DeclObjC.h revision e7f9d301a10b4b3223e91d9be4362b44cba0a212 
1//===--- DeclObjC.h - Classes for representing declarations -----*- 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 DeclObjC interface and subclasses.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_CLANG_AST_DECLOBJC_H
15#define LLVM_CLANG_AST_DECLOBJC_H
16
17#include "clang/AST/Decl.h"
18#include "llvm/ADT/STLExtras.h"
19
20namespace clang {
21class Expr;
22class Stmt;
23class FunctionDecl;
24class AttributeList;
25class RecordDecl;
26class ObjCIvarDecl;
27class ObjCMethodDecl;
28class ObjCProtocolDecl;
29class ObjCCategoryDecl;
30class ObjCPropertyDecl;
31class ObjCPropertyImplDecl;
32
33class ObjCListBase {
34  void operator=(const ObjCListBase &);     // DO NOT IMPLEMENT
35  ObjCListBase(const ObjCListBase&);        // DO NOT IMPLEMENT
36protected:
37  /// List is an array of pointers to objects that are not owned by this object.
38  void **List;
39  unsigned NumElts;
40
41public:
42  ObjCListBase() : List(0), NumElts(0) {}
43  ~ObjCListBase() {
44    assert(List == 0 && "Destroy should have been called before dtor");
45  }
46
47  void Destroy(ASTContext &Ctx);
48
49  unsigned size() const { return NumElts; }
50  bool empty() const { return NumElts == 0; }
51
52protected:
53  void set(void *const* InList, unsigned Elts, ASTContext &Ctx);
54};
55
56
57/// ObjCList - This is a simple template class used to hold various lists of
58/// decls etc, which is heavily used by the ObjC front-end.  This only use case
59/// this supports is setting the list all at once and then reading elements out
60/// of it.
61template <typename T>
62class ObjCList : public ObjCListBase {
63public:
64  void set(T* const* InList, unsigned Elts, ASTContext &Ctx) {
65    ObjCListBase::set(reinterpret_cast<void*const*>(InList), Elts, Ctx);
66  }
67
68  typedef T* const * iterator;
69  iterator begin() const { return (iterator)List; }
70  iterator end() const { return (iterator)List+NumElts; }
71
72  T* operator[](unsigned Idx) const {
73    assert(Idx < NumElts && "Invalid access");
74    return (T*)List[Idx];
75  }
76};
77
78
79
80/// ObjCMethodDecl - Represents an instance or class method declaration.
81/// ObjC methods can be declared within 4 contexts: class interfaces,
82/// categories, protocols, and class implementations. While C++ member
83/// functions leverage C syntax, Objective-C method syntax is modeled after
84/// Smalltalk (using colons to specify argument types/expressions).
85/// Here are some brief examples:
86///
87/// Setter/getter instance methods:
88/// - (void)setMenu:(NSMenu *)menu;
89/// - (NSMenu *)menu;
90///
91/// Instance method that takes 2 NSView arguments:
92/// - (void)replaceSubview:(NSView *)oldView with:(NSView *)newView;
93///
94/// Getter class method:
95/// + (NSMenu *)defaultMenu;
96///
97/// A selector represents a unique name for a method. The selector names for
98/// the above methods are setMenu:, menu, replaceSubview:with:, and defaultMenu.
99///
100class ObjCMethodDecl : public NamedDecl, public DeclContext {
101public:
102  enum ImplementationControl { None, Required, Optional };
103private:
104  /// Bitfields must be first fields in this class so they pack with those
105  /// declared in class Decl.
106  /// instance (true) or class (false) method.
107  bool IsInstance : 1;
108  bool IsVariadic : 1;
109
110  // Synthesized declaration method for a property setter/getter
111  bool IsSynthesized : 1;
112
113  // NOTE: VC++ treats enums as signed, avoid using ImplementationControl enum
114  /// @required/@optional
115  unsigned DeclImplementation : 2;
116
117  // NOTE: VC++ treats enums as signed, avoid using the ObjCDeclQualifier enum
118  /// in, inout, etc.
119  unsigned objcDeclQualifier : 6;
120
121  // Type of this method.
122  QualType MethodDeclType;
123  /// ParamInfo - List of pointers to VarDecls for the formal parameters of this
124  /// Method.
125  ObjCList<ParmVarDecl> ParamInfo;
126
127  /// List of attributes for this method declaration.
128  SourceLocation EndLoc; // the location of the ';' or '}'.
129
130  // The following are only used for method definitions, null otherwise.
131  // FIXME: space savings opportunity, consider a sub-class.
132  Stmt *Body;
133
134  /// SelfDecl - Decl for the implicit self parameter. This is lazily
135  /// constructed by createImplicitParams.
136  ImplicitParamDecl *SelfDecl;
137  /// CmdDecl - Decl for the implicit _cmd parameter. This is lazily
138  /// constructed by createImplicitParams.
139  ImplicitParamDecl *CmdDecl;
140
141  ObjCMethodDecl(SourceLocation beginLoc, SourceLocation endLoc,
142                 Selector SelInfo, QualType T,
143                 DeclContext *contextDecl,
144                 bool isInstance = true,
145                 bool isVariadic = false,
146                 bool isSynthesized = false,
147                 ImplementationControl impControl = None)
148  : NamedDecl(ObjCMethod, contextDecl, beginLoc, SelInfo),
149    DeclContext(ObjCMethod),
150    IsInstance(isInstance), IsVariadic(isVariadic),
151    IsSynthesized(isSynthesized),
152    DeclImplementation(impControl), objcDeclQualifier(OBJC_TQ_None),
153    MethodDeclType(T),
154    EndLoc(endLoc), Body(0), SelfDecl(0), CmdDecl(0) {}
155
156  virtual ~ObjCMethodDecl() {}
157
158  /// \brief A definition will return its interface declaration.
159  /// An interface declaration will return its definition.
160  /// Otherwise it will return itself.
161  virtual ObjCMethodDecl *getNextRedeclaration();
162
163public:
164
165  /// Destroy - Call destructors and release memory.
166  virtual void Destroy(ASTContext& C);
167
168  static ObjCMethodDecl *Create(ASTContext &C,
169                                SourceLocation beginLoc,
170                                SourceLocation endLoc, Selector SelInfo,
171                                QualType T, DeclContext *contextDecl,
172                                bool isInstance = true,
173                                bool isVariadic = false,
174                                bool isSynthesized = false,
175                                ImplementationControl impControl = None);
176
177  virtual ObjCMethodDecl *getCanonicalDecl();
178
179  ObjCDeclQualifier getObjCDeclQualifier() const {
180    return ObjCDeclQualifier(objcDeclQualifier);
181  }
182  void setObjCDeclQualifier(ObjCDeclQualifier QV) { objcDeclQualifier = QV; }
183
184  // Location information, modeled after the Stmt API.
