1//===--- ASTMatchers.h - Structural query framework -------------*- 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 implements matchers to be used together with the MatchFinder to 11// match AST nodes. 12// 13// Matchers are created by generator functions, which can be combined in 14// a functional in-language DSL to express queries over the C++ AST. 15// 16// For example, to match a class with a certain name, one would call: 17// recordDecl(hasName("MyClass")) 18// which returns a matcher that can be used to find all AST nodes that declare 19// a class named 'MyClass'. 20// 21// For more complicated match expressions we're often interested in accessing 22// multiple parts of the matched AST nodes once a match is found. In that case, 23// use the id(...) matcher around the match expressions that match the nodes 24// you want to access. 25// 26// For example, when we're interested in child classes of a certain class, we 27// would write: 28// recordDecl(hasName("MyClass"), hasChild(id("child", recordDecl()))) 29// When the match is found via the MatchFinder, a user provided callback will 30// be called with a BoundNodes instance that contains a mapping from the 31// strings that we provided for the id(...) calls to the nodes that were 32// matched. 33// In the given example, each time our matcher finds a match we get a callback 34// where "child" is bound to the CXXRecordDecl node of the matching child 35// class declaration. 36// 37// See ASTMatchersInternal.h for a more in-depth explanation of the 38// implementation details of the matcher framework. 39// 40// See ASTMatchFinder.h for how to use the generated matchers to run over 41// an AST. 42// 43//===----------------------------------------------------------------------===// 44 45#ifndef LLVM_CLANG_AST_MATCHERS_AST_MATCHERS_H 46#define LLVM_CLANG_AST_MATCHERS_AST_MATCHERS_H 47 48#include "clang/AST/DeclFriend.h" 49#include "clang/AST/DeclTemplate.h" 50#include "clang/ASTMatchers/ASTMatchersInternal.h" 51#include "clang/ASTMatchers/ASTMatchersMacros.h" 52#include "llvm/ADT/Twine.h" 53#include "llvm/Support/Regex.h" 54#include <iterator> 55 56namespace clang { 57namespace ast_matchers { 58 59/// \brief Maps string IDs to AST nodes matched by parts of a matcher. 60/// 61/// The bound nodes are generated by calling \c bind("id") on the node matchers 62/// of the nodes we want to access later. 63/// 64/// The instances of BoundNodes are created by \c MatchFinder when the user's 65/// callbacks are executed every time a match is found. 66class BoundNodes { 67public: 68 /// \brief Returns the AST node bound to \c ID. 69 /// 70 /// Returns NULL if there was no node bound to \c ID or if there is a node but 71 /// it cannot be converted to the specified type. 72 template <typename T> 73 const T *getNodeAs(StringRef ID) const { 74 return MyBoundNodes.getNodeAs<T>(ID); 75 } 76 77 /// \brief Deprecated. Please use \c getNodeAs instead. 78 /// @{ 79 template <typename T> 80 const T *getDeclAs(StringRef ID) const { 81 return getNodeAs<T>(ID); 82 } 83 template <typename T> 84 const T *getStmtAs(StringRef ID) const { 85 return getNodeAs<T>(ID); 86 } 87 /// @} 88 89private: 90 /// \brief Create BoundNodes from a pre-filled map of bindings. 91 BoundNodes(internal::BoundNodesMap &MyBoundNodes) 92 : MyBoundNodes(MyBoundNodes) {} 93 94 internal::BoundNodesMap MyBoundNodes; 95 96 friend class internal::BoundNodesTreeBuilder; 97}; 98 99/// \brief If the provided matcher matches a node, binds the node to \c ID. 100/// 101/// FIXME: Do we want to support this now that we have bind()? 102template <typename T> 103internal::Matcher<T> id(const std::string &ID, 104 const internal::BindableMatcher<T> &InnerMatcher) { 105 return InnerMatcher.bind(ID); 106} 107 108/// \brief Types of matchers for the top-level classes in the AST class 109/// hierarchy. 110/// @{ 111typedef internal::Matcher<Decl> DeclarationMatcher; 112typedef internal::Matcher<Stmt> StatementMatcher; 113typedef internal::Matcher<QualType> TypeMatcher; 114typedef internal::Matcher<TypeLoc> TypeLocMatcher; 115typedef internal::Matcher<NestedNameSpecifier> NestedNameSpecifierMatcher; 116typedef internal::Matcher<NestedNameSpecifierLoc> NestedNameSpecifierLocMatcher; 117/// @} 118 119/// \brief Matches any node. 120/// 121/// Useful when another matcher requires a child matcher, but there's no 122/// additional constraint. This will often be used with an explicit conversion 123/// to an \c internal::Matcher<> type such as \c TypeMatcher. 124/// 125/// Example: \c DeclarationMatcher(anything()) matches all declarations, e.g., 126/// \code 127/// "int* p" and "void f()" in 128/// int* p; 129/// void f(); 130/// \endcode 131/// 132/// Usable as: Any Matcher 133inline internal::PolymorphicMatcherWithParam0<internal::TrueMatcher> 134anything() { 135 return internal::PolymorphicMatcherWithParam0<internal::TrueMatcher>(); 136} 137 138/// \brief Matches declarations. 139/// 140/// Examples matches \c X, \c C, and the friend declaration inside \c C; 141/// \code 142/// void X(); 143/// class C { 144/// friend X; 145/// }; 146/// \endcode 147const internal::VariadicAllOfMatcher<Decl> decl; 148 149/// \brief Matches a declaration of anything that could have a name. 150/// 151/// Example matches \c X, \c S, the anonymous union type, \c i, and \c U; 152/// \code 153/// typedef int X; 154/// struct S { 155/// union { 156/// int i; 157/// } U; 158/// }; 159/// \endcode 160const internal::VariadicDynCastAllOfMatcher<Decl, NamedDecl> namedDecl; 161 162/// \brief Matches a declaration of a namespace. 163/// 164/// Given 165/// \code 166/// namespace {} 167/// namespace test {} 168/// \endcode 169/// namespaceDecl() 170/// matches "namespace {}" and "namespace test {}" 171const internal::VariadicDynCastAllOfMatcher<Decl, NamespaceDecl> namespaceDecl; 172 173/// \brief Matches C++ class declarations. 174/// 175/// Example matches \c X, \c Z 176/// \code 177/// class X; 178/// template<class T> class Z {}; 179/// \endcode 180const internal::VariadicDynCastAllOfMatcher< 181 Decl, 182 CXXRecordDecl> recordDecl; 183 184/// \brief Matches C++ class template declarations. 185/// 186/// Example matches \c Z 187/// \code 188/// template<class T> class Z {}; 189/// \endcode 190const internal::VariadicDynCastAllOfMatcher< 191 Decl, 192 ClassTemplateDecl> classTemplateDecl; 193 194/// \brief Matches C++ class template specializations. 195/// 196/// Given 197/// \code 198/// template<typename T> class A {}; 199/// template<> class A<double> {}; 200/// A<int> a; 201/// \endcode 202/// classTemplateSpecializationDecl() 203/// matches the specializations \c A<int> and \c A<double> 204const internal::VariadicDynCastAllOfMatcher< 205 Decl, 206 ClassTemplateSpecializationDecl> classTemplateSpecializationDecl; 207 208/// \brief Matches declarator declarations (field, variable, function 209/// and non-type template parameter declarations). 210/// 211/// Given 212/// \code 213/// class X { int y; }; 214/// \endcode 215/// declaratorDecl() 216/// matches \c int y. 217const internal::VariadicDynCastAllOfMatcher<Decl, DeclaratorDecl> 218 declaratorDecl; 219 220/// \brief Matches parameter variable declarations. 221/// 222/// Given 223/// \code 224/// void f(int x); 225/// \endcode 226/// parmVarDecl() 227/// matches \c int x. 228const internal::VariadicDynCastAllOfMatcher<Decl, ParmVarDecl> parmVarDecl; 229 230/// \brief Matches C++ access specifier declarations. 231/// 232/// Given 233/// \code 234/// class C { 235/// public: 236/// int a; 237/// }; 238/// \endcode 239/// accessSpecDecl() 240/// matches 'public:' 241const internal::VariadicDynCastAllOfMatcher< 242 Decl, 243 AccessSpecDecl> accessSpecDecl; 244 245/// \brief Matches constructor initializers. 246/// 247/// Examples matches \c i(42). 248/// \code 249/// class C { 250/// C() : i(42) {} 251/// int i; 252/// }; 253/// \endcode 254const internal::VariadicAllOfMatcher<CXXCtorInitializer> ctorInitializer; 255 256/// \brief Matches public C++ declarations. 257/// 258/// Given 259/// \code 260/// class C { 261/// public: int a; 262/// protected: int b; 263/// private: int c; 264/// }; 265/// \endcode 266/// fieldDecl(isPublic()) 267/// matches 'int a;' 268AST_MATCHER(Decl, isPublic) { 269 return Node.getAccess() == AS_public; 270} 271 272/// \brief Matches protected C++ declarations. 273/// 274/// Given 275/// \code 276/// class C { 277/// public: int a; 278/// protected: int b; 279/// private: int c; 280/// }; 281/// \endcode 282/// fieldDecl(isProtected()) 283/// matches 'int b;' 284AST_MATCHER(Decl, isProtected) { 285 return Node.getAccess() == AS_protected; 286} 287 288/// \brief Matches private C++ declarations. 289/// 290/// Given 291/// \code 292/// class C { 293/// public: int a; 294/// protected: int b; 295/// private: int c; 296/// }; 297/// \endcode 298/// fieldDecl(isPrivate()) 299/// matches 'int c;' 300AST_MATCHER(Decl, isPrivate) { 301 return Node.getAccess() == AS_private; 302} 303 304/// \brief Matches classTemplateSpecializations that have at least one 305/// TemplateArgument matching the given InnerMatcher. 306/// 307/// Given 308/// \code 309/// template<typename T> class A {}; 310/// template<> class A<double> {}; 311/// A<int> a; 312/// \endcode 313/// classTemplateSpecializationDecl(hasAnyTemplateArgument( 314/// refersToType(asString("int")))) 315/// matches the specialization \c A<int> 316AST_MATCHER_P(ClassTemplateSpecializationDecl, hasAnyTemplateArgument, 317 internal::Matcher<TemplateArgument>, InnerMatcher) { 318 llvm::ArrayRef<TemplateArgument> List = Node.getTemplateArgs().asArray(); 319 return matchesFirstInRange(InnerMatcher, List.begin(), List.end(), Finder, 320 Builder); 321} 322 323/// \brief Matches expressions that match InnerMatcher after any implicit casts 324/// are stripped off. 325/// 326/// Parentheses and explicit casts are not discarded. 327/// Given 328/// \code 329/// int arr[5]; 330/// int a = 0; 331/// char b = 0; 332/// const int c = a; 333/// int *d = arr; 334/// long e = (long) 0l; 335/// \endcode 336/// The matchers 337/// \code 338/// varDecl(hasInitializer(ignoringImpCasts(integerLiteral()))) 339/// varDecl(hasInitializer(ignoringImpCasts(declRefExpr()))) 340/// \endcode 341/// would match the declarations for a, b, c, and d, but not e. 342/// While 343/// \code 344/// varDecl(hasInitializer(integerLiteral())) 345/// varDecl(hasInitializer(declRefExpr())) 346/// \endcode 347/// only match the declarations for b, c, and d. 348AST_MATCHER_P(Expr, ignoringImpCasts, 349 internal::Matcher<Expr>, InnerMatcher) { 350 return InnerMatcher.matches(*Node.IgnoreImpCasts(), Finder, Builder); 351} 352 353/// \brief Matches expressions that match InnerMatcher after parentheses and 354/// casts are stripped off. 355/// 356/// Implicit and non-C Style casts are also discarded. 357/// Given 358/// \code 359/// int a = 0; 360/// char b = (0); 361/// void* c = reinterpret_cast<char*>(0); 362/// char d = char(0); 363/// \endcode 364/// The matcher 365/// varDecl(hasInitializer(ignoringParenCasts(integerLiteral()))) 366/// would match the declarations for a, b, c, and d. 367/// while 368/// varDecl(hasInitializer(integerLiteral())) 369/// only match the declaration for a. 370AST_MATCHER_P(Expr, ignoringParenCasts, internal::Matcher<Expr>, InnerMatcher) { 371 return InnerMatcher.matches(*Node.IgnoreParenCasts(), Finder, Builder); 372} 373 374/// \brief Matches expressions that match InnerMatcher after implicit casts and 375/// parentheses are stripped off. 376/// 377/// Explicit casts are not discarded. 378/// Given 379/// \code 380/// int arr[5]; 381/// int a = 0; 382/// char b = (0); 383/// const int c = a; 384/// int *d = (arr); 385/// long e = ((long) 0l); 386/// \endcode 387/// The matchers 388/// varDecl(hasInitializer(ignoringParenImpCasts(integerLiteral()))) 389/// varDecl(hasInitializer(ignoringParenImpCasts(declRefExpr()))) 390/// would match the declarations for a, b, c, and d, but not e. 391/// while 392/// varDecl(hasInitializer(integerLiteral())) 393/// varDecl(hasInitializer(declRefExpr())) 394/// would only match the declaration for a. 395AST_MATCHER_P(Expr, ignoringParenImpCasts, 396 internal::Matcher<Expr>, InnerMatcher) { 397 return InnerMatcher.matches(*Node.IgnoreParenImpCasts(), Finder, Builder); 398} 399 400/// \brief Matches classTemplateSpecializations where the n'th TemplateArgument 401/// matches the given InnerMatcher. 402/// 403/// Given 404/// \code 405/// template<typename T, typename U> class A {}; 406/// A<bool, int> b; 407/// A<int, bool> c; 408/// \endcode 409/// classTemplateSpecializationDecl(hasTemplateArgument( 410/// 1, refersToType(asString("int")))) 411/// matches the specialization \c A<bool, int> 412AST_MATCHER_P2(ClassTemplateSpecializationDecl, hasTemplateArgument, 413 unsigned, N, internal::Matcher<TemplateArgument>, InnerMatcher) { 414 const TemplateArgumentList &List = Node.getTemplateArgs(); 415 if (List.size() <= N) 416 return false; 417 return InnerMatcher.matches(List.get(N), Finder, Builder); 418} 419 420/// \brief Matches a TemplateArgument that refers to a certain type. 421/// 422/// Given 423/// \code 424/// struct X {}; 425/// template<typename T> struct A {}; 426/// A<X> a; 427/// \endcode 428/// classTemplateSpecializationDecl(hasAnyTemplateArgument( 429/// refersToType(class(hasName("X"))))) 430/// matches the specialization \c A<X> 431AST_MATCHER_P(TemplateArgument, refersToType, 432 internal::Matcher<QualType>, InnerMatcher) { 433 if (Node.getKind() != TemplateArgument::Type) 434 return false; 435 return InnerMatcher.matches(Node.getAsType(), Finder, Builder); 436} 437 438/// \brief Matches a TemplateArgument that refers to a certain declaration. 439/// 440/// Given 441/// \code 442/// template<typename T> struct A {}; 443/// struct B { B* next; }; 444/// A<&B::next> a; 445/// \endcode 446/// classTemplateSpecializationDecl(hasAnyTemplateArgument( 447/// refersToDeclaration(fieldDecl(hasName("next")))) 448/// matches the specialization \c A<&B::next> with \c fieldDecl(...) matching 449/// \c B::next 450AST_MATCHER_P(TemplateArgument, refersToDeclaration, 451 internal::Matcher<Decl>, InnerMatcher) { 452 if (Node.getKind() == TemplateArgument::Declaration) 453 return InnerMatcher.matches(*Node.getAsDecl(), Finder, Builder); 454 return false; 455} 456 457/// \brief Matches C++ constructor declarations. 