src/jdk/nashorn/internal/ir/BreakableNode.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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package jdk.nashorn.internal.ir;

import jdk.nashorn.internal.codegen.Label;

/**
 * This class represents a node from which control flow can execute
 * a {@code break} statement
 */
public interface BreakableNode extends LexicalContextNode, JoinPredecessor, Labels {
    /**
     * Ensure that any labels in this breakable node are unique so
     * that new jumps won't go to old parts of the tree. Used for
     * example for cloning finally blocks
     *
     * @param lc the lexical context
     * @return node after labels have been made unique
     */
    public abstract Node ensureUniqueLabels(final LexicalContext lc);

    /**
     * Check whether this can be broken out from without using a label,
     * e.g. everything but Blocks, basically
     * @return true if breakable without label
     */
    public boolean isBreakableWithoutLabel();

    /**
     * Return the break label, i.e. the location to go to on break.
     * @return the break label
     */
    public Label getBreakLabel();

}