185  SourceLocation getLocStart() const { return getLocation(); }
186  SourceLocation getLocEnd() const { return EndLoc; }
187  void setEndLoc(SourceLocation Loc) { EndLoc = Loc; }
188  virtual SourceRange getSourceRange() const {
189    return SourceRange(getLocation(), EndLoc);
190  }
191
192  ObjCInterfaceDecl *getClassInterface();
193  const ObjCInterfaceDecl *getClassInterface() const {
194    return const_cast<ObjCMethodDecl*>(this)->getClassInterface();
195  }
196
197  Selector getSelector() const { return getDeclName().getObjCSelector(); }
198  unsigned getSynthesizedMethodSize() const;
199  QualType getResultType() const { return MethodDeclType; }
200  void setResultType(QualType T) { MethodDeclType = T; }
201
202  // Iterator access to formal parameters.
203  unsigned param_size() const { return ParamInfo.size(); }
204  typedef ObjCList<ParmVarDecl>::iterator param_iterator;
205  param_iterator param_begin() const { return ParamInfo.begin(); }
206  param_iterator param_end() const { return ParamInfo.end(); }
207
208  void setMethodParams(ASTContext &C, ParmVarDecl *const *List, unsigned Num) {
209    ParamInfo.set(List, Num, C);
210  }
211
212  // Iterator access to parameter types.
213  typedef std::const_mem_fun_t<QualType, ParmVarDecl> deref_fun;
214  typedef llvm::mapped_iterator<param_iterator, deref_fun> arg_type_iterator;
215
216  arg_type_iterator arg_type_begin() const {
217    return llvm::map_iterator(param_begin(), deref_fun(&ParmVarDecl::getType));
218  }
219  arg_type_iterator arg_type_end() const {
220    return llvm::map_iterator(param_end(), deref_fun(&ParmVarDecl::getType));
221  }
222
223  /// createImplicitParams - Used to lazily create the self and cmd
224  /// implict parameters. This must be called prior to using getSelfDecl()
225  /// or getCmdDecl(). The call is ignored if the implicit paramters
226  /// have already been created.
227  void createImplicitParams(ASTContext &Context, const ObjCInterfaceDecl *ID);
228
229  ImplicitParamDecl * getSelfDecl() const { return SelfDecl; }
230  void setSelfDecl(ImplicitParamDecl *SD) { SelfDecl = SD; }
231  ImplicitParamDecl * getCmdDecl() const { return CmdDecl; }
232  void setCmdDecl(ImplicitParamDecl *CD) { CmdDecl = CD; }
233
234  bool isInstanceMethod() const { return IsInstance; }
235  void setInstanceMethod(bool isInst) { IsInstance = isInst; }
236  bool isVariadic() const { return IsVariadic; }
237  void setVariadic(bool isVar) { IsVariadic = isVar; }
238
239  bool isClassMethod() const { return !IsInstance; }
240
241  bool isSynthesized() const { return IsSynthesized; }
242  void setSynthesized(bool isSynth) { IsSynthesized = isSynth; }
243
244  // Related to protocols declared in  @protocol
245  void setDeclImplementation(ImplementationControl ic) {
246    DeclImplementation = ic;
247  }
248  ImplementationControl getImplementationControl() const {
249    return ImplementationControl(DeclImplementation);
250  }
251
252  virtual Stmt *getBody() const {
253    return (Stmt*) Body;
254  }
255  CompoundStmt *getCompoundBody() { return (CompoundStmt*)Body; }
256  void setBody(Stmt *B) { Body = B; }
257
258  // Implement isa/cast/dyncast/etc.
259  static bool classof(const Decl *D) { return D->getKind() == ObjCMethod; }
260  static bool classof(const ObjCMethodDecl *D) { return true; }
261  static DeclContext *castToDeclContext(const ObjCMethodDecl *D) {
262    return static_cast<DeclContext *>(const_cast<ObjCMethodDecl*>(D));
263  }
264  static ObjCMethodDecl *castFromDeclContext(const DeclContext *DC) {
265    return static_cast<ObjCMethodDecl *>(const_cast<DeclContext*>(DC));
266  }
267};
268
269/// ObjCMethodList - a linked list of methods with different signatures.
270struct ObjCMethodList {
271  ObjCMethodDecl *Method;
272  ObjCMethodList *Next;
273
274  ObjCMethodList() {
275    Method = 0;
276    Next = 0;
277  }
278  ObjCMethodList(ObjCMethodDecl *M, ObjCMethodList *C) {
279    Method = M;
280    Next = C;
281  }
282};
283
284/// ObjCContainerDecl - Represents a container for method declarations.
285/// Current sub-classes are ObjCInterfaceDecl, ObjCCategoryDecl,
286/// ObjCProtocolDecl, and ObjCImplDecl.
287///
288class ObjCContainerDecl : public NamedDecl, public DeclContext {
289  SourceLocation AtEndLoc; // marks the end of the method container.
290public:
291
292  ObjCContainerDecl(Kind DK, DeclContext *DC, SourceLocation L,
293                    IdentifierInfo *Id)
294    : NamedDecl(DK, DC, L, Id), DeclContext(DK) {}
295
296  virtual ~ObjCContainerDecl() {}
297
298  // Iterator access to properties.
299  typedef specific_decl_iterator<ObjCPropertyDecl> prop_iterator;
300  prop_iterator prop_begin() const {
301    return prop_iterator(decls_begin());
302  }
303  prop_iterator prop_end() const {
304    return prop_iterator(decls_end());
305  }
306
307  // Iterator access to instance/class methods.
308  typedef specific_decl_iterator<ObjCMethodDecl> method_iterator;
309  method_iterator meth_begin() const {
310    return method_iterator(decls_begin());
311  }
312  method_iterator meth_end() const {
313    return method_iterator(decls_end());
314  }
315
316  typedef filtered_decl_iterator<ObjCMethodDecl,
317                                 &ObjCMethodDecl::isInstanceMethod>
318    instmeth_iterator;
319  instmeth_iterator instmeth_begin() const {
320    return instmeth_iterator(decls_begin());
321  }
322  instmeth_iterator instmeth_end() const {
323    return instmeth_iterator(decls_end());
324  }
325
326  typedef filtered_decl_iterator<ObjCMethodDecl,
327                                 &ObjCMethodDecl::isClassMethod>
328    classmeth_iterator;
329  classmeth_iterator classmeth_begin() const {
330    return classmeth_iterator(decls_begin());
331  }
332  classmeth_iterator classmeth_end() const {
333    return classmeth_iterator(decls_end());
334  }
335
336  // Get the local instance/class method declared in this interface.