458/// 459/// Example matches Foo::Foo() and Foo::Foo(int) 460/// \code 461/// class Foo { 462/// public: 463/// Foo(); 464/// Foo(int); 465/// int DoSomething(); 466/// }; 467/// \endcode 468const internal::VariadicDynCastAllOfMatcher< 469 Decl, 470 CXXConstructorDecl> constructorDecl; 471 472/// \brief Matches explicit C++ destructor declarations. 473/// 474/// Example matches Foo::~Foo() 475/// \code 476/// class Foo { 477/// public: 478/// virtual ~Foo(); 479/// }; 480/// \endcode 481const internal::VariadicDynCastAllOfMatcher< 482 Decl, 483 CXXDestructorDecl> destructorDecl; 484 485/// \brief Matches enum declarations. 486/// 487/// Example matches X 488/// \code 489/// enum X { 490/// A, B, C 491/// }; 492/// \endcode 493const internal::VariadicDynCastAllOfMatcher<Decl, EnumDecl> enumDecl; 494 495/// \brief Matches enum constants. 496/// 497/// Example matches A, B, C 498/// \code 499/// enum X { 500/// A, B, C 501/// }; 502/// \endcode 503const internal::VariadicDynCastAllOfMatcher< 504 Decl, 505 EnumConstantDecl> enumConstantDecl; 506 507/// \brief Matches method declarations. 508/// 509/// Example matches y 510/// \code 511/// class X { void y() }; 512/// \endcode 513const internal::VariadicDynCastAllOfMatcher<Decl, CXXMethodDecl> methodDecl; 514 515/// \brief Matches variable declarations. 516/// 517/// Note: this does not match declarations of member variables, which are 518/// "field" declarations in Clang parlance. 519/// 520/// Example matches a 521/// \code 522/// int a; 523/// \endcode 524const internal::VariadicDynCastAllOfMatcher<Decl, VarDecl> varDecl; 525 526/// \brief Matches field declarations. 527/// 528/// Given 529/// \code 530/// class X { int m; }; 531/// \endcode 532/// fieldDecl() 533/// matches 'm'. 534const internal::VariadicDynCastAllOfMatcher<Decl, FieldDecl> fieldDecl; 535 536/// \brief Matches function declarations. 537/// 538/// Example matches f 539/// \code 540/// void f(); 541/// \endcode 542const internal::VariadicDynCastAllOfMatcher<Decl, FunctionDecl> functionDecl; 543 544/// \brief Matches C++ function template declarations. 545/// 546/// Example matches f 547/// \code 548/// template<class T> void f(T t) {} 549/// \endcode 550const internal::VariadicDynCastAllOfMatcher< 551 Decl, 552 FunctionTemplateDecl> functionTemplateDecl; 553 554/// \brief Matches friend declarations. 555/// 556/// Given 557/// \code 558/// class X { friend void foo(); }; 559/// \endcode 560/// friendDecl() 561/// matches 'friend void foo()'. 562const internal::VariadicDynCastAllOfMatcher<Decl, FriendDecl> friendDecl; 563 564/// \brief Matches statements. 565/// 566/// Given 567/// \code 568/// { ++a; } 569/// \endcode 570/// stmt() 571/// matches both the compound statement '{ ++a; }' and '++a'. 572const internal::VariadicAllOfMatcher<Stmt> stmt; 573 574/// \brief Matches declaration statements. 575/// 576/// Given 577/// \code 578/// int a; 579/// \endcode 580/// declStmt() 581/// matches 'int a'. 582const internal::VariadicDynCastAllOfMatcher< 583 Stmt, 584 DeclStmt> declStmt; 585 586/// \brief Matches member expressions. 587/// 588/// Given 589/// \code 590/// class Y { 591/// void x() { this->x(); x(); Y y; y.x(); a; this->b; Y::b; } 592/// int a; static int b; 593/// }; 594/// \endcode 595/// memberExpr() 596/// matches this->x, x, y.x, a, this->b 597const internal::VariadicDynCastAllOfMatcher<Stmt, MemberExpr> memberExpr; 598 599/// \brief Matches call expressions. 600/// 601/// Example matches x.y() and y() 602/// \code 603/// X x; 604/// x.y(); 605/// y(); 606/// \endcode 607const internal::VariadicDynCastAllOfMatcher<Stmt, CallExpr> callExpr; 608 609/// \brief Matches lambda expressions. 610/// 611/// Example matches [&](){return 5;} 612/// \code 613/// [&](){return 5;} 614/// \endcode 615const internal::VariadicDynCastAllOfMatcher<Stmt, LambdaExpr> lambdaExpr; 616 617/// \brief Matches member call expressions. 618/// 619/// Example matches x.y() 620/// \code 621/// X x; 622/// x.y(); 623/// \endcode 624const internal::VariadicDynCastAllOfMatcher< 625 Stmt, 626 CXXMemberCallExpr> memberCallExpr; 627 628/// \brief Matches init list expressions. 629/// 630/// Given 631/// \code 632/// int a[] = { 1, 2 }; 633/// struct B { int x, y; }; 634/// B b = { 5, 6 }; 635/// \endcode 636/// initList() 637/// matches "{ 1, 2 }" and "{ 5, 6 }" 638const internal::VariadicDynCastAllOfMatcher<Stmt, InitListExpr> initListExpr; 639 640/// \brief Matches using declarations. 641/// 642/// Given 643/// \code 644/// namespace X { int x; } 645/// using X::x; 646/// \endcode 647/// usingDecl() 648/// matches \code using X::x \endcode 649const internal::VariadicDynCastAllOfMatcher<Decl, UsingDecl> usingDecl; 650 651/// \brief Matches unresolved using value declarations. 652/// 653/// Given 654/// \code 655/// template<typename X> 656/// class C : private X { 657/// using X::x; 658/// }; 659/// \endcode 660/// unresolvedUsingValueDecl() 661/// matches \code using X::x \endcode 662const internal::VariadicDynCastAllOfMatcher< 663 Decl, 664 UnresolvedUsingValueDecl> unresolvedUsingValueDecl; 665 666/// \brief Matches constructor call expressions (including implicit ones). 667/// 668/// Example matches string(ptr, n) and ptr within arguments of f 669/// (matcher = constructExpr()) 670/// \code 671/// void f(const string &a, const string &b); 672/// char *ptr; 673/// int n; 674/// f(string(ptr, n), ptr); 675/// \endcode 676const internal::VariadicDynCastAllOfMatcher< 677 Stmt, 678 CXXConstructExpr> constructExpr; 679 680/// \brief Matches unresolved constructor call expressions. 681/// 682/// Example matches T(t) in return statement of f 683/// (matcher = unresolvedConstructExpr()) 684/// \code 685/// template <typename T> 686/// void f(const T& t) { return T(t); } 687/// \endcode 688const internal::VariadicDynCastAllOfMatcher< 689 Stmt, 690 CXXUnresolvedConstructExpr> unresolvedConstructExpr; 691 692/// \brief Matches implicit and explicit this expressions. 693/// 694/// Example matches the implicit this expression in "return i". 695/// (matcher = thisExpr()) 696/// \code 697/// struct foo { 698/// int i; 699/// int f() { return i; } 700/// }; 701/// \endcode 702const internal::VariadicDynCastAllOfMatcher<Stmt, CXXThisExpr> thisExpr; 703 704/// \brief Matches nodes where temporaries are created. 705/// 706/// Example matches FunctionTakesString(GetStringByValue()) 707/// (matcher = bindTemporaryExpr()) 708/// \code 709/// FunctionTakesString(GetStringByValue()); 710/// FunctionTakesStringByPointer(GetStringPointer()); 711/// \endcode 712const internal::VariadicDynCastAllOfMatcher< 713 Stmt, 714 CXXBindTemporaryExpr> bindTemporaryExpr; 715 716/// \brief Matches nodes where temporaries are materialized. 717/// 718/// Example: Given 719/// \code 720/// struct T {void func()}; 721/// T f(); 722/// void g(T); 723/// \endcode 724/// materializeTemporaryExpr() matches 'f()' in these statements 725/// \code 726/// T u(f()); 727/// g(f()); 728/// \endcode 729/// but does not match 730/// \code 731/// f(); 732/// f().func(); 733/// \endcode 734const internal::VariadicDynCastAllOfMatcher< 735 Stmt, 736 MaterializeTemporaryExpr> materializeTemporaryExpr; 737 738/// \brief Matches new expressions. 739/// 740/// Given 741/// \code 742/// new X; 743/// \endcode 744/// newExpr() 745/// matches 'new X'. 746const internal::VariadicDynCastAllOfMatcher<Stmt, CXXNewExpr> newExpr; 747 748/// \brief Matches delete expressions. 749/// 750/// Given 751/// \code 752/// delete X; 753/// \endcode 754/// deleteExpr() 755/// matches 'delete X'. 756const internal::VariadicDynCastAllOfMatcher<Stmt, CXXDeleteExpr> deleteExpr; 757 758/// \brief Matches array subscript expressions. 759/// 760/// Given 761/// \code 762/// int i = a[1]; 763/// \endcode 764/// arraySubscriptExpr() 765/// matches "a[1]" 766const internal::VariadicDynCastAllOfMatcher< 767 Stmt, 768 ArraySubscriptExpr> arraySubscriptExpr; 769 770/// \brief Matches the value of a default argument at the call site. 771/// 772/// Example matches the CXXDefaultArgExpr placeholder inserted for the 773/// default value of the second parameter in the call expression f(42) 774/// (matcher = defaultArgExpr()) 775/// \code 776/// void f(int x, int y = 0); 777/// f(42); 778/// \endcode 779const internal::VariadicDynCastAllOfMatcher< 780 Stmt, 781 CXXDefaultArgExpr> defaultArgExpr; 782 783/// \brief Matches overloaded operator calls. 784/// 785/// Note that if an operator isn't overloaded, it won't match. Instead, use 786/// binaryOperator matcher. 787/// Currently it does not match operators such as new delete. 788/// FIXME: figure out why these do not match? 789/// 790/// Example matches both operator<<((o << b), c) and operator<<(o, b) 791/// (matcher = operatorCallExpr()) 792/// \code 793/// ostream &operator<< (ostream &out, int i) { }; 794/// ostream &o; int b = 1, c = 1; 795/// o << b << c; 796/// \endcode 797const internal::VariadicDynCastAllOfMatcher< 798 Stmt, 799 CXXOperatorCallExpr> operatorCallExpr; 800 801/// \brief Matches expressions. 802/// 803/// Example matches x() 804/// \code 805/// void f() { x(); } 806/// \endcode 807const internal::VariadicDynCastAllOfMatcher<Stmt, Expr> expr; 808 809/// \brief Matches expressions that refer to declarations. 810/// 811/// Example matches x in if (x) 812/// \code 813/// bool x; 814/// if (x) {} 815/// \endcode 816const internal::VariadicDynCastAllOfMatcher<Stmt, DeclRefExpr> declRefExpr; 817 818/// \brief Matches if statements. 819/// 820/// Example matches 'if (x) {}' 821/// \code 822/// if (x) {} 823/// \endcode 824const internal::VariadicDynCastAllOfMatcher<Stmt, IfStmt> ifStmt; 825 826/// \brief Matches for statements. 827/// 828/// Example matches 'for (;;) {}' 829/// \code 830/// for (;;) {} 831/// int i[] = {1, 2, 3}; for (auto a : i); 832/// \endcode 833const internal::VariadicDynCastAllOfMatcher<Stmt, ForStmt> forStmt; 834 835/// \brief Matches range-based for statements. 836/// 837/// forRangeStmt() matches 'for (auto a : i)' 838/// \code 839/// int i[] = {1, 2, 3}; for (auto a : i); 840/// for(int j = 0; j < 5; ++j); 841/// \endcode 842const internal::VariadicDynCastAllOfMatcher<Stmt, CXXForRangeStmt> forRangeStmt; 843 844/// \brief Matches the increment statement of a for loop. 845/// 846/// Example: 847/// forStmt(hasIncrement(unaryOperator(hasOperatorName("++")))) 848/// matches '++x' in 849/// \code 850/// for (x; x < N; ++x) { } 851/// \endcode 852AST_MATCHER_P(ForStmt, hasIncrement, internal::Matcher<Stmt>, 853 InnerMatcher) { 854 const Stmt *const Increment = Node.getInc(); 855 return (Increment != NULL && 856 InnerMatcher.matches(*Increment, Finder, Builder)); 857} 858 859/// \brief Matches the initialization statement of a for loop. 860/// 861/// Example: 862/// forStmt(hasLoopInit(declStmt())) 863/// matches 'int x = 0' in 864/// \code 865/// for (int x = 0; x < N; ++x) { } 866/// \endcode 867AST_MATCHER_P(ForStmt, hasLoopInit, internal::Matcher<Stmt>, 868 InnerMatcher) { 869 const Stmt *const Init = Node.getInit(); 870 return (Init != NULL && InnerMatcher.matches(*Init, Finder, Builder)); 871} 872 873/// \brief Matches while statements. 874/// 875/// Given 876/// \code 877/// while (true) {} 878/// \endcode 879/// whileStmt() 880/// matches 'while (true) {}'. 881const internal::VariadicDynCastAllOfMatcher<Stmt, WhileStmt> whileStmt; 882 883/// \brief Matches do statements. 884/// 885/// Given 886/// \code 887/// do {} while (true); 888/// \endcode 889/// doStmt() 890/// matches 'do {} while(true)' 891const internal::VariadicDynCastAllOfMatcher<Stmt, DoStmt> doStmt; 892 893/// \brief Matches break statements. 894/// 895/// Given 896/// \code 897/// while (true) { break; } 898/// \endcode 899/// breakStmt() 900/// matches 'break' 901const internal::VariadicDynCastAllOfMatcher<Stmt, BreakStmt> breakStmt; 902 903/// \brief Matches continue statements. 904/// 905/// Given 906/// \code 907/// while (true) { continue; } 908/// \endcode 909/// continueStmt() 910/// matches 'continue' 911const internal::VariadicDynCastAllOfMatcher<Stmt, ContinueStmt> continueStmt; 912 913/// \brief Matches return statements. 914/// 915/// Given 916/// \code 917/// return 1; 918/// \endcode 919/// returnStmt() 920/// matches 'return 1' 921const internal::VariadicDynCastAllOfMatcher<Stmt, ReturnStmt> returnStmt; 922 923/// \brief Matches goto statements. 924/// 925/// Given 926/// \code 927/// goto FOO; 928/// FOO: bar(); 929/// \endcode 930/// gotoStmt() 931/// matches 'goto FOO' 932const internal::VariadicDynCastAllOfMatcher<Stmt, GotoStmt> gotoStmt; 933 934/// \brief Matches label statements. 935/// 936/// Given 937/// \code 938/// goto FOO; 939/// FOO: bar(); 940/// \endcode 941/// labelStmt() 942/// matches 'FOO:' 943const internal::VariadicDynCastAllOfMatcher<Stmt, LabelStmt> labelStmt; 944 945/// \brief Matches switch statements. 946/// 947/// Given 948/// \code 949/// switch(a) { case 42: break; default: break; } 950/// \endcode 951/// switchStmt() 952/// matches 'switch(a)'. 953const internal::VariadicDynCastAllOfMatcher<Stmt, SwitchStmt> switchStmt; 954 955/// \brief Matches case and default statements inside switch statements. 956/// 957/// Given 958/// \code 959/// switch(a) { case 42: break; default: break; } 960/// \endcode 961/// switchCase() 962/// matches 'case 42: break;' and 'default: break;'. 963const internal::VariadicDynCastAllOfMatcher<Stmt, SwitchCase> switchCase; 964 965/// \brief Matches case statements inside switch statements. 966/// 967/// Given 968/// \code 969/// switch(a) { case 42: break; default: break; } 970/// \endcode 971/// caseStmt() 972/// matches 'case 42: break;'. 973const internal::VariadicDynCastAllOfMatcher<Stmt, CaseStmt> caseStmt; 974 975/// \brief Matches default statements inside switch statements. 976/// 977/// Given 978/// \code 979/// switch(a) { case 42: break; default: break; } 980/// \endcode 981/// defaultStmt() 982/// matches 'default: break;'. 983const internal::VariadicDynCastAllOfMatcher<Stmt, DefaultStmt> defaultStmt; 984 985/// \brief Matches compound statements. 986/// 987/// Example matches '{}' and '{{}}'in 'for (;;) {{}}' 988/// \code 989/// for (;;) {{}} 990/// \endcode 991const internal::VariadicDynCastAllOfMatcher<Stmt, CompoundStmt> compoundStmt; 992 993/// \brief Matches catch statements. 