DeclObjC.h revision 28e71cf851b73a67604735a9a95aef800b144e2e 
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
158public:
159
160  /// Destroy - Call destructors and release memory.
161  virtual void Destroy(ASTContext& C);
162
163  static ObjCMethodDecl *Create(ASTContext &C,
164                                SourceLocation beginLoc,
165                                SourceLocation endLoc, Selector SelInfo,
166                                QualType T, DeclContext *contextDecl,
167                                bool isInstance = true,
168                                bool isVariadic = false,
169                                bool isSynthesized = false,
170                                ImplementationControl impControl = None);
171
172  ObjCDeclQualifier getObjCDeclQualifier() const {
173    return ObjCDeclQualifier(objcDeclQualifier);
174  }
175  void setObjCDeclQualifier(ObjCDeclQualifier QV) { objcDeclQualifier = QV; }
176
177  // Location information, modeled after the Stmt API.
178  SourceLocation getLocStart() const { return getLocation(); }
179  SourceLocation getLocEnd() const { return EndLoc; }
180  void setEndLoc(SourceLocation Loc) { EndLoc = Loc; }
181  SourceRange getSourceRange() const {
182    return SourceRange(getLocation(), EndLoc);
183  }
184
185  ObjCInterfaceDecl *getClassInterface();
186  const ObjCInterfaceDecl *getClassInterface() const {
187    return const_cast<ObjCMethodDecl*>(this)->getClassInterface();
188  }
189
190  Selector getSelector() const { return getDeclName().getObjCSelector(); }
191  unsigned getSynthesizedMethodSize() const;
192  QualType getResultType() const { return MethodDeclType; }
193  void setResultType(QualType T) { MethodDeclType = T; }
194
195  // Iterator access to formal parameters.
196  unsigned param_size() const { return ParamInfo.size(); }
197  typedef ObjCList<ParmVarDecl>::iterator param_iterator;
198  param_iterator param_begin() const { return ParamInfo.begin(); }
199  param_iterator param_end() const { return ParamInfo.end(); }
200
201  void setMethodParams(ASTContext &C, ParmVarDecl *const *List, unsigned Num) {
202    ParamInfo.set(List, Num, C);
203  }
204
205  // Iterator access to parameter types.
206  typedef std::const_mem_fun_t<QualType, ParmVarDecl> deref_fun;
207  typedef llvm::mapped_iterator<param_iterator, deref_fun> arg_type_iterator;
208
209  arg_type_iterator arg_type_begin() const {
210    return llvm::map_iterator(param_begin(), deref_fun(&ParmVarDecl::getType));
211  }
212  arg_type_iterator arg_type_end() const {
213    return llvm::map_iterator(param_end(), deref_fun(&ParmVarDecl::getType));
214  }
215
216  /// createImplicitParams - Used to lazily create the self and cmd
217  /// implict parameters. This must be called prior to using getSelfDecl()
218  /// or getCmdDecl(). The call is ignored if the implicit paramters
219  /// have already been created.
220  void createImplicitParams(ASTContext &Context, const ObjCInterfaceDecl *ID);
221
222  ImplicitParamDecl * getSelfDecl() const { return SelfDecl; }
223  void setSelfDecl(ImplicitParamDecl *SD) { SelfDecl = SD; }
224  ImplicitParamDecl * getCmdDecl() const { return CmdDecl; }
225  void setCmdDecl(ImplicitParamDecl *CD) { CmdDecl = CD; }
226
227  bool isInstanceMethod() const { return IsInstance; }
228  void setInstanceMethod(bool isInst) { IsInstance = isInst; }
229  bool isVariadic() const { return IsVariadic; }
230  void setVariadic(bool isVar) { IsVariadic = isVar; }
231
232  bool isClassMethod() const { return !IsInstance; }
233
234  bool isSynthesized() const { return IsSynthesized; }
235  void setSynthesized(bool isSynth) { IsSynthesized = isSynth; }
236
237  // Related to protocols declared in  @protocol
238  void setDeclImplementation(ImplementationControl ic) {
239    DeclImplementation = ic;
240  }
241  ImplementationControl getImplementationControl() const {
242    return ImplementationControl(DeclImplementation);
243  }
244
245  virtual CompoundStmt *getBody(ASTContext &C) const {
246    return (CompoundStmt*) Body;
247  }
248  CompoundStmt *getBody() { return (CompoundStmt*)Body; }
249  void setBody(CompoundStmt *B) { Body = (Stmt*) B; }
250
251  // Implement isa/cast/dyncast/etc.
252  static bool classof(const Decl *D) { return D->getKind() == ObjCMethod; }
253  static bool classof(const ObjCMethodDecl *D) { return true; }
254  static DeclContext *castToDeclContext(const ObjCMethodDecl *D) {
255    return static_cast<DeclContext *>(const_cast<ObjCMethodDecl*>(D));
256  }
257  static ObjCMethodDecl *castFromDeclContext(const DeclContext *DC) {
258    return static_cast<ObjCMethodDecl *>(const_cast<DeclContext*>(DC));
259  }
260};
261
262/// ObjCContainerDecl - Represents a container for method declarations.
263/// Current sub-classes are ObjCInterfaceDecl, ObjCCategoryDecl, and
264/// ObjCProtocolDecl.
265/// FIXME: Use for ObjC implementation decls.
266///
267class ObjCContainerDecl : public NamedDecl, public DeclContext {
268  SourceLocation AtEndLoc; // marks the end of the method container.
269public:
270
271  ObjCContainerDecl(Kind DK, DeclContext *DC, SourceLocation L,
272                    IdentifierInfo *Id)
273    : NamedDecl(DK, DC, L, Id), DeclContext(DK) {}
274
275  virtual ~ObjCContainerDecl() {}
276
277  // Iterator access to properties.
