All Downloads are FREE. Search and download functionalities are using the official Maven repository.
Please wait. This can take some minutes ...
Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $
You can buy this project and download/modify it how often you want.
org.eclipse.jdt.internal.compiler.ast.InstanceOfExpression Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2000, 2013 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 - Contribution for
* bug 383368 - [compiler][null] syntactic null analysis for field references
*******************************************************************************/
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.impl.Constant;
import org.eclipse.jdt.internal.compiler.lookup.*;
public class InstanceOfExpression extends OperatorExpression {
public Expression expression;
public TypeReference type;
public InstanceOfExpression(Expression expression, TypeReference type) {
this.expression = expression;
this.type = type;
type.bits |= IgnoreRawTypeCheck; // https://bugs.eclipse.org/bugs/show_bug.cgi?id=282141
this.bits |= INSTANCEOF << OperatorSHIFT;
this.sourceStart = expression.sourceStart;
this.sourceEnd = type.sourceEnd;
}
public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) {
LocalVariableBinding local = this.expression.localVariableBinding();
if (local != null && (local.type.tagBits & TagBits.IsBaseType) == 0) {
flowInfo = this.expression.analyseCode(currentScope, flowContext, flowInfo).
unconditionalInits();
FlowInfo initsWhenTrue = flowInfo.copy();
initsWhenTrue.markAsComparedEqualToNonNull(local);
flowContext.recordUsingNullReference(currentScope, local,
this.expression, FlowContext.CAN_ONLY_NULL | FlowContext.IN_INSTANCEOF, flowInfo);
// no impact upon enclosing try context
return FlowInfo.conditional(initsWhenTrue, flowInfo.copy());
}
if (this.expression instanceof Reference && currentScope.compilerOptions().enableSyntacticNullAnalysisForFields) {
FieldBinding field = ((Reference)this.expression).lastFieldBinding();
if (field != null && (field.type.tagBits & TagBits.IsBaseType) == 0) {
flowContext.recordNullCheckedFieldReference((Reference) this.expression, 1);
}
}
return this.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;
this.expression.generateCode(currentScope, codeStream, true);
codeStream.instance_of(this.type.resolvedType);
if (valueRequired) {
codeStream.generateImplicitConversion(this.implicitConversion);
} else {
codeStream.pop();
}
codeStream.recordPositionsFrom(pc, this.sourceStart);
}
public StringBuffer printExpressionNoParenthesis(int indent, StringBuffer output) {
this.expression.printExpression(indent, output).append(" instanceof "); //$NON-NLS-1$
return this.type.print(0, output);
}
public TypeBinding resolveType(BlockScope scope) {
this.constant = Constant.NotAConstant;
TypeBinding expressionType = this.expression.resolveType(scope);
TypeBinding checkedType = this.type.resolveType(scope, true /* check bounds*/);
if (expressionType == null || checkedType == null)
return null;
if (!checkedType.isReifiable()) {
scope.problemReporter().illegalInstanceOfGenericType(checkedType, this);
} else if (checkedType.isValidBinding()) {
// if not a valid binding, an error has already been reported for unresolved type
if ((expressionType != TypeBinding.NULL && expressionType.isBaseType()) // disallow autoboxing
|| !checkCastTypesCompatibility(scope, checkedType, expressionType, null)) {
scope.problemReporter().notCompatibleTypesError(this, expressionType, checkedType);
}
}
return this.resolvedType = TypeBinding.BOOLEAN;
}
/**
* @see org.eclipse.jdt.internal.compiler.ast.Expression#tagAsUnnecessaryCast(Scope,TypeBinding)
*/
public void tagAsUnnecessaryCast(Scope scope, TypeBinding castType) {
// null is not instanceof Type, recognize direct scenario
if (this.expression.resolvedType != TypeBinding.NULL)
scope.problemReporter().unnecessaryInstanceof(this, castType);
}
public void traverse(ASTVisitor visitor, BlockScope scope) {
if (visitor.visit(this, scope)) {
this.expression.traverse(visitor, scope);
this.type.traverse(visitor, scope);
}
visitor.endVisit(this, scope);
}
}