| /******************************************************************************* |
| * Copyright (c) 2000, 2008 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 |
| *******************************************************************************/ |
| package org.eclipse.wst.jsdt.internal.compiler.ast; |
| |
| import org.eclipse.wst.jsdt.core.JavaScriptCore; |
| import org.eclipse.wst.jsdt.core.ast.IASTNode; |
| import org.eclipse.wst.jsdt.core.ast.ILocalDeclaration; |
| import org.eclipse.wst.jsdt.internal.compiler.ASTVisitor; |
| import org.eclipse.wst.jsdt.internal.compiler.classfmt.ClassFileConstants; |
| import org.eclipse.wst.jsdt.internal.compiler.flow.FlowContext; |
| import org.eclipse.wst.jsdt.internal.compiler.flow.FlowInfo; |
| import org.eclipse.wst.jsdt.internal.compiler.impl.Constant; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.ArrayBinding; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.Binding; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.BlockScope; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.CompilationUnitScope; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.ExtraCompilerModifiers; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.FunctionTypeBinding; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.LocalVariableBinding; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.MethodBinding; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.MethodScope; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.TypeBinding; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.VariableBinding; |
| |
| public class LocalDeclaration extends AbstractVariableDeclaration implements ILocalDeclaration { |
| |
| public LocalVariableBinding binding; |
| |
| public LocalDeclaration( |
| char[] name, |
| int sourceStart, |
| int sourceEnd) { |
| |
| this.name = name; |
| this.sourceStart = sourceStart; |
| this.sourceEnd = sourceEnd; |
| this.declarationEnd = sourceEnd; |
| } |
| public LocalVariableBinding getBinding() { |
| return this.binding; |
| } |
| |
| public void setBinding(LocalVariableBinding binding) { |
| this.binding=binding; |
| } |
| |
| public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) { |
| // record variable initialization if any |
| if ((flowInfo.tagBits & FlowInfo.UNREACHABLE) == 0) { |
| bits |= ASTNode.IsLocalDeclarationReachable; // only set if actually reached |
| } |
| if (this.initialization != null) { |
| int nullStatus = this.initialization.nullStatus(flowInfo); |
| flowInfo = |
| this.initialization |
| .analyseCode(currentScope, flowContext, flowInfo) |
| .unconditionalInits(); |
| if (!flowInfo.isDefinitelyAssigned(this.binding)){// for local variable debug attributes |
| this.bits |= FirstAssignmentToLocal; |
| } else { |
| this.bits &= ~FirstAssignmentToLocal; // int i = (i = 0); |
| } |
| flowInfo.markAsDefinitelyAssigned(binding); |
| if ( true){//(this.binding.type.tagBits & TagBits.IsBaseType) == 0) { |
| switch(nullStatus) { |
| case FlowInfo.NULL : |
| flowInfo.markAsDefinitelyNull(this.binding); |
| break; |
| case FlowInfo.NON_NULL : |
| flowInfo.markAsDefinitelyNonNull(this.binding); |
| break; |
| default: |
| flowInfo.markAsDefinitelyUnknown(this.binding); |
| } |
| // no need to inform enclosing try block since its locals won't get |
| // known by the finally block |
| } |
| } |
| if (this.nextLocal!=null) |
| flowInfo=this.nextLocal.analyseCode(currentScope, flowContext, flowInfo); |
| |
| return flowInfo; |
| } |
| |
| public void checkModifiers() { |
| |
| //only potential valid modifier is <<final>> |
| if (((modifiers & ExtraCompilerModifiers.AccJustFlag) & ~ClassFileConstants.AccFinal) != 0) |
| //AccModifierProblem -> other (non-visibility problem) |
| //AccAlternateModifierProblem -> duplicate modifier |
| //AccModifierProblem | AccAlternateModifierProblem -> visibility problem" |
| |
| modifiers = (modifiers & ~ExtraCompilerModifiers.AccAlternateModifierProblem) | ExtraCompilerModifiers.AccModifierProblem; |
| } |
| |
| /** |
| * @see org.eclipse.wst.jsdt.internal.compiler.ast.AbstractVariableDeclaration#getKind() |
| */ |
| public int getKind() { |
| return LOCAL_VARIABLE; |
| } |
| |
| public TypeBinding resolveVarType(BlockScope scope) |
| { |
| TypeBinding variableType = null; |
| |