278  typedef specific_decl_iterator<ObjCPropertyDecl> prop_iterator;
279  prop_iterator prop_begin(ASTContext &Context) const {
280    return prop_iterator(decls_begin(Context));
281  }
282  prop_iterator prop_end(ASTContext &Context) const {
283    return prop_iterator(decls_end(Context));
284  }
285
286  // Iterator access to instance/class methods.
287  typedef specific_decl_iterator<ObjCMethodDecl> method_iterator;
288  method_iterator meth_begin(ASTContext &Context) const {
289    return method_iterator(decls_begin(Context));
290  }
291  method_iterator meth_end(ASTContext &Context) const {
292    return method_iterator(decls_end(Context));
293  }
294
295  typedef filtered_decl_iterator<ObjCMethodDecl,
296                                 &ObjCMethodDecl::isInstanceMethod>
297    instmeth_iterator;
298  instmeth_iterator instmeth_begin(ASTContext &Context) const {
299    return instmeth_iterator(decls_begin(Context));
300  }
301  instmeth_iterator instmeth_end(ASTContext &Context) const {
302    return instmeth_iterator(decls_end(Context));
303  }
304
305  typedef filtered_decl_iterator<ObjCMethodDecl,
306                                 &ObjCMethodDecl::isClassMethod>
307    classmeth_iterator;
308  classmeth_iterator classmeth_begin(ASTContext &Context) const {
309    return classmeth_iterator(decls_begin(Context));
310  }
311  classmeth_iterator classmeth_end(ASTContext &Context) const {
312    return classmeth_iterator(decls_end(Context));
313  }
314
315  // Get the local instance/class method declared in this interface.
316  ObjCMethodDecl *getInstanceMethod(ASTContext &Context, Selector Sel) const;
317  ObjCMethodDecl *getClassMethod(ASTContext &Context, Selector Sel) const;
318
319  ObjCMethodDecl *
320  getMethod(ASTContext &Context, Selector Sel, bool isInstance) const {
321    return isInstance ? getInstanceMethod(Context, Sel)
322                      : getClassMethod(Context, Sel);
323  }
324
325  ObjCPropertyDecl *FindPropertyDeclaration(ASTContext &Context,
326                                            IdentifierInfo *PropertyId) const;
327
328  // Marks the end of the container.
329  SourceLocation getAtEndLoc() const { return AtEndLoc; }
330  void setAtEndLoc(SourceLocation L) { AtEndLoc = L; }
331
332  // Implement isa/cast/dyncast/etc.
333  static bool classof(const Decl *D) {
334    return D->getKind() >= ObjCContainerFirst &&
335           D->getKind() <= ObjCContainerLast;
336  }
337  static bool classof(const ObjCContainerDecl *D) { return true; }
338
339  static DeclContext *castToDeclContext(const ObjCContainerDecl *D) {
340    return static_cast<DeclContext *>(const_cast<ObjCContainerDecl*>(D));
341  }
342  static ObjCContainerDecl *castFromDeclContext(const DeclContext *DC) {
343    return static_cast<ObjCContainerDecl *>(const_cast<DeclContext*>(DC));
344  }
345};
346
347/// ObjCInterfaceDecl - Represents an ObjC class declaration. For example:
348///
349///   // MostPrimitive declares no super class (not particularly useful).
350///   @interface MostPrimitive
351///     // no instance variables or methods.
352///   @end
353///
354///   // NSResponder inherits from NSObject & implements NSCoding (a protocol).
355///   @interface NSResponder : NSObject <NSCoding>
356///   { // instance variables are represented by ObjCIvarDecl.
357///     id nextResponder; // nextResponder instance variable.
358///   }
359///   - (NSResponder *)nextResponder; // return a pointer to NSResponder.
360///   - (void)mouseMoved:(NSEvent *)theEvent; // return void, takes a pointer
361///   @end                                    // to an NSEvent.
362///
363///   Unlike C/C++, forward class declarations are accomplished with @class.
364///   Unlike C/C++, @class allows for a list of classes to be forward declared.
365///   Unlike C++, ObjC is a single-rooted class model. In Cocoa, classes
366///   typically inherit from NSObject (an exception is NSProxy).
367///
368class ObjCInterfaceDecl : public ObjCContainerDecl {
369  /// TypeForDecl - This indicates the Type object that represents this
370  /// TypeDecl.  It is a cache maintained by ASTContext::getObjCInterfaceType
371  Type *TypeForDecl;
372  friend class ASTContext;
373
374  /// Class's super class.
375  ObjCInterfaceDecl *SuperClass;
376
377  /// Protocols referenced in interface header declaration
378  ObjCList<ObjCProtocolDecl> ReferencedProtocols;
379
380  /// Instance variables in the interface.
381  ObjCList<ObjCIvarDecl> IVars;
382
383  /// List of categories defined for this class.
384  /// FIXME: Why is this a linked list??
385  ObjCCategoryDecl *CategoryList;
386
387  bool ForwardDecl:1; // declared with @class.
388  bool InternalInterface:1; // true - no @interface for @implementation
389
390  SourceLocation ClassLoc; // location of the class identifier.
391  SourceLocation SuperClassLoc; // location of the super class identifier.
392  SourceLocation EndLoc; // marks the '>', '}', or identifier.
393
394  ObjCInterfaceDecl(DeclContext *DC, SourceLocation atLoc, IdentifierInfo *Id,
395                    SourceLocation CLoc, bool FD, bool isInternal);
396
397  virtual ~ObjCInterfaceDecl() {}
398
399public:
400
401  /// Destroy - Call destructors and release memory.