994/// 995/// \code 996/// try {} catch(int i) {} 997/// \endcode 998/// catchStmt() 999/// matches 'catch(int i)' 1000const internal::VariadicDynCastAllOfMatcher<Stmt, CXXCatchStmt> catchStmt; 1001 1002/// \brief Matches try statements. 1003/// 1004/// \code 1005/// try {} catch(int i) {} 1006/// \endcode 1007/// tryStmt() 1008/// matches 'try {}' 1009const internal::VariadicDynCastAllOfMatcher<Stmt, CXXTryStmt> tryStmt; 1010 1011/// \brief Matches throw expressions. 1012/// 1013/// \code 1014/// try { throw 5; } catch(int i) {} 1015/// \endcode 1016/// throwExpr() 1017/// matches 'throw 5' 1018const internal::VariadicDynCastAllOfMatcher<Stmt, CXXThrowExpr> throwExpr; 1019 1020/// \brief Matches null statements. 1021/// 1022/// \code 1023/// foo();; 1024/// \endcode 1025/// nullStmt() 1026/// matches the second ';' 1027const internal::VariadicDynCastAllOfMatcher<Stmt, NullStmt> nullStmt; 1028 1029/// \brief Matches asm statements. 1030/// 1031/// \code 1032/// int i = 100; 1033/// __asm("mov al, 2"); 1034/// \endcode 1035/// asmStmt() 1036/// matches '__asm("mov al, 2")' 1037const internal::VariadicDynCastAllOfMatcher<Stmt, AsmStmt> asmStmt; 1038 1039/// \brief Matches bool literals. 1040/// 1041/// Example matches true 1042/// \code 1043/// true 1044/// \endcode 1045const internal::VariadicDynCastAllOfMatcher< 1046 Stmt, 1047 CXXBoolLiteralExpr> boolLiteral; 1048 1049/// \brief Matches string literals (also matches wide string literals). 1050/// 1051/// Example matches "abcd", L"abcd" 1052/// \code 1053/// char *s = "abcd"; wchar_t *ws = L"abcd" 1054/// \endcode 1055const internal::VariadicDynCastAllOfMatcher< 1056 Stmt, 1057 StringLiteral> stringLiteral; 1058 1059/// \brief Matches character literals (also matches wchar_t). 1060/// 1061/// Not matching Hex-encoded chars (e.g. 0x1234, which is a IntegerLiteral), 1062/// though. 1063/// 1064/// Example matches 'a', L'a' 1065/// \code 1066/// char ch = 'a'; wchar_t chw = L'a'; 1067/// \endcode 1068const internal::VariadicDynCastAllOfMatcher< 1069 Stmt, 1070 CharacterLiteral> characterLiteral; 1071 1072/// \brief Matches integer literals of all sizes / encodings, e.g. 1073/// 1, 1L, 0x1 and 1U. 1074/// 1075/// Does not match character-encoded integers such as L'a'. 1076const internal::VariadicDynCastAllOfMatcher< 1077 Stmt, 1078 IntegerLiteral> integerLiteral; 1079 1080/// \brief Matches float literals of all sizes / encodings, e.g. 1081/// 1.0, 1.0f, 1.0L and 1e10. 1082/// 1083/// Does not match implicit conversions such as 1084/// \code 1085/// float a = 10; 1086/// \endcode 1087const internal::VariadicDynCastAllOfMatcher< 1088 Stmt, 1089 FloatingLiteral> floatLiteral; 1090 1091/// \brief Matches user defined literal operator call. 1092/// 1093/// Example match: "foo"_suffix 1094const internal::VariadicDynCastAllOfMatcher< 1095 Stmt, 1096 UserDefinedLiteral> userDefinedLiteral; 1097 1098/// \brief Matches compound (i.e. non-scalar) literals 1099/// 1100/// Example match: {1}, (1, 2) 1101/// \code 1102/// int array[4] = {1}; vector int myvec = (vector int)(1, 2); 1103/// \endcode 1104const internal::VariadicDynCastAllOfMatcher< 1105 Stmt, 1106 CompoundLiteralExpr> compoundLiteralExpr; 1107 1108/// \brief Matches nullptr literal. 1109const internal::VariadicDynCastAllOfMatcher< 1110 Stmt, 1111 CXXNullPtrLiteralExpr> nullPtrLiteralExpr; 1112 1113/// \brief Matches binary operator expressions. 1114/// 1115/// Example matches a || b 1116/// \code 1117/// !(a || b) 1118/// \endcode 1119const internal::VariadicDynCastAllOfMatcher< 1120 Stmt, 1121 BinaryOperator> binaryOperator; 1122 1123/// \brief Matches unary operator expressions. 1124/// 1125/// Example matches !a 1126/// \code 1127/// !a || b 1128/// \endcode 1129const internal::VariadicDynCastAllOfMatcher< 1130 Stmt, 1131 UnaryOperator> unaryOperator; 1132 1133/// \brief Matches conditional operator expressions. 1134/// 1135/// Example matches a ? b : c 1136/// \code 1137/// (a ? b : c) + 42 1138/// \endcode 1139const internal::VariadicDynCastAllOfMatcher< 1140 Stmt, 1141 ConditionalOperator> conditionalOperator; 1142 1143/// \brief Matches a reinterpret_cast expression. 1144/// 1145/// Either the source expression or the destination type can be matched 1146/// using has(), but hasDestinationType() is more specific and can be 1147/// more readable. 1148/// 1149/// Example matches reinterpret_cast<char*>(&p) in 1150/// \code 1151/// void* p = reinterpret_cast<char*>(&p); 1152/// \endcode 1153const internal::VariadicDynCastAllOfMatcher< 1154 Stmt, 1155 CXXReinterpretCastExpr> reinterpretCastExpr; 1156 1157/// \brief Matches a C++ static_cast expression. 1158/// 1159/// \see hasDestinationType 1160/// \see reinterpretCast 1161/// 1162/// Example: 1163/// staticCastExpr() 1164/// matches 1165/// static_cast<long>(8) 1166/// in 1167/// \code 1168/// long eight(static_cast<long>(8)); 1169/// \endcode 1170const internal::VariadicDynCastAllOfMatcher< 1171 Stmt, 1172 CXXStaticCastExpr> staticCastExpr; 1173 1174/// \brief Matches a dynamic_cast expression. 1175/// 1176/// Example: 1177/// dynamicCastExpr() 1178/// matches 1179/// dynamic_cast<D*>(&b); 1180/// in 1181/// \code 1182/// struct B { virtual ~B() {} }; struct D : B {}; 1183/// B b; 1184/// D* p = dynamic_cast<D*>(&b); 1185/// \endcode 1186const internal::VariadicDynCastAllOfMatcher< 1187 Stmt, 1188 CXXDynamicCastExpr> dynamicCastExpr; 1189 1190/// \brief Matches a const_cast expression. 1191/// 1192/// Example: Matches const_cast<int*>(&r) in 1193/// \code 1194/// int n = 42; 1195/// const int &r(n); 1196/// int* p = const_cast<int*>(&r); 1197/// \endcode 1198const internal::VariadicDynCastAllOfMatcher< 1199 Stmt, 1200 CXXConstCastExpr> constCastExpr; 1201 1202/// \brief Matches a C-style cast expression. 1203/// 1204/// Example: Matches (int*) 2.2f in 1205/// \code 1206/// int i = (int) 2.2f; 1207/// \endcode 1208const internal::VariadicDynCastAllOfMatcher< 1209 Stmt, 1210 CStyleCastExpr> cStyleCastExpr; 1211 1212/// \brief Matches explicit cast expressions. 1213/// 1214/// Matches any cast expression written in user code, whether it be a 1215/// C-style cast, a functional-style cast, or a keyword cast. 1216/// 1217/// Does not match implicit conversions. 1218/// 1219/// Note: the name "explicitCast" is chosen to match Clang's terminology, as 1220/// Clang uses the term "cast" to apply to implicit conversions as well as to 1221/// actual cast expressions. 1222/// 1223/// \see hasDestinationType. 1224/// 1225/// Example: matches all five of the casts in 1226/// \code 1227/// int((int)(reinterpret_cast<int>(static_cast<int>(const_cast<int>(42))))) 1228/// \endcode 1229/// but does not match the implicit conversion in 1230/// \code 1231/// long ell = 42; 1232/// \endcode 1233const internal::VariadicDynCastAllOfMatcher< 1234 Stmt, 1235 ExplicitCastExpr> explicitCastExpr; 1236 1237/// \brief Matches the implicit cast nodes of Clang's AST. 1238/// 1239/// This matches many different places, including function call return value 1240/// eliding, as well as any type conversions. 1241const internal::VariadicDynCastAllOfMatcher< 1242 Stmt, 1243 ImplicitCastExpr> implicitCastExpr; 1244 1245/// \brief Matches any cast nodes of Clang's AST. 1246/// 1247/// Example: castExpr() matches each of the following: 1248/// \code 1249/// (int) 3; 1250/// const_cast<Expr *>(SubExpr); 1251/// char c = 0; 1252/// \endcode 1253/// but does not match 1254/// \code 1255/// int i = (0); 1256/// int k = 0; 1257/// \endcode 1258const internal::VariadicDynCastAllOfMatcher<Stmt, CastExpr> castExpr; 1259 1260/// \brief Matches functional cast expressions 1261/// 1262/// Example: Matches Foo(bar); 1263/// \code 1264/// Foo f = bar; 1265/// Foo g = (Foo) bar; 1266/// Foo h = Foo(bar); 1267/// \endcode 1268const internal::VariadicDynCastAllOfMatcher< 1269 Stmt, 1270 CXXFunctionalCastExpr> functionalCastExpr; 1271 1272/// \brief Matches \c QualTypes in the clang AST. 1273const internal::VariadicAllOfMatcher<QualType> qualType; 1274 1275/// \brief Matches \c Types in the clang AST. 1276const internal::VariadicAllOfMatcher<Type> type; 1277 1278/// \brief Matches \c TypeLocs in the clang AST. 1279const internal::VariadicAllOfMatcher<TypeLoc> typeLoc; 1280 1281/// \brief Matches if any of the given matchers matches. 1282/// 1283/// Unlike \c anyOf, \c eachOf will generate a match result for each 1284/// matching submatcher. 1285/// 1286/// For example, in: 1287/// \code 1288/// class A { int a; int b; }; 1289/// \endcode 1290/// The matcher: 1291/// \code 1292/// recordDecl(eachOf(has(fieldDecl(hasName("a")).bind("v")), 1293/// has(fieldDecl(hasName("b")).bind("v")))) 1294/// \endcode 1295/// will generate two results binding "v", the first of which binds 1296/// the field declaration of \c a, the second the field declaration of 1297/// \c b. 1298/// 1299/// Usable as: Any Matcher 1300template <typename M1, typename M2> 1301internal::PolymorphicMatcherWithParam2<internal::EachOfMatcher, M1, M2> 1302eachOf(const M1 &P1, const M2 &P2) { 1303 return internal::PolymorphicMatcherWithParam2<internal::EachOfMatcher, M1, 1304 M2>(P1, P2); 1305} 1306 1307/// \brief Various overloads for the anyOf matcher. 1308/// @{ 1309 1310/// \brief Matches if any of the given matchers matches. 1311/// 1312/// Usable as: Any Matcher 1313template<typename M1, typename M2> 1314internal::PolymorphicMatcherWithParam2<internal::AnyOfMatcher, M1, M2> 1315anyOf(const M1 &P1, const M2 &P2) { 1316 return internal::PolymorphicMatcherWithParam2<internal::AnyOfMatcher, 1317 M1, M2 >(P1, P2); 1318} 1319template<typename M1, typename M2, typename M3> 1320internal::PolymorphicMatcherWithParam2<internal::AnyOfMatcher, M1, 1321 internal::PolymorphicMatcherWithParam2<internal::AnyOfMatcher, M2, M3> > 1322anyOf(const M1 &P1, const M2 &P2, const M3 &P3) { 1323 return anyOf(P1, anyOf(P2, P3)); 1324} 1325template<typename M1, typename M2, typename M3, typename M4> 1326internal::PolymorphicMatcherWithParam2<internal::AnyOfMatcher, M1, 1327 internal::PolymorphicMatcherWithParam2<internal::AnyOfMatcher, M2, 1328 internal::PolymorphicMatcherWithParam2<internal::AnyOfMatcher, 1329 M3, M4> > > 1330anyOf(const M1 &P1, const M2 &P2, const M3 &P3, const M4 &P4) { 1331 return anyOf(P1, anyOf(P2, anyOf(P3, P4))); 1332} 1333template<typename M1, typename M2, typename M3, typename M4, typename M5> 1334internal::PolymorphicMatcherWithParam2<internal::AnyOfMatcher, M1, 1335 internal::PolymorphicMatcherWithParam2<internal::AnyOfMatcher, M2, 1336 internal::PolymorphicMatcherWithParam2<internal::AnyOfMatcher, M3, 1337 internal::PolymorphicMatcherWithParam2<internal::AnyOfMatcher, 1338 M4, M5> > > > 1339anyOf(const M1 &P1, const M2 &P2, const M3 &P3, const M4 &P4, const M5 &P5) { 1340 return anyOf(P1, anyOf(P2, anyOf(P3, anyOf(P4, P5)))); 1341} 1342 1343/// @} 1344 1345/// \brief Various overloads for the allOf matcher. 1346/// @{ 1347 1348/// \brief Matches if all given matchers match. 1349/// 1350/// Usable as: Any Matcher 1351template <typename M1, typename M2> 1352internal::PolymorphicMatcherWithParam2<internal::AllOfMatcher, M1, M2> 1353allOf(const M1 &P1, const M2 &P2) { 1354 return internal::PolymorphicMatcherWithParam2<internal::AllOfMatcher, M1, M2>( 1355 P1, P2); 1356} 1357template <typename M1, typename M2, typename M3> 1358internal::PolymorphicMatcherWithParam2< 1359 internal::AllOfMatcher, M1, 1360 internal::PolymorphicMatcherWithParam2<internal::AllOfMatcher, M2, M3> > 1361allOf(const M1 &P1, const M2 &P2, const M3 &P3) { 1362 return allOf(P1, allOf(P2, P3)); 1363} 1364template <typename M1, typename M2, typename M3, typename M4> 1365internal::PolymorphicMatcherWithParam2< 1366 internal::AllOfMatcher, M1, 1367 internal::PolymorphicMatcherWithParam2< 1368 internal::AllOfMatcher, M2, internal::PolymorphicMatcherWithParam2< 1369 internal::AllOfMatcher, M3, M4> > > 1370allOf(const M1 &P1, const M2 &P2, const M3 &P3, const M4 &P4) { 1371 return allOf(P1, allOf(P2, P3, P4)); 1372} 1373template <typename M1, typename M2, typename M3, typename M4, typename M5> 1374internal::PolymorphicMatcherWithParam2< 1375 internal::AllOfMatcher, M1, 1376 internal::PolymorphicMatcherWithParam2< 1377 internal::AllOfMatcher, M2, 1378 internal::PolymorphicMatcherWithParam2< 1379 internal::AllOfMatcher, M3, 1380 internal::PolymorphicMatcherWithParam2<internal::AllOfMatcher, M4, 1381 M5> > > > 1382allOf(const M1 &P1, const M2 &P2, const M3 &P3, const M4 &P4, const M5 &P5) { 1383 return allOf(P1, allOf(P2, P3, P4, P5)); 1384} 1385 1386/// @} 1387 1388/// \brief Matches sizeof (C99), alignof (C++11) and vec_step (OpenCL) 1389/// 1390/// Given 1391/// \code 1392/// Foo x = bar; 1393/// int y = sizeof(x) + alignof(x); 1394/// \endcode 1395/// unaryExprOrTypeTraitExpr() 1396/// matches \c sizeof(x) and \c alignof(x) 1397const internal::VariadicDynCastAllOfMatcher< 1398 Stmt, 1399 UnaryExprOrTypeTraitExpr> unaryExprOrTypeTraitExpr; 1400 1401/// \brief Matches unary expressions that have a specific type of argument. 1402/// 1403/// Given 1404/// \code 1405/// int a, c; float b; int s = sizeof(a) + sizeof(b) + alignof(c); 1406/// \endcode 1407/// unaryExprOrTypeTraitExpr(hasArgumentOfType(asString("int")) 1408/// matches \c sizeof(a) and \c alignof(c) 1409AST_MATCHER_P(UnaryExprOrTypeTraitExpr, hasArgumentOfType, 1410 internal::Matcher<QualType>, InnerMatcher) { 1411 const QualType ArgumentType = Node.getTypeOfArgument(); 1412 return InnerMatcher.matches(ArgumentType, Finder, Builder); 1413} 1414 1415/// \brief Matches unary expressions of a certain kind. 1416/// 1417/// Given 1418/// \code 1419/// int x; 1420/// int s = sizeof(x) + alignof(x) 1421/// \endcode 1422/// unaryExprOrTypeTraitExpr(ofKind(UETT_SizeOf)) 1423/// matches \c sizeof(x) 1424AST_MATCHER_P(UnaryExprOrTypeTraitExpr, ofKind, UnaryExprOrTypeTrait, Kind) { 1425 return Node.getKind() == Kind; 1426} 1427 1428/// \brief Same as unaryExprOrTypeTraitExpr, but only matching 1429/// alignof. 1430inline internal::Matcher<Stmt> alignOfExpr( 1431 const internal::Matcher<UnaryExprOrTypeTraitExpr> &InnerMatcher) { 1432 return stmt(unaryExprOrTypeTraitExpr(allOf( 1433 ofKind(UETT_AlignOf), InnerMatcher))); 1434} 1435 1436/// \brief Same as unaryExprOrTypeTraitExpr, but only matching 1437/// sizeof. 