1 /*
   2  * Copyright (c) 1999, 2022, 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.tree;
  27 
  28 import java.io.*;
  29 
  30 import com.sun.source.tree.MemberReferenceTree.ReferenceMode;
  31 import com.sun.source.tree.ModuleTree.ModuleKind;
  32 import com.sun.tools.javac.code.*;
  33 import com.sun.tools.javac.tree.JCTree.*;
  34 import com.sun.tools.javac.util.*;
  35 
  36 import static com.sun.tools.javac.code.Flags.*;
  37 import static com.sun.tools.javac.code.Flags.ANNOTATION;
  38 import static com.sun.tools.javac.tree.JCTree.Tag.*;
  39 
  40 /** Prints out a tree as an indented Java source program.
  41  *
  42  *  <p><b>This is NOT part of any supported API.
  43  *  If you write code that depends on this, you do so at your own risk.
  44  *  This code and its internal interfaces are subject to change or
  45  *  deletion without notice.</b>
  46  */
  47 public class Pretty extends JCTree.Visitor {
  48 
  49     public Pretty(Writer out, boolean sourceOutput) {
  50         this.out = out;
  51         this.sourceOutput = sourceOutput;
  52     }
  53 
  54     /** Set when we are producing source output.  If we're not
  55      *  producing source output, we can sometimes give more detail in
  56      *  the output even though that detail would not be valid java
  57      *  source.
  58      */
  59     private final boolean sourceOutput;
  60 
  61     /** The output stream on which trees are printed.
  62      */
  63     Writer out;
  64 
  65     /** Indentation width (can be reassigned from outside).
  66      */
  67     public int width = 4;
  68 
  69     /** The current left margin.
  70      */
  71     int lmargin = 0;
  72 
  73     /** The enclosing class name.
  74      */
  75     Name enclClassName;
  76 
  77     /** A table mapping trees to their documentation comments
  78      *  (can be null)
  79      */
  80     DocCommentTable docComments = null;
  81 
  82     /**
  83      * A string sequence to be used when Pretty output should be constrained
  84      * to fit into a given size
  85      */
  86     private static final String trimSequence = "[...]";
  87 
  88     /**
  89      * Max number of chars to be generated when output should fit into a single line
  90      */
  91     private static final int PREFERRED_LENGTH = 20;
  92 
  93     /** Align code to be indented to left margin.
  94      */
  95     void align() throws IOException {
  96         for (int i = 0; i < lmargin; i++) out.write(" ");
  97     }
  98 
  99     /** Increase left margin by indentation width.
 100      */
 101     void indent() {
 102         lmargin = lmargin + width;
 103     }
 104 
 105     /** Decrease left margin by indentation width.
 106      */
 107     void undent() {
 108         lmargin = lmargin - width;
 109     }
 110 
 111     /** Enter a new precedence level. Emit a `(' if new precedence level
 112      *  is less than precedence level so far.
 113      *  @param contextPrec    The precedence level in force so far.
 114      *  @param ownPrec        The new precedence level.
 115      */
 116     void open(int contextPrec, int ownPrec) throws IOException {
 117         if (ownPrec < contextPrec) out.write("(");
 118     }
 119 
 120     /** Leave precedence level. Emit a `(' if inner precedence level
 121      *  is less than precedence level we revert to.
 122      *  @param contextPrec    The precedence level we revert to.
 123      *  @param ownPrec        The inner precedence level.
 124      */
 125     void close(int contextPrec, int ownPrec) throws IOException {
 126         if (ownPrec < contextPrec) out.write(")");
 127     }
 128 
 129     /** Print string, replacing all non-ascii character with unicode escapes.
 130      */
 131     public void print(Object s) throws IOException {
 132         out.write(Convert.escapeUnicode(s.toString()));
 133     }
 134 
 135     /** Print new line.
 136      */
 137     public void println() throws IOException {
 138         out.write(lineSep);
 139     }
 140 
 141     public static String toSimpleString(JCTree tree) {
 142         return toSimpleString(tree, PREFERRED_LENGTH);
 143     }
 144 
 145     public static String toSimpleString(JCTree tree, int maxLength) {
 146         StringWriter s = new StringWriter();
 147         try {
 148             new Pretty(s, false).printExpr(tree);
 149         }
 150         catch (IOException e) {
 151             // should never happen, because StringWriter is defined
 152             // never to throw any IOExceptions
 153             throw new AssertionError(e);
 154         }
 155         //we need to (i) replace all line terminators with a space and (ii) remove
 156         //occurrences of 'missing' in the Pretty output (generated when types are missing)
 157         String res = s.toString().trim().replaceAll("\\s+", " ").replaceAll("/\\*missing\\*/", "");
 158         if (res.length() < maxLength) {
 159             return res;
 160         } else {
 161             int head = (maxLength - trimSequence.length()) * 2 / 3;
 162             int tail = maxLength - trimSequence.length() - head;
 163             return res.substring(0, head) + trimSequence + res.substring(res.length() - tail);
 164         }
 165     }
 166 
 167     String lineSep = System.getProperty("line.separator");
 168 
 169     /* ************************************************************************
 170      * Traversal methods
 171      *************************************************************************/
 172 
 173     /** Exception to propagate IOException through visitXYZ methods */
 174     private static class UncheckedIOException extends Error {
 175         static final long serialVersionUID = -4032692679158424751L;
 176         UncheckedIOException(IOException e) {
 177             super(e.getMessage(), e);
 178         }
 179     }
 180 
 181     /** Visitor argument: the current precedence level.
 182      */
 183     int prec;
 184 
 185     /** Visitor method: print expression tree.
 186      *  @param prec  The current precedence level.
 187      */
 188     public void printExpr(JCTree tree, int prec) throws IOException {
 189         int prevPrec = this.prec;
 190         try {
 191             this.prec = prec;
 192             if (tree == null) print("/*missing*/");
 193             else {
 194                 tree.accept(this);
 195             }
 196         } catch (UncheckedIOException ex) {
 197             throw new IOException(ex.getMessage(), ex);
 198         } finally {
 199             this.prec = prevPrec;
 200         }
 201     }
 202 
 203     /** Derived visitor method: print expression tree at minimum precedence level
 204      *  for expression.
 205      */
 206     public void printExpr(JCTree tree) throws IOException {
 207         printExpr(tree, TreeInfo.noPrec);
 208     }
 209 
 210     /** Derived visitor method: print statement tree.