402  virtual void Destroy(ASTContext& C);
403
404  static ObjCInterfaceDecl *Create(ASTContext &C, DeclContext *DC,
405                                   SourceLocation atLoc,
406                                   IdentifierInfo *Id,
407                                   SourceLocation ClassLoc = SourceLocation(),
408                                   bool ForwardDecl = false,
409                                   bool isInternal = false);
410  const ObjCList<ObjCProtocolDecl> &getReferencedProtocols() const {
411    return ReferencedProtocols;
412  }
413
414  ObjCCategoryDecl *FindCategoryDeclaration(IdentifierInfo *CategoryId) const;
415
416  typedef ObjCList<ObjCProtocolDecl>::iterator protocol_iterator;
417  protocol_iterator protocol_begin() const {return ReferencedProtocols.begin();}
418  protocol_iterator protocol_end() const { return ReferencedProtocols.end(); }
419
420  typedef ObjCList<ObjCIvarDecl>::iterator ivar_iterator;
421  ivar_iterator ivar_begin() const { return IVars.begin(); }
422  ivar_iterator ivar_end() const { return IVars.end(); }
423  unsigned ivar_size() const { return IVars.size(); }
424  bool ivar_empty() const { return IVars.empty(); }
425
426  /// setProtocolList - Set the list of protocols that this interface
427  /// implements.
428  void setProtocolList(ObjCProtocolDecl *const* List, unsigned Num,
429                       ASTContext &C) {
430    ReferencedProtocols.set(List, Num, C);
431  }
432
433  void setIVarList(ObjCIvarDecl * const *List, unsigned Num, ASTContext &C) {
434    IVars.set(List, Num, C);
435  }
436
437  const FieldDecl *lookupFieldDeclForIvar(ASTContext &Ctx,
438                                          const ObjCIvarDecl *IV) const;
439
440  bool isForwardDecl() const { return ForwardDecl; }
441  void setForwardDecl(bool val) { ForwardDecl = val; }
442
443  ObjCInterfaceDecl *getSuperClass() const { return SuperClass; }
444  void setSuperClass(ObjCInterfaceDecl * superCls) { SuperClass = superCls; }
445
446  ObjCCategoryDecl* getCategoryList() const { return CategoryList; }
447  void setCategoryList(ObjCCategoryDecl *category) {
448    CategoryList = category;
449  }
450
451  /// isSuperClassOf - Return true if this class is the specified class or is a
452  /// super class of the specified interface class.
453  bool isSuperClassOf(const ObjCInterfaceDecl *I) const {
454    // If RHS is derived from LHS it is OK; else it is not OK.
455    while (I != NULL) {
456      if (this == I)
457        return true;
458      I = I->getSuperClass();
459    }
460    return false;
461  }
462
463  ObjCIvarDecl *lookupInstanceVariable(ASTContext &Context,
464                                       IdentifierInfo *IVarName,
465                                       ObjCInterfaceDecl *&ClassDeclared);
466  ObjCIvarDecl *lookupInstanceVariable(ASTContext &Context,
467                                       IdentifierInfo *IVarName) {
468    ObjCInterfaceDecl *ClassDeclared;
469    return lookupInstanceVariable(Context, IVarName, ClassDeclared);
470  }
471
472  // Lookup a method. First, we search locally. If a method isn't
473  // found, we search referenced protocols and class categories.
474  ObjCMethodDecl *lookupInstanceMethod(ASTContext &Context, Selector Sel);
475  ObjCMethodDecl *lookupClassMethod(ASTContext &Context, Selector Sel);
476
477  // Location information, modeled after the Stmt API.
478  SourceLocation getLocStart() const { return getLocation(); } // '@'interface
479  SourceLocation getLocEnd() const { return EndLoc; }
480  void setLocEnd(SourceLocation LE) { EndLoc = LE; };
481
482  void setClassLoc(SourceLocation Loc) { ClassLoc = Loc; }
483  SourceLocation getClassLoc() const { return ClassLoc; }
484  void setSuperClassLoc(SourceLocation Loc) { SuperClassLoc = Loc; }
485  SourceLocation getSuperClassLoc() const { return SuperClassLoc; }
486
487  /// isImplicitInterfaceDecl - check that this is an implicitly declared
488  /// ObjCInterfaceDecl node. This is for legacy objective-c @implementation
489  /// declaration without an @interface declaration.
490  bool isImplicitInterfaceDecl() const { return InternalInterface; }
491  void setImplicitInterfaceDecl(bool val) { InternalInterface = val; }
492
493  // Low-level accessor
494  Type *getTypeForDecl() const { return TypeForDecl; }
495  void setTypeForDecl(Type *TD) { TypeForDecl = TD; }
496
497  static bool classof(const Decl *D) { return D->getKind() == ObjCInterface; }
498  static bool classof(const ObjCInterfaceDecl *D) { return true; }
499};
500
501/// ObjCIvarDecl - Represents an ObjC instance variable. In general, ObjC
502/// instance variables are identical to C. The only exception is Objective-C
503/// supports C++ style access control. For example:
504///
505///   @interface IvarExample : NSObject
506///   {
507///     id defaultToProtected;
508///   @public:
509///     id canBePublic; // same as C++.
510///   @protected:
511///     id canBeProtected; // same as C++.
512///   @package:
513///     id canBePackage; // framework visibility (not available in C++).
514///   }
515///
516class ObjCIvarDecl : public FieldDecl {
517public:
518  enum AccessControl {
519    None, Private, Protected, Public, Package
520  };
521
522private:
523  ObjCIvarDecl(DeclContext *DC, SourceLocation L, IdentifierInfo *Id,
524               QualType T, AccessControl ac, Expr *BW)
525    : FieldDecl(ObjCIvar, DC, L, Id, T, BW, /*Mutable=*/false),
526      DeclAccess(ac) {}
527
528public:
529  static ObjCIvarDecl *Create(ASTContext &C, DeclContext *DC, SourceLocation L,
530                              IdentifierInfo *Id, QualType T,
531                              AccessControl ac, Expr *BW = NULL);
532
533  void setAccessControl(AccessControl ac) { DeclAccess = ac; }
534
535  AccessControl getAccessControl() const { return AccessControl(DeclAccess); }
536
537  AccessControl getCanonicalAccessControl() const {
538    return DeclAccess == None ? Protected : AccessControl(DeclAccess);
539  }
540
541  // Implement isa/cast/dyncast/etc.