1438inline internal::Matcher<Stmt> sizeOfExpr( 1439 const internal::Matcher<UnaryExprOrTypeTraitExpr> &InnerMatcher) { 1440 return stmt(unaryExprOrTypeTraitExpr( 1441 allOf(ofKind(UETT_SizeOf), InnerMatcher))); 1442} 1443 1444/// \brief Matches NamedDecl nodes that have the specified name. 1445/// 1446/// Supports specifying enclosing namespaces or classes by prefixing the name 1447/// with '<enclosing>::'. 1448/// Does not match typedefs of an underlying type with the given name. 1449/// 1450/// Example matches X (Name == "X") 1451/// \code 1452/// class X; 1453/// \endcode 1454/// 1455/// Example matches X (Name is one of "::a::b::X", "a::b::X", "b::X", "X") 1456/// \code 1457/// namespace a { namespace b { class X; } } 1458/// \endcode 1459AST_MATCHER_P(NamedDecl, hasName, std::string, Name) { 1460 assert(!Name.empty()); 1461 const std::string FullNameString = "::" + Node.getQualifiedNameAsString(); 1462 const StringRef FullName = FullNameString; 1463 const StringRef Pattern = Name; 1464 if (Pattern.startswith("::")) { 1465 return FullName == Pattern; 1466 } else { 1467 return FullName.endswith(("::" + Pattern).str()); 1468 } 1469} 1470 1471/// \brief Matches NamedDecl nodes whose fully qualified names contain 1472/// a substring matched by the given RegExp. 1473/// 1474/// Supports specifying enclosing namespaces or classes by 1475/// prefixing the name with '<enclosing>::'. Does not match typedefs 1476/// of an underlying type with the given name. 1477/// 1478/// Example matches X (regexp == "::X") 1479/// \code 1480/// class X; 1481/// \endcode 1482/// 1483/// Example matches X (regexp is one of "::X", "^foo::.*X", among others) 1484/// \code 1485/// namespace foo { namespace bar { class X; } } 1486/// \endcode 1487AST_MATCHER_P(NamedDecl, matchesName, std::string, RegExp) { 1488 assert(!RegExp.empty()); 1489 std::string FullNameString = "::" + Node.getQualifiedNameAsString(); 1490 llvm::Regex RE(RegExp); 1491 return RE.match(FullNameString); 1492} 1493 1494/// \brief Matches overloaded operator names. 1495/// 1496/// Matches overloaded operator names specified in strings without the 1497/// "operator" prefix: e.g. "<<". 1498/// 1499/// Given: 1500/// \code 1501/// class A { int operator*(); }; 1502/// const A &operator<<(const A &a, const A &b); 1503/// A a; 1504/// a << a; // <-- This matches 1505/// \endcode 1506/// 1507/// \c operatorCallExpr(hasOverloadedOperatorName("<<"))) matches the specified 1508/// line and \c recordDecl(hasMethod(hasOverloadedOperatorName("*"))) matches 1509/// the declaration of \c A. 1510/// 1511/// Usable as: Matcher<CXXOperatorCallExpr>, Matcher<CXXMethodDecl> 1512inline internal::PolymorphicMatcherWithParam1< 1513 internal::HasOverloadedOperatorNameMatcher, StringRef, 1514 AST_POLYMORPHIC_SUPPORTED_TYPES_2(CXXOperatorCallExpr, CXXMethodDecl)> 1515hasOverloadedOperatorName(const StringRef Name) { 1516 return internal::PolymorphicMatcherWithParam1< 1517 internal::HasOverloadedOperatorNameMatcher, StringRef, 1518 AST_POLYMORPHIC_SUPPORTED_TYPES_2(CXXOperatorCallExpr, CXXMethodDecl)>( 1519 Name); 1520} 1521 1522/// \brief Matches C++ classes that are directly or indirectly derived from 1523/// a class matching \c Base. 1524/// 1525/// Note that a class is not considered to be derived from itself. 1526/// 1527/// Example matches Y, Z, C (Base == hasName("X")) 1528/// \code 1529/// class X; 1530/// class Y : public X {}; // directly derived 1531/// class Z : public Y {}; // indirectly derived 1532/// typedef X A; 1533/// typedef A B; 1534/// class C : public B {}; // derived from a typedef of X 1535/// \endcode 1536/// 1537/// In the following example, Bar matches isDerivedFrom(hasName("X")): 1538/// \code 1539/// class Foo; 1540/// typedef Foo X; 1541/// class Bar : public Foo {}; // derived from a type that X is a typedef of 1542/// \endcode 1543AST_MATCHER_P(CXXRecordDecl, isDerivedFrom, 1544 internal::Matcher<NamedDecl>, Base) { 1545 return Finder->classIsDerivedFrom(&Node, Base, Builder); 1546} 1547 1548/// \brief Overloaded method as shortcut for \c isDerivedFrom(hasName(...)). 1549AST_MATCHER_P_OVERLOAD(CXXRecordDecl, isDerivedFrom, StringRef, BaseName, 1) { 1550 assert(!BaseName.empty()); 1551 return isDerivedFrom(hasName(BaseName)).matches(Node, Finder, Builder); 1552} 1553 1554/// \brief Similar to \c isDerivedFrom(), but also matches classes that directly 1555/// match \c Base. 1556AST_MATCHER_P_OVERLOAD(CXXRecordDecl, isSameOrDerivedFrom, 1557 internal::Matcher<NamedDecl>, Base, 0) { 1558 return Matcher<CXXRecordDecl>(anyOf(Base, isDerivedFrom(Base))) 1559 .matches(Node, Finder, Builder); 1560} 1561 1562/// \brief Overloaded method as shortcut for 1563/// \c isSameOrDerivedFrom(hasName(...)). 1564AST_MATCHER_P_OVERLOAD(CXXRecordDecl, isSameOrDerivedFrom, StringRef, BaseName, 1565 1) { 1566 assert(!BaseName.empty()); 1567 return isSameOrDerivedFrom(hasName(BaseName)).matches(Node, Finder, Builder); 1568} 1569 1570/// \brief Matches the first method of a class or struct that satisfies \c 1571/// InnerMatcher. 1572/// 1573/// Given: 1574/// \code 1575/// class A { void func(); }; 1576/// class B { void member(); }; 1577/// \code 1578/// 1579/// \c recordDecl(hasMethod(hasName("func"))) matches the declaration of \c A 1580/// but not \c B. 1581AST_MATCHER_P(CXXRecordDecl, hasMethod, internal::Matcher<CXXMethodDecl>, 1582 InnerMatcher) { 1583 return matchesFirstInPointerRange(InnerMatcher, Node.method_begin(), 1584 Node.method_end(), Finder, Builder); 1585} 1586 1587/// \brief Matches AST nodes that have child AST nodes that match the 1588/// provided matcher. 1589/// 1590/// Example matches X, Y (matcher = recordDecl(has(recordDecl(hasName("X"))) 1591/// \code 1592/// class X {}; // Matches X, because X::X is a class of name X inside X. 1593/// class Y { class X {}; }; 1594/// class Z { class Y { class X {}; }; }; // Does not match Z. 1595/// \endcode 1596/// 1597/// ChildT must be an AST base type. 1598/// 1599/// Usable as: Any Matcher 1600template <typename ChildT> 1601internal::ArgumentAdaptingMatcher<internal::HasMatcher, ChildT> has( 1602 const internal::Matcher<ChildT> &ChildMatcher) { 1603 return internal::ArgumentAdaptingMatcher<internal::HasMatcher, 1604 ChildT>(ChildMatcher); 1605} 1606 1607/// \brief Matches AST nodes that have descendant AST nodes that match the 1608/// provided matcher. 1609/// 1610/// Example matches X, Y, Z 1611/// (matcher = recordDecl(hasDescendant(recordDecl(hasName("X"))))) 1612/// \code 1613/// class X {}; // Matches X, because X::X is a class of name X inside X. 1614/// class Y { class X {}; }; 1615/// class Z { class Y { class X {}; }; }; 1616/// \endcode 1617/// 1618/// DescendantT must be an AST base type. 1619/// 1620/// Usable as: Any Matcher 1621template <typename DescendantT> 1622internal::ArgumentAdaptingMatcher<internal::HasDescendantMatcher, DescendantT> 1623hasDescendant(const internal::Matcher<DescendantT> &DescendantMatcher) { 1624 return internal::ArgumentAdaptingMatcher< 1625 internal::HasDescendantMatcher, 1626 DescendantT>(DescendantMatcher); 1627} 1628 1629/// \brief Matches AST nodes that have child AST nodes that match the 1630/// provided matcher. 1631/// 1632/// Example matches X, Y (matcher = recordDecl(forEach(recordDecl(hasName("X"))) 1633/// \code 1634/// class X {}; // Matches X, because X::X is a class of name X inside X. 1635/// class Y { class X {}; }; 1636/// class Z { class Y { class X {}; }; }; // Does not match Z. 1637/// \endcode 1638/// 1639/// ChildT must be an AST base type. 1640/// 1641/// As opposed to 'has', 'forEach' will cause a match for each result that 1642/// matches instead of only on the first one. 1643/// 1644/// Usable as: Any Matcher 1645template <typename ChildT> 1646internal::ArgumentAdaptingMatcher<internal::ForEachMatcher, ChildT> forEach( 1647 const internal::Matcher<ChildT> &ChildMatcher) { 1648 return internal::ArgumentAdaptingMatcher< 1649 internal::ForEachMatcher, 1650 ChildT>(ChildMatcher); 1651} 1652 1653/// \brief Matches AST nodes that have descendant AST nodes that match the 1654/// provided matcher. 1655/// 1656/// Example matches X, A, B, C 1657/// (matcher = recordDecl(forEachDescendant(recordDecl(hasName("X"))))) 1658/// \code 1659/// class X {}; // Matches X, because X::X is a class of name X inside X. 1660/// class A { class X {}; }; 1661/// class B { class C { class X {}; }; }; 1662/// \endcode 1663/// 1664/// DescendantT must be an AST base type. 1665/// 1666/// As opposed to 'hasDescendant', 'forEachDescendant' will cause a match for 1667/// each result that matches instead of only on the first one. 1668/// 1669/// Note: Recursively combined ForEachDescendant can cause many matches: 1670/// recordDecl(forEachDescendant(recordDecl(forEachDescendant(recordDecl())))) 1671/// will match 10 times (plus injected class name matches) on: 1672/// \code 1673/// class A { class B { class C { class D { class E {}; }; }; }; }; 1674/// \endcode 1675/// 1676/// Usable as: Any Matcher 1677template <typename DescendantT> 1678internal::ArgumentAdaptingMatcher<internal::ForEachDescendantMatcher, 1679 DescendantT> 1680forEachDescendant( 1681 const internal::Matcher<DescendantT> &DescendantMatcher) { 1682 return internal::ArgumentAdaptingMatcher< 1683 internal::ForEachDescendantMatcher, 1684 DescendantT>(DescendantMatcher); 1685} 1686 1687/// \brief Matches if the node or any descendant matches. 1688/// 1689/// Generates results for each match. 1690/// 1691/// For example, in: 1692/// \code 1693/// class A { class B {}; class C {}; }; 1694/// \endcode 1695/// The matcher: 1696/// \code 1697/// recordDecl(hasName("::A"), findAll(recordDecl(isDefinition()).bind("m"))) 1698/// \endcode 1699/// will generate results for \c A, \c B and \c C. 1700/// 1701/// Usable as: Any Matcher 1702template <typename T> 1703internal::PolymorphicMatcherWithParam2< 1704 internal::EachOfMatcher, internal::Matcher<T>, 1705 internal::ArgumentAdaptingMatcher<internal::ForEachDescendantMatcher, T> > 1706findAll(const internal::Matcher<T> &Matcher) { 1707 return eachOf(Matcher, forEachDescendant(Matcher)); 1708} 1709 1710/// \brief Matches AST nodes that have a parent that matches the provided 1711/// matcher. 1712/// 1713/// Given 1714/// \code 1715/// void f() { for (;;) { int x = 42; if (true) { int x = 43; } } } 1716/// \endcode 1717/// \c compoundStmt(hasParent(ifStmt())) matches "{ int x = 43; }". 1718/// 1719/// Usable as: Any Matcher 1720template <typename ParentT> 1721internal::ArgumentAdaptingMatcher<internal::HasParentMatcher, ParentT, 1722 internal::TypeList<Decl, Stmt>, 1723 internal::TypeList<Decl, Stmt> > 1724hasParent(const internal::Matcher<ParentT> &ParentMatcher) { 1725 return internal::ArgumentAdaptingMatcher< 1726 internal::HasParentMatcher, ParentT, internal::TypeList<Decl, Stmt>, 1727 internal::TypeList<Decl, Stmt> >(ParentMatcher); 1728} 1729 1730/// \brief Matches AST nodes that have an ancestor that matches the provided 1731/// matcher. 1732/// 1733/// Given 1734/// \code 1735/// void f() { if (true) { int x = 42; } } 1736/// void g() { for (;;) { int x = 43; } } 1737/// \endcode 1738/// \c expr(integerLiteral(hasAncestor(ifStmt()))) matches \c 42, but not 43. 1739/// 1740/// Usable as: Any Matcher 1741template <typename AncestorT> 1742internal::ArgumentAdaptingMatcher<internal::HasAncestorMatcher, AncestorT, 1743 internal::TypeList<Decl, Stmt>, 1744 internal::TypeList<Decl, Stmt> > 1745hasAncestor(const internal::Matcher<AncestorT> &AncestorMatcher) { 1746 return internal::ArgumentAdaptingMatcher< 1747 internal::HasAncestorMatcher, AncestorT, internal::TypeList<Decl, Stmt>, 1748 internal::TypeList<Decl, Stmt> >(AncestorMatcher); 1749} 1750 1751/// \brief Matches if the provided matcher does not match. 1752/// 1753/// Example matches Y (matcher = recordDecl(unless(hasName("X")))) 1754/// \code 1755/// class X {}; 1756/// class Y {}; 1757/// \endcode 1758/// 1759/// Usable as: Any Matcher 1760template <typename M> 1761internal::PolymorphicMatcherWithParam1<internal::NotMatcher, M> 1762unless(const M &InnerMatcher) { 1763 return internal::PolymorphicMatcherWithParam1< 1764 internal::NotMatcher, M>(InnerMatcher); 1765} 1766 1767/// \brief Matches a node if the declaration associated with that node 1768/// matches the given matcher. 1769/// 1770/// The associated declaration is: 1771/// - for type nodes, the declaration of the underlying type 1772/// - for CallExpr, the declaration of the callee 1773/// - for MemberExpr, the declaration of the referenced member 1774/// - for CXXConstructExpr, the declaration of the constructor 1775/// 1776/// Also usable as Matcher<T> for any T supporting the getDecl() member 1777/// function. e.g. various subtypes of clang::Type and various expressions. 1778/// FIXME: Add all node types for which this is matcher is usable due to 1779/// getDecl(). 1780/// 1781/// Usable as: Matcher<QualType>, Matcher<CallExpr>, Matcher<CXXConstructExpr>, 1782/// Matcher<MemberExpr>, Matcher<TypedefType>, 1783/// Matcher<TemplateSpecializationType> 1784inline internal::PolymorphicMatcherWithParam1< internal::HasDeclarationMatcher, 1785 internal::Matcher<Decl> > 1786 hasDeclaration(const internal::Matcher<Decl> &InnerMatcher) { 1787 return internal::PolymorphicMatcherWithParam1< 1788 internal::HasDeclarationMatcher, 1789 internal::Matcher<Decl> >(InnerMatcher); 1790} 1791 1792/// \brief Matches on the implicit object argument of a member call expression. 1793/// 1794/// Example matches y.x() (matcher = callExpr(on(hasType(recordDecl(hasName("Y")))))) 1795/// \code 1796/// class Y { public: void x(); }; 1797/// void z() { Y y; y.x(); }", 1798/// \endcode 1799/// 1800/// FIXME: Overload to allow directly matching types? 1801AST_MATCHER_P(CXXMemberCallExpr, on, internal::Matcher<Expr>, 1802 InnerMatcher) { 1803 const Expr *ExprNode = Node.getImplicitObjectArgument() 1804 ->IgnoreParenImpCasts(); 1805 return (ExprNode != NULL && 1806 InnerMatcher.matches(*ExprNode, Finder, Builder)); 1807} 1808 1809/// \brief Matches if the call expression's callee expression matches. 1810/// 1811/// Given 1812/// \code 1813/// class Y { void x() { this->x(); x(); Y y; y.x(); } }; 1814/// void f() { f(); } 1815/// \endcode 1816/// callExpr(callee(expr())) 1817/// matches this->x(), x(), y.x(), f() 1818/// with callee(...) 