 211      */
 212     public void printStat(JCTree tree) throws IOException {
 213         printExpr(tree, TreeInfo.notExpression);
 214     }
 215 
 216     /** Derived visitor method: print list of expression trees, separated by given string.
 217      *  @param sep the separator string
 218      */
 219     public <T extends JCTree> void printExprs(List<T> trees, String sep) throws IOException {
 220         if (trees.nonEmpty()) {
 221             printExpr(trees.head);
 222             for (List<T> l = trees.tail; l.nonEmpty(); l = l.tail) {
 223                 print(sep);
 224                 printExpr(l.head);
 225             }
 226         }
 227     }
 228 
 229     /** Derived visitor method: print list of expression trees, separated by commas.
 230      */
 231     public <T extends JCTree> void printExprs(List<T> trees) throws IOException {
 232         printExprs(trees, ", ");
 233     }
 234 
 235 
 236     /** Derived visitor method: print pattern.
 237      */
 238 
 239     public void printPattern(JCTree tree) throws IOException {
 240         printExpr(tree);
 241     }
 242 
 243     /** Derived visitor method: print list of statements, each on a separate line.
 244      */
 245     public void printStats(List<? extends JCTree> trees) throws IOException {
 246         for (List<? extends JCTree> l = trees; l.nonEmpty(); l = l.tail) {
 247             align();
 248             printStat(l.head);
 249             println();
 250         }
 251     }
 252 
 253     /** Print a set of modifiers.
 254      */
 255     public void printFlags(long flags) throws IOException {
 256         if ((flags & SYNTHETIC) != 0) print("/*synthetic*/ ");
 257         print(TreeInfo.flagNames(flags));
 258         if ((flags & ExtendedStandardFlags) != 0) print(" ");
 259         if ((flags & ANNOTATION) != 0) print("@");
 260     }
 261 
 262     public void printAnnotations(List<JCAnnotation> trees) throws IOException {
 263         for (List<JCAnnotation> l = trees; l.nonEmpty(); l = l.tail) {
 264             printStat(l.head);
 265             println();
 266             align();
 267         }
 268     }
 269 
 270     public void printTypeAnnotations(List<JCAnnotation> trees) throws IOException {
 271         for (List<JCAnnotation> l = trees; l.nonEmpty(); l = l.tail) {
 272             printExpr(l.head);
 273             print(" ");
 274         }
 275     }
 276 
 277     /** Print documentation comment, if it exists
 278      *  @param tree    The tree for which a documentation comment should be printed.
 279      */
 280     public void printDocComment(JCTree tree) throws IOException {
 281         if (docComments != null) {
 282             String dc = docComments.getCommentText(tree);
 283             if (dc != null) {
 284                 print("/**"); println();
 285                 int pos = 0;
 286                 int endpos = lineEndPos(dc, pos);
 287                 while (pos < dc.length()) {
 288                     align();
 289                     print(" *");
 290                     if (pos < dc.length() && dc.charAt(pos) > ' ') print(" ");
 291                     print(dc.substring(pos, endpos)); println();
 292                     pos = endpos + 1;
 293                     endpos = lineEndPos(dc, pos);
 294                 }
 295                 align(); print(" */"); println();
 296                 align();
 297             }
 298         }
 299     }
 300 //where
 301     static int lineEndPos(String s, int start) {
 302         int pos = s.indexOf('\n', start);
 303         if (pos < 0) pos = s.length();
 304         return pos;
 305     }
 306 
 307     /** If type parameter list is non-empty, print it enclosed in
 308      *  {@literal "<...>"} brackets.
 309      */
 310     public void printTypeParameters(List<JCTypeParameter> trees) throws IOException {
 311         if (trees.nonEmpty()) {
 312             print("<");
 313             printExprs(trees);
 314             print(">");
 315         }
 316     }
 317 
 318     /** Print a block.
 319      */
 320     public void printBlock(List<? extends JCTree> stats) throws IOException {
 321         print("{");
 322         println();
 323         indent();
 324         printStats(stats);
 325         undent();
 326         align();
 327         print("}");
 328     }
 329 
 330     /** Print a block.
 331      */
 332     public void printEnumBody(List<JCTree> stats) throws IOException {
 333         print("{");
 334         println();
 335         indent();
 336         boolean first = true;
 337         for (List<JCTree> l = stats; l.nonEmpty(); l = l.tail) {
 338             if (isEnumerator(l.head)) {
 339                 if (!first) {
 340                     print(",");
 341                     println();
 342                 }
 343                 align();
 344                 printStat(l.head);
 345                 first = false;
 346             }
 347         }
 348         print(";");
 349         println();
 350         for (List<JCTree> l = stats; l.nonEmpty(); l = l.tail) {
 351             if (!isEnumerator(l.head)) {
 352                 align();
 353                 printStat(l.head);
 354                 println();
 355             }
 356         }
 357         undent();
 358         align();
 359         print("}");
 360     }
 361 
 362     /** Is the given tree an enumerator definition? */
 363     boolean isEnumerator(JCTree t) {
 364         return t.hasTag(VARDEF) && (((JCVariableDecl) t).mods.flags & ENUM) != 0;
 365     }
 366 
 367     /** Print unit consisting of package clause and import statements in toplevel,
 368      *  followed by class definition. if class definition == null,
 369      *  print all definitions in toplevel.
 370      *  @param tree     The toplevel tree
 371      *  @param cdef     The class definition, which is assumed to be part of the
 372      *                  toplevel tree.
