1 /*
2 * Copyright (c) 1999, 2025, 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.lang.annotation.Retention;
29 import java.lang.annotation.RetentionPolicy;
30 import java.util.Collections;
31 import java.util.EnumSet;
32 import java.util.Map;
33 import java.util.Set;
34 import java.util.concurrent.ConcurrentHashMap;
35 import java.util.stream.Collectors;
36
37 import javax.lang.model.element.Modifier;
38
39 import com.sun.tools.javac.util.Assert;
40
41 /** Access flags and other modifiers for Java classes and members.
42 *
43 * <p><b>This is NOT part of any supported API.
44 * If you write code that depends on this, you do so at your own risk.
45 * This code and its internal interfaces are subject to change or
46 * deletion without notice.</b>
47 */
48 public class Flags {
49
50 private Flags() {} // uninstantiable
51
52 public static String toString(long flags) {
53 StringBuilder buf = new StringBuilder();
54 String sep = "";
55 for (FlagsEnum flag : asFlagSet(flags)) {
56 buf.append(sep);
57 buf.append(flag);
58 sep = " ";
59 }
60 return buf.toString();
61 }
62
63 public static EnumSet<FlagsEnum> asFlagSet(long flags) {
64 EnumSet<FlagsEnum> flagSet = EnumSet.noneOf(FlagsEnum.class);
65 for (FlagsEnum flag : FlagsEnum.values()) {
66 if ((flags & flag.value()) != 0) {
67 flagSet.add(flag);
68 flags &= ~flag.value();
69 }
70 }
71 Assert.check(flags == 0);
72 return flagSet;
73 }
74
75 /* Standard Java flags.
76 */
77 @Use({FlagTarget.CLASS, FlagTarget.METHOD, FlagTarget.VARIABLE})
78 public static final int PUBLIC = 1;
79 @Use({FlagTarget.CLASS, FlagTarget.METHOD, FlagTarget.VARIABLE})
80 public static final int PRIVATE = 1<<1;
81 @Use({FlagTarget.CLASS, FlagTarget.METHOD, FlagTarget.VARIABLE})
82 public static final int PROTECTED = 1<<2;
83 @Use({FlagTarget.BLOCK, FlagTarget.CLASS, FlagTarget.METHOD, FlagTarget.VARIABLE})
84 public static final int STATIC = 1<<3;
85 @Use({FlagTarget.CLASS, FlagTarget.METHOD, FlagTarget.VARIABLE})
86 public static final int FINAL = 1<<4;
87 @Use({FlagTarget.METHOD})
88 public static final int SYNCHRONIZED = 1<<5;
89 @Use({FlagTarget.VARIABLE})
90 public static final int VOLATILE = 1<<6;
91 @Use({FlagTarget.VARIABLE})
92 public static final int TRANSIENT = 1<<7;
93 @Use({FlagTarget.METHOD})
94 public static final int NATIVE = 1<<8;
95 @Use({FlagTarget.CLASS})
96 public static final int INTERFACE = 1<<9;
97 @Use({FlagTarget.CLASS, FlagTarget.METHOD})
98 public static final int ABSTRACT = 1<<10;
99 @Use({FlagTarget.CLASS, FlagTarget.METHOD})
100 public static final int STRICTFP = 1<<11;
101
102 /* Flag that marks a symbol synthetic, added in classfile v49.0. */
103 @Use({FlagTarget.CLASS, FlagTarget.METHOD, FlagTarget.VARIABLE})
104 public static final int SYNTHETIC = 1<<12;
105
106 /** Flag that marks attribute interfaces, added in classfile v49.0. */
107 @Use({FlagTarget.CLASS})
108 public static final int ANNOTATION = 1<<13;
109
110 /** An enumeration type or an enumeration constant, added in
111 * classfile v49.0. */
112 @Use({FlagTarget.CLASS, FlagTarget.VARIABLE})
113 public static final int ENUM = 1<<14;
114
115 /** Added in SE8, represents constructs implicitly declared in source. */
116 @Use({FlagTarget.MODULE, FlagTarget.VARIABLE})
117 public static final int MANDATED = 1<<15;
118
119 @NotFlag
120 public static final int StandardFlags = 0x0fff;
121
122 // Because the following access flags are overloaded with other
123 // bit positions, we translate them when reading and writing class
124 // files into unique bits positions: ACC_SYNTHETIC <-> SYNTHETIC,
125 // for example.