542  static bool classof(const Decl *D) { return D->getKind() == ObjCIvar; }
543  static bool classof(const ObjCIvarDecl *D) { return true; }
544private:
545  // NOTE: VC++ treats enums as signed, avoid using the AccessControl enum
546  unsigned DeclAccess : 3;
547};
548
549
550/// ObjCAtDefsFieldDecl - Represents a field declaration created by an
551///  @defs(...).
552class ObjCAtDefsFieldDecl : public FieldDecl {
553private:
554  ObjCAtDefsFieldDecl(DeclContext *DC, SourceLocation L, IdentifierInfo *Id,
555                      QualType T, Expr *BW)
556    : FieldDecl(ObjCAtDefsField, DC, L, Id, T, BW, /*Mutable=*/false) {}
557
558public:
559  static ObjCAtDefsFieldDecl *Create(ASTContext &C, DeclContext *DC,
560                                     SourceLocation L,
561                                     IdentifierInfo *Id, QualType T,
562                                     Expr *BW);
563
564  virtual void Destroy(ASTContext& C);
565
566  // Implement isa/cast/dyncast/etc.
567  static bool classof(const Decl *D) { return D->getKind() == ObjCAtDefsField; }
568  static bool classof(const ObjCAtDefsFieldDecl *D) { return true; }
569};
570
571/// ObjCProtocolDecl - Represents a protocol declaration. ObjC protocols
572/// declare a pure abstract type (i.e no instance variables are permitted).
573/// Protocols orginally drew inspiration from C++ pure virtual functions (a C++
574/// feature with nice semantics and lousy syntax:-). Here is an example:
575///
576/// @protocol NSDraggingInfo <refproto1, refproto2>
577/// - (NSWindow *)draggingDestinationWindow;
578/// - (NSImage *)draggedImage;
579/// @end
580///
581/// This says that NSDraggingInfo requires two methods and requires everything
582/// that the two "referenced protocols" 'refproto1' and 'refproto2' require as
583/// well.
584///
585/// @interface ImplementsNSDraggingInfo : NSObject <NSDraggingInfo>
586/// @end
587///
588/// ObjC protocols inspired Java interfaces. Unlike Java, ObjC classes and
589/// protocols are in distinct namespaces. For example, Cocoa defines both
590/// an NSObject protocol and class (which isn't allowed in Java). As a result,
591/// protocols are referenced using angle brackets as follows:
592///
593/// id <NSDraggingInfo> anyObjectThatImplementsNSDraggingInfo;
594///
595class ObjCProtocolDecl : public ObjCContainerDecl {
596  /// Referenced protocols
597  ObjCList<ObjCProtocolDecl> ReferencedProtocols;
598
599  bool isForwardProtoDecl; // declared with @protocol.
600
601  SourceLocation EndLoc; // marks the '>' or identifier.
602  SourceLocation AtEndLoc; // marks the end of the entire interface.
603
604  ObjCProtocolDecl(DeclContext *DC, SourceLocation L, IdentifierInfo *Id)
605    : ObjCContainerDecl(ObjCProtocol, DC, L, Id),
606      isForwardProtoDecl(true) {
607  }
608
609  virtual ~ObjCProtocolDecl() {}
610
611public:
612  static ObjCProtocolDecl *Create(ASTContext &C, DeclContext *DC,
613                                  SourceLocation L, IdentifierInfo *Id);
614
615  /// Destroy - Call destructors and release memory.
616  virtual void Destroy(ASTContext& C);
617
618  const ObjCList<ObjCProtocolDecl> &getReferencedProtocols() const {
619    return ReferencedProtocols;
620  }
621  typedef ObjCList<ObjCProtocolDecl>::iterator protocol_iterator;
622  protocol_iterator protocol_begin() const {return ReferencedProtocols.begin();}
623  protocol_iterator protocol_end() const { return ReferencedProtocols.end(); }
624
625  /// setProtocolList - Set the list of protocols that this interface
626  /// implements.
627  void setProtocolList(ObjCProtocolDecl *const*List, unsigned Num,
628                       ASTContext &C) {
629    ReferencedProtocols.set(List, Num, C);
630  }
631
632  ObjCProtocolDecl *lookupProtocolNamed(IdentifierInfo *PName);
633
634  // Lookup a method. First, we search locally. If a method isn't
635  // found, we search referenced protocols and class categories.
636  ObjCMethodDecl *lookupInstanceMethod(ASTContext &Context, Selector Sel);
637  ObjCMethodDecl *lookupClassMethod(ASTContext &Context, Selector Sel);
638
639  bool isForwardDecl() const { return isForwardProtoDecl; }
640  void setForwardDecl(bool val) { isForwardProtoDecl = val; }
641
642  // Location information, modeled after the Stmt API.
643  SourceLocation getLocStart() const { return getLocation(); } // '@'protocol
644  SourceLocation getLocEnd() const { return EndLoc; }
645  void setLocEnd(SourceLocation LE) { EndLoc = LE; };
646
647  static bool classof(const Decl *D) { return D->getKind() == ObjCProtocol; }
648  static bool classof(const ObjCProtocolDecl *D) { return true; }
649};
650
651/// ObjCClassDecl - Specifies a list of forward class declarations. For example:
652///
653/// @class NSCursor, NSImage, NSPasteboard, NSWindow;
654///
655class ObjCClassDecl : public Decl {
656  ObjCList<ObjCInterfaceDecl> ForwardDecls;
657
658  ObjCClassDecl(DeclContext *DC, SourceLocation L,
659                ObjCInterfaceDecl *const *Elts, unsigned nElts, ASTContext &C);
660  virtual ~ObjCClassDecl() {}
661public:
662
663  /// Destroy - Call destructors and release memory.
