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    1   /*
    2    * Copyright (c) 1999, 2005, 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 the bottom type <null>.
  106        */
  107       public static final int BOT = FORALL+1;
  108   
  109       /** The tag of a missing type.
  110        */
  111       public static final int NONE = BOT+1;
  112   
  113       /** The tag of the error type.
  114        */
  115       public static final int ERROR = NONE+1;
  116   
  117       /** The tag of an unknown type
  118        */
  119       public static final int UNKNOWN = ERROR+1;
  120   
  121       /** The tag of all instantiatable type variables.
  122        */
  123       public static final int UNDETVAR = UNKNOWN+1;
  124   
  125       /** The number of type tags.
  126        */
  127       public static final int TypeTagCount = UNDETVAR+1;
  128   
  129       /** The maximum tag of a basic type.
  130        */
  131       public static final int lastBaseTag = BOOLEAN;
  132   
  133       /** The minimum tag of a partial type
  134        */
  135       public static final int firstPartialTag = ERROR;
  136   }

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