1819/// matching this->x, x, y.x, f respectively 1820/// 1821/// Note: Callee cannot take the more general internal::Matcher<Expr> 1822/// because this introduces ambiguous overloads with calls to Callee taking a 1823/// internal::Matcher<Decl>, as the matcher hierarchy is purely 1824/// implemented in terms of implicit casts. 1825AST_MATCHER_P(CallExpr, callee, internal::Matcher<Stmt>, 1826 InnerMatcher) { 1827 const Expr *ExprNode = Node.getCallee(); 1828 return (ExprNode != NULL && 1829 InnerMatcher.matches(*ExprNode, Finder, Builder)); 1830} 1831 1832/// \brief Matches if the call expression's callee's declaration matches the 1833/// given matcher. 1834/// 1835/// Example matches y.x() (matcher = callExpr(callee(methodDecl(hasName("x"))))) 1836/// \code 1837/// class Y { public: void x(); }; 1838/// void z() { Y y; y.x(); 1839/// \endcode 1840AST_MATCHER_P_OVERLOAD(CallExpr, callee, internal::Matcher<Decl>, InnerMatcher, 1841 1) { 1842 return callExpr(hasDeclaration(InnerMatcher)).matches(Node, Finder, Builder); 1843} 1844 1845/// \brief Matches if the expression's or declaration's type matches a type 1846/// matcher. 1847/// 1848/// Example matches x (matcher = expr(hasType(recordDecl(hasName("X"))))) 1849/// and z (matcher = varDecl(hasType(recordDecl(hasName("X"))))) 1850/// \code 1851/// class X {}; 1852/// void y(X &x) { x; X z; } 1853/// \endcode 1854AST_POLYMORPHIC_MATCHER_P_OVERLOAD( 1855 hasType, AST_POLYMORPHIC_SUPPORTED_TYPES_2(Expr, ValueDecl), 1856 internal::Matcher<QualType>, InnerMatcher, 0) { 1857 return InnerMatcher.matches(Node.getType(), Finder, Builder); 1858} 1859 1860/// \brief Overloaded to match the declaration of the expression's or value 1861/// declaration's type. 1862/// 1863/// In case of a value declaration (for example a variable declaration), 1864/// this resolves one layer of indirection. For example, in the value 1865/// declaration "X x;", recordDecl(hasName("X")) matches the declaration of X, 1866/// while varDecl(hasType(recordDecl(hasName("X")))) matches the declaration 1867/// of x." 1868/// 1869/// Example matches x (matcher = expr(hasType(recordDecl(hasName("X"))))) 1870/// and z (matcher = varDecl(hasType(recordDecl(hasName("X"))))) 1871/// \code 1872/// class X {}; 1873/// void y(X &x) { x; X z; } 1874/// \endcode 1875/// 1876/// Usable as: Matcher<Expr>, Matcher<ValueDecl> 1877AST_POLYMORPHIC_MATCHER_P_OVERLOAD( 1878 hasType, AST_POLYMORPHIC_SUPPORTED_TYPES_2(Expr, ValueDecl), 1879 internal::Matcher<Decl>, InnerMatcher, 1) { 1880 return qualType(hasDeclaration(InnerMatcher)) 1881 .matches(Node.getType(), Finder, Builder); 1882} 1883 1884/// \brief Matches if the type location of the declarator decl's type matches 1885/// the inner matcher. 1886/// 1887/// Given 1888/// \code 1889/// int x; 1890/// \endcode 1891/// declaratorDecl(hasTypeLoc(loc(asString("int")))) 1892/// matches int x 1893AST_MATCHER_P(DeclaratorDecl, hasTypeLoc, internal::Matcher<TypeLoc>, Inner) { 1894 if (!Node.getTypeSourceInfo()) 1895 // This happens for example for implicit destructors. 1896 return false; 1897 return Inner.matches(Node.getTypeSourceInfo()->getTypeLoc(), Finder, Builder); 1898} 1899 1900/// \brief Matches if the matched type is represented by the given string. 1901/// 1902/// Given 1903/// \code 1904/// class Y { public: void x(); }; 1905/// void z() { Y* y; y->x(); } 1906/// \endcode 1907/// callExpr(on(hasType(asString("class Y *")))) 1908/// matches y->x() 1909AST_MATCHER_P(QualType, asString, std::string, Name) { 1910 return Name == Node.getAsString(); 1911} 1912 1913/// \brief Matches if the matched type is a pointer type and the pointee type 1914/// matches the specified matcher. 1915/// 1916/// Example matches y->x() 1917/// (matcher = callExpr(on(hasType(pointsTo(recordDecl(hasName("Y"))))))) 1918/// \code 1919/// class Y { public: void x(); }; 1920/// void z() { Y *y; y->x(); } 1921/// \endcode 1922AST_MATCHER_P( 1923 QualType, pointsTo, internal::Matcher<QualType>, 1924 InnerMatcher) { 1925 return (!Node.isNull() && Node->isPointerType() && 1926 InnerMatcher.matches(Node->getPointeeType(), Finder, Builder)); 1927} 1928 1929/// \brief Overloaded to match the pointee type's declaration. 1930AST_MATCHER_P_OVERLOAD(QualType, pointsTo, internal::Matcher<Decl>, 1931 InnerMatcher, 1) { 1932 return pointsTo(qualType(hasDeclaration(InnerMatcher))) 1933 .matches(Node, Finder, Builder); 1934} 1935 1936/// \brief Matches if the matched type is a reference type and the referenced 1937/// type matches the specified matcher. 1938/// 1939/// Example matches X &x and const X &y 1940/// (matcher = varDecl(hasType(references(recordDecl(hasName("X")))))) 1941/// \code 1942/// class X { 1943/// void a(X b) { 1944/// X &x = b; 1945/// const X &y = b; 1946/// }; 1947/// \endcode 1948AST_MATCHER_P(QualType, references, internal::Matcher<QualType>, 1949 InnerMatcher) { 1950 return (!Node.isNull() && Node->isReferenceType() && 1951 InnerMatcher.matches(Node->getPointeeType(), Finder, Builder)); 1952} 1953 1954/// \brief Matches QualTypes whose canonical type matches InnerMatcher. 1955/// 1956/// Given: 1957/// \code 1958/// typedef int &int_ref; 1959/// int a; 1960/// int_ref b = a; 1961/// \code 1962/// 1963/// \c varDecl(hasType(qualType(referenceType()))))) will not match the 1964/// declaration of b but \c 1965/// varDecl(hasType(qualType(hasCanonicalType(referenceType())))))) does. 1966AST_MATCHER_P(QualType, hasCanonicalType, internal::Matcher<QualType>, 1967 InnerMatcher) { 1968 if (Node.isNull()) 1969 return false; 1970 return InnerMatcher.matches(Node.getCanonicalType(), Finder, Builder); 1971} 1972 1973/// \brief Overloaded to match the referenced type's declaration. 1974AST_MATCHER_P_OVERLOAD(QualType, references, internal::Matcher<Decl>, 1975 InnerMatcher, 1) { 1976 return references(qualType(hasDeclaration(InnerMatcher))) 1977 .matches(Node, Finder, Builder); 1978} 1979 1980AST_MATCHER_P(CXXMemberCallExpr, onImplicitObjectArgument, 1981 internal::Matcher<Expr>, InnerMatcher) { 1982 const Expr *ExprNode = Node.getImplicitObjectArgument(); 1983 return (ExprNode != NULL && 1984 InnerMatcher.matches(*ExprNode, Finder, Builder)); 1985} 1986 1987/// \brief Matches if the expression's type either matches the specified 1988/// matcher, or is a pointer to a type that matches the InnerMatcher. 1989AST_MATCHER_P_OVERLOAD(CXXMemberCallExpr, thisPointerType, 1990 internal::Matcher<QualType>, InnerMatcher, 0) { 1991 return onImplicitObjectArgument( 1992 anyOf(hasType(InnerMatcher), hasType(pointsTo(InnerMatcher)))) 1993 .matches(Node, Finder, Builder); 1994} 1995 1996/// \brief Overloaded to match the type's declaration. 1997AST_MATCHER_P_OVERLOAD(CXXMemberCallExpr, thisPointerType, 1998 internal::Matcher<Decl>, InnerMatcher, 1) { 1999 return onImplicitObjectArgument( 2000 anyOf(hasType(InnerMatcher), hasType(pointsTo(InnerMatcher)))) 2001 .matches(Node, Finder, Builder); 2002} 2003 2004/// \brief Matches a DeclRefExpr that refers to a declaration that matches the 2005/// specified matcher. 2006/// 2007/// Example matches x in if(x) 2008/// (matcher = declRefExpr(to(varDecl(hasName("x"))))) 2009/// \code 2010/// bool x; 2011/// if (x) {} 2012/// \endcode 2013AST_MATCHER_P(DeclRefExpr, to, internal::Matcher<Decl>, 2014 InnerMatcher) { 2015 const Decl *DeclNode = Node.getDecl(); 2016 return (DeclNode != NULL && 2017 InnerMatcher.matches(*DeclNode, Finder, Builder)); 2018} 2019 2020/// \brief Matches a \c DeclRefExpr that refers to a declaration through a 2021/// specific using shadow declaration. 2022/// 2023/// FIXME: This currently only works for functions. Fix. 2024/// 2025/// Given 2026/// \code 2027/// namespace a { void f() {} } 2028/// using a::f; 2029/// void g() { 2030/// f(); // Matches this .. 2031/// a::f(); // .. but not this. 2032/// } 2033/// \endcode 2034/// declRefExpr(throughUsingDeclaration(anything())) 2035/// matches \c f() 2036AST_MATCHER_P(DeclRefExpr, throughUsingDecl, 2037 internal::Matcher<UsingShadowDecl>, InnerMatcher) { 2038 const NamedDecl *FoundDecl = Node.getFoundDecl(); 2039 if (const UsingShadowDecl *UsingDecl = dyn_cast<UsingShadowDecl>(FoundDecl)) 2040 return InnerMatcher.matches(*UsingDecl, Finder, Builder); 2041 return false; 2042} 2043 2044/// \brief Matches the Decl of a DeclStmt which has a single declaration. 2045/// 2046/// Given 2047/// \code 2048/// int a, b; 2049/// int c; 2050/// \endcode 2051/// declStmt(hasSingleDecl(anything())) 2052/// matches 'int c;' but not 'int a, b;'. 2053AST_MATCHER_P(DeclStmt, hasSingleDecl, internal::Matcher<Decl>, InnerMatcher) { 2054 if (Node.isSingleDecl()) { 2055 const Decl *FoundDecl = Node.getSingleDecl(); 2056 return InnerMatcher.matches(*FoundDecl, Finder, Builder); 2057 } 2058 return false; 2059} 2060 2061/// \brief Matches a variable declaration that has an initializer expression 2062/// that matches the given matcher. 2063/// 2064/// Example matches x (matcher = varDecl(hasInitializer(callExpr()))) 2065/// \code 2066/// bool y() { return true; } 2067/// bool x = y(); 2068/// \endcode 2069AST_MATCHER_P( 2070 VarDecl, hasInitializer, internal::Matcher<Expr>, 2071 InnerMatcher) { 2072 const Expr *Initializer = Node.getAnyInitializer(); 2073 return (Initializer != NULL && 2074 InnerMatcher.matches(*Initializer, Finder, Builder)); 2075} 2076 2077/// \brief Checks that a call expression or a constructor call expression has 2078/// a specific number of arguments (including absent default arguments). 2079/// 2080/// Example matches f(0, 0) (matcher = callExpr(argumentCountIs(2))) 2081/// \code 2082/// void f(int x, int y); 2083/// f(0, 0); 2084/// \endcode 2085AST_POLYMORPHIC_MATCHER_P(argumentCountIs, AST_POLYMORPHIC_SUPPORTED_TYPES_2( 2086 CallExpr, CXXConstructExpr), 2087 unsigned, N) { 2088 return Node.getNumArgs() == N; 2089} 2090 2091/// \brief Matches the n'th argument of a call expression or a constructor 2092/// call expression. 2093/// 2094/// Example matches y in x(y) 2095/// (matcher = callExpr(hasArgument(0, declRefExpr()))) 2096/// \code 2097/// void x(int) { int y; x(y); } 2098/// \endcode 2099AST_POLYMORPHIC_MATCHER_P2( 2100 hasArgument, 2101 AST_POLYMORPHIC_SUPPORTED_TYPES_2(CallExpr, CXXConstructExpr), 2102 unsigned, N, internal::Matcher<Expr>, InnerMatcher) { 2103 return (N < Node.getNumArgs() && 2104 InnerMatcher.matches( 2105 *Node.getArg(N)->IgnoreParenImpCasts(), Finder, Builder)); 2106} 2107 2108/// \brief Matches declaration statements that contain a specific number of 2109/// declarations. 2110/// 2111/// Example: Given 2112/// \code 2113/// int a, b; 2114/// int c; 2115/// int d = 2, e; 2116/// \endcode 2117/// declCountIs(2) 2118/// matches 'int a, b;' and 'int d = 2, e;', but not 'int c;'. 2119AST_MATCHER_P(DeclStmt, declCountIs, unsigned, N) { 2120 return std::distance(Node.decl_begin(), Node.decl_end()) == (ptrdiff_t)N; 2121} 2122 2123/// \brief Matches the n'th declaration of a declaration statement. 2124/// 2125/// Note that this does not work for global declarations because the AST 2126/// breaks up multiple-declaration DeclStmt's into multiple single-declaration 2127/// DeclStmt's. 2128/// Example: Given non-global declarations 2129/// \code 2130/// int a, b = 0; 2131/// int c; 2132/// int d = 2, e; 2133/// \endcode 2134/// declStmt(containsDeclaration( 2135/// 0, varDecl(hasInitializer(anything())))) 2136/// matches only 'int d = 2, e;', and 2137/// declStmt(containsDeclaration(1, varDecl())) 2138/// \code 2139/// matches 'int a, b = 0' as well as 'int d = 2, e;' 2140/// but 'int c;' is not matched. 2141/// \endcode 2142AST_MATCHER_P2(DeclStmt, containsDeclaration, unsigned, N, 2143 internal::Matcher<Decl>, InnerMatcher) { 2144 const unsigned NumDecls = std::distance(Node.decl_begin(), Node.decl_end()); 2145 if (N >= NumDecls) 2146 return false; 2147 DeclStmt::const_decl_iterator Iterator = Node.decl_begin(); 2148 std::advance(Iterator, N); 2149 return InnerMatcher.matches(**Iterator, Finder, Builder); 2150} 2151 2152/// \brief Matches a constructor initializer. 2153/// 2154/// Given 2155/// \code 2156/// struct Foo { 2157/// Foo() : foo_(1) { } 2158/// int foo_; 2159/// }; 2160/// \endcode 2161/// recordDecl(has(constructorDecl(hasAnyConstructorInitializer(anything())))) 2162/// record matches Foo, hasAnyConstructorInitializer matches foo_(1) 2163AST_MATCHER_P(CXXConstructorDecl, hasAnyConstructorInitializer, 2164 internal::Matcher<CXXCtorInitializer>, InnerMatcher) { 2165 return matchesFirstInPointerRange(InnerMatcher, Node.init_begin(), 2166 Node.init_end(), Finder, Builder); 2167} 2168 2169/// \brief Matches the field declaration of a constructor initializer. 2170/// 2171/// Given 2172/// \code 2173/// struct Foo { 2174/// Foo() : foo_(1) { } 2175/// int foo_; 2176/// }; 2177/// \endcode 2178/// recordDecl(has(constructorDecl(hasAnyConstructorInitializer( 2179/// forField(hasName("foo_")))))) 2180/// matches Foo 2181/// with forField matching foo_ 2182AST_MATCHER_P(CXXCtorInitializer, forField, 2183 internal::Matcher<FieldDecl>, InnerMatcher) { 2184 const FieldDecl *NodeAsDecl = Node.getMember(); 2185 return (NodeAsDecl != NULL && 2186 InnerMatcher.matches(*NodeAsDecl, Finder, Builder)); 2187} 2188 2189/// \brief Matches the initializer expression of a constructor initializer. 2190/// 2191/// Given 2192/// \code 2193/// struct Foo { 2194/// Foo() : foo_(1) { } 2195/// int foo_; 2196/// }; 2197/// \endcode 2198/// recordDecl(has(constructorDecl(hasAnyConstructorInitializer( 2199/// withInitializer(integerLiteral(equals(1))))))) 2200/// matches Foo 2201/// with withInitializer matching (1) 2202AST_MATCHER_P(CXXCtorInitializer, withInitializer, 2203 internal::Matcher<Expr>, InnerMatcher) { 2204 const Expr* NodeAsExpr = Node.getInit(); 2205 return (NodeAsExpr != NULL && 2206 InnerMatcher.matches(*NodeAsExpr, Finder, Builder)); 2207} 2208 2209/// \brief Matches a contructor initializer if it is explicitly written in 2210/// code (as opposed to implicitly added by the compiler). 2211/// 2212/// Given 2213/// \code 2214/// struct Foo { 2215/// Foo() { } 2216/// Foo(int) : foo_("A") { } 2217/// string foo_; 2218/// }; 2219/// \endcode 2220/// constructorDecl(hasAnyConstructorInitializer(isWritten())) 2221/// will match Foo(int), but not Foo() 2222AST_MATCHER(CXXCtorInitializer, isWritten) { 2223 return Node.isWritten(); 2224} 2225 2226/// \brief Matches a constructor declaration that has been implicitly added 2227/// by the compiler (eg. implicit default/copy constructors). 