ExprObjC.h revision f8730d7c313c421d5d7a2b9d97541fc89d5a52d4
1//===--- ExprObjC.h - Classes for representing ObjC expressions -*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the ExprObjC interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_EXPROBJC_H 15#define LLVM_CLANG_AST_EXPROBJC_H 16 17#include "clang/AST/Expr.h" 18#include "clang/Basic/IdentifierTable.h" 19 20namespace clang { 21 class IdentifierInfo; 22 class ASTContext; 23 class ObjCMethodDecl; 24 class ObjCPropertyDecl; 25 26/// ObjCStringLiteral, used for Objective-C string literals 27/// i.e. @"foo". 28class ObjCStringLiteral : public Expr { 29 Stmt *String; 30 SourceLocation AtLoc; 31public: 32 ObjCStringLiteral(StringLiteral *SL, QualType T, SourceLocation L) 33 : Expr(ObjCStringLiteralClass, T, false, false), String(SL), AtLoc(L) {} 34 explicit ObjCStringLiteral(EmptyShell Empty) 35 : Expr(ObjCStringLiteralClass, Empty) {} 36 37 StringLiteral *getString() { return cast<StringLiteral>(String); } 38 const StringLiteral *getString() const { return cast<StringLiteral>(String); } 39 void setString(StringLiteral *S) { String = S; } 40 41 SourceLocation getAtLoc() const { return AtLoc; } 42 void setAtLoc(SourceLocation L) { AtLoc = L; } 43 44 virtual SourceRange getSourceRange() const { 45 return SourceRange(AtLoc, String->getLocEnd()); 46 } 47 48 static bool classof(const Stmt *T) { 49 return T->getStmtClass() == ObjCStringLiteralClass; 50 } 51 static bool classof(const ObjCStringLiteral *) { return true; } 52 53 // Iterators 54 virtual child_iterator child_begin(); 55 virtual child_iterator child_end(); 56}; 57 58/// ObjCEncodeExpr, used for @encode in Objective-C. @encode has the same type 59/// and behavior as StringLiteral except that the string initializer is obtained 60/// from ASTContext with the encoding type as an argument. 61class ObjCEncodeExpr : public Expr { 62 TypeSourceInfo *EncodedType; 63 SourceLocation AtLoc, RParenLoc; 64public: 65 ObjCEncodeExpr(QualType T, TypeSourceInfo *EncodedType, 66 SourceLocation at, SourceLocation rp) 67 : Expr(ObjCEncodeExprClass, T, EncodedType->getType()->isDependentType(), 68 EncodedType->getType()->isDependentType()), 69 EncodedType(EncodedType), AtLoc(at), RParenLoc(rp) {} 70 71 explicit ObjCEncodeExpr(EmptyShell Empty) : Expr(ObjCEncodeExprClass, Empty){} 72 73 74 SourceLocation getAtLoc() const { return AtLoc; } 75 void setAtLoc(SourceLocation L) { AtLoc = L; } 76 SourceLocation getRParenLoc() const { return RParenLoc; } 77 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 78 79 QualType getEncodedType() const { return EncodedType->getType(); } 80 81 TypeSourceInfo *getEncodedTypeSourceInfo() const { return EncodedType; } 82 void setEncodedTypeSourceInfo(TypeSourceInfo *EncType) { 83 EncodedType = EncType; 84 } 85 86 virtual SourceRange getSourceRange() const { 87 return SourceRange(AtLoc, RParenLoc); 88 } 89 90 static bool classof(const Stmt *T) { 91 return T->getStmtClass() == ObjCEncodeExprClass; 92 } 93 static bool classof(const ObjCEncodeExpr *) { return true; } 94 95 // Iterators 96 virtual child_iterator child_begin(); 97 virtual child_iterator child_end(); 98}; 99 100/// ObjCSelectorExpr used for @selector in Objective-C. 101class ObjCSelectorExpr : public Expr { 102 Selector SelName; 103 SourceLocation AtLoc, RParenLoc; 104public: 105 ObjCSelectorExpr(QualType T, Selector selInfo, 106 SourceLocation at, SourceLocation rp) 107 : Expr(ObjCSelectorExprClass, T, false, false), SelName(selInfo), AtLoc(at), 108 RParenLoc(rp){} 109 explicit ObjCSelectorExpr(EmptyShell Empty) 110 : Expr(ObjCSelectorExprClass, Empty) {} 111 112 Selector getSelector() const { return SelName; } 113 void setSelector(Selector S) { SelName = S; } 114 115 SourceLocation getAtLoc() const { return AtLoc; } 116 SourceLocation getRParenLoc() const { return RParenLoc; } 117 void setAtLoc(SourceLocation L) { AtLoc = L; } 118 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 119 120 virtual SourceRange getSourceRange() const { 121 return SourceRange(AtLoc, RParenLoc); 122 } 123 124 /// getNumArgs - Return the number of actual arguments to this call. 125 unsigned getNumArgs() const { return SelName.getNumArgs(); } 126 127 static bool classof(const Stmt *T) { 128 return T->getStmtClass() == ObjCSelectorExprClass; 129 } 130 static bool classof(const ObjCSelectorExpr *) { return true; } 131 132 // Iterators 133 virtual child_iterator child_begin(); 134 virtual child_iterator child_end(); 135}; 136 137/// ObjCProtocolExpr used for protocol expression in Objective-C. This is used 138/// as: @protocol(foo), as in: 139/// obj conformsToProtocol:@protocol(foo)] 140/// The return type is "Protocol*". 141class ObjCProtocolExpr : public Expr { 142 ObjCProtocolDecl *TheProtocol; 143 SourceLocation AtLoc, RParenLoc; 144public: 145 ObjCProtocolExpr(QualType T, ObjCProtocolDecl *protocol, 146 SourceLocation at, SourceLocation rp) 147 : Expr(ObjCProtocolExprClass, T, false, false), TheProtocol(protocol), 148 AtLoc(at), RParenLoc(rp) {} 149 explicit ObjCProtocolExpr(EmptyShell Empty) 150 : Expr(ObjCProtocolExprClass, Empty) {} 151 152 ObjCProtocolDecl *getProtocol() const { return TheProtocol; } 153 void setProtocol(ObjCProtocolDecl *P) { TheProtocol = P; } 154 155 SourceLocation getAtLoc() const { return AtLoc; } 156 SourceLocation getRParenLoc() const { return RParenLoc; } 157 void setAtLoc(SourceLocation L) { AtLoc = L; } 158 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 159 160 virtual SourceRange getSourceRange() const { 161 return SourceRange(AtLoc, RParenLoc); 162 } 163 164 static bool classof(const Stmt *T) { 165 return T->getStmtClass() == ObjCProtocolExprClass; 166 } 167 static bool classof(const ObjCProtocolExpr *) { return true; } 168 169 // Iterators 170 virtual child_iterator child_begin(); 171 virtual child_iterator child_end(); 172}; 173 174/// ObjCIvarRefExpr - A reference to an ObjC instance variable. 175class ObjCIvarRefExpr : public Expr { 176 class ObjCIvarDecl *D; 177 SourceLocation Loc; 178 Stmt *Base; 179 bool IsArrow:1; // True if this is "X->F", false if this is "X.F". 180 bool IsFreeIvar:1; // True if ivar reference has no base (self assumed). 181 182public: 183 ObjCIvarRefExpr(ObjCIvarDecl *d, 184 QualType t, SourceLocation l, Expr *base, 185 bool arrow = false, bool freeIvar = false) : 186 Expr(ObjCIvarRefExprClass, t, /*TypeDependent=*/false, 187 base->isValueDependent()), D(d), 188 Loc(l), Base(base), IsArrow(arrow), 189 IsFreeIvar(freeIvar) {} 190 191 explicit ObjCIvarRefExpr(EmptyShell Empty) 192 : Expr(ObjCIvarRefExprClass, Empty) {} 193 194 ObjCIvarDecl *getDecl() { return D; } 195 const ObjCIvarDecl *getDecl() const { return D; } 196 void setDecl(ObjCIvarDecl *d) { D = d; } 197 198 const Expr *getBase() const { return cast<Expr>(Base); } 199 Expr *getBase() { return cast<Expr>(Base); } 200 void setBase(Expr * base) { Base = base; } 201 202 bool isArrow() const { return IsArrow; } 203 bool isFreeIvar() const { return IsFreeIvar; } 204 void setIsArrow(bool A) { IsArrow = A; } 205 void setIsFreeIvar(bool A) { IsFreeIvar = A; } 206 207 SourceLocation getLocation() const { return Loc; } 208 void