126 @Use({FlagTarget.CLASS})
127 @NoToStringValue
128 public static final int ACC_SUPER = 1<<5;
129 @Use({FlagTarget.METHOD})
130 @NoToStringValue
131 public static final int ACC_BRIDGE = 1<<6;
132 @Use({FlagTarget.METHOD})
133 @NoToStringValue
134 public static final int ACC_VARARGS = 1<<7;
135 @Use({FlagTarget.CLASS})
136 @NoToStringValue
137 public static final int ACC_MODULE = 1<<15;
138
139 /* ***************************************
140 * Internal compiler flags (no bits in the lower 16).
141 *****************************************/
142
143 /** Flag is set if symbol is deprecated. See also DEPRECATED_REMOVAL.
144 */
145 @Use({FlagTarget.CLASS, FlagTarget.METHOD, FlagTarget.MODULE, FlagTarget.PACKAGE, FlagTarget.TYPE_VAR, FlagTarget.VARIABLE})
146 public static final int DEPRECATED = 1<<17;
147
148 /** Flag is set for a variable symbol if the variable's definition
149 * has an initializer part.
150 */
151 @Use({FlagTarget.VARIABLE})
152 public static final int HASINIT = 1<<18;
153
154 /** Class is an implicitly declared top level class.
155 */
156 @Use({FlagTarget.CLASS})
157 public static final int IMPLICIT_CLASS = 1<<19;
158
159 /** Flag is set for compiler-generated anonymous method symbols
160 * that `own' an initializer block.
161 */
162 @Use({FlagTarget.METHOD})
163 public static final int BLOCK = 1<<20;
164
165 /** Flag is set for ClassSymbols that are being compiled from source.
166 */
167 @Use({FlagTarget.CLASS})
168 public static final int FROM_SOURCE = 1<<21;
169
170 /** Flag is set for nested classes that do not access instance members
171 * or `this' of an outer class and therefore don't need to be passed
172 * a this$n reference. This value is currently set only for anonymous
173 * classes in superclass constructor calls.
174 * todo: use this value for optimizing away this$n parameters in
175 * other cases.
176 */
177 @Use({FlagTarget.CLASS, FlagTarget.VARIABLE})
178 public static final int NOOUTERTHIS = 1<<22;
179
180 /** Flag is set for package symbols if a package has a member or
181 * directory and therefore exists.
182 */
183 @Use({FlagTarget.CLASS, FlagTarget.PACKAGE})
184 public static final int EXISTS = 1<<23;
185
186 /** Flag is set for compiler-generated compound classes
187 * representing multiple variable bounds
188 */
189 @Use({FlagTarget.CLASS})
190 public static final int COMPOUND = 1<<24;
191
192 /** Flag is set for class symbols if a class file was found for this class.
193 */
194 @Use({FlagTarget.CLASS})
195 public static final int CLASS_SEEN = 1<<25;
196
197 /** Flag is set for class symbols if a source file was found for this
198 * class.
199 */
200 @Use({FlagTarget.CLASS})
201 public static final int SOURCE_SEEN = 1<<26;
202
203 /* State flags (are reset during compilation).
204 */
205
206 /** Flag for class symbols is set and later re-set as a lock in
207 * Enter to detect cycles in the superclass/superinterface
208 * relations. Similarly for constructor call cycle detection in
209 * Attr.
210 */
211 @Use({FlagTarget.CLASS, FlagTarget.METHOD})
212 public static final int LOCKED = 1<<27;
213
214 /** Flag for class symbols is set and later re-set to indicate that a class
215 * has been entered but has not yet been attributed.
216 */
217 @Use({FlagTarget.CLASS})
218 public static final int UNATTRIBUTED = 1<<28;
219
220 /** Flag for synthesized default constructors of anonymous classes.
221 */
222 @Use({FlagTarget.METHOD})
223 public static final int ANONCONSTR = 1<<29;
224
225 /**
226 * Flag to indicate the superclasses of this ClassSymbol has been attributed.
