src/share/classes/com/sun/source/tree/Tree.java

Fri, 26 Jun 2009 18:51:39 -0700

author
jjg
date
Fri, 26 Jun 2009 18:51:39 -0700
changeset 308
03944ee4fac4
parent 1
9a66ca7c79fa
child 550
a6f2911a7c55
permissions
-rw-r--r--

6843077: JSR 308: Annotations on types
Reviewed-by: jjg, mcimadamore, darcy
Contributed-by: mernst@cs.washington.edu, mali@csail.mit.edu, mpapi@csail.mit.edu

duke@1 1 /*
duke@1 2 * Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved.
duke@1 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@1 4 *
duke@1 5 * This code is free software; you can redistribute it and/or modify it
duke@1 6 * under the terms of the GNU General Public License version 2 only, as
duke@1 7 * published by the Free Software Foundation. Sun designates this
duke@1 8 * particular file as subject to the "Classpath" exception as provided
duke@1 9 * by Sun in the LICENSE file that accompanied this code.
duke@1 10 *
duke@1 11 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@1 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@1 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@1 14 * version 2 for more details (a copy is included in the LICENSE file that
duke@1 15 * accompanied this code).
duke@1 16 *
duke@1 17 * You should have received a copy of the GNU General Public License version
duke@1 18 * 2 along with this work; if not, write to the Free Software Foundation,
duke@1 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@1 20 *
duke@1 21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@1 22 * CA 95054 USA or visit www.sun.com if you need additional information or
duke@1 23 * have any questions.
duke@1 24 */
duke@1 25
duke@1 26 package com.sun.source.tree;
duke@1 27
duke@1 28 /**
duke@1 29 * Common interface for all nodes in an abstract syntax tree.
duke@1 30 *
duke@1 31 * <p><b>WARNING:</b> This interface and its sub-interfaces are
duke@1 32 * subject to change as the Java&trade; programming language evolves.
duke@1 33 * These interfaces are implemented by Sun's Java compiler (javac)
duke@1 34 * and should not be implemented either directly or indirectly by
duke@1 35 * other applications.
duke@1 36 *
duke@1 37 * @author Peter von der Ah&eacute;
duke@1 38 * @author Jonathan Gibbons
duke@1 39 *
duke@1 40 * @since 1.6
duke@1 41 */
duke@1 42 public interface Tree {
duke@1 43
duke@1 44 /**
duke@1 45 * Enumerates all kinds of trees.
duke@1 46 */
duke@1 47 public enum Kind {
jjg@308 48
jjg@308 49 ANNOTATED_TYPE(AnnotatedTypeTree.class),
jjg@308 50
duke@1 51 /**
duke@1 52 * Used for instances of {@link AnnotationTree}.
duke@1 53 */
duke@1 54 ANNOTATION(AnnotationTree.class),
duke@1 55
duke@1 56 /**
duke@1 57 * Used for instances of {@link ArrayAccessTree}.
duke@1 58 */
duke@1 59 ARRAY_ACCESS(ArrayAccessTree.class),
duke@1 60
duke@1 61 /**
duke@1 62 * Used for instances of {@link ArrayTypeTree}.
duke@1 63 */
duke@1 64 ARRAY_TYPE(ArrayTypeTree.class),
duke@1 65
duke@1 66 /**
duke@1 67 * Used for instances of {@link AssertTree}.
duke@1 68 */
duke@1 69 ASSERT(AssertTree.class),
duke@1 70
duke@1 71 /**
duke@1 72 * Used for instances of {@link AssignmentTree}.
duke@1 73 */
duke@1 74 ASSIGNMENT(AssignmentTree.class),
duke@1 75
duke@1 76 /**
duke@1 77 * Used for instances of {@link BlockTree}.
duke@1 78 */
duke@1 79 BLOCK(BlockTree.class),
duke@1 80
duke@1 81 /**
duke@1 82 * Used for instances of {@link BreakTree}.
duke@1 83 */
duke@1 84 BREAK(BreakTree.class),
duke@1 85
duke@1 86 /**
duke@1 87 * Used for instances of {@link CaseTree}.
duke@1 88 */
duke@1 89 CASE(CaseTree.class),
duke@1 90
duke@1 91 /**
duke@1 92 * Used for instances of {@link CatchTree}.
