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src/share/classes/com/sun/tools/javac/comp/MemberEnter.java@b02f28bf7f1c
src/share/classes/com/sun/tools/javac/comp/MemberEnter.java
Thu, 25 Jul 2013 14:49:16 +0100
- author
- mcimadamore
- date
- Thu, 25 Jul 2013 14:49:16 +0100
- changeset 1920
- b02f28bf7f1c
- parent 1906
- 10711bd8bb2d
- child 1945
- f7f271bd74a2
- permissions
- -rw-r--r--
8016081: field initialized with lambda in annotation types doesn't compile
Summary: check for annotation attributes should skip over synthetic methods
Reviewed-by: jjg
1 /*
2 * Copyright (c) 2003, 2013, 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 java.util.HashMap;
29 import java.util.HashSet;
30 import java.util.LinkedHashMap;
31 import java.util.Map;
32 import java.util.Set;
34 import javax.tools.JavaFileObject;
36 import com.sun.tools.javac.code.*;
37 import com.sun.tools.javac.jvm.*;
38 import com.sun.tools.javac.tree.*;
39 import com.sun.tools.javac.util.*;
41 import com.sun.tools.javac.code.Type.*;
42 import com.sun.tools.javac.code.Symbol.*;
43 import com.sun.tools.javac.tree.JCTree.*;
45 import static com.sun.tools.javac.code.Flags.*;
46 import static com.sun.tools.javac.code.Flags.ANNOTATION;
47 import static com.sun.tools.javac.code.Kinds.*;
48 import static com.sun.tools.javac.code.TypeTag.CLASS;
49 import static com.sun.tools.javac.code.TypeTag.ERROR;
50 import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
51 import static com.sun.tools.javac.tree.JCTree.Tag.*;
52 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag;
53 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
55 /** This is the second phase of Enter, in which classes are completed
56 * by entering their members into the class scope using
57 * MemberEnter.complete(). See Enter for an overview.
58 *
59 * <p><b>This is NOT part of any supported API.
60 * If you write code that depends on this, you do so at your own risk.
61 * This code and its internal interfaces are subject to change or
62 * deletion without notice.</b>
63 */
64 public class MemberEnter extends JCTree.Visitor implements Completer {
65 protected static final Context.Key<MemberEnter> memberEnterKey =
66 new Context.Key<MemberEnter>();
68 /** A switch to determine whether we check for package/class conflicts
69 */
70 final static boolean checkClash = true;
72 private final Names names;
73 private final Enter enter;
74 private final Log log;
75 private final Check chk;
76 private final Attr attr;
77 private final Symtab syms;
78 private final TreeMaker make;
79 private final ClassReader reader;
80 private final Todo todo;
81 private final Annotate annotate;
82 private final Types types;
83 private final JCDiagnostic.Factory diags;
84 private final Source source;
85 private final Target target;
86 private final DeferredLintHandler deferredLintHandler;
88 public static MemberEnter instance(Context context) {
89 MemberEnter instance = context.get(memberEnterKey);
90 if (instance == null)
91 instance = new MemberEnter(context);
92 return instance;
93 }
95 protected MemberEnter(Context context) {
96 context.put(memberEnterKey, this);
97 names = Names.instance(context);
98 enter = Enter.instance(context);
99 log = Log.instance(context);
100 chk = Check.instance(context);
101 attr = Attr.instance(context);
102 syms = Symtab.instance(context);
103 make = TreeMaker.instance(context);
104 reader = ClassReader.instance(context);
105 todo = Todo.instance(context);
106 annotate = Annotate.instance(context);
107 types = Types.instance(context);
108 diags = JCDiagnostic.Factory.instance(context);
109 source = Source.instance(context);
110 target = Target.instance(context);
111 deferredLintHandler = DeferredLintHandler.instance(context);
112 allowTypeAnnos = source.allowTypeAnnotations();
113 }
115 /** Switch: support type annotations.
116 */
117 boolean allowTypeAnnos;
119 /** A queue for classes whose members still need to be entered into the
120 * symbol table.
121 */
122 ListBuffer<Env<AttrContext>> halfcompleted = new ListBuffer<Env<AttrContext>>();
124 /** Set to true only when the first of a set of classes is
125 * processed from the half completed queue.
126 */
127 boolean isFirst = true;
129 /** A flag to disable completion from time to time during member
130 * enter, as we only need to look up types. This avoids
131 * unnecessarily deep recursion.
132 */
133 boolean completionEnabled = true;
135 /* ---------- Processing import clauses ----------------
136 */
138 /** Import all classes of a class or package on demand.
139 * @param pos Position to be used for error reporting.
140 * @param tsym The class or package the members of which are imported.
141 * @param env The env in which the imported classes will be entered.
142 */
143 private void importAll(int pos,
144 final TypeSymbol tsym,
145 Env<AttrContext> env) {
146 // Check that packages imported from exist (JLS ???).
147 if (tsym.kind == PCK && tsym.members().elems == null && !tsym.exists()) {
148 // If we can't find java.lang, exit immediately.
149 if (((PackageSymbol)tsym).fullname.equals(names.java_lang)) {
150 JCDiagnostic msg = diags.fragment("fatal.err.no.java.lang");
151 throw new FatalError(msg);
152 } else {
153 log.error(DiagnosticFlag.RESOLVE_ERROR, pos, "doesnt.exist", tsym);
154 }
155 }
156 env.toplevel.starImportScope.importAll(tsym.members());
157 }
159 /** Import all static members of a class or package on demand.
160 * @param pos Position to be used for error reporting.
161 * @param tsym The class or package the members of which are imported.
162 * @param env The env in which the imported classes will be entered.
163 */
164 private void importStaticAll(int pos,
165 final TypeSymbol tsym,
166 Env<AttrContext> env) {
167 final JavaFileObject sourcefile = env.toplevel.sourcefile;
168 final Scope toScope = env.toplevel.starImportScope;
169 final PackageSymbol packge = env.toplevel.packge;
170 final TypeSymbol origin = tsym;
172 // enter imported types immediately
173 new Object() {
174 Set<Symbol> processed = new HashSet<Symbol>();
175 void importFrom(TypeSymbol tsym) {
176 if (tsym == null || !processed.add(tsym))
177 return;
179 // also import inherited names
180 importFrom(types.supertype(tsym.type).tsym);
181 for (Type t : types.interfaces(tsym.type))
182 importFrom(t.tsym);
184 final Scope fromScope = tsym.members();
185 for (Scope.Entry e = fromScope.elems; e != null; e = e.sibling) {
186 Symbol sym = e.sym;
187 if (sym.kind == TYP &&
188 (sym.flags() & STATIC) != 0 &&
189 staticImportAccessible(sym, packge) &&
190 sym.isMemberOf(origin, types) &&
191 !toScope.includes(sym))
192 toScope.enter(sym, fromScope, origin.members());
193 }
194 }
195 }.importFrom(tsym);
197 // enter non-types before annotations that might use them
198 annotate.earlier(new Annotate.Annotator() {
199 Set<Symbol> processed = new HashSet<Symbol>();
201 public String toString() {
202 return "import static " + tsym + ".*" + " in " + sourcefile;
203 }
204 void importFrom(TypeSymbol tsym) {
205 if (tsym == null || !processed.add(tsym))
206 return;
208 // also import inherited names
209 importFrom(types.supertype(tsym.type).tsym);
210 for (Type t : types.interfaces(tsym.type))
211 importFrom(t.tsym);
213 final Scope fromScope = tsym.members();
214 for (Scope.Entry e = fromScope.elems; e != null; e = e.sibling) {
215 Symbol sym = e.sym;
216 if (sym.isStatic() && sym.kind != TYP &&
217 staticImportAccessible(sym, packge) &&
218 !toScope.includes(sym) &&
219 sym.isMemberOf(origin, types)) {
220 toScope.enter(sym, fromScope, origin.members());
221 }
222 }
223 }
224 public void enterAnnotation() {
225 importFrom(tsym);
226 }
227 });
228 }
230 // is the sym accessible everywhere in packge?
