1 /*
2 * Copyright (c) 1999, 2015, 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 */
25
26 package com.sun.tools.javac.code;
27
28 import java.util.HashMap;
29 import java.util.HashSet;
30 import java.util.Map;
31 import java.util.Set;
32
33 import javax.lang.model.element.ElementVisitor;
34 import javax.tools.JavaFileObject;
35
36
37 import com.sun.tools.javac.code.Scope.WriteableScope;
38 import com.sun.tools.javac.code.Symbol.ClassSymbol;
39 import com.sun.tools.javac.code.Symbol.Completer;
40 import com.sun.tools.javac.code.Symbol.CompletionFailure;
41 import com.sun.tools.javac.code.Symbol.MethodSymbol;
42 import com.sun.tools.javac.code.Symbol.OperatorSymbol;
43 import com.sun.tools.javac.code.Symbol.PackageSymbol;
44 import com.sun.tools.javac.code.Symbol.TypeSymbol;
45 import com.sun.tools.javac.code.Symbol.VarSymbol;
46 import com.sun.tools.javac.code.Type.BottomType;
47 import com.sun.tools.javac.code.Type.ClassType;
48 import com.sun.tools.javac.code.Type.ErrorType;
49 import com.sun.tools.javac.code.Type.JCPrimitiveType;
50 import com.sun.tools.javac.code.Type.JCVoidType;
51 import com.sun.tools.javac.code.Type.MethodType;
52 import com.sun.tools.javac.code.Type.UnknownType;
53 import com.sun.tools.javac.jvm.ByteCodes;
54 import com.sun.tools.javac.jvm.Target;
55 import com.sun.tools.javac.util.Assert;
56 import com.sun.tools.javac.util.Context;
57 import com.sun.tools.javac.util.Convert;
58 import com.sun.tools.javac.util.DefinedBy;
59 import com.sun.tools.javac.util.DefinedBy.Api;
60 import com.sun.tools.javac.util.JavacMessages;
61 import com.sun.tools.javac.util.List;
62 import com.sun.tools.javac.util.Log;
63 import com.sun.tools.javac.util.Name;
64 import com.sun.tools.javac.util.Names;
65
66 import static com.sun.tools.javac.code.Flags.*;
67 import static com.sun.tools.javac.code.Kinds.Kind.*;
68 import static com.sun.tools.javac.jvm.ByteCodes.*;
69 import static com.sun.tools.javac.code.TypeTag.*;
70
71 /** A class that defines all predefined constants and operators
72 * as well as special classes such as java.lang.Object, which need
73 * to be known to the compiler. All symbols are held in instance
74 * fields. This makes it possible to work in multiple concurrent
75 * projects, which might use different class files for library classes.
76 *
77 * <p><b>This is NOT part of any supported API.
78 * If you write code that depends on this, you do so at your own risk.
79 * This code and its internal interfaces are subject to change or
80 * deletion without notice.</b>
81 */
82 public class Symtab {
83 /** The context key for the symbol table. */
84 protected static final Context.Key<Symtab> symtabKey = new Context.Key<>();
85
86 /** Get the symbol table instance. */
87 public static Symtab instance(Context context) {
88 Symtab instance = context.get(symtabKey);
89 if (instance == null)
90 instance = new Symtab(context);
91 return instance;
92 }
93
94 /** Builtin types.
95 */
96 public final JCPrimitiveType byteType = new JCPrimitiveType(BYTE, null);
97 public final JCPrimitiveType charType = new JCPrimitiveType(CHAR, null);
98 public final JCPrimitiveType shortType = new JCPrimitiveType(SHORT, null);
99 public final JCPrimitiveType intType = new JCPrimitiveType(INT, null);
100 public final JCPrimitiveType longType = new JCPrimitiveType(LONG, null);
101 public final JCPrimitiveType floatType = new JCPrimitiveType(FLOAT, null);
102 public final JCPrimitiveType doubleType = new JCPrimitiveType(DOUBLE, null);
103 public final JCPrimitiveType booleanType = new JCPrimitiveType(BOOLEAN, null);
104 public final Type botType = new BottomType();
105 public final JCVoidType voidType = new JCVoidType();
106
107 private final Names names;
108 private final Completer initialCompleter;
109 private final Target target;
110
111 /** A symbol for the root package.
