expression expression) { |
| return expression instanceof VariableExpression ? findTargetVariable((VariableExpression) expression) : expression.getText(); |
| } |
| |
| /** |
| * A helper method which determines which receiver class should be used in error messages when a field or attribute |
| * is not found. The returned type class depends on whether we have temporary type information available (due to |
| * instanceof checks) and whether there is a single candidate in that case. |
| * |
| * @param expr the expression for which an unknown field has been found |
| * @param type the type of the expression (used as fallback type) |
| * @return if temporary information is available and there's only one type, returns the temporary type class |
| * otherwise falls back to the provided type class. |
| */ |
| protected ClassNode findCurrentInstanceOfClass(final Expression expr, final ClassNode type) { |
| if (!typeCheckingContext.temporaryIfBranchTypeInformation.empty()) { |
| List<ClassNode> nodes = getTemporaryTypesForExpression(expr); |
| if (nodes != null && nodes.size() == 1) return nodes.get(0); |
| } |
| return type; |
| } |
| |
| protected boolean existsProperty(final PropertyExpression pexp, final boolean checkForReadOnly) { |
| return existsProperty(pexp, checkForReadOnly, null); |
| } |
| |
| /** |
| * Checks whether a property exists on the receiver, or on any of the possible receiver classes (found in the |
| * temporary type information table) |
| * |
| * @param pexp a property expression |
| * @param readMode if true, look for property read, else for property set |
| * @param visitor if not null, when the property node is found, visit it with the provided visitor |
| * @return true if the property is defined in any of the possible receiver classes |
| */ |
| protected boolean existsProperty(final PropertyExpression pexp, final boolean readMode, final ClassCodeVisitorSupport visitor) { |
| super.visitPropertyExpression(pexp); |
| |
| String propertyName = pexp.getPropertyAsString(); |
| if (propertyName == null) return false; |
| |
| Expression objectExpression = pexp.getObjectExpression(); |
| ClassNode objectExpressionType = getType(objectExpression); |
| List<ClassNode> enclosingTypes = typeCheckingContext.getEnclosingClassNodes(); |
| |
| boolean staticOnlyAccess = isClassClassNodeWrappingConcreteType(objectExpressionType); |
| if (staticOnlyAccess && "this".equals(propertyName)) { |
| // handle "Outer.this" for any level of nesting |
| ClassNode outer = objectExpressionType.getGenericsTypes()[0].getType(); |
| |
| ClassNode found = null; |
| for (ClassNode enclosingType : enclosingTypes) { |
| if (!enclosingType.isStaticClass() && outer.equals(enclosingType.getOuterClass())) { |
| found = enclosingType; |
| break; |
| } |
| } |
| if (found != null) { |
| storeType(pexp, outer); |
| return true; |
| } |
| } |
| |
| boolean foundGetterOrSetter = false; |
| String capName = capitalize(propertyName); |
| Set<ClassNode> handledNodes = new HashSet<>(); |
| List<Receiver<String>> receivers = new LinkedList<>(); |
| addReceivers(receivers, makeOwnerList(objectExpression), pexp.isImplicitThis()); |
| |
| for (Receiver<String> receiver : receivers) { |
| ClassNode testClass = receiver.getType(); |
| |
| if (testClass.isArray() && "length".equals(propertyName)) { |
| storeType(pexp, int_TYPE); |
| if (visitor != null) { |
| PropertyNode length = new PropertyNode("length", Opcodes.ACC_PUBLIC | Opcodes.ACC_FINAL, int_TYPE, testClass, null, null, null); |
| visitor.visitProperty(length); |
| } |
| return true; |
| } |
| |
| Queue<ClassNode> queue = new LinkedList<>(); |
| queue.add(testClass); |
| if (isPrimitiveType(testClass)) { |
| queue.add(getWrapper(testClass)); |
| } |
| while (!queue.isEmpty()) { |
| ClassNode current = queue.remove(); |
| if (!handledNodes.add(current)) continue; |
| |
| // in case of a lookup on Class we look for instance methods on Class |
| // as well, since in case of a static property access we have the class |
| // itself in the list of receivers already; |
| boolean staticOnly; |
| if (isClassClassNodeWrappingConcreteType(current)) { |
| staticOnly = false; |
| } else { |
| staticOnly = staticOnlyAccess; |
| } |
| |
| FieldNode field = current.getDeclaredField(propertyName); |
| field = allowStaticAccessToMember(field, staticOnly); |
| |
| // skip property/accessor checks for "x.@field" |
| if (field != null && pexp instanceof AttributeExpression) { |
| if (storeField(field, pexp, current, visitor, receiver.getData(), !readMode)) { |
| pexp.removeNodeMetaData(READONLY_PROPERTY); |
| return true; |
| } |
| } |
| |
| // skip property/accessor checks for "field", "this.field", "this.with { field }", etc. in declaring class of field |
| if (field != null && enclosingTypes.contains(current)) { |
| if (storeField(field, pexp, receiver.getType(), visitor, receiver.getData(), !readMode)) { |
| pexp.removeNodeMetaData(READONLY_PROPERTY); |
| return true; |
| } |
| } |
| |
| MethodNode getter = findGetter(current, "get" + capName, pexp.isImplicitThis()); |
| getter = allowStaticAccessToMember(getter, staticOnly); |
| if (getter == null) getter = findGetter(current, "is" + capName, pexp.isImplicitThis()); |
| getter = allowStaticAccessToMember(getter, staticOnly); |
| List<MethodNode> setters = findSetters(current, "set" + capName, false); |
| setters = allowStaticAccessToMember(setters, staticOnly); |
| |
| // need to visit even if we only look for setters for compatibility |
| if (visitor != null && getter != null) visitor.visitMethod(getter); |
| |
| PropertyNode property = current.getProperty(propertyName); |
| property = allowStaticAccessToMember(property, staticOnly); |
| // prefer explicit getter or setter over property if receiver is not 'this' |
| if (property == null || !enclosingTypes.contains(objectExpressionType)) { |
| if (readMode) { |
| if (getter != null) { |
| ClassNode returnType = inferReturnTypeGenerics(current, getter, ArgumentListExpression.EMPTY_ARGUMENTS); |
| storeInferredTypeForPropertyExpression(pexp, returnType); |
| storeTargetMethod(pexp, getter); |
| String delegationData = receiver.getData(); |
| if (delegationData != null) { |
| pexp.putNodeMetaData(IMPLICIT_RECEIVER, delegationData); |
| } |
| return true; |
| } |
| } else { |
| if (!setters.isEmpty()) { |
| if (visitor != null) { |
| if (field != null) { |
| visitor.visitField(field); |
| } else { |
| for (MethodNode setter : setters) { |
| ClassNode setterType = setter.getParameters()[0].getOriginType(); |
| FieldNode virtual = new FieldNode(propertyName, 0, setterType, current, EmptyExpression.INSTANCE); |
| visitor.visitField(virtual); |
| } |
| } |
| } |
| SetterInfo info = new SetterInfo(current, "set" + capName, setters); |
| BinaryExpression enclosingBinaryExpression = typeCheckingContext.getEnclosingBinaryExpression(); |
| if (enclosingBinaryExpression != null) { |
| putSetterInfo(enclosingBinaryExpression.getLeftExpression(), info); |
| } |
| String delegationData = receiver.getData(); |
| if (delegationData != null) { |
| pexp.putNodeMetaData(IMPLICIT_RECEIVER, delegationData); |
| } |
| pexp.removeNodeMetaData(READONLY_PROPERTY); |
| return true; |
| } else if (property == null) { |
| if (field != null && hasAccessToField(typeCheckingContext.getEnclosingClassNode(), field)) { |
| pexp.removeNodeMetaData(READONLY_PROPERTY); |
| } else if (getter != null) { |
| pexp.putNodeMetaData(READONLY_PROPERTY, Boolean.TRUE); |
| } |
| } |
| } |
| } |
| foundGetterOrSetter = (foundGetterOrSetter || !setters.isEmpty() || getter != null); |
| |
| if (property != null && storeProperty(property, pexp, current, visitor, receiver.getData())) return true; |
| |
| if (field != null && storeField(field, pexp, current, visitor, receiver.getData(), !readMode)) return true; |
| |
| // check the super types |
| if (current.getSuperClass() != null) { |
| queue.add(current.getUnresolvedSuperClass()); |
| } |
| for (ClassNode face : current.getAllInterfaces()) { |
| queue.add(GenericsUtils.parameterizeType(current, face)); |
| } |
| } |
| |
| // GROOVY-5568: the property may be defined by DGM |
| List<ClassNode> dgmReceivers = new ArrayList<>(2); |
| dgmReceivers.add(testClass); |
| if (isPrimitiveType(testClass)) |
| dgmReceivers.add(getWrapper(testClass)); |
| for (ClassNode dgmReceiver : dgmReceivers) { |
| List<MethodNode> methods = findDGMMethodsByNameAndArguments(getTransformLoader(), dgmReceiver, "get" + capName, ClassNode.EMPTY_ARRAY); |
| for (MethodNode method : findDGMMethodsByNameAndArguments(getTransformLoader(), dgmReceiver, "is" + capName, ClassNode.EMPTY_ARRAY)) { |
| if (Boolean_TYPE.equals(getWrapper(method.getReturnType()))) methods.add(method); |
| } |
| if (!methods.isEmpty()) { |
| List<MethodNode> bestMethods = chooseBestMethod(dgmReceiver, methods, ClassNode.EMPTY_ARRAY); |
| if (bestMethods.size() == 1) { |
| MethodNode getter = bestMethods.get(0); |
| if (visitor != null) { |
| visitor.visitMethod(getter); |
| } |
| ClassNode returnType = inferReturnTypeGenerics(dgmReceiver, getter, ArgumentListExpression.EMPTY_ARGUMENTS); |
| storeInferredTypeForPropertyExpression(pexp, returnType); |
| if (readMode) storeTargetMethod(pexp, getter); |
| return true; |
| } |
| } |
| } |
| |
| // GROOVY-7996: check if receiver implements get(String)/set(String,Object) or propertyMissing(String) |
| if (!testClass.isArray() && !isPrimitiveType(getUnwrapper(testClass)) |
| && pexp.isImplicitThis() && typeCheckingContext.getEnclosingClosure() != null) { |
| MethodNode mopMethod; |
| if (readMode) { |
| mopMethod = testClass.getMethod("get", new Parameter[]{new Parameter(STRING_TYPE, "name")}); |
| } else { |
| mopMethod = testClass.getMethod("set", new Parameter[]{new Parameter(STRING_TYPE, "name"), new Parameter(OBJECT_TYPE, "value")}); |
| } |
| if (mopMethod == null) mopMethod = testClass.getMethod("propertyMissing", new Parameter[]{new Parameter(STRING_TYPE, "propertyName")}); |
| |
| if (mopMethod != null) { |
| pexp.putNodeMetaData(DYNAMIC_RESOLUTION, Boolean.TRUE); |
| pexp.removeNodeMetaData(DECLARATION_INFERRED_TYPE); |
| pexp.removeNodeMetaData(INFERRED_TYPE); |
| return true; |
| } |
| } |
| } |
| |
| for (Receiver<String> receiver : receivers) { |
| ClassNode testClass = receiver.getType(); |
| ClassNode propertyType = getTypeForMapPropertyExpression(testClass, objectExpressionType, pexp); |
| if (propertyType == null) |
| propertyType = getTypeForListPropertyExpression(testClass, objectExpressionType, pexp); |
| if (propertyType == null) |
| propertyType = getTypeForSpreadExpression(testClass, objectExpressionType, pexp); |
| if (propertyType == null) |
| continue; |
| if (visitor != null) { |
| // TODO: type inference on maps and lists, if possible |
| PropertyNode node = new PropertyNode(propertyName, Opcodes.ACC_PUBLIC, propertyType, receiver.getType(), null, null, null); |
| node.setDeclaringClass(receiver.getType()); |
| visitor.visitProperty(node); |
| } |
| storeType(pexp, propertyType); |
| String delegationData = receiver.getData(); |
| if (delegationData != null) pexp.putNodeMetaData(IMPLICIT_RECEIVER, delegationData); |
| return true; |
| } |
| |
| return foundGetterOrSetter; |
| } |
| |
| private static boolean hasAccessToField(final ClassNode accessor, final FieldNode field) { |
| if (field.isPublic() || accessor.equals(field.getDeclaringClass())) { |
| return true; |
| } |
| if (field.isProtected()) { |
| return accessor.isDerivedFrom(field.getDeclaringClass()); |
| } else { |
| return !field.isPrivate() && Objects.equals(accessor.getPackageName(), field.getDeclaringClass().getPackageName()); |
| } |
| } |
| |
| private MethodNode findGetter(final ClassNode current, String name, final boolean searchOuterClasses) { |
| MethodNode getterMethod = current.getGetterMethod(name); |
| if (getterMethod == null && searchOuterClasses && current.getOuterClass() != null) { |
| return findGetter(current.getOuterClass(), name, true); |
| } |
| return getterMethod; |
| } |
| |
| private ClassNode getTypeForSpreadExpression(final ClassNode testClass, final ClassNode objectExpressionType, final PropertyExpression pexp) { |
| if (!pexp.isSpreadSafe()) return null; |
| MethodCallExpression mce = callX(varX("_", testClass), "iterator", ArgumentListExpression.EMPTY_ARGUMENTS); |
| mce.setImplicitThis(false); |
| mce.visit(this); |
| ClassNode callType = getType(mce); |
| if (!implementsInterfaceOrIsSubclassOf(callType, Iterator_TYPE)) return null; |
| GenericsType[] types = callType.getGenericsTypes(); |
| ClassNode contentType = OBJECT_TYPE; |
| if (types != null && types.length == 1) contentType = types[0].getType(); |
| PropertyExpression subExp = new PropertyExpression(varX("{}", contentType), pexp.getPropertyAsString()); |
| AtomicReference<ClassNode> result = new AtomicReference<>(); |
| if (existsProperty(subExp, true, new PropertyLookupVisitor(result))) { |
| ClassNode intf = LIST_TYPE.getPlainNodeReference(); |
| intf.setGenericsTypes(new GenericsType[]{new GenericsType(getWrapper(result.get()))}); |
| return intf; |
| } |
| return null; |
| } |
| |
| private ClassNode getTypeForListPropertyExpression(final ClassNode testClass, final ClassNode objectExpressionType, final PropertyExpression pexp) { |
| if (!implementsInterfaceOrIsSubclassOf(testClass, LIST_TYPE)) return null; |
| ClassNode intf = GenericsUtils.parameterizeType(objectExpressionType, LIST_TYPE.getPlainNodeReference()); |
| GenericsType[] types = intf.getGenericsTypes(); |
| if (types == null || types.length != 1) return OBJECT_TYPE; |
| |
| PropertyExpression subExp = new PropertyExpression(varX("{}", types[0].getType()), pexp.getPropertyAsString()); |
| AtomicReference<ClassNode> result = new AtomicReference<>(); |
| if (existsProperty(subExp, true, new PropertyLookupVisitor(result))) { |
| intf = LIST_TYPE.getPlainNodeReference(); |
| ClassNode itemType = result.get(); |
| intf.setGenericsTypes(new GenericsType[]{new GenericsType(wrapTypeIfNecessary(itemType))}); |
| return intf; |
| } |
| return null; |
| } |
| |
| private ClassNode getTypeForMapPropertyExpression(final ClassNode testClass, final ClassNode objectExpressionType, final PropertyExpression pexp) { |
| if (!implementsInterfaceOrIsSubclassOf(testClass, MAP_TYPE)) return null; |
| ClassNode intf; |
| if (objectExpressionType.getGenericsTypes() != null) { |
| intf = GenericsUtils.parameterizeType(objectExpressionType, MAP_TYPE.getPlainNodeReference()); |
| } else { |
| intf = MAP_TYPE.getPlainNodeReference(); |
| } |
| // 0 is the key, 1 is the value |
| GenericsType[] types = intf.getGenericsTypes(); |
| if (types == null || types.length != 2) return OBJECT_TYPE; |
| |
| if (pexp.isSpreadSafe()) { |
| // map*.property syntax |
| // only "key" and "value" are allowed |
| if ("key".equals(pexp.getPropertyAsString())) { |
| ClassNode listKey = LIST_TYPE.getPlainNodeReference(); |
| listKey.setGenericsTypes(new GenericsType[]{types[0]}); |
| return listKey; |
| } else if ("value".equals(pexp.getPropertyAsString())) { |
| ClassNode listValue = LIST_TYPE.getPlainNodeReference(); |
| listValue.setGenericsTypes(new GenericsType[]{types[1]}); |
| return listValue; |
| } else { |
| addStaticTypeError("Spread operator on map only allows one of [key,value]", pexp); |
| } |
| } else { |
| return types[1].getType(); |
| } |
| return null; |
| } |
| |
| /** |
| * This method is used to filter search results in which null means "no match", |
| * to filter out illegal access to instance members from a static context. |
| * <p> |
| * Return null if the given member is not static, but we want to access in |
| * a static way (staticOnly=true). If we want to access in a non-static way |
| * we always return the member, since then access to static members and |
| * non-static members is allowed. |
| */ |
| @SuppressWarnings("unchecked") |
| private <T> T allowStaticAccessToMember(final T member, final boolean staticOnly) { |
| if (member == null) return null; |
| if (!staticOnly) return member; |
| boolean isStatic; |
| if (member instanceof Variable) { |
| Variable v = (Variable) member; |
| isStatic = Modifier.isStatic(v.getModifiers()); |
| } else if (member instanceof List) { |
| List<MethodNode> list = (List<MethodNode>) member; |
| if (list.size() == 1) { |
| return (T) Collections.singletonList(allowStaticAccessToMember(list.get(0), staticOnly)); |
| } |
| return (T) Collections.emptyList(); |
| } else { |
| MethodNode mn = (MethodNode) member; |
| isStatic = mn.isStatic(); |
| } |
| if (staticOnly && !isStatic) return null; |
| return member; |
| } |
| |
| private void storeWithResolve(final ClassNode typeToResolve, final ClassNode receiver, final ClassNode declaringClass, final boolean isStatic, final PropertyExpression expressionToStoreOn) { |
| ClassNode type = typeToResolve; |
| if (getGenericsWithoutArray(type) != null) { |
| Map<GenericsTypeName, GenericsType> resolvedPlaceholders = resolvePlaceHoldersFromDeclaration(receiver, declaringClass, null, isStatic); |
| type = resolveGenericsWithContext(resolvedPlaceholders, type); |
| } |
| storeInferredTypeForPropertyExpression(expressionToStoreOn, type); |
| storeType(expressionToStoreOn, type); |
| } |
| |
| private boolean storeField(final FieldNode field, final PropertyExpression expressionToStoreOn, final ClassNode receiver, final ClassCodeVisitorSupport visitor, final String delegationData, final boolean lhsOfAssignment) { |
| if (visitor != null) visitor.visitField(field); |
| checkOrMarkPrivateAccess(expressionToStoreOn, field, lhsOfAssignment); |
| storeWithResolve(field.getOriginType(), receiver, field.getDeclaringClass(), field.isStatic(), expressionToStoreOn); |
| if (delegationData != null) { |
| expressionToStoreOn.putNodeMetaData(IMPLICIT_RECEIVER, delegationData); |
| } |
| return true; |
| } |
| |
| private boolean storeProperty(final PropertyNode property, final PropertyExpression expressionToStoreOn, final ClassNode receiver, final ClassCodeVisitorSupport visitor, final String delegationData) { |
| if (visitor != null) visitor.visitProperty(property); |
| storeWithResolve(property.getOriginType(), receiver, property.getDeclaringClass(), property.isStatic(), expressionToStoreOn); |
| if (delegationData != null) { |
| expressionToStoreOn.putNodeMetaData(IMPLICIT_RECEIVER, delegationData); |
| } |
| return true; |
| } |
| |
| protected void storeInferredTypeForPropertyExpression(final PropertyExpression pexp, final ClassNode flatInferredType) { |
| if (pexp.isSpreadSafe()) { |
| ClassNode list = LIST_TYPE.getPlainNodeReference(); |
| list.setGenericsTypes(new GenericsType[]{new GenericsType(flatInferredType)}); |
| storeType(pexp, list); |
| } else { |
| storeType(pexp, flatInferredType); |
| } |
| } |
| |
| @Override |
| public void visitProperty(final PropertyNode node) { |
| boolean osc = typeCheckingContext.isInStaticContext; |
| try { |
| typeCheckingContext.isInStaticContext = node.isInStaticContext(); |
| currentProperty = node; |
| super.visitProperty(node); |
| } finally { |
| currentProperty = null; |
| typeCheckingContext.isInStaticContext = osc; |
| } |
| } |
| |
| @Override |
| public void visitField(final FieldNode node) { |
| boolean osc = typeCheckingContext.isInStaticContext; |
| try { |
| typeCheckingContext.isInStaticContext = node.isInStaticContext(); |
| currentField = node; |
| super.visitField(node); |
| Expression init = node.getInitialExpression(); |
| if (init != null) { |
| FieldExpression left = new FieldExpression(node); |
| BinaryExpression bexp = binX( |
| left, |
| Token.newSymbol("=", node.getLineNumber(), node.getColumnNumber()), |
| init |
| ); |
| bexp.setSourcePosition(init); |
| typeCheckAssignment(bexp, left, node.getOriginType(), init, getType(init)); |
| if (init instanceof ConstructorCallExpression) { |
| inferDiamondType((ConstructorCallExpression) init, node.getOriginType()); |
| } |
| } |
| } finally { |
| currentField = null; |
| typeCheckingContext.isInStaticContext = osc; |
| } |
| } |
| |
| @Override |
| public void visitForLoop(final ForStatement forLoop) { |
| // collect every variable expression used in the loop body |
| Map<VariableExpression, ClassNode> varOrigType = new HashMap<>(); |
| forLoop.getLoopBlock().visit(new VariableExpressionTypeMemoizer(varOrigType)); |
| |
| // visit body |
| Map<VariableExpression, List<ClassNode>> oldTracker = pushAssignmentTracking(); |
| Expression collectionExpression = forLoop.getCollectionExpression(); |
| if (collectionExpression instanceof ClosureListExpression) { |
| // for (int i=0; i<...; i++) style loop |
| super.visitForLoop(forLoop); |
| } else { |
| collectionExpression.visit(this); |
| ClassNode collectionType = getType(collectionExpression); |
| ClassNode forLoopVariableType = forLoop.getVariableType(); |
| ClassNode componentType; |
| if (Character_TYPE.equals(getWrapper(forLoopVariableType)) && STRING_TYPE.equals(collectionType)) { |
| // we allow auto-coercion here |
| componentType = forLoopVariableType; |
| } else { |
| componentType = inferLoopElementType(collectionType); |
| } |
| if (getUnwrapper(componentType) == forLoopVariableType) { |
| // prefer primitive type over boxed type |
| componentType = forLoopVariableType; |
| } |
| if (!checkCompatibleAssignmentTypes(forLoopVariableType, componentType)) { |
| addStaticTypeError("Cannot loop with element of type " + forLoopVariableType.toString(false) + " with collection of type " + collectionType.toString(false), forLoop); |
| } |
| if (forLoopVariableType != DYNAMIC_TYPE) { |
| // user has specified a type, prefer it over the inferred type |
| componentType = forLoopVariableType; |
| } |
| typeCheckingContext.controlStructureVariables.put(forLoop.getVariable(), componentType); |
| try { |
| super.visitForLoop(forLoop); |
| } finally { |
| typeCheckingContext.controlStructureVariables.remove(forLoop.getVariable()); |
| } |
| } |
| boolean typeChanged = isSecondPassNeededForControlStructure(varOrigType, oldTracker); |
| if (typeChanged) visitForLoop(forLoop); |
| } |
| |
| /** |
| * Given a loop collection type, returns the inferred type of the loop element. Used, for |
| * example, to infer the element type of a (for e in list) loop. |
| * |
| * @param collectionType the type of the collection |
| * @return the inferred component type |
| */ |
| public static ClassNode inferLoopElementType(final ClassNode collectionType) { |
| ClassNode componentType = collectionType.getComponentType(); |
| if (componentType == null) { |
| if (implementsInterfaceOrIsSubclassOf(collectionType, ITERABLE_TYPE)) { |
| ClassNode intf = GenericsUtils.parameterizeType(collectionType, ITERABLE_TYPE); |
| GenericsType[] genericsTypes = intf.getGenericsTypes(); |
| componentType = genericsTypes[0].getType(); |
| } else if (implementsInterfaceOrIsSubclassOf(collectionType, MAP_TYPE)) { |
| // GROOVY-6240 |
| ClassNode intf = GenericsUtils.parameterizeType(collectionType, MAP_TYPE); |
| GenericsType[] genericsTypes = intf.getGenericsTypes(); |
| componentType = MAP_ENTRY_TYPE.getPlainNodeReference(); |
| componentType.setGenericsTypes(genericsTypes); |
| } else if (STRING_TYPE.equals(collectionType)) { |
| componentType = STRING_TYPE; |
| } else if (ENUMERATION_TYPE.equals(collectionType)) { |
| // GROOVY-6123 |
| ClassNode intf = GenericsUtils.parameterizeType(collectionType, ENUMERATION_TYPE); |
| GenericsType[] genericsTypes = intf.getGenericsTypes(); |