231 boolean staticImportAccessible(Symbol sym, PackageSymbol packge) {
232 int flags = (int)(sym.flags() & AccessFlags);
233 switch (flags) {
234 default:
235 case PUBLIC:
236 return true;
237 case PRIVATE:
238 return false;
239 case 0:
240 case PROTECTED:
241 return sym.packge() == packge;
242 }
243 }
245 /** Import statics types of a given name. Non-types are handled in Attr.
246 * @param pos Position to be used for error reporting.
247 * @param tsym The class from which the name is imported.
248 * @param name The (simple) name being imported.
249 * @param env The environment containing the named import
250 * scope to add to.
251 */
252 private void importNamedStatic(final DiagnosticPosition pos,
253 final TypeSymbol tsym,
254 final Name name,
255 final Env<AttrContext> env) {
256 if (tsym.kind != TYP) {
257 log.error(DiagnosticFlag.RECOVERABLE, pos, "static.imp.only.classes.and.interfaces");
258 return;
259 }
261 final Scope toScope = env.toplevel.namedImportScope;
262 final PackageSymbol packge = env.toplevel.packge;
263 final TypeSymbol origin = tsym;
265 // enter imported types immediately
266 new Object() {
267 Set<Symbol> processed = new HashSet<Symbol>();
268 void importFrom(TypeSymbol tsym) {
269 if (tsym == null || !processed.add(tsym))
270 return;
272 // also import inherited names
273 importFrom(types.supertype(tsym.type).tsym);
274 for (Type t : types.interfaces(tsym.type))
275 importFrom(t.tsym);
277 for (Scope.Entry e = tsym.members().lookup(name);
278 e.scope != null;
279 e = e.next()) {
280 Symbol sym = e.sym;
281 if (sym.isStatic() &&
282 sym.kind == TYP &&
283 staticImportAccessible(sym, packge) &&
284 sym.isMemberOf(origin, types) &&
285 chk.checkUniqueStaticImport(pos, sym, toScope))
286 toScope.enter(sym, sym.owner.members(), origin.members());
287 }
288 }
289 }.importFrom(tsym);
291 // enter non-types before annotations that might use them
292 annotate.earlier(new Annotate.Annotator() {
293 Set<Symbol> processed = new HashSet<Symbol>();
294 boolean found = false;
296 public String toString() {
297 return "import static " + tsym + "." + name;
298 }
299 void importFrom(TypeSymbol tsym) {
300 if (tsym == null || !processed.add(tsym))
301 return;
303 // also import inherited names
304 importFrom(types.supertype(tsym.type).tsym);
305 for (Type t : types.interfaces(tsym.type))
306 importFrom(t.tsym);
308 for (Scope.Entry e = tsym.members().lookup(name);
309 e.scope != null;
310 e = e.next()) {
311 Symbol sym = e.sym;
312 if (sym.isStatic() &&
313 staticImportAccessible(sym, packge) &&
314 sym.isMemberOf(origin, types)) {
315 found = true;
316 if (sym.kind == MTH ||
317 sym.kind != TYP && chk.checkUniqueStaticImport(pos, sym, toScope))
318 toScope.enter(sym, sym.owner.members(), origin.members());
319 }
320 }
321 }
322 public void enterAnnotation() {
323 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
324 try {
325 importFrom(tsym);
326 if (!found) {
327 log.error(pos, "cant.resolve.location",
328 KindName.STATIC,
329 name, List.<Type>nil(), List.<Type>nil(),
330 Kinds.typeKindName(tsym.type),
331 tsym.type);
332 }
333 } finally {
334 log.useSource(prev);
335 }
336 }
337 });
338 }
339 /** Import given class.
340 * @param pos Position to be used for error reporting.
341 * @param tsym The class to be imported.
342 * @param env The environment containing the named import
343 * scope to add to.
344 */
345 private void importNamed(DiagnosticPosition pos, Symbol tsym, Env<AttrContext> env) {
346 if (tsym.kind == TYP &&
347 chk.checkUniqueImport(pos, tsym, env.toplevel.namedImportScope))
348 env.toplevel.namedImportScope.enter(tsym, tsym.owner.members());
349 }
351 /** Construct method type from method signature.
352 * @param typarams The method's type parameters.
353 * @param params The method's value parameters.
354 * @param res The method's result type,
355 * null if it is a constructor.
356 * @param recvparam The method's receiver parameter,
357 * null if none given; TODO: or already set here?
358 * @param thrown The method's thrown exceptions.
359 * @param env The method's (local) environment.
360 */
361 Type signature(MethodSymbol msym,
362 List<JCTypeParameter> typarams,
363 List<JCVariableDecl> params,
364 JCTree res,
365 JCVariableDecl recvparam,
366 List<JCExpression> thrown,
367 Env<AttrContext> env) {
369 // Enter and attribute type parameters.
370 List<Type> tvars = enter.classEnter(typarams, env);
371 attr.attribTypeVariables(typarams, env);
373 // Enter and attribute value parameters.
374 ListBuffer<Type> argbuf = new ListBuffer<Type>();
375 for (List<JCVariableDecl> l = params; l.nonEmpty(); l = l.tail) {
376 memberEnter(l.head, env);
377 argbuf.append(l.head.vartype.type);
378 }
380 // Attribute result type, if one is given.
381 Type restype = res == null ? syms.voidType : attr.attribType(res, env);
383 // Attribute receiver type, if one is given.
384 Type recvtype;
385 if (recvparam!=null) {
386 memberEnter(recvparam, env);
387 recvtype = recvparam.vartype.type;
388 } else {
389 recvtype = null;
390 }
392 // Attribute thrown exceptions.
393 ListBuffer<Type> thrownbuf = new ListBuffer<Type>();
394 for (List<JCExpression> l = thrown; l.nonEmpty(); l = l.tail) {
395 Type exc = attr.attribType(l.head, env);
396 if (!exc.hasTag(TYPEVAR)) {
397 exc = chk.checkClassType(l.head.pos(), exc);
398 } else if (exc.tsym.owner == msym) {
399 //mark inference variables in 'throws' clause
400 exc.tsym.flags_field |= THROWS;
401 }
402 thrownbuf.append(exc);
403 }
404 MethodType mtype = new MethodType(argbuf.toList(),
405 restype,
406 thrownbuf.toList(),
407 syms.methodClass);
408 mtype.recvtype = recvtype;
410 return tvars.isEmpty() ? mtype : new ForAll(tvars, mtype);
411 }
413 /* ********************************************************************
414 * Visitor methods for member enter
415 *********************************************************************/
417 /** Visitor argument: the current environment
418 */
419 protected Env<AttrContext> env;
421 /** Enter field and method definitions and process import
422 * clauses, catching any completion failure exceptions.