664  virtual void Destroy(ASTContext& C);
665
666  static ObjCClassDecl *Create(ASTContext &C, DeclContext *DC, SourceLocation L,
667                               ObjCInterfaceDecl *const *Elts, unsigned nElts);
668
669  typedef ObjCList<ObjCInterfaceDecl>::iterator iterator;
670  iterator begin() const { return ForwardDecls.begin(); }
671  iterator end() const { return ForwardDecls.end(); }
672
673  static bool classof(const Decl *D) { return D->getKind() == ObjCClass; }
674  static bool classof(const ObjCClassDecl *D) { return true; }
675};
676
677/// ObjCForwardProtocolDecl - Specifies a list of forward protocol declarations.
678/// For example:
679///
680/// @protocol NSTextInput, NSChangeSpelling, NSDraggingInfo;
681///
682class ObjCForwardProtocolDecl : public Decl {
683  ObjCList<ObjCProtocolDecl> ReferencedProtocols;
684
685  ObjCForwardProtocolDecl(DeclContext *DC, SourceLocation L,
686                          ObjCProtocolDecl *const *Elts, unsigned nElts,
687                          ASTContext &C);
688  virtual ~ObjCForwardProtocolDecl() {}
689
690public:
691  static ObjCForwardProtocolDecl *Create(ASTContext &C, DeclContext *DC,
692                                         SourceLocation L,
693                                         ObjCProtocolDecl *const *Elts,
694                                         unsigned Num);
695
696  /// Destroy - Call destructors and release memory.
697  virtual void Destroy(ASTContext& C);
698
699  typedef ObjCList<ObjCProtocolDecl>::iterator iterator;
700  iterator begin() const { return ReferencedProtocols.begin(); }
701  iterator end() const { return ReferencedProtocols.end(); }
702
703  static bool classof(const Decl *D) {
704    return D->getKind() == ObjCForwardProtocol;
705  }
706  static bool classof(const ObjCForwardProtocolDecl *D) { return true; }
707};
708
709/// ObjCCategoryDecl - Represents a category declaration. A category allows
710/// you to add methods to an existing class (without subclassing or modifying
711/// the original class interface or implementation:-). Categories don't allow
712/// you to add instance data. The following example adds "myMethod" to all
713/// NSView's within a process:
714///
715/// @interface NSView (MyViewMethods)
716/// - myMethod;
717/// @end
718///
719/// Cateogries also allow you to split the implementation of a class across
720/// several files (a feature more naturally supported in C++).
721///
722/// Categories were originally inspired by dynamic languages such as Common
723/// Lisp and Smalltalk.  More traditional class-based languages (C++, Java)
724/// don't support this level of dynamism, which is both powerful and dangerous.
725///
726class ObjCCategoryDecl : public ObjCContainerDecl {
727  /// Interface belonging to this category
728  ObjCInterfaceDecl *ClassInterface;
729
730  /// referenced protocols in this category.
731  ObjCList<ObjCProtocolDecl> ReferencedProtocols;
732
733  /// Next category belonging to this class.
734  /// FIXME: this should not be a singly-linked list.  Move storage elsewhere.
735  ObjCCategoryDecl *NextClassCategory;
736
737  SourceLocation EndLoc; // marks the '>' or identifier.
738
739  ObjCCategoryDecl(DeclContext *DC, SourceLocation L, IdentifierInfo *Id)
740    : ObjCContainerDecl(ObjCCategory, DC, L, Id),
741      ClassInterface(0), NextClassCategory(0){
742  }
743public:
744
745  static ObjCCategoryDecl *Create(ASTContext &C, DeclContext *DC,
746                                  SourceLocation L, IdentifierInfo *Id);
747
748  ObjCInterfaceDecl *getClassInterface() { return ClassInterface; }
749  const ObjCInterfaceDecl *getClassInterface() const { return ClassInterface; }
750  void setClassInterface(ObjCInterfaceDecl *IDecl) { ClassInterface = IDecl; }
751
752  /// setProtocolList - Set the list of protocols that this interface
753  /// implements.
754  void setProtocolList(ObjCProtocolDecl *const*List, unsigned Num,
755                              ASTContext &C) {
756    ReferencedProtocols.set(List, Num, C);
757  }
758
759  const ObjCList<ObjCProtocolDecl> &getReferencedProtocols() const {
760    return ReferencedProtocols;
761  }
762
763  typedef ObjCList<ObjCProtocolDecl>::iterator protocol_iterator;
764  protocol_iterator protocol_begin() const {return ReferencedProtocols.begin();}
765  protocol_iterator protocol_end() const { return ReferencedProtocols.end(); }
766
767  ObjCCategoryDecl *getNextClassCategory() const { return NextClassCategory; }
768  void insertNextClassCategory() {
769    NextClassCategory = ClassInterface->getCategoryList();
770    ClassInterface->setCategoryList(this);
771  }
772  // Location information, modeled after the Stmt API.