| componentType = genericsTypes[0].getType(); |
| } else { |
| componentType = OBJECT_TYPE; |
| } |
| } |
| return componentType; |
| } |
| |
| protected boolean isSecondPassNeededForControlStructure(final Map<VariableExpression, ClassNode> varOrigType, final Map<VariableExpression, List<ClassNode>> oldTracker) { |
| Map<VariableExpression, ClassNode> assignedVars = popAssignmentTracking(oldTracker); |
| for (Map.Entry<VariableExpression, ClassNode> entry : assignedVars.entrySet()) { |
| Variable key = findTargetVariable(entry.getKey()); |
| if (key instanceof VariableExpression) { |
| ClassNode origType = varOrigType.get(key); |
| ClassNode newType = entry.getValue(); |
| if (varOrigType.containsKey(key) && (!newType.equals(origType))) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public void visitWhileLoop(final WhileStatement loop) { |
| Map<VariableExpression, List<ClassNode>> oldTracker = pushAssignmentTracking(); |
| super.visitWhileLoop(loop); |
| popAssignmentTracking(oldTracker); |
| } |
| |
| @Override |
| public void visitBitwiseNegationExpression(final BitwiseNegationExpression expression) { |
| super.visitBitwiseNegationExpression(expression); |
| ClassNode type = getType(expression); |
| ClassNode typeRe = type.redirect(); |
| ClassNode resultType; |
| if (isBigIntCategory(typeRe)) { |
| // allow any internal number that is not a floating point one |
| resultType = type; |
| } else if (typeRe == STRING_TYPE || typeRe == GSTRING_TYPE) { |
| resultType = PATTERN_TYPE; |
| } else if (typeRe == ArrayList_TYPE) { |
| resultType = ArrayList_TYPE; |
| } else if (typeRe.equals(PATTERN_TYPE)) { |
| resultType = PATTERN_TYPE; |
| } else { |
| MethodNode mn = findMethodOrFail(expression, type, "bitwiseNegate"); |
| if (mn != null) { |
| resultType = mn.getReturnType(); |
| } else { |
| resultType = OBJECT_TYPE; |
| } |
| } |
| storeType(expression, resultType); |
| } |
| |
| @Override |
| public void visitUnaryPlusExpression(final UnaryPlusExpression expression) { |
| super.visitUnaryPlusExpression(expression); |
| negativeOrPositiveUnary(expression, "positive"); |
| } |
| |
| @Override |
| public void visitUnaryMinusExpression(final UnaryMinusExpression expression) { |
| super.visitUnaryMinusExpression(expression); |
| negativeOrPositiveUnary(expression, "negative"); |
| } |
| |
| @Override |
| public void visitPostfixExpression(final PostfixExpression expression) { |
| Expression operand = expression.getExpression(); |
| int operator = expression.getOperation().getType(); |
| visitPrefixOrPostifExpression(expression, operand, operator); |
| } |
| |
| @Override |
| public void visitPrefixExpression(final PrefixExpression expression) { |
| Expression operand = expression.getExpression(); |
| int operator = expression.getOperation().getType(); |
| visitPrefixOrPostifExpression(expression, operand, operator); |
| } |
| |
| private void visitPrefixOrPostifExpression(final Expression origin, final Expression operand, final int operator) { |
| Optional<Token> token = TokenUtil.asAssignment(operator); |
| if (token.isPresent()) { // push "operand += 1" or "operand -= 1" onto stack for LHS checks |
| typeCheckingContext.pushEnclosingBinaryExpression(binX(operand, token.get(), constX(1))); |
| } |
| try { |
| operand.visit(this); |
| ClassNode operandType = getType(operand); |
| boolean isPostfix = (origin instanceof PostfixExpression); |
| String name = (operator == PLUS_PLUS ? "next" : operator == MINUS_MINUS ? "previous" : null); |
| |
| if (name != null && isNumberType(operandType)) { |
| if (!isPrimitiveType(operandType)) { |
| MethodNode node = findMethodOrFail(varX("_dummy_", operandType), operandType, name); |
| if (node != null) { |
| storeTargetMethod(origin, node); |
| storeType(origin, isPostfix ? operandType : getMathWideningClassNode(operandType)); |
| return; |
| } |
| } |
| storeType(origin, operandType); |
| return; |
| } |
| if (name != null && operandType.isDerivedFrom(Number_TYPE)) { |
| // special case for numbers, improve type checking as we can expect ++ and -- to return the same type |
| MethodNode node = findMethodOrFail(operand, operandType, name); |
| if (node != null) { |
| storeTargetMethod(origin, node); |
| storeType(origin, getMathWideningClassNode(operandType)); |
| return; |
| } |
| } |
| if (name == null) { |
| addUnsupportedPreOrPostfixExpressionError(origin); |
| return; |
| } |
| |
| MethodNode node = findMethodOrFail(operand, operandType, name); |
| if (node != null) { |
| storeTargetMethod(origin, node); |
| storeType(origin, isPostfix ? operandType : inferReturnTypeGenerics(operandType, node, ArgumentListExpression.EMPTY_ARGUMENTS)); |
| } |
| } finally { |
| if (token.isPresent()) typeCheckingContext.popEnclosingBinaryExpression(); |
| } |
| } |
| |
| private static ClassNode getMathWideningClassNode(final ClassNode type) { |
| if (byte_TYPE.equals(type) || short_TYPE.equals(type) || int_TYPE.equals(type)) { |
| return int_TYPE; |
| } |
| if (Byte_TYPE.equals(type) || Short_TYPE.equals(type) || Integer_TYPE.equals(type)) { |
| return Integer_TYPE; |
| } |
| if (float_TYPE.equals(type)) { |
| return double_TYPE; |
| } |
| if (Float_TYPE.equals(type)) { |
| return Double_TYPE; |
| } |
| return type; |
| } |
| |
| private void negativeOrPositiveUnary(final Expression expression, final String name) { |
| ClassNode type = getType(expression); |
| ClassNode typeRe = type.redirect(); |
| ClassNode resultType; |
| if (isDoubleCategory(getUnwrapper(typeRe))) { |
| resultType = type; |
| } else if (typeRe == ArrayList_TYPE) { |
| resultType = ArrayList_TYPE; |
| } else { |
| MethodNode mn = findMethodOrFail(expression, type, name); |
| if (mn != null) { |
| resultType = mn.getReturnType(); |
| } else { |
| resultType = type; |
| } |
| } |
| storeType(expression, resultType); |
| } |
| |
| @Override |
| protected void visitConstructorOrMethod(final MethodNode node, final boolean isConstructor) { |
| typeCheckingContext.pushEnclosingMethod(node); |
| if (!isSkipMode(node) && !shouldSkipMethodNode(node)) { |
| super.visitConstructorOrMethod(node, isConstructor); |
| } |
| if (!isConstructor) { |
| returnAdder.visitMethod(node); // return statement added after visitConstructorOrMethod finished... we can not count these auto-generated return statements(GROOVY-7753), see `typeCheckingContext.pushEnclosingReturnStatement` |
| } |
| typeCheckingContext.popEnclosingMethod(); |
| } |
| |
| @Override |
| public void visitExpressionStatement(final ExpressionStatement statement) { |
| typeCheckingContext.pushTemporaryTypeInfo(); |
| super.visitExpressionStatement(statement); |
| typeCheckingContext.popTemporaryTypeInfo(); |
| } |
| |
| @Override |
| public void visitReturnStatement(final ReturnStatement statement) { |
| super.visitReturnStatement(statement); |
| returnListener.returnStatementAdded(statement); |
| } |
| |
| private ClassNode infer(final ClassNode target, final ClassNode source) { |
| DeclarationExpression virtualDecl = new DeclarationExpression( |
| varX("{target}", target), |
| Token.newSymbol(EQUAL, -1, -1), |
| varX("{source}", source) |
| ); |
| virtualDecl.visit(this); |
| ClassNode newlyInferred = virtualDecl.getNodeMetaData(INFERRED_TYPE); |
| |
| return !missesGenericsTypes(newlyInferred) ? newlyInferred : null; |
| } |
| |
| protected ClassNode checkReturnType(final ReturnStatement statement) { |
| Expression expression = statement.getExpression(); |
| ClassNode type = getType(expression); |
| |
| if (typeCheckingContext.getEnclosingClosure() != null) { |
| return type; |
| } |
| // handle instanceof cases |
| if ((expression instanceof VariableExpression) && hasInferredReturnType(expression)) { |
| type = expression.getNodeMetaData(INFERRED_RETURN_TYPE); |
| } |
| MethodNode enclosingMethod = typeCheckingContext.getEnclosingMethod(); |
| if (enclosingMethod != null && typeCheckingContext.getEnclosingClosure() == null) { |
| if (!enclosingMethod.isVoidMethod() |
| && !type.equals(void_WRAPPER_TYPE) |
| && !type.equals(VOID_TYPE) |
| && !checkCompatibleAssignmentTypes(enclosingMethod.getReturnType(), type, null, false) |
| && !(isNullConstant(expression))) { |
| if (!extension.handleIncompatibleReturnType(statement, type)) { |
| addStaticTypeError("Cannot return value of type " + type.toString(false) + " on method returning type " + enclosingMethod.getReturnType().toString(false), expression); |
| } |
| } else if (!enclosingMethod.isVoidMethod()) { |
| ClassNode previousType = getInferredReturnType(enclosingMethod); |
| ClassNode inferred = previousType == null ? type : lowestUpperBound(type, previousType); |
| if (implementsInterfaceOrIsSubclassOf(inferred, enclosingMethod.getReturnType())) { |
| if (missesGenericsTypes(inferred)) { |
| ClassNode newlyInferred = infer(enclosingMethod.getReturnType(), type); |
| if (newlyInferred != null) { |
| type = newlyInferred; |
| } |
| } else { |
| checkTypeGenerics(enclosingMethod.getReturnType(), inferred, expression); |
| } |
| return type; |
| } else { |
| return enclosingMethod.getReturnType(); |
| } |
| } |
| } |
| return type; |
| } |
| |
| protected void addClosureReturnType(final ClassNode returnType) { |
| typeCheckingContext.getEnclosingClosure().addReturnType(returnType); |
| } |
| |
| @Override |
| public void visitConstructorCallExpression(final ConstructorCallExpression call) { |
| super.visitConstructorCallExpression(call); |
| if (extension.beforeMethodCall(call)) { |
| extension.afterMethodCall(call); |
| return; |
| } |
| ClassNode receiver = call.isThisCall() ? typeCheckingContext.getEnclosingClassNode() : |
| call.isSuperCall() ? typeCheckingContext.getEnclosingClassNode().getSuperClass() : call.getType(); |
| Expression arguments = call.getArguments(); |
| |
| ArgumentListExpression argumentList = InvocationWriter.makeArgumentList(arguments); |
| |
| checkForbiddenSpreadArgument(argumentList); |
| |
| ClassNode[] args = getArgumentTypes(argumentList); |
| if (args.length > 0 && |
| typeCheckingContext.getEnclosingClosure() != null && |
| isThisExpression(argumentList.getExpression(0)) && |
| args[0].equals(call.getType().getOuterClass()) && |
| !call.getType().isStaticClass()) { |
| args[0] = CLOSURE_TYPE; |
| } |
| |
| MethodNode node; |
| if (looksLikeNamedArgConstructor(receiver, args) |
| && findMethod(receiver, "<init>", DefaultGroovyMethods.init(args)).size() == 1 |
| && findMethod(receiver, "<init>", args).isEmpty()) { |
| // bean-style constructor |
| node = typeCheckMapConstructor(call, receiver, arguments); |
| if (node != null) { |
| storeTargetMethod(call, node); |
| extension.afterMethodCall(call); |
| return; |
| } |
| } |
| node = findMethodOrFail(call, receiver, "<init>", args); |
| if (node != null) { |
| if (looksLikeNamedArgConstructor(receiver, args) && node.getParameters().length + 1 == args.length) { |
| node = typeCheckMapConstructor(call, receiver, arguments); |
| } else { |
| typeCheckMethodsWithGenericsOrFail(receiver, args, node, call); |
| } |
| if (node != null) storeTargetMethod(call, node); |
| } |
| extension.afterMethodCall(call); |
| } |
| |
| private boolean looksLikeNamedArgConstructor(final ClassNode receiver, final ClassNode[] args) { |
| return (args.length == 1 || args.length == 2 && isInnerConstructor(receiver, args[0])) |
| && implementsInterfaceOrIsSubclassOf(args[args.length - 1], MAP_TYPE); |
| } |
| |
| private boolean isInnerConstructor(final ClassNode receiver, final ClassNode parent) { |
| return receiver.isRedirectNode() && receiver.redirect() instanceof InnerClassNode && |
| receiver.redirect().getOuterClass().equals(parent); |
| } |
| |
| protected MethodNode typeCheckMapConstructor(final ConstructorCallExpression call, final ClassNode receiver, final Expression arguments) { |
| MethodNode node = null; |
| if (arguments instanceof TupleExpression) { |
| TupleExpression texp = (TupleExpression) arguments; |
| List<Expression> expressions = texp.getExpressions(); |
| // should only get here with size = 2 when inner class constructor |
| if (expressions.size() == 1 || expressions.size() == 2) { |
| Expression expression = expressions.get(expressions.size() - 1); |
| if (expression instanceof MapExpression) { |
| MapExpression argList = (MapExpression) expression; |
| checkGroovyConstructorMap(call, receiver, argList); |
| Parameter[] params = expressions.size() == 1 |
| ? new Parameter[]{new Parameter(MAP_TYPE, "map")} |
| : new Parameter[]{new Parameter(receiver.redirect().getOuterClass(), "$p$"), new Parameter(MAP_TYPE, "map")}; |
| node = new ConstructorNode(Opcodes.ACC_PUBLIC, params, ClassNode.EMPTY_ARRAY, GENERATED_EMPTY_STATEMENT); |
| node.setDeclaringClass(receiver); |
| } |
| } |
| } |
| return node; |
| } |
| |
| protected ClassNode[] getArgumentTypes(final ArgumentListExpression args) { |
| return args.getExpressions().stream().map(exp -> |
| isNullConstant(exp) ? UNKNOWN_PARAMETER_TYPE : getInferredTypeFromTempInfo(exp, getType(exp)) |
| ).toArray(ClassNode[]::new); |
| } |
| |
| private ClassNode getInferredTypeFromTempInfo(final Expression exp, ClassNode result) { |
| if (exp instanceof VariableExpression && !typeCheckingContext.temporaryIfBranchTypeInformation.empty()) { |
| List<ClassNode> classNodes = getTemporaryTypesForExpression(exp); |
| if (classNodes != null && !classNodes.isEmpty()) { |
| List<ClassNode> types = new ArrayList<>(classNodes.size() + 1); |
| if (result != null && !classNodes.contains(result)) types.add(result); |
| types.addAll(classNodes); |
| // GROOVY-7333: filter out Object |
| types.removeIf(OBJECT_TYPE::equals); |
| |
| if (types.isEmpty()) { |
| result = OBJECT_TYPE.getPlainNodeReference(); |
| } else if (types.size() == 1) { |
| result = types.get(0); |
| } else { |
| result = new UnionTypeClassNode(types.toArray(ClassNode.EMPTY_ARRAY)); |
| } |
| } |
| } |
| return result; |
| } |
| |
| @Override |
| public void visitClosureExpression(final ClosureExpression expression) { |
| boolean oldStaticContext = typeCheckingContext.isInStaticContext; |
| typeCheckingContext.isInStaticContext = false; |
| |
| // collect every variable expression used in the loop body |
| Map<VariableExpression, ClassNode> varOrigType = new HashMap<>(); |
| Statement code = expression.getCode(); |
| code.visit(new VariableExpressionTypeMemoizer(varOrigType)); |
| Map<VariableExpression, List<ClassNode>> oldTracker = pushAssignmentTracking(); |
| |
| // first, collect closure shared variables and reinitialize types |
| SharedVariableCollector collector = new SharedVariableCollector(getSourceUnit()); |
| collector.visitClosureExpression(expression); |
| Set<VariableExpression> closureSharedExpressions = collector.getClosureSharedExpressions(); |
| Map<VariableExpression, Map<StaticTypesMarker, Object>> typesBeforeVisit = null; |
| if (!closureSharedExpressions.isEmpty()) { |
| typesBeforeVisit = new HashMap<>(); |
| saveVariableExpressionMetadata(closureSharedExpressions, typesBeforeVisit); |
| } |
| |
| // perform visit |
| typeCheckingContext.pushEnclosingClosureExpression(expression); |
| DelegationMetadata dmd = getDelegationMetadata(expression); |
| if (dmd == null) { |
| typeCheckingContext.delegationMetadata = new DelegationMetadata( |
| typeCheckingContext.getEnclosingClassNode(), Closure.OWNER_FIRST, typeCheckingContext.delegationMetadata |
| ); |
| } else { |
| typeCheckingContext.delegationMetadata = new DelegationMetadata( |
| dmd.getType(), |
| dmd.getStrategy(), |
| typeCheckingContext.delegationMetadata |
| ); |
| } |
| super.visitClosureExpression(expression); |
| typeCheckingContext.delegationMetadata = typeCheckingContext.delegationMetadata.getParent(); |
| MethodNode node = new MethodNode("dummy", 0, OBJECT_TYPE, Parameter.EMPTY_ARRAY, ClassNode.EMPTY_ARRAY, code); |
| returnAdder.visitMethod(node); |
| |
| TypeCheckingContext.EnclosingClosure enclosingClosure = typeCheckingContext.getEnclosingClosure(); |
| if (!enclosingClosure.getReturnTypes().isEmpty()) { |
| ClassNode returnType = lowestUpperBound(enclosingClosure.getReturnTypes()); |
| |
| ClassNode expectedReturnType = getInferredReturnType(expression); |
| // type argument can not be of primitive type, we should convert it to the wrapper type |
| if (expectedReturnType != null && isPrimitiveType(returnType) && expectedReturnType.equals(getWrapper(returnType))) { |
| returnType = expectedReturnType; |
| } |
| |
| storeInferredReturnType(expression, returnType); |
| ClassNode inferredType = wrapClosureType(returnType); |
| storeType(enclosingClosure.getClosureExpression(), inferredType); |
| } |
| |
| typeCheckingContext.popEnclosingClosure(); |
| |
| boolean typeChanged = isSecondPassNeededForControlStructure(varOrigType, oldTracker); |
| if (typeChanged) visitClosureExpression(expression); |
| |
| // restore original metadata |
| restoreVariableExpressionMetadata(typesBeforeVisit); |
| typeCheckingContext.isInStaticContext = oldStaticContext; |
| for (Parameter parameter : getParametersSafe(expression)) { |
| typeCheckingContext.controlStructureVariables.remove(parameter); |
| } |
| } |
| |
| private static ClassNode wrapClosureType(final ClassNode returnType) { |
| ClassNode inferredType = CLOSURE_TYPE.getPlainNodeReference(); |
| inferredType.setGenericsTypes(new GenericsType[]{new GenericsType(wrapTypeIfNecessary(returnType))}); |
| return inferredType; |
| } |
| |
| protected DelegationMetadata getDelegationMetadata(final ClosureExpression expression) { |
| return (DelegationMetadata) expression.getNodeMetaData(DELEGATION_METADATA); |
| } |
| |
| protected void restoreVariableExpressionMetadata(final Map<VariableExpression, Map<StaticTypesMarker, Object>> typesBeforeVisit) { |
| if (typesBeforeVisit != null) { |
| for (Map.Entry<VariableExpression, Map<StaticTypesMarker, Object>> entry : typesBeforeVisit.entrySet()) { |
| VariableExpression ve = entry.getKey(); |
| Map<StaticTypesMarker, Object> metadata = entry.getValue(); |
| for (StaticTypesMarker marker : StaticTypesMarker.values()) { |
| ve.removeNodeMetaData(marker); |
| Object value = metadata.get(marker); |
| if (value != null) ve.setNodeMetaData(marker, value); |
| } |
| } |
| } |
| } |
| |
| protected void saveVariableExpressionMetadata(final Set<VariableExpression> closureSharedExpressions, final Map<VariableExpression, Map<StaticTypesMarker, Object>> typesBeforeVisit) { |
| for (VariableExpression ve : closureSharedExpressions) { |
| // GROOVY-6921: We must force a call to getType in order to update closure shared variable whose |
| // types are inferred thanks to closure parameter type inference |
| getType(ve); |
| Map<StaticTypesMarker, Object> metadata = new ListHashMap<>(); |
| for (StaticTypesMarker marker : StaticTypesMarker.values()) { |
| Object value = ve.getNodeMetaData(marker); |
| if (value != null) { |
| metadata.put(marker, value); |
| } |
| } |
| typesBeforeVisit.put(ve, metadata); |
| Variable accessedVariable = ve.getAccessedVariable(); |
| if (accessedVariable != ve && accessedVariable instanceof VariableExpression) { |
| saveVariableExpressionMetadata(Collections.singleton((VariableExpression) accessedVariable), typesBeforeVisit); |
| } |
| } |
| } |
| |
| protected boolean shouldSkipMethodNode(final MethodNode node) { |
| return Boolean.TRUE.equals(node.getNodeMetaData(StaticTypeCheckingVisitor.class)); |
| } |
| |
| @Override |
| public void visitMethod(final MethodNode node) { |
| if (shouldSkipMethodNode(node)) { |
| // method has already been visited by a static type checking visitor |
| return; |
| } |
| if (!extension.beforeVisitMethod(node)) { |
| ErrorCollector collector = node.getNodeMetaData(ERROR_COLLECTOR); |
| if (collector != null) { |
| typeCheckingContext.getErrorCollector().addCollectorContents(collector); |
| } else { |
| startMethodInference(node, typeCheckingContext.getErrorCollector()); |
| } |
| node.removeNodeMetaData(ERROR_COLLECTOR); |
| } |
| extension.afterVisitMethod(node); |
| } |
| |
| @Override |
| public void visitConstructor(final ConstructorNode node) { |
| if (shouldSkipMethodNode(node)) { |
| // method has already been visited by a static type checking visitor |
| return; |
| } |
| for (Parameter parameter : node.getParameters()) { |
| if (parameter.getInitialExpression() != null) { |
| parameter.getInitialExpression().visit(this); |
| } |
| } |
| super.visitConstructor(node); |
| } |
| |
| protected void startMethodInference(final MethodNode node, final ErrorCollector collector) { |
| if (isSkipMode(node)) return; |
| |
| // second, we must ensure that this method MUST be statically checked |
| // for example, in a mixed mode where only some methods are statically checked |
| // we must not visit a method which used dynamic dispatch. |
| // We do not check for an annotation because some other AST transformations |
| // may use this visitor without the annotation being explicitly set |
| if (!typeCheckingContext.methodsToBeVisited.isEmpty() && !typeCheckingContext.methodsToBeVisited.contains(node)) |
| return; |
| |
| // alreadyVisitedMethods prevents from visiting the same method multiple times |
| // and prevents from infinite loops |
| if (typeCheckingContext.alreadyVisitedMethods.contains(node)) return; |
| typeCheckingContext.alreadyVisitedMethods.add(node); |
| |
| typeCheckingContext.pushErrorCollector(collector); |
| |
| boolean osc = typeCheckingContext.isInStaticContext; |
| try { |
| typeCheckingContext.isInStaticContext = node.isStatic(); |
| super.visitMethod(node); |
| for (Parameter parameter : node.getParameters()) { |
| if (parameter.getInitialExpression() != null) { |
| parameter.getInitialExpression().visit(this); |
| } |
| } |
| /* |
| ClassNode rtype = getInferredReturnType(node); |
| if (rtype == null) { |
| storeInferredReturnType(node, node.getReturnType()); |
| } |
| addTypeCheckingInfoAnnotation(node); |
| */ |
| } finally { |
| typeCheckingContext.isInStaticContext = osc; |
| } |
| |
| typeCheckingContext.popErrorCollector(); |
| node.putNodeMetaData(ERROR_COLLECTOR, collector); |
| } |
| |
| protected void addTypeCheckingInfoAnnotation(final MethodNode node) { |
| // TypeChecked$TypeCheckingInfo can not be applied on constructors |
| if (node instanceof ConstructorNode) return; |
| |
| // if a returned inferred type is available and no @TypeCheckingInfo is on node, then add an |
| // annotation to the method node |
| ClassNode rtype = getInferredReturnType(node); |
| if (rtype != null && node.getAnnotations(TYPECHECKING_INFO_NODE).isEmpty()) { |
| AnnotationNode anno = new AnnotationNode(TYPECHECKING_INFO_NODE); |
| anno.setMember("version", CURRENT_SIGNATURE_PROTOCOL); |
| SignatureCodec codec = SignatureCodecFactory.getCodec(CURRENT_SIGNATURE_PROTOCOL_VERSION, getTransformLoader()); |
| String genericsSignature = codec.encode(rtype); |
| if (genericsSignature != null) { |
| ConstantExpression signature = new ConstantExpression(genericsSignature); |
| signature.setType(STRING_TYPE); |
| anno.setMember("inferredType", signature); |
| node.addAnnotation(anno); |
| } |
| } |
| } |
| |
| @Override |
| public void visitStaticMethodCallExpression(final StaticMethodCallExpression call) { |
| String name = call.getMethod(); |
| if (name == null) { |
| addStaticTypeError("cannot resolve dynamic method name at compile time.", call); |
| return; |
| } |
| |
| if (extension.beforeMethodCall(call)) { |
| extension.afterMethodCall(call); |
| return; |
| } |
| |
| Expression callArguments = call.getArguments(); |
| |