duke@1 93 */
duke@1 94 CATCH(CatchTree.class),
duke@1 95
duke@1 96 /**
duke@1 97 * Used for instances of {@link ClassTree}.
duke@1 98 */
duke@1 99 CLASS(ClassTree.class),
duke@1 100
duke@1 101 /**
duke@1 102 * Used for instances of {@link CompilationUnitTree}.
duke@1 103 */
duke@1 104 COMPILATION_UNIT(CompilationUnitTree.class),
duke@1 105
duke@1 106 /**
duke@1 107 * Used for instances of {@link ConditionalExpressionTree}.
duke@1 108 */
duke@1 109 CONDITIONAL_EXPRESSION(ConditionalExpressionTree.class),
duke@1 110
duke@1 111 /**
duke@1 112 * Used for instances of {@link ContinueTree}.
duke@1 113 */
duke@1 114 CONTINUE(ContinueTree.class),
duke@1 115
duke@1 116 /**
duke@1 117 * Used for instances of {@link DoWhileLoopTree}.
duke@1 118 */
duke@1 119 DO_WHILE_LOOP(DoWhileLoopTree.class),
duke@1 120
duke@1 121 /**
duke@1 122 * Used for instances of {@link EnhancedForLoopTree}.
duke@1 123 */
duke@1 124 ENHANCED_FOR_LOOP(EnhancedForLoopTree.class),
duke@1 125
duke@1 126 /**
duke@1 127 * Used for instances of {@link ExpressionStatementTree}.
duke@1 128 */
duke@1 129 EXPRESSION_STATEMENT(ExpressionStatementTree.class),
duke@1 130
duke@1 131 /**
duke@1 132 * Used for instances of {@link MemberSelectTree}.
duke@1 133 */
duke@1 134 MEMBER_SELECT(MemberSelectTree.class),
duke@1 135
duke@1 136 /**
duke@1 137 * Used for instances of {@link ForLoopTree}.
duke@1 138 */
duke@1 139 FOR_LOOP(ForLoopTree.class),
duke@1 140
duke@1 141 /**
duke@1 142 * Used for instances of {@link IdentifierTree}.
duke@1 143 */
duke@1 144 IDENTIFIER(IdentifierTree.class),
duke@1 145
duke@1 146 /**
duke@1 147 * Used for instances of {@link IfTree}.
duke@1 148 */
duke@1 149 IF(IfTree.class),
duke@1 150
duke@1 151 /**
duke@1 152 * Used for instances of {@link ImportTree}.
duke@1 153 */
duke@1 154 IMPORT(ImportTree.class),
duke@1 155
duke@1 156 /**
duke@1 157 * Used for instances of {@link InstanceOfTree}.
duke@1 158 */
duke@1 159 INSTANCE_OF(InstanceOfTree.class),
duke@1 160
duke@1 161 /**
duke@1 162 * Used for instances of {@link LabeledStatementTree}.
duke@1 163 */
duke@1 164 LABELED_STATEMENT(LabeledStatementTree.class),
duke@1 165
duke@1 166 /**
duke@1 167 * Used for instances of {@link MethodTree}.
duke@1 168 */
duke@1 169 METHOD(MethodTree.class),
duke@1 170
duke@1 171 /**
duke@1 172 * Used for instances of {@link MethodInvocationTree}.
duke@1 173 */
duke@1 174 METHOD_INVOCATION(MethodInvocationTree.class),
duke@1 175
duke@1 176 /**
duke@1 177 * Used for instances of {@link ModifiersTree}.
duke@1 178 */
duke@1 179 MODIFIERS(ModifiersTree.class),
duke@1 180
duke@1 181 /**
duke@1 182 * Used for instances of {@link NewArrayTree}.
duke@1 183 */
duke@1 184 NEW_ARRAY(NewArrayTree.class),
duke@1 185
duke@1 186 /**
duke@1 187 * Used for instances of {@link NewClassTree}.
duke@1 188 */
duke@1 189 NEW_CLASS(NewClassTree.class),
duke@1 190
duke@1 191 /**
duke@1 192 * Used for instances of {@link ParenthesizedTree}.
duke@1 193 */
duke@1 194 PARENTHESIZED(ParenthesizedTree.class),
duke@1 195
duke@1 196 /**
duke@1 197 * Used for instances of {@link PrimitiveTypeTree}.