423 */
424 protected void memberEnter(JCTree tree, Env<AttrContext> env) {
425 Env<AttrContext> prevEnv = this.env;
426 try {
427 this.env = env;
428 tree.accept(this);
429 } catch (CompletionFailure ex) {
430 chk.completionError(tree.pos(), ex);
431 } finally {
432 this.env = prevEnv;
433 }
434 }
436 /** Enter members from a list of trees.
437 */
438 void memberEnter(List<? extends JCTree> trees, Env<AttrContext> env) {
439 for (List<? extends JCTree> l = trees; l.nonEmpty(); l = l.tail)
440 memberEnter(l.head, env);
441 }
443 /** Enter members for a class.
444 */
445 void finishClass(JCClassDecl tree, Env<AttrContext> env) {
446 if ((tree.mods.flags & Flags.ENUM) != 0 &&
447 (types.supertype(tree.sym.type).tsym.flags() & Flags.ENUM) == 0) {
448 addEnumMembers(tree, env);
449 }
450 memberEnter(tree.defs, env);
451 }
453 /** Add the implicit members for an enum type
454 * to the symbol table.
455 */
456 private void addEnumMembers(JCClassDecl tree, Env<AttrContext> env) {
457 JCExpression valuesType = make.Type(new ArrayType(tree.sym.type, syms.arrayClass));
459 // public static T[] values() { return ???; }
460 JCMethodDecl values = make.
461 MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC),
462 names.values,
463 valuesType,
464 List.<JCTypeParameter>nil(),
465 List.<JCVariableDecl>nil(),
466 List.<JCExpression>nil(), // thrown
467 null, //make.Block(0, Tree.emptyList.prepend(make.Return(make.Ident(names._null)))),
468 null);
469 memberEnter(values, env);
471 // public static T valueOf(String name) { return ???; }
472 JCMethodDecl valueOf = make.
473 MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC),
474 names.valueOf,
475 make.Type(tree.sym.type),
476 List.<JCTypeParameter>nil(),
477 List.of(make.VarDef(make.Modifiers(Flags.PARAMETER |
478 Flags.MANDATED),
479 names.fromString("name"),
480 make.Type(syms.stringType), null)),
481 List.<JCExpression>nil(), // thrown
482 null, //make.Block(0, Tree.emptyList.prepend(make.Return(make.Ident(names._null)))),
483 null);
484 memberEnter(valueOf, env);
485 }
487 public void visitTopLevel(JCCompilationUnit tree) {
488 if (tree.starImportScope.elems != null) {
489 // we must have already processed this toplevel
490 return;
491 }
493 // check that no class exists with same fully qualified name as
494 // toplevel package
495 if (checkClash && tree.pid != null) {
496 Symbol p = tree.packge;
497 while (p.owner != syms.rootPackage) {
498 p.owner.complete(); // enter all class members of p
499 if (syms.classes.get(p.getQualifiedName()) != null) {
500 log.error(tree.pos,
501 "pkg.clashes.with.class.of.same.name",
502 p);
503 }
504 p = p.owner;
505 }
506 }
508 // process package annotations
509 annotateLater(tree.packageAnnotations, env, tree.packge);
511 DeferredLintHandler prevLintHandler = chk.setDeferredLintHandler(DeferredLintHandler.immediateHandler);
513 try {
514 // Import-on-demand java.lang.
515 importAll(tree.pos, reader.enterPackage(names.java_lang), env);
517 // Process all import clauses.
518 memberEnter(tree.defs, env);
519 } finally {
520 chk.setDeferredLintHandler(prevLintHandler);
521 }
522 }
524 // process the non-static imports and the static imports of types.
525 public void visitImport(JCImport tree) {
526 JCFieldAccess imp = (JCFieldAccess)tree.qualid;
527 Name name = TreeInfo.name(imp);
529 // Create a local environment pointing to this tree to disable
530 // effects of other imports in Resolve.findGlobalType
531 Env<AttrContext> localEnv = env.dup(tree);
533 TypeSymbol p = attr.attribImportQualifier(tree, localEnv).tsym;
534 if (name == names.asterisk) {
535 // Import on demand.
536 chk.checkCanonical(imp.selected);
537 if (tree.staticImport)
538 importStaticAll(tree.pos, p, env);
539 else
540 importAll(tree.pos, p, env);
541 } else {
542 // Named type import.
543 if (tree.staticImport) {
544 importNamedStatic(tree.pos(), p, name, localEnv);
545 chk.checkCanonical(imp.selected);
546 } else {
547 TypeSymbol c = attribImportType(imp, localEnv).tsym;
548 chk.checkCanonical(imp);
549 importNamed(tree.pos(), c, env);
550 }
551 }
552 }
554 public void visitMethodDef(JCMethodDecl tree) {
555 Scope enclScope = enter.enterScope(env);
556 MethodSymbol m = new MethodSymbol(0, tree.name, null, enclScope.owner);
557 m.flags_field = chk.checkFlags(tree.pos(), tree.mods.flags, m, tree);
558 tree.sym = m;
560 //if this is a default method, add the DEFAULT flag to the enclosing interface
561 if ((tree.mods.flags & DEFAULT) != 0) {
562 m.enclClass().flags_field |= DEFAULT;
563 }
565 Env<AttrContext> localEnv = methodEnv(tree, env);
567 DeferredLintHandler prevLintHandler =
568 chk.setDeferredLintHandler(deferredLintHandler.setPos(tree.pos()));
569 try {
570 // Compute the method type
571 m.type = signature(m, tree.typarams, tree.params,
572 tree.restype, tree.recvparam,
573 tree.thrown,
574 localEnv);
575 } finally {
576 chk.setDeferredLintHandler(prevLintHandler);
577 }
579 if (types.isSignaturePolymorphic(m)) {
580 m.flags_field |= SIGNATURE_POLYMORPHIC;
581 }
583 // Set m.params
584 ListBuffer<VarSymbol> params = new ListBuffer<VarSymbol>();
585 JCVariableDecl lastParam = null;
586 for (List<JCVariableDecl> l = tree.params; l.nonEmpty(); l = l.tail) {
587 JCVariableDecl param = lastParam = l.head;
588 params.append(Assert.checkNonNull(param.sym));
589 }
590 m.params = params.toList();
592 // mark the method varargs, if necessary
593 if (lastParam != null && (lastParam.mods.flags & Flags.VARARGS) != 0)
594 m.flags_field |= Flags.VARARGS;
596 localEnv.info.scope.leave();
597 if (chk.checkUnique(tree.pos(), m, enclScope)) {
598 enclScope.enter(m);
599 }
600 annotateLater(tree.mods.annotations, localEnv, m);
601 // Visit the signature of the method. Note that
602 // TypeAnnotate doesn't descend into the body.
