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/*
* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package jdk.nashorn.internal.codegen;
import java.util.ArrayDeque;
import jdk.nashorn.internal.codegen.types.Type;
/**
* Abstraction for labels, separating a label from the underlying
* byte code emitter. Also augmenting label with e.g. a name
* for easier debugging and reading code
*
* see -Dnashorn.codegen.debug, --log=codegen
*/
public class Label extends jdk.internal.org.objectweb.asm.Label {
/** Name of this label */
private final String name;
/** Type stack at this label */
private ArrayDeque<Type> stack;
/**
* Constructor
*
* @param name name of this label
*/
public Label(final String name) {
super();
this.name = name;
}
/**
* Copy constructor
*
* @param label a label to clone
*/
public Label(final Label label) {
super();
this.name = label.name;
}
ArrayDeque<Type> getStack() {
return stack;
}
void setStack(final ArrayDeque<Type> stack) {
this.stack = stack;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
String s = super.toString();
s = s.substring(1, s.length());
sb.append(name).append('_').append(Long.toHexString(Long.parseLong(s)));
return sb.toString();
}
}
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