org.eclipse.jdt.internal.compiler.ast.PostfixExpression.java Source code

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Here is the source code for org.eclipse.jdt.internal.compiler.ast.PostfixExpression.java

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/*******************************************************************************
 * Copyright (c) 2000, 2009 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * 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.lookup.*;

public class PostfixExpression extends CompoundAssignment {

    public PostfixExpression(Expression lhs, Expression expression, int operator, int pos) {
        super(lhs, expression, operator, pos);
        this.sourceStart = lhs.sourceStart;
        this.sourceEnd = pos;
    }

    @Override
    public boolean checkCastCompatibility() {
        return false;
    }

    /**
     * Code generation for PostfixExpression
     *
     * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
     * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
     * @param valueRequired boolean
     */
    @Override
    public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
        // various scenarii are possible, setting an array reference,
        // a field reference, a blank final field reference, a field of an enclosing instance or
        // just a local variable.

        int pc = codeStream.position;
        ((Reference) this.lhs).generatePostIncrement(currentScope, codeStream, this, valueRequired);
        if (valueRequired) {
            codeStream.generateImplicitConversion(this.implicitConversion);
        }
        codeStream.recordPositionsFrom(pc, this.sourceStart);
    }

    @Override
    public String operatorToString() {
        switch (this.operator) {
        case PLUS:
            return "++"; //$NON-NLS-1$
        case MINUS:
            return "--"; //$NON-NLS-1$
        }
        return "unknown operator"; //$NON-NLS-1$
    }

    @Override
    public StringBuffer printExpressionNoParenthesis(int indent, StringBuffer output) {
        return this.lhs.printExpression(indent, output).append(' ').append(operatorToString());
    }

    @Override
    public boolean restrainUsageToNumericTypes() {
        return true;
    }

    @Override
    public void traverse(ASTVisitor visitor, BlockScope scope) {

        if (visitor.visit(this, scope)) {
            this.lhs.traverse(visitor, scope);
        }
        visitor.endVisit(this, scope);
    }
}