603 typeAnnotate(tree, localEnv, m);
605 if (tree.defaultValue != null)
606 annotateDefaultValueLater(tree.defaultValue, localEnv, m);
607 }
609 /** Create a fresh environment for method bodies.
610 * @param tree The method definition.
611 * @param env The environment current outside of the method definition.
612 */
613 Env<AttrContext> methodEnv(JCMethodDecl tree, Env<AttrContext> env) {
614 Env<AttrContext> localEnv =
615 env.dup(tree, env.info.dup(env.info.scope.dupUnshared()));
616 localEnv.enclMethod = tree;
617 localEnv.info.scope.owner = tree.sym;
618 if (tree.sym.type != null) {
619 //when this is called in the enter stage, there's no type to be set
620 localEnv.info.returnResult = attr.new ResultInfo(VAL, tree.sym.type.getReturnType());
621 }
622 if ((tree.mods.flags & STATIC) != 0) localEnv.info.staticLevel++;
623 return localEnv;
624 }
626 public void visitVarDef(JCVariableDecl tree) {
627 Env<AttrContext> localEnv = env;
628 if ((tree.mods.flags & STATIC) != 0 ||
629 (env.info.scope.owner.flags() & INTERFACE) != 0) {
630 localEnv = env.dup(tree, env.info.dup());
631 localEnv.info.staticLevel++;
632 }
633 DeferredLintHandler prevLintHandler =
634 chk.setDeferredLintHandler(deferredLintHandler.setPos(tree.pos()));
635 try {
636 if (TreeInfo.isEnumInit(tree)) {
637 attr.attribIdentAsEnumType(localEnv, (JCIdent)tree.vartype);
638 } else {
639 // Make sure type annotations are processed.
640 // But we don't have a symbol to attach them to yet - use null.
641 typeAnnotate(tree.vartype, env, null);
642 attr.attribType(tree.vartype, localEnv);
643 if (tree.nameexpr != null) {
644 attr.attribExpr(tree.nameexpr, localEnv);
645 MethodSymbol m = localEnv.enclMethod.sym;
646 if (m.isConstructor()) {
647 Type outertype = m.owner.owner.type;
648 if (outertype.hasTag(TypeTag.CLASS)) {
649 checkType(tree.vartype, outertype, "incorrect.constructor.receiver.type");
650 checkType(tree.nameexpr, outertype, "incorrect.constructor.receiver.name");
651 } else {
652 log.error(tree, "receiver.parameter.not.applicable.constructor.toplevel.class");
653 }
654 } else {
655 checkType(tree.vartype, m.owner.type, "incorrect.receiver.type");
656 checkType(tree.nameexpr, m.owner.type, "incorrect.receiver.name");
657 }
658 }
659 }
660 } finally {
661 chk.setDeferredLintHandler(prevLintHandler);
662 }
664 if ((tree.mods.flags & VARARGS) != 0) {
665 //if we are entering a varargs parameter, we need to replace its type
666 //(a plain array type) with the more precise VarargsType --- we need
667 //to do it this way because varargs is represented in the tree as a modifier
668 //on the parameter declaration, and not as a distinct type of array node.
669 ArrayType atype = (ArrayType)tree.vartype.type.unannotatedType();
670 tree.vartype.type = atype.makeVarargs();
671 }
672 Scope enclScope = enter.enterScope(env);
673 VarSymbol v =
674 new VarSymbol(0, tree.name, tree.vartype.type, enclScope.owner);
675 v.flags_field = chk.checkFlags(tree.pos(), tree.mods.flags, v, tree);
676 tree.sym = v;
677 if (tree.init != null) {
678 v.flags_field |= HASINIT;
679 if ((v.flags_field & FINAL) != 0 &&
680 !tree.init.hasTag(NEWCLASS) &&
681 !tree.init.hasTag(LAMBDA)) {
682 Env<AttrContext> initEnv = getInitEnv(tree, env);
683 initEnv.info.enclVar = v;
684 v.setLazyConstValue(initEnv(tree, initEnv), attr, tree.init);
685 }
686 }
687 if (chk.checkUnique(tree.pos(), v, enclScope)) {
688 chk.checkTransparentVar(tree.pos(), v, enclScope);
689 enclScope.enter(v);
690 }
691 annotateLater(tree.mods.annotations, localEnv, v);
692 typeAnnotate(tree.vartype, env, v);
693 annotate.flush();
694 v.pos = tree.pos;
695 }
696 // where
697 void checkType(JCTree tree, Type type, String diag) {
698 if (!tree.type.isErroneous() && !types.isSameType(tree.type, type)) {
699 log.error(tree, diag, type, tree.type);
700 }
701 }
703 /** Create a fresh environment for a variable's initializer.
704 * If the variable is a field, the owner of the environment's scope
705 * is be the variable itself, otherwise the owner is the method
706 * enclosing the variable definition.
707 *
708 * @param tree The variable definition.
709 * @param env The environment current outside of the variable definition.
710 */
711 Env<AttrContext> initEnv(JCVariableDecl tree, Env<AttrContext> env) {
712 Env<AttrContext> localEnv = env.dupto(new AttrContextEnv(tree, env.info.dup()));
713 if (tree.sym.owner.kind == TYP) {
714 localEnv.info.scope = env.info.scope.dupUnshared();
715 localEnv.info.scope.owner = tree.sym;
716 }
717 if ((tree.mods.flags & STATIC) != 0 ||
718 ((env.enclClass.sym.flags() & INTERFACE) != 0 && env.enclMethod == null))
719 localEnv.info.staticLevel++;
720 return localEnv;
721 }
723 /** Default member enter visitor method: do nothing
724 */
725 public void visitTree(JCTree tree) {
726 }
728 public void visitErroneous(JCErroneous tree) {
729 if (tree.errs != null)
730 memberEnter(tree.errs, env);
731 }
733 public Env<AttrContext> getMethodEnv(JCMethodDecl tree, Env<AttrContext> env) {
734 Env<AttrContext> mEnv = methodEnv(tree, env);
735 mEnv.info.lint = mEnv.info.lint.augment(tree.sym);
736 for (List<JCTypeParameter> l = tree.typarams; l.nonEmpty(); l = l.tail)
737 mEnv.info.scope.enterIfAbsent(l.head.type.tsym);
738 for (List<JCVariableDecl> l = tree.params; l.nonEmpty(); l = l.tail)
739 mEnv.info.scope.enterIfAbsent(l.head.sym);
740 return mEnv;
741 }
743 public Env<AttrContext> getInitEnv(JCVariableDecl tree, Env<AttrContext> env) {
744 Env<AttrContext> iEnv = initEnv(tree, env);
745 return iEnv;
746 }
748 /* ********************************************************************
749 * Type completion
750 *********************************************************************/
752 Type attribImportType(JCTree tree, Env<AttrContext> env) {
753 Assert.check(completionEnabled);
754 try {
755 // To prevent deep recursion, suppress completion of some
756 // types.