773  SourceLocation getLocStart() const { return getLocation(); } // '@'interface
774  SourceLocation getLocEnd() const { return EndLoc; }
775  void setLocEnd(SourceLocation LE) { EndLoc = LE; };
776
777  static bool classof(const Decl *D) { return D->getKind() == ObjCCategory; }
778  static bool classof(const ObjCCategoryDecl *D) { return true; }
779};
780
781class ObjCImplDecl : public Decl, public DeclContext {
782  /// Class interface for this category implementation
783  ObjCInterfaceDecl *ClassInterface;
784
785  /// implemented instance methods
786  llvm::SmallVector<ObjCMethodDecl*, 16> InstanceMethods;
787
788  /// implemented class methods
789  llvm::SmallVector<ObjCMethodDecl*, 16> ClassMethods;
790
791  /// Property Implementations in this category
792  llvm::SmallVector<ObjCPropertyImplDecl*, 8> PropertyImplementations;
793
794  SourceLocation EndLoc;
795
796protected:
797  ObjCImplDecl(Kind DK, DeclContext *DC, SourceLocation L,
798               ObjCInterfaceDecl *classInterface)
799      : Decl(DK, DC, L), DeclContext(DK),
800        ClassInterface(classInterface) {}
801
802public:
803  virtual ~ObjCImplDecl() {}
804
805  const ObjCInterfaceDecl *getClassInterface() const { return ClassInterface; }
806  ObjCInterfaceDecl *getClassInterface() { return ClassInterface; }
807
808  void addInstanceMethod(ObjCMethodDecl *method) {
809    InstanceMethods.push_back(method);
810  }
811  void addClassMethod(ObjCMethodDecl *method) {
812    ClassMethods.push_back(method);
813  }
814
815  // Get the local instance/class method declared in this interface.
816  ObjCMethodDecl *getInstanceMethod(Selector Sel) const;
817  ObjCMethodDecl *getClassMethod(Selector Sel) const;
818  ObjCMethodDecl *getMethod(Selector Sel, bool isInstance) const {
819    return isInstance ? getInstanceMethod(Sel) : getClassMethod(Sel);
820  }
821
822  void addPropertyImplementation(ObjCPropertyImplDecl *property) {
823    PropertyImplementations.push_back(property);
824  }
825
826  ObjCPropertyImplDecl *FindPropertyImplDecl(IdentifierInfo *propertyId) const;
827  ObjCPropertyImplDecl *FindPropertyImplIvarDecl(IdentifierInfo *ivarId) const;
828
829  typedef llvm::SmallVector<ObjCPropertyImplDecl*, 8>::const_iterator
830    propimpl_iterator;
831  propimpl_iterator propimpl_begin() const {
832    return PropertyImplementations.begin();
833  }
834  propimpl_iterator propimpl_end() const {
835    return PropertyImplementations.end();
836  }
837
838  typedef llvm::SmallVector<ObjCMethodDecl*, 32>::const_iterator
839    instmeth_iterator;
840  instmeth_iterator instmeth_begin() const { return InstanceMethods.begin(); }
841  instmeth_iterator instmeth_end() const { return InstanceMethods.end(); }
842
843  typedef llvm::SmallVector<ObjCMethodDecl*, 32>::const_iterator
844    classmeth_iterator;
845  classmeth_iterator classmeth_begin() const { return ClassMethods.begin(); }
846  classmeth_iterator classmeth_end() const { return ClassMethods.end(); }
847
848
849  // Location information, modeled after the Stmt API.
850  SourceLocation getLocStart() const { return getLocation(); }
851  SourceLocation getLocEnd() const { return EndLoc; }
852  void setLocEnd(SourceLocation LE) { EndLoc = LE; };
853};
854
855/// ObjCCategoryImplDecl - An object of this class encapsulates a category
856/// @implementation declaration. If a category class has declaration of a
857/// property, its implementation must be specified in the category's
858/// @implementation declaration. Example:
859/// @interface I @end
860/// @interface I(CATEGORY)
861///    @property int p1, d1;
862/// @end
863/// @implementation I(CATEGORY)
864///  @dynamic p1,d1;
865/// @end
866///
867/// ObjCCategoryImplDecl
868class ObjCCategoryImplDecl : public ObjCImplDecl {
869  // Category name
870  IdentifierInfo *Id;
871
872  ObjCCategoryImplDecl(DeclContext *DC, SourceLocation L, IdentifierInfo *Id,
873                       ObjCInterfaceDecl *classInterface)
874    : ObjCImplDecl(ObjCCategoryImpl, DC, L, classInterface), Id(Id) {}
875public:
876  static ObjCCategoryImplDecl *Create(ASTContext &C, DeclContext *DC,
877                                      SourceLocation L, IdentifierInfo *Id,
878                                      ObjCInterfaceDecl *classInterface);
879
880  /// getIdentifier - Get the identifier that names the class
881  /// interface associated with this implementation.
882  IdentifierInfo *getIdentifier() const {
883    return Id;
884  }
885
886  /// getNameAsCString - Get the name of identifier for the class
887  /// interface associated with this implementation as a C string
888  /// (const char*).
889  const char *getNameAsCString() const {
890    return Id ? Id->getName() : "";
891  }
892
893  /// @brief Get the name of the class associated with this interface.
894  std::string getNameAsString() const {
895    return Id ? Id->getName() : "";
896  }
897
898  static bool classof(const Decl *D) { return D->getKind() == ObjCCategoryImpl;}
899  static bool classof(const ObjCCategoryImplDecl *D) { return true; }
900  static DeclContext *castToDeclContext(const ObjCCategoryImplDecl *D) {
901    return static_cast<DeclContext *>(const_cast<ObjCCategoryImplDecl*>(D));
902  }
903  static ObjCCategoryImplDecl *castFromDeclContext(const DeclContext *DC) {
904    return static_cast<ObjCCategoryImplDecl *>(const_cast<DeclContext*>(DC));
905  }
906};
907
908/// ObjCImplementationDecl - Represents a class definition - this is where
909/// method definitions are specified. For example:
910///
911/// @code
912/// @implementation MyClass
913/// - (void)myMethod { /* do something */ }
914/// @end
915/// @endcode
916///
917/// Typically, instance variables are specified in the class interface,
918/// *not* in the implementation. Nevertheless (for legacy reasons), we
919/// allow instance variables to be specified in the implementation.  When
920/// specified, they need to be *identical* to the interface.
