001 /*
002 * Copyright 1999-2008 Sun Microsystems, Inc. All Rights Reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation. Sun designates this
008 * particular file as subject to the "Classpath" exception as provided
009 * by Sun in the LICENSE file that accompanied this code.
010 *
011 * This code is distributed in the hope that it will be useful, but WITHOUT
012 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
014 * version 2 for more details (a copy is included in the LICENSE file that
015 * accompanied this code).
016 *
017 * You should have received a copy of the GNU General Public License version
018 * 2 along with this work; if not, write to the Free Software Foundation,
019 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020 *
021 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022 * CA 95054 USA or visit www.sun.com if you need additional information or
023 * have any questions.
024 */
025
026 package com.sun.tools.javac.comp;
027
028 import com.sun.tools.javac.util.*;
029 import com.sun.tools.javac.code.*;
030
031 /** Contains information specific to the attribute and enter
032 * passes, to be used in place of the generic field in environments.
033 *
034 * <p><b>This is NOT part of any API supported by Sun Microsystems. If
035 * you write code that depends on this, you do so at your own risk.
036 * This code and its internal interfaces are subject to change or
037 * deletion without notice.</b>
038 */
039 public class AttrContext {
040
041 /** The scope of local symbols.
042 */
043 Scope scope = null;
044
045 /** The number of enclosing `static' modifiers.
046 */
047 int staticLevel = 0;
048
049 /** Is this an environment for a this(...) or super(...) call?
050 */
051 boolean isSelfCall = false;
052
053 /** Are we evaluating the selector of a `super' or type name?
054 */
055 boolean selectSuper = false;
056
057 /** Are arguments to current function applications boxed into an array for varargs?
058 */
059 boolean varArgs = false;
060
061 /** A list of type variables that are all-quantifed in current context.
062 */
063 List<Type> tvars = List.nil();
064
065 /** A record of the lint/SuppressWarnings currently in effect
066 */
067 Lint lint;
068
069 /** The variable whose initializer is being attributed
070 * useful for detecting self-references in variable initializers
071 */
072 Symbol enclVar = null;
073
074 /** Duplicate this context, replacing scope field and copying all others.
075 */
076 AttrContext dup(Scope scope) {
077 AttrContext info = new AttrContext();
078 info.scope = scope;
079 info.staticLevel = staticLevel;
080 info.isSelfCall = isSelfCall;
081 info.selectSuper = selectSuper;
082 info.varArgs = varArgs;
083 info.tvars = tvars;
084 info.lint = lint;
085 info.enclVar = enclVar;
086 return info;
087 }
088
089 /** Duplicate this context, copying all fields.
090 */
091 AttrContext dup() {
092 return dup(scope);
093 }
094
095 public Iterable<Symbol> getLocalElements() {
096 if (scope == null)
097 return List.nil();
098 return scope.getElements();
099 }
100
101 public String toString() {
102 return "AttrContext[" + scope.toString() + "]";
103 }
104 }