337  ObjCMethodDecl *getMethod(Selector Sel, bool isInstance) const;
338  ObjCMethodDecl *getInstanceMethod(Selector Sel) const {
339    return getMethod(Sel, true/*isInstance*/);
340  }
341  ObjCMethodDecl *getClassMethod(Selector Sel) const {
342    return getMethod(Sel, false/*isInstance*/);
343  }
344  ObjCIvarDecl *getIvarDecl(IdentifierInfo *Id) const;
345
346  ObjCPropertyDecl *FindPropertyDeclaration(IdentifierInfo *PropertyId) const;
347
348  // Marks the end of the container.
349  SourceLocation getAtEndLoc() const { return AtEndLoc; }
350  void setAtEndLoc(SourceLocation L) { AtEndLoc = L; }
351
352  virtual SourceRange getSourceRange() const {
353    return SourceRange(getLocation(), getAtEndLoc());
354  }
355
356  // Implement isa/cast/dyncast/etc.
357  static bool classof(const Decl *D) {
358    return D->getKind() >= ObjCContainerFirst &&
359           D->getKind() <= ObjCContainerLast;
360  }
361  static bool classof(const ObjCContainerDecl *D) { return true; }
362
363  static DeclContext *castToDeclContext(const ObjCContainerDecl *D) {
364    return static_cast<DeclContext *>(const_cast<ObjCContainerDecl*>(D));
365  }
366  static ObjCContainerDecl *castFromDeclContext(const DeclContext *DC) {
367    return static_cast<ObjCContainerDecl *>(const_cast<DeclContext*>(DC));
368  }
369};
370
371/// ObjCInterfaceDecl - Represents an ObjC class declaration. For example:
372///
373///   // MostPrimitive declares no super class (not particularly useful).
374///   @interface MostPrimitive
375///     // no instance variables or methods.
376///   @end
377///
378///   // NSResponder inherits from NSObject & implements NSCoding (a protocol).
379///   @interface NSResponder : NSObject <NSCoding>
380///   { // instance variables are represented by ObjCIvarDecl.
381///     id nextResponder; // nextResponder instance variable.
382///   }
383///   - (NSResponder *)nextResponder; // return a pointer to NSResponder.
384///   - (void)mouseMoved:(NSEvent *)theEvent; // return void, takes a pointer
385///   @end                                    // to an NSEvent.
386///
387///   Unlike C/C++, forward class declarations are accomplished with @class.
388///   Unlike C/C++, @class allows for a list of classes to be forward declared.
389///   Unlike C++, ObjC is a single-rooted class model. In Cocoa, classes
390///   typically inherit from NSObject (an exception is NSProxy).
391///
392class ObjCInterfaceDecl : public ObjCContainerDecl {
393  /// TypeForDecl - This indicates the Type object that represents this
394  /// TypeDecl.  It is a cache maintained by ASTContext::getObjCInterfaceType
395  mutable Type *TypeForDecl;
396  friend class ASTContext;
397
398  /// Class's super class.
399  ObjCInterfaceDecl *SuperClass;
400
401  /// Protocols referenced in interface header declaration
402  ObjCList<ObjCProtocolDecl> ReferencedProtocols;
403
404  /// Instance variables in the interface.
405  ObjCList<ObjCIvarDecl> IVars;
406
407  /// List of categories defined for this class.
408  /// FIXME: Why is this a linked list??
409  ObjCCategoryDecl *CategoryList;
410
411  bool ForwardDecl:1; // declared with @class.
412  bool InternalInterface:1; // true - no @interface for @implementation
413
414  SourceLocation ClassLoc; // location of the class identifier.
415  SourceLocation SuperClassLoc; // location of the super class identifier.
416  SourceLocation EndLoc; // marks the '>', '}', or identifier.
417
418  ObjCInterfaceDecl(DeclContext *DC, SourceLocation atLoc, IdentifierInfo *Id,
419                    SourceLocation CLoc, bool FD, bool isInternal);
420
421  virtual ~ObjCInterfaceDecl() {}
422
423public:
424
425  /// Destroy - Call destructors and release memory.
426  virtual void Destroy(ASTContext& C);
427
428  static ObjCInterfaceDecl *Create(ASTContext &C, DeclContext *DC,
429                                   SourceLocation atLoc,
430                                   IdentifierInfo *Id,
431                                   SourceLocation ClassLoc = SourceLocation(),
432                                   bool ForwardDecl = false,
433                                   bool isInternal = false);
434  const ObjCList<ObjCProtocolDecl> &getReferencedProtocols() const {
435    return ReferencedProtocols;
436  }
437
438  ObjCImplementationDecl *getImplementation() const;
439  void setImplementation(ObjCImplementationDecl *ImplD);
440
441  ObjCCategoryDecl *FindCategoryDeclaration(IdentifierInfo *CategoryId) const;
442
443  // Get the local instance/class method declared in a category.
444  ObjCMethodDecl *getCategoryInstanceMethod(Selector Sel) const;
445  ObjCMethodDecl *getCategoryClassMethod(Selector Sel) const;
446  ObjCMethodDecl *getCategoryMethod(Selector Sel, bool isInstance) const {
447    return isInstance ? getInstanceMethod(Sel)
448                      : getClassMethod(Sel);
449  }
450
451  typedef ObjCList<ObjCProtocolDecl>::iterator protocol_iterator;
452  protocol_iterator protocol_begin() const {return ReferencedProtocols.begin();}
453  protocol_iterator protocol_end() const { return ReferencedProtocols.end(); }
454  unsigned protocol_size() const { return ReferencedProtocols.size(); }
455
456  typedef ObjCList<ObjCIvarDecl>::iterator ivar_iterator;
457  ivar_iterator ivar_begin() const { return IVars.begin(); }
458  ivar_iterator ivar_end() const { return IVars.end(); }
459  unsigned ivar_size() const { return IVars.size(); }
460  bool ivar_empty() const { return IVars.empty(); }
461
462  /// setProtocolList - Set the list of protocols that this interface
463  /// implements.
