1 /*

     2  * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.

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

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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

    23  * questions.

    24  */

    25 

    26 package com.sun.tools.javac.code;

    27 

    28 

    29 /** An interface for type tag values, which distinguish between different

    30  *  sorts of types.

    31  *

    32  *  <p><b>This is NOT part of any supported API.

    33  *  If you write code that depends on this, you do so at your own risk.

    34  *  This code and its internal interfaces are subject to change or

    35  *  deletion without notice.</b>

    36  */

    37 public class TypeTags {

    38 

    39     private TypeTags() {} // uninstantiable

    40 

    41     /** The tag of the basic type `byte'.

    42      */

    43     public static final int BYTE = 1;

    44 

    45     /** The tag of the basic type `char'.

    46      */

    47     public static final int CHAR = BYTE+1;

    48 

    49     /** The tag of the basic type `short'.

    50      */

    51     public static final int SHORT = CHAR+1;

    52 

    53     /** The tag of the basic type `int'.

    54      */

    55     public static final int INT = SHORT+1;

    56 

    57     /** The tag of the basic type `long'.

    58      */

    59     public static final int LONG = INT+1;

    60 

    61     /** The tag of the basic type `float'.

    62      */

    63     public static final int FLOAT = LONG+1;

    64 

    65     /** The tag of the basic type `double'.

    66      */

    67     public static final int DOUBLE = FLOAT+1;

    68 

    69     /** The tag of the basic type `boolean'.

    70      */

    71     public static final int BOOLEAN = DOUBLE+1;

    72 

    73     /** The tag of the type `void'.

    74      */

    75     public static final int VOID = BOOLEAN+1;

    76 

    77     /** The tag of all class and interface types.

    78      */

    79     public static final int CLASS = VOID+1;

    80 

    81     /** The tag of all array types.

    82      */

    83     public static final int ARRAY = CLASS+1;

    84 

    85     /** The tag of all (monomorphic) method types.

    86      */

    87     public static final int METHOD = ARRAY+1;

    88 

    89     /** The tag of all package "types".

    90      */

    91     public static final int PACKAGE = METHOD+1;

    92 

    93     /** The tag of all (source-level) type variables.

    94      */

    95     public static final int TYPEVAR = PACKAGE+1;

    96 

    97     /** The tag of all type arguments.

    98      */

    99     public static final int WILDCARD = TYPEVAR+1;

   100 

   101     /** The tag of all polymorphic (method-) types.

   102      */

   103     public static final int FORALL = WILDCARD+1;

   104 

   105     /** The tag of deferred expression types in method context

   106      */

   107     public static final int DEFERRED = FORALL+1;

   108 

   109     /** The tag of the bottom type {@code <null>}.

   110      */

   111     public static final int BOT = DEFERRED+1;

   112 

   113     /** The tag of a missing type.

   114      */

   115     public static final int NONE = BOT+1;

   116 

   117     /** The tag of the error type.

   118      */

   119     public static final int ERROR = NONE+1;

   120 

   121     /** The tag of an unknown type

   122      */

   123     public static final int UNKNOWN = ERROR+1;

   124 

   125     /** The tag of all instantiatable type variables.

   126      */

   127     public static final int UNDETVAR = UNKNOWN+1;

   128 

   129     /** The number of type tags.

   130      */

   131     public static final int TypeTagCount = UNDETVAR+1;

   132 

   133     /** The maximum tag of a basic type.

   134      */

   135     public static final int lastBaseTag = BOOLEAN;

   136 

   137     /** The minimum tag of a partial type

   138      */

   139     public static final int firstPartialTag = ERROR;

   140 }