112 */
113 public final PackageSymbol rootPackage;
114
115 /** A symbol for the unnamed package.
116 */
117 public final PackageSymbol unnamedPackage;
118
119 /** A symbol that stands for a missing symbol.
120 */
121 public final TypeSymbol noSymbol;
122
123 /** The error symbol.
124 */
125 public final ClassSymbol errSymbol;
126
127 /** The unknown symbol.
128 */
129 public final ClassSymbol unknownSymbol;
130
131 /** A value for the errType, with a originalType of noType */
132 public final Type errType;
133
134 /** A value for the unknown type. */
135 public final Type unknownType;
136
137 /** The builtin type of all arrays. */
138 public final ClassSymbol arrayClass;
139 public final MethodSymbol arrayCloneMethod;
140
141 /** VGJ: The (singleton) type of all bound types. */
142 public final ClassSymbol boundClass;
143
144 /** The builtin type of all methods. */
145 public final ClassSymbol methodClass;
146
147 /** Predefined types.
148 */
149 public final Type objectType;
150 public final Type objectsType;
151 public final Type classType;
152 public final Type classLoaderType;
153 public final Type stringType;
154 public final Type stringBufferType;
155 public final Type stringBuilderType;
156 public final Type cloneableType;
157 public final Type serializableType;
158 public final Type serializedLambdaType;
159 public final Type methodHandleType;
160 public final Type methodHandleLookupType;
161 public final Type methodTypeType;
162 public final Type nativeHeaderType;
163 public final Type throwableType;
164 public final Type errorType;
165 public final Type interruptedExceptionType;
166 public final Type illegalArgumentExceptionType;
167 public final Type exceptionType;
168 public final Type runtimeExceptionType;
169 public final Type classNotFoundExceptionType;
170 public final Type noClassDefFoundErrorType;
171 public final Type noSuchFieldErrorType;
172 public final Type assertionErrorType;
173 public final Type cloneNotSupportedExceptionType;
174 public final Type annotationType;
175 public final TypeSymbol enumSym;
176 public final Type listType;
177 public final Type collectionsType;
178 public final Type comparableType;
179 public final Type comparatorType;
180 public final Type arraysType;
181 public final Type iterableType;
182 public final Type iteratorType;
183 public final Type annotationTargetType;
184 public final Type overrideType;
185 public final Type retentionType;
186 public final Type deprecatedType;
187 public final Type suppressWarningsType;
188 public final Type supplierType;
189 public final Type inheritedType;
190 public final Type profileType;
191 public final Type proprietaryType;
192 public final Type systemType;
193 public final Type autoCloseableType;
194 public final Type trustMeType;
195 public final Type lambdaMetafactory;
196 public final Type repeatableType;
197 public final Type documentedType;
198 public final Type elementTypeType;
199 public final Type functionalInterfaceType;
200
201 /** The symbol representing the length field of an array.
202 */
203 public final VarSymbol lengthVar;
204
205 /** The symbol representing the final finalize method on enums */
206 public final MethodSymbol enumFinalFinalize;
207
208 /** The symbol representing the close method on TWR AutoCloseable type */
209 public final MethodSymbol autoCloseableClose;
210
211 /** The predefined type that belongs to a tag.
212 */
213 public final Type[] typeOfTag = new Type[TypeTag.getTypeTagCount()];
214
215 /** The name of the class that belongs to a basix type tag.
216 */
217 public final Name[] boxedName = new Name[TypeTag.getTypeTagCount()];
218
219 /** A hashtable containing the encountered top-level and member classes,
220 * indexed by flat names. The table does not contain local classes.
221 * It should be updated from the outside to reflect classes defined
222 * by compiled source files.
223 */
224 public final Map<Name, ClassSymbol> classes = new HashMap<>();
225
226 /** A hashtable containing the encountered packages.
227 * the table should be updated from outside to reflect packages defined
228 * by compiled source files.
