1 /*
   2  * Copyright (c) 2006, 2016, 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 com.sun.source.tree.*;
  29 import com.sun.source.tree.Tree.Kind;
  30 import com.sun.tools.javac.tree.JCTree.*;
  31 import com.sun.tools.javac.util.DefinedBy;
  32 import com.sun.tools.javac.util.DefinedBy.Api;
  33 import com.sun.tools.javac.util.List;
  34 import com.sun.tools.javac.util.ListBuffer;
  35 
  36 /**
  37  * Creates a copy of a tree, using a given TreeMaker.
  38  * Names, literal values, etc are shared with the original.
  39  *
  40  *  <p><b>This is NOT part of any supported API.
  41  *  If you write code that depends on this, you do so at your own risk.
  42  *  This code and its internal interfaces are subject to change or
  43  *  deletion without notice.</b>
  44  */
  45 public class TreeCopier<P> implements TreeVisitor<JCTree,P> {
  46     private TreeMaker M;
  47 
  48     /** Creates a new instance of TreeCopier */
  49     public TreeCopier(TreeMaker M) {
  50         this.M = M;
  51     }
  52 
  53     public <T extends JCTree> T copy(T tree) {
  54         return copy(tree, null);
  55     }
  56 
  57     @SuppressWarnings("unchecked")
  58     public <T extends JCTree> T copy(T tree, P p) {
  59         if (tree == null)
  60             return null;
  61         return (T) (tree.accept(this, p));
  62     }
  63 
  64     public <T extends JCTree> List<T> copy(List<T> trees) {
  65         return copy(trees, null);
  66     }
  67 
  68     public <T extends JCTree> List<T> copy(List<T> trees, P p) {
  69         if (trees == null)
  70             return null;
  71         ListBuffer<T> lb = new ListBuffer<>();
  72         for (T tree: trees)
  73             lb.append(copy(tree, p));
  74         return lb.toList();
  75     }
  76 
  77     @DefinedBy(Api.COMPILER_TREE)
  78     public JCTree visitAnnotatedType(AnnotatedTypeTree node, P p) {
  79         JCAnnotatedType t = (JCAnnotatedType) node;
  80         List<JCAnnotation> annotations = copy(t.annotations, p);
  81         JCExpression underlyingType = copy(t.underlyingType, p);
  82         return M.at(t.pos).AnnotatedType(annotations, underlyingType);
  83     }
  84 
  85     @DefinedBy(Api.COMPILER_TREE)
  86     public JCTree visitAnnotation(AnnotationTree node, P p) {
  87         JCAnnotation t = (JCAnnotation) node;
  88         JCTree annotationType = copy(t.annotationType, p);
  89         List<JCExpression> args = copy(t.args, p);
  90         if (t.getKind() == Tree.Kind.TYPE_ANNOTATION) {
  91             JCAnnotation newTA = M.at(t.pos).TypeAnnotation(annotationType, args);
  92             newTA.attribute = t.attribute;
  93             return newTA;
  94         } else {
  95             JCAnnotation newT = M.at(t.pos).Annotation(annotationType, args);
  96             newT.attribute = t.attribute;
  97             return newT;
  98         }
  99     }
 100 
 101     @DefinedBy(Api.COMPILER_TREE)
 102     public JCTree visitAssert(AssertTree node, P p) {
 103         JCAssert t = (JCAssert) node;
 104         JCExpression cond = copy(t.cond, p);
 105         JCExpression detail = copy(t.detail, p);
 106         return M.at(t.pos).Assert(cond, detail);
 107     }
 108 
 109     @DefinedBy(Api.COMPILER_TREE)
