author | mcimadamore |
Fri, 05 Oct 2012 14:35:24 +0100 | |
changeset 14058 | c7ec7facdd20 |
parent 14057 | b4b0377b8dba |
child 14258 | 8d2148961366 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package com.sun.tools.javac.comp; |
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|
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import com.sun.tools.javac.code.*; |
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import com.sun.tools.javac.tree.*; |
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import com.sun.tools.javac.util.*; |
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import com.sun.tools.javac.code.Symbol.*; |
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import com.sun.tools.javac.code.Type.*; |
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import com.sun.tools.javac.comp.Attr.ResultInfo; |
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import com.sun.tools.javac.comp.Infer.InferenceContext; |
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import com.sun.tools.javac.comp.Resolve.MethodResolutionPhase; |
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import com.sun.tools.javac.tree.JCTree.*; |
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|
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import javax.tools.JavaFileObject; |
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|
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import java.util.ArrayList; |
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import java.util.HashSet; |
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import java.util.Map; |
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import java.util.Queue; |
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import java.util.Set; |
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import java.util.WeakHashMap; |
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import static com.sun.tools.javac.code.TypeTags.*; |
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import static com.sun.tools.javac.tree.JCTree.Tag.*; |
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import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; |
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/** |
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* This is an helper class that is used to perform deferred type-analysis. |
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* Each time a poly expression occurs in argument position, javac attributes it |
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* with a temporary 'deferred type' that is checked (possibly multiple times) |
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* against an expected formal type. |
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* |
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* <p><b>This is NOT part of any supported API. |
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* If you write code that depends on this, you do so at your own risk. |
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* This code and its internal interfaces are subject to change or |
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* deletion without notice.</b> |
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*/ |
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public class DeferredAttr extends JCTree.Visitor { |
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protected static final Context.Key<DeferredAttr> deferredAttrKey = |
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new Context.Key<DeferredAttr>(); |
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final Attr attr; |
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final Check chk; |
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final Enter enter; |
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final Infer infer; |
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final Log log; |
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final Symtab syms; |
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final TreeMaker make; |
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final Types types; |
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public static DeferredAttr instance(Context context) { |
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DeferredAttr instance = context.get(deferredAttrKey); |
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if (instance == null) |
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instance = new DeferredAttr(context); |
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return instance; |
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} |
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protected DeferredAttr(Context context) { |
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context.put(deferredAttrKey, this); |
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attr = Attr.instance(context); |
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chk = Check.instance(context); |
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enter = Enter.instance(context); |
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infer = Infer.instance(context); |
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log = Log.instance(context); |
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syms = Symtab.instance(context); |
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make = TreeMaker.instance(context); |
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types = Types.instance(context); |
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} |
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/** |
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* This type represents a deferred type. A deferred type starts off with |
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* no information on the underlying expression type. Such info needs to be |
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* discovered through type-checking the deferred type against a target-type. |
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* Every deferred type keeps a pointer to the AST node from which it originated. |
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*/ |
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public class DeferredType extends Type { |
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public JCExpression tree; |
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Env<AttrContext> env; |
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AttrMode mode; |
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SpeculativeCache speculativeCache; |
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DeferredType(JCExpression tree, Env<AttrContext> env) { |
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super(DEFERRED, null); |
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this.tree = tree; |
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this.env = env.dup(tree, env.info.dup()); |
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this.speculativeCache = new SpeculativeCache(); |
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} |
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/** |
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* A speculative cache is used to keep track of all overload resolution rounds |
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* that triggered speculative attribution on a given deferred type. Each entry |
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* stores a pointer to the speculative tree and the resolution phase in which the entry |
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* has been added. |
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*/ |
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class SpeculativeCache { |
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private Map<Symbol, List<Entry>> cache = |
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new WeakHashMap<Symbol, List<Entry>>(); |
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class Entry { |
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JCTree speculativeTree; |
