| /******************************************************************************* |
| * Copyright (c) 2000, 2014 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Stephan Herrmann - Contributions for |
| * bug 236385 - [compiler] Warn for potential programming problem if an object is created but not used |
| * bug 319201 - [null] no warning when unboxing SingleNameReference causes NPE |
| * bug 349326 - [1.7] new warning for missing try-with-resources |
| * bug 186342 - [compiler][null] Using annotations for null checking |
| * bug 358903 - Filter practically unimportant resource leak warnings |
| * bug 368546 - [compiler][resource] Avoid remaining false positives found when compiling the Eclipse SDK |
| * bug 370639 - [compiler][resource] restore the default for resource leak warnings |
| * bug 345305 - [compiler][null] Compiler misidentifies a case of "variable can only be null" |
| * bug 388996 - [compiler][resource] Incorrect 'potential resource leak' |
| * bug 403147 - [compiler][null] FUP of bug 400761: consolidate interaction between unboxing, NPE, and deferred checking |
| * Bug 392238 - [1.8][compiler][null] Detect semantically invalid null type annotations |
| * Bug 417295 - [1.8[[null] Massage type annotated null analysis to gel well with deep encoded type bindings. |
| * Bug 400874 - [1.8][compiler] Inference infrastructure should evolve to meet JLS8 18.x (Part G of JSR335 spec) |
| * Bug 424727 - [compiler][null] NullPointerException in nullAnnotationUnsupportedLocation(ProblemReporter.java:5708) |
| * Bug 424710 - [1.8][compiler] CCE in SingleNameReference.localVariableBinding |
| * Bug 425152 - [1.8] [compiler] Lambda Expression not resolved but flow analyzed leading to NPE. |
| * Bug 424205 - [1.8] Cannot infer type for diamond type with lambda on method invocation |
| * Bug 424415 - [1.8][compiler] Eventual resolution of ReferenceExpression is not seen to be happening. |
| * Bug 426366 - [1.8][compiler] Type inference doesn't handle multiple candidate target types in outer overload context |
| * Bug 426290 - [1.8][compiler] Inference + overloading => wrong method resolution ? |
| * Bug 426764 - [1.8] Presence of conditional expression as method argument confuses compiler |
| * Bug 424930 - [1.8][compiler] Regression: "Cannot infer type arguments" error from compiler. |
| * Bug 427483 - [Java 8] Variables in lambdas sometimes can't be resolved |
| * Bug 427438 - [1.8][compiler] NPE at org.aspectj.org.eclipse.jdt.internal.compiler.ast.ConditionalExpression.generateCode(ConditionalExpression.java:280) |
| * Bug 426996 - [1.8][inference] try to avoid method Expression.unresolve()? |
| * Bug 428352 - [1.8][compiler] Resolution errors don't always surface |
| * Bug 429203 - [1.8][compiler] NPE in AllocationExpression.binding |
| * Bug 429430 - [1.8] Lambdas and method reference infer wrong exception type with generics (RuntimeException instead of IOException) |
| * Bug 434297 - [1.8] NPE in LamdaExpression.analyseCode with lamda expression nested in a conditional expression |
| * Jesper S Moller <jesper@selskabet.org> - Contributions for |
| * bug 378674 - "The method can be declared as static" is wrong |
| * Andy Clement (GoPivotal, Inc) aclement@gopivotal.com - Contributions for |
| * Bug 383624 - [1.8][compiler] Revive code generation support for type annotations (from Olivier's work) |
| * Bug 409245 - [1.8][compiler] Type annotations dropped when call is routed through a synthetic bridge method |
| * Till Brychcy - Contributions for |
| * bug 413460 - NonNullByDefault is not inherited to Constructors when accessed via Class File |
| *******************************************************************************/ |
| package org.aspectj.org.eclipse.jdt.internal.compiler.ast; |
| |
| import static org.aspectj.org.eclipse.jdt.internal.compiler.ast.ExpressionContext.*; |
| |
| import org.aspectj.org.eclipse.jdt.core.compiler.IProblem; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.ASTVisitor; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.codegen.*; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.flow.*; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.impl.CompilerOptions; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.impl.Constant; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.*; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.problem.ProblemSeverities; |
| import org.aspectj.org.eclipse.jdt.internal.compiler.util.SimpleLookupTable; |
| |
| public class AllocationExpression extends Expression implements Invocation { |
| |
| public TypeReference type; |
| public Expression[] arguments; |
| public MethodBinding binding; // exact binding resulting from lookup |
| MethodBinding syntheticAccessor; // synthetic accessor for inner-emulation |
| public TypeReference[] typeArguments; |