 373      */
 374     public void printUnit(JCCompilationUnit tree, JCClassDecl cdef) throws IOException {
 375         docComments = tree.docComments;
 376         printDocComment(tree);
 377 
 378         boolean firstImport = true;
 379         for (List<JCTree> l = tree.defs;
 380              l.nonEmpty() &&
 381                  (cdef == null ||
 382                   l.head.hasTag(IMPORT) || l.head.hasTag(PACKAGEDEF));
 383              l = l.tail) {
 384             if (l.head.hasTag(IMPORT)) {
 385                 JCImport imp = (JCImport)l.head;
 386                 Name name = TreeInfo.name(imp.qualid);
 387                 if (name == name.table.names.asterisk ||
 388                         cdef == null ||
 389                         isUsed(TreeInfo.symbol(imp.qualid), cdef)) {
 390                     if (firstImport) {
 391                         firstImport = false;
 392                         println();
 393                     }
 394                     printStat(imp);
 395                 }
 396             } else {
 397                 printStat(l.head);
 398             }
 399         }
 400         if (cdef != null) {
 401             printStat(cdef);
 402             println();
 403         }
 404     }
 405     // where
 406     boolean isUsed(final Symbol t, JCTree cdef) {
 407         class UsedVisitor extends TreeScanner {
 408             public void scan(JCTree tree) {
 409                 if (tree!=null && !result) tree.accept(this);
 410             }
 411             boolean result = false;
 412             public void visitIdent(JCIdent tree) {
 413                 if (tree.sym == t) result = true;
 414             }
 415         }
 416         UsedVisitor v = new UsedVisitor();
 417         v.scan(cdef);
 418         return v.result;
 419     }
 420 
 421     /**************************************************************************
 422      * Visitor methods
 423      *************************************************************************/
 424 
 425     public void visitTopLevel(JCCompilationUnit tree) {
 426         try {
 427             printUnit(tree, null);
 428         } catch (IOException e) {
 429             throw new UncheckedIOException(e);
 430         }
 431     }
 432 
 433     public void visitPackageDef(JCPackageDecl tree) {
 434         try {
 435             printDocComment(tree);
 436             printAnnotations(tree.annotations);
 437             if (tree.pid != null) {
 438                 print("package ");
 439                 printExpr(tree.pid);
 440                 print(";");
 441                 println();
 442             }
 443         } catch (IOException e) {
 444             throw new UncheckedIOException(e);
 445         }
 446     }
 447 
 448     @Override
 449     public void visitModuleDef(JCModuleDecl tree) {
 450         try {
 451             printDocComment(tree);
 452             printAnnotations(tree.mods.annotations);
 453             if (tree.getModuleType() == ModuleKind.OPEN) {
 454                 print("open ");
 455             }
 456             print("module ");
 457             printExpr(tree.qualId);
 458             if (tree.directives == null) {
 459                 print(";");
 460             } else {
 461                 print(" ");
 462                 printBlock(tree.directives);
 463             }
 464             println();
 465         } catch (IOException e) {
 466             throw new UncheckedIOException(e);
 467         }
 468     }
 469 
 470     @Override
 471     public void visitExports(JCExports tree) {
 472         try {
 473             print("exports ");
 474             printExpr(tree.qualid);
 475             if (tree.moduleNames != null) {
 476                 print(" to ");
 477                 printExprs(tree.moduleNames);
 478             }
 479             print(";");
 480         } catch (IOException e) {
 481             throw new UncheckedIOException(e);
 482         }
 483     }
 484 
 485     @Override
 486     public void visitOpens(JCOpens tree) {
 487         try {
 488             print("opens ");
 489             printExpr(tree.qualid);
 490             if (tree.moduleNames != null) {
 491                 print(" to ");
 492                 printExprs(tree.moduleNames);
 493             }
 494             print(";");
 495         } catch (IOException e) {
 496             throw new UncheckedIOException(e);
 497         }
 498     }
 499 
 500     @Override
 501     public void visitProvides(JCProvides tree) {
 502         try {
 503             print("provides ");
 504             printExpr(tree.serviceName);
 505             print(" with ");
 506             printExprs(tree.implNames);
 507             print(";");
 508         } catch (IOException e) {
 509             throw new UncheckedIOException(e);
 510         }
 511     }
 512 
 513     @Override
 514     public void visitRequires(JCRequires tree) {
 515         try {
 516             print("requires ");
 517             if (tree.isStaticPhase)
 518                 print("static ");
 519             if (tree.isTransitive)
 520                 print("transitive ");
 521             printExpr(tree.moduleName);
 522             print(";");
 523         } catch (IOException e) {
 524             throw new UncheckedIOException(e);
 525         }
 526     }
 527 
 528     @Override
 529     public void visitUses(JCUses tree) {
 530         try {
 531             print("uses ");
 532             printExpr(tree.qualid);
 533             print(";");
 534         } catch (IOException e) {
 535             throw new UncheckedIOException(e);
 536         }
 537     }
 538 
 539     public void visitImport(JCImport tree) {
 540         try {
 541             print("import ");
 542             if (tree.staticImport) print("static ");
 543             printExpr(tree.qualid);
 544             print(";");
 545             println();
 546         } catch (IOException e) {
 547             throw new UncheckedIOException(e);
 548         }
 549     }
 550 
 551     public void visitClassDef(JCClassDecl tree) {
 552         try {
 553             println(); align();
 554             printDocComment(tree);
 555             printAnnotations(tree.mods.annotations);
 556             printFlags(tree.mods.flags & ~INTERFACE);
 557             Name enclClassNamePrev = enclClassName;
 558             enclClassName = tree.name;
 559             if ((tree.mods.flags & INTERFACE) != 0) {
 560                 print("interface " + tree.name);
 561                 printTypeParameters(tree.typarams);
 562                 if (tree.implementing.nonEmpty()) {
 563                     print(" extends ");
 564                     printExprs(tree.implementing);
 565                 }
 566                 if (tree.permitting.nonEmpty()) {
 567                     print(" permits ");
 568                     printExprs(tree.permitting);
 569                 }
 570             } else {
 571                 if ((tree.mods.flags & ENUM) != 0)
 572                     print("enum " + tree.name);
 573                 else
 574                     print("class " + tree.name);
 575                 printTypeParameters(tree.typarams);
 576                 if (tree.extending != null) {
 577                     print(" extends ");
 578                     printExpr(tree.extending);
 579                 }
 580                 if (tree.implementing.nonEmpty()) {
 581                     print(" implements ");
 582                     printExprs(tree.implementing);
 583                 }
 584                 if (tree.permitting.nonEmpty()) {