 110     public JCTree visitAssignment(AssignmentTree node, P p) {
 111         JCAssign t = (JCAssign) node;
 112         JCExpression lhs = copy(t.lhs, p);
 113         JCExpression rhs = copy(t.rhs, p);
 114         return M.at(t.pos).Assign(lhs, rhs);
 115     }
 116 
 117     @DefinedBy(Api.COMPILER_TREE)
 118     public JCTree visitCompoundAssignment(CompoundAssignmentTree node, P p) {
 119         JCAssignOp t = (JCAssignOp) node;
 120         JCTree lhs = copy(t.lhs, p);
 121         JCTree rhs = copy(t.rhs, p);
 122         return M.at(t.pos).Assignop(t.getTag(), lhs, rhs);
 123     }
 124 
 125     @DefinedBy(Api.COMPILER_TREE)
 126     public JCTree visitBinary(BinaryTree node, P p) {
 127         JCBinary t = (JCBinary) node;
 128         JCExpression lhs = copy(t.lhs, p);
 129         JCExpression rhs = copy(t.rhs, p);
 130         return M.at(t.pos).Binary(t.getTag(), lhs, rhs);
 131     }
 132 
 133     @DefinedBy(Api.COMPILER_TREE)
 134     public JCTree visitBlock(BlockTree node, P p) {
 135         JCBlock t = (JCBlock) node;
 136         List<JCStatement> stats = copy(t.stats, p);
 137         return M.at(t.pos).Block(t.flags, stats);
 138     }
 139 
 140     @DefinedBy(Api.COMPILER_TREE)
 141     public JCTree visitBreak(BreakTree node, P p) {
 142         JCBreak t = (JCBreak) node;
 143         return M.at(t.pos).Break(t.label);
 144     }
 145 
 146     @DefinedBy(Api.COMPILER_TREE)
 147     public JCTree visitCase(CaseTree node, P p) {
 148         JCCase t = (JCCase) node;
 149         JCExpression pat = copy(t.pat, p);
 150         List<JCStatement> stats = copy(t.stats, p);
 151         return M.at(t.pos).Case(pat, stats);
 152     }
 153 
 154     @DefinedBy(Api.COMPILER_TREE)
 155     public JCTree visitCatch(CatchTree node, P p) {
 156         JCCatch t = (JCCatch) node;
 157         JCVariableDecl param = copy(t.param, p);
 158         JCBlock body = copy(t.body, p);
 159         return M.at(t.pos).Catch(param, body);
 160     }
 161 
 162     @DefinedBy(Api.COMPILER_TREE)
 163     public JCTree visitClass(ClassTree node, P p) {
 164         JCClassDecl t = (JCClassDecl) node;
 165         JCModifiers mods = copy(t.mods, p);
 166         List<JCTypeParameter> typarams = copy(t.typarams, p);
 167         JCExpression extending = copy(t.extending, p);
 168         List<JCExpression> implementing = copy(t.implementing, p);
 169         List<JCTree> defs = copy(t.defs, p);
 170         return M.at(t.pos).ClassDef(mods, t.name, typarams, extending, implementing, defs);
 171     }
 172 
 173     @DefinedBy(Api.COMPILER_TREE)
 174     public JCTree visitConditionalExpression(ConditionalExpressionTree node, P p) {
 175         JCConditional t = (JCConditional) node;
 176         JCExpression cond = copy(t.cond, p);
 177         JCExpression truepart = copy(t.truepart, p);
 178         JCExpression falsepart = copy(t.falsepart, p);
 179         return M.at(t.pos).Conditional(cond, truepart, falsepart);
 180     }
 181 
 182     @DefinedBy(Api.COMPILER_TREE)
 183     public JCTree visitContinue(ContinueTree node, P p) {
 184         JCContinue t = (JCContinue) node;
 185         return M.at(t.pos).Continue(t.label);
 186     }
 187 
 188     @DefinedBy(Api.COMPILER_TREE)