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Resolve.MethodResolutionPhase phase; |
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public Entry(JCTree speculativeTree, MethodResolutionPhase phase) { |
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this.speculativeTree = speculativeTree; |
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this.phase = phase; |
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} |
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133 |
|
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boolean matches(Resolve.MethodResolutionPhase phase) { |
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return this.phase == phase; |
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136 |
} |
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137 |
} |
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138 |
|
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139 |
/** |
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140 |
* Clone a speculative cache entry as a fresh entry associated |
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141 |
* with a new method (this maybe required to fixup speculative cache |
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* misses after Resolve.access()) |
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143 |
*/ |
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144 |
void dupAllTo(Symbol from, Symbol to) { |
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Assert.check(cache.get(to) == null); |
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List<Entry> entries = cache.get(from); |
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if (entries != null) { |
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148 |
cache.put(to, entries); |
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149 |
} |
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150 |
} |
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151 |
|
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152 |
/** |
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|
153 |
* Retrieve a speculative cache entry corresponding to given symbol |
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154 |
* and resolution phase |
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155 |
*/ |
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156 |
Entry get(Symbol msym, MethodResolutionPhase phase) { |
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List<Entry> entries = cache.get(msym); |
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158 |
if (entries == null) return null; |
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|
159 |
for (Entry e : entries) { |
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160 |
if (e.matches(phase)) return e; |
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161 |
} |
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162 |
return null; |
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|
163 |
} |
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|
164 |
|
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165 |
/** |
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|
166 |
* Stores a speculative cache entry corresponding to given symbol |
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|
167 |
* and resolution phase |
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|
168 |
*/ |
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169 |
void put(Symbol msym, JCTree speculativeTree, MethodResolutionPhase phase) { |
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170 |
List<Entry> entries = cache.get(msym); |
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|
171 |
if (entries == null) { |
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|
172 |
entries = List.nil(); |
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173 |
} |
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174 |
cache.put(msym, entries.prepend(new Entry(speculativeTree, phase))); |
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|
175 |
} |
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|
176 |
} |
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|
177 |
|
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|
178 |
/** |
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|
179 |
* Get the type that has been computed during a speculative attribution round |
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|
180 |
*/ |
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|
181 |
Type speculativeType(Symbol msym, MethodResolutionPhase phase) { |
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|
182 |
SpeculativeCache.Entry e = speculativeCache.get(msym, phase); |
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183 |
return e != null ? e.speculativeTree.type : Type.noType; |
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|
184 |
} |
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|
185 |
|
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|
186 |
/** |
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|
187 |
* Check a deferred type against a potential target-type. Depending on |
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|
188 |
* the current attribution mode, a normal vs. speculative attribution |
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|
189 |
* round is performed on the underlying AST node. There can be only one |
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|
190 |
* speculative round for a given target method symbol; moreover, a normal |
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|
191 |
* attribution round must follow one or more speculative rounds. |
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|
192 |
*/ |
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|
193 |
Type check(ResultInfo resultInfo) { |
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|
194 |
DeferredAttrContext deferredAttrContext = |
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|
195 |
resultInfo.checkContext.deferredAttrContext(); |
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|
196 |
Assert.check(deferredAttrContext != emptyDeferredAttrContext); |
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|
197 |
List<Type> stuckVars = stuckVars(tree, resultInfo); |
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|
198 |
if (stuckVars.nonEmpty()) { |
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|
199 |
deferredAttrContext.addDeferredAttrNode(this, resultInfo, stuckVars); |
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|
200 |
return Type.noType; |
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|
201 |
} else { |
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|
202 |
try { |
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mcimadamore
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|
203 |
switch (deferredAttrContext.mode) { |
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mcimadamore
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|
204 |
case SPECULATIVE: |
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|
205 |
Assert.check(mode == null || |
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|
206 |
(mode == AttrMode.SPECULATIVE && |
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|
207 |
speculativeType(deferredAttrContext.msym, deferredAttrContext.phase).tag == NONE)); |
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|
208 |
JCTree speculativeTree = attribSpeculative(tree, env, resultInfo); |
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|
209 |
speculativeCache.put(deferredAttrContext.msym, speculativeTree, deferredAttrContext.phase); |
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|
210 |
return speculativeTree.type; |
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mcimadamore
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|
211 |
case CHECK: |
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|
212 |
Assert.check(mode == AttrMode.SPECULATIVE); |
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|
213 |
return attr.attribTree(tree, env, resultInfo); |
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|