 585                     print(" permits ");
 586                     printExprs(tree.permitting);
 587                 }
 588             }
 589             print(" ");
 590             if ((tree.mods.flags & ENUM) != 0) {
 591                 printEnumBody(tree.defs);
 592             } else {
 593                 printBlock(tree.defs);
 594             }
 595             enclClassName = enclClassNamePrev;
 596         } catch (IOException e) {
 597             throw new UncheckedIOException(e);
 598         }
 599     }
 600 
 601     public void visitMethodDef(JCMethodDecl tree) {
 602         try {
 603             // when producing source output, omit anonymous constructors
 604             if (tree.name == tree.name.table.names.init &&
 605                     enclClassName == null &&
 606                     sourceOutput) return;
 607             println(); align();
 608             printDocComment(tree);
 609             printExpr(tree.mods);
 610             printTypeParameters(tree.typarams);
 611             if (tree.name == tree.name.table.names.init) {
 612                 print(enclClassName != null ? enclClassName : tree.name);
 613             } else {
 614                 printExpr(tree.restype);
 615                 print(" " + tree.name);
 616             }
 617             print("(");
 618             if (tree.recvparam!=null) {
 619                 printExpr(tree.recvparam);
 620                 if (tree.params.size() > 0) {
 621                     print(", ");
 622                 }
 623             }
 624             printExprs(tree.params);
 625             print(")");
 626             if (tree.thrown.nonEmpty()) {
 627                 print(" throws ");
 628                 printExprs(tree.thrown);
 629             }
 630             if (tree.defaultValue != null) {
 631                 print(" default ");
 632                 printExpr(tree.defaultValue);
 633             }
 634             if (tree.body != null) {
 635                 print(" ");
 636                 printStat(tree.body);
 637             } else {
 638                 print(";");
 639             }
 640         } catch (IOException e) {
 641             throw new UncheckedIOException(e);
 642         }
 643     }
 644 
 645     public void visitVarDef(JCVariableDecl tree) {
 646         try {
 647             if (docComments != null && docComments.hasComment(tree)) {
 648                 println(); align();
 649             }
 650             printDocComment(tree);
 651             if ((tree.mods.flags & ENUM) != 0) {
 652                 print("/*public static final*/ ");
 653                 print(tree.name);
 654                 if (tree.init != null) {
 655                     if (tree.init.hasTag(NEWCLASS)) {
 656                         JCNewClass init = (JCNewClass) tree.init;
 657                         if (sourceOutput) {
 658                             print(" /*enum*/ ");
 659                             if (init.args != null && init.args.nonEmpty()) {
 660                                 print("(");
 661                                 print(init.args);
 662                                 print(")");
 663                             }
 664                             if (init.def != null && init.def.defs != null) {
 665                                 print(" ");
 666                                 printBlock(init.def.defs);
 667                             }
 668                             return;
 669                         }else {
 670                             print(" /* = ");
 671                             print("new ");
 672                             if (init.def != null && init.def.mods.annotations.nonEmpty()) {
 673                                 printTypeAnnotations(init.def.mods.annotations);
 674                             }
 675                             printExpr(init.clazz);
 676                             print("(");
 677                             printExprs(init.args);
 678                             print(")");
 679                             print(" */");
 680                             print(" /*enum*/ ");
 681                             if (init.args != null && init.args.nonEmpty()) {
 682                                 print("(");
 683                                 printExprs(init.args);
 684                                 print(")");
 685                             }
 686                             if (init.def != null && init.def.defs != null) {
 687                                 print(" ");
 688                                 printBlock(init.def.defs);
 689                             }
 690                             return;
 691                         }
 692                     }
 693                     print(" /* = ");
 694                     printExpr(tree.init);
 695                     print(" */");
 696                 }
 697             } else {
 698                 printExpr(tree.mods);
 699                 if ((tree.mods.flags & VARARGS) != 0) {
 700                     JCTree vartype = tree.vartype;
 701                     List<JCAnnotation> tas = null;
 702                     if (vartype instanceof JCAnnotatedType annotatedType) {
 703                         tas = annotatedType.annotations;
 704                         vartype = annotatedType.underlyingType;
 705                     }
 706                     printExpr(((JCArrayTypeTree) vartype).elemtype);
 707                     if (tas != null) {
 708                         print(' ');
 709                         printTypeAnnotations(tas);
 710                     }
 711                     print("... " + tree.name);
 712                 } else {
 713                     printExpr(tree.vartype);
 714                     print(" " + tree.name);
 715                 }
 716                 if (tree.init != null) {
 717                     print(" = ");
 718                     printExpr(tree.init);
 719                 }
 720                 if (prec == TreeInfo.notExpression) print(";");
 721             }
 722         } catch (IOException e) {
 723             throw new UncheckedIOException(e);
 724         }
 725     }
 726 
 727     public void visitSkip(JCSkip tree) {
 728         try {
 729             print(";");
 730         } catch (IOException e) {
 731             throw new UncheckedIOException(e);
 732         }
 733     }
 734 
 735     public void visitBlock(JCBlock tree) {
 736         try {
 737             printFlags(tree.flags);
 738             printBlock(tree.stats);
 739         } catch (IOException e) {
 740             throw new UncheckedIOException(e);
 741         }
 742     }
 743 
 744     public void visitDoLoop(JCDoWhileLoop tree) {
 745         try {
 746             print("do ");
 747             printStat(tree.body);
 748             align();
 749             print(" while ");
 750             if (tree.cond.hasTag(PARENS)) {
 751                 printExpr(tree.cond);
 752             } else {
 753                 print("(");
 754                 printExpr(tree.cond);
 755                 print(")");
 756             }
 757             print(";");
 758         } catch (IOException e) {
 759             throw new UncheckedIOException(e);
 760         }
 761     }
 762 
 763     public void visitWhileLoop(JCWhileLoop tree) {
 764         try {
 765             print("while ");
 766             if (tree.cond.hasTag(PARENS)) {
 767                 printExpr(tree.cond);
 768             } else {
 769                 print("(");
 770                 printExpr(tree.cond);
 771                 print(")");
 772             }