921///
922class ObjCImplementationDecl : public ObjCImplDecl {
923  /// Implementation Class's super class.
924  ObjCInterfaceDecl *SuperClass;
925
926  /// Instance variables declared in the @implementation.
927  ObjCList<ObjCIvarDecl> IVars;
928
929  ObjCImplementationDecl(DeclContext *DC, SourceLocation L,
930                         ObjCInterfaceDecl *classInterface,
931                         ObjCInterfaceDecl *superDecl)
932    : ObjCImplDecl(ObjCImplementation, DC, L, classInterface),
933       SuperClass(superDecl){}
934public:
935  static ObjCImplementationDecl *Create(ASTContext &C, DeclContext *DC,
936                                        SourceLocation L,
937                                        ObjCInterfaceDecl *classInterface,
938                                        ObjCInterfaceDecl *superDecl);
939
940  /// Destroy - Call destructors and release memory.
941  virtual void Destroy(ASTContext& C);
942
943  void setIVarList(ObjCIvarDecl *const *InArray, unsigned Num, ASTContext &C) {
944    IVars.set(InArray, Num, C);
945  }
946
947  /// getIdentifier - Get the identifier that names the class
948  /// interface associated with this implementation.
949  IdentifierInfo *getIdentifier() const {
950    return getClassInterface()->getIdentifier();
951  }
952
953  /// getNameAsCString - Get the name of identifier for the class
954  /// interface associated with this implementation as a C string
955  /// (const char*).
956  const char *getNameAsCString() const {
957    assert(getIdentifier() && "Name is not a simple identifier");
958    return getIdentifier()->getName();
959  }
960
961  /// @brief Get the name of the class associated with this interface.
962  std::string getNameAsString() const {
963    return getClassInterface()->getNameAsString();
964  }
965
966  const ObjCInterfaceDecl *getSuperClass() const { return SuperClass; }
967  ObjCInterfaceDecl *getSuperClass() { return SuperClass; }
968
969  void setSuperClass(ObjCInterfaceDecl * superCls) { SuperClass = superCls; }
970
971  typedef ObjCList<ObjCIvarDecl>::iterator ivar_iterator;
972  ivar_iterator ivar_begin() const { return IVars.begin(); }
973  ivar_iterator ivar_end() const { return IVars.end(); }
974  unsigned ivar_size() const { return IVars.size(); }
975  bool ivar_empty() const { return IVars.empty(); }
976
977  static bool classof(const Decl *D) {
978    return D->getKind() == ObjCImplementation;
979  }
980  static bool classof(const ObjCImplementationDecl *D) { return true; }
981  static DeclContext *castToDeclContext(const ObjCImplementationDecl *D) {
982    return static_cast<DeclContext *>(const_cast<ObjCImplementationDecl*>(D));
983  }
984  static ObjCImplementationDecl *castFromDeclContext(const DeclContext *DC) {
985    return static_cast<ObjCImplementationDecl *>(const_cast<DeclContext*>(DC));
986  }
987};
988
989/// ObjCCompatibleAliasDecl - Represents alias of a class. This alias is
990/// declared as @compatibility_alias alias class.
991class ObjCCompatibleAliasDecl : public NamedDecl {
992  /// Class that this is an alias of.
993  ObjCInterfaceDecl *AliasedClass;
994
995  ObjCCompatibleAliasDecl(DeclContext *DC, SourceLocation L, IdentifierInfo *Id,
996                          ObjCInterfaceDecl* aliasedClass)
997    : NamedDecl(ObjCCompatibleAlias, DC, L, Id), AliasedClass(aliasedClass) {}
998public:
999  static ObjCCompatibleAliasDecl *Create(ASTContext &C, DeclContext *DC,
1000                                         SourceLocation L, IdentifierInfo *Id,
1001                                         ObjCInterfaceDecl* aliasedClass);
1002
1003  const ObjCInterfaceDecl *getClassInterface() const { return AliasedClass; }
1004  ObjCInterfaceDecl *getClassInterface() { return AliasedClass; }
1005
1006  static bool classof(const Decl *D) {
1007    return D->getKind() == ObjCCompatibleAlias;
1008  }
1009  static bool classof(const ObjCCompatibleAliasDecl *D) { return true; }
1010
1011};
1012
1013/// ObjCPropertyDecl - Represents one property declaration in an interface.