setLocation(SourceLocation L) { Loc = L; } 209 210 virtual SourceRange getSourceRange() const { 211 return isFreeIvar() ? SourceRange(Loc) 212 : SourceRange(getBase()->getLocStart(), Loc); 213 } 214 215 static bool classof(const Stmt *T) { 216 return T->getStmtClass() == ObjCIvarRefExprClass; 217 } 218 static bool classof(const ObjCIvarRefExpr *) { return true; } 219 220 // Iterators 221 virtual child_iterator child_begin(); 222 virtual child_iterator child_end(); 223}; 224 225/// ObjCPropertyRefExpr - A dot-syntax expression to access an ObjC 226/// property. 227/// 228class ObjCPropertyRefExpr : public Expr { 229private: 230 ObjCPropertyDecl *AsProperty; 231 SourceLocation IdLoc; 232 Stmt *Base; 233public: 234 ObjCPropertyRefExpr(ObjCPropertyDecl *PD, QualType t, 235 SourceLocation l, Expr *base) 236 : Expr(ObjCPropertyRefExprClass, t, /*TypeDependent=*/false, 237 base->isValueDependent()), 238 AsProperty(PD), IdLoc(l), Base(base) { 239 } 240 241 explicit ObjCPropertyRefExpr(EmptyShell Empty) 242 : Expr(ObjCPropertyRefExprClass, Empty) {} 243 244 ObjCPropertyDecl *getProperty() const { return AsProperty; } 245 246 const Expr *getBase() const { return cast<Expr>(Base); } 247 Expr *getBase() { return cast<Expr>(Base); } 248 249 SourceLocation getLocation() const { return IdLoc; } 250 251 virtual SourceRange getSourceRange() const { 252 return SourceRange(getBase()->getLocStart(), IdLoc); 253 } 254 255 static bool classof(const Stmt *T) { 256 return T->getStmtClass() == ObjCPropertyRefExprClass; 257 } 258 static bool classof(const ObjCPropertyRefExpr *) { return true; } 259 260 // Iterators 261 virtual child_iterator child_begin(); 262 virtual child_iterator child_end(); 263private: 264 friend class ASTStmtReader; 265 void setProperty(ObjCPropertyDecl *D) { AsProperty = D; } 266 void setBase(Expr *base) { Base = base; } 267 void setLocation(SourceLocation L) { IdLoc = L; } 268}; 269 270/// ObjCImplicitSetterGetterRefExpr - A dot-syntax expression to access two 271/// methods; one to set a value to an 'ivar' (Setter) and the other to access 272/// an 'ivar' (Setter). 273/// An example for use of this AST is: 274/// @code 275/// @interface Test { } 276/// - (Test *)crash; 277/// - (void)setCrash: (Test*)value; 278/// @end 279/// void foo(Test *p1, Test *p2) 280/// { 281/// p2.crash = p1.crash; // Uses ObjCImplicitSetterGetterRefExpr AST 282/// } 283/// @endcode 284class ObjCImplicitSetterGetterRefExpr : public Expr { 285 /// Setter - Setter method user declared for setting its 'ivar' to a value 286 ObjCMethodDecl *Setter; 287 /// Getter - Getter method user declared for accessing 'ivar' it controls. 288 ObjCMethodDecl *Getter; 289 /// Location of the member in the dot syntax notation. This is location 290 /// of the getter method. 291 SourceLocation MemberLoc; 292 // FIXME: Swizzle these into a single pointer. 293 Stmt *Base; 294 ObjCInterfaceDecl *InterfaceDecl; 295 /// Location of the receiver class in the dot syntax notation 296 /// used to call a class method setter/getter. 297 SourceLocation ClassLoc; 298 299public: 300 ObjCImplicitSetterGetterRefExpr(ObjCMethodDecl *getter, 301 QualType t, 302 ObjCMethodDecl *setter, 303 SourceLocation l, Expr *base) 304 : Expr(ObjCImplicitSetterGetterRefExprClass, t, /*TypeDependent=*/false, 305 base->isValueDependent()), 306 Setter(setter), Getter(getter), MemberLoc(l), Base(base), 307 InterfaceDecl(0), ClassLoc(SourceLocation()) { 308 } 309 ObjCImplicitSetterGetterRefExpr(ObjCMethodDecl *getter, 310 QualType t, 311 ObjCMethodDecl *setter, 312 SourceLocation l, ObjCInterfaceDecl *C, SourceLocation CL) 313 : Expr(ObjCImplicitSetterGetterRefExprClass, t, false, false), 314 Setter(setter), Getter(getter), MemberLoc(l), Base(0), InterfaceDecl(C), 315 ClassLoc(CL) { 316 } 317 explicit ObjCImplicitSetterGetterRefExpr(EmptyShell Empty) 318 : Expr(ObjCImplicitSetterGetterRefExprClass, Empty){} 319 320 ObjCMethodDecl *getGetterMethod() const { return Getter; } 321 ObjCMethodDecl *getSetterMethod() const { return Setter; } 322 ObjCInterfaceDecl *getInterfaceDecl() const { return InterfaceDecl; } 323 void setGetterMethod(ObjCMethodDecl *D) { Getter = D; } 324 void setSetterMethod(ObjCMethodDecl *D) { Setter = D; } 325 void setInterfaceDecl(ObjCInterfaceDecl *D) { InterfaceDecl = D; } 326 327 virtual SourceRange getSourceRange() const { 328 if (Base) 329 return SourceRange(getBase()->getLocStart(), MemberLoc); 330 return SourceRange(ClassLoc, MemberLoc); 331 } 332 const Expr *getBase() const { return cast_or_null<Expr>(Base); } 333 Expr *getBase() { return cast_or_null<Expr>(Base); } 334 void setBase(Expr *base) { Base = base; } 335 336 SourceLocation getLocation() const { return MemberLoc; } 337 void setLocation(SourceLocation L) { MemberLoc = L; } 338 SourceLocation getClassLoc() const { return ClassLoc; } 339 void setClassLoc(SourceLocation L) { ClassLoc = L; } 340 341 static bool classof(const Stmt *T) { 342 return T->getStmtClass() == ObjCImplicitSetterGetterRefExprClass; 343 } 344 static bool classof(const ObjCImplicitSetterGetterRefExpr *) { return true; } 345 346 // Iterators 347 virtual child_iterator child_begin(); 348 virtual child_iterator child_end(); 349}; 350 351/// \brief An expression that sends a message to the given Objective-C 352/// object or class. 353/// 354/// The following contains two message send expressions: 355/// 356/// \code 357/// [[NSString alloc] initWithString:@"Hello"] 358/// \endcode 359/// 360/// The innermost message send invokes the "alloc" class method on the 361/// NSString class, while the outermost message send invokes the 362/// "initWithString" instance method on the object returned from 363/// NSString's "alloc". In all, an Objective-C message send can take 364/// on four different (although related) forms: 365/// 366/// 1. Send to an object instance. 367/// 2. Send to a class. 368/// 3. Send to the superclass instance of the current class. 369/// 4. Send to the superclass of the current class. 370/// 371/// All four kinds of message sends are modeled by the ObjCMessageExpr 372/// class, and can be distinguished via \c getReceiverKind(). Example: 373/// 374class ObjCMessageExpr : public Expr { 375 /// \brief The number of arguments in the message send, not 376 /// including the receiver. 377 unsigned NumArgs : 16; 378 379 /// \brief The kind of message send this is, which is one of the 380 /// ReceiverKind values. 381 /// 382 /// We pad this out to a byte to avoid excessive masking and shifting. 383 unsigned Kind : 8; 384 385 /// \brief Whether we have an actual method prototype in \c 386 /// SelectorOrMethod. 387 /// 388 /// When non-zero, we have a method declaration; otherwise, we just 389 /// have a selector. 390 unsigned HasMethod : 8; 391 392 /// \brief When the message expression is a send to 'super', this is 393 /// the location of the 'super' keyword. 394 SourceLocation SuperLoc; 395 396 /// \brief Stores either the selector that this message is sending 397 /// to (when \c HasMethod is zero) or an \c ObjCMethodDecl pointer 398 /// referring to the method that we type-checked against. 