RecursiveASTVisitor.h revision 8ddfb0b72d0e439d01759c1bc7a79ba73dd2830c
1//===--- RecursiveASTVisitor.h - Recursive AST Visitor ----------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the RecursiveASTVisitor interface, which recursively 11// traverses the entire AST. 12// 13//===----------------------------------------------------------------------===// 14#ifndef LLVM_CLANG_AST_RECURSIVEASTVISITOR_H 15#define LLVM_CLANG_AST_RECURSIVEASTVISITOR_H 16 17#include "clang/AST/Decl.h" 18#include "clang/AST/DeclCXX.h" 19#include "clang/AST/DeclFriend.h" 20#include "clang/AST/DeclObjC.h" 21#include "clang/AST/DeclTemplate.h" 22#include "clang/AST/Expr.h" 23#include "clang/AST/ExprCXX.h" 24#include "clang/AST/ExprObjC.h" 25#include "clang/AST/NestedNameSpecifier.h" 26#include "clang/AST/Stmt.h" 27#include "clang/AST/StmtCXX.h" 28#include "clang/AST/StmtObjC.h" 29#include "clang/AST/TemplateBase.h" 30#include "clang/AST/TemplateName.h" 31#include "clang/AST/Type.h" 32#include "clang/AST/TypeLoc.h" 33 34// The following three macros are used for meta programming. The code 35// using them is responsible for defining macro OPERATOR(). 36 37// All unary operators. 38#define UNARYOP_LIST() \ 39 OPERATOR(PostInc) OPERATOR(PostDec) \ 40 OPERATOR(PreInc) OPERATOR(PreDec) \ 41 OPERATOR(AddrOf) OPERATOR(Deref) \ 42 OPERATOR(Plus) OPERATOR(Minus) \ 43 OPERATOR(Not) OPERATOR(LNot) \ 44 OPERATOR(Real) OPERATOR(Imag) \ 45 OPERATOR(Extension) 46 47// All binary operators (excluding compound assign operators). 48#define BINOP_LIST() \ 49 OPERATOR(PtrMemD) OPERATOR(PtrMemI) \ 50 OPERATOR(Mul) OPERATOR(Div) OPERATOR(Rem) \ 51 OPERATOR(Add) OPERATOR(Sub) OPERATOR(Shl) \ 52 OPERATOR(Shr) \ 53 \ 54 OPERATOR(LT) OPERATOR(GT) OPERATOR(LE) \ 55 OPERATOR(GE) OPERATOR(EQ) OPERATOR(NE) \ 56 OPERATOR(And) OPERATOR(Xor) OPERATOR(Or) \ 57 OPERATOR(LAnd) OPERATOR(LOr) \ 58 \ 59 OPERATOR(Assign) \ 60 OPERATOR(Comma) 61 62// All compound assign operators. 63#define CAO_LIST() \ 64 OPERATOR(Mul) OPERATOR(Div) OPERATOR(Rem) OPERATOR(Add) OPERATOR(Sub) \ 65 OPERATOR(Shl) OPERATOR(Shr) OPERATOR(And) OPERATOR(Or) OPERATOR(Xor) 66 67namespace clang { 68 69// A helper macro to implement short-circuiting when recursing. It 70// invokes CALL_EXPR, which must be a method call, on the derived 71// object (s.t. a user of RecursiveASTVisitor can override the method 72// in CALL_EXPR). 73#define TRY_TO(CALL_EXPR) \ 74 do { if (!getDerived().CALL_EXPR) return false; } while (0) 75 76/// \brief A class that does preorder depth-first traversal on the 77/// entire Clang AST and visits each node. 78/// 79/// This class performs three distinct tasks: 80/// 1. traverse the AST (i.e. go to each node); 81/// 2. at a given node, walk up the class hierarchy, starting from 82/// the node's dynamic type, until the top-most class (e.g. Stmt, 83/// Decl, or Type) is reached. 84/// 3. given a (node, class) combination, where 'class' is some base 85/// class of the dynamic type of 'node', call a user-overridable 86/// function to actually visit the node. 87/// 88/// These tasks are done by three groups of methods, respectively: 89/// 1. TraverseDecl(Decl *x) does task #1. It is the entry point 90/// for traversing an AST rooted at x. This method simply 91/// dispatches (i.e. forwards) to TraverseFoo(Foo *x) where Foo 92/// is the dynamic type of *x, which calls WalkUpFromFoo(x) and 93/// then recursively visits the child nodes of x. 94/// TraverseStmt(Stmt *x) and TraverseType(QualType x) work 95/// similarly. 96/// 2. WalkUpFromFoo(Foo *x) does task #2. It does not try to visit 97/// any child node of x. Instead, it first calls WalkUpFromBar(x) 98/// where Bar is the direct parent class of Foo (unless Foo has 99/// no parent), and then calls VisitFoo(x) (see the next list item). 100/// 3. VisitFoo(Foo *x) does task #3. 101/// 102/// These three method groups are tiered (Traverse* > WalkUpFrom* > 103/// Visit*). A method (e.g. Traverse*) may call methods from the same 104/// tier (e.g. other Traverse*) or one tier lower (e.g. WalkUpFrom*). 105/// It may not call methods from a higher tier. 106/// 107/// Note that since WalkUpFromFoo() calls WalkUpFromBar() (where Bar 108/// is Foo's super class) before calling VisitFoo(), the result is 109/// that the Visit*() methods for a given node are called in the 110/// top-down order (e.g. for a node of type NamedDecl, the order will 111/// be VisitDecl(), VisitNamedDecl(), and then VisitNamespaceDecl()). 112/// 113/// This scheme guarantees that all Visit*() calls for the same AST 114/// node are grouped together. In other words, Visit*() methods for 115/// different nodes are never interleaved. 116/// 117/// Clients of this visitor should subclass the visitor (providing 118/// themselves as the template argument, using the curiously recurring 119/// template pattern) and override any of the Traverse*, WalkUpFrom*, 120/// and Visit* methods for declarations, types, statements, 121/// expressions, or other AST nodes where the visitor should customize 122/// behavior. Most users only need to override Visit*. Advanced 123/// users may override Traverse* and WalkUpFrom* to implement custom 124/// traversal strategies. Returning false from one of these overridden 125/// functions will abort the entire traversal. 126/// 127/// By default, this visitor tries to visit every part of the explicit 128/// source code exactly once. The default policy towards templates 129/// is to descend into the 'pattern' class or function body, not any 130/// explicit or implicit instantiations. Explicit specializations 131/// are still visited, and the patterns of partial specializations 132/// are visited separately. This behavior can be changed by 133/// overriding shouldVisitTemplateInstantiations() in the derived class 134/// to return true, in which case all known implicit and explicit 135/// instantiations will be visited at the same time as the pattern 136/// from which they were produced. 137template<typename Derived> 138class RecursiveASTVisitor { 139public: 140 /// \brief Return a reference to the derived class. 141 Derived &getDerived() { return *static_cast<Derived*>(this); } 142 143 /// \brief Return whether this visitor should recurse into 144 /// template instantiations. 145 bool shouldVisitTemplateInstantiations() const { return false; } 146 147 /// \brief Return whether this visitor should recurse into the types of 148 /// TypeLocs. 149 bool shouldWalkTypesOfTypeLocs() const { return true; } 150 151 /// \brief Return whether this visitor should recurse into implicit 152 /// code, e.g., implicit constructors and destructors. 153 bool shouldVisitImplicitCode() const { return false; } 154 155 /// \brief Return whether \param S should be traversed using data recursion 156 /// to avoid a stack overflow with extreme cases. 157 bool shouldUseDataRecursionFor(Stmt *S) const { 158 return isa<BinaryOperator>(S) || isa<UnaryOperator>(S) || 159 isa<CaseStmt>(S) || isa<CXXOperatorCallExpr>(S); 160 } 161 162 /// \brief Recursively visit a statement or expression, by 163 /// dispatching to Traverse*() based on the argument's dynamic type. 164 /// 165 /// \returns false if the visitation was terminated early, true 166 /// otherwise (including when the argument is NULL). 167 bool TraverseStmt(Stmt *S); 168 169 /// \brief Recursively visit a type, by dispatching to 170 /// Traverse*Type() based on the argument's getTypeClass() property. 171 /// 172 /// \returns false if the visitation was terminated early, true 173 /// otherwise (including when the argument is a Null type). 174 bool TraverseType(QualType T); 175 176 /// \brief Recursively visit a type with location, by dispatching to 177 /// Traverse*TypeLoc() based on the argument type's getTypeClass() property. 178 /// 179 /// \returns false if the visitation was terminated early, true 180 /// otherwise (including when the argument is a Null type location). 181 bool TraverseTypeLoc(TypeLoc TL); 182 183 /// \brief Recursively visit a declaration, by dispatching to 184 /// Traverse*Decl() based on the argument's dynamic type. 185 /// 186 /// \returns false if the visitation was terminated early, true 187 /// otherwise (including when the argument is NULL). 188 bool TraverseDecl(Decl *D); 189 190 /// \brief Recursively visit a C++ nested-name-specifier. 191 /// 192 /// \returns false if the visitation was terminated early, true otherwise. 193 bool TraverseNestedNameSpecifier(NestedNameSpecifier *NNS); 194 195 /// \brief Recursively visit a C++ nested-name-specifier with location 196 /// information. 197 /// 198 /// \returns false if the visitation was terminated early, true otherwise. 199 bool TraverseNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS); 200 201 /// \brief Recursively visit a name with its location information. 202 /// 203 /// \returns false if the visitation was terminated early, true otherwise. 204 bool TraverseDeclarationNameInfo(DeclarationNameInfo NameInfo); 205 206 /// \brief Recursively visit a template name and dispatch to the 207 /// appropriate method. 208 /// 209 /// \returns false if the visitation was terminated early, true otherwise. 210 bool TraverseTemplateName(TemplateName Template); 211 212 /// \brief Recursively visit a template argument and dispatch to the 213 /// appropriate method for the argument type. 214 /// 215 /// \returns false if the visitation was terminated early, true otherwise. 216 // FIXME: migrate callers to TemplateArgumentLoc instead. 217 bool TraverseTemplateArgument(const TemplateArgument &Arg); 218 219 /// \brief Recursively visit a template argument location and dispatch to the 220 /// appropriate method for the argument type. 221 /// 222 /// \returns false if the visitation was terminated early, true otherwise. 223 bool TraverseTemplateArgumentLoc(const TemplateArgumentLoc &ArgLoc); 224 225 /// \brief Recursively visit a set of template arguments. 226 /// This can be overridden by a subclass, but it's not expected that 227 /// will be needed -- this visitor always dispatches to another. 