| ArgumentListExpression argumentList = InvocationWriter.makeArgumentList(callArguments); |
| |
| checkForbiddenSpreadArgument(argumentList); |
| |
| ClassNode receiver = call.getOwnerType(); |
| visitMethodCallArguments(receiver, argumentList, false, null); |
| |
| ClassNode[] args = getArgumentTypes(argumentList); |
| |
| try { |
| |
| // method call receivers are : |
| // - possible "with" receivers |
| // - the actual receiver as found in the method call expression |
| // - any of the potential receivers found in the instanceof temporary table |
| // in that order |
| List<Receiver<String>> receivers = new LinkedList<>(); |
| addReceivers(receivers, makeOwnerList(new ClassExpression(receiver)), false); |
| List<MethodNode> mn = null; |
| Receiver<String> chosenReceiver = null; |
| for (Receiver<String> currentReceiver : receivers) { |
| mn = findMethod(currentReceiver.getType(), name, args); |
| if (!mn.isEmpty()) { |
| if (mn.size() == 1) |
| typeCheckMethodsWithGenericsOrFail(currentReceiver.getType(), args, mn.get(0), call); |
| chosenReceiver = currentReceiver; |
| break; |
| } |
| } |
| if (mn.isEmpty()) { |
| mn = extension.handleMissingMethod(receiver, name, argumentList, args, call); |
| } |
| boolean callArgsVisited = false; |
| if (mn.isEmpty()) { |
| addNoMatchingMethodError(receiver, name, args, call); |
| } else { |
| mn = disambiguateMethods(mn, receiver, args, call); |
| if (mn.size() == 1) { |
| MethodNode directMethodCallCandidate = mn.get(0); |
| ClassNode returnType = getType(directMethodCallCandidate); |
| if (returnType.isUsingGenerics() && !returnType.isEnum()) { |
| visitMethodCallArguments(receiver, argumentList, true, directMethodCallCandidate); |
| ClassNode irtg = inferReturnTypeGenerics(chosenReceiver.getType(), directMethodCallCandidate, callArguments); |
| returnType = irtg != null && implementsInterfaceOrIsSubclassOf(irtg, returnType) ? irtg : returnType; |
| callArgsVisited = true; |
| } |
| storeType(call, returnType); |
| storeTargetMethod(call, directMethodCallCandidate); |
| |
| } else { |
| addAmbiguousErrorMessage(mn, name, args, call); |
| } |
| if (!callArgsVisited) { |
| visitMethodCallArguments(receiver, argumentList, true, call.getNodeMetaData(DIRECT_METHOD_CALL_TARGET)); |
| } |
| } |
| } finally { |
| extension.afterMethodCall(call); |
| } |
| } |
| |
| /** |
| * @deprecated this method is unused, replaced with {@link DelegatesTo} inference. |
| */ |
| @Deprecated |
| protected void checkClosureParameters(final Expression callArguments, final ClassNode receiver) { |
| if (callArguments instanceof ArgumentListExpression) { |
| ArgumentListExpression argList = (ArgumentListExpression) callArguments; |
| ClosureExpression closure = (ClosureExpression) argList.getExpression(0); |
| Parameter[] parameters = closure.getParameters(); |
| if (parameters.length > 1) { |
| addStaticTypeError("Unexpected number of parameters for a with call", argList); |
| } else if (parameters.length == 1) { |
| Parameter param = parameters[0]; |
| if (!param.isDynamicTyped() && !isAssignableTo(receiver, param.getType().redirect())) { |
| addStaticTypeError("Expected parameter type: " + receiver.toString(false) + " but was: " + param.getType().redirect().toString(false), param); |
| } |
| } |
| closure.putNodeMetaData(DELEGATION_METADATA, new DelegationMetadata( |
| receiver, |
| Closure.DELEGATE_FIRST, |
| typeCheckingContext.delegationMetadata |
| )); |
| } |
| } |
| |
| /** |
| * Visits a method call target, to infer the type. Don't report errors right |
| * away, that will be done by a later visitMethod call. |
| */ |
| protected void silentlyVisitMethodNode(final MethodNode directMethodCallCandidate) { |
| // visit is authorized because the classnode belongs to the same source unit |
| ErrorCollector collector = new ErrorCollector(typeCheckingContext.getErrorCollector().getConfiguration()); |
| startMethodInference(directMethodCallCandidate, collector); |
| } |
| |
| protected void visitMethodCallArguments(final ClassNode receiver, final ArgumentListExpression arguments, final boolean visitClosures, final MethodNode selectedMethod) { |
| Parameter[] params = selectedMethod != null ? selectedMethod.getParameters() : Parameter.EMPTY_ARRAY; |
| List<Expression> expressions = new LinkedList<>(arguments.getExpressions()); |
| if (selectedMethod instanceof ExtensionMethodNode) { |
| params = ((ExtensionMethodNode) selectedMethod).getExtensionMethodNode().getParameters(); |
| expressions.add(0, varX("$self", receiver)); |
| } |
| ArgumentListExpression newArgs = args(expressions); |
| |
| for (int i = 0, expressionsSize = expressions.size(); i < expressionsSize; i++) { |
| Expression expression = expressions.get(i); |
| if (visitClosures && expression instanceof ClosureExpression |
| || !visitClosures && !(expression instanceof ClosureExpression)) { |
| if (i < params.length && visitClosures) { |
| Parameter param = params[i]; |
| checkClosureWithDelegatesTo(receiver, selectedMethod, newArgs, params, expression, param); |
| if (selectedMethod instanceof ExtensionMethodNode) { |
| if (i > 0) { |
| inferClosureParameterTypes(receiver, arguments, (ClosureExpression) expression, param, selectedMethod); |
| } |
| } else { |
| inferClosureParameterTypes(receiver, newArgs, (ClosureExpression) expression, param, selectedMethod); |
| } |
| } |
| expression.visit(this); |
| if (expression.getNodeMetaData(DELEGATION_METADATA) != null) { |
| expression.removeNodeMetaData(DELEGATION_METADATA); |
| } |
| } |
| } |
| if (expressions.size() > 0 && expressions.get(0) instanceof MapExpression && params.length > 0) { |
| checkNamedParamsAnnotation(params[0], (MapExpression) expressions.get(0)); |
| } |
| } |
| |
| private void checkNamedParamsAnnotation(final Parameter param, final MapExpression args) { |
| if (!isOrImplements(param.getType(), MAP_TYPE)) return; |
| List<MapEntryExpression> entryExpressions = args.getMapEntryExpressions(); |
| Map<Object, Expression> entries = new LinkedHashMap<>(); |
| for (MapEntryExpression entry : entryExpressions) { |
| Object key = entry.getKeyExpression(); |
| if (key instanceof ConstantExpression) { |
| key = ((ConstantExpression) key).getValue(); |
| } |
| entries.put(key, entry.getValueExpression()); |
| } |
| List<AnnotationNode> annotations = param.getAnnotations(NAMED_PARAMS_CLASSNODE); |
| if (annotations != null && !annotations.isEmpty()) { |
| AnnotationNode an = null; |
| for (AnnotationNode next : annotations) { |
| if (next.getClassNode().getName().equals(NamedParams.class.getName())) { |
| an = next; |
| } |
| } |
| List<String> collectedNames = new ArrayList<>(); |
| if (an != null) { |
| Expression value = an.getMember("value"); |
| if (value instanceof AnnotationConstantExpression) { |
| processNamedParam((AnnotationConstantExpression) value, entries, args, collectedNames); |
| } else if (value instanceof ListExpression) { |
| ListExpression le = (ListExpression) value; |
| for (Expression next : le.getExpressions()) { |
| if (next instanceof AnnotationConstantExpression) { |
| processNamedParam((AnnotationConstantExpression) next, entries, args, collectedNames); |
| } |
| } |
| } |
| for (Map.Entry<Object, Expression> entry : entries.entrySet()) { |
| if (!collectedNames.contains(entry.getKey())) { |
| addStaticTypeError("unexpected named arg: " + entry.getKey(), args); |
| } |
| } |
| } |
| } |
| } |
| |
| private void processNamedParam(final AnnotationConstantExpression value, final Map<Object, Expression> entries, final Expression expression, final List<String> collectedNames) { |
| AnnotationNode namedParam = (AnnotationNode) value.getValue(); |
| if (!namedParam.getClassNode().getName().equals(NamedParam.class.getName())) return; |
| String name = null; |
| boolean required = false; |
| ClassNode expectedType = null; |
| ConstantExpression constX = (ConstantExpression) namedParam.getMember("value"); |
| if (constX != null) { |
| name = (String) constX.getValue(); |
| collectedNames.add(name); |
| } |
| constX = (ConstantExpression) namedParam.getMember("required"); |
| if (constX != null) { |
| required = (Boolean) constX.getValue(); |
| } |
| ClassExpression typeX = (ClassExpression) namedParam.getMember("type"); |
| if (typeX != null) { |
| expectedType = typeX.getType(); |
| } |
| if (!entries.containsKey(name)) { |
| if (required) { |
| addStaticTypeError("required named arg '" + name + "' not found.", expression); |
| } |
| } else { |
| Expression supplied = entries.get(name); |
| if (isCompatibleType(expectedType, expectedType != null, supplied.getType())) { |
| addStaticTypeError("parameter for named arg '" + name + "' has type '" + prettyPrintType(supplied.getType()) + |
| "' but expected '" + prettyPrintType(expectedType) + "'.", expression); |
| } |
| } |
| } |
| |
| private boolean isCompatibleType(final ClassNode expectedType, final boolean b, final ClassNode type) { |
| return b && !isAssignableTo(type, expectedType); |
| } |
| |
| /** |
| * This method is responsible for performing type inference on closure argument types whenever code like this is |
| * found: <code>foo.collect { it.toUpperCase() }</code>. |
| * In this case, the type checker tries to find if the <code>collect</code> method has its {@link Closure} argument |
| * annotated with {@link groovy.transform.stc.ClosureParams}. If yes, then additional type inference can be performed |
| * and the type of <code>it</code> may be inferred. |
| * |
| * @param receiver |
| * @param arguments |
| * @param expression a closure expression for which the argument types should be inferred |
| * @param param the parameter where to look for a {@link groovy.transform.stc.ClosureParams} annotation. |
| * @param selectedMethod the method accepting a closure |
| */ |
| protected void inferClosureParameterTypes(final ClassNode receiver, final Expression arguments, final ClosureExpression expression, final Parameter param, final MethodNode selectedMethod) { |
| List<AnnotationNode> annotations = param.getAnnotations(CLOSUREPARAMS_CLASSNODE); |
| if (annotations != null && !annotations.isEmpty()) { |
| for (AnnotationNode annotation : annotations) { |
| Expression hintClass = annotation.getMember("value"); |
| Expression options = annotation.getMember("options"); |
| Expression resolverClass = annotation.getMember("conflictResolutionStrategy"); |
| if (hintClass instanceof ClassExpression) { |
| doInferClosureParameterTypes(receiver, arguments, expression, selectedMethod, hintClass, resolverClass, options); |
| } |
| } |
| } else if (isSAMType(param.getOriginType())) { |
| // SAM coercion |
| inferSAMType(param, receiver, selectedMethod, InvocationWriter.makeArgumentList(arguments), expression); |
| } |
| } |
| |
| /** |
| * In a method call with SAM coercion the inference is to be understood as a |
| * two phase process. We have the normal method call to the target method |
| * with the closure argument and we have the SAM method that will be called |
| * inside the normal target method. To infer correctly we have to "simulate" |
| * this process. We know the call to the closure will be done through the SAM |
| * type, so the SAM type generics deliver information about the Closure. At |
| * the same time the SAM class is used in the target method parameter, |
| * providing a connection from the SAM type and the target method's class. |
| */ |
| private void inferSAMType(final Parameter param, final ClassNode receiver, final MethodNode methodWithSAMParameter, final ArgumentListExpression originalMethodCallArguments, final ClosureExpression openBlock) { |
| // first we try to get as much information about the declaration class through the receiver |
| Map<GenericsTypeName, GenericsType> targetMethodConnections = new HashMap<>(); |
| for (ClassNode face : receiver.getAllInterfaces()) { |
| extractGenericsConnections(targetMethodConnections, getCorrectedClassNode(receiver, face, true), face.redirect()); |
| } |
| if (!receiver.isInterface()) { |
| extractGenericsConnections(targetMethodConnections, receiver, receiver.redirect()); |
| } |
| |
| // then we use the method with the SAM-type parameter to get more information about the declaration |
| Parameter[] parametersOfMethodContainingSAM = methodWithSAMParameter.getParameters(); |
| for (int i = 0, n = parametersOfMethodContainingSAM.length; i < n; i += 1) { |
| ClassNode parameterType = parametersOfMethodContainingSAM[i].getType(); |
| // potentially skip empty varargs |
| if (i == (n - 1) && i == originalMethodCallArguments.getExpressions().size() && parameterType.isArray()) { |
| continue; |
| } |
| Expression callArg = originalMethodCallArguments.getExpression(i); |
| // we look at the closure later in detail, so skip it here |
| if (callArg == openBlock) { |
| continue; |
| } |
| extractGenericsConnections(targetMethodConnections, getType(callArg), parameterType); |
| } |
| |
| // To make a connection to the SAM class we use that new information |
| // to replace the generics in the SAM type parameter of the target |
| // method and than that to make the connections to the SAM type generics |
| ClassNode paramTypeWithReceiverInformation = applyGenericsContext(targetMethodConnections, param.getOriginType()); |
| Map<GenericsTypeName, GenericsType> samTypeConnections = new HashMap<>(); |
| ClassNode samTypeRedirect = paramTypeWithReceiverInformation.redirect(); |
| extractGenericsConnections(samTypeConnections, paramTypeWithReceiverInformation, samTypeRedirect); |
| |
| // should the open block provide final information we apply that |
| // to the corresponding parameters of the SAM type method |
| MethodNode abstractMethod = findSAM(samTypeRedirect); |
| ClassNode[] abstractMethodParamTypes = extractTypesFromParameters(abstractMethod.getParameters()); |
| ClassNode[] blockParamTypes = openBlock.getNodeMetaData(CLOSURE_ARGUMENTS); |
| if (blockParamTypes == null) { |
| Parameter[] p = openBlock.getParameters(); |
| if (p == null) { |
| // zero parameter closure e.g. { -> println 'no args' } |
| blockParamTypes = ClassNode.EMPTY_ARRAY; |
| } else if (p.length == 0 && abstractMethodParamTypes.length != 0) { |
| // implicit it |
| blockParamTypes = abstractMethodParamTypes; |
| } else { |
| blockParamTypes = new ClassNode[p.length]; |
| for (int i = 0, n = p.length; i < n; i += 1) { |
| if (p[i] != null && !p[i].isDynamicTyped()) { |
| blockParamTypes[i] = p[i].getType(); |
| } else { |
| blockParamTypes[i] = typeOrNull(abstractMethodParamTypes, i); |
| } |
| } |
| } |
| } |
| for (int i = 0, n = blockParamTypes.length; i < n; i += 1) { |
| extractGenericsConnections(samTypeConnections, blockParamTypes[i], typeOrNull(abstractMethodParamTypes, i)); |
| } |
| |
| // finally apply the generics information to the parameters and |
| // store the type of parameter and block type as meta information |
| for (int i = 0, n = blockParamTypes.length; i < n; i += 1) { |
| blockParamTypes[i] = applyGenericsContext(samTypeConnections, typeOrNull(abstractMethodParamTypes, i)); |
| } |
| |
| tryToInferUnresolvedBlockParameterType(paramTypeWithReceiverInformation, abstractMethod, blockParamTypes); |
| |
| openBlock.putNodeMetaData(CLOSURE_ARGUMENTS, blockParamTypes); |
| } |
| |
| private void tryToInferUnresolvedBlockParameterType(final ClassNode paramTypeWithReceiverInformation, final MethodNode methodForSAM, final ClassNode[] blockParameterTypes) { |
| List<Integer> indexList = new LinkedList<>(); |
| for (int i = 0, n = blockParameterTypes.length; i < n; i += 1) { |
| ClassNode blockParameterType = blockParameterTypes[i]; |
| if (blockParameterType != null && blockParameterType.isGenericsPlaceHolder()) { |
| indexList.add(i); |
| } |
| } |
| |
| if (!indexList.isEmpty()) { |
| // If the parameter type failed to resolve, try to find the parameter type through the class hierarchy |
| Map<GenericsType, GenericsType> genericsTypeMap = GenericsUtils.makeDeclaringAndActualGenericsTypeMapOfExactType(methodForSAM.getDeclaringClass(), paramTypeWithReceiverInformation); |
| |
| for (Integer index : indexList) { |
| for (Map.Entry<GenericsType, GenericsType> entry : genericsTypeMap.entrySet()) { |
| if (entry.getKey().getName().equals(blockParameterTypes[index].getUnresolvedName())) { |
| ClassNode type = entry.getValue().getType(); |
| if (type != null && !type.isGenericsPlaceHolder()) { |
| blockParameterTypes[index] = type; |
| } |
| break; |
| } |
| } |
| } |
| } |
| } |
| |
| private static ClassNode typeOrNull(final ClassNode[] parameterTypesForSAM, final int i) { |
| return i < parameterTypesForSAM.length ? parameterTypesForSAM[i] : null; |
| } |
| |
| private List<ClassNode[]> getSignaturesFromHint(final ClosureExpression expression, final MethodNode selectedMethod, final Expression hintClass, final Expression options) { |
| // initialize hints |
| List<ClassNode[]> closureSignatures; |
| try { |
| ClassLoader transformLoader = getTransformLoader(); |
| @SuppressWarnings("unchecked") |
| Class<? extends ClosureSignatureHint> hint = (Class<? extends ClosureSignatureHint>) transformLoader.loadClass(hintClass.getText()); |
| ClosureSignatureHint hintInstance = hint.getDeclaredConstructor().newInstance(); |
| closureSignatures = hintInstance.getClosureSignatures( |
| selectedMethod instanceof ExtensionMethodNode ? ((ExtensionMethodNode) selectedMethod).getExtensionMethodNode() : selectedMethod, |
| typeCheckingContext.source, |
| typeCheckingContext.compilationUnit, |
| convertToStringArray(options), expression); |
| } catch (ClassNotFoundException | IllegalAccessException | InstantiationException | NoSuchMethodException | InvocationTargetException e) { |
| throw new GroovyBugError(e); |
| } |
| return closureSignatures; |
| } |
| |
| private List<ClassNode[]> resolveWithResolver(final List<ClassNode[]> candidates, final ClassNode receiver, final Expression arguments, final ClosureExpression expression, final MethodNode selectedMethod, final Expression resolverClass, final Expression options) { |
| // initialize resolver |
| try { |
| ClassLoader transformLoader = getTransformLoader(); |
| @SuppressWarnings("unchecked") |
| Class<? extends ClosureSignatureConflictResolver> resolver = (Class<? extends ClosureSignatureConflictResolver>) transformLoader.loadClass(resolverClass.getText()); |
| ClosureSignatureConflictResolver resolverInstance = resolver.getDeclaredConstructor().newInstance(); |
| return resolverInstance.resolve( |
| candidates, |
| receiver, |
| arguments, |
| expression, |
| selectedMethod instanceof ExtensionMethodNode ? ((ExtensionMethodNode) selectedMethod).getExtensionMethodNode() : selectedMethod, |
| typeCheckingContext.source, |
| typeCheckingContext.compilationUnit, |
| convertToStringArray(options)); |
| } catch (ClassNotFoundException | IllegalAccessException | InstantiationException | NoSuchMethodException | InvocationTargetException e) { |
| throw new GroovyBugError(e); |
| } |
| } |
| |
| private ClassLoader getTransformLoader() { |
| CompilationUnit compilationUnit = typeCheckingContext.getCompilationUnit(); |
| return compilationUnit != null ? compilationUnit.getTransformLoader() : getSourceUnit().getClassLoader(); |
| } |
| |
| private void doInferClosureParameterTypes(final ClassNode receiver, final Expression arguments, final ClosureExpression expression, final MethodNode selectedMethod, final Expression hintClass, final Expression resolverClass, final Expression options) { |
| List<ClassNode[]> closureSignatures = getSignaturesFromHint(expression, selectedMethod, hintClass, options); |
| List<ClassNode[]> candidates = new LinkedList<ClassNode[]>(); |
| Parameter[] closureParams = expression.getParameters(); |
| for (ClassNode[] signature : closureSignatures) { |
| // in order to compute the inferred types of the closure parameters, we're using the following trick: |
| // 1. create a dummy MethodNode for which the return type is a class node for which the generic types are the types returned by the hint |
| // 2. call inferReturnTypeGenerics |
| // 3. fetch inferred types from the result of inferReturnTypeGenerics |
| // In practice, it could be done differently but it has the main advantage of reusing |
| // existing code, hence reducing the amount of code to debug in case of failure. |
| ClassNode[] inferred = resolveGenericsFromTypeHint(receiver, arguments, selectedMethod, signature); |
| if (closureParams == null) return; // no-arg closure |
| if (signature.length == closureParams.length // same number of arguments |
| || (signature.length == 1 && closureParams.length == 0) // implicit it |
| || (closureParams.length > signature.length && inferred[inferred.length - 1].isArray())) { // vargs |
| candidates.add(inferred); |
| } |
| } |
| if (candidates.size() > 1) { |
| Iterator<ClassNode[]> candIt = candidates.iterator(); |
| while (candIt.hasNext()) { |
| ClassNode[] inferred = candIt.next(); |
| for (int i = 0, n = closureParams.length; i < n; i += 1) { |
| Parameter closureParam = closureParams[i]; |
| ClassNode originType = closureParam.getOriginType(); |
| ClassNode inferredType; |
| if (i < inferred.length - 1 || inferred.length == closureParams.length) { |
| inferredType = inferred[i]; |
| } else { // vargs? |
| ClassNode lastArgInferred = inferred[inferred.length - 1]; |
| if (lastArgInferred.isArray()) { |
| inferredType = lastArgInferred.getComponentType(); |
| } else { |
| candIt.remove(); |
| continue; |
| } |
| } |
| if (!typeCheckMethodArgumentWithGenerics(originType, inferredType, i == (n - 1))) { |
| candIt.remove(); |
| } |
| } |
| } |
| if (candidates.size() > 1 && resolverClass instanceof ClassExpression) { |
| candidates = resolveWithResolver(candidates, receiver, arguments, expression, selectedMethod, resolverClass, options); |
| } |
| if (candidates.size() > 1) { |
| addError("Ambiguous prototypes for closure. More than one target method matches. Please use explicit argument types.", expression); |
| } |
| } |
| if (candidates.size() == 1) { |
| ClassNode[] inferred = candidates.get(0); |
| if (closureParams.length == 0 && inferred.length == 1) { |
| expression.putNodeMetaData(CLOSURE_ARGUMENTS, inferred); |
| } else { |
| for (int i = 0, n = closureParams.length; i < n; i += 1) { |
| Parameter closureParam = closureParams[i]; |
| ClassNode originType = closureParam.getOriginType(); |
| ClassNode inferredType = OBJECT_TYPE; |
| if (i < inferred.length - 1 || inferred.length == closureParams.length) { |
| inferredType = inferred[i]; |
| } else { // vargs? |
| ClassNode lastArgInferred = inferred[inferred.length - 1]; |
| if (lastArgInferred.isArray()) { |
| inferredType = lastArgInferred.getComponentType(); |
| } else { |
| addError("Incorrect number of parameters. Expected " + inferred.length + " but found " + closureParams.length, expression); |
| } |
| } |
| boolean lastArg = i == (n - 1); |
| |
| if (!typeCheckMethodArgumentWithGenerics(originType, inferredType, lastArg)) { |
| addError("Expected parameter of type " + inferredType.toString(false) + " but got " + originType.toString(false), closureParam.getType()); |
| } |
| |
| typeCheckingContext.controlStructureVariables.put(closureParam, inferredType); |
| } |
| } |
| } |
| } |
| |
| private ClassNode[] resolveGenericsFromTypeHint(final ClassNode receiver, final Expression arguments, final MethodNode selectedMethod, final ClassNode[] signature) { |
| ClassNode dummyResultNode = new ClassNode("ClForInference$" + UNIQUE_LONG.incrementAndGet(), 0, OBJECT_TYPE).getPlainNodeReference(); |