| public TypeBinding[] genericTypeArguments; |
| public FieldDeclaration enumConstant; // for enum constant initializations |
| protected TypeBinding typeExpected; // for <> inference |
| public boolean inferredReturnType; |
| |
| public FakedTrackingVariable closeTracker; // when allocation a Closeable store a pre-liminary tracking variable here |
| private ExpressionContext expressionContext = VANILLA_CONTEXT; |
| |
| // hold on to this context from invocation applicability inference until invocation type inference (per method candidate): |
| private SimpleLookupTable/*<PMB,IC18>*/ inferenceContexts; |
| protected InnerInferenceHelper innerInferenceHelper; |
| |
| /** Record to keep state between different parts of resolution. */ |
| ResolutionState suspendedResolutionState; |
| class ResolutionState { |
| BlockScope scope; |
| boolean isDiamond; |
| boolean diamondNeedsDeferring; |
| boolean argsContainCast; |
| boolean cannotInferDiamond; // request the an error be reported in due time |
| TypeBinding[] argumentTypes; |
| boolean hasReportedError; |
| |
| ResolutionState(BlockScope scope, boolean isDiamond, boolean diamonNeedsDeferring, |
| boolean argsContainCast, TypeBinding[] argumentTypes) |
| { |
| this.scope = scope; |
| this.isDiamond = isDiamond; |
| this.diamondNeedsDeferring = diamonNeedsDeferring; |
| this.argsContainCast = argsContainCast; |
| this.argumentTypes = argumentTypes; |
| } |
| } |
| |
| public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) { |
| // check captured variables are initialized in current context (26134) |
| checkCapturedLocalInitializationIfNecessary((ReferenceBinding)this.binding.declaringClass.erasure(), currentScope, flowInfo); |
| |
| // process arguments |
| if (this.arguments != null) { |
| boolean analyseResources = currentScope.compilerOptions().analyseResourceLeaks; |
| boolean hasResourceWrapperType = analyseResources |
| && this.resolvedType instanceof ReferenceBinding |
| && ((ReferenceBinding)this.resolvedType).hasTypeBit(TypeIds.BitWrapperCloseable); |
| for (int i = 0, count = this.arguments.length; i < count; i++) { |
| flowInfo = |
| this.arguments[i] |
| .analyseCode(currentScope, flowContext, flowInfo) |
| .unconditionalInits(); |
| // if argument is an AutoCloseable insert info that it *may* be closed (by the target method, i.e.) |
| if (analyseResources && !hasResourceWrapperType) { // allocation of wrapped closeables is analyzed specially |
| flowInfo = FakedTrackingVariable.markPassedToOutside(currentScope, this.arguments[i], flowInfo, flowContext, false); |
| } |
| this.arguments[i].checkNPEbyUnboxing(currentScope, flowContext, flowInfo); |
| } |
| analyseArguments(currentScope, flowContext, flowInfo, this.binding, this.arguments); |
| } |
| |
| // record some dependency information for exception types |
| ReferenceBinding[] thrownExceptions; |
| if (((thrownExceptions = this.binding.thrownExceptions).length) != 0) { |
| if ((this.bits & ASTNode.Unchecked) != 0 && this.genericTypeArguments == null) { |
| // https://bugs.eclipse.org/bugs/show_bug.cgi?id=277643, align with javac on JLS 15.12.2.6 |
| thrownExceptions = currentScope.environment().convertToRawTypes(this.binding.thrownExceptions, true, true); |
| } |
| // check exception handling |
| flowContext.checkExceptionHandlers( |
| thrownExceptions, |
| this, |
| flowInfo.unconditionalCopy(), |
| currentScope); |
| } |
| |
| // after having analysed exceptions above start tracking newly allocated resource: |
| if (currentScope.compilerOptions().analyseResourceLeaks && FakedTrackingVariable.isAnyCloseable(this.resolvedType)) |
| FakedTrackingVariable.analyseCloseableAllocation(currentScope, flowInfo, this); |
| |
| if (this.binding.declaringClass.isMemberType() && !this.binding.declaringClass.isStatic()) { |
| // allocating a non-static member type without an enclosing instance of parent type |
| // https://bugs.eclipse.org/bugs/show_bug.cgi?id=335845 |
| currentScope.tagAsAccessingEnclosingInstanceStateOf(this.binding.declaringClass.enclosingType(), false /* type variable access */); |
| // Reviewed for https://bugs.eclipse.org/bugs/show_bug.cgi?id=378674 : |
| // The corresponding problem (when called from static) is not produced until during code generation |
| } |
| manageEnclosingInstanceAccessIfNecessary(currentScope, flowInfo); |
| manageSyntheticAccessIfNecessary(currentScope, flowInfo); |
| |
| // account for possible exceptions thrown by the constructor |
| flowContext.recordAbruptExit(); // TODO whitelist of ctors that cannot throw any exc.?? |
| |
| return flowInfo; |
| } |
| |
| public void checkCapturedLocalInitializationIfNecessary(ReferenceBinding checkedType, BlockScope currentScope, FlowInfo flowInfo) { |
| if (((checkedType.tagBits & ( TagBits.AnonymousTypeMask|TagBits.LocalTypeMask)) == TagBits.LocalTypeMask) |