duke@1 198 */
duke@1 199 PRIMITIVE_TYPE(PrimitiveTypeTree.class),
duke@1 200
duke@1 201 /**
duke@1 202 * Used for instances of {@link ReturnTree}.
duke@1 203 */
duke@1 204 RETURN(ReturnTree.class),
duke@1 205
duke@1 206 /**
duke@1 207 * Used for instances of {@link EmptyStatementTree}.
duke@1 208 */
duke@1 209 EMPTY_STATEMENT(EmptyStatementTree.class),
duke@1 210
duke@1 211 /**
duke@1 212 * Used for instances of {@link SwitchTree}.
duke@1 213 */
duke@1 214 SWITCH(SwitchTree.class),
duke@1 215
duke@1 216 /**
duke@1 217 * Used for instances of {@link SynchronizedTree}.
duke@1 218 */
duke@1 219 SYNCHRONIZED(SynchronizedTree.class),
duke@1 220
duke@1 221 /**
duke@1 222 * Used for instances of {@link ThrowTree}.
duke@1 223 */
duke@1 224 THROW(ThrowTree.class),
duke@1 225
duke@1 226 /**
duke@1 227 * Used for instances of {@link TryTree}.
duke@1 228 */
duke@1 229 TRY(TryTree.class),
duke@1 230
duke@1 231 /**
duke@1 232 * Used for instances of {@link ParameterizedTypeTree}.
duke@1 233 */
duke@1 234 PARAMETERIZED_TYPE(ParameterizedTypeTree.class),
duke@1 235
duke@1 236 /**
duke@1 237 * Used for instances of {@link TypeCastTree}.
duke@1 238 */
duke@1 239 TYPE_CAST(TypeCastTree.class),
duke@1 240
duke@1 241 /**
duke@1 242 * Used for instances of {@link TypeParameterTree}.
duke@1 243 */
duke@1 244 TYPE_PARAMETER(TypeParameterTree.class),
duke@1 245
duke@1 246 /**
duke@1 247 * Used for instances of {@link VariableTree}.
duke@1 248 */
duke@1 249 VARIABLE(VariableTree.class),
duke@1 250
duke@1 251 /**
duke@1 252 * Used for instances of {@link WhileLoopTree}.
duke@1 253 */
duke@1 254 WHILE_LOOP(WhileLoopTree.class),
duke@1 255
duke@1 256 /**
duke@1 257 * Used for instances of {@link UnaryTree} representing postfix
duke@1 258 * increment operator {@code ++}.
duke@1 259 */
duke@1 260 POSTFIX_INCREMENT(UnaryTree.class),
duke@1 261
duke@1 262 /**
duke@1 263 * Used for instances of {@link UnaryTree} representing postfix
duke@1 264 * decrement operator {@code --}.
duke@1 265 */
duke@1 266 POSTFIX_DECREMENT(UnaryTree.class),
duke@1 267
duke@1 268 /**
duke@1 269 * Used for instances of {@link UnaryTree} representing prefix
duke@1 270 * increment operator {@code ++}.
duke@1 271 */
duke@1 272 PREFIX_INCREMENT(UnaryTree.class),
duke@1 273
duke@1 274 /**
duke@1 275 * Used for instances of {@link UnaryTree} representing prefix
duke@1 276 * decrement operator {@code --}.
duke@1 277 */
duke@1 278 PREFIX_DECREMENT(UnaryTree.class),
duke@1 279
duke@1 280 /**
duke@1 281 * Used for instances of {@link UnaryTree} representing unary plus
duke@1 282 * operator {@code +}.
duke@1 283 */
duke@1 284 UNARY_PLUS(UnaryTree.class),
duke@1 285
duke@1 286 /**
duke@1 287 * Used for instances of {@link UnaryTree} representing unary minus
duke@1 288 * operator {@code -}.
duke@1 289 */
duke@1 290 UNARY_MINUS(UnaryTree.class),
duke@1 291
duke@1 292 /**
duke@1 293 * Used for instances of {@link UnaryTree} representing bitwise
duke@1 294 * complement operator {@code ~}.
duke@1 295 */
duke@1 296 BITWISE_COMPLEMENT(UnaryTree.class),
duke@1 297
duke@1 298 /**
duke@1 299 * Used for instances of {@link UnaryTree} representing logical
duke@1 300 * complement operator {@code !}.