 189     public JCTree visitDoWhileLoop(DoWhileLoopTree node, P p) {
 190         JCDoWhileLoop t = (JCDoWhileLoop) node;
 191         JCStatement body = copy(t.body, p);
 192         JCExpression cond = copy(t.cond, p);
 193         return M.at(t.pos).DoLoop(body, cond);
 194     }
 195 
 196     @DefinedBy(Api.COMPILER_TREE)
 197     public JCTree visitErroneous(ErroneousTree node, P p) {
 198         JCErroneous t = (JCErroneous) node;
 199         List<? extends JCTree> errs = copy(t.errs, p);
 200         return M.at(t.pos).Erroneous(errs);
 201     }
 202 
 203     @DefinedBy(Api.COMPILER_TREE)
 204     public JCTree visitExpressionStatement(ExpressionStatementTree node, P p) {
 205         JCExpressionStatement t = (JCExpressionStatement) node;
 206         JCExpression expr = copy(t.expr, p);
 207         return M.at(t.pos).Exec(expr);
 208     }
 209 
 210     @DefinedBy(Api.COMPILER_TREE)
 211     public JCTree visitEnhancedForLoop(EnhancedForLoopTree node, P p) {
 212         JCEnhancedForLoop t = (JCEnhancedForLoop) node;
 213         JCVariableDecl var = copy(t.var, p);
 214         JCExpression expr = copy(t.expr, p);
 215         JCStatement body = copy(t.body, p);
 216         return M.at(t.pos).ForeachLoop(var, expr, body);
 217     }
 218 
 219     @DefinedBy(Api.COMPILER_TREE)
 220     public JCTree visitForLoop(ForLoopTree node, P p) {
 221         JCForLoop t = (JCForLoop) node;
 222         List<JCStatement> init = copy(t.init, p);
 223         JCExpression cond = copy(t.cond, p);
 224         List<JCExpressionStatement> step = copy(t.step, p);
 225         JCStatement body = copy(t.body, p);
 226         return M.at(t.pos).ForLoop(init, cond, step, body);
 227     }
 228 
 229     @DefinedBy(Api.COMPILER_TREE)
 230     public JCTree visitIdentifier(IdentifierTree node, P p) {
 231         JCIdent t = (JCIdent) node;
 232         return M.at(t.pos).Ident(t.name);
 233     }
 234 
 235     @DefinedBy(Api.COMPILER_TREE)
 236     public JCTree visitIf(IfTree node, P p) {
 237         JCIf t = (JCIf) node;
 238         JCExpression cond = copy(t.cond, p);
 239         JCStatement thenpart = copy(t.thenpart, p);
 240         JCStatement elsepart = copy(t.elsepart, p);
 241         return M.at(t.pos).If(cond, thenpart, elsepart);
 242     }
 243 
 244     @DefinedBy(Api.COMPILER_TREE)
 245     public JCTree visitImport(ImportTree node, P p) {
 246         JCImport t = (JCImport) node;
 247         JCTree qualid = copy(t.qualid, p);
 248         return M.at(t.pos).Import(qualid, t.staticImport);
 249     }
 250 
 251     @DefinedBy(Api.COMPILER_TREE)
 252     public JCTree visitArrayAccess(ArrayAccessTree node, P p) {
 253         JCArrayAccess t = (JCArrayAccess) node;
 254         JCExpression indexed = copy(t.indexed, p);
 255         JCExpression index = copy(t.index, p);
 256         return M.at(t.pos).Indexed(indexed, index);
 257     }
 258 
 259     @DefinedBy(Api.COMPILER_TREE)
 260     public JCTree visitLabeledStatement(LabeledStatementTree node, P p) {
 261         JCLabeledStatement t = (JCLabeledStatement) node;
 262         JCStatement body = copy(t.body, p);
 263         return M.at(t.pos).Labelled(t.label, body);
 264     }
 265 
 266     @DefinedBy(Api.COMPILER_TREE)
 267     public JCTree visitLiteral(LiteralTree node, P p) {