228 /// 229 /// \returns false if the visitation was terminated early, true otherwise. 230 // FIXME: take a TemplateArgumentLoc* (or TemplateArgumentListInfo) instead. 231 bool TraverseTemplateArguments(const TemplateArgument *Args, 232 unsigned NumArgs); 233 234 /// \brief Recursively visit a constructor initializer. This 235 /// automatically dispatches to another visitor for the initializer 236 /// expression, but not for the name of the initializer, so may 237 /// be overridden for clients that need access to the name. 238 /// 239 /// \returns false if the visitation was terminated early, true otherwise. 240 bool TraverseConstructorInitializer(CXXCtorInitializer *Init); 241 242 /// \brief Recursively visit a lambda capture. 243 /// 244 /// \returns false if the visitation was terminated early, true otherwise. 245 bool TraverseLambdaCapture(LambdaExpr::Capture C); 246 247 // ---- Methods on Stmts ---- 248 249 // Declare Traverse*() for all concrete Stmt classes. 250#define ABSTRACT_STMT(STMT) 251#define STMT(CLASS, PARENT) \ 252 bool Traverse##CLASS(CLASS *S); 253#include "clang/AST/StmtNodes.inc" 254 // The above header #undefs ABSTRACT_STMT and STMT upon exit. 255 256 // Define WalkUpFrom*() and empty Visit*() for all Stmt classes. 257 bool WalkUpFromStmt(Stmt *S) { return getDerived().VisitStmt(S); } 258 bool VisitStmt(Stmt *S) { return true; } 259#define STMT(CLASS, PARENT) \ 260 bool WalkUpFrom##CLASS(CLASS *S) { \ 261 TRY_TO(WalkUpFrom##PARENT(S)); \ 262 TRY_TO(Visit##CLASS(S)); \ 263 return true; \ 264 } \ 265 bool Visit##CLASS(CLASS *S) { return true; } 266#include "clang/AST/StmtNodes.inc" 267 268 // Define Traverse*(), WalkUpFrom*(), and Visit*() for unary 269 // operator methods. Unary operators are not classes in themselves 270 // (they're all opcodes in UnaryOperator) but do have visitors. 271#define OPERATOR(NAME) \ 272 bool TraverseUnary##NAME(UnaryOperator *S) { \ 273 TRY_TO(WalkUpFromUnary##NAME(S)); \ 274 TRY_TO(TraverseStmt(S->getSubExpr())); \ 275 return true; \ 276 } \ 277 bool WalkUpFromUnary##NAME(UnaryOperator *S) { \ 278 TRY_TO(WalkUpFromUnaryOperator(S)); \ 279 TRY_TO(VisitUnary##NAME(S)); \ 280 return true; \ 281 } \ 282 bool VisitUnary##NAME(UnaryOperator *S) { return true; } 283 284 UNARYOP_LIST() 285#undef OPERATOR 286 287 // Define Traverse*(), WalkUpFrom*(), and Visit*() for binary 288 // operator methods. Binary operators are not classes in themselves 289 // (they're all opcodes in BinaryOperator) but do have visitors. 290#define GENERAL_BINOP_FALLBACK(NAME, BINOP_TYPE) \ 291 bool TraverseBin##NAME(BINOP_TYPE *S) { \ 292 TRY_TO(WalkUpFromBin##NAME(S)); \ 293 TRY_TO(TraverseStmt(S->getLHS())); \ 294 TRY_TO(TraverseStmt(S->getRHS())); \ 295 return true; \ 296 } \ 297 bool WalkUpFromBin##NAME(BINOP_TYPE *S) { \ 298 TRY_TO(WalkUpFrom##BINOP_TYPE(S)); \ 299 TRY_TO(VisitBin##NAME(S)); \ 300 return true; \ 301 } \ 302 bool VisitBin##NAME(BINOP_TYPE *S) { return true; } 303 304#define OPERATOR(NAME) GENERAL_BINOP_FALLBACK(NAME, BinaryOperator) 305 BINOP_LIST() 306#undef OPERATOR 307 308 // Define Traverse*(), WalkUpFrom*(), and Visit*() for compound 309 // assignment methods. Compound assignment operators are not 310 // classes in themselves (they're all opcodes in 311 // CompoundAssignOperator) but do have visitors. 312#define OPERATOR(NAME) \ 313 GENERAL_BINOP_FALLBACK(NAME##Assign, CompoundAssignOperator) 314 315 CAO_LIST() 316#undef OPERATOR 317#undef GENERAL_BINOP_FALLBACK 318 319 // ---- Methods on Types ---- 320 // FIXME: revamp to take TypeLoc's rather than Types. 321 322 // Declare Traverse*() for all concrete Type classes. 323#define ABSTRACT_TYPE(CLASS, BASE) 324#define TYPE(CLASS, BASE) \ 325 bool Traverse##CLASS##Type(CLASS##Type *T); 326#include "clang/AST/TypeNodes.def" 327 // The above header #undefs ABSTRACT_TYPE and TYPE upon exit. 328 329 // Define WalkUpFrom*() and empty Visit*() for all Type classes. 330 bool WalkUpFromType(Type *T) { return getDerived().VisitType(T); } 331 bool VisitType(Type *T) { return true; } 332#define TYPE(CLASS, BASE) \ 333 bool WalkUpFrom##CLASS##Type(CLASS##Type *T) { \ 334 TRY_TO(WalkUpFrom##BASE(T)); \ 335 TRY_TO(Visit##CLASS##Type(T)); \ 336 return true; \ 337 } \ 338 bool Visit##CLASS##Type(CLASS##Type *T) { return true; } 339#include "clang/AST/TypeNodes.def" 340 341 // ---- Methods on TypeLocs ---- 342 // FIXME: this currently just calls the matching Type methods 343 344 // Declare Traverse*() for all concrete Type classes. 345#define ABSTRACT_TYPELOC(CLASS, BASE) 346#define TYPELOC(CLASS, BASE) \ 347 bool Traverse##CLASS##TypeLoc(CLASS##TypeLoc TL); 348#include "clang/AST/TypeLocNodes.def" 349 // The above header #undefs ABSTRACT_TYPELOC and TYPELOC upon exit. 350 351 // Define WalkUpFrom*() and empty Visit*() for all TypeLoc classes. 352 bool WalkUpFromTypeLoc(TypeLoc TL) { return getDerived().VisitTypeLoc(TL); } 353 bool VisitTypeLoc(TypeLoc TL) { return true; } 354 355 // QualifiedTypeLoc and UnqualTypeLoc are not declared in 356 // TypeNodes.def and thus need to be handled specially. 357 bool WalkUpFromQualifiedTypeLoc(QualifiedTypeLoc TL) { 358 return getDerived().VisitUnqualTypeLoc(TL.getUnqualifiedLoc()); 359 } 360 bool VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { return true; } 361 bool WalkUpFromUnqualTypeLoc(UnqualTypeLoc TL) { 362 return getDerived().VisitUnqualTypeLoc(TL.getUnqualifiedLoc()); 363 } 364 bool VisitUnqualTypeLoc(UnqualTypeLoc TL) { return true; } 365 366 // Note that BASE includes trailing 'Type' which CLASS doesn't. 367#define TYPE(CLASS, BASE) \ 368 bool WalkUpFrom##CLASS##TypeLoc(CLASS##TypeLoc TL) { \ 369 TRY_TO(WalkUpFrom##BASE##Loc(TL)); \ 370 TRY_TO(Visit##CLASS##TypeLoc(TL)); \ 371 return true; \ 372 } \ 373 bool Visit##CLASS##TypeLoc(CLASS##TypeLoc TL) { return true; } 374#include "clang/AST/TypeNodes.def" 375 376 // ---- Methods on Decls ---- 377 378 // Declare Traverse*() for all concrete Decl classes. 379#define ABSTRACT_DECL(DECL) 380#define DECL(CLASS, BASE) \ 381 bool Traverse##CLASS##Decl(CLASS##Decl *D); 382#include "clang/AST/DeclNodes.inc" 383 // The above header #undefs ABSTRACT_DECL and DECL upon exit. 384 385 // Define WalkUpFrom*() and empty Visit*() for all Decl classes. 386 bool WalkUpFromDecl(Decl *D) { return getDerived().VisitDecl(D); } 387 bool VisitDecl(Decl *D) { return true; } 388#define DECL(CLASS, BASE) \ 389 bool WalkUpFrom##CLASS##Decl(CLASS##Decl *D) { \ 390 TRY_TO(WalkUpFrom##BASE(D)); \ 391 TRY_TO(Visit##CLASS##Decl(D)); \ 392 return true; \ 393 } \ 394 bool Visit##CLASS##Decl(CLASS##Decl *D) { return true; } 395#include "clang/AST/DeclNodes.inc" 396 397private: 398 // These are helper methods used by more than one Traverse* method. 399 bool TraverseTemplateParameterListHelper(TemplateParameterList *TPL); 400 bool TraverseClassInstantiations(ClassTemplateDecl *D); 401 bool TraverseFunctionInstantiations(FunctionTemplateDecl *D) ; 402 bool TraverseTemplateArgumentLocsHelper(const TemplateArgumentLoc *TAL, 403 unsigned Count); 404 bool TraverseArrayTypeLocHelper(ArrayTypeLoc TL); 405 bool TraverseRecordHelper(RecordDecl *D); 406 bool TraverseCXXRecordHelper(CXXRecordDecl *D); 407 bool TraverseDeclaratorHelper(DeclaratorDecl *D); 408 bool TraverseDeclContextHelper(DeclContext *DC); 409 bool TraverseFunctionHelper(FunctionDecl *D); 410 bool TraverseVarHelper(VarDecl *D); 411 412 struct EnqueueJob { 413 Stmt *S; 414 Stmt::child_iterator StmtIt; 415 416 EnqueueJob(Stmt *S) : S(S), StmtIt() {} 417 }; 418 bool dataTraverse(Stmt *S); 419 bool dataTraverseNode(Stmt *S, bool &EnqueueChildren); 420}; 421 422template<typename Derived> 423bool RecursiveASTVisitor<Derived>::dataTraverse(Stmt *S) { 424 425 SmallVector<EnqueueJob, 16> Queue; 426 Queue.push_back(S); 427 428 while (!Queue.empty()) { 429 EnqueueJob &job = Queue.back(); 430 Stmt *CurrS = job.S; 431 if (!CurrS) { 432 Queue.pop_back(); 433 continue; 434 } 435 436 if (getDerived().shouldUseDataRecursionFor(CurrS)) { 437 if (job.StmtIt == Stmt::child_iterator()) { 438 bool EnqueueChildren = true; 439 if (!dataTraverseNode(CurrS, EnqueueChildren)) return false; 440 if (!EnqueueChildren) { 441 Queue.pop_back(); 442 continue; 443 } 444 job.StmtIt = CurrS->child_begin(); 445 } else { 446 ++job.StmtIt; 447 } 448 449 if (job.StmtIt != CurrS->child_end()) 450 Queue.push_back(*job.StmtIt); 451 else 452 Queue.pop_back(); 453 continue; 454 } 455 456 Queue.pop_back(); 457 TRY_TO(TraverseStmt(CurrS)); 458 } 459 460 return true; 461} 462 463template<typename Derived> 464bool RecursiveASTVisitor<Derived>::dataTraverseNode(Stmt *S, 465 bool &EnqueueChildren) { 466 467 // Dispatch to the corresponding WalkUpFrom* function only if the derived 468 // class didn't override Traverse* (and thus the traversal is trivial). 469#define DISPATCH_WALK(NAME, CLASS, VAR) \ 470 { \ 471 bool (Derived::*DerivedFn)(CLASS*) = &Derived::Traverse##NAME; \ 472 bool (Derived::*BaseFn)(CLASS*) = &RecursiveASTVisitor::Traverse##NAME; \ 473 if (DerivedFn == BaseFn) \ 474 return getDerived().WalkUpFrom##NAME(static_cast<CLASS*>(VAR)); \ 475 } \ 476 EnqueueChildren = false; \ 477 return getDerived().Traverse##NAME(static_cast<CLASS*>(VAR)); 478 479 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(S)) { 480 switch (BinOp->getOpcode()) { 481#define OPERATOR(NAME) \ 482 case BO_##NAME: DISPATCH_WALK(Bin##NAME, BinaryOperator, S); 483 484 BINOP_LIST() 485#undef OPERATOR 486 487#define OPERATOR(NAME) \ 488 case BO_##NAME##Assign: \ 489 DISPATCH_WALK(Bin##NAME##Assign, CompoundAssignOperator, S); 490 491 CAO_LIST() 492#undef OPERATOR 493 } 494 } else if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(S)) { 495 switch (UnOp->getOpcode()) { 496#define OPERATOR(NAME) \ 497 case UO_##NAME: DISPATCH_WALK(Unary##NAME, UnaryOperator, S); 498 499 UNARYOP_LIST() 500#undef OPERATOR 501 } 502 } 503 504 // Top switch stmt: dispatch to TraverseFooStmt for each concrete FooStmt. 