| /******************************************************************************* |
| * Copyright (c) 2000, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.compiler.ast; |
| |
| import org.eclipse.jdt.internal.compiler.ASTVisitor; |
| import org.eclipse.jdt.internal.compiler.codegen.*; |
| import org.eclipse.jdt.internal.compiler.flow.*; |
| import org.eclipse.jdt.internal.compiler.lookup.*; |
| |
| public class InstanceOfExpression extends OperatorExpression { |
| |
| public Expression expression; |
| public TypeReference type; |
| |
| public InstanceOfExpression( |
| Expression expression, |
| TypeReference type, |
| int operator) { |
| |
| this.expression = expression; |
| this.type = type; |
| this.bits |= operator << OperatorSHIFT; |
| this.sourceStart = expression.sourceStart; |
| this.sourceEnd = type.sourceEnd; |
| } |
| |
| public FlowInfo analyseCode( |
| BlockScope currentScope, |
| FlowContext flowContext, |
| FlowInfo flowInfo) { |
| |
| return expression |
| .analyseCode(currentScope, flowContext, flowInfo) |
| .unconditionalInits(); |
| } |
| |
| /** |
| * Code generation for instanceOfExpression |
| * |
| * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope |
| * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream |
| * @param valueRequired boolean |
| */ |
| public void generateCode( |
| BlockScope currentScope, |
| CodeStream codeStream, |
| boolean valueRequired) { |
| |
| int pc = codeStream.position; |
| expression.generateCode(currentScope, codeStream, true); |
| codeStream.instance_of(type.resolvedType); |
| if (!valueRequired) |
| codeStream.pop(); |
| codeStream.recordPositionsFrom(pc, this.sourceStart); |
| } |
| |
| public StringBuffer printExpressionNoParenthesis(int indent, StringBuffer output) { |
| |
| expression.printExpression(indent, output).append(" instanceof "); //$NON-NLS-1$ |
| return type.print(0, output); |
| } |
| /** |
| * @see org.eclipse.jdt.internal.compiler.ast.Expression#reportIllegalCast(org.eclipse.jdt.internal.compiler.lookup.Scope, org.eclipse.jdt.internal.compiler.lookup.TypeBinding, org.eclipse.jdt.internal.compiler.lookup.TypeBinding) |
| */ |
| public void reportIllegalCast(Scope scope, TypeBinding castType, TypeBinding expressionType) { |
| scope.problemReporter().notCompatibleTypesError(this, expressionType, castType); |
| } |
| public TypeBinding resolveType(BlockScope scope) { |
| |
| constant = NotAConstant; |
| TypeBinding expressionType = expression.resolveType(scope); |
| TypeBinding checkedType = type.resolveType(scope); |
| if (expressionType == null || checkedType == null) |
| return null; |
| |
| if (checkedType.isTypeVariable() || checkedType.isParameterizedType() || checkedType.isGenericType()) { |
| scope.problemReporter().illegalInstanceOfGenericType(checkedType, this); |
| } else { |
| checkCastTypesCompatibility(scope, checkedType, expressionType, null); |
| } |
| return this.resolvedType = BooleanBinding; |
| } |
| /** |
| * @see org.eclipse.jdt.internal.compiler.ast.Expression#tagAsUnnecessaryCast(Scope,TypeBinding) |
| */ |
| public void tagAsUnnecessaryCast(Scope scope, TypeBinding castType) { |
| scope.problemReporter().unnecessaryInstanceof(this, castType); |
| } |
| public void traverse(ASTVisitor visitor, BlockScope scope) { |
| |
| if (visitor.visit(this, scope)) { |
| expression.traverse(visitor, scope); |
| type.traverse(visitor, scope); |
| } |
| visitor.endVisit(this, scope); |
| } |
| } |