doubleextratype.java

来自「一个查找java程序里bug的程序的源代码,该程序本身也是java写的,对提高j」· Java 代码 · 共 56 行

/*
 * Bytecode Analysis Framework
 * Copyright (C) 2003,2004 University of Maryland
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package edu.umd.cs.findbugs.ba;

import org.apache.bcel.generic.Type;

/**
 * Special type used to represent the "extra" part of a double
 * value.  We say that when a double is stored, local <i>n</i> will
 * have type double, and local <i>n+1</i> will have this
 * type.
 *
 * @author David Hovemeyer
 * @see TypeAnalysis
 * @see TypeFrame
 * @see TypeMerger
 */
public class DoubleExtraType extends Type implements ExtendedTypes {
	private static final Type theInstance = new DoubleExtraType();

	private DoubleExtraType() {
		super(T_DOUBLE_EXTRA, "<double extra>");
	}

	public int hashCode() {
		return System.identityHashCode(this);
	}

	public boolean equals(Object o) {
		return o == this;
	}

	public static final Type instance() {
		return theInstance;
	}
}

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