/*

 * Copyright (c) 1994, 2003, 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

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 */

package sun.tools.tree;

import sun.tools.java.*;

import sun.tools.asm.Assembler;

import java.io.PrintStream;

import java.util.Hashtable;

/**

 * WARNING: The contents of this source file are not part of any

 * supported API.  Code that depends on them does so at its own risk:

 * they are subject to change or removal without notice.

 */

public

class SuperExpression extends ThisExpression {

    /**

     * Constructor

     */

    public SuperExpression(long where) {

        super(SUPER, where);

    }

    /**

     * Constructor for "outer.super()"

     */

    public SuperExpression(long where, Expression outerArg) {

        super(where, outerArg);

        op = SUPER;

    }

    public SuperExpression(long where, Context ctx) {

        super(where, ctx);

        op = SUPER;

    }

    /**

     * Check expression

     */

    public Vset checkValue(Environment env, Context ctx, Vset vset, Hashtable exp) {

        vset = checkCommon(env, ctx, vset, exp);

        if (type != Type.tError) {

            // "super" is not allowed in this context:

            env.error(where, "undef.var.super", idSuper);

        }

        return vset;

    }

    /**

     * Check if the present name is part of a scoping prefix.

     */

    public Vset checkAmbigName(Environment env, Context ctx,

                               Vset vset, Hashtable exp,

                               UnaryExpression loc) {

        return checkCommon(env, ctx, vset, exp);

    }

    /** Common code for checkValue and checkAmbigName */

    private Vset checkCommon(Environment env, Context ctx, Vset vset, Hashtable exp) {

        ClassDeclaration superClass = ctx.field.getClassDefinition().getSuperClass();

        if (superClass == null) {

            env.error(where, "undef.var", idSuper);

            type = Type.tError;

            return vset;

        }

        vset = super.checkValue(env, ctx, vset, exp);

        type = superClass.getType();

        return vset;

    }

}