505 switch (S->getStmtClass()) { 506 case Stmt::NoStmtClass: break; 507#define ABSTRACT_STMT(STMT) 508#define STMT(CLASS, PARENT) \ 509 case Stmt::CLASS##Class: DISPATCH_WALK(CLASS, CLASS, S); 510#include "clang/AST/StmtNodes.inc" 511 } 512 513#undef DISPATCH_WALK 514 515 return true; 516} 517 518#define DISPATCH(NAME, CLASS, VAR) \ 519 return getDerived().Traverse##NAME(static_cast<CLASS*>(VAR)) 520 521template<typename Derived> 522bool RecursiveASTVisitor<Derived>::TraverseStmt(Stmt *S) { 523 if (!S) 524 return true; 525 526 if (getDerived().shouldUseDataRecursionFor(S)) 527 return dataTraverse(S); 528 529 // If we have a binary expr, dispatch to the subcode of the binop. A smart 530 // optimizer (e.g. LLVM) will fold this comparison into the switch stmt 531 // below. 532 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(S)) { 533 switch (BinOp->getOpcode()) { 534#define OPERATOR(NAME) \ 535 case BO_##NAME: DISPATCH(Bin##NAME, BinaryOperator, S); 536 537 BINOP_LIST() 538#undef OPERATOR 539#undef BINOP_LIST 540 541#define OPERATOR(NAME) \ 542 case BO_##NAME##Assign: \ 543 DISPATCH(Bin##NAME##Assign, CompoundAssignOperator, S); 544 545 CAO_LIST() 546#undef OPERATOR 547#undef CAO_LIST 548 } 549 } else if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(S)) { 550 switch (UnOp->getOpcode()) { 551#define OPERATOR(NAME) \ 552 case UO_##NAME: DISPATCH(Unary##NAME, UnaryOperator, S); 553 554 UNARYOP_LIST() 555#undef OPERATOR 556#undef UNARYOP_LIST 557 } 558 } 559 560 // Top switch stmt: dispatch to TraverseFooStmt for each concrete FooStmt. 561 switch (S->getStmtClass()) { 562 case Stmt::NoStmtClass: break; 563#define ABSTRACT_STMT(STMT) 564#define STMT(CLASS, PARENT) \ 565 case Stmt::CLASS##Class: DISPATCH(CLASS, CLASS, S); 566#include "clang/AST/StmtNodes.inc" 567 } 568 569 return true; 570} 571 572template<typename Derived> 573bool RecursiveASTVisitor<Derived>::TraverseType(QualType T) { 574 if (T.isNull()) 575 return true; 576 577 switch (T->getTypeClass()) { 578#define ABSTRACT_TYPE(CLASS, BASE) 579#define TYPE(CLASS, BASE) \ 580 case Type::CLASS: DISPATCH(CLASS##Type, CLASS##Type, \ 581 const_cast<Type*>(T.getTypePtr())); 582#include "clang/AST/TypeNodes.def" 583 } 584 585 return true; 586} 587 588template<typename Derived> 589bool RecursiveASTVisitor<Derived>::TraverseTypeLoc(TypeLoc TL) { 590 if (TL.isNull()) 591 return true; 592 593 switch (TL.getTypeLocClass()) { 594#define ABSTRACT_TYPELOC(CLASS, BASE) 595#define TYPELOC(CLASS, BASE) \ 596 case TypeLoc::CLASS: \ 597 return getDerived().Traverse##CLASS##TypeLoc(TL.castAs<CLASS##TypeLoc>()); 598#include "clang/AST/TypeLocNodes.def" 599 } 600 601 return true; 602} 603 604 605template<typename Derived> 606bool RecursiveASTVisitor<Derived>::TraverseDecl(Decl *D) { 607 if (!D) 608 return true; 609 610 // As a syntax visitor, by default we want to ignore declarations for 611 // implicit declarations (ones not typed explicitly by the user). 612 if (!getDerived().shouldVisitImplicitCode() && D->isImplicit()) 613 return true; 614 615 switch (D->getKind()) { 616#define ABSTRACT_DECL(DECL) 617#define DECL(CLASS, BASE) \ 618 case Decl::CLASS: DISPATCH(CLASS##Decl, CLASS##Decl, D); 619#include "clang/AST/DeclNodes.inc" 620 } 621 622 return true; 623} 624 625#undef DISPATCH 626 627template<typename Derived> 628bool RecursiveASTVisitor<Derived>::TraverseNestedNameSpecifier( 629 NestedNameSpecifier *NNS) { 630 if (!NNS) 631 return true; 632 633 if (NNS->getPrefix()) 634 TRY_TO(TraverseNestedNameSpecifier(NNS->getPrefix())); 635 636 switch (NNS->getKind()) { 637 case NestedNameSpecifier::Identifier: 638 case NestedNameSpecifier::Namespace: 639 case NestedNameSpecifier::NamespaceAlias: 640 case NestedNameSpecifier::Global: 641 return true; 642 643 case NestedNameSpecifier::TypeSpec: 644 case NestedNameSpecifier::TypeSpecWithTemplate: 645 TRY_TO(TraverseType(QualType(NNS->getAsType(), 0))); 646 } 647 648 return true; 649} 650 651template<typename Derived> 652bool RecursiveASTVisitor<Derived>::TraverseNestedNameSpecifierLoc( 653 NestedNameSpecifierLoc NNS) { 654 if (!NNS) 655 return true; 656 657 if (NestedNameSpecifierLoc Prefix = NNS.getPrefix()) 658 TRY_TO(TraverseNestedNameSpecifierLoc(Prefix)); 659 660 switch (NNS.getNestedNameSpecifier()->getKind()) { 661 case NestedNameSpecifier::Identifier: 662 case NestedNameSpecifier::Namespace: 663 case NestedNameSpecifier::NamespaceAlias: 664 case NestedNameSpecifier::Global: 665 return true; 666 667 case NestedNameSpecifier::TypeSpec: 668 case NestedNameSpecifier::TypeSpecWithTemplate: 669 TRY_TO(TraverseTypeLoc(NNS.getTypeLoc())); 670 break; 671 } 672 673 return true; 674} 675 676template<typename Derived> 677bool RecursiveASTVisitor<Derived>::TraverseDeclarationNameInfo( 678 DeclarationNameInfo NameInfo) { 679 switch (NameInfo.getName().getNameKind()) { 680 case DeclarationName::CXXConstructorName: 681 case DeclarationName::CXXDestructorName: 682 case DeclarationName::CXXConversionFunctionName: 683 if (TypeSourceInfo *TSInfo = NameInfo.getNamedTypeInfo()) 684 TRY_TO(TraverseTypeLoc(TSInfo->getTypeLoc())); 685 686 break; 687 688 case DeclarationName::Identifier: 689 case DeclarationName::ObjCZeroArgSelector: 690 case DeclarationName::ObjCOneArgSelector: 691 case DeclarationName::ObjCMultiArgSelector: 692 case DeclarationName::CXXOperatorName: 693 case DeclarationName::CXXLiteralOperatorName: 694 case DeclarationName::CXXUsingDirective: 695 break; 696 } 697 698 return true; 699} 700 701template<typename Derived> 702bool RecursiveASTVisitor<Derived>::TraverseTemplateName(TemplateName Template) { 703 if (DependentTemplateName *DTN = Template.getAsDependentTemplateName()) 704 TRY_TO(TraverseNestedNameSpecifier(DTN->getQualifier())); 705 else if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 706 TRY_TO(TraverseNestedNameSpecifier(QTN->getQualifier())); 707 708 return true; 709} 710 711template<typename Derived> 712bool RecursiveASTVisitor<Derived>::TraverseTemplateArgument( 713 const TemplateArgument &Arg) { 714 switch (Arg.getKind()) { 715 case TemplateArgument::Null: 716 case TemplateArgument::Declaration: 717 case TemplateArgument::Integral: 718 case TemplateArgument::NullPtr: 719 return true; 720 721 case TemplateArgument::Type: 722 return getDerived().TraverseType(Arg.getAsType()); 723 724 case TemplateArgument::Template: 725 case TemplateArgument::TemplateExpansion: 726 return getDerived().TraverseTemplateName( 727 Arg.getAsTemplateOrTemplatePattern()); 728 729 case TemplateArgument::Expression: 730 return getDerived().TraverseStmt(Arg.getAsExpr()); 731 732 case TemplateArgument::Pack: 733 return getDerived().TraverseTemplateArguments(Arg.pack_begin(), 734 Arg.pack_size()); 735 } 736 737 return true; 738} 739 740// FIXME: no template name location? 741// FIXME: no source locations for a template argument pack? 742template<typename Derived> 743bool RecursiveASTVisitor<Derived>::TraverseTemplateArgumentLoc( 744 const TemplateArgumentLoc &ArgLoc) { 745 const TemplateArgument &Arg = ArgLoc.getArgument(); 746 747 switch (Arg.getKind()) { 748 case TemplateArgument::Null: 749 case TemplateArgument::Declaration: 750 case TemplateArgument::Integral: 751 case TemplateArgument::NullPtr: 752 return true; 753 754 case TemplateArgument::Type: { 755 // FIXME: how can TSI ever be NULL? 756 if (TypeSourceInfo *TSI = ArgLoc.getTypeSourceInfo()) 757 return getDerived().TraverseTypeLoc(TSI->getTypeLoc()); 758 else 759 return getDerived().TraverseType(Arg.getAsType()); 760 } 761 762 case TemplateArgument::Template: 763 case TemplateArgument::TemplateExpansion: 764 if (ArgLoc.getTemplateQualifierLoc()) 765 TRY_TO(getDerived().TraverseNestedNameSpecifierLoc( 766 ArgLoc.getTemplateQualifierLoc())); 767 return getDerived().TraverseTemplateName( 768 Arg.getAsTemplateOrTemplatePattern()); 769 770 case TemplateArgument::Expression: 771 return getDerived().TraverseStmt(ArgLoc.getSourceExpression()); 772 773 case TemplateArgument::Pack: 774 return getDerived().TraverseTemplateArguments(Arg.pack_begin(), 775 Arg.pack_size()); 776 } 777 778 return true; 779} 780 781template<typename Derived> 782bool RecursiveASTVisitor<Derived>::TraverseTemplateArguments( 783 const TemplateArgument *Args, 784 unsigned NumArgs) { 785 for (unsigned I = 0; I != NumArgs; ++I) { 786 TRY_TO(TraverseTemplateArgument(Args[I])); 787 } 788 789 return true; 790} 791 792template<typename Derived> 793bool RecursiveASTVisitor<Derived>::TraverseConstructorInitializer( 794 CXXCtorInitializer *Init) { 795 if (TypeSourceInfo *TInfo = Init->getTypeSourceInfo()) 796 TRY_TO(TraverseTypeLoc(TInfo->getTypeLoc())); 797 798 if (Init->isWritten() || getDerived().shouldVisitImplicitCode()) 799 TRY_TO(TraverseStmt(Init->getInit())); 800 return true; 801} 802 803template<typename Derived> 804bool RecursiveASTVisitor<Derived>::TraverseLambdaCapture(LambdaExpr::Capture C){ 805 return true; 806} 807 808// ----------------- Type traversal ----------------- 809 810// This macro makes available a variable T, the passed-in type. 811#define DEF_TRAVERSE_TYPE(TYPE, CODE) \ 812 template<typename Derived> \ 813 bool RecursiveASTVisitor<Derived>::Traverse##TYPE (TYPE *T) { \ 814 TRY_TO(WalkUpFrom##TYPE (T)); \ 815 { CODE; } \ 816 return true; \ 817 } 818 819DEF_TRAVERSE_TYPE(BuiltinType, { }) 820 821DEF_TRAVERSE_TYPE(ComplexType, { 822 TRY_TO(TraverseType(T->getElementType())); 823 }) 824 825DEF_TRAVERSE_TYPE(PointerType, { 826 TRY_TO(TraverseType(T->getPointeeType())); 827 }) 828 829DEF_TRAVERSE_TYPE(BlockPointerType, { 830 TRY_TO(TraverseType(T->getPointeeType())); 831 }) 832 833DEF_TRAVERSE_TYPE(LValueReferenceType, { 834 TRY_TO(TraverseType(T->getPointeeType())); 835 }) 836 837DEF_TRAVERSE_TYPE(RValueReferenceType, { 838 TRY_TO(TraverseType(T->getPointeeType())); 839 }) 840 841DEF_TRAVERSE_TYPE(MemberPointerType, { 842 TRY_TO(TraverseType(QualType(T->getClass(), 0))); 843 TRY_TO(TraverseType(T->getPointeeType())); 844 }) 845 846DEF_TRAVERSE_TYPE(ConstantArrayType, { 847 TRY_TO(TraverseType(T->getElementType())); 848 }) 849 850DEF_TRAVERSE_TYPE(IncompleteArrayType, { 851 TRY_TO(TraverseType(T->getElementType())); 852 }) 853 854DEF_TRAVERSE_TYPE(VariableArrayType, { 855 TRY_TO(TraverseType(T->getElementType())); 856 