| && !currentScope.isDefinedInType(checkedType)) { // only check external allocations |
| NestedTypeBinding nestedType = (NestedTypeBinding) checkedType; |
| SyntheticArgumentBinding[] syntheticArguments = nestedType.syntheticOuterLocalVariables(); |
| if (syntheticArguments != null) |
| for (int i = 0, count = syntheticArguments.length; i < count; i++){ |
| SyntheticArgumentBinding syntheticArgument = syntheticArguments[i]; |
| LocalVariableBinding targetLocal; |
| if ((targetLocal = syntheticArgument.actualOuterLocalVariable) == null) continue; |
| if (targetLocal.declaration != null && !flowInfo.isDefinitelyAssigned(targetLocal)){ |
| currentScope.problemReporter().uninitializedLocalVariable(targetLocal, this); |
| } |
| } |
| } |
| } |
| |
| public Expression enclosingInstance() { |
| return null; |
| } |
| |
| public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) { |
| if (!valueRequired) |
| currentScope.problemReporter().unusedObjectAllocation(this); |
| |
| int pc = codeStream.position; |
| MethodBinding codegenBinding = this.binding.original(); |
| // AspectJ Extension |
| // was ReferenceBinding allocatedType = this.codegenBinding.declaringClass; |
| ReferenceBinding allocatedType; |
| if (syntheticAccessor != null) { |
| allocatedType = syntheticAccessor.declaringClass; |
| } else { |
| if (codegenBinding == null) codegenBinding = binding.original(); // just in case (see pr112783) |
| allocatedType = codegenBinding.declaringClass; |
| } |
| // End AspectJ Extension |
| |
| codeStream.new_(this.type, allocatedType); |
| boolean isUnboxing = (this.implicitConversion & TypeIds.UNBOXING) != 0; |
| if (valueRequired || isUnboxing) { |
| codeStream.dup(); |
| } |
| // better highlight for allocation: display the type individually |
| if (this.type != null) { // null for enum constant body |
| codeStream.recordPositionsFrom(pc, this.type.sourceStart); |
| } else { |
| // push enum constant name and ordinal |
| codeStream.ldc(String.valueOf(this.enumConstant.name)); |
| codeStream.generateInlinedValue(this.enumConstant.binding.id); |
| } |
| |
| // handling innerclass instance allocation - enclosing instance arguments |
| if (allocatedType.isNestedType()) { |
| codeStream.generateSyntheticEnclosingInstanceValues( |
| currentScope, |
| allocatedType, |
| enclosingInstance(), |
| this); |
| } |
| // generate the arguments for constructor |
| generateArguments(this.binding, this.arguments, currentScope, codeStream); |
| // handling innerclass instance allocation - outer local arguments |
| if (allocatedType.isNestedType()) { |
| codeStream.generateSyntheticOuterArgumentValues( |
| currentScope, |
| allocatedType, |
| this); |
| } |
| // invoke constructor |
| if (this.syntheticAccessor == null) { |
| codeStream.invoke(Opcodes.OPC_invokespecial, codegenBinding, null /* default declaringClass */, this.typeArguments); |
| } else { |
| // synthetic accessor got some extra arguments appended to its signature, which need values |
| for (int i = 0, |
| max = this.syntheticAccessor.parameters.length - codegenBinding.parameters.length; |
| i < max; |
| i++) { |
| codeStream.aconst_null(); |
| } |
| codeStream.invoke(Opcodes.OPC_invokespecial, this.syntheticAccessor, null /* default declaringClass */, this.typeArguments); |
| } |
| if (valueRequired) { |
| codeStream.generateImplicitConversion(this.implicitConversion); |
| } else if (isUnboxing) { |
| // conversion only generated if unboxing |
| codeStream.generateImplicitConversion(this.implicitConversion); |
| switch (postConversionType(currentScope).id) { |
| case T_long : |
| case T_double : |
| codeStream.pop2(); |
| break; |
| default : |
| codeStream.pop(); |
| } |
| } |
| codeStream.recordPositionsFrom(pc, this.sourceStart); |
| } |
| |
| /** |
| * @see org.aspectj.org.eclipse.jdt.internal.compiler.lookup.InvocationSite#genericTypeArguments() |
| */ |
| public TypeBinding[] genericTypeArguments() { |
| return this.genericTypeArguments; |
| } |
| |
| public boolean isSuperAccess() { |
| return false; |
| } |
| |
| public boolean isTypeAccess() { |
| return true; |
| } |
| |
| /* Inner emulation consists in either recording a dependency |
| * link only, or performing one level of propagation. |
| * |
| * Dependency mechanism is used whenever dealing with source target |
| * types, since by the time we reach them, we might not yet know their |
| * exact need. |
| */ |
| public void manageEnclosingInstanceAccessIfNecessary(BlockScope currentScope, FlowInfo flowInfo) { |
| if ((flowInfo.tagBits & FlowInfo.UNREACHABLE_OR_DEAD) != 0) return; |
| ReferenceBinding allocatedTypeErasure = (ReferenceBinding) this.binding.declaringClass.erasure(); |
| |
| // perform some emulation work in case there is some and we are inside a local type only |