214 |
} |
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mcimadamore
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|
215 |
Assert.error(); |
b4b0377b8dba
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mcimadamore
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|
216 |
return null; |
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mcimadamore
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changeset
|
217 |
} finally { |
b4b0377b8dba
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mcimadamore
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|
218 |
mode = deferredAttrContext.mode; |
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mcimadamore
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diff
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|
219 |
} |
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mcimadamore
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|
220 |
} |
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mcimadamore
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diff
changeset
|
221 |
} |
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mcimadamore
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changeset
|
222 |
} |
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mcimadamore
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changeset
|
223 |
|
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mcimadamore
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changeset
|
224 |
/** |
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mcimadamore
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|
225 |
* The 'mode' in which the deferred type is to be type-checked |
b4b0377b8dba
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mcimadamore
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|
226 |
*/ |
b4b0377b8dba
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mcimadamore
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|
227 |
public enum AttrMode { |
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mcimadamore
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|
228 |
/** |
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|
229 |
* A speculative type-checking round is used during overload resolution |
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|
230 |
* mainly to generate constraints on inference variables. Side-effects |
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|
231 |
* arising from type-checking the expression associated with the deferred |
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changeset
|
232 |
* type are reversed after the speculative round finishes. This means the |
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mcimadamore
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|
233 |
* expression tree will be left in a blank state. |
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mcimadamore
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diff
changeset
|
234 |
*/ |
b4b0377b8dba
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mcimadamore
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|
235 |
SPECULATIVE, |
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mcimadamore
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diff
changeset
|
236 |
/** |
b4b0377b8dba
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mcimadamore
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|
237 |
* This is the plain type-checking mode. Produces side-effects on the underlying AST node |
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mcimadamore
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|
238 |
*/ |
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mcimadamore
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|
239 |
CHECK; |
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mcimadamore
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|
240 |
} |
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mcimadamore
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changeset
|
241 |
|
b4b0377b8dba
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|
242 |
/** |
b4b0377b8dba
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mcimadamore
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|
243 |
* Routine that performs speculative type-checking; the input AST node is |
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|
244 |
* cloned (to avoid side-effects cause by Attr) and compiler state is |
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changeset
|
245 |
* restored after type-checking. All diagnostics (but critical ones) are |
b4b0377b8dba
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mcimadamore
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changeset
|
246 |
* disabled during speculative type-checking. |
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mcimadamore
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changeset
|
247 |
*/ |
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|
248 |
JCTree attribSpeculative(JCTree tree, Env<AttrContext> env, ResultInfo resultInfo) { |
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|
249 |
JCTree newTree = new TreeCopier<Object>(make).copy(tree); |
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|
250 |
Env<AttrContext> speculativeEnv = env.dup(newTree, env.info.dup(env.info.scope.dupUnshared())); |
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mcimadamore
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|
251 |
speculativeEnv.info.scope.owner = env.info.scope.owner; |
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|
252 |
Filter<JCDiagnostic> prevDeferDiagsFilter = log.deferredDiagFilter; |
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|
253 |
Queue<JCDiagnostic> prevDeferredDiags = log.deferredDiagnostics; |
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mcimadamore
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|
254 |
final JavaFileObject currentSource = log.currentSourceFile(); |
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mcimadamore
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changeset
|
255 |
try { |
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mcimadamore
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diff
changeset
|
256 |
log.deferredDiagnostics = new ListBuffer<JCDiagnostic>(); |
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|
257 |
log.deferredDiagFilter = new Filter<JCDiagnostic>() { |
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mcimadamore
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|
258 |
public boolean accepts(JCDiagnostic t) { |
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|
259 |
return t.getDiagnosticSource().getFile().equals(currentSource); |
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mcimadamore
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|
260 |
} |
b4b0377b8dba
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mcimadamore
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changeset
|
261 |
}; |
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mcimadamore
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|
262 |
attr.attribTree(newTree, speculativeEnv, resultInfo); |
b4b0377b8dba
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mcimadamore
parents:
diff
changeset
|
263 |
unenterScanner.scan(newTree); |
b4b0377b8dba
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mcimadamore
parents:
diff
changeset
|
264 |
return newTree; |
b4b0377b8dba
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mcimadamore
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|
265 |
} catch (Abort ex) { |
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//if some very bad condition occurred during deferred attribution |
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//we should dump all errors before killing javac |
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log.reportDeferredDiagnostics(); |
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throw ex; |
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} finally { |
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unenterScanner.scan(newTree); |