TRY_TO(TraverseStmt(T->getSizeExpr())); 857 }) 858 859DEF_TRAVERSE_TYPE(DependentSizedArrayType, { 860 TRY_TO(TraverseType(T->getElementType())); 861 if (T->getSizeExpr()) 862 TRY_TO(TraverseStmt(T->getSizeExpr())); 863 }) 864 865DEF_TRAVERSE_TYPE(DependentSizedExtVectorType, { 866 if (T->getSizeExpr()) 867 TRY_TO(TraverseStmt(T->getSizeExpr())); 868 TRY_TO(TraverseType(T->getElementType())); 869 }) 870 871DEF_TRAVERSE_TYPE(VectorType, { 872 TRY_TO(TraverseType(T->getElementType())); 873 }) 874 875DEF_TRAVERSE_TYPE(ExtVectorType, { 876 TRY_TO(TraverseType(T->getElementType())); 877 }) 878 879DEF_TRAVERSE_TYPE(FunctionNoProtoType, { 880 TRY_TO(TraverseType(T->getResultType())); 881 }) 882 883DEF_TRAVERSE_TYPE(FunctionProtoType, { 884 TRY_TO(TraverseType(T->getResultType())); 885 886 for (FunctionProtoType::arg_type_iterator A = T->arg_type_begin(), 887 AEnd = T->arg_type_end(); 888 A != AEnd; ++A) { 889 TRY_TO(TraverseType(*A)); 890 } 891 892 for (FunctionProtoType::exception_iterator E = T->exception_begin(), 893 EEnd = T->exception_end(); 894 E != EEnd; ++E) { 895 TRY_TO(TraverseType(*E)); 896 } 897 }) 898 899DEF_TRAVERSE_TYPE(UnresolvedUsingType, { }) 900DEF_TRAVERSE_TYPE(TypedefType, { }) 901 902DEF_TRAVERSE_TYPE(TypeOfExprType, { 903 TRY_TO(TraverseStmt(T->getUnderlyingExpr())); 904 }) 905 906DEF_TRAVERSE_TYPE(TypeOfType, { 907 TRY_TO(TraverseType(T->getUnderlyingType())); 908 }) 909 910DEF_TRAVERSE_TYPE(DecltypeType, { 911 TRY_TO(TraverseStmt(T->getUnderlyingExpr())); 912 }) 913 914DEF_TRAVERSE_TYPE(UnaryTransformType, { 915 TRY_TO(TraverseType(T->getBaseType())); 916 TRY_TO(TraverseType(T->getUnderlyingType())); 917 }) 918 919DEF_TRAVERSE_TYPE(AutoType, { 920 TRY_TO(TraverseType(T->getDeducedType())); 921 }) 922 923DEF_TRAVERSE_TYPE(RecordType, { }) 924DEF_TRAVERSE_TYPE(EnumType, { }) 925DEF_TRAVERSE_TYPE(TemplateTypeParmType, { }) 926DEF_TRAVERSE_TYPE(SubstTemplateTypeParmType, { }) 927DEF_TRAVERSE_TYPE(SubstTemplateTypeParmPackType, { }) 928 929DEF_TRAVERSE_TYPE(TemplateSpecializationType, { 930 TRY_TO(TraverseTemplateName(T->getTemplateName())); 931 TRY_TO(TraverseTemplateArguments(T->getArgs(), T->getNumArgs())); 932 }) 933 934DEF_TRAVERSE_TYPE(InjectedClassNameType, { }) 935 936DEF_TRAVERSE_TYPE(AttributedType, { 937 TRY_TO(TraverseType(T->getModifiedType())); 938 }) 939 940DEF_TRAVERSE_TYPE(ParenType, { 941 TRY_TO(TraverseType(T->getInnerType())); 942 }) 943 944DEF_TRAVERSE_TYPE(ElaboratedType, { 945 if (T->getQualifier()) { 946 TRY_TO(TraverseNestedNameSpecifier(T->getQualifier())); 947 } 948 TRY_TO(TraverseType(T->getNamedType())); 949 }) 950 951DEF_TRAVERSE_TYPE(DependentNameType, { 952 TRY_TO(TraverseNestedNameSpecifier(T->getQualifier())); 953 }) 954 955DEF_TRAVERSE_TYPE(DependentTemplateSpecializationType, { 956 TRY_TO(TraverseNestedNameSpecifier(T->getQualifier())); 957 TRY_TO(TraverseTemplateArguments(T->getArgs(), T->getNumArgs())); 958 }) 959 960DEF_TRAVERSE_TYPE(PackExpansionType, { 961 TRY_TO(TraverseType(T->getPattern())); 962 }) 963 964DEF_TRAVERSE_TYPE(ObjCInterfaceType, { }) 965 966DEF_TRAVERSE_TYPE(ObjCObjectType, { 967 // We have to watch out here because an ObjCInterfaceType's base 968 // type is itself. 969 if (T->getBaseType().getTypePtr() != T) 970 TRY_TO(TraverseType(T->getBaseType())); 971 }) 972 973DEF_TRAVERSE_TYPE(ObjCObjectPointerType, { 974 TRY_TO(TraverseType(T->getPointeeType())); 975 }) 976 977DEF_TRAVERSE_TYPE(AtomicType, { 978 TRY_TO(TraverseType(T->getValueType())); 979 }) 980 981#undef DEF_TRAVERSE_TYPE 982 983// ----------------- TypeLoc traversal ----------------- 984 985// This macro makes available a variable TL, the passed-in TypeLoc. 986// If requested, it calls WalkUpFrom* for the Type in the given TypeLoc, 987// in addition to WalkUpFrom* for the TypeLoc itself, such that existing 988// clients that override the WalkUpFrom*Type() and/or Visit*Type() methods 989// continue to work. 990#define DEF_TRAVERSE_TYPELOC(TYPE, CODE) \ 991 template<typename Derived> \ 992 bool RecursiveASTVisitor<Derived>::Traverse##TYPE##Loc(TYPE##Loc TL) { \ 993 if (getDerived().shouldWalkTypesOfTypeLocs()) \ 994 TRY_TO(WalkUpFrom##TYPE(const_cast<TYPE*>(TL.getTypePtr()))); \ 995 TRY_TO(WalkUpFrom##TYPE##Loc(TL)); \ 996 { CODE; } \ 997 return true; \ 998 } 999 1000template<typename Derived> 1001bool RecursiveASTVisitor<Derived>::TraverseQualifiedTypeLoc( 1002 QualifiedTypeLoc TL) { 1003 // Move this over to the 'main' typeloc tree. Note that this is a 1004 // move -- we pretend that we were really looking at the unqualified 1005 // typeloc all along -- rather than a recursion, so we don't follow 1006 // the normal CRTP plan of going through 1007 // getDerived().TraverseTypeLoc. If we did, we'd be traversing 1008 // twice for the same type (once as a QualifiedTypeLoc version of 1009 // the type, once as an UnqualifiedTypeLoc version of the type), 1010 // which in effect means we'd call VisitTypeLoc twice with the 1011 // 'same' type. This solves that problem, at the cost of never 1012 // seeing the qualified version of the type (unless the client 1013 // subclasses TraverseQualifiedTypeLoc themselves). It's not a 1014 // perfect solution. A perfect solution probably requires making 1015 // QualifiedTypeLoc a wrapper around TypeLoc -- like QualType is a 1016 // wrapper around Type* -- rather than being its own class in the 1017 // type hierarchy. 1018 return TraverseTypeLoc(TL.getUnqualifiedLoc()); 1019} 1020 1021DEF_TRAVERSE_TYPELOC(BuiltinType, { }) 1022 1023// FIXME: ComplexTypeLoc is unfinished 1024DEF_TRAVERSE_TYPELOC(ComplexType, { 1025 TRY_TO(TraverseType(TL.getTypePtr()->getElementType())); 1026 }) 1027 1028DEF_TRAVERSE_TYPELOC(PointerType, { 1029 TRY_TO(TraverseTypeLoc(TL.getPointeeLoc())); 1030 }) 1031 1032DEF_TRAVERSE_TYPELOC(BlockPointerType, { 1033 TRY_TO(TraverseTypeLoc(TL.getPointeeLoc())); 1034 }) 1035 1036DEF_TRAVERSE_TYPELOC(LValueReferenceType, { 1037 TRY_TO(TraverseTypeLoc(TL.getPointeeLoc())); 1038 }) 1039 1040DEF_TRAVERSE_TYPELOC(RValueReferenceType, { 1041 TRY_TO(TraverseTypeLoc(TL.getPointeeLoc())); 1042 }) 1043 1044// FIXME: location of base class? 1045// We traverse this in the type case as well, but how is it not reached through 1046// the pointee type? 1047DEF_TRAVERSE_TYPELOC(MemberPointerType, { 1048 TRY_TO(TraverseType(QualType(TL.getTypePtr()->getClass(), 0))); 1049 TRY_TO(TraverseTypeLoc(TL.getPointeeLoc())); 1050 }) 1051 1052template<typename Derived> 1053bool RecursiveASTVisitor<Derived>::TraverseArrayTypeLocHelper(ArrayTypeLoc TL) { 1054 // This isn't available for ArrayType, but is for the ArrayTypeLoc. 1055 TRY_TO(TraverseStmt(TL.getSizeExpr())); 1056 return true; 1057} 1058 1059DEF_TRAVERSE_TYPELOC(ConstantArrayType, { 1060 TRY_TO(TraverseTypeLoc(TL.getElementLoc())); 1061 return TraverseArrayTypeLocHelper(TL); 1062 }) 1063 1064DEF_TRAVERSE_TYPELOC(IncompleteArrayType, { 1065 TRY_TO(TraverseTypeLoc(TL.getElementLoc())); 1066 return TraverseArrayTypeLocHelper(TL); 1067 }) 1068 1069DEF_TRAVERSE_TYPELOC(VariableArrayType, { 1070 TRY_TO(TraverseTypeLoc(TL.getElementLoc())); 1071 return TraverseArrayTypeLocHelper(TL); 1072 }) 1073 1074DEF_TRAVERSE_TYPELOC(DependentSizedArrayType, { 1075 TRY_TO(TraverseTypeLoc(TL.getElementLoc())); 1076 return TraverseArrayTypeLocHelper(TL); 1077 }) 1078 1079// FIXME: order? why not size expr first? 1080// FIXME: base VectorTypeLoc is unfinished 1081DEF_TRAVERSE_TYPELOC(DependentSizedExtVectorType, { 1082 if (TL.getTypePtr()->getSizeExpr()) 1083 TRY_TO(TraverseStmt(TL.getTypePtr()->getSizeExpr())); 1084 TRY_TO(TraverseType(TL.getTypePtr()->getElementType())); 1085 }) 1086 1087// FIXME: VectorTypeLoc is unfinished 1088DEF_TRAVERSE_TYPELOC(VectorType, { 1089 TRY_TO(TraverseType(TL.getTypePtr()->getElementType())); 1090 }) 1091 1092// FIXME: size and attributes 1093// FIXME: base VectorTypeLoc is unfinished 1094DEF_TRAVERSE_TYPELOC(ExtVectorType, { 1095 TRY_TO(TraverseType(TL.getTypePtr()->getElementType())); 1096 }) 1097 1098DEF_TRAVERSE_TYPELOC(FunctionNoProtoType, { 1099 TRY_TO(TraverseTypeLoc(TL.getResultLoc())); 1100 }) 1101 1102// FIXME: location of exception specifications (attributes?) 1103DEF_TRAVERSE_TYPELOC(FunctionProtoType, { 1104 TRY_TO(TraverseTypeLoc(TL.getResultLoc())); 1105 1106 const FunctionProtoType *T = TL.getTypePtr(); 1107 1108 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) { 1109 if (TL.getArg(I)) { 1110 TRY_TO(TraverseDecl(TL.getArg(I))); 1111 } else if (I < T->getNumArgs()) { 1112 TRY_TO(TraverseType(T->getArgType(I))); 1113 } 1114 } 1115 1116 for (FunctionProtoType::exception_iterator E = T->exception_begin(), 1117 EEnd = T->exception_end(); 1118 E != EEnd; ++E) { 1119 TRY_TO(TraverseType(*E)); 1120 } 1121 }) 1122 1123DEF_TRAVERSE_TYPELOC(UnresolvedUsingType, { }) 1124DEF_TRAVERSE_TYPELOC(TypedefType, { }) 1125 1126DEF_TRAVERSE_TYPELOC(TypeOfExprType, { 1127 TRY_TO(TraverseStmt(TL.getUnderlyingExpr())); 1128 }) 1129 1130DEF_TRAVERSE_TYPELOC(TypeOfType, { 1131 TRY_TO(TraverseTypeLoc(TL.getUnderlyingTInfo()->getTypeLoc())); 1132 }) 1133 1134// FIXME: location of underlying expr 1135DEF_TRAVERSE_TYPELOC(DecltypeType, { 1136 TRY_TO(TraverseStmt(TL.getTypePtr()->getUnderlyingExpr())); 1137 }) 1138 1139DEF_TRAVERSE_TYPELOC(UnaryTransformType, { 1140 TRY_TO(TraverseTypeLoc(TL.getUnderlyingTInfo()->getTypeLoc())); 1141 }) 1142 1143DEF_TRAVERSE_TYPELOC(AutoType, { 1144 TRY_TO(TraverseType(TL.getTypePtr()->getDeducedType())); 1145 }) 1146 1147DEF_TRAVERSE_TYPELOC(RecordType, { }) 1148DEF_TRAVERSE_TYPELOC(EnumType, { }) 1149DEF_TRAVERSE_TYPELOC(TemplateTypeParmType, { }) 1150DEF_TRAVERSE_TYPELOC(SubstTemplateTypeParmType, { }) 1151DEF_TRAVERSE_TYPELOC(SubstTemplateTypeParmPackType, { }) 1152 1153// FIXME: use the loc for the template name? 1154DEF_TRAVERSE_TYPELOC(TemplateSpecializationType, { 1155 TRY_TO(TraverseTemplateName(TL.getTypePtr()->getTemplateName())); 1156 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) { 1157 TRY_TO(TraverseTemplateArgumentLoc(TL.getArgLoc(I))); 1158 } 1159 }) 1160 1161DEF_TRAVERSE_TYPELOC(InjectedClassNameType, { }) 1162 1163DEF_TRAVERSE_TYPELOC(ParenType, { 1164 TRY_TO(TraverseTypeLoc(TL.getInnerLoc())); 1165 }) 1166 1167DEF_TRAVERSE_TYPELOC(AttributedType, { 1168 TRY_TO(TraverseTypeLoc(TL.getModifiedLoc())); 1169 }) 1170 1171DEF_TRAVERSE_TYPELOC(ElaboratedType, { 1172 if (TL.getQualifierLoc()) { 1173 TRY_TO(TraverseNestedNameSpecifierLoc(TL.getQualifierLoc())); 1174 } 1175 TRY_TO(TraverseTypeLoc(TL.getNamedTypeLoc())); 1176 }) 1177 1178DEF_TRAVERSE_TYPELOC(DependentNameType, { 1179 TRY_TO(TraverseNestedNameSpecifierLoc(TL.getQualifierLoc())); 1180 }) 1181 1182DEF_TRAVERSE_TYPELOC(DependentTemplateSpecializationType, { 1183 if (TL.getQualifierLoc()) { 1184 TRY_TO(TraverseNestedNameSpecifierLoc(TL.getQualifierLoc())); 1185 } 1186 1187 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) { 1188 TRY_TO(TraverseTemplateArgumentLoc(TL.getArgLoc(I))); 1189 } 1190 }) 1191 1192DEF_TRAVERSE_TYPELOC(PackExpansionType, { 1193 TRY_TO(TraverseTypeLoc(TL.getPatternLoc())); 1194 }) 1195 1196DEF_TRAVERSE_TYPELOC(ObjCInterfaceType, { }) 1197 1198DEF_TRAVERSE_TYPELOC(ObjCObjectType, { 1199 // We have to watch out here because an ObjCInterfaceType's base 1200 // type is itself. 