| GenericsType[] genericTypes = new GenericsType[signature.length]; |
| for (int i = 0, n = signature.length; i < n; i += 1) { |
| genericTypes[i] = new GenericsType(signature[i]); |
| } |
| dummyResultNode.setGenericsTypes(genericTypes); |
| MethodNode dummyMN = selectedMethod instanceof ExtensionMethodNode ? ((ExtensionMethodNode) selectedMethod).getExtensionMethodNode() : selectedMethod; |
| dummyMN = new MethodNode( |
| dummyMN.getName(), |
| dummyMN.getModifiers(), |
| dummyResultNode, |
| dummyMN.getParameters(), |
| dummyMN.getExceptions(), |
| EmptyStatement.INSTANCE |
| ); |
| dummyMN.setDeclaringClass(selectedMethod.getDeclaringClass()); |
| dummyMN.setGenericsTypes(selectedMethod.getGenericsTypes()); |
| if (selectedMethod instanceof ExtensionMethodNode) { |
| ExtensionMethodNode orig = (ExtensionMethodNode) selectedMethod; |
| dummyMN = new ExtensionMethodNode( |
| dummyMN, |
| dummyMN.getName(), |
| dummyMN.getModifiers(), |
| dummyResultNode, |
| orig.getParameters(), |
| orig.getExceptions(), |
| EmptyStatement.INSTANCE, |
| orig.isStaticExtension() |
| ); |
| dummyMN.setDeclaringClass(orig.getDeclaringClass()); |
| dummyMN.setGenericsTypes(orig.getGenericsTypes()); |
| } |
| ClassNode classNode = inferReturnTypeGenerics(receiver, dummyMN, arguments); |
| ClassNode[] inferred = new ClassNode[classNode.getGenericsTypes().length]; |
| for (int i = 0; i < classNode.getGenericsTypes().length; i++) { |
| GenericsType genericsType = classNode.getGenericsTypes()[i]; |
| ClassNode value = createUsableClassNodeFromGenericsType(genericsType); |
| inferred[i] = value; |
| } |
| return inferred; |
| } |
| |
| /** |
| * Given a GenericsType instance, returns a ClassNode which can be used as an inferred type. |
| * |
| * @param genericsType a {@link org.codehaus.groovy.ast.GenericsType} representing either a type, a placeholder or a wildcard |
| * @return a class node usable as an inferred type |
| */ |
| private static ClassNode createUsableClassNodeFromGenericsType(final GenericsType genericsType) { |
| ClassNode value = genericsType.getType(); |
| if (genericsType.isPlaceholder()) { |
| value = OBJECT_TYPE; |
| } |
| ClassNode lowerBound = genericsType.getLowerBound(); |
| if (lowerBound != null) { |
| value = lowerBound; |
| } else { |
| ClassNode[] upperBounds = genericsType.getUpperBounds(); |
| if (upperBounds != null) { |
| value = WideningCategories.lowestUpperBound(Arrays.asList(upperBounds)); |
| } |
| } |
| return value; |
| } |
| |
| private static String[] convertToStringArray(final Expression options) { |
| if (options == null) { |
| return ResolveVisitor.EMPTY_STRING_ARRAY; |
| } |
| if (options instanceof ConstantExpression) { |
| return new String[]{options.getText()}; |
| } |
| if (options instanceof ListExpression) { |
| return ((ListExpression) options).getExpressions().stream().map(Expression::getText).toArray(String[]::new); |
| } |
| throw new IllegalArgumentException("Unexpected options for @ClosureParams:" + options); |
| } |
| |
| private void checkClosureWithDelegatesTo(final ClassNode receiver, final MethodNode mn, final ArgumentListExpression arguments, final Parameter[] params, final Expression expression, final Parameter param) { |
| List<AnnotationNode> annotations = param.getAnnotations(DELEGATES_TO); |
| if (annotations != null && !annotations.isEmpty()) { |
| for (AnnotationNode annotation : annotations) { |
| // in theory, there can only be one annotation of that type |
| Expression value = annotation.getMember("value"); |
| Expression strategy = annotation.getMember("strategy"); |
| Expression genericTypeIndex = annotation.getMember("genericTypeIndex"); |
| Expression type = annotation.getMember("type"); |
| Integer stInt = Closure.OWNER_FIRST; |
| if (strategy != null) { |
| stInt = (Integer) evaluateExpression(castX(Integer_TYPE, strategy), typeCheckingContext.source.getConfiguration()); |
| } |
| if (value instanceof ClassExpression && !value.getType().equals(DELEGATES_TO_TARGET)) { |
| if (genericTypeIndex != null) { |
| addStaticTypeError("Cannot use @DelegatesTo(genericTypeIndex=" + genericTypeIndex.getText() |
| + ") without @DelegatesTo.Target because generic argument types are not available at runtime", value); |
| } |
| // temporarily store the delegation strategy and the delegate type |
| expression.putNodeMetaData(DELEGATION_METADATA, new DelegationMetadata(value.getType(), stInt, typeCheckingContext.delegationMetadata)); |
| } else if (type != null && !"".equals(type.getText()) && type instanceof ConstantExpression) { |
| String typeString = type.getText(); |
| ClassNode[] resolved = GenericsUtils.parseClassNodesFromString( |
| typeString, |
| getSourceUnit(), |
| typeCheckingContext.compilationUnit, |
| mn, |
| type |
| ); |
| if (resolved != null) { |
| if (resolved.length == 1) { |
| resolved = resolveGenericsFromTypeHint(receiver, arguments, mn, resolved); |
| expression.putNodeMetaData(DELEGATION_METADATA, new DelegationMetadata(resolved[0], stInt, typeCheckingContext.delegationMetadata)); |
| } else { |
| addStaticTypeError("Incorrect type hint found in method " + (mn), type); |
| } |
| } |
| } else { |
| List<Expression> expressions = arguments.getExpressions(); |
| int expressionsSize = expressions.size(); |
| Expression parameter = annotation.getMember("target"); |
| String parameterName = parameter instanceof ConstantExpression ? parameter.getText() : ""; |
| // todo: handle vargs! |
| for (int j = 0, paramsLength = params.length; j < paramsLength; j++) { |
| Parameter methodParam = params[j]; |
| List<AnnotationNode> targets = methodParam.getAnnotations(DELEGATES_TO_TARGET); |
| if (targets != null && targets.size() == 1) { |
| AnnotationNode targetAnnotation = targets.get(0); // @DelegatesTo.Target Obj foo |
| Expression idMember = targetAnnotation.getMember("value"); |
| String id = idMember instanceof ConstantExpression ? idMember.getText() : ""; |
| if (id.equals(parameterName)) { |
| if (j < expressionsSize) { |
| Expression actualArgument = expressions.get(j); |
| ClassNode actualType = getType(actualArgument); |
| if (genericTypeIndex instanceof ConstantExpression) { |
| int gti = Integer.parseInt(genericTypeIndex.getText()); |
| ClassNode paramType = methodParam.getType(); // type annotated with @DelegatesTo.Target |
| GenericsType[] genericsTypes = paramType.getGenericsTypes(); |
| if (genericsTypes == null) { |
| addStaticTypeError("Cannot use @DelegatesTo(genericTypeIndex=" + genericTypeIndex.getText() |
| + ") with a type that doesn't use generics", methodParam); |
| } else if (gti < 0 || gti >= genericsTypes.length) { |
| addStaticTypeError("Index of generic type @DelegatesTo(genericTypeIndex=" + genericTypeIndex.getText() |
| + ") " + (gti < 0 ? "lower" : "greater") + " than those of the selected type", methodParam); |
| } else { |
| ClassNode pType = GenericsUtils.parameterizeType(actualType, paramType); |
| GenericsType[] pTypeGenerics = pType.getGenericsTypes(); |
| if (pTypeGenerics != null && pTypeGenerics.length > gti) { |
| actualType = pTypeGenerics[gti].getType(); |
| } else { |
| addStaticTypeError("Unable to map actual type [" + actualType.toString(false) + "] onto " + paramType.toString(false), methodParam); |
| } |
| } |
| } |
| expression.putNodeMetaData(DELEGATION_METADATA, new DelegationMetadata(actualType, stInt, typeCheckingContext.delegationMetadata)); |
| break; |
| } |
| } |
| } |
| } |
| if (expression.getNodeMetaData(DELEGATION_METADATA) == null) { |
| addError("Not enough arguments found for a @DelegatesTo method call. Please check that you either use an explicit class or @DelegatesTo.Target with a correct id", arguments); |
| } |
| } |
| } |
| } |
| } |
| |
| protected void addReceivers(final List<Receiver<String>> receivers, final Collection<Receiver<String>> owners, final boolean implicitThis) { |
| if (!implicitThis || typeCheckingContext.delegationMetadata == null) { |
| receivers.addAll(owners); |
| } else { |
| addReceivers(receivers, owners, typeCheckingContext.delegationMetadata, ""); |
| } |
| } |
| |
| private static void addReceivers(final List<Receiver<String>> receivers, final Collection<Receiver<String>> owners, final DelegationMetadata dmd, final String path) { |
| int strategy = dmd.getStrategy(); |
| switch (strategy) { |
| case Closure.DELEGATE_ONLY: |
| case Closure.DELEGATE_FIRST: |
| addDelegateReceiver(receivers, dmd.getType(), path + "delegate"); |
| if (strategy == Closure.DELEGATE_FIRST) { |
| if (dmd.getParent() == null) { |
| receivers.addAll(owners); |
| } else { |
| //receivers.add(new Receiver<String>(CLOSURE_TYPE, path + "owner")); |
| addReceivers(receivers, owners, dmd.getParent(), path + "owner."); |
| } |
| } |
| break; |
| case Closure.OWNER_ONLY: |
| case Closure.OWNER_FIRST: |
| if (dmd.getParent() == null) { |
| receivers.addAll(owners); |
| } else { |
| //receivers.add(new Receiver<String>(CLOSURE_TYPE, path + "owner")); |
| addReceivers(receivers, owners, dmd.getParent(), path + "owner."); |
| } |
| if (strategy == Closure.OWNER_FIRST) { |
| addDelegateReceiver(receivers, dmd.getType(), path + "delegate"); |
| } |
| break; |
| } |
| } |
| |
| private static void addDelegateReceiver(final List<Receiver<String>> receivers, final ClassNode delegate, final String path) { |
| receivers.add(new Receiver<>(delegate, path)); |
| if (Traits.isTrait(delegate.getOuterClass())) { |
| receivers.add(new Receiver<>(delegate.getOuterClass(), path)); |
| } |
| } |
| |
| @Override |
| public void visitMethodCallExpression(final MethodCallExpression call) { |
| String name = call.getMethodAsString(); |
| if (name == null) { |
| addStaticTypeError("cannot resolve dynamic method name at compile time.", call.getMethod()); |
| return; |
| } |
| if (extension.beforeMethodCall(call)) { |
| extension.afterMethodCall(call); |
| return; |
| } |
| typeCheckingContext.pushEnclosingMethodCall(call); |
| Expression objectExpression = call.getObjectExpression(); |
| |
| objectExpression.visit(this); |
| call.getMethod().visit(this); |
| |
| // if the call expression is a spread operator call, then we must make sure that |
| // the call is made on a collection type |
| if (call.isSpreadSafe()) { |
| // TODO: check if this should not be change to iterator based call logic |
| ClassNode expressionType = getType(objectExpression); |
| if (!implementsInterfaceOrIsSubclassOf(expressionType, Collection_TYPE) && !expressionType.isArray()) { |
| addStaticTypeError("Spread operator can only be used on collection types", objectExpression); |
| return; |
| } else { |
| // type check call as if it was made on component type |
| ClassNode componentType = inferComponentType(expressionType, int_TYPE); |
| MethodCallExpression subcall = callX(castX(componentType, EmptyExpression.INSTANCE), name, call.getArguments()); |
| subcall.setLineNumber(call.getLineNumber()); |
| subcall.setColumnNumber(call.getColumnNumber()); |
| subcall.setImplicitThis(call.isImplicitThis()); |
| visitMethodCallExpression(subcall); |
| // the inferred type here should be a list of what the subcall returns |
| ClassNode subcallReturnType = getType(subcall); |
| ClassNode listNode = LIST_TYPE.getPlainNodeReference(); |
| listNode.setGenericsTypes(new GenericsType[]{new GenericsType(wrapTypeIfNecessary(subcallReturnType))}); |
| storeType(call, listNode); |
| // store target method |
| storeTargetMethod(call, subcall.getNodeMetaData(DIRECT_METHOD_CALL_TARGET)); |
| typeCheckingContext.popEnclosingMethodCall(); |
| return; |
| } |
| } |
| |
| Expression callArguments = call.getArguments(); |
| ArgumentListExpression argumentList = InvocationWriter.makeArgumentList(callArguments); |
| |
| checkForbiddenSpreadArgument(argumentList); |
| |
| // for arguments, we need to visit closures *after* the method has been chosen |
| |
| ClassNode receiver = getType(objectExpression); |
| visitMethodCallArguments(receiver, argumentList, false, null); |
| |
| ClassNode[] args = getArgumentTypes(argumentList); |
| boolean isCallOnClosure = isClosureCall(name, objectExpression, callArguments); |
| |
| try { |
| boolean callArgsVisited = false; |
| if (isCallOnClosure) { |
| // this is a closure.call() call |
| if (isThisExpression(objectExpression)) { |
| // isClosureCall() check verified earlier that a field exists |
| FieldNode field = typeCheckingContext.getEnclosingClassNode().getDeclaredField(name); |
| GenericsType[] genericsTypes = field.getType().getGenericsTypes(); |
| if (genericsTypes != null) { |
| ClassNode closureReturnType = genericsTypes[0].getType(); |
| Object data = field.getNodeMetaData(CLOSURE_ARGUMENTS); |
| if (data != null) { |
| Parameter[] parameters = (Parameter[]) data; |
| typeCheckClosureCall(callArguments, args, parameters); |
| } |
| storeType(call, closureReturnType); |
| } |
| } else if (objectExpression instanceof VariableExpression) { |
| Variable variable = findTargetVariable((VariableExpression) objectExpression); |
| if (variable instanceof ASTNode) { |
| Object data = ((ASTNode) variable).getNodeMetaData(CLOSURE_ARGUMENTS); |
| if (data != null) { |
| Parameter[] parameters = (Parameter[]) data; |
| typeCheckClosureCall(callArguments, args, parameters); |
| } |
| ClassNode type = getType(((ASTNode) variable)); |
| if (type != null && type.equals(CLOSURE_TYPE)) { |
| GenericsType[] genericsTypes = type.getGenericsTypes(); |
| type = OBJECT_TYPE; |
| if (genericsTypes != null) { |
| if (!genericsTypes[0].isPlaceholder()) { |
| type = genericsTypes[0].getType(); |
| } |
| } |
| } |
| if (type != null) { |
| storeType(call, type); |
| } |
| } |
| } else if (objectExpression instanceof ClosureExpression) { |
| // we can get actual parameters directly |
| Parameter[] parameters = ((ClosureExpression) objectExpression).getParameters(); |
| typeCheckClosureCall(callArguments, args, parameters); |
| ClassNode data = getInferredReturnType(objectExpression); |
| if (data != null) { |
| storeType(call, data); |
| } |
| } |
| |
| int nbOfArgs; |
| if (callArguments instanceof ArgumentListExpression) { |
| ArgumentListExpression list = (ArgumentListExpression) callArguments; |
| nbOfArgs = list.getExpressions().size(); |
| } else { |
| // todo : other cases |
| nbOfArgs = 0; |
| } |
| storeTargetMethod(call, |
| nbOfArgs == 0 ? CLOSURE_CALL_NO_ARG : |
| nbOfArgs == 1 ? CLOSURE_CALL_ONE_ARG : |
| CLOSURE_CALL_VARGS); |
| } else { |
| // method call receivers are : |
| // - possible "with" receivers |
| // - the actual receiver as found in the method call expression |
| // - any of the potential receivers found in the instanceof temporary table |
| // in that order |
| List<Receiver<String>> receivers = new LinkedList<>(); |
| List<Receiver<String>> owners = makeOwnerList(objectExpression); |
| addReceivers(receivers, owners, call.isImplicitThis()); |
| List<MethodNode> mn = null; |
| Receiver<String> chosenReceiver = null; |
| for (Receiver<String> currentReceiver : receivers) { |
| ClassNode receiverType = currentReceiver.getType(); |
| mn = findMethod(receiverType, name, args); |
| |
| // if the receiver is "this" or "implicit this", then we must make sure that the compatible |
| // methods are only static if we are in a static context |
| // if we are not in a static context but the current receiver is a static class, we must |
| // ensure that all methods are either static or declared by the current receiver or a superclass |
| if (!mn.isEmpty() |
| && (call.isImplicitThis() || isThisExpression(objectExpression)) |
| && (typeCheckingContext.isInStaticContext || (receiverType.getModifiers() & Opcodes.ACC_STATIC) != 0)) { |
| // we create separate method lists just to be able to print out |
| // a nice error message to the user |
| // a method is accessible if it is static, or if we are not in a static context and it is |
| // declared by the current receiver or a superclass |
| List<MethodNode> accessibleMethods = new LinkedList<>(); |
| List<MethodNode> inaccessibleMethods = new LinkedList<>(); |
| for (final MethodNode node : mn) { |
| if (node.isStatic() |
| || (!typeCheckingContext.isInStaticContext && implementsInterfaceOrIsSubclassOf(receiverType, node.getDeclaringClass()))) { |
| accessibleMethods.add(node); |
| } else { |
| inaccessibleMethods.add(node); |
| } |
| } |
| mn = accessibleMethods; |
| if (accessibleMethods.isEmpty()) { |
| // choose an arbitrary method to display an error message |
| MethodNode node = inaccessibleMethods.get(0); |
| ClassNode owner = node.getDeclaringClass(); |
| addStaticTypeError("Non static method " + owner.getName() + "#" + node.getName() + " cannot be called from static context", call); |
| } |
| } |
| |
| if (!mn.isEmpty()) { |
| chosenReceiver = currentReceiver; |
| break; |
| } |
| } |
| if (mn.isEmpty() && typeCheckingContext.getEnclosingClosure() != null && args.length == 0) { |
| // add special handling of getDelegate() and getOwner() |
| if ("getDelegate".equals(name)) { |
| mn = Collections.singletonList(GET_DELEGATE); |
| } else if ("getOwner".equals(name)) { |
| mn = Collections.singletonList(GET_OWNER); |
| } else if ("getThisObject".equals(name)) { |
| mn = Collections.singletonList(GET_THISOBJECT); |
| } |
| } |
| if (mn.isEmpty()) { |
| mn = extension.handleMissingMethod(receiver, name, argumentList, args, call); |
| } |
| if (mn.isEmpty()) { |
| addNoMatchingMethodError(receiver, name, args, call); |
| } else { |
| if (areCategoryMethodCalls(mn, name, args)) { |
| addCategoryMethodCallError(call); |
| } |
| mn = disambiguateMethods(mn, chosenReceiver != null ? chosenReceiver.getType() : null, args, call); |
| |
| if (mn.size() == 1) { |
| MethodNode directMethodCallCandidate = mn.get(0); |
| if (call.getNodeMetaData(DYNAMIC_RESOLUTION) == null && |
| !directMethodCallCandidate.isStatic() && objectExpression instanceof ClassExpression && |
| !"java.lang.Class".equals(directMethodCallCandidate.getDeclaringClass().getName())) { |
| ClassNode owner = directMethodCallCandidate.getDeclaringClass(); |
| addStaticTypeError("Non static method " + owner.getName() + "#" + directMethodCallCandidate.getName() + " cannot be called from static context", call); |
| } |
| if (chosenReceiver == null) { |
| chosenReceiver = Receiver.make(directMethodCallCandidate.getDeclaringClass()); |
| } |
| |
| ClassNode returnType = getType(directMethodCallCandidate); |
| if (isUsingGenericsOrIsArrayUsingGenerics(returnType)) { |
| visitMethodCallArguments(chosenReceiver.getType(), argumentList, true, directMethodCallCandidate); |
| ClassNode irtg = inferReturnTypeGenerics(chosenReceiver.getType(), directMethodCallCandidate, callArguments, call.getGenericsTypes()); |
| returnType = (irtg != null && implementsInterfaceOrIsSubclassOf(irtg, returnType) ? irtg : returnType); |
| callArgsVisited = true; |
| } |
| if (directMethodCallCandidate == GET_DELEGATE && typeCheckingContext.getEnclosingClosure() != null) { |
| DelegationMetadata md = getDelegationMetadata(typeCheckingContext.getEnclosingClosure().getClosureExpression()); |
| returnType = typeCheckingContext.getEnclosingClassNode(); |
| if (md != null) { |
| returnType = md.getType(); |
| } |
| } |
| if (typeCheckMethodsWithGenericsOrFail(chosenReceiver.getType(), args, mn.get(0), call)) { |
| returnType = adjustWithTraits(directMethodCallCandidate, chosenReceiver.getType(), args, returnType); |
| |
| storeType(call, returnType); |
| storeTargetMethod(call, directMethodCallCandidate); |
| |
| String data = chosenReceiver.getData(); |
| if (data != null) { |
| // the method which has been chosen is supposed to be a call on delegate or owner |
| // so we store the information so that the static compiler may reuse it |
| call.putNodeMetaData(IMPLICIT_RECEIVER, data); |
| } |
| // if the object expression is a closure shared variable, we will have to perform a second pass |
| if (objectExpression instanceof VariableExpression) { |
| VariableExpression var = (VariableExpression) objectExpression; |
| if (var.isClosureSharedVariable()) { |
| SecondPassExpression<ClassNode[]> wrapper = new SecondPassExpression<>(call, args); |
| typeCheckingContext.secondPassExpressions.add(wrapper); |
| } |
| } |
| } |
| } else { |
| addAmbiguousErrorMessage(mn, name, args, call); |
| } |
| } |
| } |
| // adjust typing for explicit math methods which have special handling - operator variants handled elsewhere |
| if (NUMBER_OPS.containsKey(name) && isNumberType(receiver) && argumentList.getExpressions().size() == 1 |
| && isNumberType(getType(argumentList.getExpression(0)))) { |
| ClassNode right = getType(argumentList.getExpression(0)); |
| ClassNode resultType = getMathResultType(NUMBER_OPS.get(name), receiver, right, name); |
| if (resultType != null) { |
| storeType(call, resultType); |
| } |
| } |
| |
| // now that a method has been chosen, we are allowed to visit the closures |
| MethodNode target = call.getNodeMetaData(DIRECT_METHOD_CALL_TARGET); |
| if (!callArgsVisited) { |
| visitMethodCallArguments(receiver, argumentList, true, target); |
| } |
| if (target != null) { |
| List<Expression> argExpressions = argumentList.getExpressions(); |
| Parameter[] parameters = target.getParameters(); |
| for (int i = 0; i < argExpressions.size() && i < parameters.length; i += 1) { |
| Expression arg = argExpressions.get(i); |
| ClassNode aType = getType(arg), pType = parameters[i].getType(); |
| if (CLOSURE_TYPE.equals(aType) && CLOSURE_TYPE.equals(pType) && !isAssignableTo(aType, pType)) { |
| addNoMatchingMethodError(receiver, name, getArgumentTypes(argumentList), call); |
| call.removeNodeMetaData(DIRECT_METHOD_CALL_TARGET); |
| } |
| } |
| } |
| |
| inferMethodReferenceType(call, receiver, argumentList); |
| } finally { |
| typeCheckingContext.popEnclosingMethodCall(); |
| extension.afterMethodCall(call); |
| } |
| } |
| |
| private void inferMethodReferenceType(final MethodCallExpression call, final ClassNode receiver, final ArgumentListExpression argumentList) { |
| if (call == null) return; |
| if (receiver == null) return; |
| if (argumentList == null) return; |
| |
| List<Expression> argumentExpressionList = argumentList.getExpressions(); |
| if (argumentExpressionList == null) return; |
| |
| boolean noMethodReferenceParams = argumentExpressionList.stream().noneMatch(e -> e instanceof MethodReferenceExpression); |
| if (noMethodReferenceParams) { |
| return; |
| } |
| |
| MethodNode selectedMethod = call.getNodeMetaData(DIRECT_METHOD_CALL_TARGET); |
| if (selectedMethod == null) return; |
| |
| Parameter[] parameters = selectedMethod.getParameters(); |
| |
| List<Integer> methodReferenceParamIndexList = new LinkedList<>(); |
| List<Expression> newArgumentExpressionList = new LinkedList<>(); |
| for (int i = 0, n = argumentExpressionList.size(); i < n; i++) { |
| Expression argumentExpression = argumentExpressionList.get(i); |
| if (!(argumentExpression instanceof MethodReferenceExpression)) { |
| newArgumentExpressionList.add(argumentExpression); |
| continue; |
| } |
| |
| Parameter param = parameters[i]; |
| ClassNode paramType = param.getType(); |
| |
| if (!isFunctionalInterface(paramType.redirect())) { |
| addError("The argument is a method reference, but the parameter type is not a functional interface", argumentExpression); |
| newArgumentExpressionList.add(argumentExpression); |
| continue; |
| } |
| |
| LambdaExpression constructedLambdaExpression = constructLambdaExpressionForMethodReference(paramType); |