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log.deferredDiagFilter = prevDeferDiagsFilter; |
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log.deferredDiagnostics = prevDeferredDiags; |
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} |
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} |
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//where |
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protected TreeScanner unenterScanner = new TreeScanner() { |
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@Override |
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public void visitClassDef(JCClassDecl tree) { |
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ClassSymbol csym = tree.sym; |
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enter.typeEnvs.remove(csym); |
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chk.compiled.remove(csym.flatname); |
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syms.classes.remove(csym.flatname); |
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super.visitClassDef(tree); |
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285 |
} |
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286 |
}; |
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287 |
|
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/** |
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* A deferred context is created on each method check. A deferred context is |
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290 |
* used to keep track of information associated with the method check, such as |
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291 |
* the symbol of the method being checked, the overload resolution phase, |
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292 |
* the kind of attribution mode to be applied to deferred types and so forth. |
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293 |
* As deferred types are processed (by the method check routine) stuck AST nodes |
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* are added (as new deferred attribution nodes) to this context. The complete() |
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295 |
* routine makes sure that all pending nodes are properly processed, by |
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296 |
* progressively instantiating all inference variables on which one or more |
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* deferred attribution node is stuck. |
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298 |
*/ |
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299 |
class DeferredAttrContext { |
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300 |
|
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301 |
/** attribution mode */ |
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final AttrMode mode; |
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303 |
|
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304 |
/** symbol of the method being checked */ |
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305 |
final Symbol msym; |
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306 |
|
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307 |
/** method resolution step */ |
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308 |
final Resolve.MethodResolutionPhase phase; |
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309 |
|
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310 |
/** inference context */ |
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311 |
final InferenceContext inferenceContext; |
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312 |
|
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313 |
/** list of deferred attribution nodes to be processed */ |
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314 |
ArrayList<DeferredAttrNode> deferredAttrNodes = new ArrayList<DeferredAttrNode>(); |
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315 |
|
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316 |
DeferredAttrContext(AttrMode mode, Symbol msym, MethodResolutionPhase phase, InferenceContext inferenceContext) { |
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this.mode = mode; |
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318 |
this.msym = msym; |
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319 |
this.phase = phase; |
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320 |
this.inferenceContext = inferenceContext; |
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|
321 |
} |
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|
322 |
|
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323 |
/** |
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324 |
* Adds a node to the list of deferred attribution nodes - used by Resolve.rawCheckArgumentsApplicable |
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|
325 |
* Nodes added this way act as 'roots' for the out-of-order method checking process. |
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|
326 |
*/ |
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327 |
void addDeferredAttrNode(final DeferredType dt, ResultInfo resultInfo, List<Type> stuckVars) { |
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328 |
deferredAttrNodes.add(new DeferredAttrNode(dt, resultInfo, stuckVars)); |
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329 |
} |
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|
330 |
|
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|
331 |
/** |
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|
332 |
* Incrementally process all nodes, by skipping 'stuck' nodes and attributing |
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|
333 |
* 'unstuck' ones. If at any point no progress can be made (no 'unstuck' nodes) |
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|
334 |
* some inference variable might get eagerly instantiated so that all nodes |
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|
335 |
* can be type-checked. |
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|
336 |
*/ |
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|
337 |
void complete() { |
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|
338 |
while (!deferredAttrNodes.isEmpty()) { |
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|
339 |
Set<Type> stuckVars = new HashSet<Type>(); |
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|
340 |
boolean progress = false; |
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|
341 |
//scan a defensive copy of the node list - this is because a deferred |
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|
342 |
//attribution round can add new nodes to the list |
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|
343 |
for (DeferredAttrNode deferredAttrNode : List.from(deferredAttrNodes)) { |
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|
344 |
if (!deferredAttrNode.isStuck()) { |
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|
345 |
deferredAttrNode.process(); |
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|
346 |
deferredAttrNodes.remove(deferredAttrNode); |
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|
347 |
progress = true; |
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|
348 |
} else { |
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|
349 |
stuckVars.addAll(deferredAttrNode.stuckVars); |
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|
350 |
} |
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|
351 |
} |
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|
352 |
if (!progress) { |
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|
353 |
//remove all variables that have already been instantiated |
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|
354 |
//from the list of stuck variables |
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|
355 |
inferenceContext.solveAny(inferenceContext.freeVarsIn(List.from(stuckVars)), types, infer); |
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|
356 |
inferenceContext.notifyChange(types); |
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|