2228AST_MATCHER(CXXConstructorDecl, isImplicit) { 2229 return Node.isImplicit(); 2230} 2231 2232/// \brief Matches any argument of a call expression or a constructor call 2233/// expression. 2234/// 2235/// Given 2236/// \code 2237/// void x(int, int, int) { int y; x(1, y, 42); } 2238/// \endcode 2239/// callExpr(hasAnyArgument(declRefExpr())) 2240/// matches x(1, y, 42) 2241/// with hasAnyArgument(...) 2242/// matching y 2243/// 2244/// FIXME: Currently this will ignore parentheses and implicit casts on 2245/// the argument before applying the inner matcher. We'll want to remove 2246/// this to allow for greater control by the user once \c ignoreImplicit() 2247/// has been implemented. 2248AST_POLYMORPHIC_MATCHER_P(hasAnyArgument, AST_POLYMORPHIC_SUPPORTED_TYPES_2( 2249 CallExpr, CXXConstructExpr), 2250 internal::Matcher<Expr>, InnerMatcher) { 2251 for (unsigned I = 0; I < Node.getNumArgs(); ++I) { 2252 BoundNodesTreeBuilder Result(*Builder); 2253 if (InnerMatcher.matches(*Node.getArg(I)->IgnoreParenImpCasts(), Finder, 2254 &Result)) { 2255 *Builder = Result; 2256 return true; 2257 } 2258 } 2259 return false; 2260} 2261 2262/// \brief Matches the n'th parameter of a function declaration. 2263/// 2264/// Given 2265/// \code 2266/// class X { void f(int x) {} }; 2267/// \endcode 2268/// methodDecl(hasParameter(0, hasType(varDecl()))) 2269/// matches f(int x) {} 2270/// with hasParameter(...) 2271/// matching int x 2272AST_MATCHER_P2(FunctionDecl, hasParameter, 2273 unsigned, N, internal::Matcher<ParmVarDecl>, 2274 InnerMatcher) { 2275 return (N < Node.getNumParams() && 2276 InnerMatcher.matches( 2277 *Node.getParamDecl(N), Finder, Builder)); 2278} 2279 2280/// \brief Matches any parameter of a function declaration. 2281/// 2282/// Does not match the 'this' parameter of a method. 2283/// 2284/// Given 2285/// \code 2286/// class X { void f(int x, int y, int z) {} }; 2287/// \endcode 2288/// methodDecl(hasAnyParameter(hasName("y"))) 2289/// matches f(int x, int y, int z) {} 2290/// with hasAnyParameter(...) 2291/// matching int y 2292AST_MATCHER_P(FunctionDecl, hasAnyParameter, 2293 internal::Matcher<ParmVarDecl>, InnerMatcher) { 2294 return matchesFirstInPointerRange(InnerMatcher, Node.param_begin(), 2295 Node.param_end(), Finder, Builder); 2296} 2297 2298/// \brief Matches \c FunctionDecls that have a specific parameter count. 2299/// 2300/// Given 2301/// \code 2302/// void f(int i) {} 2303/// void g(int i, int j) {} 2304/// \endcode 2305/// functionDecl(parameterCountIs(2)) 2306/// matches g(int i, int j) {} 2307AST_MATCHER_P(FunctionDecl, parameterCountIs, unsigned, N) { 2308 return Node.getNumParams() == N; 2309} 2310 2311/// \brief Matches the return type of a function declaration. 2312/// 2313/// Given: 2314/// \code 2315/// class X { int f() { return 1; } }; 2316/// \endcode 2317/// methodDecl(returns(asString("int"))) 2318/// matches int f() { return 1; } 2319AST_MATCHER_P(FunctionDecl, returns, 2320 internal::Matcher<QualType>, InnerMatcher) { 2321 return InnerMatcher.matches(Node.getResultType(), Finder, Builder); 2322} 2323 2324/// \brief Matches extern "C" function declarations. 2325/// 2326/// Given: 2327/// \code 2328/// extern "C" void f() {} 2329/// extern "C" { void g() {} } 2330/// void h() {} 2331/// \endcode 2332/// functionDecl(isExternC()) 2333/// matches the declaration of f and g, but not the declaration h 2334AST_MATCHER(FunctionDecl, isExternC) { 2335 return Node.isExternC(); 2336} 2337 2338/// \brief Matches the condition expression of an if statement, for loop, 2339/// or conditional operator. 2340/// 2341/// Example matches true (matcher = hasCondition(boolLiteral(equals(true)))) 2342/// \code 2343/// if (true) {} 2344/// \endcode 2345AST_POLYMORPHIC_MATCHER_P( 2346 hasCondition, AST_POLYMORPHIC_SUPPORTED_TYPES_5( 2347 IfStmt, ForStmt, WhileStmt, DoStmt, ConditionalOperator), 2348 internal::Matcher<Expr>, InnerMatcher) { 2349 const Expr *const Condition = Node.getCond(); 2350 return (Condition != NULL && 2351 InnerMatcher.matches(*Condition, Finder, Builder)); 2352} 2353 2354namespace internal { 2355struct NotEqualsBoundNodePredicate { 2356 bool operator()(const internal::BoundNodesMap &Nodes) const { 2357 return Nodes.getNode(ID) != Node; 2358 } 2359 std::string ID; 2360 ast_type_traits::DynTypedNode Node; 2361}; 2362} // namespace internal 2363 2364/// \brief Matches if a node equals a previously bound node. 2365/// 2366/// Matches a node if it equals the node previously bound to \p ID. 2367/// 2368/// Given 2369/// \code 2370/// class X { int a; int b; }; 2371/// \endcode 2372/// recordDecl( 2373/// has(fieldDecl(hasName("a"), hasType(type().bind("t")))), 2374/// has(fieldDecl(hasName("b"), hasType(type(equalsBoundNode("t")))))) 2375/// matches the class \c X, as \c a and \c b have the same type. 2376/// 2377/// Note that when multiple matches are involved via \c forEach* matchers, 2378/// \c equalsBoundNodes acts as a filter. 2379/// For example: 2380/// compoundStmt( 2381/// forEachDescendant(varDecl().bind("d")), 2382/// forEachDescendant(declRefExpr(to(decl(equalsBoundNode("d")))))) 2383/// will trigger a match for each combination of variable declaration 2384/// and reference to that variable declaration within a compound statement. 2385AST_POLYMORPHIC_MATCHER_P(equalsBoundNode, AST_POLYMORPHIC_SUPPORTED_TYPES_4( 2386 Stmt, Decl, Type, QualType), 2387 std::string, ID) { 2388 // FIXME: Figure out whether it makes sense to allow this 2389 // on any other node types. 2390 // For *Loc it probably does not make sense, as those seem 2391 // unique. For NestedNameSepcifier it might make sense, as 2392 // those also have pointer identity, but I'm not sure whether 2393 // they're ever reused. 2394 internal::NotEqualsBoundNodePredicate Predicate; 2395 Predicate.ID = ID; 2396 Predicate.Node = ast_type_traits::DynTypedNode::create(Node); 2397 return Builder->removeBindings(Predicate); 2398} 2399 2400/// \brief Matches the condition variable statement in an if statement. 2401/// 2402/// Given 2403/// \code 2404/// if (A* a = GetAPointer()) {} 2405/// \endcode 2406/// hasConditionVariableStatment(...) 2407/// matches 'A* a = GetAPointer()'. 2408AST_MATCHER_P(IfStmt, hasConditionVariableStatement, 2409 internal::Matcher<DeclStmt>, InnerMatcher) { 2410 const DeclStmt* const DeclarationStatement = 2411 Node.getConditionVariableDeclStmt(); 2412 return DeclarationStatement != NULL && 2413 InnerMatcher.matches(*DeclarationStatement, Finder, Builder); 2414} 2415 2416/// \brief Matches the index expression of an array subscript expression. 2417/// 2418/// Given 2419/// \code 2420/// int i[5]; 2421/// void f() { i[1] = 42; } 2422/// \endcode 2423/// arraySubscriptExpression(hasIndex(integerLiteral())) 2424/// matches \c i[1] with the \c integerLiteral() matching \c 1 2425AST_MATCHER_P(ArraySubscriptExpr, hasIndex, 2426 internal::Matcher<Expr>, InnerMatcher) { 2427 if (const Expr* Expression = Node.getIdx()) 2428 return InnerMatcher.matches(*Expression, Finder, Builder); 2429 return false; 2430} 2431 2432/// \brief Matches the base expression of an array subscript expression. 2433/// 2434/// Given 2435/// \code 2436/// int i[5]; 2437/// void f() { i[1] = 42; } 2438/// \endcode 2439/// arraySubscriptExpression(hasBase(implicitCastExpr( 2440/// hasSourceExpression(declRefExpr())))) 2441/// matches \c i[1] with the \c declRefExpr() matching \c i 2442AST_MATCHER_P(ArraySubscriptExpr, hasBase, 2443 internal::Matcher<Expr>, InnerMatcher) { 2444 if (const Expr* Expression = Node.getBase()) 2445 return InnerMatcher.matches(*Expression, Finder, Builder); 2446 return false; 2447} 2448 2449/// \brief Matches a 'for', 'while', or 'do while' statement that has 2450/// a given body. 2451/// 2452/// Given 2453/// \code 2454/// for (;;) {} 2455/// \endcode 2456/// hasBody(compoundStmt()) 2457/// matches 'for (;;) {}' 2458/// with compoundStmt() 2459/// matching '{}' 2460AST_POLYMORPHIC_MATCHER_P( 2461 hasBody, AST_POLYMORPHIC_SUPPORTED_TYPES_3(DoStmt, ForStmt, WhileStmt), 2462 internal::Matcher<Stmt>, InnerMatcher) { 2463 const Stmt *const Statement = Node.getBody(); 2464 return (Statement != NULL && 2465 InnerMatcher.matches(*Statement, Finder, Builder)); 2466} 2467 2468/// \brief Matches compound statements where at least one substatement matches 2469/// a given matcher. 2470/// 2471/// Given 2472/// \code 2473/// { {}; 1+2; } 2474/// \endcode 2475/// hasAnySubstatement(compoundStmt()) 2476/// matches '{ {}; 1+2; }' 2477/// with compoundStmt() 2478/// matching '{}' 2479AST_MATCHER_P(CompoundStmt, hasAnySubstatement, 2480 internal::Matcher<Stmt>, InnerMatcher) { 2481 return matchesFirstInPointerRange(InnerMatcher, Node.body_begin(), 2482 Node.body_end(), Finder, Builder); 2483} 2484 2485/// \brief Checks that a compound statement contains a specific number of 2486/// child statements. 2487/// 2488/// Example: Given 2489/// \code 2490/// { for (;;) {} } 2491/// \endcode 2492/// compoundStmt(statementCountIs(0))) 2493/// matches '{}' 2494/// but does not match the outer compound statement. 2495AST_MATCHER_P(CompoundStmt, statementCountIs, unsigned, N) { 2496 return Node.size() == N; 2497} 2498 2499/// \brief Matches literals that are equal to the given value. 2500/// 2501/// Example matches true (matcher = boolLiteral(equals(true))) 2502/// \code 2503/// true 2504/// \endcode 2505/// 2506/// Usable as: Matcher<CharacterLiteral>, Matcher<CXXBoolLiteral>, 2507/// Matcher<FloatingLiteral>, Matcher<IntegerLiteral> 2508template <typename ValueT> 2509internal::PolymorphicMatcherWithParam1<internal::ValueEqualsMatcher, ValueT> 2510equals(const ValueT &Value) { 2511 return internal::PolymorphicMatcherWithParam1< 2512 internal::ValueEqualsMatcher, 2513 ValueT>(Value); 2514} 2515 2516/// \brief Matches the operator Name of operator expressions (binary or 2517/// unary). 2518/// 2519/// Example matches a || b (matcher = binaryOperator(hasOperatorName("||"))) 2520/// \code 2521/// !(a || b) 2522/// \endcode 2523AST_POLYMORPHIC_MATCHER_P(hasOperatorName, AST_POLYMORPHIC_SUPPORTED_TYPES_2( 2524 BinaryOperator, UnaryOperator), 2525 std::string, Name) { 2526 return Name == Node.getOpcodeStr(Node.getOpcode()); 2527} 2528 2529/// \brief Matches the left hand side of binary operator expressions. 2530/// 2531/// Example matches a (matcher = binaryOperator(hasLHS())) 2532/// \code 2533/// a || b 2534/// \endcode 2535AST_MATCHER_P(BinaryOperator, hasLHS, 2536 internal::Matcher<Expr>, InnerMatcher) { 2537 Expr *LeftHandSide = Node.getLHS(); 2538 return (LeftHandSide != NULL && 2539 InnerMatcher.matches(*LeftHandSide, Finder, Builder)); 2540} 2541 2542/// \brief Matches the right hand side of binary operator expressions. 2543/// 2544/// Example matches b (matcher = binaryOperator(hasRHS())) 2545/// \code 2546/// a || b 2547/// \endcode 2548AST_MATCHER_P(BinaryOperator, hasRHS, 2549 internal::Matcher<Expr>, InnerMatcher) { 2550 Expr *RightHandSide = Node.getRHS(); 2551 return (RightHandSide != NULL && 2552 InnerMatcher.matches(*RightHandSide, Finder, Builder)); 2553} 2554 2555/// \brief Matches if either the left hand side or the right hand side of a 2556/// binary operator matches. 2557inline internal::Matcher<BinaryOperator> hasEitherOperand( 2558 const internal::Matcher<Expr> &InnerMatcher) { 2559 return anyOf(hasLHS(InnerMatcher), hasRHS(InnerMatcher)); 2560} 2561 2562/// \brief Matches if the operand of a unary operator matches. 2563/// 2564/// Example matches true (matcher = hasUnaryOperand(boolLiteral(equals(true)))) 2565/// \code 2566/// !true 2567/// \endcode 2568AST_MATCHER_P(UnaryOperator, hasUnaryOperand, 2569 internal::Matcher<Expr>, InnerMatcher) { 2570 const Expr * const Operand = Node.getSubExpr(); 2571 return (Operand != NULL && 2572 InnerMatcher.matches(*Operand, Finder, Builder)); 2573} 2574 2575/// \brief Matches if the cast's source expression matches the given matcher. 2576/// 2577/// Example: matches "a string" (matcher = 2578/// hasSourceExpression(constructExpr())) 2579/// \code 2580/// class URL { URL(string); }; 2581/// URL url = "a string"; 2582AST_MATCHER_P(CastExpr, hasSourceExpression, 2583 internal::Matcher<Expr>, InnerMatcher) { 2584 const Expr* const SubExpression = Node.getSubExpr(); 2585 return (SubExpression != NULL && 2586 InnerMatcher.matches(*SubExpression, Finder, Builder)); 2587} 2588 2589/// \brief Matches casts whose destination type matches a given matcher. 2590/// 2591/// (Note: Clang's AST refers to other conversions as "casts" too, and calls 2592/// actual casts "explicit" casts.) 2593AST_MATCHER_P(ExplicitCastExpr, hasDestinationType, 2594 internal::Matcher<QualType>, InnerMatcher) { 2595 const QualType NodeType = Node.getTypeAsWritten(); 2596 return InnerMatcher.matches(NodeType, Finder, Builder); 2597} 2598 2599/// \brief Matches implicit casts whose destination type matches a given 2600/// matcher. 2601/// 2602/// FIXME: Unit test this matcher 2603AST_MATCHER_P(ImplicitCastExpr, hasImplicitDestinationType, 2604 internal::Matcher<QualType>, InnerMatcher) { 2605 return InnerMatcher.matches(Node.getType(), Finder, Builder); 2606} 2607 2608/// \brief Matches the true branch expression of a conditional operator. 2609/// 2610/// Example matches a 2611/// \code 2612/// condition ? a : b 2613/// \endcode 2614AST_MATCHER_P(ConditionalOperator, hasTrueExpression, 2615 internal::Matcher<Expr>, InnerMatcher) { 2616 Expr *Expression = Node.getTrueExpr(); 2617 return (Expression != NULL && 2618 InnerMatcher.matches(*Expression, Finder, Builder)); 2619} 2620 2621/// \brief Matches the false branch expression of a conditional operator. 2622/// 2623/// Example matches b 2624/// \code 2625/// condition ? a : b 2626/// \endcode 2627AST_MATCHER_P(ConditionalOperator, hasFalseExpression, 2628 internal::Matcher<Expr>, InnerMatcher) { 2629 Expr *Expression = Node.getFalseExpr(); 2630 return (Expression != NULL && 2631 InnerMatcher.matches(*Expression, Finder, Builder)); 2632} 2633 2634/// \brief Matches if a declaration has a body attached. 2635/// 2636/// Example matches A, va, fa 2637/// \code 2638/// class A {}; 2639/// class B; // Doesn't match, as it has no body. 2640/// int va; 2641/// extern int vb; // Doesn't match, as it doesn't define the variable. 