| if (allocatedTypeErasure.isNestedType() |
| && currentScope.enclosingSourceType().isLocalType()) { |
| |
| if (allocatedTypeErasure.isLocalType()) { |
| ((LocalTypeBinding) allocatedTypeErasure).addInnerEmulationDependent(currentScope, false); |
| // request cascade of accesses |
| } else { |
| // locally propagate, since we already now the desired shape for sure |
| currentScope.propagateInnerEmulation(allocatedTypeErasure, false); |
| // request cascade of accesses |
| } |
| } |
| } |
| |
| public void manageSyntheticAccessIfNecessary(BlockScope currentScope, FlowInfo flowInfo) { |
| // AspectJ Extension |
| if (binding.alwaysNeedsAccessMethod()) { |
| // MethodBinding codegenBinding = this.binding.original(); |
| syntheticAccessor = binding.getAccessMethod(true); |
| // this.codegenBinding = binding.original(); |
| return; |
| } |
| // End AspectJ Extension |
| |
| if ((flowInfo.tagBits & FlowInfo.UNREACHABLE_OR_DEAD) != 0) return; |
| // if constructor from parameterized type got found, use the original constructor at codegen time |
| MethodBinding codegenBinding = this.binding.original(); |
| |
| ReferenceBinding declaringClass; |
| if (codegenBinding.isPrivate() && TypeBinding.notEquals(currentScope.enclosingSourceType(), (declaringClass = codegenBinding.declaringClass))) { |
| |
| // from 1.4 on, local type constructor can lose their private flag to ease emulation |
| if ((declaringClass.tagBits & TagBits.IsLocalType) != 0 && currentScope.compilerOptions().complianceLevel >= ClassFileConstants.JDK1_4) { |
| // constructor will not be dumped as private, no emulation required thus |
| codegenBinding.tagBits |= TagBits.ClearPrivateModifier; |
| } else { |
| this.syntheticAccessor = ((SourceTypeBinding) declaringClass).addSyntheticMethod(codegenBinding, isSuperAccess()); |
| currentScope.problemReporter().needToEmulateMethodAccess(codegenBinding, this); |
| } |
| } |
| } |
| |
| public StringBuffer printExpression(int indent, StringBuffer output) { |
| if (this.type != null) { // type null for enum constant initializations |
| output.append("new "); //$NON-NLS-1$ |
| } |
| if (this.typeArguments != null) { |
| output.append('<'); |
| int max = this.typeArguments.length - 1; |
| for (int j = 0; j < max; j++) { |
| this.typeArguments[j].print(0, output); |
| output.append(", ");//$NON-NLS-1$ |
| } |
| this.typeArguments[max].print(0, output); |
| output.append('>'); |
| } |
| if (this.type != null) { // type null for enum constant initializations |
| this.type.printExpression(0, output); |
| } |
| output.append('('); |
| if (this.arguments != null) { |
| for (int i = 0; i < this.arguments.length; i++) { |
| if (i > 0) output.append(", "); //$NON-NLS-1$ |
| this.arguments[i].printExpression(0, output); |
| } |
| } |
| return output.append(')'); |
| } |
| |
| public TypeBinding resolveType(BlockScope scope) { |
| // Propagate the type checking to the arguments, and check if the constructor is defined. |
| final boolean isDiamond = this.type != null && (this.type.bits & ASTNode.IsDiamond) != 0; |
| final CompilerOptions compilerOptions = scope.compilerOptions(); |
| boolean diamondNeedsDeferring = false; |
| long sourceLevel = compilerOptions.sourceLevel; |
| if (this.constant != Constant.NotAConstant) { |
| this.constant = Constant.NotAConstant; |
| if (this.type == null) { |
| // initialization of an enum constant |
| this.resolvedType = scope.enclosingReceiverType(); |
| } else { |
| this.resolvedType = this.type.resolveType(scope, true /* check bounds*/); |
| if (isDiamond && this.typeExpected == null && this.expressionContext == INVOCATION_CONTEXT && sourceLevel >= ClassFileConstants.JDK1_8) { |
| if (this.resolvedType != null && this.resolvedType.isValidBinding()) |
| diamondNeedsDeferring = true; |
| } |
| } |
| } else { |
| this.resolvedType = this.type.resolvedType; |
| } |
| |
| if (this.type != null) { |
| checkIllegalNullAnnotation(scope, this.resolvedType); |
| checkParameterizedAllocation: { |
| if (this.type instanceof ParameterizedQualifiedTypeReference) { // disallow new X<String>.Y<Integer>() |
| ReferenceBinding currentType = (ReferenceBinding)this.resolvedType; |
| if (currentType == null) return currentType; |
| do { |
| // isStatic() is answering true for toplevel types |
| if ((currentType.modifiers & ClassFileConstants.AccStatic) != 0) break checkParameterizedAllocation; |
| if (currentType.isRawType()) break checkParameterizedAllocation; |
| } while ((currentType = currentType.enclosingType())!= null); |
| ParameterizedQualifiedTypeReference qRef = (ParameterizedQualifiedTypeReference) this.type; |
| for (int i = qRef.typeArguments.length - 2; i >= 0; i--) { |
| if (qRef.typeArguments[i] != null) { |
| scope.problemReporter().illegalQualifiedParameterizedTypeAllocation(this.type, this.resolvedType); |
| break; |
| } |