1201 if (TL.getTypePtr()->getBaseType().getTypePtr() != TL.getTypePtr()) 1202 TRY_TO(TraverseTypeLoc(TL.getBaseLoc())); 1203 }) 1204 1205DEF_TRAVERSE_TYPELOC(ObjCObjectPointerType, { 1206 TRY_TO(TraverseTypeLoc(TL.getPointeeLoc())); 1207 }) 1208 1209DEF_TRAVERSE_TYPELOC(AtomicType, { 1210 TRY_TO(TraverseTypeLoc(TL.getValueLoc())); 1211 }) 1212 1213#undef DEF_TRAVERSE_TYPELOC 1214 1215// ----------------- Decl traversal ----------------- 1216// 1217// For a Decl, we automate (in the DEF_TRAVERSE_DECL macro) traversing 1218// the children that come from the DeclContext associated with it. 1219// Therefore each Traverse* only needs to worry about children other 1220// than those. 1221 1222template<typename Derived> 1223bool RecursiveASTVisitor<Derived>::TraverseDeclContextHelper(DeclContext *DC) { 1224 if (!DC) 1225 return true; 1226 1227 for (DeclContext::decl_iterator Child = DC->decls_begin(), 1228 ChildEnd = DC->decls_end(); 1229 Child != ChildEnd; ++Child) { 1230 // BlockDecls are traversed through BlockExprs. 1231 if (!isa<BlockDecl>(*Child)) 1232 TRY_TO(TraverseDecl(*Child)); 1233 } 1234 1235 return true; 1236} 1237 1238// This macro makes available a variable D, the passed-in decl. 1239#define DEF_TRAVERSE_DECL(DECL, CODE) \ 1240template<typename Derived> \ 1241bool RecursiveASTVisitor<Derived>::Traverse##DECL (DECL *D) { \ 1242 TRY_TO(WalkUpFrom##DECL (D)); \ 1243 { CODE; } \ 1244 TRY_TO(TraverseDeclContextHelper(dyn_cast<DeclContext>(D))); \ 1245 return true; \ 1246} 1247 1248DEF_TRAVERSE_DECL(AccessSpecDecl, { }) 1249 1250DEF_TRAVERSE_DECL(BlockDecl, { 1251 if (TypeSourceInfo *TInfo = D->getSignatureAsWritten()) 1252 TRY_TO(TraverseTypeLoc(TInfo->getTypeLoc())); 1253 TRY_TO(TraverseStmt(D->getBody())); 1254 // This return statement makes sure the traversal of nodes in 1255 // decls_begin()/decls_end() (done in the DEF_TRAVERSE_DECL macro) 1256 // is skipped - don't remove it. 1257 return true; 1258 }) 1259 1260DEF_TRAVERSE_DECL(EmptyDecl, { }) 1261 1262DEF_TRAVERSE_DECL(FileScopeAsmDecl, { 1263 TRY_TO(TraverseStmt(D->getAsmString())); 1264 }) 1265 1266DEF_TRAVERSE_DECL(ImportDecl, { }) 1267 1268DEF_TRAVERSE_DECL(FriendDecl, { 1269 // Friend is either decl or a type. 1270 if (D->getFriendType()) 1271 TRY_TO(TraverseTypeLoc(D->getFriendType()->getTypeLoc())); 1272 else 1273 TRY_TO(TraverseDecl(D->getFriendDecl())); 1274 }) 1275 1276DEF_TRAVERSE_DECL(FriendTemplateDecl, { 1277 if (D->getFriendType()) 1278 TRY_TO(TraverseTypeLoc(D->getFriendType()->getTypeLoc())); 1279 else 1280 TRY_TO(TraverseDecl(D->getFriendDecl())); 1281 for (unsigned I = 0, E = D->getNumTemplateParameters(); I < E; ++I) { 1282 TemplateParameterList *TPL = D->getTemplateParameterList(I); 1283 for (TemplateParameterList::iterator ITPL = TPL->begin(), 1284 ETPL = TPL->end(); 1285 ITPL != ETPL; ++ITPL) { 1286 TRY_TO(TraverseDecl(*ITPL)); 1287 } 1288 } 1289 }) 1290 1291DEF_TRAVERSE_DECL(ClassScopeFunctionSpecializationDecl, { 1292 TRY_TO(TraverseDecl(D->getSpecialization())); 1293 1294 if (D->hasExplicitTemplateArgs()) { 1295 const TemplateArgumentListInfo& args = D->templateArgs(); 1296 TRY_TO(TraverseTemplateArgumentLocsHelper( 1297 args.getArgumentArray(), args.size())); 1298 } 1299 }) 1300 1301DEF_TRAVERSE_DECL(LinkageSpecDecl, { }) 1302 1303DEF_TRAVERSE_DECL(ObjCPropertyImplDecl, { 1304 // FIXME: implement this 1305 }) 1306 1307DEF_TRAVERSE_DECL(StaticAssertDecl, { 1308 TRY_TO(TraverseStmt(D->getAssertExpr())); 1309 TRY_TO(TraverseStmt(D->getMessage())); 1310 }) 1311 1312DEF_TRAVERSE_DECL(TranslationUnitDecl, { 1313 // Code in an unnamed namespace shows up automatically in 1314 // decls_begin()/decls_end(). Thus we don't need to recurse on 1315 // D->getAnonymousNamespace(). 1316 }) 1317 1318DEF_TRAVERSE_DECL(NamespaceAliasDecl, { 1319 // We shouldn't traverse an aliased namespace, since it will be 1320 // defined (and, therefore, traversed) somewhere else. 1321 // 1322 // This return statement makes sure the traversal of nodes in 1323 // decls_begin()/decls_end() (done in the DEF_TRAVERSE_DECL macro) 1324 // is skipped - don't remove it. 1325 return true; 1326 }) 1327 1328DEF_TRAVERSE_DECL(LabelDecl, { 1329 // There is no code in a LabelDecl. 1330}) 1331 1332 1333DEF_TRAVERSE_DECL(NamespaceDecl, { 1334 // Code in an unnamed namespace shows up automatically in 1335 // decls_begin()/decls_end(). Thus we don't need to recurse on 1336 // D->getAnonymousNamespace(). 1337 }) 1338 1339DEF_TRAVERSE_DECL(ObjCCompatibleAliasDecl, { 1340 // FIXME: implement 1341 }) 1342 1343DEF_TRAVERSE_DECL(ObjCCategoryDecl, { 1344 // FIXME: implement 1345 }) 1346 1347DEF_TRAVERSE_DECL(ObjCCategoryImplDecl, { 1348 // FIXME: implement 1349 }) 1350 1351DEF_TRAVERSE_DECL(ObjCImplementationDecl, { 1352 // FIXME: implement 1353 }) 1354 1355DEF_TRAVERSE_DECL(ObjCInterfaceDecl, { 1356 // FIXME: implement 1357 }) 1358 1359DEF_TRAVERSE_DECL(ObjCProtocolDecl, { 1360 // FIXME: implement 1361 }) 1362 1363DEF_TRAVERSE_DECL(ObjCMethodDecl, { 1364 if (D->getResultTypeSourceInfo()) { 1365 TRY_TO(TraverseTypeLoc(D->getResultTypeSourceInfo()->getTypeLoc())); 1366 } 1367 for (ObjCMethodDecl::param_iterator 1368 I = D->param_begin(), E = D->param_end(); I != E; ++I) { 1369 TRY_TO(TraverseDecl(*I)); 1370 } 1371 if (D->isThisDeclarationADefinition()) { 1372 TRY_TO(TraverseStmt(D->getBody())); 1373 } 1374 return true; 1375 }) 1376 1377DEF_TRAVERSE_DECL(ObjCPropertyDecl, { 1378 // FIXME: implement 1379 }) 1380 1381DEF_TRAVERSE_DECL(UsingDecl, { 1382 TRY_TO(TraverseNestedNameSpecifierLoc(D->getQualifierLoc())); 1383 TRY_TO(TraverseDeclarationNameInfo(D->getNameInfo())); 1384 }) 1385 1386DEF_TRAVERSE_DECL(UsingDirectiveDecl, { 1387 TRY_TO(TraverseNestedNameSpecifierLoc(D->getQualifierLoc())); 1388 }) 1389 1390DEF_TRAVERSE_DECL(UsingShadowDecl, { }) 1391 1392// A helper method for TemplateDecl's children. 1393template<typename Derived> 1394bool RecursiveASTVisitor<Derived>::TraverseTemplateParameterListHelper( 1395 TemplateParameterList *TPL) { 1396 if (TPL) { 1397 for (TemplateParameterList::iterator I = TPL->begin(), E = TPL->end(); 1398 I != E; ++I) { 1399 TRY_TO(TraverseDecl(*I)); 1400 } 1401 } 1402 return true; 1403} 1404 1405// A helper method for traversing the implicit instantiations of a 1406// class template. 1407template<typename Derived> 1408bool RecursiveASTVisitor<Derived>::TraverseClassInstantiations( 1409 ClassTemplateDecl *D) { 1410 ClassTemplateDecl::spec_iterator end = D->spec_end(); 1411 for (ClassTemplateDecl::spec_iterator it = D->spec_begin(); it != end; ++it) { 1412 ClassTemplateSpecializationDecl* SD = *it; 1413 1414 switch (SD->getSpecializationKind()) { 1415 // Visit the implicit instantiations with the requested pattern. 1416 case TSK_Undeclared: 1417 case TSK_ImplicitInstantiation: 1418 TRY_TO(TraverseDecl(SD)); 1419 break; 1420 1421 // We don't need to do anything on an explicit instantiation 1422 // or explicit specialization because there will be an explicit 1423 // node for it elsewhere. 1424 case TSK_ExplicitInstantiationDeclaration: 1425 case TSK_ExplicitInstantiationDefinition: 1426 case TSK_ExplicitSpecialization: 1427 break; 1428 } 1429 } 1430 1431 return true; 1432} 1433 1434DEF_TRAVERSE_DECL(ClassTemplateDecl, { 1435 CXXRecordDecl* TempDecl = D->getTemplatedDecl(); 1436 TRY_TO(TraverseDecl(TempDecl)); 1437 TRY_TO(TraverseTemplateParameterListHelper(D->getTemplateParameters())); 1438 1439 // By default, we do not traverse the instantiations of 1440 // class templates since they do not appear in the user code. The 1441 // following code optionally traverses them. 1442 // 1443 // We only traverse the class instantiations when we see the canonical 1444 // declaration of the template, to ensure we only visit them once. 1445 if (getDerived().shouldVisitTemplateInstantiations() && 1446 D == D->getCanonicalDecl()) 1447 TRY_TO(TraverseClassInstantiations(D)); 1448 1449 // Note that getInstantiatedFromMemberTemplate() is just a link 1450 // from a template instantiation back to the template from which 1451 // it was instantiated, and thus should not be traversed. 1452 }) 1453 1454// A helper method for traversing the instantiations of a 1455// function while skipping its specializations. 