227 */
228 @Use({FlagTarget.CLASS})
229 public static final int SUPER_OWNER_ATTRIBUTED = 1<<29;
230
231 /** Flag for class symbols to indicate it has been checked and found
232 * acyclic.
233 */
234 @Use({FlagTarget.CLASS, FlagTarget.METHOD, FlagTarget.TYPE_VAR})
235 public static final int ACYCLIC = 1<<30;
236
237 /** Flag that marks bridge methods.
238 */
239 @Use({FlagTarget.METHOD})
240 public static final long BRIDGE = 1L<<31;
241
242 /** Flag that marks formal parameters.
243 */
244 @Use({FlagTarget.VARIABLE})
245 public static final long PARAMETER = 1L<<33;
246
247 /** Flag that marks varargs methods.
248 */
249 @Use({FlagTarget.METHOD, FlagTarget.VARIABLE})
250 public static final long VARARGS = 1L<<34;
251
252 /** Flag for annotation type symbols to indicate it has been
253 * checked and found acyclic.
254 */
255 @Use({FlagTarget.CLASS})
256 public static final long ACYCLIC_ANN = 1L<<35;
257
258 /** Flag that marks a generated default constructor.
259 */
260 @Use({FlagTarget.METHOD})
261 public static final long GENERATEDCONSTR = 1L<<36;
262
263 /** Flag that marks a hypothetical method that need not really be
264 * generated in the binary, but is present in the symbol table to
265 * simplify checking for erasure clashes - also used for 292 poly sig methods.
266 */
267 @Use({FlagTarget.METHOD})
268 public static final long HYPOTHETICAL = 1L<<37;
269
270 /**
271 * Flag that marks an internal proprietary class.
272 */
273 @Use({FlagTarget.CLASS})
274 public static final long PROPRIETARY = 1L<<38;
275
276 /**
277 * Flag that marks a multi-catch parameter.
278 */
279 @Use({FlagTarget.VARIABLE})
280 public static final long UNION = 1L<<39;
281
282 /**
283 * Flags an erroneous TypeSymbol as viable for recovery.
284 * TypeSymbols only.
285 */
286 @Use({FlagTarget.CLASS, FlagTarget.TYPE_VAR})
287 public static final long RECOVERABLE = 1L<<40;
288
289 /**
290 * Flag that marks an 'effectively final' local variable.
291 */
292 @Use({FlagTarget.VARIABLE})
293 public static final long EFFECTIVELY_FINAL = 1L<<41;
294
295 /**
296 * Flag that marks non-override equivalent methods with the same signature,
297 * or a conflicting match binding (BindingSymbol).
298 */
299 @Use({FlagTarget.METHOD, FlagTarget.VARIABLE})
300 public static final long CLASH = 1L<<42;
301
302 /**
303 * Flag that marks either a default method or an interface containing default methods.
304 */
305 @Use({FlagTarget.CLASS, FlagTarget.METHOD})
306 public static final long DEFAULT = 1L<<43; // part of ExtendedStandardFlags, cannot be reused
307
308 /**
309 * Flag that marks class as auxiliary, ie a non-public class following
310 * the public class in a source file, that could block implicit compilation.
311 */
312 @Use({FlagTarget.CLASS})
313 public static final long AUXILIARY = 1L<<44;
314
315 /**
316 * Flag that marks that a symbol is not available in the current profile
317 */
318 @Use({FlagTarget.CLASS})
319 public static final long NOT_IN_PROFILE = 1L<<45;
320
321 /**
322 * Flag that indicates that an override error has been detected by Check.
323 */
324 @Use({FlagTarget.METHOD})
325 public static final long BAD_OVERRIDE = 1L<<45;
326
327 /**
328 * Flag that indicates a signature polymorphic method (292).
329 */
330 @Use({FlagTarget.METHOD})
331 public static final long SIGNATURE_POLYMORPHIC = 1L<<46;
332
333 /**
334 * Flag that indicates that an inference variable is used in a 'throws' clause.
335 */
336 @Use({FlagTarget.TYPE_VAR})
337 public static final long THROWS = 1L<<47;
338
339 /**
340 * Flag to indicate sealed class/interface declaration.