357 |
} |
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|
358 |
} |
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|
359 |
} |
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|
360 |
|
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|
361 |
/** |
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|
362 |
* Class representing a deferred attribution node. It keeps track of |
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|
363 |
* a deferred type, along with the expected target type information. |
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|
364 |
*/ |
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|
365 |
class DeferredAttrNode implements Infer.InferenceContext.FreeTypeListener { |
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|
366 |
|
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|
367 |
/** underlying deferred type */ |
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|
368 |
DeferredType dt; |
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|
369 |
|
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|
370 |
/** underlying target type information */ |
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|
371 |
ResultInfo resultInfo; |
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|
372 |
|
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|
373 |
/** list of uninferred inference variables causing this node to be stuck */ |
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|
374 |
List<Type> stuckVars; |
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|
375 |
|
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|
376 |
DeferredAttrNode(DeferredType dt, ResultInfo resultInfo, List<Type> stuckVars) { |
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|
377 |
this.dt = dt; |
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|
378 |
this.resultInfo = resultInfo; |
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|
379 |
this.stuckVars = stuckVars; |
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|
380 |
if (!stuckVars.isEmpty()) { |
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|
381 |
resultInfo.checkContext.inferenceContext().addFreeTypeListener(stuckVars, this); |
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|
382 |
} |
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|
383 |
} |
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|
384 |
|
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|
385 |
@Override |
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|
386 |
public void typesInferred(InferenceContext inferenceContext) { |
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|
387 |
stuckVars = List.nil(); |
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|
388 |
resultInfo = resultInfo.dup(inferenceContext.asInstType(resultInfo.pt, types)); |
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|
389 |
} |
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|
390 |
|
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|
391 |
/** |
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|
392 |
* is this node stuck? |
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|
393 |
*/ |
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|
394 |
boolean isStuck() { |
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|
395 |
return stuckVars.nonEmpty(); |
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|
396 |
} |
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|
397 |
|
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|
398 |
/** |
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|
399 |
* Process a deferred attribution node. |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
400 |
* Invariant: a stuck node cannot be processed. |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
401 |
*/ |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
402 |
void process() { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
403 |
if (isStuck()) { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
404 |
throw new IllegalStateException("Cannot process a stuck deferred node"); |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
405 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
406 |
dt.check(resultInfo); |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
407 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
408 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
409 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
410 |
|
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
411 |
/** an empty deferred attribution context - all methods throw exceptions */ |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
412 |
final DeferredAttrContext emptyDeferredAttrContext = |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
413 |
new DeferredAttrContext(null, null, null, null) { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
414 |
@Override |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
415 |
void addDeferredAttrNode(DeferredType dt, ResultInfo ri, List<Type> stuckVars) { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
416 |
Assert.error("Empty deferred context!"); |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
417 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
418 |
@Override |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
419 |
void complete() { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
420 |
Assert.error("Empty deferred context!"); |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
421 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
422 |
}; |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
423 |
|
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
424 |
/** |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
425 |
* Map a list of types possibly containing one or more deferred types |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
426 |
* into a list of ordinary types. Each deferred type D is mapped into a type T, |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
427 |
* where T is computed by retrieving the type that has already been |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
428 |
* computed for D during a previous deferred attribution round of the given kind. |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
429 |
*/ |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
430 |
class DeferredTypeMap extends Type.Mapping { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
431 |
|
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
432 |
DeferredAttrContext deferredAttrContext; |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
433 |
|
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
434 |
protected DeferredTypeMap(AttrMode mode, Symbol msym, MethodResolutionPhase phase) { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
435 |
super(String.format("deferredTypeMap[%s]", mode)); |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
436 |
this.deferredAttrContext = new DeferredAttrContext(mode, msym, phase, infer.emptyContext); |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
437 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
438 |
|
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
439 |
protected boolean validState(DeferredType dt) { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
440 |
return dt.mode != null && |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
441 |
deferredAttrContext.mode.ordinal() <= dt.mode.ordinal(); |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
442 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
443 |
|
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
444 |
@Override |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
445 |
public Type apply(Type t) { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
446 |
if (t.tag != DEFERRED) { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
447 |
return t.map(this); |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
448 |
} else { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
449 |
DeferredType dt = (DeferredType)t; |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
450 |