1456template<typename Derived> 1457bool RecursiveASTVisitor<Derived>::TraverseFunctionInstantiations( 1458 FunctionTemplateDecl *D) { 1459 FunctionTemplateDecl::spec_iterator end = D->spec_end(); 1460 for (FunctionTemplateDecl::spec_iterator it = D->spec_begin(); it != end; 1461 ++it) { 1462 FunctionDecl* FD = *it; 1463 switch (FD->getTemplateSpecializationKind()) { 1464 case TSK_Undeclared: 1465 case TSK_ImplicitInstantiation: 1466 // We don't know what kind of FunctionDecl this is. 1467 TRY_TO(TraverseDecl(FD)); 1468 break; 1469 1470 // FIXME: For now traverse explicit instantiations here. Change that 1471 // once they are represented as dedicated nodes in the AST. 1472 case TSK_ExplicitInstantiationDeclaration: 1473 case TSK_ExplicitInstantiationDefinition: 1474 TRY_TO(TraverseDecl(FD)); 1475 break; 1476 1477 case TSK_ExplicitSpecialization: 1478 break; 1479 } 1480 } 1481 1482 return true; 1483} 1484 1485DEF_TRAVERSE_DECL(FunctionTemplateDecl, { 1486 TRY_TO(TraverseDecl(D->getTemplatedDecl())); 1487 TRY_TO(TraverseTemplateParameterListHelper(D->getTemplateParameters())); 1488 1489 // By default, we do not traverse the instantiations of 1490 // function templates since they do not appear in the user code. The 1491 // following code optionally traverses them. 1492 // 1493 // We only traverse the function instantiations when we see the canonical 1494 // declaration of the template, to ensure we only visit them once. 1495 if (getDerived().shouldVisitTemplateInstantiations() && 1496 D == D->getCanonicalDecl()) 1497 TRY_TO(TraverseFunctionInstantiations(D)); 1498 }) 1499 1500DEF_TRAVERSE_DECL(TemplateTemplateParmDecl, { 1501 // D is the "T" in something like 1502 // template <template <typename> class T> class container { }; 1503 TRY_TO(TraverseDecl(D->getTemplatedDecl())); 1504 if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited()) { 1505 TRY_TO(TraverseTemplateArgumentLoc(D->getDefaultArgument())); 1506 } 1507 TRY_TO(TraverseTemplateParameterListHelper(D->getTemplateParameters())); 1508 }) 1509 1510DEF_TRAVERSE_DECL(TemplateTypeParmDecl, { 1511 // D is the "T" in something like "template<typename T> class vector;" 1512 if (D->getTypeForDecl()) 1513 TRY_TO(TraverseType(QualType(D->getTypeForDecl(), 0))); 1514 if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited()) 1515 TRY_TO(TraverseTypeLoc(D->getDefaultArgumentInfo()->getTypeLoc())); 1516 }) 1517 1518DEF_TRAVERSE_DECL(TypedefDecl, { 1519 TRY_TO(TraverseTypeLoc(D->getTypeSourceInfo()->getTypeLoc())); 1520 // We shouldn't traverse D->getTypeForDecl(); it's a result of 1521 // declaring the typedef, not something that was written in the 1522 // source. 1523 }) 1524 1525DEF_TRAVERSE_DECL(TypeAliasDecl, { 1526 TRY_TO(TraverseTypeLoc(D->getTypeSourceInfo()->getTypeLoc())); 1527 // We shouldn't traverse D->getTypeForDecl(); it's a result of 1528 // declaring the type alias, not something that was written in the 1529 // source. 1530 }) 1531 1532DEF_TRAVERSE_DECL(TypeAliasTemplateDecl, { 1533 TRY_TO(TraverseDecl(D->getTemplatedDecl())); 1534 TRY_TO(TraverseTemplateParameterListHelper(D->getTemplateParameters())); 1535 }) 1536 1537DEF_TRAVERSE_DECL(UnresolvedUsingTypenameDecl, { 1538 // A dependent using declaration which was marked with 'typename'. 1539 // template<class T> class A : public B<T> { using typename B<T>::foo; }; 1540 TRY_TO(TraverseNestedNameSpecifierLoc(D->getQualifierLoc())); 1541 // We shouldn't traverse D->getTypeForDecl(); it's a result of 1542 // declaring the type, not something that was written in the 1543 // source. 1544 }) 1545 1546DEF_TRAVERSE_DECL(EnumDecl, { 1547 if (D->getTypeForDecl()) 1548 TRY_TO(TraverseType(QualType(D->getTypeForDecl(), 0))); 1549 1550 TRY_TO(TraverseNestedNameSpecifierLoc(D->getQualifierLoc())); 1551 // The enumerators are already traversed by 1552 // decls_begin()/decls_end(). 1553 }) 1554 1555 1556// Helper methods for RecordDecl and its children. 1557template<typename Derived> 1558bool RecursiveASTVisitor<Derived>::TraverseRecordHelper( 1559 RecordDecl *D) { 1560 // We shouldn't traverse D->getTypeForDecl(); it's a result of 1561 // declaring the type, not something that was written in the source. 1562 1563 TRY_TO(TraverseNestedNameSpecifierLoc(D->getQualifierLoc())); 1564 return true; 1565} 1566 1567template<typename Derived> 1568bool RecursiveASTVisitor<Derived>::TraverseCXXRecordHelper( 1569 CXXRecordDecl *D) { 1570 if (!TraverseRecordHelper(D)) 1571 return false; 1572 if (D->isCompleteDefinition()) { 1573 for (CXXRecordDecl::base_class_iterator I = D->bases_begin(), 1574 E = D->bases_end(); 1575 I != E; ++I) { 1576 TRY_TO(TraverseTypeLoc(I->getTypeSourceInfo()->getTypeLoc())); 1577 } 1578 // We don't traverse the friends or the conversions, as they are 1579 // already in decls_begin()/decls_end(). 1580 } 1581 return true; 1582} 1583 1584DEF_TRAVERSE_DECL(RecordDecl, { 1585 TRY_TO(TraverseRecordHelper(D)); 1586 }) 1587 1588DEF_TRAVERSE_DECL(CXXRecordDecl, { 1589 TRY_TO(TraverseCXXRecordHelper(D)); 1590 }) 1591 1592DEF_TRAVERSE_DECL(ClassTemplateSpecializationDecl, { 1593 // For implicit instantiations ("set<int> x;"), we don't want to 1594 // recurse at all, since the instatiated class isn't written in 1595 // the source code anywhere. (Note the instatiated *type* -- 1596 // set<int> -- is written, and will still get a callback of 1597 // TemplateSpecializationType). For explicit instantiations 1598 // ("template set<int>;"), we do need a callback, since this 1599 // is the only callback that's made for this instantiation. 1600 // We use getTypeAsWritten() to distinguish. 1601 if (TypeSourceInfo *TSI = D->getTypeAsWritten()) 1602 TRY_TO(TraverseTypeLoc(TSI->getTypeLoc())); 1603 1604 if (!getDerived().shouldVisitTemplateInstantiations() && 1605 D->getTemplateSpecializationKind() != TSK_ExplicitSpecialization) 1606 // Returning from here skips traversing the 1607 // declaration context of the ClassTemplateSpecializationDecl 1608 // (embedded in the DEF_TRAVERSE_DECL() macro) 1609 // which contains the instantiated members of the class. 1610 return true; 1611 }) 1612 1613template <typename Derived> 1614bool RecursiveASTVisitor<Derived>::TraverseTemplateArgumentLocsHelper( 1615 const TemplateArgumentLoc *TAL, unsigned Count) { 1616 for (unsigned I = 0; I < Count; ++I) { 1617 TRY_TO(TraverseTemplateArgumentLoc(TAL[I])); 1618 } 1619 return true; 1620} 1621 1622DEF_TRAVERSE_DECL(ClassTemplatePartialSpecializationDecl, { 1623 // The partial specialization. 1624 if (TemplateParameterList *TPL = D->getTemplateParameters()) { 1625 for (TemplateParameterList::iterator I = TPL->begin(), E = TPL->end(); 1626 I != E; ++I) { 1627 TRY_TO(TraverseDecl(*I)); 1628 } 1629 } 1630 // The args that remains unspecialized. 1631 TRY_TO(TraverseTemplateArgumentLocsHelper( 1632 D->getTemplateArgsAsWritten(), D->getNumTemplateArgsAsWritten())); 1633 1634 // Don't need the ClassTemplatePartialSpecializationHelper, even 1635 // though that's our parent class -- we already visit all the 1636 // template args here. 1637 TRY_TO(TraverseCXXRecordHelper(D)); 1638 1639 // Instantiations will have been visited with the primary template. 1640 }) 1641 1642DEF_TRAVERSE_DECL(EnumConstantDecl, { 1643 TRY_TO(TraverseStmt(D->getInitExpr())); 1644 }) 1645 1646DEF_TRAVERSE_DECL(UnresolvedUsingValueDecl, { 1647 // Like UnresolvedUsingTypenameDecl, but without the 'typename': 1648 // template <class T> Class A : public Base<T> { using Base<T>::foo; }; 1649 TRY_TO(TraverseNestedNameSpecifierLoc(D->getQualifierLoc())); 1650 TRY_TO(TraverseDeclarationNameInfo(D->getNameInfo())); 1651 }) 1652 1653DEF_TRAVERSE_DECL(IndirectFieldDecl, {}) 1654 1655template<typename Derived> 1656bool RecursiveASTVisitor<Derived>::TraverseDeclaratorHelper(DeclaratorDecl *D) { 1657 TRY_TO(TraverseNestedNameSpecifierLoc(D->getQualifierLoc())); 1658 if (D->getTypeSourceInfo()) 1659 TRY_TO(TraverseTypeLoc(D->getTypeSourceInfo()->getTypeLoc())); 1660 else 1661 TRY_TO(TraverseType(D->getType())); 1662 return true; 1663} 1664 1665DEF_TRAVERSE_DECL(FieldDecl, { 1666 TRY_TO(TraverseDeclaratorHelper(D)); 1667 if (D->isBitField()) 1668 TRY_TO(TraverseStmt(D->getBitWidth())); 1669 else if (D->hasInClassInitializer()) 1670 TRY_TO(TraverseStmt(D->getInClassInitializer())); 1671 }) 1672 1673DEF_TRAVERSE_DECL(ObjCAtDefsFieldDecl, { 1674 TRY_TO(TraverseDeclaratorHelper(D)); 1675 if (D->isBitField()) 1676 TRY_TO(TraverseStmt(D->getBitWidth())); 1677 // FIXME: implement the rest. 1678 }) 1679 1680DEF_TRAVERSE_DECL(ObjCIvarDecl, { 1681 TRY_TO(TraverseDeclaratorHelper(D)); 1682 if (D->isBitField()) 1683 TRY_TO(TraverseStmt(D->getBitWidth())); 1684 // FIXME: implement the rest. 1685 }) 1686 1687template<typename Derived> 1688bool RecursiveASTVisitor<Derived>::TraverseFunctionHelper(FunctionDecl *D) { 1689 TRY_TO(TraverseNestedNameSpecifierLoc(D->getQualifierLoc())); 1690 TRY_TO(TraverseDeclarationNameInfo(D->getNameInfo())); 1691 1692 // If we're an explicit template specialization, iterate over the 1693 // template args that were explicitly specified. If we were doing 1694 // this in typing order, we'd do it between the return type and 1695 // the function args, but both are handled by the FunctionTypeLoc 1696 // above, so we have to choose one side. I've decided to do before. 1697 if (const FunctionTemplateSpecializationInfo *FTSI = 1698 D->getTemplateSpecializationInfo()) { 1699 if (FTSI->getTemplateSpecializationKind() != TSK_Undeclared && 1700 FTSI->getTemplateSpecializationKind() != TSK_ImplicitInstantiation) { 1701 // A specialization might not have explicit template arguments if it has 1702 // a templated return type and concrete arguments. 1703 if (const ASTTemplateArgumentListInfo *TALI = 1704 FTSI->TemplateArgumentsAsWritten) { 1705 TRY_TO(TraverseTemplateArgumentLocsHelper(TALI->getTemplateArgs(), 1706 TALI->NumTemplateArgs)); 1707 } 1708 } 1709 } 1710 1711 // Visit the function type itself, which can be either 1712 // FunctionNoProtoType or FunctionProtoType, or a typedef. This 1713 // also covers the return type and the function parameters, 1714 // including exception specifications. 1715 if (TypeSourceInfo *TSI = D->getTypeSourceInfo()) { 1716 TRY_TO(TraverseTypeLoc(TSI->getTypeLoc())); 1717 } 1718 1719 if (CXXConstructorDecl *Ctor = dyn_cast<CXXConstructorDecl>(D)) { 1720 // Constructor initializers. 1721 for (CXXConstructorDecl::init_iterator I = Ctor->init_begin(), 1722 E = Ctor->init_end(); 1723 I != E; ++I) { 1724 TRY_TO(TraverseConstructorInitializer(*I)); 1725 } 1726 } 1727 1728 if (D->isThisDeclarationADefinition()) { 1729 TRY_TO(TraverseStmt(D->getBody())); // Function body. 1730 } 1731 return true; 1732} 1733 1734DEF_TRAVERSE_DECL(FunctionDecl, { 1735 // We skip decls_begin/decls_end, which are already covered by 1736 // TraverseFunctionHelper(). 