 773             print(" ");
 774             printStat(tree.body);
 775         } catch (IOException e) {
 776             throw new UncheckedIOException(e);
 777         }
 778     }
 779 
 780     public void visitForLoop(JCForLoop tree) {
 781         try {
 782             print("for (");
 783             if (tree.init.nonEmpty()) {
 784                 if (tree.init.head.hasTag(VARDEF)) {
 785                     printExpr(tree.init.head);
 786                     for (List<JCStatement> l = tree.init.tail; l.nonEmpty(); l = l.tail) {
 787                         JCVariableDecl vdef = (JCVariableDecl)l.head;
 788                         print(", " + vdef.name);
 789                         if (vdef.init != null) {
 790                             print(" = ");
 791                             printExpr(vdef.init);
 792                         }
 793                     }
 794                 } else {
 795                     printExprs(tree.init);
 796                 }
 797             }
 798             print("; ");
 799             if (tree.cond != null) printExpr(tree.cond);
 800             print("; ");
 801             printExprs(tree.step);
 802             print(") ");
 803             printStat(tree.body);
 804         } catch (IOException e) {
 805             throw new UncheckedIOException(e);
 806         }
 807     }
 808 
 809     public void visitForeachLoop(JCEnhancedForLoop tree) {
 810         try {
 811             print("for (");
 812             printExpr(tree.var);
 813             print(" : ");
 814             printExpr(tree.expr);
 815             print(") ");
 816             printStat(tree.body);
 817         } catch (IOException e) {
 818             throw new UncheckedIOException(e);
 819         }
 820     }
 821 
 822     public void visitLabelled(JCLabeledStatement tree) {
 823         try {
 824             print(tree.label + ": ");
 825             printStat(tree.body);
 826         } catch (IOException e) {
 827             throw new UncheckedIOException(e);
 828         }
 829     }
 830 
 831     public void visitSwitch(JCSwitch tree) {
 832         try {
 833             print("switch ");
 834             if (tree.selector.hasTag(PARENS)) {
 835                 printExpr(tree.selector);
 836             } else {
 837                 print("(");
 838                 printExpr(tree.selector);
 839                 print(")");
 840             }
 841             print(" {");
 842             println();
 843             printStats(tree.cases);
 844             align();
 845             print("}");
 846         } catch (IOException e) {
 847             throw new UncheckedIOException(e);
 848         }
 849     }
 850 
 851     public void visitCase(JCCase tree) {
 852         try {
 853             if (tree.labels.size() == 1 && tree.labels.get(0).hasTag(DEFAULTCASELABEL)) {
 854                 print("default");
 855             } else {
 856                 print("case ");
 857                 printExprs(tree.labels);
 858             }
 859             if (tree.caseKind == JCCase.STATEMENT) {
 860                 print(":");
 861                 println();
 862                 indent();
 863                 printStats(tree.stats);
 864                 undent();
 865                 align();
 866             } else {
 867                 print(" -> ");
 868                 if (tree.stats.size() == 1) {
 869                     printStat(tree.stats.head);
 870                 } else {
 871                     printBlock(tree.stats);
 872                 }
 873             }
 874         } catch (IOException e) {
 875             throw new UncheckedIOException(e);
 876         }
 877     }
 878 
 879     @Override
 880     public void visitDefaultCaseLabel(JCTree.JCDefaultCaseLabel that) {
 881         try {
 882             print("default");
 883         } catch (IOException e) {
 884             throw new UncheckedIOException(e);
 885         }
 886     }
 887 
 888     public void visitSwitchExpression(JCSwitchExpression tree) {
 889         try {
 890             print("switch ");
 891             if (tree.selector.hasTag(PARENS)) {
 892                 printExpr(tree.selector);
 893             } else {
 894                 print("(");
 895                 printExpr(tree.selector);
 896                 print(")");
 897             }
 898             print(" {");
 899             println();
 900             printStats(tree.cases);
 901             align();
 902             print("}");
 903         } catch (IOException e) {
 904             throw new UncheckedIOException(e);
 905         }
 906     }
 907 
 908     public void visitBindingPattern(JCBindingPattern patt) {
 909         try {
 910             printExpr(patt.var);
 911         } catch (IOException e) {
 912             throw new UncheckedIOException(e);
 913         }
 914     }
 915 
 916     @Override
 917     public void visitParenthesizedPattern(JCParenthesizedPattern patt) {
 918         try {
 919             print("(");
 920             printExpr(patt.pattern);
 921             print(")");
 922         } catch (IOException e) {
 923             throw new UncheckedIOException(e);
 924         }
 925     }
 926 
 927     @Override
 928     public void visitGuardPattern(JCGuardPattern patt) {
 929         try {
 930             printExpr(patt.patt);
 931             print(" && ");
 932             printExpr(patt.expr);
 933         } catch (IOException e) {
 934             throw new UncheckedIOException(e);
 935         }
 936     }
 937 
 938     public void visitSynchronized(JCSynchronized tree) {
 939         try {
 940             print("synchronized ");
 941             if (tree.lock.hasTag(PARENS)) {
 942                 printExpr(tree.lock);
 943             } else {
 944                 print("(");
 945                 printExpr(tree.lock);
 946                 print(")");
 947             }
 948             print(" ");
 949             printStat(tree.body);
 950         } catch (IOException e) {
 951             throw new UncheckedIOException(e);
 952         }
 953     }
 954 
 955     public void visitTry(JCTry tree) {
 956         try {
 957             print("try ");
 958             if (tree.resources.nonEmpty()) {
 959                 print("(");
 960                 boolean first = true;
 961                 for (JCTree var : tree.resources) {
 962                     if (!first) {
 963                         println();
 964                         indent();
 965                     }
 966                     printStat(var);
 967                     first = false;
 968                 }
 969                 print(") ");
 970             }
 971             printStat(tree.body);
 972             for (List<JCCatch> l = tree.catchers; l.nonEmpty(); l = l.tail) {
 973                 printStat(l.head);
 974             }
 975             if (tree.finalizer != null) {
 976                 print(" finally ");
 977                 printStat(tree.finalizer);
 978             }
 979         } catch (IOException e) {
 980             throw new UncheckedIOException(e);
 981         }
 982     }
 983 
 984     public void visitCatch(JCCatch tree) {
 985         try {
 986             print(" catch (");
 987             printExpr(tree.param);
 988             print(") ");
 989             printStat(tree.body);
 990         } catch (IOException e) {
 991             throw new UncheckedIOException(e);
 992         }
 993     }
 994 
 995     public void visitConditional(JCConditional tree) {
 996         try {
 997             open(prec, TreeInfo.condPrec);