757 completionEnabled = false;
758 return attr.attribType(tree, env);
759 } finally {
760 completionEnabled = true;
761 }
762 }
764 /* ********************************************************************
765 * Annotation processing
766 *********************************************************************/
768 /** Queue annotations for later processing. */
769 void annotateLater(final List<JCAnnotation> annotations,
770 final Env<AttrContext> localEnv,
771 final Symbol s) {
772 if (annotations.isEmpty()) {
773 return;
774 }
775 if (s.kind != PCK) {
776 s.resetAnnotations(); // mark Annotations as incomplete for now
777 }
778 annotate.normal(new Annotate.Annotator() {
779 @Override
780 public String toString() {
781 return "annotate " + annotations + " onto " + s + " in " + s.owner;
782 }
784 @Override
785 public void enterAnnotation() {
786 Assert.check(s.kind == PCK || s.annotationsPendingCompletion());
787 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
788 try {
789 if (s.hasAnnotations() &&
790 annotations.nonEmpty())
791 log.error(annotations.head.pos,
792 "already.annotated",
793 kindName(s), s);
794 actualEnterAnnotations(annotations, localEnv, s);
795 } finally {
796 log.useSource(prev);
797 }
798 }
799 });
800 }
802 /**
803 * Check if a list of annotations contains a reference to
804 * java.lang.Deprecated.
805 **/
806 private boolean hasDeprecatedAnnotation(List<JCAnnotation> annotations) {
807 for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) {
808 JCAnnotation a = al.head;
809 if (a.annotationType.type == syms.deprecatedType && a.args.isEmpty())
810 return true;
811 }
812 return false;
813 }
815 /** Enter a set of annotations. */
816 private void actualEnterAnnotations(List<JCAnnotation> annotations,
817 Env<AttrContext> env,
818 Symbol s) {
819 Map<TypeSymbol, ListBuffer<Attribute.Compound>> annotated =
820 new LinkedHashMap<TypeSymbol, ListBuffer<Attribute.Compound>>();
821 Map<Attribute.Compound, DiagnosticPosition> pos =
822 new HashMap<Attribute.Compound, DiagnosticPosition>();
824 for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) {
825 JCAnnotation a = al.head;
826 Attribute.Compound c = annotate.enterAnnotation(a,
827 syms.annotationType,
828 env);
829 if (c == null) {
830 continue;
831 }
833 if (annotated.containsKey(a.type.tsym)) {
834 if (source.allowRepeatedAnnotations()) {
835 ListBuffer<Attribute.Compound> l = annotated.get(a.type.tsym);
836 l = l.append(c);
837 annotated.put(a.type.tsym, l);
838 pos.put(c, a.pos());
839 } else {
840 log.error(a.pos(), "duplicate.annotation");
841 }
842 } else {
843 annotated.put(a.type.tsym, ListBuffer.of(c));
844 pos.put(c, a.pos());
845 }
847 // Note: @Deprecated has no effect on local variables and parameters
848 if (!c.type.isErroneous()
849 && s.owner.kind != MTH
850 && types.isSameType(c.type, syms.deprecatedType)) {
851 s.flags_field |= Flags.DEPRECATED;
852 }
853 }
855 s.setDeclarationAttributesWithCompletion(
856 annotate.new AnnotateRepeatedContext<Attribute.Compound>(env, annotated, pos, log, false));
857 }
859 /** Queue processing of an attribute default value. */
860 void annotateDefaultValueLater(final JCExpression defaultValue,
861 final Env<AttrContext> localEnv,
862 final MethodSymbol m) {
863 annotate.normal(new Annotate.Annotator() {
864 @Override
865 public String toString() {
866 return "annotate " + m.owner + "." +
867 m + " default " + defaultValue;
868 }
870 @Override
871 public void enterAnnotation() {
872 JavaFileObject prev = log.useSource(localEnv.toplevel.sourcefile);
873 try {
874 enterDefaultValue(defaultValue, localEnv, m);
875 } finally {
876 log.useSource(prev);
877 }
878 }
879 });
880 }
882 /** Enter a default value for an attribute method. */
883 private void enterDefaultValue(final JCExpression defaultValue,
884 final Env<AttrContext> localEnv,
885 final MethodSymbol m) {
886 m.defaultValue = annotate.enterAttributeValue(m.type.getReturnType(),
887 defaultValue,
888 localEnv);
889 }
891 /* ********************************************************************
892 * Source completer
893 *********************************************************************/
895 /** Complete entering a class.
896 * @param sym The symbol of the class to be completed.
897 */
898 public void complete(Symbol sym) throws CompletionFailure {
899 // Suppress some (recursive) MemberEnter invocations
900 if (!completionEnabled) {
901 // Re-install same completer for next time around and return.
902 Assert.check((sym.flags() & Flags.COMPOUND) == 0);
903 sym.completer = this;
904 return;
905 }
907 ClassSymbol c = (ClassSymbol)sym;
908 ClassType ct = (ClassType)c.type;
909 Env<AttrContext> env = enter.typeEnvs.get(c);
910 JCClassDecl tree = (JCClassDecl)env.tree;
911 boolean wasFirst = isFirst;
912 isFirst = false;
914 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
915 try {
916 // Save class environment for later member enter (2) processing.
917 halfcompleted.append(env);
919 // Mark class as not yet attributed.
920 c.flags_field |= UNATTRIBUTED;
922 // If this is a toplevel-class, make sure any preceding import
923 // clauses have been seen.
924 if (c.owner.kind == PCK) {
925 memberEnter(env.toplevel, env.enclosing(TOPLEVEL));
926 todo.append(env);
927 }
929 if (c.owner.kind == TYP)
930 c.owner.complete();
932 // create an environment for evaluating the base clauses
933 Env<AttrContext> baseEnv = baseEnv(tree, env);
935 if (tree.extending != null)
936 typeAnnotate(tree.extending, baseEnv, sym);
937 for (JCExpression impl : tree.implementing)
938 typeAnnotate(impl, baseEnv, sym);
939 annotate.flush();
941 // Determine supertype.
942 Type supertype =
943 (tree.extending != null)
944 ? attr.attribBase(tree.extending, baseEnv, true, false, true)
945 : ((tree.mods.flags & Flags.ENUM) != 0)
946 ? attr.attribBase(enumBase(tree.pos, c), baseEnv,
947 true, false, false)
948 : (c.fullname == names.java_lang_Object)
949 ? Type.noType
950 : syms.objectType;
951 ct.supertype_field = modelMissingTypes(supertype, tree.extending, false);
953 // Determine interfaces.