341 */
342 @Use({FlagTarget.CLASS})
343 public static final long SEALED = 1L<<48; // part of ExtendedStandardFlags, cannot be reused
344
345 /**
346 * Flag that marks a synthetic method body for a lambda expression
347 */
348 @Use({FlagTarget.METHOD})
349 public static final long LAMBDA_METHOD = 1L<<49;
350
351 /**
352 * Flag that marks a synthetic local capture field in a local/anon class
353 */
354 @Use({FlagTarget.VARIABLE})
355 public static final long LOCAL_CAPTURE_FIELD = 1L<<49;
356
357 /**
358 * Flag to control recursion in TransTypes
359 */
360 @Use({FlagTarget.CLASS})
361 public static final long TYPE_TRANSLATED = 1L<<50;
362
363 /**
364 * Flag to indicate class symbol is for module-info
365 */
366 @Use({FlagTarget.CLASS})
367 public static final long MODULE = 1L<<51;
368
369 /**
370 * Flag to indicate the given ModuleSymbol is an automatic module.
371 */
372 @Use({FlagTarget.MODULE})
373 public static final long AUTOMATIC_MODULE = 1L<<52;
374
375 /**
376 * Flag to indicate the given PackageSymbol contains any non-.java and non-.class resources.
377 */
378 @Use({FlagTarget.PACKAGE})
379 public static final long HAS_RESOURCE = 1L<<52;
380
381 /**
382 * Flag to indicate the given ParamSymbol has a user-friendly name filled.
383 */
384 @Use({FlagTarget.VARIABLE}) //ParamSymbols only
385 public static final long NAME_FILLED = 1L<<52;
386
387 /**
388 * Flag to indicate the given ModuleSymbol is a system module.
389 */
390 @Use({FlagTarget.MODULE})
391 public static final long SYSTEM_MODULE = 1L<<53;
392
393 /**
394 * Flag to indicate the given ClassSymbol is a value based.
395 */
396 @Use({FlagTarget.CLASS})
397 public static final long VALUE_BASED = 1L<<53;
398
399 /**
400 * Flag to indicate the given symbol has a @Deprecated annotation.
401 */
402 @Use({FlagTarget.CLASS, FlagTarget.METHOD, FlagTarget.MODULE, FlagTarget.PACKAGE, FlagTarget.TYPE_VAR, FlagTarget.VARIABLE})
403 public static final long DEPRECATED_ANNOTATION = 1L<<54;
404
405 /**
406 * Flag to indicate the given symbol has been deprecated and marked for removal.
407 */
408 @Use({FlagTarget.CLASS, FlagTarget.METHOD, FlagTarget.MODULE, FlagTarget.PACKAGE, FlagTarget.TYPE_VAR, FlagTarget.VARIABLE})
409 public static final long DEPRECATED_REMOVAL = 1L<<55;
410
411 /**
412 * Flag to indicate the API element in question is for a preview API.
413 */
414 @Use({FlagTarget.CLASS, FlagTarget.METHOD, FlagTarget.MODULE, FlagTarget.PACKAGE, FlagTarget.TYPE_VAR, FlagTarget.VARIABLE})
415 public static final long PREVIEW_API = 1L<<56; //any Symbol kind
416
417 /**
418 * Flag for synthesized default constructors of anonymous classes that have an enclosing expression.
419 */
420 @Use({FlagTarget.METHOD})
421 public static final long ANONCONSTR_BASED = 1L<<57;
422
423 /**
424 * Flag that marks finalize block as body-only, should not be copied into catch clauses.
425 * Used to implement try-with-resources.
426 */
427 @Use({FlagTarget.BLOCK})
428 public static final long BODY_ONLY_FINALIZE = 1L<<17;
429
430 /**
431 * Flag to indicate the API element in question is for a preview API.
432 */
433 @Use({FlagTarget.CLASS, FlagTarget.METHOD, FlagTarget.MODULE, FlagTarget.PACKAGE, FlagTarget.TYPE_VAR, FlagTarget.VARIABLE})
434 public static final long PREVIEW_REFLECTIVE = 1L<<58; //any Symbol kind
435
436 /**
437 * Flag to indicate the given variable is a match binding variable.