229 */
230 public final Map<Name, PackageSymbol> packages = new HashMap<>();
231
232 public void initType(Type type, ClassSymbol c) {
233 type.tsym = c;
234 typeOfTag[type.getTag().ordinal()] = type;
235 }
236
237 public void initType(Type type, String name) {
238 initType(
239 type,
240 new ClassSymbol(
241 PUBLIC, names.fromString(name), type, rootPackage));
242 }
243
244 public void initType(Type type, String name, String bname) {
245 initType(type, name);
246 boxedName[type.getTag().ordinal()] = names.fromString("java.lang." + bname);
247 }
248
249 /** The class symbol that owns all predefined symbols.
250 */
251 public final ClassSymbol predefClass;
252
253 /** Enter a class into symbol table.
254 * @param s The name of the class.
255 */
256 private Type enterClass(String s) {
257 return enterClass(names.fromString(s)).type;
258 }
259
260 public void synthesizeEmptyInterfaceIfMissing(final Type type) {
261 final Completer completer = type.tsym.completer;
262 type.tsym.completer = new Completer() {
263 public void complete(Symbol sym) throws CompletionFailure {
264 try {
265 completer.complete(sym);
266 } catch (CompletionFailure e) {
267 sym.flags_field |= (PUBLIC | INTERFACE);
268 ((ClassType) sym.type).supertype_field = objectType;
269 }
270 }
271
272 @Override
273 public boolean isTerminal() {
274 return completer.isTerminal();
275 }
276 };
277 }
278
279 public void synthesizeBoxTypeIfMissing(final Type type) {
280 ClassSymbol sym = enterClass(boxedName[type.getTag().ordinal()]);
281 final Completer completer = sym.completer;
282 sym.completer = new Completer() {
283 public void complete(Symbol sym) throws CompletionFailure {
284 try {
285 completer.complete(sym);
286 } catch (CompletionFailure e) {
287 sym.flags_field |= PUBLIC;
288 ((ClassType) sym.type).supertype_field = objectType;
289 MethodSymbol boxMethod =
290 new MethodSymbol(PUBLIC | STATIC, names.valueOf,
291 new MethodType(List.of(type), sym.type,
292 List.<Type>nil(), methodClass),
293 sym);
294 sym.members().enter(boxMethod);
295 MethodSymbol unboxMethod =
296 new MethodSymbol(PUBLIC,
297 type.tsym.name.append(names.Value), // x.intValue()
298 new MethodType(List.<Type>nil(), type,
299 List.<Type>nil(), methodClass),
300 sym);
301 sym.members().enter(unboxMethod);
302 }
303 }
304
305 @Override
306 public boolean isTerminal() {
307 return completer.isTerminal();
308 }
309 };
310 }
311
312 // Enter a synthetic class that is used to mark classes in ct.sym.
313 // This class does not have a class file.
314 private Type enterSyntheticAnnotation(String name) {
315 ClassType type = (ClassType)enterClass(name);
316 ClassSymbol sym = (ClassSymbol)type.tsym;
317 sym.completer = Completer.NULL_COMPLETER;
318 sym.flags_field = PUBLIC|ACYCLIC|ANNOTATION|INTERFACE;
319 sym.erasure_field = type;
320 sym.members_field = WriteableScope.create(sym);
321 type.typarams_field = List.nil();
322 type.allparams_field = List.nil();
323 type.supertype_field = annotationType;
324 type.interfaces_field = List.nil();
325 return type;
326 }
327
328 /** Constructor; enters all predefined identifiers and operators
329 * into symbol table.