399 uintptr_t SelectorOrMethod; 400 401 /// \brief The source locations of the open and close square 402 /// brackets ('[' and ']', respectively). 403 SourceLocation LBracLoc, RBracLoc; 404 405 ObjCMessageExpr(EmptyShell Empty, unsigned NumArgs) 406 : Expr(ObjCMessageExprClass, Empty), NumArgs(NumArgs), Kind(0), 407 HasMethod(0), SelectorOrMethod(0) { } 408 409 ObjCMessageExpr(QualType T, 410 SourceLocation LBracLoc, 411 SourceLocation SuperLoc, 412 bool IsInstanceSuper, 413 QualType SuperType, 414 Selector Sel, 415 ObjCMethodDecl *Method, 416 Expr **Args, unsigned NumArgs, 417 SourceLocation RBracLoc); 418 ObjCMessageExpr(QualType T, 419 SourceLocation LBracLoc, 420 TypeSourceInfo *Receiver, 421 Selector Sel, 422 ObjCMethodDecl *Method, 423 Expr **Args, unsigned NumArgs, 424 SourceLocation RBracLoc); 425 ObjCMessageExpr(QualType T, 426 SourceLocation LBracLoc, 427 Expr *Receiver, 428 Selector Sel, 429 ObjCMethodDecl *Method, 430 Expr **Args, unsigned NumArgs, 431 SourceLocation RBracLoc); 432 433 /// \brief Retrieve the pointer value of the message receiver. 434 void *getReceiverPointer() const { 435 return *const_cast<void **>( 436 reinterpret_cast<const void * const*>(this + 1)); 437 } 438 439 /// \brief Set the pointer value of the message receiver. 440 void setReceiverPointer(void *Value) { 441 *reinterpret_cast<void **>(this + 1) = Value; 442 } 443 444public: 445 /// \brief The kind of receiver this message is sending to. 446 enum ReceiverKind { 447 /// \brief The receiver is a class. 448 Class = 0, 449 /// \brief The receiver is an object instance. 450 Instance, 451 /// \brief The receiver is a superclass. 452 SuperClass, 453 /// \brief The receiver is the instance of the superclass object. 454 SuperInstance 455 }; 456 457 /// \brief Create a message send to super. 458 /// 459 /// \param Context The ASTContext in which this expression will be created. 460 /// 461 /// \param T The result type of this message. 462 /// 463 /// \param LBrac The location of the open square bracket '['. 464 /// 465 /// \param SuperLoc The location of the "super" keyword. 466 /// 467 /// \param IsInstanceSuper Whether this is an instance "super" 468 /// message (otherwise, it's a class "super" message). 469 /// 470 /// \param Sel The selector used to determine which method gets called. 471 /// 472 /// \param Method The Objective-C method against which this message 473 /// send was type-checked. May be NULL. 474 /// 475 /// \param Args The message send arguments. 476 /// 477 /// \param NumArgs The number of arguments. 478 /// 479 /// \param RBracLoc The location of the closing square bracket ']'. 480 static ObjCMessageExpr *Create(ASTContext &Context, QualType T, 481 SourceLocation LBracLoc, 482 SourceLocation SuperLoc, 483 bool IsInstanceSuper, 484 QualType SuperType, 485 Selector Sel, 486 ObjCMethodDecl *Method, 487 Expr **Args, unsigned NumArgs, 488 SourceLocation RBracLoc); 489 490 /// \brief Create a class message send. 491 /// 492 /// \param Context The ASTContext in which this expression will be created. 493 /// 494 /// \param T The result type of this message. 495 /// 496 /// \param LBrac The location of the open square bracket '['. 497 /// 498 /// \param Receiver The type of the receiver, including 499 /// source-location information. 500 /// 501 /// \param Sel The selector used to determine which method gets called. 502 /// 503 /// \param Method The Objective-C method against which this message 504 /// send was type-checked. May be NULL. 505 /// 506 /// \param Args The message send arguments. 507 /// 508 /// \param NumArgs The number of arguments. 