464  void setProtocolList(ObjCProtocolDecl *const* List, unsigned Num,
465                       ASTContext &C) {
466    ReferencedProtocols.set(List, Num, C);
467  }
468
469  void setIVarList(ObjCIvarDecl * const *List, unsigned Num, ASTContext &C) {
470    IVars.set(List, Num, C);
471  }
472
473  bool isForwardDecl() const { return ForwardDecl; }
474  void setForwardDecl(bool val) { ForwardDecl = val; }
475
476  ObjCInterfaceDecl *getSuperClass() const { return SuperClass; }
477  void setSuperClass(ObjCInterfaceDecl * superCls) { SuperClass = superCls; }
478
479  ObjCCategoryDecl* getCategoryList() const { return CategoryList; }
480  void setCategoryList(ObjCCategoryDecl *category) {
481    CategoryList = category;
482  }
483
484  /// isSuperClassOf - Return true if this class is the specified class or is a
485  /// super class of the specified interface class.
486  bool isSuperClassOf(const ObjCInterfaceDecl *I) const {
487    // If RHS is derived from LHS it is OK; else it is not OK.
488    while (I != NULL) {
489      if (this == I)
490        return true;
491      I = I->getSuperClass();
492    }
493    return false;
494  }
495
496  ObjCIvarDecl *lookupInstanceVariable(IdentifierInfo *IVarName,
497                                       ObjCInterfaceDecl *&ClassDeclared);
498  ObjCIvarDecl *lookupInstanceVariable(IdentifierInfo *IVarName) {
499    ObjCInterfaceDecl *ClassDeclared;
500    return lookupInstanceVariable(IVarName, ClassDeclared);
501  }
502
503  // Lookup a method. First, we search locally. If a method isn't
504  // found, we search referenced protocols and class categories.
505  ObjCMethodDecl *lookupMethod(Selector Sel, bool isInstance) const;
506  ObjCMethodDecl *lookupInstanceMethod(Selector Sel) const {
507    return lookupMethod(Sel, true/*isInstance*/);
508  }
509  ObjCMethodDecl *lookupClassMethod(Selector Sel) const {
510    return lookupMethod(Sel, false/*isInstance*/);
511  }
512  ObjCInterfaceDecl *lookupInheritedClass(const IdentifierInfo *ICName);
513
514  // Location information, modeled after the Stmt API.
515  SourceLocation getLocStart() const { return getLocation(); } // '@'interface
516  SourceLocation getLocEnd() const { return EndLoc; }
517  void setLocEnd(SourceLocation LE) { EndLoc = LE; };
518
519  void setClassLoc(SourceLocation Loc) { ClassLoc = Loc; }
520  SourceLocation getClassLoc() const { return ClassLoc; }
521  void setSuperClassLoc(SourceLocation Loc) { SuperClassLoc = Loc; }
522  SourceLocation getSuperClassLoc() const { return SuperClassLoc; }
523
524  /// isImplicitInterfaceDecl - check that this is an implicitly declared
525  /// ObjCInterfaceDecl node. This is for legacy objective-c @implementation
526  /// declaration without an @interface declaration.
527  bool isImplicitInterfaceDecl() const { return InternalInterface; }
528  void setImplicitInterfaceDecl(bool val) { InternalInterface = val; }
529
530  // Low-level accessor
531  Type *getTypeForDecl() const { return TypeForDecl; }
532  void setTypeForDecl(Type *TD) const { TypeForDecl = TD; }
533
534  static bool classof(const Decl *D) { return D->getKind() == ObjCInterface; }
535  static bool classof(const ObjCInterfaceDecl *D) { return true; }
536};
537
538/// ObjCIvarDecl - Represents an ObjC instance variable. In general, ObjC
539/// instance variables are identical to C. The only exception is Objective-C
540/// supports C++ style access control. For example:
541///
542///   @interface IvarExample : NSObject
543///   {
544///     id defaultToProtected;
545///   @public:
546///     id canBePublic; // same as C++.
547///   @protected:
548///     id canBeProtected; // same as C++.
549///   @package:
550///     id canBePackage; // framework visibility (not available in C++).
551///   }
552///
553class ObjCIvarDecl : public FieldDecl {
554public:
555  enum AccessControl {
556    None, Private, Protected, Public, Package
557  };
558
559private:
560  ObjCIvarDecl(DeclContext *DC, SourceLocation L, IdentifierInfo *Id,
561               QualType T, AccessControl ac, Expr *BW)
562    : FieldDecl(ObjCIvar, DC, L, Id, T, BW, /*Mutable=*/false),
563      DeclAccess(ac) {}
564
565public:
566  static ObjCIvarDecl *Create(ASTContext &C, DeclContext *DC, SourceLocation L,
567                              IdentifierInfo *Id, QualType T,
568                              AccessControl ac, Expr *BW = NULL);
569
570  void setAccessControl(AccessControl ac) { DeclAccess = ac; }
571
572  AccessControl getAccessControl() const { return AccessControl(DeclAccess); }
573
574  AccessControl getCanonicalAccessControl() const {
575    return DeclAccess == None ? Protected : AccessControl(DeclAccess);
576  }
577
578  // Implement isa/cast/dyncast/etc.
579  static bool classof(const Decl *D) { return D->getKind() == ObjCIvar; }
580  static bool classof(const ObjCIvarDecl *D) { return true; }
581private:
582  // NOTE: VC++ treats enums as signed, avoid using the AccessControl enum
583  unsigned DeclAccess : 3;
584};
585
586
587/// ObjCAtDefsFieldDecl - Represents a field declaration created by an
588///  @defs(...).
589class ObjCAtDefsFieldDecl : public FieldDecl {
590private:
591  ObjCAtDefsFieldDecl(DeclContext *DC, SourceLocation L, IdentifierInfo *Id,
592                      QualType T, Expr *BW)
593    : FieldDecl(ObjCAtDefsField, DC, L, Id, T, BW, /*Mutable=*/false) {}
594
595public:
596  static ObjCAtDefsFieldDecl *Create(ASTContext &C, DeclContext *DC,
597                                     SourceLocation L,
598                                     IdentifierInfo *Id, QualType T,
599                                     Expr *BW);
600
601  virtual void Destroy(ASTContext& C);
602
603  // Implement isa/cast/dyncast/etc.
604  static bool classof(const Decl *D) { return D->getKind() == ObjCAtDefsField; }
605  static bool classof(const ObjCAtDefsFieldDecl *D) { return true; }
606};
607
608/// ObjCProtocolDecl - Represents a protocol declaration. ObjC protocols
609/// declare a pure abstract type (i.e no instance variables are permitted).
610/// Protocols orginally drew inspiration from C++ pure virtual functions (a C++
611/// feature with nice semantics and lousy syntax:-). Here is an example:
612///
613/// @protocol NSDraggingInfo <refproto1, refproto2>
614/// - (NSWindow *)draggingDestinationWindow;
615/// - (NSImage *)draggedImage;
616/// @end
617///
618/// This says that NSDraggingInfo requires two methods and requires everything
619/// that the two "referenced protocols" 'refproto1' and 'refproto2' require as
620/// well.