| } |
| } |
| } |
| } |
| // will check for null after args are resolved |
| |
| // resolve type arguments (for generic constructor call) |
| if (this.typeArguments != null) { |
| int length = this.typeArguments.length; |
| boolean argHasError = sourceLevel < ClassFileConstants.JDK1_5; |
| this.genericTypeArguments = new TypeBinding[length]; |
| for (int i = 0; i < length; i++) { |
| TypeReference typeReference = this.typeArguments[i]; |
| if ((this.genericTypeArguments[i] = typeReference.resolveType(scope, true /* check bounds*/)) == null) { |
| argHasError = true; |
| } |
| if (argHasError && typeReference instanceof Wildcard) { |
| scope.problemReporter().illegalUsageOfWildcard(typeReference); |
| } |
| } |
| if (isDiamond) { |
| scope.problemReporter().diamondNotWithExplicitTypeArguments(this.typeArguments); |
| return null; |
| } |
| if (argHasError) { |
| if (this.arguments != null) { // still attempt to resolve arguments |
| for (int i = 0, max = this.arguments.length; i < max; i++) { |
| this.arguments[i].resolveType(scope); |
| } |
| } |
| return null; |
| } |
| } |
| |
| // buffering the arguments' types |
| boolean argsContainCast = false; |
| TypeBinding[] argumentTypes = Binding.NO_PARAMETERS; |
| if (this.arguments != null) { |
| boolean argHasError = false; |
| int length = this.arguments.length; |
| argumentTypes = new TypeBinding[length]; |
| for (int i = 0; i < length; i++) { |
| Expression argument = this.arguments[i]; |
| if (argument instanceof CastExpression) { |
| argument.bits |= DisableUnnecessaryCastCheck; // will check later on |
| argsContainCast = true; |
| } |
| argument.setExpressionContext(INVOCATION_CONTEXT); |
| if (this.arguments[i].resolvedType != null) |
| scope.problemReporter().genericInferenceError("Argument was unexpectedly found resolved", this); //$NON-NLS-1$ |
| if ((argumentTypes[i] = argument.resolveType(scope)) == null) { |
| argHasError = true; |
| } |
| if (sourceLevel >= ClassFileConstants.JDK1_8 && argument.isPolyExpression()) { |
| if (this.innerInferenceHelper == null) |
| this.innerInferenceHelper = new InnerInferenceHelper(); |
| } |
| } |
| if (argHasError) { |
| /* https://bugs.eclipse.org/bugs/show_bug.cgi?id=345359, if arguments have errors, completely bail out in the <> case. |
| No meaningful type resolution is possible since inference of the elided types is fully tied to argument types. Do |
| not return the partially resolved type. |
| */ |
| if (isDiamond) { |
| return null; // not the partially cooked this.resolvedType |
| } |
| if (this.resolvedType instanceof ReferenceBinding) { |
| // record a best guess, for clients who need hint about possible constructor match |
| TypeBinding[] pseudoArgs = new TypeBinding[length]; |
| for (int i = length; --i >= 0;) { |
| pseudoArgs[i] = argumentTypes[i] == null ? TypeBinding.NULL : argumentTypes[i]; // replace args with errors with null type |
| } |
| this.binding = scope.findMethod((ReferenceBinding) this.resolvedType, TypeConstants.INIT, pseudoArgs, this, false); |
| if (this.binding != null && !this.binding.isValidBinding()) { |
| MethodBinding closestMatch = ((ProblemMethodBinding)this.binding).closestMatch; |
| // record the closest match, for clients who may still need hint about possible method match |
| if (closestMatch != null) { |
| if (closestMatch.original().typeVariables != Binding.NO_TYPE_VARIABLES) { // generic method |
| // shouldn't return generic method outside its context, rather convert it to raw method (175409) |
| closestMatch = scope.environment().createParameterizedGenericMethod(closestMatch.original(), (RawTypeBinding)null); |
| } |
| this.binding = closestMatch; |
| MethodBinding closestMatchOriginal = closestMatch.original(); |
| if (closestMatchOriginal.isOrEnclosedByPrivateType() && !scope.isDefinedInMethod(closestMatchOriginal)) { |
| // ignore cases where method is used from within inside itself (e.g. direct recursions) |
| closestMatchOriginal.modifiers |= ExtraCompilerModifiers.AccLocallyUsed; |
| } |
| } |
| } |
| } |
| return this.resolvedType; |
| } |
| } |
| if (this.resolvedType == null || !this.resolvedType.isValidBinding()) { |
| return null; |
| } |
| |
| // null type denotes fake allocation for enum constant inits |
| if (this.type != null && !this.resolvedType.canBeInstantiated()) { |
| scope.problemReporter().cannotInstantiate(this.type, this.resolvedType); |
| return this.resolvedType; |
| } |
| ResolutionState state = new ResolutionState(scope, isDiamond, diamondNeedsDeferring, argsContainCast, argumentTypes); |
| if (diamondNeedsDeferring) { |
| this.suspendedResolutionState = state; // resolving to be continued later (via binding(TypeBinding targetType)). |
| return new PolyTypeBinding(this); |
| } |
| |
| if (!resolvePart2(state)) |
| return null; |
| return resolvePart3(state); |
