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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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
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 * accompanied this code).
 *
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package jdk.nashorn.api.tree;

/**
 * A tree node for a <a href="http://www.ecma-international.org/ecma-262/6.0/#sec-variable-statement">variable declaration statement</a>.
 *
 * For example:
 * <pre>
 *   <em>var</em> <em>name</em> [ <em>initializer</em> ] ;
 *   <em>var</em> <em>binding_pattern</em> [ <em>initializer</em> ];
 * </pre>
 *
 * @since 9
 */
public interface VariableTree extends StatementTree {
    /**
     * Returns the binding of this declaration. This is an {@link IdentifierTree}
     * for a binding identifier case (simple variable declaration).
     * This is an {@link ObjectLiteralTree} or a {@link ArrayLiteralTree} for a
     * destructuring declaration.
     *
     * @return the binding expression of this declaration
     */
    ExpressionTree getBinding();

    /**
     * Returns the initial value expression for this variable. This is
     * null if no initial value for this variable.
     *
     * @return the initial value expression
     */
    ExpressionTree getInitializer();

    /**
     * Is this a const declaration?
     *
     * @return true if this is a const declaration
     */
    boolean isConst();

    /**
     * Is this a let declaration?
     *
     * @return true if this is a let declaration
     */
    boolean isLet();
}