621///
622/// @interface ImplementsNSDraggingInfo : NSObject <NSDraggingInfo>
623/// @end
624///
625/// ObjC protocols inspired Java interfaces. Unlike Java, ObjC classes and
626/// protocols are in distinct namespaces. For example, Cocoa defines both
627/// an NSObject protocol and class (which isn't allowed in Java). As a result,
628/// protocols are referenced using angle brackets as follows:
629///
630/// id <NSDraggingInfo> anyObjectThatImplementsNSDraggingInfo;
631///
632class ObjCProtocolDecl : public ObjCContainerDecl {
633  /// Referenced protocols
634  ObjCList<ObjCProtocolDecl> ReferencedProtocols;
635
636  bool isForwardProtoDecl; // declared with @protocol.
637
638  SourceLocation EndLoc; // marks the '>' or identifier.
639
640  ObjCProtocolDecl(DeclContext *DC, SourceLocation L, IdentifierInfo *Id)
641    : ObjCContainerDecl(ObjCProtocol, DC, L, Id),
642      isForwardProtoDecl(true) {
643  }
644
645  virtual ~ObjCProtocolDecl() {}
646
647public:
648  static ObjCProtocolDecl *Create(ASTContext &C, DeclContext *DC,
649                                  SourceLocation L, IdentifierInfo *Id);
650
651  /// Destroy - Call destructors and release memory.
652  virtual void Destroy(ASTContext& C);
653
654  const ObjCList<ObjCProtocolDecl> &getReferencedProtocols() const {
655    return ReferencedProtocols;
656  }
657  typedef ObjCList<ObjCProtocolDecl>::iterator protocol_iterator;
658  protocol_iterator protocol_begin() const {return ReferencedProtocols.begin();}
659  protocol_iterator protocol_end() const { return ReferencedProtocols.end(); }
660  unsigned protocol_size() const { return ReferencedProtocols.size(); }
661
662  /// setProtocolList - Set the list of protocols that this interface
663  /// implements.
664  void setProtocolList(ObjCProtocolDecl *const*List, unsigned Num,
665                       ASTContext &C) {
666    ReferencedProtocols.set(List, Num, C);
667  }
668
669  ObjCProtocolDecl *lookupProtocolNamed(IdentifierInfo *PName);
670
671  // Lookup a method. First, we search locally. If a method isn't
672  // found, we search referenced protocols and class categories.
673  ObjCMethodDecl *lookupMethod(Selector Sel, bool isInstance) const;
674  ObjCMethodDecl *lookupInstanceMethod(Selector Sel) const {
675    return lookupMethod(Sel, true/*isInstance*/);
676  }
677  ObjCMethodDecl *lookupClassMethod(Selector Sel) const {
678    return lookupMethod(Sel, false/*isInstance*/);
679  }
680
681  bool isForwardDecl() const { return isForwardProtoDecl; }
682  void setForwardDecl(bool val) { isForwardProtoDecl = val; }
683
684  // Location information, modeled after the Stmt API.
685  SourceLocation getLocStart() const { return getLocation(); } // '@'protocol
686  SourceLocation getLocEnd() const { return EndLoc; }
687  void setLocEnd(SourceLocation LE) { EndLoc = LE; };
688
689  static bool classof(const Decl *D) { return D->getKind() == ObjCProtocol; }
690  static bool classof(const ObjCProtocolDecl *D) { return true; }
691};
692
693/// ObjCClassDecl - Specifies a list of forward class declarations. For example:
694///
695/// @class NSCursor, NSImage, NSPasteboard, NSWindow;
696///
697class ObjCClassDecl : public Decl {
698  ObjCList<ObjCInterfaceDecl> ForwardDecls;
699
700  ObjCClassDecl(DeclContext *DC, SourceLocation L,
701                ObjCInterfaceDecl *const *Elts, unsigned nElts, ASTContext &C);
702  virtual ~ObjCClassDecl() {}
703public:
704
705  /// Destroy - Call destructors and release memory.
706  virtual void Destroy(ASTContext& C);
707
708  static ObjCClassDecl *Create(ASTContext &C, DeclContext *DC, SourceLocation L,
709                               ObjCInterfaceDecl *const *Elts = 0,
710                               unsigned nElts = 0);
711
712  typedef ObjCList<ObjCInterfaceDecl>::iterator iterator;
713  iterator begin() const { return ForwardDecls.begin(); }
714  iterator end() const { return ForwardDecls.end(); }
715  unsigned size() const { return ForwardDecls.size(); }
716
717  /// setClassList - Set the list of forward classes.
718  void setClassList(ASTContext &C, ObjCInterfaceDecl*const*List, unsigned Num) {
719    ForwardDecls.set(List, Num, C);
720  }
721
722  static bool classof(const Decl *D) { return D->getKind() == ObjCClass; }
723  static bool classof(const ObjCClassDecl *D) { return true; }
724};
725
726/// ObjCForwardProtocolDecl - Specifies a list of forward protocol declarations.
727/// For example:
728///
729/// @protocol NSTextInput, NSChangeSpelling, NSDraggingInfo;
730///
731class ObjCForwardProtocolDecl : public Decl {
732  ObjCList<ObjCProtocolDecl> ReferencedProtocols;
733
734  ObjCForwardProtocolDecl(DeclContext *DC, SourceLocation L,
735                          ObjCProtocolDecl *const *Elts, unsigned nElts,
736                          ASTContext &C);
737  virtual ~ObjCForwardProtocolDecl() {}
738
739public:
740  static ObjCForwardProtocolDecl *Create(ASTContext &C, DeclContext *DC,
741                                         SourceLocation L,
742                                         ObjCProtocolDecl *const *Elts = 0,
743                                         unsigned Num = 0);
744
745  /// Destroy - Call destructors and release memory.
746  virtual void Destroy(ASTContext& C);
747
748  typedef ObjCList<ObjCProtocolDecl>::iterator protocol_iterator;
749  protocol_iterator protocol_begin() const {return ReferencedProtocols.begin();}
750  protocol_iterator protocol_end() const { return ReferencedProtocols.end(); }
751  unsigned protocol_size() const { return ReferencedProtocols.size(); }
752
753  /// setProtocolList - Set the list of forward protocols.