| } |
| |
| /** Second part of resolving that may happen multiple times during overload resolution. */ |
| boolean resolvePart2(ResolutionState state) { |
| // TODO: all information persisted during this method may need to be stored per targetType? |
| if (state.isDiamond) { |
| ReferenceBinding genericType = ((ParameterizedTypeBinding) this.resolvedType).genericType(); |
| TypeBinding [] inferredTypes = inferElidedTypes((ParameterizedTypeBinding) this.resolvedType, this.resolvedType.enclosingType(), state.argumentTypes, state.scope); |
| if (inferredTypes == null) { |
| if (!state.diamondNeedsDeferring) { |
| state.scope.problemReporter().cannotInferElidedTypes(this); |
| state.hasReportedError = true; |
| this.resolvedType = null; |
| } else { |
| state.cannotInferDiamond = true; // defer reporting |
| } |
| return false; |
| } |
| this.resolvedType = this.type.resolvedType = state.scope.environment().createParameterizedType(genericType, inferredTypes, ((ParameterizedTypeBinding) this.resolvedType).enclosingType()); |
| state.cannotInferDiamond = false; |
| } |
| ReferenceBinding receiverType = (ReferenceBinding) this.resolvedType; |
| this.binding = findConstructorBinding(state.scope, this, receiverType, state.argumentTypes); |
| return true; |
| } |
| |
| /** Final part of resolving (once): check and report various error conditions. */ |
| TypeBinding resolvePart3(ResolutionState state) { |
| if (this.suspendedResolutionState != null && this.suspendedResolutionState.hasReportedError) |
| return this.resolvedType; |
| this.suspendedResolutionState = null; |
| if (state.cannotInferDiamond) { |
| state.scope.problemReporter().cannotInferElidedTypes(this); |
| return this.resolvedType = null; |
| } |
| ReferenceBinding allocationType = (ReferenceBinding) this.resolvedType; |
| if (!this.binding.isValidBinding()) { |
| if (this.binding.declaringClass == null) { |
| this.binding.declaringClass = allocationType; |
| } |
| if (this.type != null && !this.type.resolvedType.isValidBinding()) { |
| return null; |
| } |
| state.scope.problemReporter().invalidConstructor(this, this.binding); |
| return this.resolvedType; |
| } |
| if ((this.binding.tagBits & TagBits.HasMissingType) != 0) { |
| state.scope.problemReporter().missingTypeInConstructor(this, this.binding); |
| } |
| if (isMethodUseDeprecated(this.binding, state.scope, true)) { |
| state.scope.problemReporter().deprecatedMethod(this.binding, this); |
| } |
| if (checkInvocationArguments(state.scope, null, allocationType, this.binding, this.arguments, state.argumentTypes, state.argsContainCast, this)) { |
| this.bits |= ASTNode.Unchecked; |
| } |
| if (this.typeArguments != null && this.binding.original().typeVariables == Binding.NO_TYPE_VARIABLES) { |
| state.scope.problemReporter().unnecessaryTypeArgumentsForMethodInvocation(this.binding, this.genericTypeArguments, this.typeArguments); |
| } |
| if (!state.isDiamond && this.resolvedType.isParameterizedTypeWithActualArguments()) { |
| checkTypeArgumentRedundancy((ParameterizedTypeBinding) this.resolvedType, this.resolvedType.enclosingType(), state.argumentTypes, state.scope); |
| } |
| CompilerOptions compilerOptions = state.scope.compilerOptions(); |
| if (compilerOptions.isAnnotationBasedNullAnalysisEnabled && (this.binding.tagBits & TagBits.IsNullnessKnown) == 0) { |
| new ImplicitNullAnnotationVerifier(state.scope.environment(), compilerOptions.inheritNullAnnotations) |
| .checkImplicitNullAnnotations(this.binding, null/*srcMethod*/, false, state.scope); |
| } |
| recordExceptionsForEnclosingLambda(state.scope, this.binding.thrownExceptions); |
| return allocationType; |
| } |
| |
| /** |
| * Check if 'allocationType' illegally has a top-level null annotation. |
| */ |
| void checkIllegalNullAnnotation(BlockScope scope, TypeBinding allocationType) { |
| if (allocationType != null) { |
| // only check top-level null annotation (annots on details are OK): |
| long nullTagBits = allocationType.tagBits & TagBits.AnnotationNullMASK; |
| if (nullTagBits != 0) { |
| Annotation annotation = this.type.findAnnotation(nullTagBits); |
| if (annotation != null) |
| scope.problemReporter().nullAnnotationUnsupportedLocation(annotation); |
| } |
| } |
| } |
| |
| public TypeBinding[] inferElidedTypes(ParameterizedTypeBinding allocationType, ReferenceBinding enclosingType, TypeBinding[] argumentTypes, final BlockScope scope) { |
| /* Given the allocation type and the arguments to the constructor, see if we can synthesize a generic static factory |
| method that would, given the argument types and the invocation site, manufacture a parameterized object of type allocationType. |
| If we are successful then by design and construction, the parameterization of the return type of the factory method is identical |
| to the types elided in the <>. |