 268         JCLiteral t = (JCLiteral) node;
 269         return M.at(t.pos).Literal(t.typetag, t.value);
 270     }
 271 
 272     @DefinedBy(Api.COMPILER_TREE)
 273     public JCTree visitMethod(MethodTree node, P p) {
 274         JCMethodDecl t  = (JCMethodDecl) node;
 275         JCModifiers mods = copy(t.mods, p);
 276         JCExpression restype = copy(t.restype, p);
 277         List<JCTypeParameter> typarams = copy(t.typarams, p);
 278         List<JCVariableDecl> params = copy(t.params, p);
 279         JCVariableDecl recvparam = copy(t.recvparam, p);
 280         List<JCExpression> thrown = copy(t.thrown, p);
 281         JCBlock body = copy(t.body, p);
 282         JCExpression defaultValue = copy(t.defaultValue, p);
 283         return M.at(t.pos).MethodDef(mods, t.name, restype, typarams, recvparam, params, thrown, body, defaultValue);
 284     }
 285 
 286     @DefinedBy(Api.COMPILER_TREE)
 287     public JCTree visitMethodInvocation(MethodInvocationTree node, P p) {
 288         JCMethodInvocation t = (JCMethodInvocation) node;
 289         List<JCExpression> typeargs = copy(t.typeargs, p);
 290         JCExpression meth = copy(t.meth, p);
 291         List<JCExpression> args = copy(t.args, p);
 292         return M.at(t.pos).Apply(typeargs, meth, args);
 293     }
 294 
 295     @DefinedBy(Api.COMPILER_TREE)
 296     public JCTree visitModifiers(ModifiersTree node, P p) {
 297         JCModifiers t = (JCModifiers) node;
 298         List<JCAnnotation> annotations = copy(t.annotations, p);
 299         return M.at(t.pos).Modifiers(t.flags, annotations);
 300     }
 301 
 302     @DefinedBy(Api.COMPILER_TREE)
 303     public JCTree visitNewArray(NewArrayTree node, P p) {
 304         JCNewArray t = (JCNewArray) node;
 305         JCExpression elemtype = copy(t.elemtype, p);
 306         List<JCExpression> dims = copy(t.dims, p);
 307         List<JCExpression> elems = copy(t.elems, p);
 308         return M.at(t.pos).NewArray(elemtype, dims, elems);
 309     }
 310 
 311     @DefinedBy(Api.COMPILER_TREE)
 312     public JCTree visitNewClass(NewClassTree node, P p) {
 313         JCNewClass t = (JCNewClass) node;
 314         JCExpression encl = copy(t.encl, p);
 315         List<JCExpression> typeargs = copy(t.typeargs, p);
 316         JCExpression clazz = copy(t.clazz, p);
 317         List<JCExpression> args = copy(t.args, p);
 318         JCClassDecl def = copy(t.def, p);
 319         return M.at(t.pos).NewClass(encl, typeargs, clazz, args, def);
 320     }
 321 
 322     @DefinedBy(Api.COMPILER_TREE)
 323     public JCTree visitLambdaExpression(LambdaExpressionTree node, P p) {
 324         JCLambda t = (JCLambda) node;
 325         List<JCVariableDecl> params = copy(t.params, p);
 326         JCTree body = copy(t.body, p);
 327         return M.at(t.pos).Lambda(params, body);
 328     }
 329 
 330     @DefinedBy(Api.COMPILER_TREE)
 331     public JCTree visitParenthesized(ParenthesizedTree node, P p) {
 332         JCParens t = (JCParens) node;
 333         JCExpression expr = copy(t.expr, p);
 334         return M.at(t.pos).Parens(expr);
 335     }
 336 
 337     @DefinedBy(Api.COMPILER_TREE)
 338     public JCTree visitReturn(ReturnTree node, P p) {