754  void setProtocolList(ObjCProtocolDecl *const*List, unsigned Num,
755                       ASTContext &C) {
756    ReferencedProtocols.set(List, Num, C);
757  }
758  static bool classof(const Decl *D) {
759    return D->getKind() == ObjCForwardProtocol;
760  }
761  static bool classof(const ObjCForwardProtocolDecl *D) { return true; }
762};
763
764/// ObjCCategoryDecl - Represents a category declaration. A category allows
765/// you to add methods to an existing class (without subclassing or modifying
766/// the original class interface or implementation:-). Categories don't allow
767/// you to add instance data. The following example adds "myMethod" to all
768/// NSView's within a process:
769///
770/// @interface NSView (MyViewMethods)
771/// - myMethod;
772/// @end
773///
774/// Cateogries also allow you to split the implementation of a class across
775/// several files (a feature more naturally supported in C++).
776///
777/// Categories were originally inspired by dynamic languages such as Common
778/// Lisp and Smalltalk.  More traditional class-based languages (C++, Java)
779/// don't support this level of dynamism, which is both powerful and dangerous.
780///
781class ObjCCategoryDecl : public ObjCContainerDecl {
782  /// Interface belonging to this category
783  ObjCInterfaceDecl *ClassInterface;
784
785  /// referenced protocols in this category.
786  ObjCList<ObjCProtocolDecl> ReferencedProtocols;
787
788  /// Next category belonging to this class.
789  /// FIXME: this should not be a singly-linked list.  Move storage elsewhere.
790  ObjCCategoryDecl *NextClassCategory;
791
792  SourceLocation EndLoc; // marks the '>' or identifier.
793
794  ObjCCategoryDecl(DeclContext *DC, SourceLocation L, IdentifierInfo *Id)
795    : ObjCContainerDecl(ObjCCategory, DC, L, Id),
796      ClassInterface(0), NextClassCategory(0){
797  }
798public:
799
800  static ObjCCategoryDecl *Create(ASTContext &C, DeclContext *DC,
801                                  SourceLocation L, IdentifierInfo *Id);
802
803  ObjCInterfaceDecl *getClassInterface() { return ClassInterface; }
804  const ObjCInterfaceDecl *getClassInterface() const { return ClassInterface; }
805  void setClassInterface(ObjCInterfaceDecl *IDecl) { ClassInterface = IDecl; }
806
807  ObjCCategoryImplDecl *getImplementation() const;
808  void setImplementation(ObjCCategoryImplDecl *ImplD);
809
810  /// setProtocolList - Set the list of protocols that this interface
811  /// implements.
812  void setProtocolList(ObjCProtocolDecl *const*List, unsigned Num,
813                              ASTContext &C) {
814    ReferencedProtocols.set(List, Num, C);
815  }
816
817  const ObjCList<ObjCProtocolDecl> &getReferencedProtocols() const {
818    return ReferencedProtocols;
819  }
820
821  typedef ObjCList<ObjCProtocolDecl>::iterator protocol_iterator;
822  protocol_iterator protocol_begin() const {return ReferencedProtocols.begin();}
823  protocol_iterator protocol_end() const { return ReferencedProtocols.end(); }
824  unsigned protocol_size() const { return ReferencedProtocols.size(); }
825
826  ObjCCategoryDecl *getNextClassCategory() const { return NextClassCategory; }
827  void setNextClassCategory(ObjCCategoryDecl *Cat) {
828    NextClassCategory = Cat;
829  }
830  void insertNextClassCategory() {
831    NextClassCategory = ClassInterface->getCategoryList();
832    ClassInterface->setCategoryList(this);
833  }
834  // Location information, modeled after the Stmt API.
835  SourceLocation getLocStart() const { return getLocation(); } // '@'interface
836  SourceLocation getLocEnd() const { return EndLoc; }
837  void setLocEnd(SourceLocation LE) { EndLoc = LE; };
838
839  static bool classof(const Decl *D) { return D->getKind() == ObjCCategory; }
840  static bool classof(const ObjCCategoryDecl *D) { return true; }
841};
842
843class ObjCImplDecl : public ObjCContainerDecl {
844  /// Class interface for this category implementation
845  ObjCInterfaceDecl *ClassInterface;
846
847protected:
848  ObjCImplDecl(Kind DK, DeclContext *DC, SourceLocation L,
849               ObjCInterfaceDecl *classInterface)
850    : ObjCContainerDecl(DK, DC, L,
851                        classInterface? classInterface->getIdentifier() : 0),
852      ClassInterface(classInterface) {}
853
854public:
855  virtual ~ObjCImplDecl() {}
856
857  const ObjCInterfaceDecl *getClassInterface() const { return ClassInterface; }
858  ObjCInterfaceDecl *getClassInterface() { return ClassInterface; }
859  void setClassInterface(ObjCInterfaceDecl *IFace);
860
861  void addInstanceMethod(ObjCMethodDecl *method) {
862    // FIXME: Context should be set correctly before we get here.
863    method->setLexicalDeclContext(this);
864    addDecl(method);
865  }
866  void addClassMethod(ObjCMethodDecl *method) {
867    // FIXME: Context should be set correctly before we get here.
868    method->setLexicalDeclContext(this);
869    addDecl(method);
870  }
871
872  void addPropertyImplementation(ObjCPropertyImplDecl *property);
873
874  ObjCPropertyImplDecl *FindPropertyImplDecl(IdentifierInfo *propertyId) const;
875  ObjCPropertyImplDecl *FindPropertyImplIvarDecl(IdentifierInfo *ivarId) const;
876
877  // Iterator access to properties.
878  typedef specific_decl_iterator<ObjCPropertyImplDecl> propimpl_iterator;
879  propimpl_iterator propimpl_begin() const {
880    return propimpl_iterator(decls_begin());
881  }
882  propimpl_iterator propimpl_end() const {
883    return propimpl_iterator(decls_end());
884  }
885
886  static bool classof(const Decl *D) {
887    return D->getKind() >= ObjCImplFirst && D->getKind() <= ObjCImplLast;
888  }
889  static bool classof(const ObjCImplDecl *D) { return true; }
890};
891
892/// ObjCCategoryImplDecl - An object of this class encapsulates a category
893/// @implementation declaration. If a category class has declaration of a
894/// property, its implementation must be specified in the category's
895/// @implementation declaration. Example:
896/// @interface I @end
897/// @interface I(CATEGORY)
898///    @property int p1, d1;
899/// @end
900/// @implementation I(CATEGORY)
901///  @dynamic p1,d1;
902/// @end
903///
904/// ObjCCategoryImplDecl
905class ObjCCategoryImplDecl : public ObjCImplDecl {
906  // Category name
907  IdentifierInfo *Id;
908
909  ObjCCategoryImplDecl(DeclContext *DC, SourceLocation L, IdentifierInfo *Id,
910                       ObjCInterfaceDecl *classInterface)
911    : ObjCImplDecl(ObjCCategoryImpl, DC, L, classInterface), Id(Id) {}
912public:
913  static ObjCCategoryImplDecl *Create(ASTContext &C, DeclContext *DC,
914                                      SourceLocation L, IdentifierInfo *Id,
915                                      ObjCInterfaceDecl *classInterface);
916
917  /// getIdentifier - Get the identifier that names the class
918  /// interface associated with this implementation.