| |
| newArgumentExpressionList.add(constructedLambdaExpression); |
| methodReferenceParamIndexList.add(i); |
| } |
| |
| visitMethodCallArguments(receiver, new ArgumentListExpression(newArgumentExpressionList), true, selectedMethod); |
| |
| for (Integer methodReferenceParamIndex : methodReferenceParamIndexList) { |
| LambdaExpression lambdaExpression = (LambdaExpression) newArgumentExpressionList.get(methodReferenceParamIndex); |
| ClassNode[] argumentTypes = lambdaExpression.getNodeMetaData(CLOSURE_ARGUMENTS); |
| argumentExpressionList.get(methodReferenceParamIndex).putNodeMetaData(CLOSURE_ARGUMENTS, argumentTypes); |
| } |
| } |
| |
| private LambdaExpression constructLambdaExpressionForMethodReference(final ClassNode paramType) { |
| Parameter[] newParameters = createParametersForConstructedLambdaExpression(paramType); |
| return new LambdaExpression(newParameters, block()); |
| } |
| |
| private Parameter[] createParametersForConstructedLambdaExpression(final ClassNode functionalInterfaceType) { |
| MethodNode abstractMethodNode = findSAM(functionalInterfaceType); |
| |
| Parameter[] abstractMethodNodeParameters = abstractMethodNode.getParameters(); |
| if (abstractMethodNodeParameters == null) { |
| abstractMethodNodeParameters = Parameter.EMPTY_ARRAY; |
| } |
| |
| Parameter[] newParameters = new Parameter[abstractMethodNodeParameters.length]; |
| for (int i = 0; i < newParameters.length; i += 1) { |
| newParameters[i] = new Parameter(DYNAMIC_TYPE, "p" + System.nanoTime()); |
| } |
| return newParameters; |
| } |
| |
| /** |
| * A special method handling the "withTrait" call for which the type checker knows more than |
| * what the type signature is able to tell. If "withTrait" is detected, then a new class node |
| * is created representing the list of trait interfaces. |
| * |
| * @param directMethodCallCandidate a method selected by the type checker |
| * @param receiver the receiver of the method call |
| * @param args the arguments of the method call |
| * @param returnType the original return type, as inferred by the type checker |
| * @return fixed return type if the selected method is {@link org.codehaus.groovy.runtime.DefaultGroovyMethods#withTraits(Object, Class[]) withTraits} |
| */ |
| private static ClassNode adjustWithTraits(final MethodNode directMethodCallCandidate, final ClassNode receiver, final ClassNode[] args, final ClassNode returnType) { |
| if (directMethodCallCandidate instanceof ExtensionMethodNode) { |
| ExtensionMethodNode emn = (ExtensionMethodNode) directMethodCallCandidate; |
| if ("withTraits".equals(emn.getName()) && "DefaultGroovyMethods".equals(emn.getExtensionMethodNode().getDeclaringClass().getNameWithoutPackage())) { |
| List<ClassNode> nodes = new LinkedList<>(); |
| Collections.addAll(nodes, receiver.getInterfaces()); |
| for (ClassNode arg : args) { |
| if (isClassClassNodeWrappingConcreteType(arg)) { |
| nodes.add(arg.getGenericsTypes()[0].getType()); |
| } else { |
| nodes.add(arg); |
| } |
| } |
| return new LowestUpperBoundClassNode(returnType.getName() + "Composed", OBJECT_TYPE, nodes.toArray(ClassNode.EMPTY_ARRAY)); |
| } |
| } |
| return returnType; |
| } |
| |
| /** |
| * Adds various getAt and setAt methods for primitive arrays. |
| * |
| * @param receiver the receiver class |
| * @param name the name of the method |
| * @param args the argument classes |
| */ |
| private static void addArrayMethods(final List<MethodNode> methods, final ClassNode receiver, final String name, final ClassNode[] args) { |
| if (args.length != 1) return; |
| if (!receiver.isArray()) return; |
| if (!isIntCategory(getUnwrapper(args[0]))) return; |
| if ("getAt".equals(name)) { |
| MethodNode node = new MethodNode(name, Opcodes.ACC_PUBLIC, receiver.getComponentType(), new Parameter[]{new Parameter(args[0], "arg")}, null, null); |
| node.setDeclaringClass(receiver.redirect()); |
| methods.add(node); |
| } else if ("setAt".equals(name)) { |
| MethodNode node = new MethodNode(name, Opcodes.ACC_PUBLIC, VOID_TYPE, new Parameter[]{new Parameter(args[0], "arg")}, null, null); |
| node.setDeclaringClass(receiver.redirect()); |
| methods.add(node); |
| } |
| } |
| |
| /** |
| * In the case of a <em>Object.with { ... }</em> call, this method is supposed to retrieve |
| * the inferred closure return type. |
| * |
| * @param callArguments the argument list from the <em>Object#with(Closure)</em> call, ie. a single closure expression |
| * @return the inferred closure return type or <em>null</em> |
| */ |
| protected ClassNode getInferredReturnTypeFromWithClosureArgument(final Expression callArguments) { |
| if (!(callArguments instanceof ArgumentListExpression)) return null; |
| |
| ArgumentListExpression argList = (ArgumentListExpression) callArguments; |
| ClosureExpression closure = (ClosureExpression) argList.getExpression(0); |
| |
| visitClosureExpression(closure); |
| |
| if (getInferredReturnType(closure) != null) { |
| return getInferredReturnType(closure); |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Given an object expression (a receiver expression), generate the list of potential receiver types. |
| * |
| * @param objectExpression the receiver expression |
| * @return the list of types the receiver may be |
| */ |
| protected List<Receiver<String>> makeOwnerList(final Expression objectExpression) { |
| ClassNode receiver = getType(objectExpression); |
| List<Receiver<String>> owners = new LinkedList<>(); |
| owners.add(Receiver.make(receiver)); |
| if (isClassClassNodeWrappingConcreteType(receiver)) { |
| GenericsType clazzGT = receiver.getGenericsTypes()[0]; |
| owners.add(0, Receiver.make(clazzGT.getType())); |
| } |
| if (receiver.isInterface()) { |
| owners.add(Receiver.make(OBJECT_TYPE)); |
| } |
| addSelfTypes(receiver, owners); |
| if (!typeCheckingContext.temporaryIfBranchTypeInformation.empty()) { |
| List<ClassNode> potentialReceiverType = getTemporaryTypesForExpression(objectExpression); |
| if (potentialReceiverType != null) { |
| for (ClassNode node : potentialReceiverType) { |
| owners.add(Receiver.make(node)); |
| } |
| } |
| } |
| if (typeCheckingContext.lastImplicitItType != null |
| && objectExpression instanceof VariableExpression |
| && ((VariableExpression) objectExpression).getName().equals("it")) { |
| owners.add(Receiver.make(typeCheckingContext.lastImplicitItType)); |
| } |
| if (typeCheckingContext.delegationMetadata != null |
| && objectExpression instanceof VariableExpression |
| && ((VariableExpression) objectExpression).getName().equals("owner") |
| && /*isNested:*/typeCheckingContext.delegationMetadata.getParent() != null) { |
| owners.clear(); |
| List<Receiver<String>> enclosingClass = Collections.singletonList( |
| Receiver.make(typeCheckingContext.getEnclosingClassNode())); |
| addReceivers(owners, enclosingClass, typeCheckingContext.delegationMetadata.getParent(), "owner."); |
| } |
| return owners; |
| } |
| |
| private static void addSelfTypes(final ClassNode receiver, final List<Receiver<String>> owners) { |
| LinkedHashSet<ClassNode> selfTypes = new LinkedHashSet<>(); |
| for (ClassNode selfType : Traits.collectSelfTypes(receiver, selfTypes)) { |
| owners.add(Receiver.make(selfType)); |
| } |
| } |
| |
| protected void checkForbiddenSpreadArgument(final ArgumentListExpression argumentList) { |
| for (Expression arg : argumentList.getExpressions()) { |
| if (arg instanceof SpreadExpression) { |
| addStaticTypeError("The spread operator cannot be used as argument of method or closure calls with static type checking because the number of arguments cannot be determined at compile time", arg); |
| } |
| } |
| } |
| |
| protected List<ClassNode> getTemporaryTypesForExpression(final Expression objectExpression) { |
| List<ClassNode> classNodes = null; |
| int depth = typeCheckingContext.temporaryIfBranchTypeInformation.size(); |
| while (classNodes == null && depth > 0) { |
| Map<Object, List<ClassNode>> tempo = typeCheckingContext.temporaryIfBranchTypeInformation.get(--depth); |
| Object key = objectExpression instanceof ParameterVariableExpression |
| ? ((ParameterVariableExpression) objectExpression).parameter |
| : extractTemporaryTypeInfoKey(objectExpression); |
| classNodes = tempo.get(key); |
| } |
| return classNodes; |
| } |
| |
| protected void storeTargetMethod(final Expression call, final MethodNode directMethodCallCandidate) { |
| call.putNodeMetaData(DIRECT_METHOD_CALL_TARGET, directMethodCallCandidate); |
| |
| if (directMethodCallCandidate != null |
| && directMethodCallCandidate.isStatic() |
| && directMethodCallCandidate.getDeclaringClass().isInterface() |
| && !(directMethodCallCandidate instanceof ExtensionMethodNode)) { |
| typeCheckingContext.getEnclosingClassNode().putNodeMetaData(MINIMUM_BYTECODE_VERSION, Opcodes.V1_8); |
| } |
| |
| checkOrMarkPrivateAccess(call, directMethodCallCandidate); |
| checkSuperCallFromClosure(call, directMethodCallCandidate); |
| extension.onMethodSelection(call, directMethodCallCandidate); |
| } |
| |
| private void checkSuperCallFromClosure(final Expression call, final MethodNode directCallTarget) { |
| if (call instanceof MethodCallExpression && typeCheckingContext.getEnclosingClosure() != null) { |
| Expression objectExpression = ((MethodCallExpression) call).getObjectExpression(); |
| if (isSuperExpression(objectExpression)) { |
| ClassNode current = typeCheckingContext.getEnclosingClassNode(); |
| current.getNodeMetaData(SUPER_MOP_METHOD_REQUIRED, x -> new LinkedList<>()).add(directCallTarget); |
| call.putNodeMetaData(SUPER_MOP_METHOD_REQUIRED, current); |
| } |
| } |
| } |
| |
| protected boolean isClosureCall(final String name, final Expression objectExpression, final Expression arguments) { |
| if (objectExpression instanceof ClosureExpression && ("call".equals(name) || "doCall".equals(name))) return true; |
| if (isThisExpression(objectExpression)) { |
| FieldNode fieldNode = typeCheckingContext.getEnclosingClassNode().getDeclaredField(name); |
| if (fieldNode != null && CLOSURE_TYPE.equals(fieldNode.getType()) |
| && !typeCheckingContext.getEnclosingClassNode().hasPossibleMethod(name, arguments)) { |
| return true; |
| } |
| } else if (!"call".equals(name) && !"doCall".equals(name)) { |
| return false; |
| } |
| return getType(objectExpression).equals(CLOSURE_TYPE); |
| } |
| |
| protected void typeCheckClosureCall(final Expression callArguments, final ClassNode[] args, final Parameter[] parameters) { |
| if (allParametersAndArgumentsMatch(parameters, args) < 0 && |
| lastArgMatchesVarg(parameters, args) < 0) { |
| StringBuilder sb = new StringBuilder("["); |
| for (int i = 0, parametersLength = parameters.length; i < parametersLength; i += 1) { |
| Parameter parameter = parameters[i]; |
| sb.append(parameter.getType().getName()); |
| if (i < parametersLength - 1) sb.append(", "); |
| } |
| sb.append("]"); |
| addStaticTypeError("Closure argument types: " + sb + " do not match with parameter types: " + formatArgumentList(args), callArguments); |
| } |
| } |
| |
| @Override |
| public void visitIfElse(final IfStatement ifElse) { |
| Map<VariableExpression, List<ClassNode>> oldTracker = pushAssignmentTracking(); |
| |
| try { |
| // create a new temporary element in the if-then-else type info |
| typeCheckingContext.pushTemporaryTypeInfo(); |
| visitStatement(ifElse); |
| ifElse.getBooleanExpression().visit(this); |
| ifElse.getIfBlock().visit(this); |
| |
| // pop if-then-else temporary type info |
| typeCheckingContext.popTemporaryTypeInfo(); |
| |
| // GROOVY-6099: restore assignment info as before the if branch |
| restoreTypeBeforeConditional(); |
| |
| ifElse.getElseBlock().visit(this); |
| } finally { |
| popAssignmentTracking(oldTracker); |
| } |
| BinaryExpression instanceOfExpression = findInstanceOfNotReturnExpression(ifElse); |
| if (instanceOfExpression == null) { |
| instanceOfExpression = findNotInstanceOfReturnExpression(ifElse); |
| } |
| if (instanceOfExpression != null) { |
| if (typeCheckingContext.enclosingBlocks.size() > 0) { |
| visitInstanceofNot(instanceOfExpression); |
| } |
| } |
| } |
| |
| protected void visitInstanceofNot(final BinaryExpression be) { |
| BlockStatement currentBlock = typeCheckingContext.enclosingBlocks.getFirst(); |
| assert currentBlock != null; |
| if (typeCheckingContext.blockStatements2Types.containsKey(currentBlock)) { |
| // another instanceOf_not was before, no need store vars |
| } else { |
| // saving type of variables to restoring them after returning from block |
| Map<VariableExpression, List<ClassNode>> oldTracker = pushAssignmentTracking(); |
| getTypeCheckingContext().pushTemporaryTypeInfo(); |
| typeCheckingContext.blockStatements2Types.put(currentBlock, oldTracker); |
| } |
| pushInstanceOfTypeInfo(be.getLeftExpression(), be.getRightExpression()); |
| } |
| |
| @Override |
| public void visitBlockStatement(final BlockStatement block) { |
| if (block != null) { |
| typeCheckingContext.enclosingBlocks.addFirst(block); |
| } |
| super.visitBlockStatement(block); |
| if (block != null) { |
| visitClosingBlock(block); |
| } |
| } |
| |
| public void visitClosingBlock(final BlockStatement block) { |
| BlockStatement peekBlock = typeCheckingContext.enclosingBlocks.removeFirst(); |
| boolean found = typeCheckingContext.blockStatements2Types.containsKey(peekBlock); |
| if (found) { |
| Map<VariableExpression, List<ClassNode>> oldTracker = typeCheckingContext.blockStatements2Types.remove(peekBlock); |
| getTypeCheckingContext().popTemporaryTypeInfo(); |
| popAssignmentTracking(oldTracker); |
| } |
| } |
| |
| /** |
| * Check IfStatement matched pattern : |
| * Object var1; |
| * if (!(var1 instanceOf Runnable)) { |
| * return |
| * } |
| * // Here var1 instance of Runnable |
| * <p> |
| * Return expression , which contains instanceOf (without not) |
| * Return null, if not found |
| */ |
| protected BinaryExpression findInstanceOfNotReturnExpression(final IfStatement ifElse) { |
| Statement elseBlock = ifElse.getElseBlock(); |
| if (!(elseBlock instanceof EmptyStatement)) { |
| return null; |
| } |
| Expression conditionExpression = ifElse.getBooleanExpression().getExpression(); |
| if (!(conditionExpression instanceof NotExpression)) { |
| return null; |
| } |
| NotExpression notExpression = (NotExpression) conditionExpression; |
| Expression expression = notExpression.getExpression(); |
| if (!(expression instanceof BinaryExpression)) { |
| return null; |
| } |
| BinaryExpression instanceOfExpression = (BinaryExpression) expression; |
| int op = instanceOfExpression.getOperation().getType(); |
| if (op != KEYWORD_INSTANCEOF) { |
| return null; |
| } |
| if (notReturningBlock(ifElse.getIfBlock())) { |
| return null; |
| } |
| return instanceOfExpression; |
| } |
| |
| /** |
| * Check IfStatement matched pattern : |
| * Object var1; |
| * if (var1 !instanceOf Runnable) { |
| * return |
| * } |
| * // Here var1 instance of Runnable |
| * <p> |
| * Return expression , which contains instanceOf (without not) |
| * Return null, if not found |
| */ |
| protected BinaryExpression findNotInstanceOfReturnExpression(final IfStatement ifElse) { |
| Statement elseBlock = ifElse.getElseBlock(); |
| if (!(elseBlock instanceof EmptyStatement)) { |
| return null; |
| } |
| Expression conditionExpression = ifElse.getBooleanExpression().getExpression(); |
| if (!(conditionExpression instanceof BinaryExpression)) { |
| return null; |
| } |
| BinaryExpression instanceOfExpression = (BinaryExpression) conditionExpression; |
| int op = instanceOfExpression.getOperation().getType(); |
| if (op != COMPARE_NOT_INSTANCEOF) { |
| return null; |
| } |
| if (notReturningBlock(ifElse.getIfBlock())) { |
| return null; |
| } |
| return instanceOfExpression; |
| } |
| |
| private boolean notReturningBlock(final Statement block) { |
| if (!(block instanceof BlockStatement)) { |
| return true; |
| } |
| BlockStatement bs = (BlockStatement) block; |
| if (bs.getStatements().size() == 0) { |
| return true; |
| } |
| Statement last = DefaultGroovyMethods.last(bs.getStatements()); |
| if (!(last instanceof ReturnStatement)) { |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public void visitSwitch(final SwitchStatement statement) { |
| typeCheckingContext.pushEnclosingSwitchStatement(statement); |
| try { |
| Map<VariableExpression, List<ClassNode>> oldTracker = pushAssignmentTracking(); |
| try { |
| super.visitSwitch(statement); |
| } finally { |
| popAssignmentTracking(oldTracker); |
| } |
| } finally { |
| typeCheckingContext.popEnclosingSwitchStatement(); |
| } |
| } |
| |
| @Override |
| protected void afterSwitchConditionExpressionVisited(final SwitchStatement statement) { |
| Expression conditionExpression = statement.getExpression(); |
| conditionExpression.putNodeMetaData(TYPE, getType(conditionExpression)); |
| } |
| |
| @Override |
| public void visitCaseStatement(final CaseStatement statement) { |
| super.visitCaseStatement(statement); |
| restoreTypeBeforeConditional(); |
| } |
| |
| private void restoreTypeBeforeConditional() { |
| Set<Map.Entry<VariableExpression, List<ClassNode>>> entries = typeCheckingContext.ifElseForWhileAssignmentTracker.entrySet(); |
| for (Map.Entry<VariableExpression, List<ClassNode>> entry : entries) { |
| VariableExpression var = entry.getKey(); |
| List<ClassNode> items = entry.getValue(); |
| ClassNode originValue = items.get(0); |
| storeType(var, originValue); |
| } |
| } |
| |
| protected Map<VariableExpression, ClassNode> popAssignmentTracking(final Map<VariableExpression, List<ClassNode>> oldTracker) { |
| Map<VariableExpression, ClassNode> assignments = new HashMap<VariableExpression, ClassNode>(); |
| if (!typeCheckingContext.ifElseForWhileAssignmentTracker.isEmpty()) { |
| for (Map.Entry<VariableExpression, List<ClassNode>> entry : typeCheckingContext.ifElseForWhileAssignmentTracker.entrySet()) { |
| VariableExpression key = entry.getKey(); |
| List<ClassNode> allValues = entry.getValue(); |
| // GROOVY-6099: First element of the list may be null, if no assignment was made before the branch |
| List<ClassNode> nonNullValues = new ArrayList<>(allValues.size()); |
| for (ClassNode value : allValues) { |
| if (value != null) nonNullValues.add(value); |
| } |
| ClassNode cn = lowestUpperBound(nonNullValues); |
| storeType(key, cn); |
| assignments.put(key, cn); |
| } |
| } |
| typeCheckingContext.ifElseForWhileAssignmentTracker = oldTracker; |
| return assignments; |
| } |
| |
| protected Map<VariableExpression, List<ClassNode>> pushAssignmentTracking() { |
| // memorize current assignment context |
| Map<VariableExpression, List<ClassNode>> oldTracker = typeCheckingContext.ifElseForWhileAssignmentTracker; |
| typeCheckingContext.ifElseForWhileAssignmentTracker = new HashMap<>(); |
| return oldTracker; |
| } |
| |
| @Override |
| public void visitCastExpression(final CastExpression expression) { |
| super.visitCastExpression(expression); |
| if (!expression.isCoerce()) { |
| ClassNode targetType = expression.getType(); |
| Expression source = expression.getExpression(); |
| ClassNode expressionType = getType(source); |
| if (!checkCast(targetType, source) && !isDelegateOrOwnerInClosure(source)) { |
| addStaticTypeError("Inconvertible types: cannot cast " + expressionType.toString(false) + " to " + targetType.toString(false), expression); |
| } |
| } |
| storeType(expression, expression.getType()); |
| } |
| |
| private boolean isDelegateOrOwnerInClosure(final Expression exp) { |
| return typeCheckingContext.getEnclosingClosure() != null && exp instanceof VariableExpression |
| && (("delegate".equals(((VariableExpression) exp).getName())) || ("owner".equals(((VariableExpression) exp).getName()))); |
| } |
| |
| protected boolean checkCast(final ClassNode targetType, final Expression source) { |
| boolean sourceIsNull = isNullConstant(source); |
| ClassNode expressionType = getType(source); |
| if (targetType.isArray() && expressionType.isArray()) { |
| return checkCast(targetType.getComponentType(), varX("foo", expressionType.getComponentType())); |
| } else if (targetType.equals(char_TYPE) && expressionType == STRING_TYPE |
| && source instanceof ConstantExpression && source.getText().length() == 1) { |
| // ex: (char) 'c' |
| } else if (targetType.equals(Character_TYPE) && (expressionType == STRING_TYPE || sourceIsNull) |
| && (sourceIsNull || source instanceof ConstantExpression && source.getText().length() == 1)) { |
| // ex : (Character) 'c' |
| } else if (isNumberCategory(getWrapper(targetType)) && (isNumberCategory(getWrapper(expressionType)) || char_TYPE == expressionType)) { |
| // ex: short s = (short) 0 |
| } else if (sourceIsNull && !isPrimitiveType(targetType)) { |
| // ex: (Date)null |
| } else if (char_TYPE == targetType && isPrimitiveType(expressionType) && isNumberType(expressionType)) { |
| // char c = (char) ... |
| } else if (sourceIsNull && isPrimitiveType(targetType) && !boolean_TYPE.equals(targetType)) { |
| return false; |
| } else if ((expressionType.getModifiers() & Opcodes.ACC_FINAL) == 0 && targetType.isInterface()) { |
| return true; |
| } else if ((targetType.getModifiers() & Opcodes.ACC_FINAL) == 0 && expressionType.isInterface()) { |
| return true; |
| } else if (!isAssignableTo(targetType, expressionType) && !implementsInterfaceOrIsSubclassOf(expressionType, targetType)) { |
| return false; |
| } |
| return true; |
| } |
| |
| @Override |
| public void visitTernaryExpression(final TernaryExpression expression) { |
| Map<VariableExpression, List<ClassNode>> oldTracker = pushAssignmentTracking(); |
| // create a new temporary element in the if-then-else type info |
| typeCheckingContext.pushTemporaryTypeInfo(); |
| expression.getBooleanExpression().visit(this); |
| Expression trueExpression = expression.getTrueExpression(); |
| Expression falseExpression = expression.getFalseExpression(); |
| trueExpression.visit(this); |
| ClassNode typeOfTrue = findCurrentInstanceOfClass(trueExpression, getType(trueExpression)); |
| // pop if-then-else temporary type info |
| typeCheckingContext.popTemporaryTypeInfo(); |
| falseExpression.visit(this); |
| ClassNode typeOfFalse = getType(falseExpression); |
| ClassNode resultType; |
| // handle instanceof cases |
| if (hasInferredReturnType(falseExpression)) { |
| typeOfFalse = falseExpression.getNodeMetaData(INFERRED_RETURN_TYPE); |
| } |
| if (hasInferredReturnType(trueExpression)) { |
| typeOfTrue = trueExpression.getNodeMetaData(INFERRED_RETURN_TYPE); |
| } |
| // TODO consider moving next two statements "up a level", i.e. have just one more widely invoked |
| // check but determine no -ve consequences first |
| typeOfFalse = checkForTargetType(falseExpression, typeOfFalse); |
| typeOfTrue = checkForTargetType(trueExpression, typeOfTrue); |
| if (isNullConstant(trueExpression) || isNullConstant(falseExpression)) { |
| BinaryExpression enclosingBinaryExpression = typeCheckingContext.getEnclosingBinaryExpression(); |
| if (enclosingBinaryExpression != null && enclosingBinaryExpression.getRightExpression() == expression) { |
| resultType = getType(enclosingBinaryExpression.getLeftExpression()); |
| } else if (isNullConstant(trueExpression) && isNullConstant(falseExpression)) { |
| resultType = OBJECT_TYPE; |
| } else if (isNullConstant(trueExpression)) { |
| resultType = wrapTypeIfNecessary(typeOfFalse); |
| } else { |
| resultType = wrapTypeIfNecessary(typeOfTrue); |
| } |
| } else { |
