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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * 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,

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 *

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package jdk.nashorn.api.tree;

import jdk.nashorn.internal.ir.ExpressionStatement;

import jdk.nashorn.internal.parser.TokenType;

// This implementation of VariableTree represents a destructuring declaration

final class DestructuringDeclTreeImpl extends StatementTreeImpl

        implements VariableTree {

    private final TokenType declType;

    private final ExpressionTree lhs;

    private final ExpressionTree init;

    DestructuringDeclTreeImpl(final ExpressionStatement exprStat, final ExpressionTree lhs, final ExpressionTree init) {

        super(exprStat);

        assert exprStat.destructuringDeclarationType() != null : "expecting a destructuring decl. statement";

        this.declType = exprStat.destructuringDeclarationType();

        this.lhs = lhs;

        this.init = init;

    }

    @Override

    public Kind getKind() {

        return Kind.VARIABLE;

    }

    @Override

    public ExpressionTree getBinding() {

        return lhs;

    }

    @Override

    public ExpressionTree getInitializer() {

        return init;

    }

    @Override

    public boolean isConst() {

        return declType == TokenType.CONST;

    }

    @Override

    public boolean isLet() {

        return declType == TokenType.LET;

    }

    @Override

    public <R,D> R accept(final TreeVisitor<R,D> visitor, final D data) {

        return visitor.visitVariable(this, data);

    }

}