919  IdentifierInfo *getIdentifier() const {
920    return Id;
921  }
922  void setIdentifier(IdentifierInfo *II) { Id = II; }
923
924  ObjCCategoryDecl *getCategoryClass() const;
925
926  /// getNameAsCString - Get the name of identifier for the class
927  /// interface associated with this implementation as a C string
928  /// (const char*).
929  const char *getNameAsCString() const {
930    return Id ? Id->getName() : "";
931  }
932
933  /// @brief Get the name of the class associated with this interface.
934  std::string getNameAsString() const {
935    return Id ? Id->getName() : "";
936  }
937
938  static bool classof(const Decl *D) { return D->getKind() == ObjCCategoryImpl;}
939  static bool classof(const ObjCCategoryImplDecl *D) { return true; }
940};
941
942/// ObjCImplementationDecl - Represents a class definition - this is where
943/// method definitions are specified. For example:
944///
945/// @code
946/// @implementation MyClass
947/// - (void)myMethod { /* do something */ }
948/// @end
949/// @endcode
950///
951/// Typically, instance variables are specified in the class interface,
952/// *not* in the implementation. Nevertheless (for legacy reasons), we
953/// allow instance variables to be specified in the implementation.  When
954/// specified, they need to be *identical* to the interface.
955///
956class ObjCImplementationDecl : public ObjCImplDecl {
957  /// Implementation Class's super class.
958  ObjCInterfaceDecl *SuperClass;
959
960  ObjCImplementationDecl(DeclContext *DC, SourceLocation L,
961                         ObjCInterfaceDecl *classInterface,
962                         ObjCInterfaceDecl *superDecl)
963    : ObjCImplDecl(ObjCImplementation, DC, L, classInterface),
964       SuperClass(superDecl){}
965public:
966  static ObjCImplementationDecl *Create(ASTContext &C, DeclContext *DC,
967                                        SourceLocation L,
968                                        ObjCInterfaceDecl *classInterface,
969                                        ObjCInterfaceDecl *superDecl);
970
971  /// getIdentifier - Get the identifier that names the class
972  /// interface associated with this implementation.
973  IdentifierInfo *getIdentifier() const {
974    return getClassInterface()->getIdentifier();
975  }
976
977  /// getNameAsCString - Get the name of identifier for the class
978  /// interface associated with this implementation as a C string
979  /// (const char*).
980  const char *getNameAsCString() const {
981    assert(getIdentifier() && "Name is not a simple identifier");
982    return getIdentifier()->getName();
983  }
984
985  /// @brief Get the name of the class associated with this interface.
986  std::string getNameAsString() const {
987    return getClassInterface()->getNameAsString();
988  }
989
990  const ObjCInterfaceDecl *getSuperClass() const { return SuperClass; }
991  ObjCInterfaceDecl *getSuperClass() { return SuperClass; }
992
993  void setSuperClass(ObjCInterfaceDecl * superCls) { SuperClass = superCls; }
994
995  typedef specific_decl_iterator<ObjCIvarDecl> ivar_iterator;
996  ivar_iterator ivar_begin() const {
997    return ivar_iterator(decls_begin());
998  }
999  ivar_iterator ivar_end() const {
1000    return ivar_iterator(decls_end());
1001  }
1002  unsigned ivar_size() const {
1003    return std::distance(ivar_begin(), ivar_end());
1004  }
1005  bool ivar_empty() const {
1006    return ivar_begin() == ivar_end();
1007  }
1008
1009  static bool classof(const Decl *D) {
1010    return D->getKind() == ObjCImplementation;
1011  }
1012  static bool classof(const ObjCImplementationDecl *D) { return true; }
1013};
1014
1015/// ObjCCompatibleAliasDecl - Represents alias of a class. This alias is
1016/// declared as @compatibility_alias alias class.
1017class ObjCCompatibleAliasDecl : public NamedDecl {
1018  /// Class that this is an alias of.
1019  ObjCInterfaceDecl *AliasedClass;
1020
1021  ObjCCompatibleAliasDecl(DeclContext *DC, SourceLocation L, IdentifierInfo *Id,
1022                          ObjCInterfaceDecl* aliasedClass)
1023    : NamedDecl(ObjCCompatibleAlias, DC, L, Id), AliasedClass(aliasedClass) {}
1024public:
1025  static ObjCCompatibleAliasDecl *Create(ASTContext &C, DeclContext *DC,
1026                                         SourceLocation L, IdentifierInfo *Id,
1027                                         ObjCInterfaceDecl* aliasedClass);
1028
1029  const ObjCInterfaceDecl *getClassInterface() const { return AliasedClass; }
1030  ObjCInterfaceDecl *getClassInterface() { return AliasedClass; }
1031  void setClassInterface(ObjCInterfaceDecl *D) { AliasedClass = D; }
1032
1033  static bool classof(const Decl *D) {
1034    return D->getKind() == ObjCCompatibleAlias;
1035  }
1036  static bool classof(const ObjCCompatibleAliasDecl *D) { return true; }
1037
1038};
1039
1040/// ObjCPropertyDecl - Represents one property declaration in an interface.