330 */
331 protected Symtab(Context context) throws CompletionFailure {
332 context.put(symtabKey, this);
333
334 names = Names.instance(context);
335 target = Target.instance(context);
336
337 // Create the unknown type
338 unknownType = new UnknownType();
339
340 // create the basic builtin symbols
341 rootPackage = new PackageSymbol(names.empty, null);
342 packages.put(names.empty, rootPackage);
343 final JavacMessages messages = JavacMessages.instance(context);
344 unnamedPackage = new PackageSymbol(names.empty, rootPackage) {
345 public String toString() {
346 return messages.getLocalizedString("compiler.misc.unnamed.package");
347 }
348 };
349 noSymbol = new TypeSymbol(NIL, 0, names.empty, Type.noType, rootPackage) {
350 @DefinedBy(Api.LANGUAGE_MODEL)
351 public <R, P> R accept(ElementVisitor<R, P> v, P p) {
352 return v.visitUnknown(this, p);
353 }
354 };
355
356 // create the error symbols
357 errSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.any, null, rootPackage);
358 errType = new ErrorType(errSymbol, Type.noType);
359
360 unknownSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.fromString("<any?>"), null, rootPackage);
361 unknownSymbol.members_field = new Scope.ErrorScope(unknownSymbol);
362 unknownSymbol.type = unknownType;
363
364 // initialize builtin types
365 initType(byteType, "byte", "Byte");
366 initType(shortType, "short", "Short");
367 initType(charType, "char", "Character");
368 initType(intType, "int", "Integer");
369 initType(longType, "long", "Long");
370 initType(floatType, "float", "Float");
371 initType(doubleType, "double", "Double");
372 initType(booleanType, "boolean", "Boolean");
373 initType(voidType, "void", "Void");
374 initType(botType, "<nulltype>");
375 initType(errType, errSymbol);
376 initType(unknownType, unknownSymbol);
377
378 // the builtin class of all arrays
379 arrayClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Array, noSymbol);
380
381 // VGJ
382 boundClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Bound, noSymbol);
383 boundClass.members_field = new Scope.ErrorScope(boundClass);
384
385 // the builtin class of all methods
386 methodClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Method, noSymbol);
387 methodClass.members_field = new Scope.ErrorScope(boundClass);
388
389 // Create class to hold all predefined constants and operations.
390 predefClass = new ClassSymbol(PUBLIC|ACYCLIC, names.empty, rootPackage);
391 WriteableScope scope = WriteableScope.create(predefClass);
392 predefClass.members_field = scope;
393
394 // Get the initial completer for Symbols from the ClassFinder
395 initialCompleter = ClassFinder.instance(context).getCompleter();
396 rootPackage.completer = initialCompleter;
397 unnamedPackage.completer = initialCompleter;
398
399 // Enter symbols for basic types.
400 scope.enter(byteType.tsym);
401 scope.enter(shortType.tsym);
402 scope.enter(charType.tsym);
403 scope.enter(intType.tsym);
404 scope.enter(longType.tsym);
405 scope.enter(floatType.tsym);
406 scope.enter(doubleType.tsym);
407 scope.enter(booleanType.tsym);
408 scope.enter(errType.tsym);
409
410 // Enter symbol for the errSymbol
411 scope.enter(errSymbol);
412
413 classes.put(predefClass.fullname, predefClass);
414
415 // Enter predefined classes.
