Thu, 12 Jan 2012 15:28:34 +0000
7123100: javac fails with java.lang.StackOverflowError
Summary: Inference of under-constrained type-variables creates erroneous recursive wildcard types
Reviewed-by: jjg
duke@1 | 1 | /* |
ohair@554 | 2 | * Copyright (c) 1999, 2005, Oracle and/or its affiliates. All rights reserved. |
duke@1 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@1 | 4 | * |
duke@1 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@1 | 6 | * under the terms of the GNU General Public License version 2 only, as |
ohair@554 | 7 | * published by the Free Software Foundation. Oracle designates this |
duke@1 | 8 | * particular file as subject to the "Classpath" exception as provided |
ohair@554 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
duke@1 | 10 | * |
duke@1 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@1 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@1 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@1 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@1 | 15 | * accompanied this code). |
duke@1 | 16 | * |
duke@1 | 17 | * You should have received a copy of the GNU General Public License version |
duke@1 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@1 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@1 | 20 | * |
ohair@554 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
ohair@554 | 22 | * or visit www.oracle.com if you need additional information or have any |
ohair@554 | 23 | * questions. |
duke@1 | 24 | */ |
duke@1 | 25 | |
duke@1 | 26 | package com.sun.tools.javac.code; |
duke@1 | 27 | |
duke@1 | 28 | |
duke@1 | 29 | /** An interface for type tag values, which distinguish between different |
duke@1 | 30 | * sorts of types. |
duke@1 | 31 | * |
jjg@581 | 32 | * <p><b>This is NOT part of any supported API. |
jjg@581 | 33 | * If you write code that depends on this, you do so at your own risk. |
duke@1 | 34 | * This code and its internal interfaces are subject to change or |
duke@1 | 35 | * deletion without notice.</b> |
duke@1 | 36 | */ |
duke@1 | 37 | public class TypeTags { |
duke@1 | 38 | |
duke@1 | 39 | private TypeTags() {} // uninstantiable |
duke@1 | 40 | |
duke@1 | 41 | /** The tag of the basic type `byte'. |
duke@1 | 42 | */ |
duke@1 | 43 | public static final int BYTE = 1; |
duke@1 | 44 | |
duke@1 | 45 | /** The tag of the basic type `char'. |
duke@1 | 46 | */ |
duke@1 | 47 | public static final int CHAR = BYTE+1; |
duke@1 | 48 | |
duke@1 | 49 | /** The tag of the basic type `short'. |
duke@1 | 50 | */ |
duke@1 | 51 | public static final int SHORT = CHAR+1; |
duke@1 | 52 | |
duke@1 | 53 | /** The tag of the basic type `int'. |
duke@1 | 54 | */ |
duke@1 | 55 | public static final int INT = SHORT+1; |
duke@1 | 56 | |
duke@1 | 57 | /** The tag of the basic type `long'. |
duke@1 | 58 | */ |
duke@1 | 59 | public static final int LONG = INT+1; |
duke@1 | 60 | |
duke@1 | 61 | /** The tag of the basic type `float'. |
duke@1 | 62 | */ |
duke@1 | 63 | public static final int FLOAT = LONG+1; |
duke@1 | 64 | |
duke@1 | 65 | /** The tag of the basic type `double'. |
duke@1 | 66 | */ |
duke@1 | 67 | public static final int DOUBLE = FLOAT+1; |
duke@1 | 68 | |
duke@1 | 69 | /** The tag of the basic type `boolean'. |
duke@1 | 70 | */ |
duke@1 | 71 | public static final int BOOLEAN = DOUBLE+1; |
duke@1 | 72 | |
duke@1 | 73 | /** The tag of the type `void'. |
duke@1 | 74 | */ |
duke@1 | 75 | public static final int VOID = BOOLEAN+1; |
duke@1 | 76 | |
duke@1 | 77 | /** The tag of all class and interface types. |
duke@1 | 78 | */ |
duke@1 | 79 | public static final int CLASS = VOID+1; |
duke@1 | 80 | |
duke@1 | 81 | /** The tag of all array types. |
duke@1 | 82 | */ |
duke@1 | 83 | public static final int ARRAY = CLASS+1; |
duke@1 | 84 | |
duke@1 | 85 | /** The tag of all (monomorphic) method types. |
duke@1 | 86 | */ |
duke@1 | 87 | public static final int METHOD = ARRAY+1; |
duke@1 | 88 | |
duke@1 | 89 | /** The tag of all package "types". |
duke@1 | 90 | */ |
duke@1 | 91 | public static final int PACKAGE = METHOD+1; |
duke@1 | 92 | |
duke@1 | 93 | /** The tag of all (source-level) type variables. |
duke@1 | 94 | */ |
duke@1 | 95 | public static final int TYPEVAR = PACKAGE+1; |
duke@1 | 96 | |
duke@1 | 97 | /** The tag of all type arguments. |
duke@1 | 98 | */ |
duke@1 | 99 | public static final int WILDCARD = TYPEVAR+1; |
duke@1 | 100 | |
duke@1 | 101 | /** The tag of all polymorphic (method-) types. |
duke@1 | 102 | */ |
duke@1 | 103 | public static final int FORALL = WILDCARD+1; |
duke@1 | 104 | |
duke@1 | 105 | /** The tag of the bottom type <null>. |
duke@1 | 106 | */ |
duke@1 | 107 | public static final int BOT = FORALL+1; |
duke@1 | 108 | |
duke@1 | 109 | /** The tag of a missing type. |
duke@1 | 110 | */ |
duke@1 | 111 | public static final int NONE = BOT+1; |
duke@1 | 112 | |
duke@1 | 113 | /** The tag of the error type. |
duke@1 | 114 | */ |
duke@1 | 115 | public static final int ERROR = NONE+1; |
duke@1 | 116 | |
duke@1 | 117 | /** The tag of an unknown type |
duke@1 | 118 | */ |
duke@1 | 119 | public static final int UNKNOWN = ERROR+1; |
duke@1 | 120 | |
duke@1 | 121 | /** The tag of all instantiatable type variables. |
duke@1 | 122 | */ |
duke@1 | 123 | public static final int UNDETVAR = UNKNOWN+1; |
duke@1 | 124 | |
duke@1 | 125 | /** The number of type tags. |
duke@1 | 126 | */ |
duke@1 | 127 | public static final int TypeTagCount = UNDETVAR+1; |
duke@1 | 128 | |
duke@1 | 129 | /** The maximum tag of a basic type. |
duke@1 | 130 | */ |
duke@1 | 131 | public static final int lastBaseTag = BOOLEAN; |
duke@1 | 132 | |
duke@1 | 133 | /** The minimum tag of a partial type |
duke@1 | 134 | */ |
duke@1 | 135 | public static final int firstPartialTag = ERROR; |
duke@1 | 136 | } |