| */ |
| MethodBinding factory = scope.getStaticFactory(allocationType, enclosingType, argumentTypes, this); |
| if (factory instanceof ParameterizedGenericMethodBinding && factory.isValidBinding()) { |
| ParameterizedGenericMethodBinding genericFactory = (ParameterizedGenericMethodBinding) factory; |
| this.inferredReturnType = genericFactory.inferredReturnType; |
| // this is our last chance to inspect the result of the inference that is connected to the throw-away factory binding |
| InferenceContext18 infCtx18 = getInferenceContext(genericFactory); |
| if (infCtx18 != null && infCtx18.stepCompleted == InferenceContext18.BINDINGS_UPDATED) { |
| // refresh argumentTypes from updated bindings in arguments: |
| // (this shouldn't be strictly necessary, as FunctionExpression.isCompatibleWith() should give the same result, |
| // but it's probably be a good idea to avoid the necessity to call isCompatibleWith() in the first place). |
| for (int i = 0; i < argumentTypes.length; i++) { |
| if (argumentTypes[i] instanceof PolyTypeBinding) |
| argumentTypes[i] = this.arguments[i].resolvedType; |
| } |
| } |
| return ((ParameterizedTypeBinding)factory.returnType).arguments; |
| } |
| return null; |
| } |
| |
| public void checkTypeArgumentRedundancy(ParameterizedTypeBinding allocationType, ReferenceBinding enclosingType, TypeBinding[] argumentTypes, final BlockScope scope) { |
| if ((scope.problemReporter().computeSeverity(IProblem.RedundantSpecificationOfTypeArguments) == ProblemSeverities.Ignore) || scope.compilerOptions().sourceLevel < ClassFileConstants.JDK1_7) return; |
| if (allocationType.arguments == null) return; // raw binding |
| if (this.genericTypeArguments != null) return; // diamond can't occur with explicit type args for constructor |
| if (this.type == null) return; |
| if (argumentTypes == Binding.NO_PARAMETERS && this.typeExpected instanceof ParameterizedTypeBinding) { |
| ParameterizedTypeBinding expected = (ParameterizedTypeBinding) this.typeExpected; |
| if (expected.arguments != null && allocationType.arguments.length == expected.arguments.length) { |
| // check the case when no ctor takes no params and inference uses the expected type directly |
| // eg. X<String> x = new X<String>() |
| int i; |
| for (i = 0; i < allocationType.arguments.length; i++) { |
| if (TypeBinding.notEquals(allocationType.arguments[i], expected.arguments[i])) |
| break; |
| } |
| if (i == allocationType.arguments.length) { |
| scope.problemReporter().redundantSpecificationOfTypeArguments(this.type, allocationType.arguments); |
| return; |
| } |
| } |
| } |
| TypeBinding [] inferredTypes; |
| int previousBits = this.type.bits; |
| try { |
| // checking for redundant type parameters must fake a diamond, |
| // so we infer the same results as we would get with a diamond in source code: |
| this.type.bits |= IsDiamond; |
| inferredTypes = inferElidedTypes(allocationType, enclosingType, argumentTypes, scope); |
| } finally { |
| // reset effects of inference |
| this.type.bits = previousBits; |
| } |
| if (inferredTypes == null) { |
| return; |
| } |
| for (int i = 0; i < inferredTypes.length; i++) { |
| if (TypeBinding.notEquals(inferredTypes[i], allocationType.arguments[i])) |
| return; |
| } |
| scope.problemReporter().redundantSpecificationOfTypeArguments(this.type, allocationType.arguments); |
| } |
| |
| public void setActualReceiverType(ReferenceBinding receiverType) { |
| // ignored |
| } |
| |
| public void setDepth(int i) { |
| // ignored |
| } |
| |
| public void setFieldIndex(int i) { |
| // ignored |
| } |
| |
| public void traverse(ASTVisitor visitor, BlockScope scope) { |
| if (visitor.visit(this, scope)) { |
| if (this.typeArguments != null) { |
| for (int i = 0, typeArgumentsLength = this.typeArguments.length; i < typeArgumentsLength; i++) { |
| this.typeArguments[i].traverse(visitor, scope); |
| } |
| } |
| if (this.type != null) { // enum constant scenario |
| this.type.traverse(visitor, scope); |
| } |
| if (this.arguments != null) { |
| for (int i = 0, argumentsLength = this.arguments.length; i < argumentsLength; i++) |
| this.arguments[i].traverse(visitor, scope); |
| } |
| } |
| visitor.endVisit(this, scope); |
| } |
| /** |
| * @see org.aspectj.org.eclipse.jdt.internal.compiler.ast.Expression#setExpectedType(org.aspectj.org.eclipse.jdt.internal.compiler.lookup.TypeBinding) |
| */ |
| public void setExpectedType(TypeBinding expectedType) { |
| this.typeExpected = expectedType; |
| } |
| |
| public void setExpressionContext(ExpressionContext context) { |
| this.expressionContext = context; |
| } |
| |
| public boolean isPolyExpression() { |
| return isPolyExpression(this.binding); |
| } |
| public boolean isPolyExpression(MethodBinding method) { |
| return (this.expressionContext == ASSIGNMENT_CONTEXT || this.expressionContext == INVOCATION_CONTEXT) && |