2642/// void fa() {} 2643/// void fb(); // Doesn't match, as it has no body. 2644/// \endcode 2645/// 2646/// Usable as: Matcher<TagDecl>, Matcher<VarDecl>, Matcher<FunctionDecl> 2647AST_POLYMORPHIC_MATCHER(isDefinition, AST_POLYMORPHIC_SUPPORTED_TYPES_3( 2648 TagDecl, VarDecl, FunctionDecl)) { 2649 return Node.isThisDeclarationADefinition(); 2650} 2651 2652/// \brief Matches the class declaration that the given method declaration 2653/// belongs to. 2654/// 2655/// FIXME: Generalize this for other kinds of declarations. 2656/// FIXME: What other kind of declarations would we need to generalize 2657/// this to? 2658/// 2659/// Example matches A() in the last line 2660/// (matcher = constructExpr(hasDeclaration(methodDecl( 2661/// ofClass(hasName("A")))))) 2662/// \code 2663/// class A { 2664/// public: 2665/// A(); 2666/// }; 2667/// A a = A(); 2668/// \endcode 2669AST_MATCHER_P(CXXMethodDecl, ofClass, 2670 internal::Matcher<CXXRecordDecl>, InnerMatcher) { 2671 const CXXRecordDecl *Parent = Node.getParent(); 2672 return (Parent != NULL && 2673 InnerMatcher.matches(*Parent, Finder, Builder)); 2674} 2675 2676/// \brief Matches if the given method declaration is virtual. 2677/// 2678/// Given 2679/// \code 2680/// class A { 2681/// public: 2682/// virtual void x(); 2683/// }; 2684/// \endcode 2685/// matches A::x 2686AST_MATCHER(CXXMethodDecl, isVirtual) { 2687 return Node.isVirtual(); 2688} 2689 2690/// \brief Matches if the given method declaration is const. 2691/// 2692/// Given 2693/// \code 2694/// struct A { 2695/// void foo() const; 2696/// void bar(); 2697/// }; 2698/// \endcode 2699/// 2700/// methodDecl(isConst()) matches A::foo() but not A::bar() 2701AST_MATCHER(CXXMethodDecl, isConst) { 2702 return Node.isConst(); 2703} 2704 2705/// \brief Matches if the given method declaration overrides another method. 2706/// 2707/// Given 2708/// \code 2709/// class A { 2710/// public: 2711/// virtual void x(); 2712/// }; 2713/// class B : public A { 2714/// public: 2715/// virtual void x(); 2716/// }; 2717/// \endcode 2718/// matches B::x 2719AST_MATCHER(CXXMethodDecl, isOverride) { 2720 return Node.size_overridden_methods() > 0; 2721} 2722 2723/// \brief Matches member expressions that are called with '->' as opposed 2724/// to '.'. 2725/// 2726/// Member calls on the implicit this pointer match as called with '->'. 2727/// 2728/// Given 2729/// \code 2730/// class Y { 2731/// void x() { this->x(); x(); Y y; y.x(); a; this->b; Y::b; } 2732/// int a; 2733/// static int b; 2734/// }; 2735/// \endcode 2736/// memberExpr(isArrow()) 2737/// matches this->x, x, y.x, a, this->b 2738AST_MATCHER(MemberExpr, isArrow) { 2739 return Node.isArrow(); 2740} 2741 2742/// \brief Matches QualType nodes that are of integer type. 2743/// 2744/// Given 2745/// \code 2746/// void a(int); 2747/// void b(long); 2748/// void c(double); 2749/// \endcode 2750/// functionDecl(hasAnyParameter(hasType(isInteger()))) 2751/// matches "a(int)", "b(long)", but not "c(double)". 2752AST_MATCHER(QualType, isInteger) { 2753 return Node->isIntegerType(); 2754} 2755 2756/// \brief Matches QualType nodes that are const-qualified, i.e., that 2757/// include "top-level" const. 2758/// 2759/// Given 2760/// \code 2761/// void a(int); 2762/// void b(int const); 2763/// void c(const int); 2764/// void d(const int*); 2765/// void e(int const) {}; 2766/// \endcode 2767/// functionDecl(hasAnyParameter(hasType(isConstQualified()))) 2768/// matches "void b(int const)", "void c(const int)" and 2769/// "void e(int const) {}". It does not match d as there 2770/// is no top-level const on the parameter type "const int *". 2771AST_MATCHER(QualType, isConstQualified) { 2772 return Node.isConstQualified(); 2773} 2774 2775/// \brief Matches QualType nodes that have local CV-qualifiers attached to 2776/// the node, not hidden within a typedef. 2777/// 2778/// Given 2779/// \code 2780/// typedef const int const_int; 2781/// const_int i; 2782/// int *const j; 2783/// int *volatile k; 2784/// int m; 2785/// \endcode 2786/// \c varDecl(hasType(hasLocalQualifiers())) matches only \c j and \c k. 2787/// \c i is const-qualified but the qualifier is not local. 2788AST_MATCHER(QualType, hasLocalQualifiers) { 2789 return Node.hasLocalQualifiers(); 2790} 2791 2792/// \brief Matches a member expression where the member is matched by a 2793/// given matcher. 2794/// 2795/// Given 2796/// \code 2797/// struct { int first, second; } first, second; 2798/// int i(second.first); 2799/// int j(first.second); 2800/// \endcode 2801/// memberExpr(member(hasName("first"))) 2802/// matches second.first 2803/// but not first.second (because the member name there is "second"). 2804AST_MATCHER_P(MemberExpr, member, 2805 internal::Matcher<ValueDecl>, InnerMatcher) { 2806 return InnerMatcher.matches(*Node.getMemberDecl(), Finder, Builder); 2807} 2808 2809/// \brief Matches a member expression where the object expression is 2810/// matched by a given matcher. 2811/// 2812/// Given 2813/// \code 2814/// struct X { int m; }; 2815/// void f(X x) { x.m; m; } 2816/// \endcode 2817/// memberExpr(hasObjectExpression(hasType(recordDecl(hasName("X"))))))) 2818/// matches "x.m" and "m" 2819/// with hasObjectExpression(...) 2820/// matching "x" and the implicit object expression of "m" which has type X*. 2821AST_MATCHER_P(MemberExpr, hasObjectExpression, 2822 internal::Matcher<Expr>, InnerMatcher) { 2823 return InnerMatcher.matches(*Node.getBase(), Finder, Builder); 2824} 2825 2826/// \brief Matches any using shadow declaration. 2827/// 2828/// Given 2829/// \code 2830/// namespace X { void b(); } 2831/// using X::b; 2832/// \endcode 2833/// usingDecl(hasAnyUsingShadowDecl(hasName("b")))) 2834/// matches \code using X::b \endcode 2835AST_MATCHER_P(UsingDecl, hasAnyUsingShadowDecl, 2836 internal::Matcher<UsingShadowDecl>, InnerMatcher) { 2837 return matchesFirstInPointerRange(InnerMatcher, Node.shadow_begin(), 2838 Node.shadow_end(), Finder, Builder); 2839} 2840 2841/// \brief Matches a using shadow declaration where the target declaration is 2842/// matched by the given matcher. 2843/// 2844/// Given 2845/// \code 2846/// namespace X { int a; void b(); } 2847/// using X::a; 2848/// using X::b; 2849/// \endcode 2850/// usingDecl(hasAnyUsingShadowDecl(hasTargetDecl(functionDecl()))) 2851/// matches \code using X::b \endcode 2852/// but not \code using X::a \endcode 2853AST_MATCHER_P(UsingShadowDecl, hasTargetDecl, 2854 internal::Matcher<NamedDecl>, InnerMatcher) { 2855 return InnerMatcher.matches(*Node.getTargetDecl(), Finder, Builder); 2856} 2857 2858/// \brief Matches template instantiations of function, class, or static 2859/// member variable template instantiations. 2860/// 2861/// Given 2862/// \code 2863/// template <typename T> class X {}; class A {}; X<A> x; 2864/// \endcode 2865/// or 2866/// \code 2867/// template <typename T> class X {}; class A {}; template class X<A>; 2868/// \endcode 2869/// recordDecl(hasName("::X"), isTemplateInstantiation()) 2870/// matches the template instantiation of X<A>. 2871/// 2872/// But given 2873/// \code 2874/// template <typename T> class X {}; class A {}; 2875/// template <> class X<A> {}; X<A> x; 2876/// \endcode 2877/// recordDecl(hasName("::X"), isTemplateInstantiation()) 2878/// does not match, as X<A> is an explicit template specialization. 2879/// 2880/// Usable as: Matcher<FunctionDecl>, Matcher<VarDecl>, Matcher<CXXRecordDecl> 2881AST_POLYMORPHIC_MATCHER( 2882 isTemplateInstantiation, 2883 AST_POLYMORPHIC_SUPPORTED_TYPES_3(FunctionDecl, VarDecl, CXXRecordDecl)) { 2884 return (Node.getTemplateSpecializationKind() == TSK_ImplicitInstantiation || 2885 Node.getTemplateSpecializationKind() == 2886 TSK_ExplicitInstantiationDefinition); 2887} 2888 2889/// \brief Matches explicit template specializations of function, class, or 2890/// static member variable template instantiations. 2891/// 2892/// Given 2893/// \code 2894/// template<typename T> void A(T t) { } 2895/// template<> void A(int N) { } 2896/// \endcode 2897/// functionDecl(isExplicitTemplateSpecialization()) 2898/// matches the specialization A<int>(). 2899/// 2900/// Usable as: Matcher<FunctionDecl>, Matcher<VarDecl>, Matcher<CXXRecordDecl> 2901AST_POLYMORPHIC_MATCHER( 2902 isExplicitTemplateSpecialization, 2903 AST_POLYMORPHIC_SUPPORTED_TYPES_3(FunctionDecl, VarDecl, CXXRecordDecl)) { 2904 return (Node.getTemplateSpecializationKind() == TSK_ExplicitSpecialization); 2905} 2906 2907/// \brief Matches \c TypeLocs for which the given inner 2908/// QualType-matcher matches. 2909inline internal::BindableMatcher<TypeLoc> loc( 2910 const internal::Matcher<QualType> &InnerMatcher) { 2911 return internal::BindableMatcher<TypeLoc>( 2912 new internal::TypeLocTypeMatcher(InnerMatcher)); 2913} 2914 2915/// \brief Matches builtin Types. 2916/// 2917/// Given 2918/// \code 2919/// struct A {}; 2920/// A a; 2921/// int b; 2922/// float c; 2923/// bool d; 2924/// \endcode 2925/// builtinType() 2926/// matches "int b", "float c" and "bool d" 2927AST_TYPE_MATCHER(BuiltinType, builtinType); 2928 2929/// \brief Matches all kinds of arrays. 2930/// 2931/// Given 2932/// \code 2933/// int a[] = { 2, 3 }; 2934/// int b[4]; 2935/// void f() { int c[a[0]]; } 2936/// \endcode 2937/// arrayType() 2938/// matches "int a[]", "int b[4]" and "int c[a[0]]"; 2939AST_TYPE_MATCHER(ArrayType, arrayType); 2940 2941/// \brief Matches C99 complex types. 2942/// 2943/// Given 2944/// \code 2945/// _Complex float f; 2946/// \endcode 2947/// complexType() 2948/// matches "_Complex float f" 2949AST_TYPE_MATCHER(ComplexType, complexType); 2950 2951/// \brief Matches arrays and C99 complex types that have a specific element 2952/// type. 2953/// 2954/// Given 2955/// \code 2956/// struct A {}; 2957/// A a[7]; 2958/// int b[7]; 2959/// \endcode 2960/// arrayType(hasElementType(builtinType())) 2961/// matches "int b[7]" 2962/// 2963/// Usable as: Matcher<ArrayType>, Matcher<ComplexType> 2964AST_TYPELOC_TRAVERSE_MATCHER( 2965 hasElementType, getElement, 2966 AST_POLYMORPHIC_SUPPORTED_TYPES_2(ArrayType, ComplexType)); 2967 2968/// \brief Matches C arrays with a specified constant size. 2969/// 2970/// Given 2971/// \code 2972/// void() { 2973/// int a[2]; 2974/// int b[] = { 2, 3 }; 2975/// int c[b[0]]; 2976/// } 2977/// \endcode 2978/// constantArrayType() 2979/// matches "int a[2]" 2980AST_TYPE_MATCHER(ConstantArrayType, constantArrayType); 2981 2982/// \brief Matches \c ConstantArrayType nodes that have the specified size. 2983/// 2984/// Given 2985/// \code 2986/// int a[42]; 2987/// int b[2 * 21]; 2988/// int c[41], d[43]; 2989/// \endcode 2990/// constantArrayType(hasSize(42)) 2991/// matches "int a[42]" and "int b[2 * 21]" 2992AST_MATCHER_P(ConstantArrayType, hasSize, unsigned, N) { 2993 return Node.getSize() == N; 2994} 2995 2996/// \brief Matches C++ arrays whose size is a value-dependent expression. 2997/// 2998/// Given 2999/// \code 3000/// template<typename T, int Size> 3001/// class array { 3002/// T data[Size]; 3003/// }; 3004/// \endcode 3005/// dependentSizedArrayType 3006/// matches "T data[Size]" 3007AST_TYPE_MATCHER(DependentSizedArrayType, dependentSizedArrayType); 3008 3009/// \brief Matches C arrays with unspecified size. 3010/// 3011/// Given 3012/// \code 3013/// int a[] = { 2, 3 }; 3014/// int b[42]; 3015/// void f(int c[]) { int d[a[0]]; }; 3016/// \endcode 3017/// incompleteArrayType() 3018/// matches "int a[]" and "int c[]" 3019AST_TYPE_MATCHER(IncompleteArrayType, incompleteArrayType); 3020 3021/// \brief Matches C arrays with a specified size that is not an 3022/// integer-constant-expression. 3023/// 3024/// Given 3025/// \code 3026/// void f() { 3027/// int a[] = { 2, 3 } 3028/// int b[42]; 3029/// int c[a[0]]; 3030/// \endcode 3031/// variableArrayType() 3032/// matches "int c[a[0]]" 3033AST_TYPE_MATCHER(VariableArrayType, variableArrayType); 3034 3035/// \brief Matches \c VariableArrayType nodes that have a specific size 3036/// expression. 3037/// 3038/// Given 3039/// \code 3040/// void f(int b) { 3041/// int a[b]; 3042/// } 3043/// \endcode 3044/// variableArrayType(hasSizeExpr(ignoringImpCasts(declRefExpr(to( 3045/// varDecl(hasName("b"))))))) 3046/// matches "int a[b]" 3047AST_MATCHER_P(VariableArrayType, hasSizeExpr, 3048 internal::Matcher<Expr>, InnerMatcher) { 3049 return InnerMatcher.matches(*Node.getSizeExpr(), Finder, Builder); 3050} 3051 3052/// \brief Matches atomic types. 3053/// 3054/// Given 3055/// \code 3056/// _Atomic(int) i; 3057/// \endcode 3058/// atomicType() 3059/// matches "_Atomic(int) i" 3060AST_TYPE_MATCHER(AtomicType, atomicType); 3061 3062/// \brief Matches atomic types with a specific value type. 3063/// 3064/// Given 3065/// \code 3066/// _Atomic(int) i; 3067/// _Atomic(float) f; 3068/// \endcode 3069/// atomicType(hasValueType(isInteger())) 3070/// matches "_Atomic(int) i" 3071/// 3072/// Usable as: Matcher<AtomicType> 3073AST_TYPELOC_TRAVERSE_MATCHER(hasValueType, getValue, 3074 AST_POLYMORPHIC_SUPPORTED_TYPES_1(AtomicType)); 3075 3076/// \brief Matches types nodes representing C++11 auto types. 3077/// 3078/// Given: 3079/// \code 3080/// auto n = 4; 3081/// int v[] = { 2, 3 } 3082/// for (auto i : v) { } 3083/// \endcode 3084/// autoType() 3085/// matches "auto n" and "auto i" 3086AST_TYPE_MATCHER(AutoType, autoType); 3087 3088/// \brief Matches \c AutoType nodes where the deduced type is a specific type. 3089/// 3090/// Note: There is no \c TypeLoc for the deduced type and thus no 3091/// \c getDeducedLoc() matcher. 3092/// 3093/// Given 3094/// \code 3095/// auto a = 1; 3096/// auto b = 2.0; 3097/// \endcode 3098/// autoType(hasDeducedType(isInteger())) 3099/// matches "auto a" 3100/// 3101/// Usable as: Matcher<AutoType> 3102AST_TYPE_TRAVERSE_MATCHER(hasDeducedType, getDeducedType, 3103 AST_POLYMORPHIC_SUPPORTED_TYPES_1(AutoType)); 3104 3105/// \brief Matches \c FunctionType nodes. 3106/// 3107/// Given 3108/// \code 3109/// int (*f)(int); 3110/// void g(); 3111/// \endcode 3112/// functionType() 3113/// matches "int (*f)(int)" and the type of "g". 3114AST_TYPE_MATCHER(FunctionType, functionType); 3115 3116/// \brief Matches \c ParenType nodes. 3117/// 3118/// Given 3119/// \code 3120/// int (*ptr_to_array)[4]; 3121/// int *array_of_ptrs[4]; 3122/// \endcode 3123/// 3124/// \c varDecl(hasType(pointsTo(parenType()))) matches \c ptr_to_array but not 3125/// \c array_of_ptrs. 3126AST_TYPE_MATCHER(ParenType, parenType); 3127 3128/// \brief Matches \c ParenType nodes where the inner type is a specific type. 3129/// 3130/// Given 3131/// \code 3132/// int (*ptr_to_array)[4]; 3133/// int (*ptr_to_func)(int); 3134/// \endcode 3135/// 3136/// \c varDecl(hasType(pointsTo(parenType(innerType(functionType()))))) matches 3137/// \c ptr_to_func but not \c ptr_to_array. 