1014/// For example:
1015/// @property (assign, readwrite) int MyProperty;
1016///
1017class ObjCPropertyDecl : public NamedDecl {
1018public:
1019  enum PropertyAttributeKind {
1020    OBJC_PR_noattr    = 0x00,
1021    OBJC_PR_readonly  = 0x01,
1022    OBJC_PR_getter    = 0x02,
1023    OBJC_PR_assign    = 0x04,
1024    OBJC_PR_readwrite = 0x08,
1025    OBJC_PR_retain    = 0x10,
1026    OBJC_PR_copy      = 0x20,
1027    OBJC_PR_nonatomic = 0x40,
1028    OBJC_PR_setter    = 0x80
1029  };
1030
1031  enum SetterKind { Assign, Retain, Copy };
1032  enum PropertyControl { None, Required, Optional };
1033private:
1034  QualType DeclType;
1035  unsigned PropertyAttributes : 8;
1036
1037  // @required/@optional
1038  unsigned PropertyImplementation : 2;
1039
1040  Selector GetterName;    // getter name of NULL if no getter
1041  Selector SetterName;    // setter name of NULL if no setter
1042
1043  ObjCMethodDecl *GetterMethodDecl; // Declaration of getter instance method
1044  ObjCMethodDecl *SetterMethodDecl; // Declaration of setter instance method
1045  ObjCIvarDecl *PropertyIvarDecl;   // Synthesize ivar for this property
1046
1047  ObjCPropertyDecl(DeclContext *DC, SourceLocation L, IdentifierInfo *Id,
1048                   QualType T)
1049    : NamedDecl(ObjCProperty, DC, L, Id), DeclType(T),
1050      PropertyAttributes(OBJC_PR_noattr), PropertyImplementation(None),
1051      GetterName(Selector()),
1052      SetterName(Selector()),
1053      GetterMethodDecl(0), SetterMethodDecl(0) , PropertyIvarDecl(0) {}
1054public:
1055  static ObjCPropertyDecl *Create(ASTContext &C, DeclContext *DC,
1056                                  SourceLocation L,
1057                                  IdentifierInfo *Id, QualType T,
1058                                  PropertyControl propControl = None);
1059  QualType getType() const { return DeclType; }
1060
1061  PropertyAttributeKind getPropertyAttributes() const {
1062    return PropertyAttributeKind(PropertyAttributes);
1063  }
1064  void setPropertyAttributes(PropertyAttributeKind PRVal) {
1065    PropertyAttributes |= PRVal;
1066  }
1067
1068 void makeitReadWriteAttribute(void) {
1069    PropertyAttributes &= ~OBJC_PR_readonly;
1070    PropertyAttributes |= OBJC_PR_readwrite;
1071 }
1072
1073  // Helper methods for accessing attributes.
1074
1075  /// isReadOnly - Return true iff the property has a setter.
1076  bool isReadOnly() const {
1077    return (PropertyAttributes & OBJC_PR_readonly);
1078  }
1079
1080  /// getSetterKind - Return the method used for doing assignment in
1081  /// the property setter. This is only valid if the property has been
1082  /// defined to have a setter.
1083  SetterKind getSetterKind() const {
1084    if (PropertyAttributes & OBJC_PR_retain)
1085      return Retain;
1086    if (PropertyAttributes & OBJC_PR_copy)
1087      return Copy;
1088    return Assign;
1089  }
1090
1091  Selector getGetterName() const { return GetterName; }
1092  void setGetterName(Selector Sel) { GetterName = Sel; }
1093
1094  Selector getSetterName() const { return SetterName; }
1095  void setSetterName(Selector Sel) { SetterName = Sel; }
1096
1097  ObjCMethodDecl *getGetterMethodDecl() const { return GetterMethodDecl; }
1098  void setGetterMethodDecl(ObjCMethodDecl *gDecl) { GetterMethodDecl = gDecl; }
1099
1100  ObjCMethodDecl *getSetterMethodDecl() const { return SetterMethodDecl; }
1101  void setSetterMethodDecl(ObjCMethodDecl *gDecl) { SetterMethodDecl = gDecl; }
1102
1103  // Related to @optional/@required declared in @protocol
1104  void setPropertyImplementation(PropertyControl pc) {
1105    PropertyImplementation = pc;
1106  }
1107  PropertyControl getPropertyImplementation() const {
1108    return PropertyControl(PropertyImplementation);
1109  }
1110
1111  void setPropertyIvarDecl(ObjCIvarDecl *Ivar) {
1112    PropertyIvarDecl = Ivar;
1113  }
1114  ObjCIvarDecl *getPropertyIvarDecl() const {
1115    return PropertyIvarDecl;
1116  }
1117
1118  static bool classof(const Decl *D) {
1119    return D->getKind() == ObjCProperty;
1120  }
1121  static bool classof(const ObjCPropertyDecl *D) { return true; }
1122};
1123
1124/// ObjCPropertyImplDecl - Represents implementation declaration of a property
1125/// in a class or category implementation block. For example:
1126/// @synthesize prop1 = ivar1;
1127///
1128class ObjCPropertyImplDecl : public Decl {
1129public:
1130  enum Kind {
1131    Synthesize,
1132    Dynamic
1133  };
1134private:
1135  SourceLocation AtLoc;   // location of @synthesize or @dynamic
1136  /// Property declaration being implemented
1137  ObjCPropertyDecl *PropertyDecl;
1138
1139  /// Null for @dynamic. Required for @synthesize.
1140  ObjCIvarDecl *PropertyIvarDecl;
1141
1142  ObjCPropertyImplDecl(DeclContext *DC, SourceLocation atLoc, SourceLocation L,
1143                       ObjCPropertyDecl *property,
1144                       Kind PK,
1145                       ObjCIvarDecl *ivarDecl)
1146    : Decl(ObjCPropertyImpl, DC, L), AtLoc(atLoc),
1147      PropertyDecl(property), PropertyIvarDecl(ivarDecl) {
1148    assert (PK == Dynamic || PropertyIvarDecl);
1149  }
1150
1151public:
1152  static ObjCPropertyImplDecl *Create(ASTContext &C, DeclContext *DC,
1153                                      SourceLocation atLoc, SourceLocation L,
1154                                      ObjCPropertyDecl *property,
1155                                      Kind PK,
1156                                      ObjCIvarDecl *ivarDecl);
1157
1158  SourceLocation getLocStart() const { return AtLoc; }
1159
1160  ObjCPropertyDecl *getPropertyDecl() const {
1161    return PropertyDecl;
1162  }
1163
1164  Kind getPropertyImplementation() const {
1165    return PropertyIvarDecl ? Synthesize : Dynamic;
1166  }
1167
1168  ObjCIvarDecl *getPropertyIvarDecl() const {
1169    return PropertyIvarDecl;
1170  }
1171
1172  static bool classof(const Decl *D) {
1173    return D->getKind() == ObjCPropertyImpl;
1174  }
1175  static bool classof(const ObjCPropertyImplDecl *D) { return true; }
1176};
1177
1178}  // end namespace clang
1179#endif
1180