 339         JCReturn t = (JCReturn) node;
 340         JCExpression expr = copy(t.expr, p);
 341         return M.at(t.pos).Return(expr);
 342     }
 343 
 344     @DefinedBy(Api.COMPILER_TREE)
 345     public JCTree visitMemberSelect(MemberSelectTree node, P p) {
 346         JCFieldAccess t = (JCFieldAccess) node;
 347         JCExpression selected = copy(t.selected, p);
 348         return M.at(t.pos).Select(selected, t.name);
 349     }
 350 
 351     @DefinedBy(Api.COMPILER_TREE)
 352     public JCTree visitMemberReference(MemberReferenceTree node, P p) {
 353         JCMemberReference t = (JCMemberReference) node;
 354         JCExpression expr = copy(t.expr, p);
 355         List<JCExpression> typeargs = copy(t.typeargs, p);
 356         return M.at(t.pos).Reference(t.mode, t.name, expr, typeargs);
 357     }
 358 
 359     @DefinedBy(Api.COMPILER_TREE)
 360     public JCTree visitEmptyStatement(EmptyStatementTree node, P p) {
 361         JCSkip t = (JCSkip) node;
 362         return M.at(t.pos).Skip();
 363     }
 364 
 365     @DefinedBy(Api.COMPILER_TREE)
 366     public JCTree visitSwitch(SwitchTree node, P p) {
 367         JCSwitch t = (JCSwitch) node;
 368         JCExpression selector = copy(t.selector, p);
 369         List<JCCase> cases = copy(t.cases, p);
 370         return M.at(t.pos).Switch(selector, cases);
 371     }
 372 
 373     @DefinedBy(Api.COMPILER_TREE)
 374     public JCTree visitSynchronized(SynchronizedTree node, P p) {
 375         JCSynchronized t = (JCSynchronized) node;
 376         JCExpression lock = copy(t.lock, p);
 377         JCBlock body = copy(t.body, p);
 378         return M.at(t.pos).Synchronized(lock, body);
 379     }
 380 
 381     @DefinedBy(Api.COMPILER_TREE)
 382     public JCTree visitThrow(ThrowTree node, P p) {
 383         JCThrow t = (JCThrow) node;
 384         JCExpression expr = copy(t.expr, p);
 385         return M.at(t.pos).Throw(expr);
 386     }
 387 
 388     @DefinedBy(Api.COMPILER_TREE)
 389     public JCTree visitCompilationUnit(CompilationUnitTree node, P p) {
 390         JCCompilationUnit t = (JCCompilationUnit) node;
 391         List<JCTree> defs = copy(t.defs, p);
 392         return M.at(t.pos).TopLevel(defs);
 393     }
 394 
 395     @DefinedBy(Api.COMPILER_TREE)
 396     public JCTree visitPackage(PackageTree node, P p) {
 397         JCPackageDecl t = (JCPackageDecl) node;
 398         List<JCAnnotation> annotations = copy(t.annotations, p);
 399         JCExpression pid = copy(t.pid, p);
 400         return M.at(t.pos).PackageDecl(annotations, pid);
 401     }
 402 
 403     @DefinedBy(Api.COMPILER_TREE)
 404     public JCTree visitTry(TryTree node, P p) {
 405         JCTry t = (JCTry) node;
 406         List<JCTree> resources = copy(t.resources, p);
 407         JCBlock body = copy(t.body, p);
 408         List<JCCatch> catchers = copy(t.catchers, p);
 409         JCBlock finalizer = copy(t.finalizer, p);
 410         return M.at(t.pos).Try(resources, body, catchers, finalizer);
 411     }
 412 
 413     @DefinedBy(Api.COMPILER_TREE)
 414     public JCTree visitParameterizedType(ParameterizedTypeTree node, P p) {
 415         JCTypeApply t = (JCTypeApply) node;
 416         JCExpression clazz = copy(t.clazz, p);
 417         List<JCExpression> arguments = copy(t.arguments, p);