509 /// 510 /// \param RBracLoc The location of the closing square bracket ']'. 511 static ObjCMessageExpr *Create(ASTContext &Context, QualType T, 512 SourceLocation LBracLoc, 513 TypeSourceInfo *Receiver, 514 Selector Sel, 515 ObjCMethodDecl *Method, 516 Expr **Args, unsigned NumArgs, 517 SourceLocation RBracLoc); 518 519 /// \brief Create an instance message send. 520 /// 521 /// \param Context The ASTContext in which this expression will be created. 522 /// 523 /// \param T The result type of this message. 524 /// 525 /// \param LBrac The location of the open square bracket '['. 526 /// 527 /// \param Receiver The expression used to produce the object that 528 /// will receive this message. 529 /// 530 /// \param Sel The selector used to determine which method gets called. 531 /// 532 /// \param Method The Objective-C method against which this message 533 /// send was type-checked. May be NULL. 534 /// 535 /// \param Args The message send arguments. 536 /// 537 /// \param NumArgs The number of arguments. 538 /// 539 /// \param RBracLoc The location of the closing square bracket ']'. 540 static ObjCMessageExpr *Create(ASTContext &Context, QualType T, 541 SourceLocation LBracLoc, 542 Expr *Receiver, 543 Selector Sel, 544 ObjCMethodDecl *Method, 545 Expr **Args, unsigned NumArgs, 546 SourceLocation RBracLoc); 547 548 /// \brief Create an empty Objective-C message expression, to be 549 /// filled in by subsequent calls. 550 /// 551 /// \param Context The context in which the message send will be created. 552 /// 553 /// \param NumArgs The number of message arguments, not including 554 /// the receiver. 555 static ObjCMessageExpr *CreateEmpty(ASTContext &Context, unsigned NumArgs); 556 557 /// \brief Determine the kind of receiver that this message is being 558 /// sent to. 559 ReceiverKind getReceiverKind() const { return (ReceiverKind)Kind; } 560 561 /// \brief Determine whether this is an instance message to either a 562 /// computed object or to super. 563 bool isInstanceMessage() const { 564 return getReceiverKind() == Instance || getReceiverKind() == SuperInstance; 565 } 566 567 /// \brief Determine whether this is an class message to either a 568 /// specified class or to super. 569 bool isClassMessage() const { 570 return getReceiverKind() == Class || getReceiverKind() == SuperClass; 571 } 572 573 /// \brief Returns the receiver of an instance message. 574 /// 575 /// \brief Returns the object expression for an instance message, or 576 /// NULL for a message that is not an instance message. 577 Expr *getInstanceReceiver() { 578 if (getReceiverKind() == Instance) 579 return static_cast<Expr *>(getReceiverPointer()); 580 581 return 0; 582 } 583 const Expr *getInstanceReceiver() const { 584 return const_cast<ObjCMessageExpr*>(this)->getInstanceReceiver(); 585 } 586 587 /// \brief Turn this message send into an instance message that 588 /// computes the receiver object with the given expression. 589 void setInstanceReceiver(Expr *rec) { 590 Kind = Instance; 591 setReceiverPointer(rec); 592 } 593 594 /// \brief Returns the type of a class message send, or NULL if the 595 /// message is not a class message. 596 QualType getClassReceiver() const { 597 if (TypeSourceInfo *TSInfo = getClassReceiverTypeInfo()) 598 return TSInfo->getType(); 599 600 return QualType(); 601 } 602 603 /// \brief Returns a type-source information of a class message 604 /// send, or NULL if the message is not a class message. 