| // store type information |
| resultType = lowestUpperBound(typeOfTrue, typeOfFalse); |
| } |
| storeType(expression, resultType); |
| popAssignmentTracking(oldTracker); |
| } |
| |
| // currently just for empty literals, not for e.g. Collections.emptyList() at present |
| /// it seems attractive to want to do this for more cases but perhaps not all cases |
| private ClassNode checkForTargetType(final Expression expr, final ClassNode type) { |
| BinaryExpression enclosingBinaryExpression = typeCheckingContext.getEnclosingBinaryExpression(); |
| if (enclosingBinaryExpression instanceof DeclarationExpression |
| && isEmptyCollection(expr) && isAssignment(enclosingBinaryExpression.getOperation().getType())) { |
| VariableExpression target = (VariableExpression) enclosingBinaryExpression.getLeftExpression(); |
| return adjustForTargetType(target.getType(), type); |
| } |
| if (currentField != null) { |
| return adjustForTargetType(currentField.getType(), type); |
| } |
| if (currentProperty != null) { |
| return adjustForTargetType(currentProperty.getType(), type); |
| } |
| MethodNode enclosingMethod = typeCheckingContext.getEnclosingMethod(); |
| if (enclosingMethod != null) { |
| return adjustForTargetType(enclosingMethod.getReturnType(), type); |
| } |
| return type; |
| } |
| |
| private static ClassNode adjustForTargetType(final ClassNode targetType, final ClassNode resultType) { |
| if (targetType.isUsingGenerics() && missesGenericsTypes(resultType)) { |
| // unchecked assignment within ternary/elvis |
| // examples: |
| // List<A> list = existingAs ?: [] |
| // in that case, the inferred type of the RHS is the type of the RHS |
| // "completed" with generics type information available in the LHS |
| return GenericsUtils.parameterizeType(targetType, resultType.getPlainNodeReference()); |
| } |
| return resultType; |
| } |
| |
| private static boolean isEmptyCollection(final Expression expr) { |
| return (expr instanceof ListExpression && ((ListExpression) expr).getExpressions().size() == 0) |
| || (expr instanceof MapExpression && ((MapExpression) expr).getMapEntryExpressions().size() == 0); |
| } |
| |
| private static boolean hasInferredReturnType(final Expression expression) { |
| ClassNode type = expression.getNodeMetaData(INFERRED_RETURN_TYPE); |
| return type != null && !type.getName().equals("java.lang.Object"); |
| } |
| |
| @Override |
| public void visitTryCatchFinally(final TryCatchStatement statement) { |
| List<CatchStatement> catchStatements = statement.getCatchStatements(); |
| for (CatchStatement catchStatement : catchStatements) { |
| ClassNode exceptionType = catchStatement.getExceptionType(); |
| typeCheckingContext.controlStructureVariables.put(catchStatement.getVariable(), exceptionType); |
| } |
| try { |
| super.visitTryCatchFinally(statement); |
| } finally { |
| for (CatchStatement catchStatement : catchStatements) { |
| typeCheckingContext.controlStructureVariables.remove(catchStatement.getVariable()); |
| } |
| } |
| } |
| |
| protected void storeType(final Expression exp, ClassNode cn) { |
| if (cn != null && isPrimitiveType(cn)) { |
| if (exp instanceof VariableExpression && ((VariableExpression) exp).isClosureSharedVariable()) { |
| cn = getWrapper(cn); |
| } else if (exp instanceof MethodCallExpression && ((MethodCallExpression) exp).isSafe()) { |
| cn = getWrapper(cn); |
| } else if (exp instanceof PropertyExpression && ((PropertyExpression) exp).isSafe()) { |
| cn = getWrapper(cn); |
| } |
| } |
| if (cn == UNKNOWN_PARAMETER_TYPE) { |
| // this can happen for example when "null" is used in an assignment or a method parameter. |
| // In that case, instead of storing the virtual type, we must "reset" type information |
| // by determining the declaration type of the expression |
| storeType(exp, getOriginalDeclarationType(exp)); |
| return; |
| } |
| ClassNode oldValue = (ClassNode) exp.putNodeMetaData(INFERRED_TYPE, cn); |
| if (oldValue != null) { |
| // this may happen when a variable declaration type is wider than the subsequent assignment values |
| // for example : |
| // def o = 1 // first, an int |
| // o = 'String' // then a string |
| // o = new Object() // and eventually an object ! |
| // in that case, the INFERRED_TYPE corresponds to the current inferred type, while |
| // DECLARATION_INFERRED_TYPE is the type which should be used for the initial type declaration |
| ClassNode oldDIT = exp.getNodeMetaData(DECLARATION_INFERRED_TYPE); |
| if (oldDIT != null) { |
| exp.putNodeMetaData(DECLARATION_INFERRED_TYPE, cn == null ? oldDIT : lowestUpperBound(oldDIT, cn)); |
| } else { |
| exp.putNodeMetaData(DECLARATION_INFERRED_TYPE, cn == null ? null : lowestUpperBound(oldValue, cn)); |
| } |
| } |
| if (exp instanceof VariableExpression) { |
| VariableExpression var = (VariableExpression) exp; |
| Variable accessedVariable = var.getAccessedVariable(); |
| if (accessedVariable != exp && accessedVariable instanceof VariableExpression) { |
| storeType((VariableExpression) accessedVariable, cn); |
| } |
| if (accessedVariable instanceof Parameter) { |
| ((Parameter) accessedVariable).putNodeMetaData(INFERRED_TYPE, cn); |
| } |
| if (var.isClosureSharedVariable() && cn != null) { |
| List<ClassNode> assignedTypes = typeCheckingContext.closureSharedVariablesAssignmentTypes.computeIfAbsent(var, k -> new LinkedList<ClassNode>()); |
| assignedTypes.add(cn); |
| } |
| if (!typeCheckingContext.temporaryIfBranchTypeInformation.empty()) { |
| List<ClassNode> temporaryTypesForExpression = getTemporaryTypesForExpression(exp); |
| if (temporaryTypesForExpression != null && !temporaryTypesForExpression.isEmpty()) { |
| // a type inference has been made on a variable whose type was defined in an instanceof block |
| // we erase available information with the new type |
| temporaryTypesForExpression.clear(); |
| } |
| } |
| } |
| } |
| |
| protected ClassNode getResultType(ClassNode left, final int op, final ClassNode right, final BinaryExpression expr) { |
| ClassNode leftRedirect = left.redirect(); |
| ClassNode rightRedirect = right.redirect(); |
| |
| Expression leftExpression = expr.getLeftExpression(); |
| Expression rightExpression = expr.getRightExpression(); |
| |
| if (op == EQUAL || op == ELVIS_EQUAL) { |
| if (rightRedirect.isDerivedFrom(CLOSURE_TYPE)) { |
| ClosureExpression closureExpression = null; |
| if (rightExpression instanceof ClosureExpression) { |
| closureExpression = (ClosureExpression) rightExpression; |
| } else if (rightExpression instanceof MethodReferenceExpression) { |
| closureExpression = rightExpression.getNodeMetaData(CONSTRUCTED_LAMBDA_EXPRESSION); |
| } |
| if (closureExpression != null) { |
| MethodNode abstractMethod = findSAM(left); |
| if (abstractMethod != null) { |
| return inferSAMTypeGenericsInAssignment(left, abstractMethod, right, closureExpression); |
| } |
| } |
| } |
| |
| if (leftExpression instanceof VariableExpression) { |
| ClassNode initialType = getOriginalDeclarationType(leftExpression).redirect(); |
| |
| if (isPrimitiveType(right) && initialType.isDerivedFrom(Number_TYPE)) { |
| return getWrapper(right); |
| } |
| |
| if (isPrimitiveType(initialType) && rightRedirect.isDerivedFrom(Number_TYPE)) { |
| return getUnwrapper(right); |
| } |
| |
| // as anything can be assigned to a String, Class or [Bb]oolean, return the left type instead |
| if (STRING_TYPE.equals(initialType) |
| || CLASS_Type.equals(initialType) |
| || Boolean_TYPE.equals(initialType) |
| || boolean_TYPE.equals(initialType)) { |
| return initialType; |
| } |
| } |
| |
| if (isOrImplements(rightRedirect, Collection_TYPE)) { |
| if (leftRedirect.isArray()) { |
| return leftRedirect; |
| } |
| if (isOrImplements(leftRedirect, Collection_TYPE) && |
| rightExpression instanceof ListExpression && isEmptyCollection(rightExpression)) { |
| return left; |
| } |
| } |
| |
| return right; |
| } |
| if (isBoolIntrinsicOp(op)) { |
| return boolean_TYPE; |
| } |
| if (isArrayOp(op)) { |
| // using getPNR() to ignore generics at this point |
| // and a different binary expression not to pollute the AST |
| BinaryExpression newExpr = binX(leftExpression, expr.getOperation(), rightExpression); |
| newExpr.setSourcePosition(expr); |
| MethodNode method = findMethodOrFail(newExpr, left.getPlainNodeReference(), "getAt", right.getPlainNodeReference()); |
| if (method != null && implementsInterfaceOrIsSubclassOf(right, RANGE_TYPE)) { |
| return inferReturnTypeGenerics(left, method, rightExpression); |
| } |
| return method != null ? inferComponentType(left, right) : null; |
| } |
| if (op == FIND_REGEX) { |
| // this case always succeeds the result is a Matcher |
| return Matcher_TYPE; |
| } |
| // the left operand is determining the result of the operation |
| // for primitives and their wrapper we use a fixed table here |
| String operationName = getOperationName(op); |
| ClassNode mathResultType = getMathResultType(op, leftRedirect, rightRedirect, operationName); |
| if (mathResultType != null) { |
| return mathResultType; |
| } |
| |
| // GROOVY-5890 |
| // do not mix Class<Foo> with Foo |
| if (leftExpression instanceof ClassExpression) { |
| left = CLASS_Type.getPlainNodeReference(); |
| } |
| |
| MethodNode method = findMethodOrFail(expr, left, operationName, right); |
| if (method != null) { |
| storeTargetMethod(expr, method); |
| typeCheckMethodsWithGenericsOrFail(left, new ClassNode[]{right}, method, expr); |
| if (isAssignment(op)) return left; |
| if (isCompareToBoolean(op)) return boolean_TYPE; |
| if (op == COMPARE_TO) return int_TYPE; |
| return inferReturnTypeGenerics(left, method, args(rightExpression)); |
| } |
| //TODO: other cases |
| return null; |
| } |
| |
| private ClassNode getMathResultType(final int op, final ClassNode leftRedirect, final ClassNode rightRedirect, final String operationName) { |
| if (isNumberType(leftRedirect) && isNumberType(rightRedirect)) { |
| if (isOperationInGroup(op)) { |
| if (isIntCategory(leftRedirect) && isIntCategory(rightRedirect)) return int_TYPE; |
| if (isLongCategory(leftRedirect) && isLongCategory(rightRedirect)) return long_TYPE; |
| if (isFloat(leftRedirect) && isFloat(rightRedirect)) return float_TYPE; |
| if (isDouble(leftRedirect) && isDouble(rightRedirect)) return double_TYPE; |
| } else if (isPowerOperator(op)) { |
| return Number_TYPE; |
| } else if (isBitOperator(op) || op == INTDIV || op == INTDIV_EQUAL) { |
| if (isIntCategory(getUnwrapper(leftRedirect)) && isIntCategory(getUnwrapper(rightRedirect))) |
| return int_TYPE; |
| if (isLongCategory(getUnwrapper(leftRedirect)) && isLongCategory(getUnwrapper(rightRedirect))) |
| return long_TYPE; |
| if (isBigIntCategory(getUnwrapper(leftRedirect)) && isBigIntCategory(getUnwrapper(rightRedirect))) |
| return BigInteger_TYPE; |
| } else if (isCompareToBoolean(op) || op == COMPARE_EQUAL || op == COMPARE_NOT_EQUAL) { |
| return boolean_TYPE; |
| } |
| } else if (char_TYPE.equals(leftRedirect) && char_TYPE.equals(rightRedirect)) { |
| if (isCompareToBoolean(op) || op == COMPARE_EQUAL || op == COMPARE_NOT_EQUAL) { |
| return boolean_TYPE; |
| } |
| } |
| |
| // try to find a method for the operation |
| if (isShiftOperation(operationName) && isNumberCategory(leftRedirect) && (isIntCategory(rightRedirect) || isLongCategory(rightRedirect))) { |
| return leftRedirect; |
| } |
| |
| // Divisions may produce different results depending on operand types |
| if (isNumberCategory(getWrapper(rightRedirect)) && (isNumberCategory(getWrapper(leftRedirect)) && (DIVIDE == op || DIVIDE_EQUAL == op))) { |
| if (isFloatingCategory(leftRedirect) || isFloatingCategory(rightRedirect)) { |
| if (!isPrimitiveType(leftRedirect) || !isPrimitiveType(rightRedirect)) { |
| return Double_TYPE; |
| } |
| return double_TYPE; |
| } |
| if (DIVIDE == op) { |
| return BigDecimal_TYPE; |
| } |
| return leftRedirect; |
| } else if (isOperationInGroup(op)) { |
| if (isNumberCategory(getWrapper(leftRedirect)) && isNumberCategory(getWrapper(rightRedirect))) { |
| return getGroupOperationResultType(leftRedirect, rightRedirect); |
| } |
| } |
| if (isNumberCategory(getWrapper(rightRedirect)) && isNumberCategory(getWrapper(leftRedirect)) && (MOD == op || MOD_EQUAL == op)) { |
| return leftRedirect; |
| } |
| return null; |
| } |
| |
| private ClassNode inferSAMTypeGenericsInAssignment(final ClassNode samType, final MethodNode abstractMethod, final ClassNode closureType, final ClosureExpression closureExpression) { |
| // if the sam type or closure type do not provide generics information, |
| // we cannot infer anything, thus we simply return the provided samUsage |
| GenericsType[] samTypeGenerics = samType.getGenericsTypes(); |
| GenericsType[] closureGenerics = closureType.getGenericsTypes(); |
| if (samTypeGenerics == null || closureGenerics == null) return samType; |
| |
| // extract the generics from the return type |
| Map<GenericsTypeName, GenericsType> connections = new HashMap<>(); |
| extractGenericsConnections(connections, getInferredReturnType(closureExpression), abstractMethod.getReturnType()); |
| |
| // next we get the block parameter types and set the generics |
| // information just like before |
| // TODO: add vargs handling |
| if (closureExpression.isParameterSpecified()) { |
| Parameter[] closureParams = closureExpression.getParameters(); |
| Parameter[] methodParams = abstractMethod.getParameters(); |
| for (int i = 0, n = closureParams.length; i < n; i += 1) { |
| ClassNode closureParamType = closureParams[i].getType(); |
| ClassNode methodParamType = methodParams[i].getType(); |
| extractGenericsConnections(connections, closureParamType, methodParamType); |
| } |
| } |
| return applyGenericsContext(connections, samType.redirect()); |
| } |
| |
| protected static ClassNode getGroupOperationResultType(final ClassNode a, final ClassNode b) { |
| if (isBigIntCategory(a) && isBigIntCategory(b)) return BigInteger_TYPE; |
| if (isBigDecCategory(a) && isBigDecCategory(b)) return BigDecimal_TYPE; |
| if (BigDecimal_TYPE.equals(a) || BigDecimal_TYPE.equals(b)) return BigDecimal_TYPE; |
| if (BigInteger_TYPE.equals(a) || BigInteger_TYPE.equals(b)) { |
| if (isBigIntCategory(a) && isBigIntCategory(b)) return BigInteger_TYPE; |
| return BigDecimal_TYPE; |
| } |
| if (double_TYPE.equals(a) || double_TYPE.equals(b)) return double_TYPE; |
| if (Double_TYPE.equals(a) || Double_TYPE.equals(b)) return Double_TYPE; |
| if (float_TYPE.equals(a) || float_TYPE.equals(b)) return float_TYPE; |
| if (Float_TYPE.equals(a) || Float_TYPE.equals(b)) return Float_TYPE; |
| if (long_TYPE.equals(a) || long_TYPE.equals(b)) return long_TYPE; |
| if (Long_TYPE.equals(a) || Long_TYPE.equals(b)) return Long_TYPE; |
| if (int_TYPE.equals(a) || int_TYPE.equals(b)) return int_TYPE; |
| if (Integer_TYPE.equals(a) || Integer_TYPE.equals(b)) return Integer_TYPE; |
| if (short_TYPE.equals(a) || short_TYPE.equals(b)) return short_TYPE; |
| if (Short_TYPE.equals(a) || Short_TYPE.equals(b)) return Short_TYPE; |
| if (byte_TYPE.equals(a) || byte_TYPE.equals(b)) return byte_TYPE; |
| if (Byte_TYPE.equals(a) || Byte_TYPE.equals(b)) return Byte_TYPE; |
| if (char_TYPE.equals(a) || char_TYPE.equals(b)) return char_TYPE; |
| if (Character_TYPE.equals(a) || Character_TYPE.equals(b)) return Character_TYPE; |
| return Number_TYPE; |
| } |
| |
| protected ClassNode inferComponentType(final ClassNode containerType, final ClassNode indexType) { |
| ClassNode componentType = containerType.getComponentType(); |
| if (componentType == null) { |
| // GROOVY-5521 |
| // try to identify a getAt method |
| typeCheckingContext.pushErrorCollector(); |
| MethodCallExpression vcall = callX(localVarX("_hash_", containerType), "getAt", varX("_index_", indexType)); |
| vcall.setImplicitThis(false); // GROOVY-8943 |
| try { |
| visitMethodCallExpression(vcall); |
| } finally { |
| typeCheckingContext.popErrorCollector(); |
| } |
| return getType(vcall); |
| } else { |
| return componentType; |
| } |
| } |
| |
| protected MethodNode findMethodOrFail(final Expression expr, final ClassNode receiver, final String name, final ClassNode... args) { |
| List<MethodNode> methods = findMethod(receiver, name, args); |
| if (methods.isEmpty() && (expr instanceof BinaryExpression)) { |
| BinaryExpression be = (BinaryExpression) expr; |
| MethodCallExpression call = callX(be.getLeftExpression(), name, be.getRightExpression()); |
| methods = extension.handleMissingMethod(receiver, name, args(be.getLeftExpression()), args, call); |
| } |
| if (methods.isEmpty()) { |
| addNoMatchingMethodError(receiver, name, args, expr); |
| } else { |
| if (areCategoryMethodCalls(methods, name, args)) { |
| addCategoryMethodCallError(expr); |
| } |
| methods = disambiguateMethods(methods, receiver, args, expr); |
| if (methods.size() == 1) { |
| return methods.get(0); |
| } else { |
| addAmbiguousErrorMessage(methods, name, args, expr); |
| } |
| } |
| return null; |
| } |
| |
| private List<MethodNode> disambiguateMethods(List<MethodNode> methods, final ClassNode receiver, final ClassNode[] argTypes, final Expression call) { |
| if (methods.size() > 1 && receiver != null && argTypes != null) { |
| List<MethodNode> filteredWithGenerics = new LinkedList<>(); |
| for (MethodNode methodNode : methods) { |
| if (typeCheckMethodsWithGenerics(receiver, argTypes, methodNode)) { |
| if ((methodNode.getModifiers() & Opcodes.ACC_BRIDGE) == 0) { |
| filteredWithGenerics.add(methodNode); |
| } |
| } |
| } |
| if (filteredWithGenerics.size() == 1) { |
| return filteredWithGenerics; |
| } |
| methods = extension.handleAmbiguousMethods(methods, call); |
| } |
| |
| if (methods.size() > 1) { |
| if (call instanceof MethodCall) { |
| List<MethodNode> methodNodeList = new LinkedList<>(); |
| |
| String methodName = ((MethodCall) call).getMethodAsString(); |
| |
| for (MethodNode methodNode : methods) { |
| if (!methodNode.getName().equals(methodName)) { |
| continue; |
| } |
| methodNodeList.add(methodNode); |
| } |
| |
| methods = methodNodeList; |
| } |
| } |
| |
| return methods; |
| } |
| |
| protected static String prettyPrintMethodList(final List<MethodNode> nodes) { |
| StringBuilder sb = new StringBuilder("["); |
| for (int i = 0, n = nodes.size(); i < n; i += 1) { |
| MethodNode node = nodes.get(i); |
| sb.append(node.getReturnType().toString(false)); |
| sb.append(" "); |
| sb.append(node.getDeclaringClass().toString(false)); |
| sb.append("#"); |
| sb.append(toMethodParametersString(node.getName(), extractTypesFromParameters(node.getParameters()))); |
| if (i < n - 1) sb.append(", "); |
| } |
| sb.append("]"); |
| return sb.toString(); |
| } |
| |
| protected boolean areCategoryMethodCalls(final List<MethodNode> foundMethods, final String name, final ClassNode[] args) { |
| boolean category = false; |
| if ("use".equals(name) && args != null && args.length == 2 && args[1].equals(CLOSURE_TYPE)) { |
| category = true; |
| for (MethodNode method : foundMethods) { |
| if (!(method instanceof ExtensionMethodNode) || !((ExtensionMethodNode) method).getExtensionMethodNode().getDeclaringClass().equals(DGM_CLASSNODE)) { |
| category = false; |
| break; |
| } |
| } |
| } |
| return category; |
| } |
| |
| /** |
| * This method returns the list of methods named against the supplied parameter that |
| * are defined on the specified receiver, but it will also add "non existing" methods |
| * that will be generated afterwards by the compiler, for example if a method is using |
| * default values and that the specified class node isn't compiled yet. |
| * |
| * @param receiver the receiver where to find methods |
| * @param name the name of the methods to return |
| * @return the methods that are defined on the receiver completed with stubs for future methods |
| */ |
| protected List<MethodNode> findMethodsWithGenerated(final ClassNode receiver, final String name) { |
| List<MethodNode> methods = receiver.getMethods(name); |
| if (methods.isEmpty() || receiver.isResolved()) return methods; |
| return addGeneratedMethods(receiver, methods); |
| } |
| |
| private static List<MethodNode> addGeneratedMethods(final ClassNode receiver, final List<MethodNode> methods) { |
| // using a comparator of parameters |
| List<MethodNode> result = new LinkedList<>(); |
| for (MethodNode method : methods) { |
| result.add(method); |
| Parameter[] parameters = method.getParameters(); |
| int counter = 0; |
| int size = parameters.length; |
| for (int i = size - 1; i >= 0; i--) { |
| Parameter parameter = parameters[i]; |
| if (parameter != null && parameter.hasInitialExpression()) { |
| counter++; |
| } |
| } |
| |
| for (int j = 1; j <= counter; j++) { |
| Parameter[] newParams = new Parameter[parameters.length - j]; |
| int index = 0; |
| int k = 1; |
| for (Parameter parameter : parameters) { |
| if (k > counter - j && parameter != null && parameter.hasInitialExpression()) { |
| k++; |
| } else if (parameter != null && parameter.hasInitialExpression()) { |
| newParams[index++] = parameter; |
| k++; |
| } else { |
| newParams[index++] = parameter; |
| } |
| } |
| MethodNode stubbed; |
| if ("<init>".equals(method.getName())) { |
| stubbed = new ConstructorNode( |
| method.getModifiers(), |
| newParams, |
| method.getExceptions(), |
| GENERATED_EMPTY_STATEMENT |
| ); |
| |
| } else { |
| stubbed = new MethodNode( |
| method.getName(), |
| method.getModifiers(), |
| method.getReturnType(), |
| newParams, |
| method.getExceptions(), |
| GENERATED_EMPTY_STATEMENT |
| ); |
| stubbed.setGenericsTypes(method.getGenericsTypes()); |
| } |
| stubbed.setDeclaringClass(method.getDeclaringClass()); |
| result.add(stubbed); |
| } |
| } |
| return result; |
| } |
| |
| protected List<MethodNode> findMethod(ClassNode receiver, final String name, final ClassNode... args) { |
| if (isPrimitiveType(receiver)) receiver = getWrapper(receiver); |
| List<MethodNode> methods; |
| if (!receiver.isInterface() && "<init>".equals(name)) { |
| methods = addGeneratedMethods(receiver, new ArrayList<>(receiver.getDeclaredConstructors())); |
| if (methods.isEmpty()) { |
| MethodNode node = new ConstructorNode(Opcodes.ACC_PUBLIC, Parameter.EMPTY_ARRAY, ClassNode.EMPTY_ARRAY, GENERATED_EMPTY_STATEMENT); |
| node.setDeclaringClass(receiver); |
| methods = Collections.singletonList(node); |
| if (receiver.isArray()) { |
| // No need to check the arguments against an array constructor: it just needs to exist. The array is |
| // created through coercion or by specifying its dimension(s), anyway, and would not match an |
| // arbitrary number of parameters. |
| return methods; |
| } |
| } |
| } else { |
| methods = findMethodsWithGenerated(receiver, name); |
| if (receiver.isInterface()) { |
| collectAllInterfaceMethodsByName(receiver, name, methods); |
| methods.addAll(OBJECT_TYPE.getMethods(name)); |
| |
| if ("call".equals(name) && isFunctionalInterface(receiver)) { |
| MethodNode sam = findSAM(receiver); |
| MethodNode callMethodNode = new MethodNode("call", sam.getModifiers(), sam.getReturnType(), sam.getParameters(), sam.getExceptions(), sam.getCode()); |
| callMethodNode.setDeclaringClass(sam.getDeclaringClass()); |
| callMethodNode.setSourcePosition(sam); |
| |
| methods.addAll(Collections.singletonList(callMethodNode)); |
| } |
| } |
| // TODO: investigate the trait exclusion a bit further, needed otherwise |
| // CallMethodOfTraitInsideClosureAndClosureParamTypeInference fails saying |
| // not static method can't be called from a static context |