Assert.check(validState(dt)); |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
451 |
return typeOf(dt); |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
452 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
453 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
454 |
|
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
455 |
protected Type typeOf(DeferredType dt) { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
456 |
switch (deferredAttrContext.mode) { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
457 |
case CHECK: |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
458 |
return dt.tree.type == null ? Type.noType : dt.tree.type; |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
459 |
case SPECULATIVE: |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
460 |
return dt.speculativeType(deferredAttrContext.msym, deferredAttrContext.phase); |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
461 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
462 |
Assert.error(); |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
463 |
return null; |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
464 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
465 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
466 |
|
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
467 |
/** |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
468 |
* Specialized recovery deferred mapping. |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
469 |
* Each deferred type D is mapped into a type T, where T is computed either by |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
470 |
* (i) retrieving the type that has already been computed for D during a previous |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
471 |
* attribution round (as before), or (ii) by synthesizing a new type R for D |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
472 |
* (the latter step is useful in a recovery scenario). |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
473 |
*/ |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
474 |
public class RecoveryDeferredTypeMap extends DeferredTypeMap { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
475 |
|
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
476 |
public RecoveryDeferredTypeMap(AttrMode mode, Symbol msym, MethodResolutionPhase phase) { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
477 |
super(mode, msym, phase); |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
478 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
479 |
|
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
480 |
@Override |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
481 |
protected Type typeOf(DeferredType dt) { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
482 |
Type owntype = super.typeOf(dt); |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
483 |
return owntype.tag == NONE ? |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
484 |
recover(dt) : owntype; |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
485 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
486 |
|
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
487 |
@Override |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
488 |
protected boolean validState(DeferredType dt) { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
489 |
return true; |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
490 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
491 |
|
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
492 |
/** |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
493 |
* Synthesize a type for a deferred type that hasn't been previously |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
494 |
* reduced to an ordinary type. Functional deferred types and conditionals |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
495 |
* are mapped to themselves, in order to have a richer diagnostic |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
496 |
* representation. Remaining deferred types are attributed using |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
497 |
* a default expected type (j.l.Object). |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
498 |
*/ |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
499 |
private Type recover(DeferredType dt) { |
14058
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
500 |
dt.check(attr.new RecoveryInfo(deferredAttrContext)); |
14057
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
501 |
switch (TreeInfo.skipParens(dt.tree).getTag()) { |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
502 |
case LAMBDA: |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
503 |
case REFERENCE: |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
504 |
case CONDEXPR: |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
505 |
//propagate those deferred types to the |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
506 |
//diagnostic formatter |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
507 |
return dt; |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
508 |
default: |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
509 |
return super.apply(dt); |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
510 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
511 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
512 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
513 |
|
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
514 |
/** |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
515 |
* Retrieves the list of inference variables that need to be inferred before |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
516 |
* an AST node can be type-checked |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
517 |
*/ |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
518 |
@SuppressWarnings("fallthrough") |
14058
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
519 |
List<Type> stuckVars(JCTree tree, ResultInfo resultInfo) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
520 |
if (resultInfo.pt.tag == NONE || resultInfo.pt.isErroneous()) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
521 |
return List.nil(); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
522 |
} else { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
523 |
StuckChecker sc = new StuckChecker(resultInfo); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
524 |
sc.scan(tree); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
525 |
return List.from(sc.stuckVars); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
526 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
527 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
528 |
|
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
529 |
/** |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
530 |
* This visitor is used to check that structural expressions conform |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
531 |
* to their target - this step is required as inference could end up |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
532 |
* inferring types that make some of the nested expressions incompatible |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
533 |
* with their corresponding instantiated target |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
534 |
*/ |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
535 |
class StuckChecker extends TreeScanner { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
536 |
|
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
537 |
Type pt; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
538 |
Filter<JCTree> treeFilter; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
539 |
Infer.InferenceContext inferenceContext; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
540 |
Set<Type> stuckVars = new HashSet<Type>(); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
541 |
|
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
542 |
final Filter<JCTree> argsFilter = new Filter<JCTree>() { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
543 |
public boolean accepts(JCTree t) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
544 |