605 TypeSourceInfo *getClassReceiverTypeInfo() const { 606 if (getReceiverKind() == Class) 607 return reinterpret_cast<TypeSourceInfo *>(getReceiverPointer()); 608 return 0; 609 } 610 611 void setClassReceiver(TypeSourceInfo *TSInfo) { 612 Kind = Class; 613 setReceiverPointer(TSInfo); 614 } 615 616 /// \brief Retrieve the location of the 'super' keyword for a class 617 /// or instance message to 'super', otherwise an invalid source location. 618 SourceLocation getSuperLoc() const { 619 if (getReceiverKind() == SuperInstance || getReceiverKind() == SuperClass) 620 return SuperLoc; 621 622 return SourceLocation(); 623 } 624 625 /// \brief Retrieve the Objective-C interface to which this message 626 /// is being directed, if known. 627 /// 628 /// This routine cross-cuts all of the different kinds of message 629 /// sends to determine what the underlying (statically known) type 630 /// of the receiver will be; use \c getReceiverKind() to determine 631 /// whether the message is a class or an instance method, whether it 632 /// is a send to super or not, etc. 633 /// 634 /// \returns The Objective-C interface if known, otherwise NULL. 635 ObjCInterfaceDecl *getReceiverInterface() const; 636 637 /// \brief Retrieve the type referred to by 'super'. 638 /// 639 /// The returned type will either be an ObjCInterfaceType (for an 640 /// class message to super) or an ObjCObjectPointerType that refers 641 /// to a class (for an instance message to super); 642 QualType getSuperType() const { 643 if (getReceiverKind() == SuperInstance || getReceiverKind() == SuperClass) 644 return QualType::getFromOpaquePtr(getReceiverPointer()); 645 646 return QualType(); 647 } 648 649 void setSuper(SourceLocation Loc, QualType T, bool IsInstanceSuper) { 650 Kind = IsInstanceSuper? SuperInstance : SuperClass; 651 SuperLoc = Loc; 652 setReceiverPointer(T.getAsOpaquePtr()); 653 } 654 655 Selector getSelector() const; 656 657 void setSelector(Selector S) { 658 HasMethod = false; 659 SelectorOrMethod = reinterpret_cast<uintptr_t>(S.getAsOpaquePtr()); 660 } 661 662 const ObjCMethodDecl *getMethodDecl() const { 663 if (HasMethod) 664 return reinterpret_cast<const ObjCMethodDecl *>(SelectorOrMethod); 665 666 return 0; 667 } 668 669 ObjCMethodDecl *getMethodDecl() { 670 if (HasMethod) 671 return reinterpret_cast<ObjCMethodDecl *>(SelectorOrMethod); 672 673 return 0; 674 } 675 676 void setMethodDecl(ObjCMethodDecl *MD) { 677 HasMethod = true; 678 SelectorOrMethod = reinterpret_cast<uintptr_t>(MD); 679 } 680 681 /// \brief Return the number of actual arguments in this message, 682 /// not counting the receiver. 683 unsigned getNumArgs() const { return NumArgs; } 684 685 /// \brief Retrieve the arguments to this message, not including the 686 /// receiver. 687 Stmt **getArgs() { 688 return reinterpret_cast<Stmt **>(this + 1) + 1; 689 } 690 const Stmt * const *getArgs() const { 691 return reinterpret_cast<const Stmt * const *>(this + 1) + 1; 692 } 693 694 /// getArg - Return the specified argument. 695 Expr *getArg(unsigned Arg) { 696 assert(Arg < NumArgs && "Arg access out of range!"); 697 return cast<Expr>(getArgs()[Arg]); 698 } 699 const Expr *getArg(unsigned Arg) const { 700 assert(Arg < NumArgs && "Arg access out of range!"); 701 return cast<Expr>(getArgs()[Arg]); 702 } 703 /// setArg - Set the specified argument. 