1737 return TraverseFunctionHelper(D); 1738 }) 1739 1740DEF_TRAVERSE_DECL(CXXMethodDecl, { 1741 // We skip decls_begin/decls_end, which are already covered by 1742 // TraverseFunctionHelper(). 1743 return TraverseFunctionHelper(D); 1744 }) 1745 1746DEF_TRAVERSE_DECL(CXXConstructorDecl, { 1747 // We skip decls_begin/decls_end, which are already covered by 1748 // TraverseFunctionHelper(). 1749 return TraverseFunctionHelper(D); 1750 }) 1751 1752// CXXConversionDecl is the declaration of a type conversion operator. 1753// It's not a cast expression. 1754DEF_TRAVERSE_DECL(CXXConversionDecl, { 1755 // We skip decls_begin/decls_end, which are already covered by 1756 // TraverseFunctionHelper(). 1757 return TraverseFunctionHelper(D); 1758 }) 1759 1760DEF_TRAVERSE_DECL(CXXDestructorDecl, { 1761 // We skip decls_begin/decls_end, which are already covered by 1762 // TraverseFunctionHelper(). 1763 return TraverseFunctionHelper(D); 1764 }) 1765 1766template<typename Derived> 1767bool RecursiveASTVisitor<Derived>::TraverseVarHelper(VarDecl *D) { 1768 TRY_TO(TraverseDeclaratorHelper(D)); 1769 // Default params are taken care of when we traverse the ParmVarDecl. 1770 if (!isa<ParmVarDecl>(D) && 1771 (!D->isCXXForRangeDecl() || getDerived().shouldVisitImplicitCode())) 1772 TRY_TO(TraverseStmt(D->getInit())); 1773 return true; 1774} 1775 1776DEF_TRAVERSE_DECL(VarDecl, { 1777 TRY_TO(TraverseVarHelper(D)); 1778 }) 1779 1780DEF_TRAVERSE_DECL(ImplicitParamDecl, { 1781 TRY_TO(TraverseVarHelper(D)); 1782 }) 1783 1784DEF_TRAVERSE_DECL(NonTypeTemplateParmDecl, { 1785 // A non-type template parameter, e.g. "S" in template<int S> class Foo ... 1786 TRY_TO(TraverseDeclaratorHelper(D)); 1787 if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited()) 1788 TRY_TO(TraverseStmt(D->getDefaultArgument())); 1789 }) 1790 1791DEF_TRAVERSE_DECL(ParmVarDecl, { 1792 TRY_TO(TraverseVarHelper(D)); 1793 1794 if (D->hasDefaultArg() && 1795 D->hasUninstantiatedDefaultArg() && 1796 !D->hasUnparsedDefaultArg()) 1797 TRY_TO(TraverseStmt(D->getUninstantiatedDefaultArg())); 1798 1799 if (D->hasDefaultArg() && 1800 !D->hasUninstantiatedDefaultArg() && 1801 !D->hasUnparsedDefaultArg()) 1802 TRY_TO(TraverseStmt(D->getDefaultArg())); 1803 }) 1804 1805#undef DEF_TRAVERSE_DECL 1806 1807// ----------------- Stmt traversal ----------------- 1808// 1809// For stmts, we automate (in the DEF_TRAVERSE_STMT macro) iterating 1810// over the children defined in children() (every stmt defines these, 1811// though sometimes the range is empty). Each individual Traverse* 1812// method only needs to worry about children other than those. To see 1813// what children() does for a given class, see, e.g., 1814// http://clang.llvm.org/doxygen/Stmt_8cpp_source.html 1815 1816// This macro makes available a variable S, the passed-in stmt. 1817#define DEF_TRAVERSE_STMT(STMT, CODE) \ 1818template<typename Derived> \ 1819bool RecursiveASTVisitor<Derived>::Traverse##STMT (STMT *S) { \ 1820 TRY_TO(WalkUpFrom##STMT(S)); \ 1821 { CODE; } \ 1822 for (Stmt::child_range range = S->children(); range; ++range) { \ 1823 TRY_TO(TraverseStmt(*range)); \ 1824 } \ 1825 return true; \ 1826} 1827 1828DEF_TRAVERSE_STMT(GCCAsmStmt, { 1829 TRY_TO(TraverseStmt(S->getAsmString())); 1830 for (unsigned I = 0, E = S->getNumInputs(); I < E; ++I) { 1831 TRY_TO(TraverseStmt(S->getInputConstraintLiteral(I))); 1832 } 1833 for (unsigned I = 0, E = S->getNumOutputs(); I < E; ++I) { 1834 TRY_TO(TraverseStmt(S->getOutputConstraintLiteral(I))); 1835 } 1836 for (unsigned I = 0, E = S->getNumClobbers(); I < E; ++I) { 1837 TRY_TO(TraverseStmt(S->getClobberStringLiteral(I))); 1838 } 1839 // children() iterates over inputExpr and outputExpr. 1840 }) 1841 1842DEF_TRAVERSE_STMT(MSAsmStmt, { 1843 // FIXME: MS Asm doesn't currently parse Constraints, Clobbers, etc. Once 1844 // added this needs to be implemented. 1845 }) 1846 1847DEF_TRAVERSE_STMT(CXXCatchStmt, { 1848 TRY_TO(TraverseDecl(S->getExceptionDecl())); 1849 // children() iterates over the handler block. 1850 }) 1851 1852DEF_TRAVERSE_STMT(DeclStmt, { 1853 for (DeclStmt::decl_iterator I = S->decl_begin(), E = S->decl_end(); 1854 I != E; ++I) { 1855 TRY_TO(TraverseDecl(*I)); 1856 } 1857 // Suppress the default iteration over children() by 1858 // returning. Here's why: A DeclStmt looks like 'type var [= 1859 // initializer]'. The decls above already traverse over the 1860 // initializers, so we don't have to do it again (which 1861 // children() would do). 1862 return true; 1863 }) 1864 1865 1866// These non-expr stmts (most of them), do not need any action except 1867// iterating over the children. 1868DEF_TRAVERSE_STMT(BreakStmt, { }) 1869DEF_TRAVERSE_STMT(CXXTryStmt, { }) 1870DEF_TRAVERSE_STMT(CaseStmt, { }) 1871DEF_TRAVERSE_STMT(CompoundStmt, { }) 1872DEF_TRAVERSE_STMT(ContinueStmt, { }) 1873DEF_TRAVERSE_STMT(DefaultStmt, { }) 1874DEF_TRAVERSE_STMT(DoStmt, { }) 1875DEF_TRAVERSE_STMT(ForStmt, { }) 1876DEF_TRAVERSE_STMT(GotoStmt, { }) 1877DEF_TRAVERSE_STMT(IfStmt, { }) 1878DEF_TRAVERSE_STMT(IndirectGotoStmt, { }) 1879DEF_TRAVERSE_STMT(LabelStmt, { }) 1880DEF_TRAVERSE_STMT(AttributedStmt, { }) 1881DEF_TRAVERSE_STMT(NullStmt, { }) 1882DEF_TRAVERSE_STMT(ObjCAtCatchStmt, { }) 1883DEF_TRAVERSE_STMT(ObjCAtFinallyStmt, { }) 1884DEF_TRAVERSE_STMT(ObjCAtSynchronizedStmt, { }) 1885DEF_TRAVERSE_STMT(ObjCAtThrowStmt, { }) 1886DEF_TRAVERSE_STMT(ObjCAtTryStmt, { }) 1887DEF_TRAVERSE_STMT(ObjCForCollectionStmt, { }) 1888DEF_TRAVERSE_STMT(ObjCAutoreleasePoolStmt, { }) 1889DEF_TRAVERSE_STMT(CXXForRangeStmt, { 1890 if (!getDerived().shouldVisitImplicitCode()) { 1891 TRY_TO(TraverseStmt(S->getLoopVarStmt())); 1892 TRY_TO(TraverseStmt(S->getRangeInit())); 1893 TRY_TO(TraverseStmt(S->getBody())); 1894 // Visit everything else only if shouldVisitImplicitCode(). 1895 return true; 1896 } 1897}) 1898DEF_TRAVERSE_STMT(MSDependentExistsStmt, { 1899 TRY_TO(TraverseNestedNameSpecifierLoc(S->getQualifierLoc())); 1900 TRY_TO(TraverseDeclarationNameInfo(S->getNameInfo())); 1901}) 1902DEF_TRAVERSE_STMT(ReturnStmt, { }) 1903DEF_TRAVERSE_STMT(SwitchStmt, { }) 1904DEF_TRAVERSE_STMT(WhileStmt, { }) 1905 1906 1907DEF_TRAVERSE_STMT(CXXDependentScopeMemberExpr, { 1908 TRY_TO(TraverseNestedNameSpecifierLoc(S->getQualifierLoc())); 1909 TRY_TO(TraverseDeclarationNameInfo(S->getMemberNameInfo())); 1910 if (S->hasExplicitTemplateArgs()) { 1911 TRY_TO(TraverseTemplateArgumentLocsHelper( 1912 S->getTemplateArgs(), S->getNumTemplateArgs())); 1913 } 1914 }) 1915 1916DEF_TRAVERSE_STMT(DeclRefExpr, { 1917 TRY_TO(TraverseNestedNameSpecifierLoc(S->getQualifierLoc())); 1918 TRY_TO(TraverseDeclarationNameInfo(S->getNameInfo())); 1919 TRY_TO(TraverseTemplateArgumentLocsHelper( 1920 S->getTemplateArgs(), S->getNumTemplateArgs())); 1921 }) 1922 1923DEF_TRAVERSE_STMT(DependentScopeDeclRefExpr, { 1924 TRY_TO(TraverseNestedNameSpecifierLoc(S->getQualifierLoc())); 1925 TRY_TO(TraverseDeclarationNameInfo(S->getNameInfo())); 1926 if (S->hasExplicitTemplateArgs()) { 1927 TRY_TO(TraverseTemplateArgumentLocsHelper( 1928 S->getExplicitTemplateArgs().getTemplateArgs(), 1929 S->getNumTemplateArgs())); 1930 } 1931 }) 1932 1933DEF_TRAVERSE_STMT(MemberExpr, { 1934 TRY_TO(TraverseNestedNameSpecifierLoc(S->getQualifierLoc())); 1935 TRY_TO(TraverseDeclarationNameInfo(S->getMemberNameInfo())); 1936 TRY_TO(TraverseTemplateArgumentLocsHelper( 1937 S->getTemplateArgs(), S->getNumTemplateArgs())); 1938 }) 1939 1940DEF_TRAVERSE_STMT(ImplicitCastExpr, { 1941 // We don't traverse the cast type, as it's not written in the 1942 // source code. 1943 }) 1944 1945DEF_TRAVERSE_STMT(CStyleCastExpr, { 1946 TRY_TO(TraverseTypeLoc(S->getTypeInfoAsWritten()->getTypeLoc())); 1947 }) 1948 1949DEF_TRAVERSE_STMT(CXXFunctionalCastExpr, { 1950 TRY_TO(TraverseTypeLoc(S->getTypeInfoAsWritten()->getTypeLoc())); 1951 }) 1952 1953DEF_TRAVERSE_STMT(CXXConstCastExpr, { 1954 TRY_TO(TraverseTypeLoc(S->getTypeInfoAsWritten()->getTypeLoc())); 1955 }) 1956 1957DEF_TRAVERSE_STMT(CXXDynamicCastExpr, { 1958 TRY_TO(TraverseTypeLoc(S->getTypeInfoAsWritten()->getTypeLoc())); 1959 }) 1960 1961DEF_TRAVERSE_STMT(CXXReinterpretCastExpr, { 1962 TRY_TO(TraverseTypeLoc(S->getTypeInfoAsWritten()->getTypeLoc())); 1963 }) 1964 1965DEF_TRAVERSE_STMT(CXXStaticCastExpr, { 1966 TRY_TO(TraverseTypeLoc(S->getTypeInfoAsWritten()->getTypeLoc())); 1967 }) 1968 1969// InitListExpr is a tricky one, because we want to do all our work on 1970// the syntactic form of the listexpr, but this method takes the 1971// semantic form by default. We can't use the macro helper because it 1972// calls WalkUp*() on the semantic form, before our code can convert 1973// to the syntactic form. 1974template<typename Derived> 1975bool RecursiveASTVisitor<Derived>::TraverseInitListExpr(InitListExpr *S) { 1976 if (InitListExpr *Syn = S->getSyntacticForm()) 1977 S = Syn; 1978 TRY_TO(WalkUpFromInitListExpr(S)); 1979 // All we need are the default actions. FIXME: use a helper function. 1980 for (Stmt::child_range range = S->children(); range; ++range) { 1981 TRY_TO(TraverseStmt(*range)); 1982 } 1983 return true; 1984} 1985 1986// GenericSelectionExpr is a special case because the types and expressions 1987// are interleaved. We also need to watch out for null types (default 1988// generic associations). 1989template<typename Derived> 1990bool RecursiveASTVisitor<Derived>:: 1991TraverseGenericSelectionExpr(GenericSelectionExpr *S) { 1992 TRY_TO(WalkUpFromGenericSelectionExpr(S)); 1993 TRY_TO(TraverseStmt(S->getControllingExpr())); 1994 for (unsigned i = 0; i != S->getNumAssocs(); ++i) { 1995 if (TypeSourceInfo *TS = S->getAssocTypeSourceInfo(i)) 1996 TRY_TO(TraverseTypeLoc(TS->getTypeLoc())); 1997 TRY_TO(TraverseStmt(S->getAssocExpr(i))); 1998 } 1999 return true; 2000} 2001 2002// PseudoObjectExpr is a special case because of the wierdness with 2003// syntactic expressions and opaque values. 