| if (type!=null) |
| variableType=type.resolveType(scope, true /* check bounds*/); |
| else { |
| if (inferredType!=null) |
| variableType=inferredType.resolveType(scope,this); |
| else |
| variableType=TypeBinding.UNKNOWN; |
| } |
| |
| |
| checkModifiers(); |
| return variableType; |
| |
| } |
| public void resolve(BlockScope scope) { |
| |
| // create a binding and add it to the scope |
| TypeBinding variableType = resolveVarType(scope); |
| |
| if (this.nextLocal!=null) |
| this.nextLocal.resolve(scope); |
| if (variableType != null) { |
| if (variableType == TypeBinding.VOID) { |
| scope.problemReporter().variableTypeCannotBeVoid(this); |
| return ; |
| } |
| if (variableType.isArrayType() && ((ArrayBinding) variableType).leafComponentType == TypeBinding.VOID) { |
| scope.problemReporter().variableTypeCannotBeVoidArray(this); |
| return; |
| } |
| } |
| if (type!=null) |
| variableType=type.resolveType(scope, true /* check bounds*/); |
| else { |
| if (inferredType!=null) |
| { |
| variableType=inferredType.resolveType(scope,this); |
| } |
| else |
| variableType=TypeBinding.UNKNOWN; |
| } |
| |
| |
| checkModifiers(); |
| if (variableType != null) { |
| if (variableType == TypeBinding.VOID) { |
| scope.problemReporter().variableTypeCannotBeVoid(this); |
| return; |
| } |
| if (variableType.isArrayType() && ((ArrayBinding) variableType).leafComponentType == TypeBinding.VOID) { |
| scope.problemReporter().variableTypeCannotBeVoidArray(this); |
| return; |
| } |
| } |
| |
| |
| Binding varBinding = null; |
| if (scope.enclosingMethodScope()==null) |
| varBinding=scope.getBinding(name, Binding.VARIABLE, this, false /*do not resolve hidden field*/); |
| else |
| varBinding=scope.getLocalBinding(name, Binding.VARIABLE, this, false); |
| boolean alreadyDefined=false; |
| if (varBinding != null && varBinding.isValidBinding()){ |
| VariableBinding existingVariable=(VariableBinding)varBinding; |
| if (existingVariable.isFor(this)) |
| { |
| if (variableType!=null) |
| existingVariable.type=variableType; |
| alreadyDefined=true; |
| } |
| else |
| { |
| |
| if (existingVariable instanceof LocalVariableBinding && this.hiddenVariableDepth == 0) { |
| LocalVariableBinding localVariableBinding=(LocalVariableBinding)existingVariable; |
| if (localVariableBinding.declaringScope instanceof CompilationUnitScope && scope.enclosingMethodScope()!=null) |
| scope.problemReporter().localVariableHiding(this, existingVariable, false); |
| else |
| scope.problemReporter().redefineLocal(this); |
| } else { |
| scope.problemReporter().localVariableHiding(this, existingVariable, false); |
| } |
| } |
| } |
| |
| if ((modifiers & ClassFileConstants.AccFinal)!= 0 && this.initialization == null) { |
| modifiers |= ExtraCompilerModifiers.AccBlankFinal; |
| } |
| if (!(this.binding!=null && alreadyDefined)) |
| { |
| this.binding = new LocalVariableBinding(this, variableType, modifiers, false); |
| MethodScope methodScope = scope.enclosingMethodScope(); |
| if (methodScope!=null) |
| methodScope.addLocalVariable(binding); |
| else |
| scope.compilationUnitScope().addLocalVariable(binding); |
| } |
| this.binding.setConstant(Constant.NotAConstant); |
| // allow to recursivelly target the binding.... |
| // the correct constant is harmed if correctly computed at the end of this method |
| |
| if (variableType == null) { |
| if (initialization != null) |
| initialization.resolveType(scope); // want to report all possible errors |
| return; |
| } |
| |
| // store the constant for final locals |
| if (initialization != null) { |
| if (initialization instanceof ArrayInitializer) { |
| TypeBinding initializationType = initialization.resolveTypeExpecting(scope, variableType); |
| if (initializationType != null) { |
| ((ArrayInitializer) initialization).binding = (ArrayBinding) initializationType; |
| initialization.computeConversion(scope, variableType, initializationType); |
| } |
| } else { |
| this.initialization.setExpectedType(variableType); |
| TypeBinding initializationType = this.initialization.resolveType(scope); |
| if (initializationType != null) { |
| // if (variableType != initializationType) // must call before computeConversion() and typeMismatchError() |
| // scope.compilationUnitScope().recordTypeConversion(variableType, initializationType); |