 418         return M.at(t.pos).TypeApply(clazz, arguments);
 419     }
 420 
 421     @DefinedBy(Api.COMPILER_TREE)
 422     public JCTree visitUnionType(UnionTypeTree node, P p) {
 423         JCTypeUnion t = (JCTypeUnion) node;
 424         List<JCExpression> components = copy(t.alternatives, p);
 425         return M.at(t.pos).TypeUnion(components);
 426     }
 427 
 428     @DefinedBy(Api.COMPILER_TREE)
 429     public JCTree visitIntersectionType(IntersectionTypeTree node, P p) {
 430         JCTypeIntersection t = (JCTypeIntersection) node;
 431         List<JCExpression> bounds = copy(t.bounds, p);
 432         return M.at(t.pos).TypeIntersection(bounds);
 433     }
 434 
 435     @DefinedBy(Api.COMPILER_TREE)
 436     public JCTree visitArrayType(ArrayTypeTree node, P p) {
 437         JCArrayTypeTree t = (JCArrayTypeTree) node;
 438         JCExpression elemtype = copy(t.elemtype, p);
 439         return M.at(t.pos).TypeArray(elemtype);
 440     }
 441 
 442     @DefinedBy(Api.COMPILER_TREE)
 443     public JCTree visitTypeCast(TypeCastTree node, P p) {
 444         JCTypeCast t = (JCTypeCast) node;
 445         JCTree clazz = copy(t.clazz, p);
 446         JCExpression expr = copy(t.expr, p);
 447         return M.at(t.pos).TypeCast(clazz, expr);
 448     }
 449 
 450     @DefinedBy(Api.COMPILER_TREE)
 451     public JCTree visitPrimitiveType(PrimitiveTypeTree node, P p) {
 452         JCPrimitiveTypeTree t = (JCPrimitiveTypeTree) node;
 453         return M.at(t.pos).TypeIdent(t.typetag);
 454     }
 455 
 456     @DefinedBy(Api.COMPILER_TREE)
 457     public JCTree visitTypeParameter(TypeParameterTree node, P p) {
 458         JCTypeParameter t = (JCTypeParameter) node;
 459         List<JCAnnotation> annos = copy(t.annotations, p);
 460         List<JCExpression> bounds = copy(t.bounds, p);
 461         return M.at(t.pos).TypeParameter(t.name, bounds, annos);
 462     }
 463 
 464     @DefinedBy(Api.COMPILER_TREE)
 465     public JCTree visitInstanceOf(InstanceOfTree node, P p) {
 466         JCInstanceOf t = (JCInstanceOf) node;
 467         JCExpression expr = copy(t.expr, p);
 468         JCTree clazz = copy(t.clazz, p);
 469         return M.at(t.pos).TypeTest(expr, clazz);
 470     }
 471 
 472     @DefinedBy(Api.COMPILER_TREE)
 473     public JCTree visitUnary(UnaryTree node, P p) {
 474         JCUnary t = (JCUnary) node;
 475         JCExpression arg = copy(t.arg, p);
 476         return M.at(t.pos).Unary(t.getTag(), arg);
 477     }
 478 
 479     @DefinedBy(Api.COMPILER_TREE)
 480     public JCTree visitVariable(VariableTree node, P p) {
 481         JCVariableDecl t = (JCVariableDecl) node;
 482         JCModifiers mods = copy(t.mods, p);
 483         JCExpression vartype = copy(t.vartype, p);
 484         if (t.nameexpr == null) {
 485             JCExpression init = copy(t.init, p);
 486             return M.at(t.pos).VarDef(mods, t.name, vartype, init);
 487         } else {
 488             JCExpression nameexpr = copy(t.nameexpr, p);
 489             return M.at(t.pos).ReceiverVarDef(mods, nameexpr, vartype);
 490         }
 491     }
 492 
 493     @DefinedBy(Api.COMPILER_TREE)
 494     public JCTree visitWhileLoop(WhileLoopTree node, P p) {