954 ListBuffer<Type> interfaces = new ListBuffer<Type>();
955 ListBuffer<Type> all_interfaces = null; // lazy init
956 Set<Type> interfaceSet = new HashSet<Type>();
957 List<JCExpression> interfaceTrees = tree.implementing;
958 for (JCExpression iface : interfaceTrees) {
959 Type i = attr.attribBase(iface, baseEnv, false, true, true);
960 if (i.hasTag(CLASS)) {
961 interfaces.append(i);
962 if (all_interfaces != null) all_interfaces.append(i);
963 chk.checkNotRepeated(iface.pos(), types.erasure(i), interfaceSet);
964 } else {
965 if (all_interfaces == null)
966 all_interfaces = new ListBuffer<Type>().appendList(interfaces);
967 all_interfaces.append(modelMissingTypes(i, iface, true));
968 }
969 }
970 if ((c.flags_field & ANNOTATION) != 0) {
971 ct.interfaces_field = List.of(syms.annotationType);
972 ct.all_interfaces_field = ct.interfaces_field;
973 } else {
974 ct.interfaces_field = interfaces.toList();
975 ct.all_interfaces_field = (all_interfaces == null)
976 ? ct.interfaces_field : all_interfaces.toList();
977 }
979 if (c.fullname == names.java_lang_Object) {
980 if (tree.extending != null) {
981 chk.checkNonCyclic(tree.extending.pos(),
982 supertype);
983 ct.supertype_field = Type.noType;
984 }
985 else if (tree.implementing.nonEmpty()) {
986 chk.checkNonCyclic(tree.implementing.head.pos(),
987 ct.interfaces_field.head);
988 ct.interfaces_field = List.nil();
989 }
990 }
992 // Annotations.
993 // In general, we cannot fully process annotations yet, but we
994 // can attribute the annotation types and then check to see if the
995 // @Deprecated annotation is present.
996 attr.attribAnnotationTypes(tree.mods.annotations, baseEnv);
997 if (hasDeprecatedAnnotation(tree.mods.annotations))
998 c.flags_field |= DEPRECATED;
999 annotateLater(tree.mods.annotations, baseEnv, c);
1000 // class type parameters use baseEnv but everything uses env
1002 chk.checkNonCyclicDecl(tree);
1004 attr.attribTypeVariables(tree.typarams, baseEnv);
1005 // Do this here, where we have the symbol.
1006 for (JCTypeParameter tp : tree.typarams)
1007 typeAnnotate(tp, baseEnv, sym);
1008 annotate.flush();
1010 // Add default constructor if needed.
1011 if ((c.flags() & INTERFACE) == 0 &&
1012 !TreeInfo.hasConstructors(tree.defs)) {
1013 List<Type> argtypes = List.nil();
1014 List<Type> typarams = List.nil();
1015 List<Type> thrown = List.nil();
1016 long ctorFlags = 0;
1017 boolean based = false;
1018 boolean addConstructor = true;
1019 JCNewClass nc = null;
1020 if (c.name.isEmpty()) {
1021 nc = (JCNewClass)env.next.tree;
1022 if (nc.constructor != null) {
1023 addConstructor = nc.constructor.kind != ERR;
1024 Type superConstrType = types.memberType(c.type,
1025 nc.constructor);
1026 argtypes = superConstrType.getParameterTypes();
1027 typarams = superConstrType.getTypeArguments();
1028 ctorFlags = nc.constructor.flags() & VARARGS;
1029 if (nc.encl != null) {
1030 argtypes = argtypes.prepend(nc.encl.type);
1031 based = true;
1032 }
1033 thrown = superConstrType.getThrownTypes();
1034 }
1035 }
1036 if (addConstructor) {
1037 MethodSymbol basedConstructor = nc != null ?
1038 (MethodSymbol)nc.constructor : null;
1039 JCTree constrDef = DefaultConstructor(make.at(tree.pos), c,
1040 basedConstructor,
1041 typarams, argtypes, thrown,
1042 ctorFlags, based);
1043 tree.defs = tree.defs.prepend(constrDef);
1044 }
1045 }
1047 // enter symbols for 'this' into current scope.
1048 VarSymbol thisSym =
1049 new VarSymbol(FINAL | HASINIT, names._this, c.type, c);
1050 thisSym.pos = Position.FIRSTPOS;
1051 env.info.scope.enter(thisSym);
1052 // if this is a class, enter symbol for 'super' into current scope.
1053 if ((c.flags_field & INTERFACE) == 0 &&
1054 ct.supertype_field.hasTag(CLASS)) {
1055 VarSymbol superSym =
1056 new VarSymbol(FINAL | HASINIT, names._super,
1057 ct.supertype_field, c);
1058 superSym.pos = Position.FIRSTPOS;
1059 env.info.scope.enter(superSym);
1060 }
1062 // check that no package exists with same fully qualified name,
1063 // but admit classes in the unnamed package which have the same
1064 // name as a top-level package.
1065 if (checkClash &&
1066 c.owner.kind == PCK && c.owner != syms.unnamedPackage &&
1067 reader.packageExists(c.fullname)) {
1068 log.error(tree.pos, "clash.with.pkg.of.same.name", Kinds.kindName(sym), c);
1069 }
1070 if (c.owner.kind == PCK && (c.flags_field & PUBLIC) == 0 &&
1071 !env.toplevel.sourcefile.isNameCompatible(c.name.toString(),JavaFileObject.Kind.SOURCE)) {
1072 c.flags_field |= AUXILIARY;
1073 }
1074 } catch (CompletionFailure ex) {
1075 chk.completionError(tree.pos(), ex);
1076 } finally {
1077 log.useSource(prev);
1078 }
1080 // Enter all member fields and methods of a set of half completed
1081 // classes in a second phase.
1082 if (wasFirst) {
1083 try {
1084 while (halfcompleted.nonEmpty()) {
1085 finish(halfcompleted.next());
1086 }
1087 } finally {
1088 isFirst = true;
1089 }
1090 }
1091 if (allowTypeAnnos) {
1092 TypeAnnotations.organizeTypeAnnotationsSignatures(syms, names, log, tree, annotate);
1093 }
1094 }
1096 /*
1097 * If the symbol is non-null, attach the type annotation to it.
1098 */
1099 private void actualEnterTypeAnnotations(final List<JCAnnotation> annotations,
1100 final Env<AttrContext> env,
1101 final Symbol s) {
1102 Map<TypeSymbol, ListBuffer<Attribute.TypeCompound>> annotated =
1103 new LinkedHashMap<TypeSymbol, ListBuffer<Attribute.TypeCompound>>();
1104 Map<Attribute.TypeCompound, DiagnosticPosition> pos =
1105 new HashMap<Attribute.TypeCompound, DiagnosticPosition>();
1107 for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) {
1108 JCAnnotation a = al.head;
1109 Attribute.TypeCompound tc = annotate.enterTypeAnnotation(a,
1110 syms.annotationType,
1111 env);
1112 if (tc == null) {
1113 continue;
1114 }
1116 if (annotated.containsKey(a.type.tsym)) {
1117 if (source.allowRepeatedAnnotations()) {
1118 ListBuffer<Attribute.TypeCompound> l = annotated.get(a.type.tsym);
1119 l = l.append(tc);
1120 annotated.put(a.type.tsym, l);
1121 pos.put(tc, a.pos());
1122 } else {
1123 log.error(a.pos(), "duplicate.annotation");
1124 }
1125 } else {
1126 annotated.put(a.type.tsym, ListBuffer.of(tc));
1127 pos.put(tc, a.pos());
1128 }
1129 }
1131 if (s != null) {
1132 s.appendTypeAttributesWithCompletion(
1133 annotate.new AnnotateRepeatedContext<Attribute.TypeCompound>(env, annotated, pos, log, true));
1134 }
1135 }
1137 public void typeAnnotate(final JCTree tree, final Env<AttrContext> env, final Symbol sym) {
1138 if (allowTypeAnnos) {
1139 tree.accept(new TypeAnnotate(env, sym));
1140 }
1141 }
1143 /**
1144 * We need to use a TreeScanner, because it is not enough to visit the top-level
1145 * annotations. We also need to visit type arguments, etc.