416 objectType = enterClass("java.lang.Object");
417 objectsType = enterClass("java.util.Objects");
418 classType = enterClass("java.lang.Class");
419 stringType = enterClass("java.lang.String");
420 stringBufferType = enterClass("java.lang.StringBuffer");
421 stringBuilderType = enterClass("java.lang.StringBuilder");
422 cloneableType = enterClass("java.lang.Cloneable");
423 throwableType = enterClass("java.lang.Throwable");
424 serializableType = enterClass("java.io.Serializable");
425 serializedLambdaType = enterClass("java.lang.invoke.SerializedLambda");
426 methodHandleType = enterClass("java.lang.invoke.MethodHandle");
427 methodHandleLookupType = enterClass("java.lang.invoke.MethodHandles$Lookup");
428 methodTypeType = enterClass("java.lang.invoke.MethodType");
429 errorType = enterClass("java.lang.Error");
430 illegalArgumentExceptionType = enterClass("java.lang.IllegalArgumentException");
431 interruptedExceptionType = enterClass("java.lang.InterruptedException");
432 exceptionType = enterClass("java.lang.Exception");
433 runtimeExceptionType = enterClass("java.lang.RuntimeException");
434 classNotFoundExceptionType = enterClass("java.lang.ClassNotFoundException");
435 noClassDefFoundErrorType = enterClass("java.lang.NoClassDefFoundError");
436 noSuchFieldErrorType = enterClass("java.lang.NoSuchFieldError");
437 assertionErrorType = enterClass("java.lang.AssertionError");
438 cloneNotSupportedExceptionType = enterClass("java.lang.CloneNotSupportedException");
439 annotationType = enterClass("java.lang.annotation.Annotation");
440 classLoaderType = enterClass("java.lang.ClassLoader");
441 enumSym = enterClass(names.java_lang_Enum);
442 enumFinalFinalize =
443 new MethodSymbol(PROTECTED|FINAL|HYPOTHETICAL,
444 names.finalize,
445 new MethodType(List.<Type>nil(), voidType,
446 List.<Type>nil(), methodClass),
447 enumSym);
448 listType = enterClass("java.util.List");
449 collectionsType = enterClass("java.util.Collections");
450 comparableType = enterClass("java.lang.Comparable");
451 comparatorType = enterClass("java.util.Comparator");
452 arraysType = enterClass("java.util.Arrays");
453 iterableType = enterClass("java.lang.Iterable");
454 iteratorType = enterClass("java.util.Iterator");
455 annotationTargetType = enterClass("java.lang.annotation.Target");
456 overrideType = enterClass("java.lang.Override");
457 retentionType = enterClass("java.lang.annotation.Retention");
458 deprecatedType = enterClass("java.lang.Deprecated");
459 suppressWarningsType = enterClass("java.lang.SuppressWarnings");
460 supplierType = enterClass("java.util.function.Supplier");
461 inheritedType = enterClass("java.lang.annotation.Inherited");
462 repeatableType = enterClass("java.lang.annotation.Repeatable");
463 documentedType = enterClass("java.lang.annotation.Documented");
464 elementTypeType = enterClass("java.lang.annotation.ElementType");
465 systemType = enterClass("java.lang.System");
466 autoCloseableType = enterClass("java.lang.AutoCloseable");
467 autoCloseableClose = new MethodSymbol(PUBLIC,
468 names.close,
469 new MethodType(List.<Type>nil(), voidType,
470 List.of(exceptionType), methodClass),
471 autoCloseableType.tsym);
472 trustMeType = enterClass("java.lang.SafeVarargs");
473 nativeHeaderType = enterClass("java.lang.annotation.Native");
474 lambdaMetafactory = enterClass("java.lang.invoke.LambdaMetafactory");
475 functionalInterfaceType = enterClass("java.lang.FunctionalInterface");
476
477 synthesizeEmptyInterfaceIfMissing(autoCloseableType);
478 synthesizeEmptyInterfaceIfMissing(cloneableType);
479 synthesizeEmptyInterfaceIfMissing(serializableType);
480 synthesizeEmptyInterfaceIfMissing(lambdaMetafactory);
481 synthesizeEmptyInterfaceIfMissing(serializedLambdaType);
482 synthesizeBoxTypeIfMissing(doubleType);
483 synthesizeBoxTypeIfMissing(floatType);
484 synthesizeBoxTypeIfMissing(voidType);
485
486 // Enter a synthetic class that is used to mark internal
487 // proprietary classes in ct.sym. This class does not have a
488 // class file.
489 proprietaryType = enterSyntheticAnnotation("sun.Proprietary+Annotation");
490
491 // Enter a synthetic class that is used to provide profile info for
492 // classes in ct.sym. This class does not have a class file.
493 profileType = enterSyntheticAnnotation("jdk.Profile+Annotation");
494 MethodSymbol m = new MethodSymbol(PUBLIC | ABSTRACT, names.value, intType, profileType.tsym);
495 profileType.tsym.members().enter(m);
496
497 // Enter a class for arrays.
498 // The class implements java.lang.Cloneable and java.io.Serializable.
499 // It has a final length field and a clone method.