| this.type != null && (this.type.bits & ASTNode.IsDiamond) != 0; |
| } |
| |
| /** |
| * @see org.aspectj.org.eclipse.jdt.internal.compiler.lookup.InvocationSite#invocationTargetType() |
| */ |
| public TypeBinding invocationTargetType() { |
| return this.typeExpected; |
| } |
| |
| public boolean statementExpression() { |
| return true; |
| } |
| |
| //-- interface Invocation: -- |
| public MethodBinding binding(TypeBinding targetType, boolean reportErrors, Scope scope) { |
| if (this.suspendedResolutionState != null && targetType != null) { |
| setExpectedType(targetType); |
| if (!resolvePart2(this.suspendedResolutionState)) { |
| if (reportErrors && !this.suspendedResolutionState.hasReportedError) { |
| if (this.suspendedResolutionState.cannotInferDiamond) |
| scope.problemReporter().cannotInferElidedTypes(this); |
| else |
| scope.problemReporter().genericInferenceError("constructor is unexpectedly unresolved", this); //$NON-NLS-1$ |
| this.suspendedResolutionState.hasReportedError = true; |
| } |
| return null; |
| } |
| } |
| if (reportErrors && this.binding != null && !this.binding.isValidBinding()) { |
| if (this.binding.declaringClass == null) |
| this.binding.declaringClass = (ReferenceBinding) this.resolvedType; |
| if (this.suspendedResolutionState != null) { |
| scope.problemReporter().invalidConstructor(this, this.binding); |
| this.suspendedResolutionState.hasReportedError = true; |
| } |
| } |
| return this.binding; |
| } |
| public TypeBinding checkAgainstFinalTargetType(TypeBinding targetType, Scope scope) { |
| // confer MessageSend.checkAgainstFinalTargetType(,,): |
| if (this.binding instanceof ParameterizedGenericMethodBinding) { |
| InferenceContext18 ctx = getInferenceContext((ParameterizedMethodBinding) this.binding); |
| if (ctx != null && ctx.stepCompleted < InferenceContext18.TYPE_INFERRED) { |
| this.typeExpected = targetType; |
| MethodBinding updatedBinding = ctx.inferInvocationType(this, (ParameterizedGenericMethodBinding) this.binding); |
| if (updateBindings(updatedBinding, targetType)) { |
| ASTNode.resolvePolyExpressionArguments(this, updatedBinding, scope); |
| } |
| } |
| } |
| if (this.suspendedResolutionState != null) { |
| return resolvePart3(this.suspendedResolutionState); |
| } |
| return this.resolvedType; |
| } |
| public Expression[] arguments() { |
| return this.arguments; |
| } |
| |
| public boolean updateBindings(MethodBinding updatedBinding, TypeBinding targetType) { |
| boolean hasUpdate = this.binding != updatedBinding; |
| if (this.inferenceContexts != null && this.binding.original() == updatedBinding.original()) { |
| InferenceContext18 ctx = (InferenceContext18)this.inferenceContexts.get(this.binding); |
| if (ctx != null && updatedBinding instanceof ParameterizedGenericMethodBinding) { |
| this.inferenceContexts.put(updatedBinding, ctx); |
| // solution may have come from an outer inference, mark now that this (inner) is done (but not deep inners): |
| hasUpdate |= ctx.registerSolution(targetType, updatedBinding); |
| } |
| } |
| this.binding = updatedBinding; |
| this.resolvedType = updatedBinding.declaringClass; |
| return hasUpdate; |
| } |
| public void registerInferenceContext(ParameterizedGenericMethodBinding method, InferenceContext18 infCtx18) { |
| if (this.inferenceContexts == null) |
| this.inferenceContexts = new SimpleLookupTable(); |
| this.inferenceContexts.put(method, infCtx18); |
| MethodBinding original = method.original(); |
| if (original instanceof SyntheticFactoryMethodBinding) { |
| SyntheticFactoryMethodBinding synthOriginal = (SyntheticFactoryMethodBinding)original; |
| ParameterizedMethodBinding parameterizedCtor = synthOriginal.applyTypeArgumentsOnConstructor(method.typeArguments); |
| this.inferenceContexts.put(parameterizedCtor, infCtx18); |
| } |
| } |
| public boolean usesInference() { |
| return (this.binding instanceof ParameterizedGenericMethodBinding) |
| && getInferenceContext((ParameterizedGenericMethodBinding) this.binding) != null; |
| } |
| public InferenceContext18 getInferenceContext(ParameterizedMethodBinding method) { |
| if (this.inferenceContexts == null) |
| return null; |
| return (InferenceContext18) this.inferenceContexts.get(method); |
| } |
| public boolean innersNeedUpdate() { |
| return this.innerInferenceHelper != null; |
| } |
| public void innerUpdateDone() { |
| this.innerInferenceHelper = null; |
| } |
| public InnerInferenceHelper innerInferenceHelper() { |
| return this.innerInferenceHelper; |
| } |
| |
| //-- interface InvocationSite: -- |
| public ExpressionContext getExpressionContext() { |
| return this.expressionContext; |
| } |
| public InferenceContext18 freshInferenceContext(Scope scope) { |
| return new InferenceContext18(scope, this.arguments, this); |
| } |
| } |