duke@1 301 */
duke@1 302 LOGICAL_COMPLEMENT(UnaryTree.class),
duke@1 303
duke@1 304 /**
duke@1 305 * Used for instances of {@link BinaryTree} representing
duke@1 306 * multiplication {@code *}.
duke@1 307 */
duke@1 308 MULTIPLY(BinaryTree.class),
duke@1 309
duke@1 310 /**
duke@1 311 * Used for instances of {@link BinaryTree} representing
duke@1 312 * division {@code /}.
duke@1 313 */
duke@1 314 DIVIDE(BinaryTree.class),
duke@1 315
duke@1 316 /**
duke@1 317 * Used for instances of {@link BinaryTree} representing
duke@1 318 * remainder {@code %}.
duke@1 319 */
duke@1 320 REMAINDER(BinaryTree.class),
duke@1 321
duke@1 322 /**
duke@1 323 * Used for instances of {@link BinaryTree} representing
duke@1 324 * addition or string concatenation {@code +}.
duke@1 325 */
duke@1 326 PLUS(BinaryTree.class),
duke@1 327
duke@1 328 /**
duke@1 329 * Used for instances of {@link BinaryTree} representing
duke@1 330 * subtraction {@code -}.
duke@1 331 */
duke@1 332 MINUS(BinaryTree.class),
duke@1 333
duke@1 334 /**
duke@1 335 * Used for instances of {@link BinaryTree} representing
duke@1 336 * left shift {@code <<}.
duke@1 337 */
duke@1 338 LEFT_SHIFT(BinaryTree.class),
duke@1 339
duke@1 340 /**
duke@1 341 * Used for instances of {@link BinaryTree} representing
duke@1 342 * right shift {@code >>}.
duke@1 343 */
duke@1 344 RIGHT_SHIFT(BinaryTree.class),
duke@1 345
duke@1 346 /**
duke@1 347 * Used for instances of {@link BinaryTree} representing
duke@1 348 * unsigned right shift {@code >>>}.
duke@1 349 */
duke@1 350 UNSIGNED_RIGHT_SHIFT(BinaryTree.class),
duke@1 351
duke@1 352 /**
duke@1 353 * Used for instances of {@link BinaryTree} representing
duke@1 354 * less-than {@code <}.
duke@1 355 */
duke@1 356 LESS_THAN(BinaryTree.class),
duke@1 357
duke@1 358 /**
duke@1 359 * Used for instances of {@link BinaryTree} representing
duke@1 360 * greater-than {@code >}.
duke@1 361 */
duke@1 362 GREATER_THAN(BinaryTree.class),
duke@1 363
duke@1 364 /**
duke@1 365 * Used for instances of {@link BinaryTree} representing
duke@1 366 * less-than-equal {@code <=}.
duke@1 367 */
duke@1 368 LESS_THAN_EQUAL(BinaryTree.class),
duke@1 369
duke@1 370 /**
duke@1 371 * Used for instances of {@link BinaryTree} representing
duke@1 372 * greater-than-equal {@code >=}.
duke@1 373 */
duke@1 374 GREATER_THAN_EQUAL(BinaryTree.class),
duke@1 375
duke@1 376 /**
duke@1 377 * Used for instances of {@link BinaryTree} representing
duke@1 378 * equal-to {@code ==}.
duke@1 379 */
duke@1 380 EQUAL_TO(BinaryTree.class),
duke@1 381
duke@1 382 /**
duke@1 383 * Used for instances of {@link BinaryTree} representing
duke@1 384 * not-equal-to {@code !=}.
duke@1 385 */
duke@1 386 NOT_EQUAL_TO(BinaryTree.class),
duke@1 387
duke@1 388 /**
duke@1 389 * Used for instances of {@link BinaryTree} representing
duke@1 390 * bitwise and logical "and" {@code &}.
duke@1 391 */
duke@1 392 AND(BinaryTree.class),
duke@1 393
duke@1 394 /**
duke@1 395 * Used for instances of {@link BinaryTree} representing
duke@1 396 * bitwise and logical "xor" {@code ^}.