2004template<typename Derived> 2005bool RecursiveASTVisitor<Derived>:: 2006TraversePseudoObjectExpr(PseudoObjectExpr *S) { 2007 TRY_TO(WalkUpFromPseudoObjectExpr(S)); 2008 TRY_TO(TraverseStmt(S->getSyntacticForm())); 2009 for (PseudoObjectExpr::semantics_iterator 2010 i = S->semantics_begin(), e = S->semantics_end(); i != e; ++i) { 2011 Expr *sub = *i; 2012 if (OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(sub)) 2013 sub = OVE->getSourceExpr(); 2014 TRY_TO(TraverseStmt(sub)); 2015 } 2016 return true; 2017} 2018 2019DEF_TRAVERSE_STMT(CXXScalarValueInitExpr, { 2020 // This is called for code like 'return T()' where T is a built-in 2021 // (i.e. non-class) type. 2022 TRY_TO(TraverseTypeLoc(S->getTypeSourceInfo()->getTypeLoc())); 2023 }) 2024 2025DEF_TRAVERSE_STMT(CXXNewExpr, { 2026 // The child-iterator will pick up the other arguments. 2027 TRY_TO(TraverseTypeLoc(S->getAllocatedTypeSourceInfo()->getTypeLoc())); 2028 }) 2029 2030DEF_TRAVERSE_STMT(OffsetOfExpr, { 2031 // The child-iterator will pick up the expression representing 2032 // the field. 2033 // FIMXE: for code like offsetof(Foo, a.b.c), should we get 2034 // making a MemberExpr callbacks for Foo.a, Foo.a.b, and Foo.a.b.c? 2035 TRY_TO(TraverseTypeLoc(S->getTypeSourceInfo()->getTypeLoc())); 2036 }) 2037 2038DEF_TRAVERSE_STMT(UnaryExprOrTypeTraitExpr, { 2039 // The child-iterator will pick up the arg if it's an expression, 2040 // but not if it's a type. 2041 if (S->isArgumentType()) 2042 TRY_TO(TraverseTypeLoc(S->getArgumentTypeInfo()->getTypeLoc())); 2043 }) 2044 2045DEF_TRAVERSE_STMT(CXXTypeidExpr, { 2046 // The child-iterator will pick up the arg if it's an expression, 2047 // but not if it's a type. 2048 if (S->isTypeOperand()) 2049 TRY_TO(TraverseTypeLoc(S->getTypeOperandSourceInfo()->getTypeLoc())); 2050 }) 2051 2052DEF_TRAVERSE_STMT(CXXUuidofExpr, { 2053 // The child-iterator will pick up the arg if it's an expression, 2054 // but not if it's a type. 2055 if (S->isTypeOperand()) 2056 TRY_TO(TraverseTypeLoc(S->getTypeOperandSourceInfo()->getTypeLoc())); 2057 }) 2058 2059DEF_TRAVERSE_STMT(UnaryTypeTraitExpr, { 2060 TRY_TO(TraverseTypeLoc(S->getQueriedTypeSourceInfo()->getTypeLoc())); 2061 }) 2062 2063DEF_TRAVERSE_STMT(BinaryTypeTraitExpr, { 2064 TRY_TO(TraverseTypeLoc(S->getLhsTypeSourceInfo()->getTypeLoc())); 2065 TRY_TO(TraverseTypeLoc(S->getRhsTypeSourceInfo()->getTypeLoc())); 2066 }) 2067 2068DEF_TRAVERSE_STMT(TypeTraitExpr, { 2069 for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I) 2070 TRY_TO(TraverseTypeLoc(S->getArg(I)->getTypeLoc())); 2071}) 2072 2073DEF_TRAVERSE_STMT(ArrayTypeTraitExpr, { 2074 TRY_TO(TraverseTypeLoc(S->getQueriedTypeSourceInfo()->getTypeLoc())); 2075 }) 2076 2077DEF_TRAVERSE_STMT(ExpressionTraitExpr, { 2078 TRY_TO(TraverseStmt(S->getQueriedExpression())); 2079 }) 2080 2081DEF_TRAVERSE_STMT(VAArgExpr, { 2082 // The child-iterator will pick up the expression argument. 2083 TRY_TO(TraverseTypeLoc(S->getWrittenTypeInfo()->getTypeLoc())); 2084 }) 2085 2086DEF_TRAVERSE_STMT(CXXTemporaryObjectExpr, { 2087 // This is called for code like 'return T()' where T is a class type. 2088 TRY_TO(TraverseTypeLoc(S->getTypeSourceInfo()->getTypeLoc())); 2089 }) 2090 2091// Walk only the visible parts of lambda expressions. 2092template<typename Derived> 2093bool RecursiveASTVisitor<Derived>::TraverseLambdaExpr(LambdaExpr *S) { 2094 for (LambdaExpr::capture_iterator C = S->explicit_capture_begin(), 2095 CEnd = S->explicit_capture_end(); 2096 C != CEnd; ++C) { 2097 TRY_TO(TraverseLambdaCapture(*C)); 2098 } 2099 2100 if (S->hasExplicitParameters() || S->hasExplicitResultType()) { 2101 TypeLoc TL = S->getCallOperator()->getTypeSourceInfo()->getTypeLoc(); 2102 if (S->hasExplicitParameters() && S->hasExplicitResultType()) { 2103 // Visit the whole type. 2104 TRY_TO(TraverseTypeLoc(TL)); 2105 } else if (FunctionProtoTypeLoc Proto = TL.getAs<FunctionProtoTypeLoc>()) { 2106 if (S->hasExplicitParameters()) { 2107 // Visit parameters. 2108 for (unsigned I = 0, N = Proto.getNumArgs(); I != N; ++I) { 2109 TRY_TO(TraverseDecl(Proto.getArg(I))); 2110 } 2111 } else { 2112 TRY_TO(TraverseTypeLoc(Proto.getResultLoc())); 2113 } 2114 } 2115 } 2116 2117 TRY_TO(TraverseStmt(S->getBody())); 2118 return true; 2119} 2120 2121DEF_TRAVERSE_STMT(CXXUnresolvedConstructExpr, { 2122 // This is called for code like 'T()', where T is a template argument. 2123 TRY_TO(TraverseTypeLoc(S->getTypeSourceInfo()->getTypeLoc())); 2124 }) 2125 2126// These expressions all might take explicit template arguments. 2127// We traverse those if so. FIXME: implement these. 2128DEF_TRAVERSE_STMT(CXXConstructExpr, { }) 2129DEF_TRAVERSE_STMT(CallExpr, { }) 2130DEF_TRAVERSE_STMT(CXXMemberCallExpr, { }) 2131 2132// These exprs (most of them), do not need any action except iterating 2133// over the children. 2134DEF_TRAVERSE_STMT(AddrLabelExpr, { }) 2135DEF_TRAVERSE_STMT(ArraySubscriptExpr, { }) 2136DEF_TRAVERSE_STMT(BlockExpr, { 2137 TRY_TO(TraverseDecl(S->getBlockDecl())); 2138 return true; // no child statements to loop through. 2139}) 2140DEF_TRAVERSE_STMT(ChooseExpr, { }) 2141DEF_TRAVERSE_STMT(CompoundLiteralExpr, { 2142 TRY_TO(TraverseTypeLoc(S->getTypeSourceInfo()->getTypeLoc())); 2143}) 2144DEF_TRAVERSE_STMT(CXXBindTemporaryExpr, { }) 2145DEF_TRAVERSE_STMT(CXXBoolLiteralExpr, { }) 2146DEF_TRAVERSE_STMT(CXXDefaultArgExpr, { }) 2147DEF_TRAVERSE_STMT(CXXDeleteExpr, { }) 2148DEF_TRAVERSE_STMT(ExprWithCleanups, { }) 2149DEF_TRAVERSE_STMT(CXXNullPtrLiteralExpr, { }) 2150DEF_TRAVERSE_STMT(CXXPseudoDestructorExpr, { 2151 TRY_TO(TraverseNestedNameSpecifierLoc(S->getQualifierLoc())); 2152 if (TypeSourceInfo *ScopeInfo = S->getScopeTypeInfo()) 2153 TRY_TO(TraverseTypeLoc(ScopeInfo->getTypeLoc())); 2154 if (TypeSourceInfo *DestroyedTypeInfo = S->getDestroyedTypeInfo()) 2155 TRY_TO(TraverseTypeLoc(DestroyedTypeInfo->getTypeLoc())); 2156}) 2157DEF_TRAVERSE_STMT(CXXThisExpr, { }) 2158DEF_TRAVERSE_STMT(CXXThrowExpr, { }) 2159DEF_TRAVERSE_STMT(UserDefinedLiteral, { }) 2160DEF_TRAVERSE_STMT(DesignatedInitExpr, { }) 2161DEF_TRAVERSE_STMT(ExtVectorElementExpr, { }) 2162DEF_TRAVERSE_STMT(GNUNullExpr, { }) 2163DEF_TRAVERSE_STMT(ImplicitValueInitExpr, { }) 2164DEF_TRAVERSE_STMT(ObjCBoolLiteralExpr, { }) 2165DEF_TRAVERSE_STMT(ObjCEncodeExpr, { 2166 if (TypeSourceInfo *TInfo = S->getEncodedTypeSourceInfo()) 2167 TRY_TO(TraverseTypeLoc(TInfo->getTypeLoc())); 2168}) 2169DEF_TRAVERSE_STMT(ObjCIsaExpr, { }) 2170DEF_TRAVERSE_STMT(ObjCIvarRefExpr, { }) 2171DEF_TRAVERSE_STMT(ObjCMessageExpr, { }) 2172DEF_TRAVERSE_STMT(ObjCPropertyRefExpr, { }) 2173DEF_TRAVERSE_STMT(ObjCSubscriptRefExpr, { }) 2174DEF_TRAVERSE_STMT(ObjCProtocolExpr, { }) 2175DEF_TRAVERSE_STMT(ObjCSelectorExpr, { }) 2176DEF_TRAVERSE_STMT(ObjCIndirectCopyRestoreExpr, { }) 2177DEF_TRAVERSE_STMT(ObjCBridgedCastExpr, { 2178 TRY_TO(TraverseTypeLoc(S->getTypeInfoAsWritten()->getTypeLoc())); 2179}) 2180DEF_TRAVERSE_STMT(ParenExpr, { }) 2181DEF_TRAVERSE_STMT(ParenListExpr, { }) 2182DEF_TRAVERSE_STMT(PredefinedExpr, { }) 2183DEF_TRAVERSE_STMT(ShuffleVectorExpr, { }) 2184DEF_TRAVERSE_STMT(StmtExpr, { }) 2185DEF_TRAVERSE_STMT(UnresolvedLookupExpr, { 2186 TRY_TO(TraverseNestedNameSpecifierLoc(S->getQualifierLoc())); 2187 if (S->hasExplicitTemplateArgs()) { 2188 TRY_TO(TraverseTemplateArgumentLocsHelper(S->getTemplateArgs(), 2189 S->getNumTemplateArgs())); 2190 } 2191}) 2192 2193DEF_TRAVERSE_STMT(UnresolvedMemberExpr, { 2194 TRY_TO(TraverseNestedNameSpecifierLoc(S->getQualifierLoc())); 2195 if (S->hasExplicitTemplateArgs()) { 2196 TRY_TO(TraverseTemplateArgumentLocsHelper(S->getTemplateArgs(), 2197 S->getNumTemplateArgs())); 2198 } 2199}) 2200 2201DEF_TRAVERSE_STMT(SEHTryStmt, {}) 2202DEF_TRAVERSE_STMT(SEHExceptStmt, {}) 2203DEF_TRAVERSE_STMT(SEHFinallyStmt,{}) 2204 2205DEF_TRAVERSE_STMT(CXXOperatorCallExpr, { }) 2206DEF_TRAVERSE_STMT(OpaqueValueExpr, { }) 2207DEF_TRAVERSE_STMT(CUDAKernelCallExpr, { }) 2208 2209// These operators (all of them) do not need any action except 2210// iterating over the children. 2211DEF_TRAVERSE_STMT(BinaryConditionalOperator, { }) 2212DEF_TRAVERSE_STMT(ConditionalOperator, { }) 2213DEF_TRAVERSE_STMT(UnaryOperator, { }) 2214DEF_TRAVERSE_STMT(BinaryOperator, { }) 2215DEF_TRAVERSE_STMT(CompoundAssignOperator, { }) 2216DEF_TRAVERSE_STMT(CXXNoexceptExpr, { }) 2217DEF_TRAVERSE_STMT(PackExpansionExpr, { }) 2218DEF_TRAVERSE_STMT(SizeOfPackExpr, { }) 2219DEF_TRAVERSE_STMT(SubstNonTypeTemplateParmPackExpr, { }) 2220DEF_TRAVERSE_STMT(SubstNonTypeTemplateParmExpr, { }) 2221DEF_TRAVERSE_STMT(FunctionParmPackExpr, { }) 2222DEF_TRAVERSE_STMT(MaterializeTemporaryExpr, { }) 2223DEF_TRAVERSE_STMT(AtomicExpr, { }) 2224 2225// These literals (all of them) do not need any action. 2226DEF_TRAVERSE_STMT(IntegerLiteral, { }) 2227DEF_TRAVERSE_STMT(CharacterLiteral, { }) 2228DEF_TRAVERSE_STMT(FloatingLiteral, { }) 2229DEF_TRAVERSE_STMT(ImaginaryLiteral, { }) 2230DEF_TRAVERSE_STMT(StringLiteral, { }) 2231DEF_TRAVERSE_STMT(ObjCStringLiteral, { }) 2232DEF_TRAVERSE_STMT(ObjCBoxedExpr, { }) 2233DEF_TRAVERSE_STMT(ObjCArrayLiteral, { }) 2234DEF_TRAVERSE_STMT(ObjCDictionaryLiteral, { }) 2235 2236// Traverse OpenCL: AsType, Convert. 2237DEF_TRAVERSE_STMT(AsTypeExpr, { }) 2238 2239// FIXME: look at the following tricky-seeming exprs to see if we 2240// need to recurse on anything. These are ones that have methods 2241// returning decls or qualtypes or nestednamespecifier -- though I'm 2242// not sure if they own them -- or just seemed very complicated, or 2243// had lots of sub-types to explore. 2244// 2245// VisitOverloadExpr and its children: recurse on template args? etc? 2246 2247// FIXME: go through all the stmts and exprs again, and see which of them 2248// create new types, and recurse on the types (TypeLocs?) of those. 2249// Candidates: 2250// 2251// http://clang.llvm.org/doxygen/classclang_1_1CXXTypeidExpr.html 2252// http://clang.llvm.org/doxygen/classclang_1_1UnaryExprOrTypeTraitExpr.html 2253// http://clang.llvm.org/doxygen/classclang_1_1TypesCompatibleExpr.html 2254// Every class that has getQualifier. 2255 2256#undef DEF_TRAVERSE_STMT 2257 2258#undef TRY_TO 2259 2260} // end namespace clang 2261 2262#endif // LLVM_CLANG_AST_RECURSIVEASTVISITOR_H 2263