1146 */
1147 private class TypeAnnotate extends TreeScanner {
1148 private Env<AttrContext> env;
1149 private Symbol sym;
1151 public TypeAnnotate(final Env<AttrContext> env, final Symbol sym) {
1152 this.env = env;
1153 this.sym = sym;
1154 }
1156 void annotateTypeLater(final List<JCAnnotation> annotations) {
1157 if (annotations.isEmpty()) {
1158 return;
1159 }
1161 annotate.normal(new Annotate.Annotator() {
1162 @Override
1163 public String toString() {
1164 return "type annotate " + annotations + " onto " + sym + " in " + sym.owner;
1165 }
1166 @Override
1167 public void enterAnnotation() {
1168 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
1169 try {
1170 actualEnterTypeAnnotations(annotations, env, sym);
1171 } finally {
1172 log.useSource(prev);
1173 }
1174 }
1175 });
1176 }
1178 @Override
1179 public void visitAnnotatedType(final JCAnnotatedType tree) {
1180 annotateTypeLater(tree.annotations);
1181 super.visitAnnotatedType(tree);
1182 }
1184 @Override
1185 public void visitTypeParameter(final JCTypeParameter tree) {
1186 annotateTypeLater(tree.annotations);
1187 super.visitTypeParameter(tree);
1188 }
1190 @Override
1191 public void visitNewArray(final JCNewArray tree) {
1192 annotateTypeLater(tree.annotations);
1193 for (List<JCAnnotation> dimAnnos : tree.dimAnnotations)
1194 annotateTypeLater(dimAnnos);
1195 super.visitNewArray(tree);
1196 }
1198 @Override
1199 public void visitMethodDef(final JCMethodDecl tree) {
1200 scan(tree.mods);
1201 scan(tree.restype);
1202 scan(tree.typarams);
1203 scan(tree.recvparam);
1204 scan(tree.params);
1205 scan(tree.thrown);
1206 scan(tree.defaultValue);
1207 // Do not annotate the body, just the signature.
1208 // scan(tree.body);
1209 }
1211 @Override
1212 public void visitVarDef(final JCVariableDecl tree) {
1213 if (sym != null && sym.kind == Kinds.VAR) {
1214 // Don't visit a parameter once when the sym is the method
1215 // and once when the sym is the parameter.
1216 scan(tree.mods);
1217 scan(tree.vartype);
1218 }
1219 scan(tree.init);
1220 }
1222 @Override
1223 public void visitClassDef(JCClassDecl tree) {
1224 // We can only hit a classdef if it is declared within
1225 // a method. Ignore it - the class will be visited
1226 // separately later.
1227 }
1229 @Override
1230 public void visitNewClass(JCNewClass tree) {
1231 if (tree.def == null) {
1232 // For an anonymous class instantiation the class
1233 // will be visited separately.
1234 super.visitNewClass(tree);
1235 }
1236 }
1237 }
1240 private Env<AttrContext> baseEnv(JCClassDecl tree, Env<AttrContext> env) {
1241 Scope baseScope = new Scope(tree.sym);
1242 //import already entered local classes into base scope
1243 for (Scope.Entry e = env.outer.info.scope.elems ; e != null ; e = e.sibling) {
1244 if (e.sym.isLocal()) {
1245 baseScope.enter(e.sym);
1246 }
1247 }
1248 //import current type-parameters into base scope
1249 if (tree.typarams != null)
1250 for (List<JCTypeParameter> typarams = tree.typarams;
1251 typarams.nonEmpty();
1252 typarams = typarams.tail)
1253 baseScope.enter(typarams.head.type.tsym);
1254 Env<AttrContext> outer = env.outer; // the base clause can't see members of this class
1255 Env<AttrContext> localEnv = outer.dup(tree, outer.info.dup(baseScope));
1256 localEnv.baseClause = true;
1257 localEnv.outer = outer;
1258 localEnv.info.isSelfCall = false;
1259 return localEnv;
1260 }
1262 /** Enter member fields and methods of a class
1263 * @param env the environment current for the class block.
1264 */
1265 private void finish(Env<AttrContext> env) {
1266 JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
1267 try {
1268 JCClassDecl tree = (JCClassDecl)env.tree;
1269 finishClass(tree, env);
1270 } finally {
1271 log.useSource(prev);
1272 }
1273 }
1275 /** Generate a base clause for an enum type.
1276 * @param pos The position for trees and diagnostics, if any
1277 * @param c The class symbol of the enum
1278 */
1279 private JCExpression enumBase(int pos, ClassSymbol c) {
1280 JCExpression result = make.at(pos).
1281 TypeApply(make.QualIdent(syms.enumSym),
1282 List.<JCExpression>of(make.Type(c.type)));
1283 return result;
1284 }
1286 Type modelMissingTypes(Type t, final JCExpression tree, final boolean interfaceExpected) {
1287 if (!t.hasTag(ERROR))
1288 return t;
1290 return new ErrorType(((ErrorType) t).getOriginalType(), t.tsym) {
1291 private Type modelType;
1293 @Override
1294 public Type getModelType() {
1295 if (modelType == null)
1296 modelType = new Synthesizer(getOriginalType(), interfaceExpected).visit(tree);
1297 return modelType;
1298 }
1299 };
1300 }
1301 // where
1302 private class Synthesizer extends JCTree.Visitor {
1303 Type originalType;
1304 boolean interfaceExpected;
1305 List<ClassSymbol> synthesizedSymbols = List.nil();
1306 Type result;
1308 Synthesizer(Type originalType, boolean interfaceExpected) {
1309 this.originalType = originalType;
1310 this.interfaceExpected = interfaceExpected;
1311 }
1313 Type visit(JCTree tree) {
1314 tree.accept(this);
1315 return result;
1316 }
1318 List<Type> visit(List<? extends JCTree> trees) {
1319 ListBuffer<Type> lb = new ListBuffer<Type>();
1320 for (JCTree t: trees)
1321 lb.append(visit(t));
1322 return lb.toList();
1323 }
1325 @Override
1326 public void visitTree(JCTree tree) {
1327 result = syms.errType;
1328 }
1330 @Override
1331 public void visitIdent(JCIdent tree) {
1332 if (!tree.type.hasTag(ERROR)) {
1333 result = tree.type;
1334 } else {
1335 result = synthesizeClass(tree.name, syms.unnamedPackage).type;
1336 }
1337 }
1339 @Override
1340 public void visitSelect(JCFieldAccess tree) {
1341 if (!tree.type.hasTag(ERROR)) {
1342 result = tree.type;
1343 } else {
1344 Type selectedType;
1345 boolean prev = interfaceExpected;
1346 try {
1347 interfaceExpected = false;
1348 selectedType = visit(tree.selected);
1349 } finally {
1350 interfaceExpected = prev;
1351 }
1352 ClassSymbol c = synthesizeClass(tree.name, selectedType.tsym);
1353 result = c.type;
1354 }
1355 }
1357 @Override
1358 public void visitTypeApply(JCTypeApply tree) {
