/*
* Copyright (c) 1998-2010 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.quercus.expr;
import com.caucho.quercus.Location;
import com.caucho.quercus.env.Env;
import com.caucho.quercus.env.Value;
/**
* Represents a PHP pre increment expression.
*/
public class UnaryPreIncrementExpr extends AbstractUnaryExpr {
protected final int _incr;
public UnaryPreIncrementExpr(Location location, Expr expr, int incr) {
// super(expr.createRef());
super(location, expr);
_incr = incr;
}
public UnaryPreIncrementExpr(Expr expr, int incr) {
// super(expr.createRef());
super(expr);
_incr = incr;
}
@Override
public Value eval(Env env) {
return _expr.evalPreIncrement(env, _incr);
}
/**
* Return true for a double value
*/
@Override
public boolean isDouble() {
return _expr.isDouble();
}
/**
* Return true for a long value
*/
@Override
public boolean isLong() {
return _expr.isLong();
}
/**
* Return true for a number
*/
@Override
public boolean isNumber() {
return true;
}
@Override
public String toString() {
if (_incr > 0) {
return "++" + _expr;
} else {
return "--" + _expr;
}
}
}