switch (t.getTag()) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
545 |
case CONDEXPR: |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
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parents:
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diff
changeset
|
546 |
case LAMBDA: |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
547 |
case PARENS: |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
548 |
case REFERENCE: |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
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parents:
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diff
changeset
|
549 |
return true; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
550 |
default: |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
551 |
return false; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
552 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
553 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
554 |
}; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
555 |
|
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
556 |
final Filter<JCTree> lambdaBodyFilter = new Filter<JCTree>() { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
557 |
public boolean accepts(JCTree t) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
558 |
switch (t.getTag()) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
559 |
case BLOCK: case CASE: case CATCH: case DOLOOP: |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
560 |
case FOREACHLOOP: case FORLOOP: case RETURN: |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
561 |
case SYNCHRONIZED: case SWITCH: case TRY: case WHILELOOP: |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
562 |
return true; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
563 |
default: |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
564 |
return false; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
565 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
566 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
567 |
}; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
568 |
|
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
569 |
StuckChecker(ResultInfo resultInfo) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
570 |
this.pt = resultInfo.pt; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
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parents:
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diff
changeset
|
571 |
this.inferenceContext = resultInfo.checkContext.inferenceContext(); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
572 |
this.treeFilter = argsFilter; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
573 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
574 |
|
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
575 |
@Override |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
576 |
public void scan(JCTree tree) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
577 |
if (tree != null && treeFilter.accepts(tree)) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
578 |
super.scan(tree); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
579 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
580 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
581 |
|
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
582 |
@Override |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
583 |
public void visitLambda(JCLambda tree) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
584 |
Type prevPt = pt; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
585 |
Filter<JCTree> prevFilter = treeFilter; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
586 |
try { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
587 |
if (inferenceContext.inferenceVars().contains(pt)) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
588 |
stuckVars.add(pt); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
589 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
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diff
changeset
|
590 |
if (!types.isFunctionalInterface(pt.tsym)) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
591 |
return; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
592 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
593 |
Type descType = types.findDescriptorType(pt); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
594 |
List<Type> freeArgVars = inferenceContext.freeVarsIn(descType.getParameterTypes()); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
595 |
if (!TreeInfo.isExplicitLambda(tree) && |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
596 |
freeArgVars.nonEmpty()) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
597 |
stuckVars.addAll(freeArgVars); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
598 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
599 |
pt = descType.getReturnType(); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
600 |
if (tree.getBodyKind() == JCTree.JCLambda.BodyKind.EXPRESSION) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
601 |
scan(tree.getBody()); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
602 |
} else { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
603 |
treeFilter = lambdaBodyFilter; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
604 |
super.visitLambda(tree); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
605 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
606 |
} finally { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
607 |
pt = prevPt; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
608 |
treeFilter = prevFilter; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
609 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
610 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
611 |
|
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
612 |
@Override |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
613 |
public void visitReference(JCMemberReference tree) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
614 |
scan(tree.expr); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
615 |
if (inferenceContext.inferenceVars().contains(pt)) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
616 |
stuckVars.add(pt); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
617 |
return; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
618 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
619 |
if (!types.isFunctionalInterface(pt.tsym)) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
620 |
return; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
621 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
622 |
Type descType = types.findDescriptorType(pt); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
623 |
List<Type> freeArgVars = inferenceContext.freeVarsIn(descType.getParameterTypes()); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
624 |
stuckVars.addAll(freeArgVars); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
625 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
626 |
|
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
627 |
@Override |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
628 |
public void visitReturn(JCReturn tree) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
629 |
Filter<JCTree> prevFilter = treeFilter; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
630 |
try { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
631 |
treeFilter = argsFilter; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
632 |
if (tree.expr != null) { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
633 |
scan(tree.expr); |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
634 |
} |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
635 |
} finally { |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
636 |
treeFilter = prevFilter; |
c7ec7facdd20
7177385: Add attribution support for lambda expressions
mcimadamore
parents:
14057
diff
changeset
|
637 |
} |
14057
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
638 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
639 |
} |
b4b0377b8dba
7177387: Add target-typing support in method context
mcimadamore
parents:
diff
changeset
|
640 |
} |