| if (typeCheckingContext.getEnclosingClosure() == null || (receiver.getOuterClass() != null && !receiver.getName().endsWith("$Trait$Helper"))) { |
| // not in a closure or within an inner class |
| ClassNode parent = receiver; |
| while (parent.getOuterClass() != null && !parent.isStaticClass()) { |
| parent = parent.getOuterClass(); |
| methods.addAll(findMethodsWithGenerated(parent, name)); |
| } |
| } |
| if (methods.isEmpty()) { |
| addArrayMethods(methods, receiver, name, args); |
| } |
| if (methods.isEmpty() && (args == null || args.length == 0)) { |
| // check if it's a property |
| String pname = extractPropertyNameFromMethodName("get", name); |
| if (pname == null) { |
| pname = extractPropertyNameFromMethodName("is", name); |
| } |
| if (pname != null) { |
| // we don't use property exists there because findMethod is called on super clases recursively |
| PropertyNode property = null; |
| ClassNode curNode = receiver; |
| while (property == null && curNode != null) { |
| property = curNode.getProperty(pname); |
| ClassNode svCur = curNode; |
| while (property == null && svCur.getOuterClass() != null && !svCur.isStaticClass()) { |
| svCur = svCur.getOuterClass(); |
| property = svCur.getProperty(pname); |
| if (property != null) { |
| receiver = svCur; |
| break; |
| } |
| } |
| curNode = curNode.getSuperClass(); |
| } |
| if (property != null) { |
| MethodNode node = new MethodNode(name, Opcodes.ACC_PUBLIC, property.getType(), Parameter.EMPTY_ARRAY, ClassNode.EMPTY_ARRAY, GENERATED_EMPTY_STATEMENT); |
| if (property.isStatic()) { |
| node.setModifiers(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC); |
| } |
| node.setDeclaringClass(receiver); |
| return Collections.singletonList( |
| node); |
| |
| } |
| } |
| } else if (methods.isEmpty() && args != null && args.length == 1) { |
| // maybe we are looking for a setter ? |
| String pname = extractPropertyNameFromMethodName("set", name); |
| if (pname != null) { |
| ClassNode curNode = receiver; |
| PropertyNode property = null; |
| while (property == null && curNode != null) { |
| property = curNode.getProperty(pname); |
| curNode = curNode.getSuperClass(); |
| } |
| if (property != null) { |
| ClassNode type = property.getOriginType(); |
| if (implementsInterfaceOrIsSubclassOf(wrapTypeIfNecessary(args[0]), wrapTypeIfNecessary(type))) { |
| MethodNode node = new MethodNode(name, Opcodes.ACC_PUBLIC, VOID_TYPE, new Parameter[]{new Parameter(type, "arg")}, ClassNode.EMPTY_ARRAY, GENERATED_EMPTY_STATEMENT); |
| if (property.isStatic()) { |
| node.setModifiers(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC); |
| } |
| node.setDeclaringClass(receiver); |
| return Collections.singletonList(node); |
| } |
| } |
| } |
| } |
| } |
| |
| if (methods.isEmpty()) { |
| // look at the interfaces, there's a chance that a method is not implemented and we should not hide the |
| // error from the compiler |
| collectAllInterfaceMethodsByName(receiver, name, methods); |
| } |
| |
| // lookup in DGM methods too |
| findDGMMethodsByNameAndArguments(getTransformLoader(), receiver, name, args, methods); |
| methods = filterMethodsByVisibility(methods); |
| List<MethodNode> chosen = chooseBestMethod(receiver, methods, args); |
| if (!chosen.isEmpty()) return chosen; |
| |
| // GROOVY-5566 |
| if (receiver instanceof InnerClassNode && ((InnerClassNode) receiver).isAnonymous() && methods.size() == 1 && args != null && "<init>".equals(name)) { |
| MethodNode constructor = methods.get(0); |
| if (constructor.getParameters().length == args.length) { |
| return methods; |
| } |
| } |
| |
| if (receiver.equals(CLASS_Type) && receiver.getGenericsTypes() != null) { |
| List<MethodNode> result = findMethod(receiver.getGenericsTypes()[0].getType(), name, args); |
| if (!result.isEmpty()) return result; |
| } |
| |
| if (GSTRING_TYPE.equals(receiver)) return findMethod(STRING_TYPE, name, args); |
| |
| if (isBeingCompiled(receiver)) { |
| chosen = findMethod(GROOVY_OBJECT_TYPE, name, args); |
| if (!chosen.isEmpty()) return chosen; |
| } |
| |
| return EMPTY_METHODNODE_LIST; |
| } |
| |
| private List<MethodNode> filterMethodsByVisibility(final List<MethodNode> methodNodeList) { |
| return StaticTypeCheckingSupport.filterMethodsByVisibility(methodNodeList, typeCheckingContext.getEnclosingClassNode()); |
| } |
| |
| /** |
| * Given a method name and a prefix, returns the name of the property that should be looked up, |
| * following the java beans rules. For example, "getName" would return "name", while |
| * "getFullName" would return "fullName". |
| * If the prefix is not found, returns null. |
| * |
| * @param prefix the method name prefix ("get", "is", "set", ...) |
| * @param methodName the method name |
| * @return a property name if the prefix is found and the method matches the java beans rules, null otherwise |
| */ |
| public static String extractPropertyNameFromMethodName(final String prefix, final String methodName) { |
| if (prefix == null || methodName == null) return null; |
| if (methodName.startsWith(prefix) && prefix.length() < methodName.length()) { |
| String result = methodName.substring(prefix.length()); |
| String propertyName = decapitalize(result); |
| if (result.equals(capitalize(propertyName))) return propertyName; |
| } |
| return null; |
| } |
| |
| protected void collectAllInterfaceMethodsByName(final ClassNode receiver, final String name, final List<MethodNode> methods) { |
| ClassNode cNode = receiver; |
| while (cNode != null) { |
| ClassNode[] interfaces = cNode.getInterfaces(); |
| if (interfaces != null && interfaces.length > 0) { |
| for (ClassNode node : interfaces) { |
| List<MethodNode> intfMethods = node.getMethods(name); |
| methods.addAll(intfMethods); |
| collectAllInterfaceMethodsByName(node, name, methods); |
| } |
| } |
| cNode = cNode.getSuperClass(); |
| } |
| } |
| |
| protected ClassNode getType(final ASTNode exp) { |
| ClassNode cn = exp.getNodeMetaData(INFERRED_TYPE); |
| if (cn != null) { |
| return cn; |
| } |
| if (exp instanceof ClassExpression) { |
| ClassNode node = CLASS_Type.getPlainNodeReference(); |
| node.setGenericsTypes(new GenericsType[]{ |
| new GenericsType(((ClassExpression) exp).getType()) |
| }); |
| return node; |
| } |
| if (exp instanceof VariableExpression) { |
| VariableExpression vexp = (VariableExpression) exp; |
| ClassNode selfTrait = isTraitSelf(vexp); |
| if (selfTrait != null) return makeSelf(selfTrait); |
| if (vexp.isThisExpression()) return makeThis(); |
| if (vexp.isSuperExpression()) return makeSuper(); |
| Variable variable = vexp.getAccessedVariable(); |
| if (variable instanceof FieldNode) { |
| FieldNode fieldNode = (FieldNode) variable; |
| checkOrMarkPrivateAccess(vexp, fieldNode, isLHSOfEnclosingAssignment(vexp)); |
| return getType(fieldNode); |
| } |
| if (variable != vexp && variable instanceof VariableExpression) { |
| return getType((Expression) variable); |
| } |
| if (variable instanceof Parameter) { |
| Parameter parameter = (Parameter) variable; |
| ClassNode type = null; |
| // check if param part of control structure - but not if inside instanceof |
| List<ClassNode> temporaryTypesForExpression = getTemporaryTypesForExpression(vexp); |
| if (temporaryTypesForExpression == null || temporaryTypesForExpression.isEmpty()) { |
| type = typeCheckingContext.controlStructureVariables.get(parameter); |
| } |
| // now check for closure override |
| TypeCheckingContext.EnclosingClosure enclosingClosure = typeCheckingContext.getEnclosingClosure(); |
| if (type == null && enclosingClosure != null && temporaryTypesForExpression == null) { |
| type = getTypeFromClosureArguments(parameter, enclosingClosure); |
| } |
| if (type != null) { |
| storeType(vexp, type); |
| return type; |
| } |
| return getType((Parameter) variable); |
| } |
| return vexp.getOriginType(); |
| } |
| |
| if (exp instanceof ListExpression) { |
| return inferListExpressionType((ListExpression) exp); |
| } |
| if (exp instanceof MapExpression) { |
| return inferMapExpressionType((MapExpression) exp); |
| } |
| if (exp instanceof ConstructorCallExpression) { |
| return ((ConstructorCallExpression) exp).getType(); |
| } |
| if (exp instanceof MethodNode) { |
| if ((exp == GET_DELEGATE || exp == GET_OWNER || exp == GET_THISOBJECT) && typeCheckingContext.getEnclosingClosure() != null) { |
| return typeCheckingContext.getEnclosingClassNode(); |
| } |
| ClassNode ret = getInferredReturnType(exp); |
| return ret != null ? ret : ((MethodNode) exp).getReturnType(); |
| } |
| if (exp instanceof RangeExpression) { |
| ClassNode plain = RANGE_TYPE.getPlainNodeReference(); |
| RangeExpression re = (RangeExpression) exp; |
| ClassNode fromType = getType(re.getFrom()); |
| ClassNode toType = getType(re.getTo()); |
| if (fromType.equals(toType)) { |
| plain.setGenericsTypes(new GenericsType[]{ |
| new GenericsType(wrapTypeIfNecessary(fromType)) |
| }); |
| } else { |
| plain.setGenericsTypes(new GenericsType[]{ |
| new GenericsType(wrapTypeIfNecessary(lowestUpperBound(fromType, toType))) |
| }); |
| } |
| return plain; |
| } |
| if (exp instanceof UnaryPlusExpression) { |
| return getType(((UnaryPlusExpression) exp).getExpression()); |
| } |
| if (exp instanceof UnaryMinusExpression) { |
| return getType(((UnaryMinusExpression) exp).getExpression()); |
| } |
| if (exp instanceof BitwiseNegationExpression) { |
| return getType(((BitwiseNegationExpression) exp).getExpression()); |
| } |
| if (exp instanceof Parameter) { |
| return ((Parameter) exp).getOriginType(); |
| } |
| if (exp instanceof FieldNode) { |
| FieldNode fn = (FieldNode) exp; |
| return getGenericsResolvedTypeOfFieldOrProperty(fn, fn.getOriginType()); |
| } |
| if (exp instanceof PropertyNode) { |
| PropertyNode pn = (PropertyNode) exp; |
| return getGenericsResolvedTypeOfFieldOrProperty(pn, pn.getOriginType()); |
| } |
| if (exp instanceof ClosureExpression) { |
| ClassNode irt = getInferredReturnType(exp); |
| if (irt != null) { |
| irt = wrapTypeIfNecessary(irt); |
| ClassNode result = CLOSURE_TYPE.getPlainNodeReference(); |
| result.setGenericsTypes(new GenericsType[]{new GenericsType(irt)}); |
| return result; |
| } |
| } else if (exp instanceof MethodCall) { |
| MethodNode target = exp.getNodeMetaData(DIRECT_METHOD_CALL_TARGET); |
| if (target != null) { |
| return getType(target); |
| } |
| } |
| return ((Expression) exp).getType(); |
| } |
| |
| private ClassNode getTypeFromClosureArguments(final Parameter parameter, final TypeCheckingContext.EnclosingClosure enclosingClosure) { |
| ClosureExpression closureExpression = enclosingClosure.getClosureExpression(); |
| ClassNode[] closureParamTypes = closureExpression.getNodeMetaData(CLOSURE_ARGUMENTS); |
| if (closureParamTypes == null) return null; |
| Parameter[] parameters = closureExpression.getParameters(); |
| String name = parameter.getName(); |
| |
| if (parameters != null) { |
| if (parameters.length == 0) { |
| return "it".equals(name) && closureParamTypes.length != 0 ? closureParamTypes[0] : null; |
| } |
| |
| for (int index = 0; index < parameters.length; index++) { |
| if (name.equals(parameters[index].getName())) { |
| return closureParamTypes.length > index ? closureParamTypes[index] : null; |
| } |
| } |
| } |
| |
| return null; |
| } |
| |
| /** |
| * resolves a Field or Property node generics by using the current class and |
| * the declaring class to extract the right meaning of the generics symbols |
| * |
| * @param an a FieldNode or PropertyNode |
| * @param type the origin type |
| * @return the new ClassNode with corrected generics |
| */ |
| private ClassNode getGenericsResolvedTypeOfFieldOrProperty(final AnnotatedNode an, final ClassNode type) { |
| if (!type.isUsingGenerics()) return type; |
| Map<GenericsTypeName, GenericsType> connections = new HashMap<>(); |
| // TODO: inner classes mean a different this-type. This is ignored here! |
| extractGenericsConnections(connections, typeCheckingContext.getEnclosingClassNode(), an.getDeclaringClass()); |
| return applyGenericsContext(connections, type); |
| } |
| |
| private static ClassNode makeSelf(final ClassNode trait) { |
| ClassNode selfType = trait; |
| Set<ClassNode> selfTypes = Traits.collectSelfTypes(selfType, new LinkedHashSet<>()); |
| if (!selfTypes.isEmpty()) { |
| selfTypes.add(selfType); |
| selfType = new UnionTypeClassNode(selfTypes.toArray(ClassNode.EMPTY_ARRAY)); |
| } |
| return selfType; |
| } |
| |
| private ClassNode makeSuper() { |
| return makeType(typeCheckingContext.getEnclosingClassNode().getSuperClass(), typeCheckingContext.isInStaticContext); |
| } |
| |
| private ClassNode makeThis() { |
| return makeType(typeCheckingContext.getEnclosingClassNode(), typeCheckingContext.isInStaticContext); |
| } |
| |
| /** |
| * Wrap type in Class<> if usingClass==true. |
| */ |
| private static ClassNode makeType(final ClassNode cn, final boolean usingClass) { |
| if (usingClass) { |
| ClassNode clazzType = CLASS_Type.getPlainNodeReference(); |
| clazzType.setGenericsTypes(new GenericsType[]{new GenericsType(cn)}); |
| return clazzType; |
| } else { |
| return cn; |
| } |
| } |
| |
| /** |
| * Stores the inferred return type of a closure or a method. We are using a separate key to store |
| * inferred return type because the inferred type of a closure is {@link Closure}, which is different |
| * from the inferred type of the code of the closure. |
| * |
| * @param node a {@link ClosureExpression} or a {@link MethodNode} |
| * @param type the inferred return type of the code |
| * @return the old value of the inferred type |
| */ |
| protected ClassNode storeInferredReturnType(final ASTNode node, final ClassNode type) { |
| if (!(node instanceof ClosureExpression)) { |
| throw new IllegalArgumentException("Storing inferred return type is only allowed on closures but found " + node.getClass()); |
| } |
| return (ClassNode) node.putNodeMetaData(INFERRED_RETURN_TYPE, type); |
| } |
| |
| /** |
| * Returns the inferred return type of a closure or a method, if stored on the AST node. This method |
| * doesn't perform any type inference by itself. |
| * |
| * @param exp a {@link ClosureExpression} or {@link MethodNode} |
| * @return the inferred type, as stored on node metadata. |
| */ |
| protected ClassNode getInferredReturnType(final ASTNode exp) { |
| return (ClassNode) exp.getNodeMetaData(INFERRED_RETURN_TYPE); |
| } |
| |
| protected ClassNode inferListExpressionType(final ListExpression list) { |
| List<Expression> expressions = list.getExpressions(); |
| if (expressions.isEmpty()) { |
| // cannot infer, return list type |
| return list.getType(); |
| } |
| ClassNode listType = list.getType(); |
| GenericsType[] genericsTypes = listType.getGenericsTypes(); |
| if ((genericsTypes == null |
| || genericsTypes.length == 0 |
| || (genericsTypes.length == 1 && OBJECT_TYPE.equals(genericsTypes[0].getType()))) |
| && (!expressions.isEmpty())) { |
| // maybe we can infer the component type |
| List<ClassNode> nodes = new LinkedList<>(); |
| for (Expression expression : expressions) { |
| if (isNullConstant(expression)) { |
| // a null element is found in the list, skip it because we'll use the other elements from the list |
| } else { |
| nodes.add(getType(expression)); |
| } |
| } |
| if (nodes.isEmpty()) { |
| // every element was the null constant |
| return listType; |
| } |
| ClassNode superType = getWrapper(lowestUpperBound(nodes)); // to be used in generics, type must be boxed |
| ClassNode inferred = listType.getPlainNodeReference(); |
| inferred.setGenericsTypes(new GenericsType[]{new GenericsType(wrapTypeIfNecessary(superType))}); |
| return inferred; |
| } |
| return listType; |
| } |
| |
| protected static boolean isNullConstant(final Expression expression) { |
| return expression instanceof ConstantExpression && ((ConstantExpression) expression).isNullExpression(); |
| } |
| |
| protected static boolean isThisExpression(final Expression expression) { |
| return expression instanceof VariableExpression && ((VariableExpression) expression).isThisExpression(); |
| } |
| |
| protected static boolean isSuperExpression(final Expression expression) { |
| return expression instanceof VariableExpression && ((VariableExpression) expression).isSuperExpression(); |
| } |
| |
| protected ClassNode inferMapExpressionType(final MapExpression map) { |
| ClassNode mapType = LINKEDHASHMAP_CLASSNODE.getPlainNodeReference(); |
| List<MapEntryExpression> entryExpressions = map.getMapEntryExpressions(); |
| if (entryExpressions.isEmpty()) return mapType; |
| GenericsType[] genericsTypes = mapType.getGenericsTypes(); |
| if (genericsTypes == null |
| || genericsTypes.length < 2 |
| || (genericsTypes.length == 2 && OBJECT_TYPE.equals(genericsTypes[0].getType()) && OBJECT_TYPE.equals(genericsTypes[1].getType()))) { |
| List<ClassNode> keyTypes = new LinkedList<>(); |
| List<ClassNode> valueTypes = new LinkedList<>(); |
| for (MapEntryExpression entryExpression : entryExpressions) { |
| keyTypes.add(getType(entryExpression.getKeyExpression())); |
| valueTypes.add(getType(entryExpression.getValueExpression())); |
| } |
| ClassNode keyType = getWrapper(lowestUpperBound(keyTypes)); // to be used in generics, type must be boxed |
| ClassNode valueType = getWrapper(lowestUpperBound(valueTypes)); // to be used in generics, type must be boxed |
| if (!OBJECT_TYPE.equals(keyType) || !OBJECT_TYPE.equals(valueType)) { |
| ClassNode inferred = mapType.getPlainNodeReference(); |
| inferred.setGenericsTypes(new GenericsType[]{new GenericsType(wrapTypeIfNecessary(keyType)), new GenericsType(wrapTypeIfNecessary(valueType))}); |
| return inferred; |
| } |
| } |
| return mapType; |
| } |
| |
| private static class ExtensionMethodDeclaringClass { |
| } |
| |
| /** |
| * If a method call returns a parameterized type, then we can perform additional inference on the |
| * return type, so that the type gets actual type parameters. For example, the method |
| * Arrays.asList(T...) is generified with type T which can be deduced from actual type |
| * arguments. |
| * |
| * @param method the method node |
| * @param arguments the method call arguments |
| * @return parameterized, infered, class node |
| */ |
| protected ClassNode inferReturnTypeGenerics(final ClassNode receiver, final MethodNode method, final Expression arguments) { |
| return inferReturnTypeGenerics(receiver, method, arguments, null); |
| } |
| |
| /** |
| * If a method call returns a parameterized type, then we can perform additional inference on the |
| * return type, so that the type gets actual type parameters. For example, the method |
| * Arrays.asList(T...) is generified with type T which can be deduced from actual type |
| * arguments. |
| * |
| * @param method the method node |
| * @param arguments the method call arguments |
| * @param explicitTypeHints explicit type hints as found for example in Collections.<String>emptyList() |
| * @return parameterized, infered, class node |
| */ |
| protected ClassNode inferReturnTypeGenerics(final ClassNode receiver, final MethodNode method, final Expression arguments, final GenericsType[] explicitTypeHints) { |
| ClassNode returnType = method.getReturnType(); |
| if (method instanceof ExtensionMethodNode |
| && (isUsingGenericsOrIsArrayUsingGenerics(returnType))) { |
| // check if the placeholder corresponds to the placeholder of the first parameter |
| ExtensionMethodNode emn = (ExtensionMethodNode) method; |
| MethodNode dgmMethod = emn.getExtensionMethodNode(); |
| ClassNode dc = emn.getDeclaringClass(); |
| ArgumentListExpression argList = new ArgumentListExpression(); |
| VariableExpression vexp = varX("$foo", receiver); |
| vexp.setNodeMetaData(ExtensionMethodDeclaringClass.class, dc); |
| argList.addExpression(vexp); |
| if (arguments instanceof ArgumentListExpression) { |
| List<Expression> expressions = ((ArgumentListExpression) arguments).getExpressions(); |
| for (Expression arg : expressions) { |
| argList.addExpression(arg); |
| } |
| } else { |
| argList.addExpression(arguments); |
| } |
| return inferReturnTypeGenerics(receiver, dgmMethod, argList); |
| } |
| if (!isUsingGenericsOrIsArrayUsingGenerics(returnType)) return returnType; |
| if (getGenericsWithoutArray(returnType) == null) return returnType; |
| Map<GenericsTypeName, GenericsType> resolvedPlaceholders = resolvePlaceHoldersFromDeclaration(receiver, getDeclaringClass(method, arguments), method, method.isStatic()); |
| if (!receiver.isGenericsPlaceHolder()) { |
| GenericsUtils.extractPlaceholders(receiver, resolvedPlaceholders); |
| } |
| resolvePlaceholdersFromExplicitTypeHints(method, explicitTypeHints, resolvedPlaceholders); |
| if (resolvedPlaceholders.isEmpty()) { |
| return boundUnboundedWildcards(returnType); |
| } |
| Map<GenericsTypeName, GenericsType> placeholdersFromContext = extractGenericsParameterMapOfThis(typeCheckingContext.getEnclosingMethod()); |
| applyGenericsConnections(placeholdersFromContext, resolvedPlaceholders); |
| |
| // then resolve receivers from method arguments |
| Parameter[] parameters = method.getParameters(); |
| boolean isVargs = isVargs(parameters); |
| ArgumentListExpression argList = InvocationWriter.makeArgumentList(arguments); |
| List<Expression> expressions = argList.getExpressions(); |
| int paramLength = parameters.length; |
| if (expressions.size() >= paramLength) { |
| for (int i = 0; i < paramLength; i++) { |
| boolean lastArg = i == paramLength - 1; |
| ClassNode type = parameters[i].getType(); |
| ClassNode actualType = getType(expressions.get(i)); |
| while (!type.isUsingGenerics() && type.isArray() && actualType.isArray()) { |
| type = type.getComponentType(); |
| actualType = actualType.getComponentType(); |
| } |
| if (isUsingGenericsOrIsArrayUsingGenerics(type)) { |
| if (implementsInterfaceOrIsSubclassOf(actualType, CLOSURE_TYPE) && |
| isSAMType(type)) { |
| // implicit closure coercion in action! |
| Map<GenericsTypeName, GenericsType> pholders = applyGenericsContextToParameterClass(resolvedPlaceholders, type); |
| actualType = convertClosureTypeToSAMType(expressions.get(i), actualType, type, pholders); |
| } |
| if (isVargs && lastArg && actualType.isArray()) { |
| actualType = actualType.getComponentType(); |
| } |
| if (isVargs && lastArg && type.isArray()) { |
| type = type.getComponentType(); |
| } |
| actualType = wrapTypeIfNecessary(actualType); |
| |
| Map<GenericsTypeName, GenericsType> connections = new HashMap<>(); |
| extractGenericsConnections(connections, actualType, type); |
| extractGenericsConnectionsForSuperClassAndInterfaces(resolvedPlaceholders, connections); |
| applyGenericsConnections(connections, resolvedPlaceholders); |
| } |
| } |
| } |
| |
| return applyGenericsContext(resolvedPlaceholders, returnType); |
| } |
| |
| private static void resolvePlaceholdersFromExplicitTypeHints(final MethodNode method, final GenericsType[] explicitTypeHints, final Map<GenericsTypeName, GenericsType> resolvedPlaceholders) { |
| if (explicitTypeHints != null) { |
| GenericsType[] methodGenericTypes = method.getGenericsTypes(); |
| if (methodGenericTypes != null && methodGenericTypes.length == explicitTypeHints.length) { |
| for (int i = 0; i < explicitTypeHints.length; i++) { |
| GenericsType methodGenericType = methodGenericTypes[i]; |
| GenericsType explicitTypeHint = explicitTypeHints[i]; |
| resolvedPlaceholders.put(new GenericsTypeName(methodGenericType.getName()), explicitTypeHint); |