704 void setArg(unsigned Arg, Expr *ArgExpr) { 705 assert(Arg < NumArgs && "Arg access out of range!"); 706 getArgs()[Arg] = ArgExpr; 707 } 708 709 SourceLocation getLeftLoc() const { return LBracLoc; } 710 SourceLocation getRightLoc() const { return RBracLoc; } 711 712 void setLeftLoc(SourceLocation L) { LBracLoc = L; } 713 void setRightLoc(SourceLocation L) { RBracLoc = L; } 714 715 void setSourceRange(SourceRange R) { 716 LBracLoc = R.getBegin(); 717 RBracLoc = R.getEnd(); 718 } 719 virtual SourceRange getSourceRange() const { 720 return SourceRange(LBracLoc, RBracLoc); 721 } 722 723 static bool classof(const Stmt *T) { 724 return T->getStmtClass() == ObjCMessageExprClass; 725 } 726 static bool classof(const ObjCMessageExpr *) { return true; } 727 728 // Iterators 729 virtual child_iterator child_begin(); 730 virtual child_iterator child_end(); 731 732 typedef ExprIterator arg_iterator; 733 typedef ConstExprIterator const_arg_iterator; 734 735 arg_iterator arg_begin() { return getArgs(); } 736 arg_iterator arg_end() { return getArgs() + NumArgs; } 737 const_arg_iterator arg_begin() const { return getArgs(); } 738 const_arg_iterator arg_end() const { return getArgs() + NumArgs; } 739}; 740 741/// ObjCSuperExpr - Represents the "super" expression in Objective-C, 742/// which refers to the object on which the current method is executing. 743/// 744/// FIXME: This class is intended for removal, once its remaining 745/// clients have been altered to represent "super" internally. 746class ObjCSuperExpr : public Expr { 747 SourceLocation Loc; 748public: 749 ObjCSuperExpr(SourceLocation L, QualType Type) 750 : Expr(ObjCSuperExprClass, Type, false, false), Loc(L) { } 751 explicit ObjCSuperExpr(EmptyShell Empty) : Expr(ObjCSuperExprClass, Empty) {} 752 753 SourceLocation getLoc() const { return Loc; } 754 void setLoc(SourceLocation L) { Loc = L; } 755 756 virtual SourceRange getSourceRange() const { return SourceRange(Loc); } 757 758 static bool classof(const Stmt *T) { 759 return T->getStmtClass() == ObjCSuperExprClass; 760 } 761 static bool classof(const ObjCSuperExpr *) { return true; } 762 763 // Iterators 764 virtual child_iterator child_begin(); 765 virtual child_iterator child_end(); 766}; 767 768/// ObjCIsaExpr - Represent X->isa and X.isa when X is an ObjC 'id' type. 769/// (similiar in spirit to MemberExpr). 770class ObjCIsaExpr : public Expr { 771 /// Base - the expression for the base object pointer. 772 Stmt *Base; 773 774 /// IsaMemberLoc - This is the location of the 'isa'. 775 SourceLocation IsaMemberLoc; 776 777 /// IsArrow - True if this is "X->F", false if this is "X.F". 778 bool IsArrow; 779public: 780 ObjCIsaExpr(Expr *base, bool isarrow, SourceLocation l, QualType ty) 781 : Expr(ObjCIsaExprClass, ty, /*TypeDependent=*/false, 782 base->isValueDependent()), 783 Base(base), IsaMemberLoc(l), IsArrow(isarrow) {} 784 785 /// \brief Build an empty expression. 786 explicit ObjCIsaExpr(EmptyShell Empty) : Expr(ObjCIsaExprClass, Empty) { } 787 788 void setBase(Expr *E) { Base = E; } 789 Expr *getBase() const { return cast<Expr>(Base); } 790 791 bool isArrow() const { return IsArrow; } 792 void setArrow(bool A) { IsArrow = A; } 793 794 /// getMemberLoc - Return the location of the "member", in X->F, it is the 795 /// location of 'F'. 796 SourceLocation getIsaMemberLoc() const { return IsaMemberLoc; } 797 void setIsaMemberLoc(SourceLocation L) { IsaMemberLoc = L; } 798 799 virtual SourceRange getSourceRange() const { 800 return SourceRange(getBase()->getLocStart(), IsaMemberLoc); 801 } 802 803 virtual SourceLocation getExprLoc() const { return IsaMemberLoc; } 804 805 static bool classof(const Stmt *T) { 806 return T->getStmtClass() == ObjCIsaExprClass; 807 } 808 static bool classof(const ObjCIsaExpr *) { return true; } 809 810 // Iterators 811 virtual child_iterator child_begin(); 812 virtual child_iterator child_end(); 813}; 814 815} // end namespace clang 816 817#endif 818