/*
 * Copyright (c) 2003, 2015, 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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 * questions.
 */

package com.sun.tools.javac.jvm;

import com.sun.tools.javac.code.*;
import com.sun.tools.javac.util.List;

import static com.sun.tools.javac.code.TypeTag.UNINITIALIZED_OBJECT;
import static com.sun.tools.javac.code.TypeTag.UNINITIALIZED_THIS;

These pseudo-types appear in the generated verifier tables to
 indicate objects that have been allocated but not yet constructed.
 
This is NOT part of any supported API.
 If you write code that depends on this, you do so at your own risk.
 This code and its internal interfaces are subject to change or
 deletion without notice.
/** These pseudo-types appear in the generated verifier tables to
 *  indicate objects that have been allocated but not yet constructed.
 *
 *  <p><b>This is NOT part of any supported API.
 *  If you write code that depends on this, you do so at your own risk.
 *  This code and its internal interfaces are subject to change or
 *  deletion without notice.</b>
 */
class UninitializedType extends Type.DelegatedType {

    public static UninitializedType uninitializedThis(Type qtype) {
        return new UninitializedType(UNINITIALIZED_THIS, qtype, -1,
                                     qtype.getMetadata());
    }

    public static UninitializedType uninitializedObject(Type qtype, int offset) {
        return new UninitializedType(UNINITIALIZED_OBJECT, qtype, offset,
                                     qtype.getMetadata());
    }

    public final int offset; // PC where allocation took place
    private UninitializedType(TypeTag tag, Type qtype, int offset,
                              TypeMetadata metadata) {
        super(tag, qtype, metadata);
        this.offset = offset;
    }

    @Override
    public UninitializedType cloneWithMetadata(final TypeMetadata md) {
        return new UninitializedType(tag, qtype, offset, md);
    }

    Type initializedType() {
        return qtype;
    }
}