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src/share/classes/com/sun/tools/javac/comp/AttrContext.java@859dc787b52b (annotated)

src/share/classes/com/sun/tools/javac/comp/AttrContext.java

Thu, 24 May 2018 16:48:51 +0800

author

aoqi

date

Thu, 24 May 2018 16:48:51 +0800

changeset 3295

859dc787b52b

parent 3005

0353cf89ea96

parent 2525

2eb010b6cb22

permissions

-rw-r--r--

Merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation. Oracle designates this
aoqi@0	8	* particular file as subject to the "Classpath" exception as provided
aoqi@0	9	* by Oracle in the LICENSE file that accompanied this code.
aoqi@0	10	*
aoqi@0	11	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	14	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	15	* accompanied this code).
aoqi@0	16	*
aoqi@0	17	* You should have received a copy of the GNU General Public License version
aoqi@0	18	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	19	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	20	*
aoqi@0	21	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	22	* or visit www.oracle.com if you need additional information or have any
aoqi@0	23	* questions.
aoqi@0	24	*/
aoqi@0	25
aoqi@0	26	package com.sun.tools.javac.comp;
aoqi@0	27
sadayapalam@3005	28	import com.sun.tools.javac.tree.JCTree;
aoqi@0	29	import com.sun.tools.javac.util.*;
aoqi@0	30	import com.sun.tools.javac.code.*;
aoqi@0	31
aoqi@0	32	/** Contains information specific to the attribute and enter
aoqi@0	33	* passes, to be used in place of the generic field in environments.
aoqi@0	34	*
aoqi@0	35	* <p><b>This is NOT part of any supported API.
aoqi@0	36	* If you write code that depends on this, you do so at your own risk.
aoqi@0	37	* This code and its internal interfaces are subject to change or
aoqi@0	38	* deletion without notice.</b>
aoqi@0	39	*/
aoqi@0	40	public class AttrContext {
aoqi@0	41
aoqi@0	42	/** The scope of local symbols.
aoqi@0	43	*/
aoqi@0	44	Scope scope = null;
aoqi@0	45
aoqi@0	46	/** The number of enclosing `static' modifiers.
aoqi@0	47	*/
aoqi@0	48	int staticLevel = 0;
aoqi@0	49
aoqi@0	50	/** Is this an environment for a this(...) or super(...) call?
aoqi@0	51	*/
aoqi@0	52	boolean isSelfCall = false;
aoqi@0	53
aoqi@0	54	/** Are we evaluating the selector of a `super' or type name?
aoqi@0	55	*/
aoqi@0	56	boolean selectSuper = false;
aoqi@0	57
aoqi@0	58	/** Is the current target of lambda expression or method reference serializable?
aoqi@0	59	*/
aoqi@0	60	boolean isSerializable = false;
aoqi@0	61
aoqi@0	62	/** Are arguments to current function applications boxed into an array for varargs?
aoqi@0	63	*/
aoqi@0	64	Resolve.MethodResolutionPhase pendingResolutionPhase = null;
aoqi@0	65
aoqi@0	66	/** A record of the lint/SuppressWarnings currently in effect
aoqi@0	67	*/
aoqi@0	68	Lint lint;
aoqi@0	69
aoqi@0	70	/** The variable whose initializer is being attributed
aoqi@0	71	* useful for detecting self-references in variable initializers
aoqi@0	72	*/
aoqi@0	73	Symbol enclVar = null;
aoqi@0	74
aoqi@0	75	/** ResultInfo to be used for attributing 'return' statement expressions
aoqi@0	76	* (set by Attr.visitMethod and Attr.visitLambda)
aoqi@0	77	*/
aoqi@0	78	Attr.ResultInfo returnResult = null;
aoqi@0	79
aoqi@0	80	/** Symbol corresponding to the site of a qualified default super call
aoqi@0	81	*/
aoqi@0	82	Type defaultSuperCallSite = null;
aoqi@0	83
sadayapalam@3005	84	/** Tree that when non null, is to be preferentially used in diagnostics.
sadayapalam@3005	85	* Usually Env<AttrContext>.tree is the tree to be referred to in messages,
sadayapalam@3005	86	* but this may not be true during the window a method is looked up in enclosing
sadayapalam@3005	87	* contexts (JDK-8145466)
sadayapalam@3005	88	*/
sadayapalam@3005	89	JCTree preferredTreeForDiagnostics;
sadayapalam@3005	90
aoqi@0	91	/** Duplicate this context, replacing scope field and copying all others.
aoqi@0	92	*/
aoqi@0	93	AttrContext dup(Scope scope) {
aoqi@0	94	AttrContext info = new AttrContext();
aoqi@0	95	info.scope = scope;
aoqi@0	96	info.staticLevel = staticLevel;
aoqi@0	97	info.isSelfCall = isSelfCall;
aoqi@0	98	info.selectSuper = selectSuper;
aoqi@0	99	info.pendingResolutionPhase = pendingResolutionPhase;
aoqi@0	100	info.lint = lint;
aoqi@0	101	info.enclVar = enclVar;
aoqi@0	102	info.returnResult = returnResult;
aoqi@0	103	info.defaultSuperCallSite = defaultSuperCallSite;
aoqi@0	104	info.isSerializable = isSerializable;
sadayapalam@3005	105	info.preferredTreeForDiagnostics = preferredTreeForDiagnostics;
aoqi@0	106	return info;
aoqi@0	107	}
aoqi@0	108
aoqi@0	109	/** Duplicate this context, copying all fields.
aoqi@0	110	*/
aoqi@0	111	AttrContext dup() {
aoqi@0	112	return dup(scope);
aoqi@0	113	}
aoqi@0	114
aoqi@0	115	public Iterable<Symbol> getLocalElements() {
aoqi@0	116	if (scope == null)
aoqi@0	117	return List.nil();
aoqi@0	118	return scope.getElements();
aoqi@0	119	}
aoqi@0	120
aoqi@0	121	boolean lastResolveVarargs() {
aoqi@0	122	return pendingResolutionPhase != null &&
aoqi@0	123	pendingResolutionPhase.isVarargsRequired();
aoqi@0	124	}
aoqi@0	125
aoqi@0	126	@Override
aoqi@0	127	public String toString() {
aoqi@0	128	return "AttrContext[" + scope.toString() + "]";
aoqi@0	129	}
aoqi@0	130	}