 495         JCWhileLoop t = (JCWhileLoop) node;
 496         JCStatement body = copy(t.body, p);
 497         JCExpression cond = copy(t.cond, p);
 498         return M.at(t.pos).WhileLoop(cond, body);
 499     }
 500 
 501     @DefinedBy(Api.COMPILER_TREE)
 502     public JCTree visitWildcard(WildcardTree node, P p) {
 503         JCWildcard t = (JCWildcard) node;
 504         TypeBoundKind kind = M.at(t.kind.pos).TypeBoundKind(t.kind.kind);
 505         JCTree inner = copy(t.inner, p);
 506         return M.at(t.pos).Wildcard(kind, inner);
 507     }
 508 
 509     @Override @DefinedBy(Api.COMPILER_TREE)
 510     public JCTree visitModule(ModuleTree node, P p) {
 511         JCModuleDecl t = (JCModuleDecl) node;
 512         JCModifiers mods = copy(t.mods, p);
 513         JCExpression qualId = copy(t.qualId);
 514         List<JCDirective> directives = copy(t.directives);
 515         return M.at(t.pos).ModuleDef(mods, t.getModuleType(), qualId, directives);
 516     }
 517 
 518     @Override @DefinedBy(Api.COMPILER_TREE)
 519     public JCExports visitExports(ExportsTree node, P p) {
 520         JCExports t = (JCExports) node;
 521         JCExpression qualId = copy(t.qualid, p);
 522         List<JCExpression> moduleNames = copy(t.moduleNames, p);
 523         return M.at(t.pos).Exports(qualId, moduleNames);
 524     }
 525 
 526     @Override @DefinedBy(Api.COMPILER_TREE)
 527     public JCOpens visitOpens(OpensTree node, P p) {
 528         JCOpens t = (JCOpens) node;
 529         JCExpression qualId = copy(t.qualid, p);
 530         List<JCExpression> moduleNames = copy(t.moduleNames, p);
 531         return M.at(t.pos).Opens(qualId, moduleNames);
 532     }
 533 
 534     @Override @DefinedBy(Api.COMPILER_TREE)
 535     public JCProvides visitProvides(ProvidesTree node, P p) {
 536         JCProvides t = (JCProvides) node;
 537         JCExpression serviceName = copy(t.serviceName, p);
 538         List<JCExpression> implNames = copy(t.implNames, p);
 539         return M.at(t.pos).Provides(serviceName, implNames);
 540     }
 541 
 542     @Override @DefinedBy(Api.COMPILER_TREE)
 543     public JCRequires visitRequires(RequiresTree node, P p) {
 544         JCRequires t = (JCRequires) node;
 545         JCExpression moduleName = copy(t.moduleName, p);
 546         return M.at(t.pos).Requires(t.isTransitive, t.isStaticPhase, moduleName);
 547     }
 548 
 549     @Override @DefinedBy(Api.COMPILER_TREE)
 550     public JCUses visitUses(UsesTree node, P p) {
 551         JCUses t = (JCUses) node;
 552         JCExpression serviceName = copy(t.qualid, p);
 553         return M.at(t.pos).Uses(serviceName);
 554     }
 555 
 556     @DefinedBy(Api.COMPILER_TREE)
 557     public JCTree visitOther(Tree node, P p) {
 558         JCTree tree = (JCTree) node;
 559         switch (tree.getTag()) {
 560             case LETEXPR: {
 561                 LetExpr t = (LetExpr) node;
 562                 List<JCVariableDecl> defs = copy(t.defs, p);
 563                 JCExpression expr = copy(t.expr, p);
 564                 return M.at(t.pos).LetExpr(defs, expr);
 565             }
 566             default:
 567                 throw new AssertionError("unknown tree tag: " + tree.getTag());
 568         }
 569     }
 570 
 571 }