3138/// 3139/// Usable as: Matcher<ParenType> 3140AST_TYPE_TRAVERSE_MATCHER(innerType, getInnerType, 3141 AST_POLYMORPHIC_SUPPORTED_TYPES_1(ParenType)); 3142 3143/// \brief Matches block pointer types, i.e. types syntactically represented as 3144/// "void (^)(int)". 3145/// 3146/// The \c pointee is always required to be a \c FunctionType. 3147AST_TYPE_MATCHER(BlockPointerType, blockPointerType); 3148 3149/// \brief Matches member pointer types. 3150/// Given 3151/// \code 3152/// struct A { int i; } 3153/// A::* ptr = A::i; 3154/// \endcode 3155/// memberPointerType() 3156/// matches "A::* ptr" 3157AST_TYPE_MATCHER(MemberPointerType, memberPointerType); 3158 3159/// \brief Matches pointer types. 3160/// 3161/// Given 3162/// \code 3163/// int *a; 3164/// int &b = *a; 3165/// int c = 5; 3166/// \endcode 3167/// pointerType() 3168/// matches "int *a" 3169AST_TYPE_MATCHER(PointerType, pointerType); 3170 3171/// \brief Matches both lvalue and rvalue reference types. 3172/// 3173/// Given 3174/// \code 3175/// int *a; 3176/// int &b = *a; 3177/// int &&c = 1; 3178/// auto &d = b; 3179/// auto &&e = c; 3180/// auto &&f = 2; 3181/// int g = 5; 3182/// \endcode 3183/// 3184/// \c referenceType() matches the types of \c b, \c c, \c d, \c e, and \c f. 3185AST_TYPE_MATCHER(ReferenceType, referenceType); 3186 3187/// \brief Matches lvalue reference types. 3188/// 3189/// Given: 3190/// \code 3191/// int *a; 3192/// int &b = *a; 3193/// int &&c = 1; 3194/// auto &d = b; 3195/// auto &&e = c; 3196/// auto &&f = 2; 3197/// int g = 5; 3198/// \endcode 3199/// 3200/// \c lValueReferenceType() matches the types of \c b, \c d, and \c e. \c e is 3201/// matched since the type is deduced as int& by reference collapsing rules. 3202AST_TYPE_MATCHER(LValueReferenceType, lValueReferenceType); 3203 3204/// \brief Matches rvalue reference types. 3205/// 3206/// Given: 3207/// \code 3208/// int *a; 3209/// int &b = *a; 3210/// int &&c = 1; 3211/// auto &d = b; 3212/// auto &&e = c; 3213/// auto &&f = 2; 3214/// int g = 5; 3215/// \endcode 3216/// 3217/// \c rValueReferenceType() matches the types of \c c and \c f. \c e is not 3218/// matched as it is deduced to int& by reference collapsing rules. 3219AST_TYPE_MATCHER(RValueReferenceType, rValueReferenceType); 3220 3221/// \brief Narrows PointerType (and similar) matchers to those where the 3222/// \c pointee matches a given matcher. 3223/// 3224/// Given 3225/// \code 3226/// int *a; 3227/// int const *b; 3228/// float const *f; 3229/// \endcode 3230/// pointerType(pointee(isConstQualified(), isInteger())) 3231/// matches "int const *b" 3232/// 3233/// Usable as: Matcher<BlockPointerType>, Matcher<MemberPointerType>, 3234/// Matcher<PointerType>, Matcher<ReferenceType> 3235AST_TYPELOC_TRAVERSE_MATCHER( 3236 pointee, getPointee, 3237 AST_POLYMORPHIC_SUPPORTED_TYPES_4(BlockPointerType, MemberPointerType, 3238 PointerType, ReferenceType)); 3239 3240/// \brief Matches typedef types. 3241/// 3242/// Given 3243/// \code 3244/// typedef int X; 3245/// \endcode 3246/// typedefType() 3247/// matches "typedef int X" 3248AST_TYPE_MATCHER(TypedefType, typedefType); 3249 3250/// \brief Matches template specialization types. 3251/// 3252/// Given 3253/// \code 3254/// template <typename T> 3255/// class C { }; 3256/// 3257/// template class C<int>; // A 3258/// C<char> var; // B 3259/// \code 3260/// 3261/// \c templateSpecializationType() matches the type of the explicit 3262/// instantiation in \c A and the type of the variable declaration in \c B. 3263AST_TYPE_MATCHER(TemplateSpecializationType, templateSpecializationType); 3264 3265/// \brief Matches types nodes representing unary type transformations. 3266/// 3267/// Given: 3268/// \code 3269/// typedef __underlying_type(T) type; 3270/// \endcode 3271/// unaryTransformType() 3272/// matches "__underlying_type(T)" 3273AST_TYPE_MATCHER(UnaryTransformType, unaryTransformType); 3274 3275/// \brief Matches record types (e.g. structs, classes). 3276/// 3277/// Given 3278/// \code 3279/// class C {}; 3280/// struct S {}; 3281/// 3282/// C c; 3283/// S s; 3284/// \code 3285/// 3286/// \c recordType() matches the type of the variable declarations of both \c c 3287/// and \c s. 3288AST_TYPE_MATCHER(RecordType, recordType); 3289 3290/// \brief Matches types specified with an elaborated type keyword or with a 3291/// qualified name. 3292/// 3293/// Given 3294/// \code 3295/// namespace N { 3296/// namespace M { 3297/// class D {}; 3298/// } 3299/// } 3300/// class C {}; 3301/// 3302/// class C c; 3303/// N::M::D d; 3304/// \code 3305/// 3306/// \c elaboratedType() matches the type of the variable declarations of both 3307/// \c c and \c d. 3308AST_TYPE_MATCHER(ElaboratedType, elaboratedType); 3309 3310/// \brief Matches ElaboratedTypes whose qualifier, a NestedNameSpecifier, 3311/// matches \c InnerMatcher if the qualifier exists. 3312/// 3313/// Given 3314/// \code 3315/// namespace N { 3316/// namespace M { 3317/// class D {}; 3318/// } 3319/// } 3320/// N::M::D d; 3321/// \code 3322/// 3323/// \c elaboratedType(hasQualifier(hasPrefix(specifiesNamespace(hasName("N")))) 3324/// matches the type of the variable declaration of \c d. 3325AST_MATCHER_P(ElaboratedType, hasQualifier, 3326 internal::Matcher<NestedNameSpecifier>, InnerMatcher) { 3327 if (const NestedNameSpecifier *Qualifier = Node.getQualifier()) 3328 return InnerMatcher.matches(*Qualifier, Finder, Builder); 3329 3330 return false; 3331} 3332 3333/// \brief Matches ElaboratedTypes whose named type matches \c InnerMatcher. 3334/// 3335/// Given 3336/// \code 3337/// namespace N { 3338/// namespace M { 3339/// class D {}; 3340/// } 3341/// } 3342/// N::M::D d; 3343/// \code 3344/// 3345/// \c elaboratedType(namesType(recordType( 3346/// hasDeclaration(namedDecl(hasName("D")))))) matches the type of the variable 3347/// declaration of \c d. 3348AST_MATCHER_P(ElaboratedType, namesType, internal::Matcher<QualType>, 3349 InnerMatcher) { 3350 return InnerMatcher.matches(Node.getNamedType(), Finder, Builder); 3351} 3352 3353/// \brief Matches declarations whose declaration context, interpreted as a 3354/// Decl, matches \c InnerMatcher. 3355/// 3356/// Given 3357/// \code 3358/// namespace N { 3359/// namespace M { 3360/// class D {}; 3361/// } 3362/// } 3363/// \code 3364/// 3365/// \c recordDecl(hasDeclContext(namedDecl(hasName("M")))) matches the 3366/// declaration of \c class \c D. 3367AST_MATCHER_P(Decl, hasDeclContext, internal::Matcher<Decl>, InnerMatcher) { 3368 return InnerMatcher.matches(*Decl::castFromDeclContext(Node.getDeclContext()), 3369 Finder, Builder); 3370} 3371 3372/// \brief Matches nested name specifiers. 3373/// 3374/// Given 3375/// \code 3376/// namespace ns { 3377/// struct A { static void f(); }; 3378/// void A::f() {} 3379/// void g() { A::f(); } 3380/// } 3381/// ns::A a; 3382/// \endcode 3383/// nestedNameSpecifier() 3384/// matches "ns::" and both "A::" 3385const internal::VariadicAllOfMatcher<NestedNameSpecifier> nestedNameSpecifier; 3386 3387/// \brief Same as \c nestedNameSpecifier but matches \c NestedNameSpecifierLoc. 3388const internal::VariadicAllOfMatcher< 3389 NestedNameSpecifierLoc> nestedNameSpecifierLoc; 3390 3391/// \brief Matches \c NestedNameSpecifierLocs for which the given inner 3392/// NestedNameSpecifier-matcher matches. 3393inline internal::BindableMatcher<NestedNameSpecifierLoc> loc( 3394 const internal::Matcher<NestedNameSpecifier> &InnerMatcher) { 3395 return internal::BindableMatcher<NestedNameSpecifierLoc>( 3396 new internal::LocMatcher<NestedNameSpecifierLoc, NestedNameSpecifier>( 3397 InnerMatcher)); 3398} 3399 3400/// \brief Matches nested name specifiers that specify a type matching the 3401/// given \c QualType matcher without qualifiers. 3402/// 3403/// Given 3404/// \code 3405/// struct A { struct B { struct C {}; }; }; 3406/// A::B::C c; 3407/// \endcode 3408/// nestedNameSpecifier(specifiesType(hasDeclaration(recordDecl(hasName("A"))))) 3409/// matches "A::" 3410AST_MATCHER_P(NestedNameSpecifier, specifiesType, 3411 internal::Matcher<QualType>, InnerMatcher) { 3412 if (Node.getAsType() == NULL) 3413 return false; 3414 return InnerMatcher.matches(QualType(Node.getAsType(), 0), Finder, Builder); 3415} 3416 3417/// \brief Matches nested name specifier locs that specify a type matching the 3418/// given \c TypeLoc. 3419/// 3420/// Given 3421/// \code 3422/// struct A { struct B { struct C {}; }; }; 3423/// A::B::C c; 3424/// \endcode 3425/// nestedNameSpecifierLoc(specifiesTypeLoc(loc(type( 3426/// hasDeclaration(recordDecl(hasName("A"))))))) 3427/// matches "A::" 3428AST_MATCHER_P(NestedNameSpecifierLoc, specifiesTypeLoc, 3429 internal::Matcher<TypeLoc>, InnerMatcher) { 3430 return InnerMatcher.matches(Node.getTypeLoc(), Finder, Builder); 3431} 3432 3433/// \brief Matches on the prefix of a \c NestedNameSpecifier. 3434/// 3435/// Given 3436/// \code 3437/// struct A { struct B { struct C {}; }; }; 3438/// A::B::C c; 3439/// \endcode 3440/// nestedNameSpecifier(hasPrefix(specifiesType(asString("struct A")))) and 3441/// matches "A::" 3442AST_MATCHER_P_OVERLOAD(NestedNameSpecifier, hasPrefix, 3443 internal::Matcher<NestedNameSpecifier>, InnerMatcher, 3444 0) { 3445 NestedNameSpecifier *NextNode = Node.getPrefix(); 3446 if (NextNode == NULL) 3447 return false; 3448 return InnerMatcher.matches(*NextNode, Finder, Builder); 3449} 3450 3451/// \brief Matches on the prefix of a \c NestedNameSpecifierLoc. 3452/// 3453/// Given 3454/// \code 3455/// struct A { struct B { struct C {}; }; }; 3456/// A::B::C c; 3457/// \endcode 3458/// nestedNameSpecifierLoc(hasPrefix(loc(specifiesType(asString("struct A"))))) 3459/// matches "A::" 3460AST_MATCHER_P_OVERLOAD(NestedNameSpecifierLoc, hasPrefix, 3461 internal::Matcher<NestedNameSpecifierLoc>, InnerMatcher, 3462 1) { 3463 NestedNameSpecifierLoc NextNode = Node.getPrefix(); 3464 if (!NextNode) 3465 return false; 3466 return InnerMatcher.matches(NextNode, Finder, Builder); 3467} 3468 3469/// \brief Matches nested name specifiers that specify a namespace matching the 3470/// given namespace matcher. 3471/// 3472/// Given 3473/// \code 3474/// namespace ns { struct A {}; } 3475/// ns::A a; 3476/// \endcode 3477/// nestedNameSpecifier(specifiesNamespace(hasName("ns"))) 3478/// matches "ns::" 3479AST_MATCHER_P(NestedNameSpecifier, specifiesNamespace, 3480 internal::Matcher<NamespaceDecl>, InnerMatcher) { 3481 if (Node.getAsNamespace() == NULL) 3482 return false; 3483 return InnerMatcher.matches(*Node.getAsNamespace(), Finder, Builder); 3484} 3485 3486/// \brief Overloads for the \c equalsNode matcher. 3487/// FIXME: Implement for other node types. 3488/// @{ 3489 3490/// \brief Matches if a node equals another node. 3491/// 3492/// \c Decl has pointer identity in the AST. 3493AST_MATCHER_P_OVERLOAD(Decl, equalsNode, Decl*, Other, 0) { 3494 return &Node == Other; 3495} 3496/// \brief Matches if a node equals another node. 3497/// 3498/// \c Stmt has pointer identity in the AST. 3499/// 3500AST_MATCHER_P_OVERLOAD(Stmt, equalsNode, Stmt*, Other, 1) { 3501 return &Node == Other; 3502} 3503 3504/// @} 3505 3506/// \brief Matches each case or default statement belonging to the given switch 3507/// statement. This matcher may produce multiple matches. 3508/// 3509/// Given 3510/// \code 3511/// switch (1) { case 1: case 2: default: switch (2) { case 3: case 4: ; } } 3512/// \endcode 3513/// switchStmt(forEachSwitchCase(caseStmt().bind("c"))).bind("s") 3514/// matches four times, with "c" binding each of "case 1:", "case 2:", 3515/// "case 3:" and "case 4:", and "s" respectively binding "switch (1)", 3516/// "switch (1)", "switch (2)" and "switch (2)". 3517AST_MATCHER_P(SwitchStmt, forEachSwitchCase, internal::Matcher<SwitchCase>, 3518 InnerMatcher) { 3519 BoundNodesTreeBuilder Result; 3520 // FIXME: getSwitchCaseList() does not necessarily guarantee a stable 3521 // iteration order. We should use the more general iterating matchers once 3522 // they are capable of expressing this matcher (for example, it should ignore 3523 // case statements belonging to nested switch statements). 3524 bool Matched = false; 3525 for (const SwitchCase *SC = Node.getSwitchCaseList(); SC; 3526 SC = SC->getNextSwitchCase()) { 3527 BoundNodesTreeBuilder CaseBuilder(*Builder); 3528 bool CaseMatched = InnerMatcher.matches(*SC, Finder, &CaseBuilder); 3529 if (CaseMatched) { 3530 Matched = true; 3531 Result.addMatch(CaseBuilder); 3532 } 3533 } 3534 *Builder = Result; 3535 return Matched; 3536} 3537 3538/// \brief Matches each constructor initializer in a constructor definition. 3539/// 3540/// Given 3541/// \code 3542/// class A { A() : i(42), j(42) {} int i; int j; }; 3543/// \endcode 3544/// constructorDecl(forEachConstructorInitializer(forField(decl().bind("x")))) 3545/// will trigger two matches, binding for 'i' and 'j' respectively. 3546AST_MATCHER_P(CXXConstructorDecl, forEachConstructorInitializer, 3547 internal::Matcher<CXXCtorInitializer>, InnerMatcher) { 3548 BoundNodesTreeBuilder Result; 3549 bool Matched = false; 3550 for (CXXConstructorDecl::init_const_iterator I = Node.init_begin(), 3551 E = Node.init_end(); 3552 I != E; ++I) { 3553 BoundNodesTreeBuilder InitBuilder(*Builder); 3554 if (InnerMatcher.matches(**I, Finder, &InitBuilder)) { 3555 Matched = true; 3556 Result.addMatch(InitBuilder); 3557 } 3558 } 3559 *Builder = Result; 3560 return Matched; 3561} 3562 3563/// \brief If the given case statement does not use the GNU case range 3564/// extension, matches the constant given in the statement. 3565/// 3566/// Given 3567/// \code 3568/// switch (1) { case 1: case 1+1: case 3 ... 4: ; } 3569/// \endcode 3570/// caseStmt(hasCaseConstant(integerLiteral())) 3571/// matches "case 1:" 3572AST_MATCHER_P(CaseStmt, hasCaseConstant, internal::Matcher<Expr>, 3573 InnerMatcher) { 3574 if (Node.getRHS()) 3575 return false; 3576 3577 return InnerMatcher.matches(*Node.getLHS(), Finder, Builder); 3578} 3579 3580} // end namespace ast_matchers 3581} // end namespace clang 3582 3583#endif // LLVM_CLANG_AST_MATCHERS_AST_MATCHERS_H 3584