1041/// For example:
1042/// @property (assign, readwrite) int MyProperty;
1043///
1044class ObjCPropertyDecl : public NamedDecl {
1045public:
1046  enum PropertyAttributeKind {
1047    OBJC_PR_noattr    = 0x00,
1048    OBJC_PR_readonly  = 0x01,
1049    OBJC_PR_getter    = 0x02,
1050    OBJC_PR_assign    = 0x04,
1051    OBJC_PR_readwrite = 0x08,
1052    OBJC_PR_retain    = 0x10,
1053    OBJC_PR_copy      = 0x20,
1054    OBJC_PR_nonatomic = 0x40,
1055    OBJC_PR_setter    = 0x80
1056  };
1057
1058  enum SetterKind { Assign, Retain, Copy };
1059  enum PropertyControl { None, Required, Optional };
1060private:
1061  QualType DeclType;
1062  unsigned PropertyAttributes : 8;
1063
1064  // @required/@optional
1065  unsigned PropertyImplementation : 2;
1066
1067  Selector GetterName;    // getter name of NULL if no getter
1068  Selector SetterName;    // setter name of NULL if no setter
1069
1070  ObjCMethodDecl *GetterMethodDecl; // Declaration of getter instance method
1071  ObjCMethodDecl *SetterMethodDecl; // Declaration of setter instance method
1072  ObjCIvarDecl *PropertyIvarDecl;   // Synthesize ivar for this property
1073
1074  ObjCPropertyDecl(DeclContext *DC, SourceLocation L, IdentifierInfo *Id,
1075                   QualType T)
1076    : NamedDecl(ObjCProperty, DC, L, Id), DeclType(T),
1077      PropertyAttributes(OBJC_PR_noattr), PropertyImplementation(None),
1078      GetterName(Selector()),
1079      SetterName(Selector()),
1080      GetterMethodDecl(0), SetterMethodDecl(0) , PropertyIvarDecl(0) {}
1081public:
1082  static ObjCPropertyDecl *Create(ASTContext &C, DeclContext *DC,
1083                                  SourceLocation L,
1084                                  IdentifierInfo *Id, QualType T,
1085                                  PropertyControl propControl = None);
1086  QualType getType() const { return DeclType; }
1087  void setType(QualType T) { DeclType = T; }
1088
1089  PropertyAttributeKind getPropertyAttributes() const {
1090    return PropertyAttributeKind(PropertyAttributes);
1091  }
1092  void setPropertyAttributes(PropertyAttributeKind PRVal) {
1093    PropertyAttributes |= PRVal;
1094  }
1095
1096 void makeitReadWriteAttribute(void) {
1097    PropertyAttributes &= ~OBJC_PR_readonly;
1098    PropertyAttributes |= OBJC_PR_readwrite;
1099 }
1100
1101  // Helper methods for accessing attributes.
1102
1103  /// isReadOnly - Return true iff the property has a setter.
1104  bool isReadOnly() const {
1105    return (PropertyAttributes & OBJC_PR_readonly);
1106  }
1107
1108  /// getSetterKind - Return the method used for doing assignment in
1109  /// the property setter. This is only valid if the property has been
1110  /// defined to have a setter.
1111  SetterKind getSetterKind() const {
1112    if (PropertyAttributes & OBJC_PR_retain)
1113      return Retain;
1114    if (PropertyAttributes & OBJC_PR_copy)
1115      return Copy;
1116    return Assign;
1117  }
1118
1119  Selector getGetterName() const { return GetterName; }
1120  void setGetterName(Selector Sel) { GetterName = Sel; }
1121
1122  Selector getSetterName() const { return SetterName; }
1123  void setSetterName(Selector Sel) { SetterName = Sel; }
1124
1125  ObjCMethodDecl *getGetterMethodDecl() const { return GetterMethodDecl; }
1126  void setGetterMethodDecl(ObjCMethodDecl *gDecl) { GetterMethodDecl = gDecl; }
1127
1128  ObjCMethodDecl *getSetterMethodDecl() const { return SetterMethodDecl; }
1129  void setSetterMethodDecl(ObjCMethodDecl *gDecl) { SetterMethodDecl = gDecl; }
1130
1131  // Related to @optional/@required declared in @protocol
1132  void setPropertyImplementation(PropertyControl pc) {
1133    PropertyImplementation = pc;
1134  }
1135  PropertyControl getPropertyImplementation() const {
1136    return PropertyControl(PropertyImplementation);
1137  }
1138
1139  void setPropertyIvarDecl(ObjCIvarDecl *Ivar) {
1140    PropertyIvarDecl = Ivar;
1141  }
1142  ObjCIvarDecl *getPropertyIvarDecl() const {
1143    return PropertyIvarDecl;
1144  }
1145
1146  static bool classof(const Decl *D) {
1147    return D->getKind() == ObjCProperty;
1148  }
1149  static bool classof(const ObjCPropertyDecl *D) { return true; }
1150};
1151
1152/// ObjCPropertyImplDecl - Represents implementation declaration of a property
1153/// in a class or category implementation block. For example:
1154/// @synthesize prop1 = ivar1;
1155///
1156class ObjCPropertyImplDecl : public Decl {
1157public:
1158  enum Kind {
1159    Synthesize,
1160    Dynamic
1161  };
1162private:
1163  SourceLocation AtLoc;   // location of @synthesize or @dynamic
1164  /// Property declaration being implemented
1165  ObjCPropertyDecl *PropertyDecl;
1166
1167  /// Null for @dynamic. Required for @synthesize.
1168  ObjCIvarDecl *PropertyIvarDecl;
1169
1170  ObjCPropertyImplDecl(DeclContext *DC, SourceLocation atLoc, SourceLocation L,
1171                       ObjCPropertyDecl *property,
1172                       Kind PK,
1173                       ObjCIvarDecl *ivarDecl)
1174    : Decl(ObjCPropertyImpl, DC, L), AtLoc(atLoc),
1175      PropertyDecl(property), PropertyIvarDecl(ivarDecl) {
1176    assert (PK == Dynamic || PropertyIvarDecl);
1177  }
1178
1179public:
1180  static ObjCPropertyImplDecl *Create(ASTContext &C, DeclContext *DC,
1181                                      SourceLocation atLoc, SourceLocation L,
1182                                      ObjCPropertyDecl *property,
1183                                      Kind PK,
1184                                      ObjCIvarDecl *ivarDecl);
1185
1186  virtual SourceRange getSourceRange() const {
1187    return SourceRange(AtLoc, getLocation());
1188  }
1189  SourceLocation getLocStart() const { return AtLoc; }
1190  void setAtLoc(SourceLocation Loc) { AtLoc = Loc; }
1191
1192  ObjCPropertyDecl *getPropertyDecl() const {
1193    return PropertyDecl;
1194  }
1195  void setPropertyDecl(ObjCPropertyDecl *Prop) { PropertyDecl = Prop; }
1196
1197  Kind getPropertyImplementation() const {
1198    return PropertyIvarDecl ? Synthesize : Dynamic;
1199  }
1200
1201  ObjCIvarDecl *getPropertyIvarDecl() const {
1202    return PropertyIvarDecl;
1203  }
1204  void setPropertyIvarDecl(ObjCIvarDecl *Ivar) { PropertyIvarDecl = Ivar; }
1205
1206  static bool classof(const Decl *D) {
1207    return D->getKind() == ObjCPropertyImpl;
1208  }
1209  static bool classof(const ObjCPropertyImplDecl *D) { return true; }
1210};
1211
1212}  // end namespace clang
1213#endif
1214