438 */
439 @Use({FlagTarget.VARIABLE})
440 public static final long MATCH_BINDING = 1L<<59;
441
442 /**
443 * A flag to indicate a match binding variable whose scope extends after the current statement.
444 */
445 @Use({FlagTarget.VARIABLE})
446 public static final long MATCH_BINDING_TO_OUTER = 1L<<60;
447
448 /**
449 * Flag to indicate that a class is a record. The flag is also used to mark fields that are
450 * part of the state vector of a record and to mark the canonical constructor
451 */
452 @Use({FlagTarget.CLASS, FlagTarget.VARIABLE, FlagTarget.METHOD})
453 public static final long RECORD = 1L<<61;
454
455 /**
456 * Flag to mark a record constructor as a compact one
457 */
458 @Use({FlagTarget.METHOD})
459 public static final long COMPACT_RECORD_CONSTRUCTOR = 1L<<51;
460
461 /**
462 * Flag to mark a record field that was not initialized in the compact constructor
463 */
464 @Use({FlagTarget.VARIABLE})
465 public static final long UNINITIALIZED_FIELD= 1L<<51;
466
467 /** Flag is set for compiler-generated record members, it could be applied to
468 * accessors and fields
469 */
470 @Use({FlagTarget.METHOD, FlagTarget.VARIABLE})
471 public static final int GENERATED_MEMBER = 1<<24;
472
473 /**
474 * Flag to indicate restricted method declaration.
475 */
476 @Use({FlagTarget.METHOD})
477 public static final long RESTRICTED = 1L<<62;
478
479 /**
480 * Flag to indicate parameters that require identity.
481 */
482 @Use({FlagTarget.VARIABLE}) //ParamSymbols only
483 public static final long REQUIRES_IDENTITY = 1L<<62;
484
485 /**
486 * Flag to indicate type annotations have been queued for field initializers.
487 */
488 @Use({FlagTarget.VARIABLE})
489 public static final long FIELD_INIT_TYPE_ANNOTATIONS_QUEUED = 1L<<53;
490
491 /**
492 * Flag to indicate that the class/interface was declared with the non-sealed modifier.
493 */
494 @Use({FlagTarget.CLASS})
495 @CustomToStringValue("non-sealed")
496 public static final long NON_SEALED = 1L<<63; // part of ExtendedStandardFlags, cannot be reused
497
498 /**
499 * Describe modifier flags as they might appear in source code, i.e.,
500 * separated by spaces and in the order suggested by JLS 8.1.1.
501 */
502 public static String toSource(long flags) {
503 return asModifierSet(flags).stream()
504 .map(Modifier::toString)
505 .collect(Collectors.joining(" "));
506 }
507
508 /** Modifier masks.
509 */
510 @NotFlag
511 public static final int
512 AccessFlags = PUBLIC | PROTECTED | PRIVATE,
513 LocalClassFlags = FINAL | ABSTRACT | STRICTFP | ENUM | SYNTHETIC,
514 StaticLocalFlags = LocalClassFlags | STATIC | INTERFACE,
515 MemberClassFlags = LocalClassFlags | INTERFACE | AccessFlags,
516 MemberStaticClassFlags = MemberClassFlags | STATIC,
517 ClassFlags = LocalClassFlags | INTERFACE | PUBLIC | ANNOTATION,
518 InterfaceVarFlags = FINAL | STATIC | PUBLIC,
519 VarFlags = AccessFlags | FINAL | STATIC |
520 VOLATILE | TRANSIENT | ENUM,
521 ConstructorFlags = AccessFlags,
522 InterfaceMethodFlags = ABSTRACT | PUBLIC,
523 MethodFlags = AccessFlags | ABSTRACT | STATIC | NATIVE |
524 SYNCHRONIZED | FINAL | STRICTFP,
525 RecordMethodFlags = AccessFlags | ABSTRACT | STATIC |
526 SYNCHRONIZED | FINAL | STRICTFP;
527 @NotFlag
528 public static final long
529 //NOTE: flags in ExtendedStandardFlags cannot be overlayed across Symbol kinds:
