/*

 * 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.tools.tree;

import sun.tools.java.*;

import java.io.PrintStream;

import java.io.ByteArrayOutputStream;

/**

 * 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 Node implements Constants, Cloneable {

    int op;

    long where;

    /**

     * Constructor

     */

    Node(int op, long where) {

        this.op = op;

        this.where = where;

    }

    /**

     * Get the operator

     */

    public int getOp() {

        return op;

    }

    /**

     * Get where

     */

    public long getWhere() {

        return where;

    }

    /**

     * Implicit conversions

     */

    public Expression convert(Environment env, Context ctx, Type t, Expression e) {

        if (e.type.isType(TC_ERROR) || t.isType(TC_ERROR)) {

            // An error was already reported

            return e;

        }

        if (e.type.equals(t)) {

            // The types are already the same

            return e;

        }

        try {

            if (e.fitsType(env, ctx, t)) {

                return new ConvertExpression(where, t, e);

            }

            if (env.explicitCast(e.type, t)) {

                env.error(where, "explicit.cast.needed", opNames[op], e.type, t);

                return new ConvertExpression(where, t, e);

            }

        } catch (ClassNotFound ee) {

            env.error(where, "class.not.found", ee.name, opNames[op]);

        }

        // The cast is not allowed

        env.error(where, "incompatible.type", opNames[op], e.type, t);

        return new ConvertExpression(where, Type.tError, e);

    }

    /**

     * Print

     */

    public void print(PrintStream out) {

        throw new CompilerError("print");

    }

    /**

     * Clone this object.

     */

    public Object clone() {

        try {

            return super.clone();

        } catch (CloneNotSupportedException e) {

            // this shouldn't happen, since we are Cloneable

        }

    }

    /*

     * Useful for simple debugging

     */

    public String toString() {

        ByteArrayOutputStream bos = new ByteArrayOutputStream();

        print(new PrintStream(bos));

        return bos.toString();

    }

}