1359 if (!tree.type.hasTag(ERROR)) {
1360 result = tree.type;
1361 } else {
1362 ClassType clazzType = (ClassType) visit(tree.clazz);
1363 if (synthesizedSymbols.contains(clazzType.tsym))
1364 synthesizeTyparams((ClassSymbol) clazzType.tsym, tree.arguments.size());
1365 final List<Type> actuals = visit(tree.arguments);
1366 result = new ErrorType(tree.type, clazzType.tsym) {
1367 @Override
1368 public List<Type> getTypeArguments() {
1369 return actuals;
1370 }
1371 };
1372 }
1373 }
1375 ClassSymbol synthesizeClass(Name name, Symbol owner) {
1376 int flags = interfaceExpected ? INTERFACE : 0;
1377 ClassSymbol c = new ClassSymbol(flags, name, owner);
1378 c.members_field = new Scope.ErrorScope(c);
1379 c.type = new ErrorType(originalType, c) {
1380 @Override
1381 public List<Type> getTypeArguments() {
1382 return typarams_field;
1383 }
1384 };
1385 synthesizedSymbols = synthesizedSymbols.prepend(c);
1386 return c;
1387 }
1389 void synthesizeTyparams(ClassSymbol sym, int n) {
1390 ClassType ct = (ClassType) sym.type;
1391 Assert.check(ct.typarams_field.isEmpty());
1392 if (n == 1) {
1393 TypeVar v = new TypeVar(names.fromString("T"), sym, syms.botType);
1394 ct.typarams_field = ct.typarams_field.prepend(v);
1395 } else {
1396 for (int i = n; i > 0; i--) {
1397 TypeVar v = new TypeVar(names.fromString("T" + i), sym, syms.botType);
1398 ct.typarams_field = ct.typarams_field.prepend(v);
1399 }
1400 }
1401 }
1402 }
1405 /* ***************************************************************************
1406 * tree building
1407 ****************************************************************************/
1409 /** Generate default constructor for given class. For classes different
1410 * from java.lang.Object, this is:
1411 *
1412 * c(argtype_0 x_0, ..., argtype_n x_n) throws thrown {
1413 * super(x_0, ..., x_n)
1414 * }
1415 *
1416 * or, if based == true:
1417 *
1418 * c(argtype_0 x_0, ..., argtype_n x_n) throws thrown {
1419 * x_0.super(x_1, ..., x_n)
1420 * }
1421 *
1422 * @param make The tree factory.
1423 * @param c The class owning the default constructor.
1424 * @param argtypes The parameter types of the constructor.
1425 * @param thrown The thrown exceptions of the constructor.
1426 * @param based Is first parameter a this$n?
1427 */
1428 JCTree DefaultConstructor(TreeMaker make,
1429 ClassSymbol c,
1430 MethodSymbol baseInit,
1431 List<Type> typarams,
1432 List<Type> argtypes,
1433 List<Type> thrown,
1434 long flags,
1435 boolean based) {
1436 JCTree result;
1437 if ((c.flags() & ENUM) != 0 &&
1438 (types.supertype(c.type).tsym == syms.enumSym)) {
1439 // constructors of true enums are private
1440 flags = (flags & ~AccessFlags) | PRIVATE | GENERATEDCONSTR;
1441 } else
1442 flags |= (c.flags() & AccessFlags) | GENERATEDCONSTR;
1443 if (c.name.isEmpty()) {
1444 flags |= ANONCONSTR;
1445 }
1446 Type mType = new MethodType(argtypes, null, thrown, c);
1447 Type initType = typarams.nonEmpty() ?
1448 new ForAll(typarams, mType) :
1449 mType;
1450 MethodSymbol init = new MethodSymbol(flags, names.init,
1451 initType, c);
1452 init.params = createDefaultConstructorParams(make, baseInit, init,
1453 argtypes, based);
1454 List<JCVariableDecl> params = make.Params(argtypes, init);
1455 List<JCStatement> stats = List.nil();
1456 if (c.type != syms.objectType) {
1457 stats = stats.prepend(SuperCall(make, typarams, params, based));
1458 }
1459 result = make.MethodDef(init, make.Block(0, stats));
1460 return result;
1461 }
1463 private List<VarSymbol> createDefaultConstructorParams(
1464 TreeMaker make,
1465 MethodSymbol baseInit,
1466 MethodSymbol init,
1467 List<Type> argtypes,
1468 boolean based) {
1469 List<VarSymbol> initParams = null;
1470 List<Type> argTypesList = argtypes;
1471 if (based) {
1472 /* In this case argtypes will have an extra type, compared to baseInit,
1473 * corresponding to the type of the enclosing instance i.e.:
1474 *
1475 * Inner i = outer.new Inner(1){}
1476 *
1477 * in the above example argtypes will be (Outer, int) and baseInit
1478 * will have parameter's types (int). So in this case we have to add
1479 * first the extra type in argtypes and then get the names of the
1480 * parameters from baseInit.
1481 */
1482 initParams = List.nil();
1483 VarSymbol param = new VarSymbol(0, make.paramName(0), argtypes.head, init);
1484 initParams = initParams.append(param);
1485 argTypesList = argTypesList.tail;
1486 }
1487 if (baseInit != null && baseInit.params != null &&
1488 baseInit.params.nonEmpty() && argTypesList.nonEmpty()) {
1489 initParams = (initParams == null) ? List.<VarSymbol>nil() : initParams;
1490 List<VarSymbol> baseInitParams = baseInit.params;
1491 while (baseInitParams.nonEmpty() && argTypesList.nonEmpty()) {
1492 VarSymbol param = new VarSymbol(baseInitParams.head.flags(),
1493 baseInitParams.head.name, argTypesList.head, init);
1494 initParams = initParams.append(param);
1495 baseInitParams = baseInitParams.tail;
1496 argTypesList = argTypesList.tail;
1497 }
1498 }
1499 return initParams;
1500 }
1502 /** Generate call to superclass constructor. This is:
1503 *
1504 * super(id_0, ..., id_n)
1505 *
1506 * or, if based == true
1507 *
1508 * id_0.super(id_1,...,id_n)
1509 *
1510 * where id_0, ..., id_n are the names of the given parameters.
1511 *
1512 * @param make The tree factory
1513 * @param params The parameters that need to be passed to super
1514 * @param typarams The type parameters that need to be passed to super
1515 * @param based Is first parameter a this$n?
1516 */
1517 JCExpressionStatement SuperCall(TreeMaker make,
1518 List<Type> typarams,
1519 List<JCVariableDecl> params,
1520 boolean based) {
1521 JCExpression meth;
1522 if (based) {
1523 meth = make.Select(make.Ident(params.head), names._super);
1524 params = params.tail;
1525 } else {
1526 meth = make.Ident(names._super);
1527 }
1528 List<JCExpression> typeargs = typarams.nonEmpty() ? make.Types(typarams) : null;
1529 return make.Exec(make.Apply(typeargs, meth, make.Idents(params)));
1530 }
1531 }