| if (initializationType.isFunctionType()) |
| { |
| MethodBinding existingMethod = scope.findMethod(this.name, null,false); |
| if (existingMethod!=null) |
| { |
| MethodBinding functionBinding = ((FunctionTypeBinding)initializationType).functionBinding; |
| existingMethod.updateFrom(functionBinding); |
| } |
| } |
| if (variableType==TypeBinding.UNKNOWN && initializationType!=TypeBinding.NULL) |
| this.binding.type=initializationType; |
| else if (initialization.isConstantValueOfTypeAssignableToType(initializationType, variableType) |
| || variableType.isBaseType() /* && BaseTypeBinding.isWidening(variableType.id, initializationType.id)) */ |
| || initializationType.isCompatibleWith(variableType)) { |
| |
| |
| // this.initialization.computeConversion(scope, variableType, initializationType); |
| // if (initializationType.needsUncheckedConversion(variableType)) { |
| // scope.problemReporter().unsafeTypeConversion(this.initialization, initializationType, variableType); |
| // } |
| // if (this.initialization instanceof CastExpression |
| // && (this.initialization.bits & ASTNode.UnnecessaryCast) == 0) { |
| // CastExpression.checkNeedForAssignedCast(scope, variableType, (CastExpression) this.initialization); |
| // } |
| // } else if (scope.isBoxingCompatibleWith(initializationType, variableType) |
| // || (initializationType.isBaseType() // narrowing then boxing ? |
| // && scope.compilerOptions().sourceLevel >= ClassFileConstants.JDK1_5 // autoboxing |
| // && !variableType.isBaseType() |
| // && initialization.isConstantValueOfTypeAssignableToType(initializationType, scope.environment().computeBoxingType(variableType)))) { |
| // this.initialization.computeConversion(scope, variableType, initializationType); |
| // if (this.initialization instanceof CastExpression |
| // && (this.initialization.bits & ASTNode.UnnecessaryCast) == 0) { |
| // CastExpression.checkNeedForAssignedCast(scope, variableType, (CastExpression) this.initialization); |
| // } |
| } else { |
| scope.problemReporter().typeMismatchError(initializationType, variableType, this.initialization); |
| } |
| } |
| } |
| // check for assignment with no effect |
| if (this.binding == Assignment.getDirectBinding(this.initialization)) { |
| scope.problemReporter().assignmentHasNoEffect(this, this.name); |
| } |
| // change the constant in the binding when it is final |
| // (the optimization of the constant propagation will be done later on) |
| // cast from constant actual type to variable type |
| binding.setConstant( |
| binding.isFinal() |
| ? initialization.constant.castTo((variableType.id << 4) + initialization.constant.typeID()) |
| : Constant.NotAConstant); |
| } |
| // Resolve Javadoc comment if one is present |
| if (this.javadoc != null) { |
| /* |
| if (classScope != null) { |
| this.javadoc.resolve(classScope); |
| } |
| */ |
| if (scope.enclosingMethodScope()!=null) |
| this.javadoc.resolve(scope.enclosingMethodScope()); |
| else |
| this.javadoc.resolve(scope.compilationUnitScope()); |
| } |
| |
| // only resolve annotation at the end, for constant to be positionned before (96991) |
| if (JavaScriptCore.IS_ECMASCRIPT4) |
| resolveAnnotations(scope, this.annotations, this.binding); |
| } |
| public StringBuffer printStatement(int indent, StringBuffer output) { |
| if (this.javadoc != null) { |
| this.javadoc.print(indent, output); |
| } |
| return super.printStatement(indent, output); |
| } |
| |
| public void traverse(ASTVisitor visitor, BlockScope scope) { |
| |
| if (visitor.visit(this, scope)) { |
| if (this.annotations != null) { |
| int annotationsLength = this.annotations.length; |
| for (int i = 0; i < annotationsLength; i++) |
| this.annotations[i].traverse(visitor, scope); |
| } |
| if (type!=null) |
| type.traverse(visitor, scope); |
| if (initialization != null) |
| initialization.traverse(visitor, scope); |
| } |
| visitor.endVisit(this, scope); |
| if (this.nextLocal!=null) |
| this.nextLocal.traverse(visitor, scope); |
| } |
| |
| public String getTypeName() |
| { |
| if (type!=null) |
| return type.toString(); |
| if (inferredType!=null) |
| return new String(inferredType.getName()); |
| return null; |
| } |
| public int getASTType() { |
| return IASTNode.LOCAL_DECLARATION; |
| |
| } |
| } |