 998             printExpr(tree.cond, TreeInfo.condPrec + 1);
 999             print(" ? ");
1000             printExpr(tree.truepart);
1001             print(" : ");
1002             printExpr(tree.falsepart, TreeInfo.condPrec);
1003             close(prec, TreeInfo.condPrec);
1004         } catch (IOException e) {
1005             throw new UncheckedIOException(e);
1006         }
1007     }
1008 
1009     public void visitIf(JCIf tree) {
1010         try {
1011             print("if ");
1012             if (tree.cond.hasTag(PARENS)) {
1013                 printExpr(tree.cond);
1014             } else {
1015                 print("(");
1016                 printExpr(tree.cond);
1017                 print(")");
1018             }
1019             print(" ");
1020             printStat(tree.thenpart);
1021             if (tree.elsepart != null) {
1022                 print(" else ");
1023                 printStat(tree.elsepart);
1024             }
1025         } catch (IOException e) {
1026             throw new UncheckedIOException(e);
1027         }
1028     }
1029 
1030     public void visitExec(JCExpressionStatement tree) {
1031         try {
1032             printExpr(tree.expr);
1033             if (prec == TreeInfo.notExpression) print(";");
1034         } catch (IOException e) {
1035             throw new UncheckedIOException(e);
1036         }
1037     }
1038 
1039     public void visitBreak(JCBreak tree) {
1040         try {
1041             print("break");
1042             if (tree.label != null) print(" " + tree.label);
1043             print(";");
1044         } catch (IOException e) {
1045             throw new UncheckedIOException(e);
1046         }
1047     }
1048 
1049     public void visitYield(JCYield tree) {
1050         try {
1051             print("yield");
1052             print(" ");
1053             printExpr(tree.value);
1054             print(";");
1055         } catch (IOException e) {
1056             throw new UncheckedIOException(e);
1057         }
1058     }
1059 
1060     public void visitContinue(JCContinue tree) {
1061         try {
1062             print("continue");
1063             if (tree.label != null) print(" " + tree.label);
1064             print(";");
1065         } catch (IOException e) {
1066             throw new UncheckedIOException(e);
1067         }
1068     }
1069 
1070     public void visitReturn(JCReturn tree) {
1071         try {
1072             print("return");
1073             if (tree.expr != null) {
1074                 print(" ");
1075                 printExpr(tree.expr);
1076             }
1077             print(";");
1078         } catch (IOException e) {
1079             throw new UncheckedIOException(e);
1080         }
1081     }
1082 
1083     public void visitThrow(JCThrow tree) {
1084         try {
1085             print("throw ");
1086             printExpr(tree.expr);
1087             print(";");
1088         } catch (IOException e) {
1089             throw new UncheckedIOException(e);
1090         }
1091     }
1092 
1093     public void visitAssert(JCAssert tree) {
1094         try {
1095             print("assert ");
1096             printExpr(tree.cond);
1097             if (tree.detail != null) {
1098                 print(" : ");
1099                 printExpr(tree.detail);
1100             }
1101             print(";");
1102         } catch (IOException e) {
1103             throw new UncheckedIOException(e);
1104         }
1105     }
1106 
1107     public void visitApply(JCMethodInvocation tree) {
1108         try {
1109             if (!tree.typeargs.isEmpty()) {
1110                 if (tree.meth.hasTag(SELECT)) {
1111                     JCFieldAccess left = (JCFieldAccess)tree.meth;
1112                     printExpr(left.selected);
1113                     print(".<");
1114                     printExprs(tree.typeargs);
1115                     print(">" + left.name);
1116                 } else {
1117                     print("<");
1118                     printExprs(tree.typeargs);
1119                     print(">");
1120                     printExpr(tree.meth);
1121                 }
1122             } else {
1123                 printExpr(tree.meth);
1124             }
1125             print("(");
1126             printExprs(tree.args);
1127             print(")");
1128         } catch (IOException e) {
1129             throw new UncheckedIOException(e);
1130         }
1131     }
1132 
1133     public void visitNewClass(JCNewClass tree) {
1134         try {
1135             if (tree.encl != null) {
1136                 printExpr(tree.encl);
1137                 print(".");
1138             }
1139             print("new ");
1140             if (!tree.typeargs.isEmpty()) {
1141                 print("<");
1142                 printExprs(tree.typeargs);
1143                 print(">");
1144             }
1145             if (tree.def != null && tree.def.mods.annotations.nonEmpty()) {
1146                 printTypeAnnotations(tree.def.mods.annotations);
1147             }
1148             printExpr(tree.clazz);
1149             print("(");
1150             printExprs(tree.args);
1151             print(")");
1152             if (tree.def != null) {
1153                 Name enclClassNamePrev = enclClassName;
1154                 enclClassName =
1155                         tree.def.name != null ? tree.def.name :
1156                             tree.type != null && tree.type.tsym.name != tree.type.tsym.name.table.names.empty
1157                                 ? tree.type.tsym.name : null;
1158                 if ((tree.def.mods.flags & Flags.ENUM) != 0) print("/*enum*/");
1159                 printBlock(tree.def.defs);
1160                 enclClassName = enclClassNamePrev;
1161             }
1162         } catch (IOException e) {
1163             throw new UncheckedIOException(e);
1164         }
1165     }
1166 
1167     public void visitNewArray(JCNewArray tree) {
1168         try {
1169             if (tree.elemtype != null) {
1170                 print("new ");
1171                 JCTree elem = tree.elemtype;
1172                 printBaseElementType(elem);
1173 
1174                 if (!tree.annotations.isEmpty()) {
1175                     print(' ');
1176                     printTypeAnnotations(tree.annotations);
1177                 }
1178                 if (tree.elems != null) {
1179                     print("[]");
1180                 }
1181 
1182                 int i = 0;
1183                 List<List<JCAnnotation>> da = tree.dimAnnotations;
1184                 for (List<JCExpression> l = tree.dims; l.nonEmpty(); l = l.tail) {
1185                     if (da.size() > i && !da.get(i).isEmpty()) {
1186                         print(' ');
1187                         printTypeAnnotations(da.get(i));
1188                     }
1189                     print("[");
1190                     i++;
1191                     printExpr(l.head);
1192                     print("]");
1193                 }
1194                 printBrackets(elem);
1195             }
1196             if (tree.elems != null) {
1197                 print("{");
1198                 printExprs(tree.elems);
1199                 print("}");
1200             }
1201         } catch (IOException e) {
1202             throw new UncheckedIOException(e);
1203         }
1204     }
1205 
1206     public void visitLambda(JCLambda tree) {
1207         try {
1208             print("(");
1209             if (tree.paramKind == JCLambda.ParameterKind.EXPLICIT) {
1210                 printExprs(tree.params);
1211             } else {
1212                 String sep = "";