duke@1 397 */
duke@1 398 XOR(BinaryTree.class),
duke@1 399
duke@1 400 /**
duke@1 401 * Used for instances of {@link BinaryTree} representing
duke@1 402 * bitwise and logical "or" {@code |}.
duke@1 403 */
duke@1 404 OR(BinaryTree.class),
duke@1 405
duke@1 406 /**
duke@1 407 * Used for instances of {@link BinaryTree} representing
duke@1 408 * conditional-and {@code &&}.
duke@1 409 */
duke@1 410 CONDITIONAL_AND(BinaryTree.class),
duke@1 411
duke@1 412 /**
duke@1 413 * Used for instances of {@link BinaryTree} representing
duke@1 414 * conditional-or {@code ||}.
duke@1 415 */
duke@1 416 CONDITIONAL_OR(BinaryTree.class),
duke@1 417
duke@1 418 /**
duke@1 419 * Used for instances of {@link CompoundAssignmentTree} representing
duke@1 420 * multiplication assignment {@code *=}.
duke@1 421 */
duke@1 422 MULTIPLY_ASSIGNMENT(CompoundAssignmentTree.class),
duke@1 423
duke@1 424 /**
duke@1 425 * Used for instances of {@link CompoundAssignmentTree} representing
duke@1 426 * division assignment {@code /=}.
duke@1 427 */
duke@1 428 DIVIDE_ASSIGNMENT(CompoundAssignmentTree.class),
duke@1 429
duke@1 430 /**
duke@1 431 * Used for instances of {@link CompoundAssignmentTree} representing
duke@1 432 * remainder assignment {@code %=}.
duke@1 433 */
duke@1 434 REMAINDER_ASSIGNMENT(CompoundAssignmentTree.class),
duke@1 435
duke@1 436 /**
duke@1 437 * Used for instances of {@link CompoundAssignmentTree} representing
duke@1 438 * addition or string concatenation assignment {@code +=}.
duke@1 439 */
duke@1 440 PLUS_ASSIGNMENT(CompoundAssignmentTree.class),
duke@1 441
duke@1 442 /**
duke@1 443 * Used for instances of {@link CompoundAssignmentTree} representing
duke@1 444 * subtraction assignment {@code -=}.
duke@1 445 */
duke@1 446 MINUS_ASSIGNMENT(CompoundAssignmentTree.class),
duke@1 447
duke@1 448 /**
duke@1 449 * Used for instances of {@link CompoundAssignmentTree} representing
duke@1 450 * left shift assignment {@code <<=}.
duke@1 451 */
duke@1 452 LEFT_SHIFT_ASSIGNMENT(CompoundAssignmentTree.class),
duke@1 453
duke@1 454 /**
duke@1 455 * Used for instances of {@link CompoundAssignmentTree} representing
duke@1 456 * right shift assignment {@code >>=}.
duke@1 457 */
duke@1 458 RIGHT_SHIFT_ASSIGNMENT(CompoundAssignmentTree.class),
duke@1 459
duke@1 460 /**
duke@1 461 * Used for instances of {@link CompoundAssignmentTree} representing
duke@1 462 * unsigned right shift assignment {@code >>>=}.
duke@1 463 */
duke@1 464 UNSIGNED_RIGHT_SHIFT_ASSIGNMENT(CompoundAssignmentTree.class),
duke@1 465
duke@1 466 /**
duke@1 467 * Used for instances of {@link CompoundAssignmentTree} representing
duke@1 468 * bitwise and logical "and" assignment {@code &=}.
duke@1 469 */
duke@1 470 AND_ASSIGNMENT(CompoundAssignmentTree.class),
duke@1 471
duke@1 472 /**
duke@1 473 * Used for instances of {@link CompoundAssignmentTree} representing
duke@1 474 * bitwise and logical "xor" assignment {@code ^=}.
duke@1 475 */
duke@1 476 XOR_ASSIGNMENT(CompoundAssignmentTree.class),
duke@1 477
duke@1 478 /**
duke@1 479 * Used for instances of {@link CompoundAssignmentTree} representing
duke@1 480 * bitwise and logical "or" assignment {@code |=}.
duke@1 481 */
duke@1 482 OR_ASSIGNMENT(CompoundAssignmentTree.class),
duke@1 483
duke@1 484 /**
duke@1 485 * Used for instances of {@link LiteralTree} representing
duke@1 486 * an integral literal expression of type {@code int}.