500 ClassType arrayClassType = (ClassType)arrayClass.type;
501 arrayClassType.supertype_field = objectType;
502 arrayClassType.interfaces_field = List.of(cloneableType, serializableType);
503 arrayClass.members_field = WriteableScope.create(arrayClass);
504 lengthVar = new VarSymbol(
505 PUBLIC | FINAL,
506 names.length,
507 intType,
508 arrayClass);
509 arrayClass.members().enter(lengthVar);
510 arrayCloneMethod = new MethodSymbol(
511 PUBLIC,
512 names.clone,
513 new MethodType(List.<Type>nil(), objectType,
514 List.<Type>nil(), methodClass),
515 arrayClass);
516 arrayClass.members().enter(arrayCloneMethod);
517 }
518
519 /** Define a new class given its name and owner.
520 */
521 public ClassSymbol defineClass(Name name, Symbol owner) {
522 ClassSymbol c = new ClassSymbol(0, name, owner);
523 if (owner.kind == PCK)
524 Assert.checkNull(classes.get(c.flatname), c);
525 c.completer = initialCompleter;
526 return c;
527 }
528
529 /** Create a new toplevel or member class symbol with given name
530 * and owner and enter in `classes' unless already there.
531 */
532 public ClassSymbol enterClass(Name name, TypeSymbol owner) {
533 Name flatname = TypeSymbol.formFlatName(name, owner);
534 ClassSymbol c = classes.get(flatname);
535 if (c == null) {
536 c = defineClass(name, owner);
537 classes.put(flatname, c);
538 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) {
539 // reassign fields of classes that might have been loaded with
540 // their flat names.
541 c.owner.members().remove(c);
542 c.name = name;
543 c.owner = owner;
544 c.fullname = ClassSymbol.formFullName(name, owner);
545 }
546 return c;
547 }
548
549 /**
550 * Creates a new toplevel class symbol with given flat name and
551 * given class (or source) file.
552 *
553 * @param flatName a fully qualified binary class name
554 * @param classFile the class file or compilation unit defining
555 * the class (may be {@code null})
556 * @return a newly created class symbol
557 * @throws AssertionError if the class symbol already exists
558 */
559 public ClassSymbol enterClass(Name flatName, JavaFileObject classFile) {
560 ClassSymbol cs = classes.get(flatName);
561 if (cs != null) {
562 String msg = Log.format("%s: completer = %s; class file = %s; source file = %s",
563 cs.fullname,
564 cs.completer,
565 cs.classfile,
566 cs.sourcefile);
567 throw new AssertionError(msg);
568 }
569 Name packageName = Convert.packagePart(flatName);
570 PackageSymbol owner = packageName.isEmpty()
571 ? unnamedPackage
572 : enterPackage(packageName);
573 cs = defineClass(Convert.shortName(flatName), owner);
574 cs.classfile = classFile;
575 classes.put(flatName, cs);
576 return cs;
577 }
578
579 /** Create a new member or toplevel class symbol with given flat name
580 * and enter in `classes' unless already there.
581 */
582 public ClassSymbol enterClass(Name flatname) {
583 ClassSymbol c = classes.get(flatname);
584 if (c == null)
585 return enterClass(flatname, (JavaFileObject)null);
586 else
587 return c;
588 }
589
590 /** Check to see if a package exists, given its fully qualified name.
591 */
592 public boolean packageExists(Name fullname) {
593 return enterPackage(fullname).exists();
594 }
595
596 /** Make a package, given its fully qualified name.
597 */
598 public PackageSymbol enterPackage(Name fullname) {
599 PackageSymbol p = packages.get(fullname);
600 if (p == null) {
601 Assert.check(!fullname.isEmpty(), "rootPackage missing!");
602 p = new PackageSymbol(
603 Convert.shortName(fullname),
604 enterPackage(Convert.packagePart(fullname)));
605 p.completer = initialCompleter;
606 packages.put(fullname, p);
607 }
608 return p;
609 }
610
611 /** Make a package, given its unqualified name and enclosing package.
612 */
613 public PackageSymbol enterPackage(Name name, PackageSymbol owner) {
614 return enterPackage(TypeSymbol.formFullName(name, owner));
615 }
616 }