1213                 for (JCVariableDecl param : tree.params) {
1214                     print(sep);
1215                     print(param.name);
1216                     sep = ",";
1217                 }
1218             }
1219             print(")->");
1220             printExpr(tree.body);
1221         } catch (IOException e) {
1222             throw new UncheckedIOException(e);
1223         }
1224     }
1225 
1226     public void visitParens(JCParens tree) {
1227         try {
1228             print("(");
1229             printExpr(tree.expr);
1230             print(")");
1231         } catch (IOException e) {
1232             throw new UncheckedIOException(e);
1233         }
1234     }
1235 
1236     public void visitAssign(JCAssign tree) {
1237         try {
1238             open(prec, TreeInfo.assignPrec);
1239             printExpr(tree.lhs, TreeInfo.assignPrec + 1);
1240             print(" = ");
1241             printExpr(tree.rhs, TreeInfo.assignPrec);
1242             close(prec, TreeInfo.assignPrec);
1243         } catch (IOException e) {
1244             throw new UncheckedIOException(e);
1245         }
1246     }
1247 
1248     public String operatorName(JCTree.Tag tag) {
1249         switch(tag) {
1250             case POS:     return "+";
1251             case NEG:     return "-";
1252             case NOT:     return "!";
1253             case COMPL:   return "~";
1254             case PREINC:  return "++";
1255             case PREDEC:  return "--";
1256             case POSTINC: return "++";
1257             case POSTDEC: return "--";
1258             case NULLCHK: return "<*nullchk*>";
1259             case OR:      return "||";
1260             case AND:     return "&&";
1261             case EQ:      return "==";
1262             case NE:      return "!=";
1263             case LT:      return "<";
1264             case GT:      return ">";
1265             case LE:      return "<=";
1266             case GE:      return ">=";
1267             case BITOR:   return "|";
1268             case BITXOR:  return "^";
1269             case BITAND:  return "&";
1270             case SL:      return "<<";
1271             case SR:      return ">>";
1272             case USR:     return ">>>";
1273             case PLUS:    return "+";
1274             case MINUS:   return "-";
1275             case MUL:     return "*";
1276             case DIV:     return "/";
1277             case MOD:     return "%";
1278             default: throw new Error();
1279         }
1280     }
1281 
1282     public void visitAssignop(JCAssignOp tree) {
1283         try {
1284             open(prec, TreeInfo.assignopPrec);
1285             printExpr(tree.lhs, TreeInfo.assignopPrec + 1);
1286             print(" " + operatorName(tree.getTag().noAssignOp()) + "= ");
1287             printExpr(tree.rhs, TreeInfo.assignopPrec);
1288             close(prec, TreeInfo.assignopPrec);
1289         } catch (IOException e) {
1290             throw new UncheckedIOException(e);
1291         }
1292     }
1293 
1294     public void visitUnary(JCUnary tree) {
1295         try {
1296             int ownprec = TreeInfo.opPrec(tree.getTag());
1297             String opname = operatorName(tree.getTag());
1298             open(prec, ownprec);
1299             if (!tree.getTag().isPostUnaryOp()) {
1300                 print(opname);
1301                 printExpr(tree.arg, ownprec);
1302             } else {
1303                 printExpr(tree.arg, ownprec);
1304                 print(opname);
1305             }
1306             close(prec, ownprec);
1307         } catch (IOException e) {
1308             throw new UncheckedIOException(e);
1309         }
1310     }
1311 
1312     public void visitBinary(JCBinary tree) {
1313         try {
1314             int ownprec = TreeInfo.opPrec(tree.getTag());
1315             String opname = operatorName(tree.getTag());
1316             open(prec, ownprec);
1317             printExpr(tree.lhs, ownprec);
1318             print(" " + opname + " ");
1319             printExpr(tree.rhs, ownprec + 1);
1320             close(prec, ownprec);
1321         } catch (IOException e) {
1322             throw new UncheckedIOException(e);
1323         }
1324     }
1325 
1326     public void visitTypeCast(JCTypeCast tree) {
1327         try {
1328             open(prec, TreeInfo.prefixPrec);
1329             print("(");
1330             printExpr(tree.clazz);
1331             print(")");
1332             printExpr(tree.expr, TreeInfo.prefixPrec);
1333             close(prec, TreeInfo.prefixPrec);
1334         } catch (IOException e) {
1335             throw new UncheckedIOException(e);
1336         }
1337     }
1338 
1339     public void visitTypeTest(JCInstanceOf tree) {
1340         try {
1341             open(prec, TreeInfo.ordPrec);
1342             printExpr(tree.expr, TreeInfo.ordPrec);
1343             print(" instanceof ");
1344             if (tree.pattern instanceof JCPattern) {
1345                 printPattern(tree.pattern);
1346             } else {
1347                 printExpr(tree.getType(), TreeInfo.ordPrec + 1);
1348             }
1349             close(prec, TreeInfo.ordPrec);
1350         } catch (IOException e) {
1351             throw new UncheckedIOException(e);
1352         }
1353     }
1354 
1355     public void visitIndexed(JCArrayAccess tree) {
1356         try {
1357             printExpr(tree.indexed, TreeInfo.postfixPrec);
1358             print("[");
1359             printExpr(tree.index);
1360             print("]");
1361         } catch (IOException e) {
1362             throw new UncheckedIOException(e);
1363         }
1364     }
1365 
1366     public void visitSelect(JCFieldAccess tree) {
1367         try {
1368             printExpr(tree.selected, TreeInfo.postfixPrec);
1369             print("." + tree.name);
1370         } catch (IOException e) {
1371             throw new UncheckedIOException(e);
1372         }
1373     }
1374 
1375     public void visitReference(JCMemberReference tree) {
1376         try {
1377             printExpr(tree.expr);
1378             print("::");
1379             if (tree.typeargs != null) {
1380                 print("<");
1381                 printExprs(tree.typeargs);
1382                 print(">");
1383             }
1384             print(tree.getMode() == ReferenceMode.INVOKE ? tree.name : "new");
1385         } catch (IOException e) {
1386             throw new UncheckedIOException(e);
1387         }
1388     }
1389 
1390     public void visitIdent(JCIdent tree) {
1391         try {
1392             print(tree.name);
1393         } catch (IOException e) {
1394             throw new UncheckedIOException(e);
1395         }
1396     }
1397 
1398     public void visitLiteral(JCLiteral tree) {
1399         try {
1400             switch (tree.typetag) {
1401                 case INT:
1402                     print(tree.value.toString());
1403                     break;
1404                 case LONG:
1405                     print(tree.value + "L");
1406                     break;
1407                 case FLOAT:
1408                     print(tree.value + "F");
1409                     break;
1410                 case DOUBLE:
1411                     print(tree.value.toString());
1412                     break;
1413                 case CHAR:
1414                     print("\'" +
1415                             Convert.quote(
1416                             String.valueOf((char)((Number)tree.value).intValue())) +
1417                             "\'");
1418                     break;
1419                 case BOOLEAN:
1420                     print(((Number)tree.value).intValue() == 1 ? "true" : "false");
1421                     break;
1422                 case BOT:
1423                     print("null");
1424                     break;
1425                 default:
1426                     print("\"" + Convert.quote(tree.value.toString()) + "\"");
1427                     break;
1428             }
1429         } catch (IOException e) {
1430             throw new UncheckedIOException(e);
1431         }
1432     }
1433 
1434     public void visitTypeIdent(JCPrimitiveTypeTree tree) {
1435         try {
1436             switch(tree.typetag) {
1437                 case BYTE:
1438                     print("byte");
1439                     break;
1440                 case CHAR:
1441                     print("char");
1442                     break;
1443                 case SHORT:
1444                     print("short");
1445                     break;
1446                 case INT:
1447                     print("int");
1448                     break;
1449                 case LONG:
1450                     print("long");
1451                     break;
1452                 case FLOAT:
1453                     print("float");
1454                     break;
1455                 case DOUBLE:
1456                     print("double");
1457                     break;
1458                 case BOOLEAN:
1459                     print("boolean");
1460                     break;
1461                 case VOID:
1462                     print("void");
1463                     break;
1464                 default:
1465                     print("error");
1466                     break;
1467             }
1468         } catch (IOException e) {
1469             throw new UncheckedIOException(e);
1470         }
1471     }
1472 
1473     public void visitTypeArray(JCArrayTypeTree tree) {
1474         try {
1475             printBaseElementType(tree);
1476             printBrackets(tree);
1477         } catch (IOException e) {
1478             throw new UncheckedIOException(e);
1479         }
1480     }
1481 
1482     // Prints the inner element type of a nested array
1483     private void printBaseElementType(JCTree tree) throws IOException {
1484         printExpr(TreeInfo.innermostType(tree, false));
1485     }
1486 
1487     // prints the brackets of a nested array in reverse order
1488     // tree is either JCArrayTypeTree or JCAnnotatedTypeTree
1489     private void printBrackets(JCTree tree) throws IOException {
1490         JCTree elem = tree;
1491         while (true) {
1492             if (elem.hasTag(ANNOTATED_TYPE)) {
1493                 JCAnnotatedType atype = (JCAnnotatedType) elem;
1494                 elem = atype.underlyingType;
1495                 if (elem.hasTag(TYPEARRAY)) {
1496                     print(' ');
1497                     printTypeAnnotations(atype.annotations);
1498                 }
1499             }
1500             if (elem.hasTag(TYPEARRAY)) {
1501                 print("[]");
1502                 elem = ((JCArrayTypeTree)elem).elemtype;
1503             } else {
1504                 break;
1505             }
1506         }
1507     }
1508 
1509     public void visitTypeApply(JCTypeApply tree) {
1510         try {
1511             printExpr(tree.clazz);
1512             print("<");
1513             printExprs(tree.arguments);
1514             print(">");
1515         } catch (IOException e) {
1516             throw new UncheckedIOException(e);
1517         }
1518     }
1519 
1520     public void visitTypeUnion(JCTypeUnion tree) {
1521         try {
1522             printExprs(tree.alternatives, " | ");
1523         } catch (IOException e) {
1524             throw new UncheckedIOException(e);
1525         }
1526     }
1527 
1528     public void visitTypeIntersection(JCTypeIntersection tree) {
1529         try {
1530             printExprs(tree.bounds, " & ");
1531         } catch (IOException e) {
1532             throw new UncheckedIOException(e);
1533         }
1534     }
1535 
1536     public void visitTypeParameter(JCTypeParameter tree) {
1537         try {
1538             if (tree.annotations.nonEmpty()) {
1539                 this.printTypeAnnotations(tree.annotations);
1540             }
1541             print(tree.name);
1542             if (tree.bounds.nonEmpty()) {
1543                 print(" extends ");
1544                 printExprs(tree.bounds, " & ");
1545             }
1546         } catch (IOException e) {
1547             throw new UncheckedIOException(e);
1548         }
1549     }
1550 
1551     @Override
1552     public void visitWildcard(JCWildcard tree) {
1553         try {
1554             print(tree.kind);
1555             if (tree.kind.kind != BoundKind.UNBOUND)
1556                 printExpr(tree.inner);
1557         } catch (IOException e) {
1558             throw new UncheckedIOException(e);
1559         }
1560     }
1561 
1562     @Override
1563     public void visitTypeBoundKind(TypeBoundKind tree) {
1564         try {
1565             print(String.valueOf(tree.kind));
1566         } catch (IOException e) {
1567             throw new UncheckedIOException(e);
1568         }
1569     }
1570 
1571     public void visitErroneous(JCErroneous tree) {
1572         try {
1573             print("(ERROR)");
1574         } catch (IOException e) {
1575             throw new UncheckedIOException(e);
1576         }
1577     }
1578 
1579     public void visitLetExpr(LetExpr tree) {
1580         try {
1581             print("(let " + tree.defs + " in " + tree.expr + ")");
1582         } catch (IOException e) {
1583             throw new UncheckedIOException(e);
1584         }
1585     }
1586 
1587     public void visitModifiers(JCModifiers mods) {
1588         try {
1589             printAnnotations(mods.annotations);
1590             printFlags(mods.flags);
1591         } catch (IOException e) {
1592             throw new UncheckedIOException(e);
1593         }
1594     }
1595 
1596     public void visitAnnotation(JCAnnotation tree) {
1597         try {
1598             print("@");
1599             printExpr(tree.annotationType);
1600             if (!tree.args.isEmpty()) {
1601                 print("(");
1602                 printExprs(tree.args);
1603                 print(")");
1604             }
1605         } catch (IOException e) {
1606             throw new UncheckedIOException(e);
1607         }
1608     }
1609 
1610     public void visitAnnotatedType(JCAnnotatedType tree) {
1611         try {
1612             if (tree.underlyingType.hasTag(SELECT)) {
1613                 JCFieldAccess access = (JCFieldAccess) tree.underlyingType;
1614                 printExpr(access.selected, TreeInfo.postfixPrec);
1615                 print(".");
1616                 printTypeAnnotations(tree.annotations);
1617                 print(access.name);
1618             } else if (tree.underlyingType.hasTag(TYPEARRAY)) {
1619                 printBaseElementType(tree);
1620                 printBrackets(tree);
1621             } else {
1622                 printTypeAnnotations(tree.annotations);
1623                 printExpr(tree.underlyingType);
1624             }
1625         } catch (IOException e) {
1626             throw new UncheckedIOException(e);
1627         }
1628     }
1629 
1630     public void visitTree(JCTree tree) {
1631         try {
1632             print("(UNKNOWN: " + tree.getTag() + ")");
1633             println();
1634         } catch (IOException e) {
1635             throw new UncheckedIOException(e);
1636         }
1637     }
1638 
1639 }