530 ExtendedStandardFlags = (long)StandardFlags | DEFAULT | SEALED | NON_SEALED,
531 ExtendedMemberClassFlags = (long)MemberClassFlags | SEALED | NON_SEALED,
532 ExtendedMemberStaticClassFlags = (long) MemberStaticClassFlags | SEALED | NON_SEALED,
533 ExtendedClassFlags = (long)ClassFlags | SEALED | NON_SEALED,
534 ModifierFlags = ((long)StandardFlags & ~INTERFACE) | DEFAULT | SEALED | NON_SEALED,
535 InterfaceMethodMask = ABSTRACT | PRIVATE | STATIC | PUBLIC | STRICTFP | DEFAULT,
536 AnnotationTypeElementMask = ABSTRACT | PUBLIC,
537 LocalVarFlags = FINAL | PARAMETER,
538 ReceiverParamFlags = PARAMETER;
539
540 public static Set<Modifier> asModifierSet(long flags) {
541 Set<Modifier> modifiers = modifierSets.get(flags);
542 if (modifiers == null) {
543 modifiers = java.util.EnumSet.noneOf(Modifier.class);
544 if (0 != (flags & PUBLIC)) modifiers.add(Modifier.PUBLIC);
545 if (0 != (flags & PROTECTED)) modifiers.add(Modifier.PROTECTED);
546 if (0 != (flags & PRIVATE)) modifiers.add(Modifier.PRIVATE);
547 if (0 != (flags & ABSTRACT)) modifiers.add(Modifier.ABSTRACT);
548 if (0 != (flags & STATIC)) modifiers.add(Modifier.STATIC);
549 if (0 != (flags & SEALED)) modifiers.add(Modifier.SEALED);
550 if (0 != (flags & NON_SEALED))
551 modifiers.add(Modifier.NON_SEALED);
552 if (0 != (flags & FINAL)) modifiers.add(Modifier.FINAL);
553 if (0 != (flags & TRANSIENT)) modifiers.add(Modifier.TRANSIENT);
554 if (0 != (flags & VOLATILE)) modifiers.add(Modifier.VOLATILE);
555 if (0 != (flags & SYNCHRONIZED))
556 modifiers.add(Modifier.SYNCHRONIZED);
557 if (0 != (flags & NATIVE)) modifiers.add(Modifier.NATIVE);
558 if (0 != (flags & STRICTFP)) modifiers.add(Modifier.STRICTFP);
559 if (0 != (flags & DEFAULT)) modifiers.add(Modifier.DEFAULT);
560 modifiers = Collections.unmodifiableSet(modifiers);
561 modifierSets.put(flags, modifiers);
562 }
563 return modifiers;
564 }
565
566 // Cache of modifier sets.
567 private static final Map<Long, Set<Modifier>> modifierSets = new ConcurrentHashMap<>(64);
568
569 public static boolean isStatic(Symbol symbol) {
570 return (symbol.flags() & STATIC) != 0;
571 }
572
573 public static boolean isEnum(Symbol symbol) {
574 return (symbol.flags() & ENUM) != 0;
575 }
576
577 public static boolean isConstant(Symbol.VarSymbol symbol) {
578 return symbol.getConstValue() != null;
579 }
580
581 public enum FlagTarget {
582 /** This flag can appear the JCBlock.
583 */
584 BLOCK,
585 /** This flag can appear on ClassSymbols.
586 */
587 CLASS,
588 /** This flag can appear on ModuleSymbols.
589 */
590 MODULE,
591 /** This flag can appear on PackageSymbols.
592 */
593 PACKAGE,
594 /** This flag can appear on TypeVarSymbols.
595 */
596 TYPE_VAR,
597 /** This flag can appear on MethodSymbols.
598 */
599 METHOD,
600 /** This flag can appear on VarSymbols, includes
601 * including ParamSymbol, and BindingSymbol.
602 */
603 VARIABLE;
604 }
605
606 @Retention(RetentionPolicy.RUNTIME)
607 public @interface Use {
608 public FlagTarget[] value();
609 }
610
611 @Retention(RetentionPolicy.RUNTIME)
612 public @interface NotFlag {}
613
614 @Retention(RetentionPolicy.RUNTIME)
615 public @interface CustomToStringValue {
616 public String value();
617 }
618
619 @Retention(RetentionPolicy.RUNTIME)
620 public @interface NoToStringValue {
621 }
622 }