duke@1 487 */
duke@1 488 INT_LITERAL(LiteralTree.class),
duke@1 489
duke@1 490 /**
duke@1 491 * Used for instances of {@link LiteralTree} representing
duke@1 492 * an integral literal expression of type {@code long}.
duke@1 493 */
duke@1 494 LONG_LITERAL(LiteralTree.class),
duke@1 495
duke@1 496 /**
duke@1 497 * Used for instances of {@link LiteralTree} representing
duke@1 498 * a floating-point literal expression of type {@code float}.
duke@1 499 */
duke@1 500 FLOAT_LITERAL(LiteralTree.class),
duke@1 501
duke@1 502 /**
duke@1 503 * Used for instances of {@link LiteralTree} representing
duke@1 504 * a floating-point literal expression of type {@code double}.
duke@1 505 */
duke@1 506 DOUBLE_LITERAL(LiteralTree.class),
duke@1 507
duke@1 508 /**
duke@1 509 * Used for instances of {@link LiteralTree} representing
duke@1 510 * a boolean literal expression of type {@code boolean}.
duke@1 511 */
duke@1 512 BOOLEAN_LITERAL(LiteralTree.class),
duke@1 513
duke@1 514 /**
duke@1 515 * Used for instances of {@link LiteralTree} representing
duke@1 516 * a character literal expression of type {@code char}.
duke@1 517 */
duke@1 518 CHAR_LITERAL(LiteralTree.class),
duke@1 519
duke@1 520 /**
duke@1 521 * Used for instances of {@link LiteralTree} representing
duke@1 522 * a string literal expression of type {@link String}.
duke@1 523 */
duke@1 524 STRING_LITERAL(LiteralTree.class),
duke@1 525
duke@1 526 /**
duke@1 527 * Used for instances of {@link LiteralTree} representing
duke@1 528 * the use of {@code null}.
duke@1 529 */
duke@1 530 NULL_LITERAL(LiteralTree.class),
duke@1 531
duke@1 532 /**
duke@1 533 * Used for instances of {@link WildcardTree} representing
duke@1 534 * an unbounded wildcard type argument.
duke@1 535 */
duke@1 536 UNBOUNDED_WILDCARD(WildcardTree.class),
duke@1 537
duke@1 538 /**
duke@1 539 * Used for instances of {@link WildcardTree} representing
duke@1 540 * an extends bounded wildcard type argument.
duke@1 541 */
duke@1 542 EXTENDS_WILDCARD(WildcardTree.class),
duke@1 543
duke@1 544 /**
duke@1 545 * Used for instances of {@link WildcardTree} representing
duke@1 546 * a super bounded wildcard type argument.
duke@1 547 */
duke@1 548 SUPER_WILDCARD(WildcardTree.class),
duke@1 549
duke@1 550 /**
duke@1 551 * Used for instances of {@link ErroneousTree}.
duke@1 552 */
duke@1 553 ERRONEOUS(ErroneousTree.class),
duke@1 554
duke@1 555 /**
duke@1 556 * An implementation-reserved node. This is the not the node
duke@1 557 * you are looking for.
duke@1 558 */
duke@1 559 OTHER(null);
duke@1 560
duke@1 561
duke@1 562 Kind(Class<? extends Tree> intf) {
duke@1 563 associatedInterface = intf;
duke@1 564 }
duke@1 565
duke@1 566 public Class<? extends Tree> asInterface() {
duke@1 567 return associatedInterface;
duke@1 568 }
duke@1 569
duke@1 570 private final Class<? extends Tree> associatedInterface;
duke@1 571 }
duke@1 572
duke@1 573 /**
duke@1 574 * Gets the kind of this tree.
duke@1 575 *
duke@1 576 * @return the kind of this tree.
duke@1 577 */
duke@1 578 Kind getKind();
duke@1 579
duke@1 580 /**
duke@1 581 * Accept method used to implement the visitor pattern. The
duke@1 582 * visitor pattern is used to implement operations on trees.
duke@1 583 *
duke@1 584 * @param <R> result type of this operation.
duke@1 585 * @param <D> type of additonal data.
duke@1 586 */
duke@1 587 <R,D> R accept(TreeVisitor<R,D> visitor, D data);
duke@1 588 }

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