Sat, 07 Nov 2020 10:30:02 +0800
Added tag mips-jdk8u275-b01 for changeset eb6ee6a5f2fe
1 /*
2 * Copyright (c) 1999, 2014, 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 */
26 package com.sun.tools.javac.comp;
28 import com.sun.tools.javac.tree.JCTree;
29 import com.sun.tools.javac.util.*;
30 import com.sun.tools.javac.code.*;
32 /** Contains information specific to the attribute and enter
33 * passes, to be used in place of the generic field in environments.
34 *
35 * <p><b>This is NOT part of any supported API.
36 * If you write code that depends on this, you do so at your own risk.
37 * This code and its internal interfaces are subject to change or
38 * deletion without notice.</b>
39 */
40 public class AttrContext {
42 /** The scope of local symbols.
43 */
44 Scope scope = null;
46 /** The number of enclosing `static' modifiers.
47 */
48 int staticLevel = 0;
50 /** Is this an environment for a this(...) or super(...) call?
51 */
52 boolean isSelfCall = false;
54 /** Are we evaluating the selector of a `super' or type name?
55 */
56 boolean selectSuper = false;
58 /** Is the current target of lambda expression or method reference serializable?
59 */
60 boolean isSerializable = false;
62 /** Are arguments to current function applications boxed into an array for varargs?
63 */
64 Resolve.MethodResolutionPhase pendingResolutionPhase = null;
66 /** A record of the lint/SuppressWarnings currently in effect
67 */
68 Lint lint;
70 /** The variable whose initializer is being attributed
71 * useful for detecting self-references in variable initializers
72 */
73 Symbol enclVar = null;
75 /** ResultInfo to be used for attributing 'return' statement expressions
76 * (set by Attr.visitMethod and Attr.visitLambda)
77 */
78 Attr.ResultInfo returnResult = null;
80 /** Symbol corresponding to the site of a qualified default super call
81 */
82 Type defaultSuperCallSite = null;
84 /** Tree that when non null, is to be preferentially used in diagnostics.
85 * Usually Env<AttrContext>.tree is the tree to be referred to in messages,
86 * but this may not be true during the window a method is looked up in enclosing
87 * contexts (JDK-8145466)
88 */
89 JCTree preferredTreeForDiagnostics;
91 /** Duplicate this context, replacing scope field and copying all others.
92 */
93 AttrContext dup(Scope scope) {
94 AttrContext info = new AttrContext();
95 info.scope = scope;
96 info.staticLevel = staticLevel;
97 info.isSelfCall = isSelfCall;
98 info.selectSuper = selectSuper;
99 info.pendingResolutionPhase = pendingResolutionPhase;
100 info.lint = lint;
101 info.enclVar = enclVar;
102 info.returnResult = returnResult;
103 info.defaultSuperCallSite = defaultSuperCallSite;
104 info.isSerializable = isSerializable;
105 info.preferredTreeForDiagnostics = preferredTreeForDiagnostics;
106 return info;
107 }
109 /** Duplicate this context, copying all fields.
110 */
111 AttrContext dup() {
112 return dup(scope);
113 }
115 public Iterable<Symbol> getLocalElements() {
116 if (scope == null)
117 return List.nil();
118 return scope.getElements();
119 }
121 boolean lastResolveVarargs() {
122 return pendingResolutionPhase != null &&
123 pendingResolutionPhase.isVarargsRequired();
124 }
126 @Override
127 public String toString() {
128 return "AttrContext[" + scope.toString() + "]";
129 }
130 }