| } |
| } |
| } |
| } |
| |
| private static void extractGenericsConnectionsForSuperClassAndInterfaces(final Map<GenericsTypeName, GenericsType> resolvedPlaceholders, final Map<GenericsTypeName, GenericsType> connections) { |
| for (GenericsType value : new HashSet<GenericsType>(connections.values())) { |
| if (!value.isPlaceholder() && !value.isWildcard()) { |
| ClassNode valueType = value.getType(); |
| List<ClassNode> deepNodes = new LinkedList<>(); |
| ClassNode unresolvedSuperClass = valueType.getUnresolvedSuperClass(); |
| if (unresolvedSuperClass != null && unresolvedSuperClass.isUsingGenerics()) { |
| deepNodes.add(unresolvedSuperClass); |
| } |
| for (ClassNode node : valueType.getUnresolvedInterfaces()) { |
| if (node.isUsingGenerics()) { |
| deepNodes.add(node); |
| } |
| } |
| if (!deepNodes.isEmpty()) { |
| for (GenericsType genericsType : resolvedPlaceholders.values()) { |
| ClassNode lowerBound = genericsType.getLowerBound(); |
| if (lowerBound != null) { |
| for (ClassNode deepNode : deepNodes) { |
| if (lowerBound.equals(deepNode)) { |
| extractGenericsConnections(connections, deepNode, lowerBound); |
| } |
| } |
| } |
| ClassNode[] upperBounds = genericsType.getUpperBounds(); |
| if (upperBounds != null) { |
| for (ClassNode upperBound : upperBounds) { |
| for (ClassNode deepNode : deepNodes) { |
| if (upperBound.equals(deepNode)) { |
| extractGenericsConnections(connections, deepNode, upperBound); |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * This method will convert a closure type to the appropriate SAM type, which will be used |
| * to infer return type generics. |
| * |
| * @param closureType the inferred type of a closure (Closure<ClosureReturnType>) |
| * @param samType the type into which the closure is coerced into |
| * @return same SAM type, but completed with information from the closure node |
| */ |
| private static ClassNode convertClosureTypeToSAMType(final Expression expression, final ClassNode closureType, final ClassNode samType, final Map<GenericsTypeName, GenericsType> placeholders) { |
| if (!samType.isUsingGenerics()) return samType; |
| |
| // use the generics information from the Closure to further specify the type |
| MethodNode sam = findSAM(samType); |
| if (closureType.isUsingGenerics() && sam != null) { |
| //correct SAM type for generics |
| //sam = applyGenericsContext(placeholders, sam); |
| |
| // the return type of the SAM method exactly corresponds to the inferred return type |
| ClassNode samReturnType = sam.getReturnType(); |
| ClassNode closureReturnType = expression.getNodeMetaData(INFERRED_TYPE); |
| if (closureReturnType != null && closureReturnType.isUsingGenerics()) { |
| ClassNode unwrapped = closureReturnType.getGenericsTypes()[0].getType(); |
| extractGenericsConnections(placeholders, unwrapped, samReturnType); |
| } else if (samReturnType.isGenericsPlaceHolder()) { |
| placeholders.put(new GenericsTypeName(samReturnType.getGenericsTypes()[0].getName()), closureType.getGenericsTypes()[0]); |
| } |
| |
| // now repeat the same for each parameter given in the ClosureExpression |
| if (expression instanceof ClosureExpression && sam.getParameters().length > 0) { |
| List<ClassNode[]> genericsToConnect = new LinkedList<>(); |
| Parameter[] closureParams = ((ClosureExpression) expression).getParameters(); |
| ClassNode[] closureParamTypes = extractTypesFromParameters(closureParams); |
| if (expression.getNodeMetaData(CLOSURE_ARGUMENTS) != null) { |
| closureParamTypes = expression.getNodeMetaData(CLOSURE_ARGUMENTS); |
| } |
| Parameter[] parameters = sam.getParameters(); |
| for (int i = 0, n = parameters.length; i < n; i += 1) { |
| Parameter parameter = parameters[i]; |
| if (parameter.getOriginType().isUsingGenerics() && closureParamTypes.length > i) { |
| genericsToConnect.add(new ClassNode[]{closureParamTypes[i], parameter.getOriginType()}); |
| } |
| } |
| for (ClassNode[] classNodes : genericsToConnect) { |
| ClassNode found = classNodes[0]; |
| ClassNode expected = classNodes[1]; |
| if (!isAssignableTo(found, expected)) { |
| // probably facing a type mismatch |
| continue; |
| } |
| ClassNode generifiedType = GenericsUtils.parameterizeType(found, expected); |
| while (expected.isArray()) { |
| expected = expected.getComponentType(); |
| generifiedType = generifiedType.getComponentType(); |
| } |
| if (expected.isGenericsPlaceHolder()) { |
| placeholders.put(new GenericsTypeName(expected.getGenericsTypes()[0].getName()), new GenericsType(generifiedType)); |
| } else { |
| GenericsType[] expectedGenericsTypes = expected.getGenericsTypes(); |
| GenericsType[] foundGenericsTypes = generifiedType.getGenericsTypes(); |
| |
| for (int i = 0, n = expectedGenericsTypes.length; i < n; i += 1) { |
| GenericsType type = expectedGenericsTypes[i]; |
| if (type.isPlaceholder()) { |
| String name = type.getName(); |
| placeholders.put(new GenericsTypeName(name), foundGenericsTypes[i]); |
| } |
| } |
| } |
| } |
| } |
| } |
| ClassNode result = applyGenericsContext(placeholders, samType.redirect()); |
| return result; |
| } |
| |
| private ClassNode resolveGenericsWithContext(final Map<GenericsTypeName, GenericsType> resolvedPlaceholders, final ClassNode currentType) { |
| Map<GenericsTypeName, GenericsType> placeholdersFromContext = extractGenericsParameterMapOfThis(typeCheckingContext.getEnclosingMethod()); |
| return resolveClassNodeGenerics(resolvedPlaceholders, placeholdersFromContext, currentType); |
| } |
| |
| private static ClassNode getDeclaringClass(final MethodNode method, final Expression arguments) { |
| ClassNode declaringClass = method.getDeclaringClass(); |
| |
| // correcting declaring class for extension methods: |
| if (arguments instanceof ArgumentListExpression) { |
| ArgumentListExpression al = (ArgumentListExpression) arguments; |
| List<Expression> list = al.getExpressions(); |
| if (list.isEmpty()) return declaringClass; |
| Expression exp = list.get(0); |
| ClassNode cn = exp.getNodeMetaData(ExtensionMethodDeclaringClass.class); |
| if (cn != null) return cn; |
| } |
| return declaringClass; |
| } |
| |
| private Map<GenericsTypeName, GenericsType> resolvePlaceHoldersFromDeclaration(final ClassNode receiver, final ClassNode declaration, final MethodNode method, final boolean isStaticTarget) { |
| Map<GenericsTypeName, GenericsType> resolvedPlaceholders; |
| if (isStaticTarget && CLASS_Type.equals(receiver) && |
| receiver.isUsingGenerics() && |
| receiver.getGenericsTypes().length > 0 && |
| !OBJECT_TYPE.equals(receiver.getGenericsTypes()[0].getType())) { |
| return resolvePlaceHoldersFromDeclaration(receiver.getGenericsTypes()[0].getType(), declaration, method, isStaticTarget); |
| } else { |
| resolvedPlaceholders = extractPlaceHolders(method, receiver, declaration); |
| } |
| return resolvedPlaceholders; |
| } |
| |
| private static boolean isGenericsPlaceHolderOrArrayOf(final ClassNode cn) { |
| if (cn.isArray()) return isGenericsPlaceHolderOrArrayOf(cn.getComponentType()); |
| return cn.isGenericsPlaceHolder(); |
| } |
| |
| private static Map<GenericsTypeName, GenericsType> extractPlaceHolders(final MethodNode method, ClassNode receiver, final ClassNode declaringClass) { |
| if (declaringClass.equals(OBJECT_TYPE)) { |
| Map<GenericsTypeName, GenericsType> resolvedPlaceholders = new HashMap<>(); |
| if (method != null) addMethodLevelDeclaredGenerics(method, resolvedPlaceholders); |
| return resolvedPlaceholders; |
| } |
| |
| Map<GenericsTypeName, GenericsType> resolvedPlaceholders = null; |
| if (isPrimitiveType(receiver) && !isPrimitiveType(declaringClass)) { |
| receiver = getWrapper(receiver); |
| } |
| List<ClassNode> queue; |
| if (receiver instanceof UnionTypeClassNode) { |
| queue = Arrays.asList(((UnionTypeClassNode) receiver).getDelegates()); |
| } else { |
| queue = Collections.singletonList(receiver); |
| } |
| for (ClassNode item : queue) { |
| ClassNode current = item; |
| while (current != null) { |
| boolean continueLoop = true; |
| //extract the place holders |
| Map<GenericsTypeName, GenericsType> currentPlaceHolders = new HashMap<>(); |
| if (isGenericsPlaceHolderOrArrayOf(declaringClass) || declaringClass.equals(current)) { |
| extractGenericsConnections(currentPlaceHolders, current, declaringClass); |
| if (method != null) addMethodLevelDeclaredGenerics(method, currentPlaceHolders); |
| continueLoop = false; |
| } else { |
| GenericsUtils.extractPlaceholders(current, currentPlaceHolders); |
| } |
| |
| if (resolvedPlaceholders != null) { |
| // merge maps |
| Set<Map.Entry<GenericsTypeName, GenericsType>> entries = currentPlaceHolders.entrySet(); |
| for (Map.Entry<GenericsTypeName, GenericsType> entry : entries) { |
| GenericsType gt = entry.getValue(); |
| if (!gt.isPlaceholder()) continue; |
| GenericsType referenced = resolvedPlaceholders.get(new GenericsTypeName(gt.getName())); |
| if (referenced == null) continue; |
| entry.setValue(referenced); |
| } |
| } |
| resolvedPlaceholders = currentPlaceHolders; |
| |
| // we are done if we are now in the declaring class |
| if (!continueLoop) break; |
| |
| current = getNextSuperClass(current, declaringClass); |
| if (current == null && CLASS_Type.equals(declaringClass)) { |
| // this can happen if the receiver is Class<Foo>, then |
| // the actual receiver is Foo and declaringClass is Class |
| current = declaringClass; |
| } |
| } |
| } |
| if (resolvedPlaceholders == null) { |
| String descriptor = "<>"; |
| if (method != null) descriptor = method.getTypeDescriptor(); |
| throw new GroovyBugError( |
| "Declaring class for method call to '" + |
| descriptor + "' declared in " + declaringClass.getName() + |
| " was not matched with found receiver " + receiver.getName() + "." + |
| " This should not have happened!"); |
| } |
| return resolvedPlaceholders; |
| } |
| |
| protected boolean typeCheckMethodsWithGenericsOrFail(final ClassNode receiver, final ClassNode[] arguments, final MethodNode candidateMethod, final Expression location) { |
| if (!typeCheckMethodsWithGenerics(receiver, arguments, candidateMethod)) { |
| Map<GenericsTypeName, GenericsType> classGTs = GenericsUtils.extractPlaceholders(receiver); |
| ClassNode[] ptypes = new ClassNode[candidateMethod.getParameters().length]; |
| Parameter[] parameters = candidateMethod.getParameters(); |
| for (int i = 0, n = parameters.length; i < n; i += 1) { |
| Parameter parameter = parameters[i]; |
| ClassNode type = parameter.getType(); |
| ptypes[i] = fullyResolveType(type, classGTs); |
| } |
| addStaticTypeError("Cannot call " + toMethodGenericTypesString(candidateMethod) + receiver.toString(false) + "#" + |
| toMethodParametersString(candidateMethod.getName(), ptypes) + " with arguments " + formatArgumentList(arguments), location); |
| return false; |
| } |
| return true; |
| } |
| |
| private static String toMethodGenericTypesString(final MethodNode node) { |
| GenericsType[] genericsTypes = node.getGenericsTypes(); |
| if (genericsTypes == null) return ""; |
| return toGenericTypesString(genericsTypes); |
| } |
| |
| protected static String formatArgumentList(final ClassNode[] nodes) { |
| if (nodes == null || nodes.length == 0) return "[]"; |
| StringBuilder sb = new StringBuilder(24 * nodes.length); |
| sb.append("["); |
| for (ClassNode node : nodes) { |
| sb.append(prettyPrintType(node)); |
| sb.append(", "); |
| } |
| if (sb.length() > 1) { |
| sb.setCharAt(sb.length() - 2, ']'); |
| } |
| return sb.toString(); |
| } |
| |
| private static void putSetterInfo(final Expression exp, final SetterInfo info) { |
| exp.putNodeMetaData(SetterInfo.class, info); |
| } |
| |
| private static SetterInfo removeSetterInfo(final Expression exp) { |
| Object nodeMetaData = exp.getNodeMetaData(SetterInfo.class); |
| if (nodeMetaData != null) { |
| exp.removeNodeMetaData(SetterInfo.class); |
| return (SetterInfo) nodeMetaData; |
| } |
| return null; |
| } |
| |
| @Override |
| public void addError(final String msg, final ASTNode expr) { |
| Long err = ((long) expr.getLineNumber()) << 16 + expr.getColumnNumber(); |
| if ((DEBUG_GENERATED_CODE && expr.getLineNumber() < 0) || !typeCheckingContext.reportedErrors.contains(err)) { |
| typeCheckingContext.getErrorCollector().addErrorAndContinue(new SyntaxErrorMessage( |
| new SyntaxException(msg + '\n', expr.getLineNumber(), expr.getColumnNumber(), expr.getLastLineNumber(), expr.getLastColumnNumber()), |
| typeCheckingContext.source) |
| ); |
| typeCheckingContext.reportedErrors.add(err); |
| } |
| } |
| |
| protected void addStaticTypeError(final String msg, final ASTNode expr) { |
| if (expr.getColumnNumber() > 0 && expr.getLineNumber() > 0) { |
| addError(StaticTypesTransformation.STATIC_ERROR_PREFIX + msg, expr); |
| } else { |
| if (DEBUG_GENERATED_CODE) { |
| addError(StaticTypesTransformation.STATIC_ERROR_PREFIX + "Error in generated code [" + expr.getText() + "] - " + msg, expr); |
| } |
| // ignore errors which are related to unknown source locations |
| // because they are likely related to generated code |
| } |
| } |
| |
| protected void addNoMatchingMethodError(ClassNode receiver, final String name, final ClassNode[] args, final Expression call) { |
| if (isClassClassNodeWrappingConcreteType(receiver)) { |
| receiver = receiver.getGenericsTypes()[0].getType(); |
| } |
| addStaticTypeError("Cannot find matching method " + receiver.getText() + "#" + toMethodParametersString(name, args) + ". Please check if the declared type is correct and if the method exists.", call); |
| } |
| |
| protected void addAmbiguousErrorMessage(final List<MethodNode> foundMethods, final String name, final ClassNode[] args, final Expression expr) { |
| addStaticTypeError("Reference to method is ambiguous. Cannot choose between " + prettyPrintMethodList(foundMethods), expr); |
| } |
| |
| protected void addCategoryMethodCallError(final Expression call) { |
| addStaticTypeError("Due to their dynamic nature, usage of categories is not possible with static type checking active", call); |
| } |
| |
| protected void addAssignmentError(final ClassNode leftType, final ClassNode rightType, final Expression assignmentExpression) { |
| addStaticTypeError("Cannot assign value of type " + rightType.toString(false) + " to variable of type " + leftType.toString(false), assignmentExpression); |
| } |
| |
| protected void addUnsupportedPreOrPostfixExpressionError(final Expression expression) { |
| if (expression instanceof PostfixExpression) { |
| addStaticTypeError("Unsupported postfix operation type [" + ((PostfixExpression) expression).getOperation() + "]", expression); |
| } else if (expression instanceof PrefixExpression) { |
| addStaticTypeError("Unsupported prefix operation type [" + ((PrefixExpression) expression).getOperation() + "]", expression); |
| } else { |
| throw new IllegalArgumentException("Method should be called with a PostfixExpression or a PrefixExpression"); |
| } |
| } |
| |
| public void setMethodsToBeVisited(final Set<MethodNode> methodsToBeVisited) { |
| this.typeCheckingContext.methodsToBeVisited = methodsToBeVisited; |
| } |
| |
| public void performSecondPass() { |
| for (SecondPassExpression wrapper : typeCheckingContext.secondPassExpressions) { |
| Expression expression = wrapper.getExpression(); |
| if (expression instanceof BinaryExpression) { |
| Expression left = ((BinaryExpression) expression).getLeftExpression(); |
| if (left instanceof VariableExpression) { |
| // should always be the case |
| // this should always be the case, but adding a test is safer |
| Variable target = findTargetVariable((VariableExpression) left); |
| if (target instanceof VariableExpression) { |
| VariableExpression var = (VariableExpression) target; |
| List<ClassNode> classNodes = typeCheckingContext.closureSharedVariablesAssignmentTypes.get(var); |
| if (classNodes != null && classNodes.size() > 1) { |
| ClassNode lub = lowestUpperBound(classNodes); |
| String message = getOperationName(((BinaryExpression) expression).getOperation().getType()); |
| if (message != null) { |
| List<MethodNode> method = findMethod(lub, message, getType(((BinaryExpression) expression).getRightExpression())); |
| if (method.isEmpty()) { |
| addStaticTypeError("A closure shared variable [" + target.getName() + "] has been assigned with various types and the method" + |
| " [" + toMethodParametersString(message, getType(((BinaryExpression) expression).getRightExpression())) + "]" + |
| " does not exist in the lowest upper bound of those types: [" + |
| lub.toString(false) + "]. In general, this is a bad practice (variable reuse) because the compiler cannot" + |
| " determine safely what is the type of the variable at the moment of the call in a multithreaded context.", expression); |
| } |
| } |
| } |
| } |
| } |
| } else if (expression instanceof MethodCallExpression) { |
| MethodCallExpression call = (MethodCallExpression) expression; |
| Expression objectExpression = call.getObjectExpression(); |
| if (objectExpression instanceof VariableExpression) { |
| // this should always be the case, but adding a test is safer |
| Variable target = findTargetVariable((VariableExpression) objectExpression); |
| if (target instanceof VariableExpression) { |
| VariableExpression var = (VariableExpression) target; |
| List<ClassNode> classNodes = typeCheckingContext.closureSharedVariablesAssignmentTypes.get(var); |
| if (classNodes != null && classNodes.size() > 1) { |
| ClassNode lub = lowestUpperBound(classNodes); |
| MethodNode methodNode = call.getNodeMetaData(DIRECT_METHOD_CALL_TARGET); |
| // we must check that such a method exists on the LUB |
| Parameter[] parameters = methodNode.getParameters(); |
| ClassNode[] params = extractTypesFromParameters(parameters); |
| ClassNode[] argTypes = (ClassNode[]) wrapper.getData(); |
| List<MethodNode> method = findMethod(lub, methodNode.getName(), argTypes); |
| if (method.size() != 1) { |
| addStaticTypeError("A closure shared variable [" + target.getName() + "] has been assigned with various types and the method" + |
| " [" + toMethodParametersString(methodNode.getName(), params) + "]" + |
| " does not exist in the lowest upper bound of those types: [" + |
| lub.toString(false) + "]. In general, this is a bad practice (variable reuse) because the compiler cannot" + |
| " determine safely what is the type of the variable at the moment of the call in a multithreaded context.", call); |
| } |
| } |
| } |
| } |
| } |
| } |
| // give a chance to type checker extensions to throw errors based on information gathered afterwards |
| extension.finish(); |
| } |
| |
| protected static ClassNode[] extractTypesFromParameters(final Parameter[] parameters) { |
| return Arrays.stream(parameters).map(Parameter::getType).toArray(ClassNode[]::new); |
| } |
| |
| /** |
| * Returns a wrapped type if, and only if, the provided class node is a primitive type. |
| * This method differs from {@link ClassHelper#getWrapper(org.codehaus.groovy.ast.ClassNode)} as it will |
| * return the same instance if the provided type is not a generic type. |
| * |
| * @return the wrapped type |
| */ |
| protected static ClassNode wrapTypeIfNecessary(final ClassNode type) { |
| if (isPrimitiveType(type)) return getWrapper(type); |
| return type; |
| } |
| |
| protected static boolean isClassInnerClassOrEqualTo(final ClassNode toBeChecked, final ClassNode start) { |
| if (start == toBeChecked) return true; |
| ClassNode outer = start.getOuterClass(); |
| if (outer != null) { |
| return isClassInnerClassOrEqualTo(toBeChecked, outer); |
| } |
| return false; |
| } |
| |
| //-------------------------------------------------------------------------- |
| |
| public static class SignatureCodecFactory { |
| public static SignatureCodec getCodec(final int version, final ClassLoader classLoader) { |
| switch (version) { |
| case 1: |
| return new SignatureCodecVersion1(classLoader); |
| default: |
| return null; |
| } |
| } |
| } |
| |
| // class only used to store setter information when an expression of type |
| // a.x = foo or x=foo is found and that it corresponds to a setter call |
| private static class SetterInfo { |
| final ClassNode receiverType; |
| final String name; |
| final List<MethodNode> setters; |
| |
| private SetterInfo(final ClassNode receiverType, final String name, final List<MethodNode> setters) { |
| this.receiverType = receiverType; |
| this.setters = setters; |
| this.name = name; |
| } |
| } |
| |
| /** |
| * Wrapper for a Parameter so it can be treated like a VariableExpression |
| * and tracked in the ifElseForWhileAssignmentTracker. |
| * <p> |
| * This class purposely does not adhere to the normal equals and hashCode |
| * contract on the Object class and delegates those calls to the wrapped |
| * variable. |
| */ |
| private static class ParameterVariableExpression extends VariableExpression { |
| |
| private final Parameter parameter; |
| |
| ParameterVariableExpression(final Parameter parameter) { |
| super(parameter); |
| this.parameter = parameter; |
| ClassNode inferred = parameter.getNodeMetaData(INFERRED_TYPE); |
| if (inferred == null) { |
| inferred = infer(parameter); |
| |
| parameter.setNodeMetaData(INFERRED_TYPE, inferred); |
| } |
| } |
| |
| private static ClassNode infer(final Variable variable) { |
| ClassNode originType = variable.getOriginType(); |
| |
| if (originType.isGenericsPlaceHolder()) { |
| GenericsType[] genericsTypes = originType.getGenericsTypes(); |
| |
| if (genericsTypes != null && genericsTypes.length > 0) { |
| GenericsType gt = genericsTypes[0]; |
| ClassNode[] upperBounds = gt.getUpperBounds(); |
| |
| if (upperBounds != null && upperBounds.length > 0) { |
| return upperBounds[0]; |
| } |
| } |
| } |
| |
| return originType; |
| } |
| |
| @Override |
| public void copyNodeMetaData(final ASTNode other) { |
| parameter.copyNodeMetaData(other); |
| } |
| |
| @Override |
| public Object putNodeMetaData(final Object key, final Object value) { |
| return parameter.putNodeMetaData(key, value); |
| } |
| |
| @Override |
| public void removeNodeMetaData(final Object key) { |
| parameter.removeNodeMetaData(key); |
| } |
| |
| @Override |
| public Map<?, ?> getNodeMetaData() { |
| return parameter.getNodeMetaData(); |
| } |
| |
| @Override |
| public <T> T getNodeMetaData(final Object key) { |
| return parameter.getNodeMetaData(key); |
| } |
| |
| @Override |
| public void setNodeMetaData(final Object key, final Object value) { |
| parameter.setNodeMetaData(key, value); |
| } |
| |
| @Override |
| public int hashCode() { |
| return parameter.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(final Object other) { |
| return parameter.equals(other); |
| } |
| } |
| |
| protected class VariableExpressionTypeMemoizer extends ClassCodeVisitorSupport { |
| private final Map<VariableExpression, ClassNode> varOrigType; |
| |
| public VariableExpressionTypeMemoizer(final Map<VariableExpression, ClassNode> varOrigType) { |
| this.varOrigType = varOrigType; |
| } |
| |
| @Override |
| protected SourceUnit getSourceUnit() { |
| return typeCheckingContext.source; |
| } |
| |
| @Override |
| public void visitVariableExpression(final VariableExpression expression) { |
| super.visitVariableExpression(expression); |
| Variable var = findTargetVariable(expression); |
| if (var instanceof VariableExpression) { |
| VariableExpression ve = (VariableExpression) var; |
| varOrigType.put(ve, ve.getNodeMetaData(INFERRED_TYPE)); |
| } |
| } |
| } |
| } |