ASTContext.h revision be63802d1efe52697f49aafea49a5028b30b0aff 
1//===--- ASTContext.h - Context to hold long-lived AST nodes ----*- 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 ASTContext interface.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_CLANG_AST_ASTCONTEXT_H
15#define LLVM_CLANG_AST_ASTCONTEXT_H
16
17#include "clang/Basic/IdentifierTable.h"
18#include "clang/Basic/LangOptions.h"
19#include "clang/AST/Builtins.h"
20#include "clang/AST/DeclarationName.h"
21#include "clang/AST/DeclBase.h"
22#include "clang/AST/Type.h"
23#include "clang/Basic/SourceLocation.h"
24#include "llvm/ADT/DenseMap.h"
25#include "llvm/ADT/FoldingSet.h"
26#include "llvm/Bitcode/SerializationFwd.h"
27#include "llvm/Support/Allocator.h"
28#include <vector>
29
30namespace llvm {
31  struct fltSemantics;
32}
33
34namespace clang {
35  class ASTRecordLayout;
36  class Expr;
37  class IdentifierTable;
38  class SelectorTable;
39  class SourceManager;
40  class TargetInfo;
41  // Decls
42  class Decl;
43  class ObjCPropertyDecl;
44  class RecordDecl;
45  class TagDecl;
46  class TranslationUnitDecl;
47  class TypeDecl;
48  class TypedefDecl;
49  class TemplateTypeParmDecl;
50  class FieldDecl;
51  class ObjCIvarRefExpr;
52  class ObjCIvarDecl;
53
54/// ASTContext - This class holds long-lived AST nodes (such as types and
55/// decls) that can be referred to throughout the semantic analysis of a file.
56class ASTContext {
57  std::vector<Type*> Types;
58  llvm::FoldingSet<ASQualType> ASQualTypes;
59  llvm::FoldingSet<ComplexType> ComplexTypes;
60  llvm::FoldingSet<PointerType> PointerTypes;
61  llvm::FoldingSet<BlockPointerType> BlockPointerTypes;
62  llvm::FoldingSet<ReferenceType> ReferenceTypes;
63  llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes;
64  llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes;
65  std::vector<VariableArrayType*> VariableArrayTypes;
66  std::vector<DependentSizedArrayType*> DependentSizedArrayTypes;
67  llvm::FoldingSet<VectorType> VectorTypes;
68  llvm::FoldingSet<FunctionTypeNoProto> FunctionTypeNoProtos;
69  llvm::FoldingSet<FunctionTypeProto> FunctionTypeProtos;
70  llvm::FoldingSet<ObjCQualifiedInterfaceType> ObjCQualifiedInterfaceTypes;
71  llvm::FoldingSet<ObjCQualifiedIdType> ObjCQualifiedIdTypes;
72  /// ASTRecordLayouts - A cache mapping from RecordDecls to ASTRecordLayouts.
73  ///  This is lazily created.  This is intentionally not serialized.
74  llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*> ASTRecordLayouts;
75  llvm::DenseMap<const ObjCInterfaceDecl*,
76                 const ASTRecordLayout*> ASTObjCInterfaces;
77
78  // FIXME: Shouldn't ASTRecordForInterface/ASTFieldForIvarRef and
79  // addRecordToClass/getFieldDecl be part of the backend (i.e. CodeGenTypes and
80  // CodeGenFunction)?
81  llvm::DenseMap<const ObjCInterfaceDecl*,
82                 const RecordDecl*> ASTRecordForInterface;
83  llvm::DenseMap<const ObjCIvarRefExpr*, const FieldDecl*> ASTFieldForIvarRef;
84
85  /// BuiltinVaListType - built-in va list type.
86  /// This is initially null and set by Sema::LazilyCreateBuiltin when
87  /// a builtin that takes a valist is encountered.
88  QualType BuiltinVaListType;
89
90  /// ObjCIdType - a pseudo built-in typedef type (set by Sema).
91  QualType ObjCIdType;
92  const RecordType *IdStructType;
93
94  /// ObjCSelType - another pseudo built-in typedef type (set by Sema).
95  QualType ObjCSelType;
96  const RecordType *SelStructType;
97
98  /// ObjCProtoType - another pseudo built-in typedef type (set by Sema).
99  QualType ObjCProtoType;
100  const RecordType *ProtoStructType;
101
102  /// ObjCClassType - another pseudo built-in typedef type (set by Sema).
103  QualType ObjCClassType;
104  const RecordType *ClassStructType;
105
106  QualType ObjCConstantStringType;
107  RecordDecl *CFConstantStringTypeDecl;
108
109  RecordDecl *ObjCFastEnumerationStateTypeDecl;
110
111  TranslationUnitDecl *TUDecl;
112
113  /// SourceMgr - The associated SourceManager object.
114  SourceManager &SourceMgr;
115
116  /// LangOpts - The language options used to create the AST associated with
117  ///  this ASTContext object.
118  LangOptions LangOpts;
119
120  /// Allocator - The allocator object used to create AST objects.
121  llvm::MallocAllocator Allocator;
122
123public:
124  TargetInfo &Target;
125  IdentifierTable &Idents;
126  SelectorTable &Selectors;
127  DeclarationNameTable DeclarationNames;
128
129  SourceManager& getSourceManager() { return SourceMgr; }
130  llvm::MallocAllocator &getAllocator() { return Allocator; }
131  const LangOptions& getLangOptions() const { return LangOpts; }
132
133  FullSourceLoc getFullLoc(SourceLocation Loc) const {
134    return FullSourceLoc(Loc,SourceMgr);
135  }
136
137  TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; }
138
139  /// This is intentionally not serialized.  It is populated by the
140  /// ASTContext ctor, and there are no external pointers/references to
141  /// internal variables of BuiltinInfo.
142  Builtin::Context BuiltinInfo;
143
144  // Builtin Types.
145  QualType VoidTy;
146  QualType BoolTy;
147  QualType CharTy;
148  QualType WCharTy; // [C++ 3.9.1p5]
149  QualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy;
150  QualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy;
151  QualType UnsignedLongLongTy;
152  QualType FloatTy, DoubleTy, LongDoubleTy;
153  QualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy;
154  QualType VoidPtrTy;
155  QualType OverloadTy;
156  QualType DependentTy;
157
158  ASTContext(const LangOptions& LOpts, SourceManager &SM, TargetInfo &t,
159             IdentifierTable &idents, SelectorTable &sels,
160             unsigned size_reserve=0);
161
162  ~ASTContext();
163
164  void PrintStats() const;
165  const std::vector<Type*>& getTypes() const { return Types; }
166
167  //===--------------------------------------------------------------------===//
168  //                           Type Constructors
169  //===--------------------------------------------------------------------===//
170
171  /// getASQualType - Return the uniqued reference to the type for an address
172  /// space qualified type with the specified type and address space.  The
173  /// resulting type has a union of the qualifiers from T and the address space.
174  // If T already has an address space specifier, it is silently replaced.
175  QualType getASQualType(QualType T, unsigned AddressSpace);
176
177  /// getComplexType - Return the uniqued reference to the type for a complex
178  /// number with the specified element type.
179  QualType getComplexType(QualType T);
180
181  /// getPointerType - Return the uniqued reference to the type for a pointer to
182  /// the specified type.
183  QualType getPointerType(QualType T);
184
185  /// getBlockPointerType - Return the uniqued reference to the type for a block
186  /// of the specified type.
187  QualType getBlockPointerType(QualType T);
188
189  /// getReferenceType - Return the uniqued reference to the type for a
190  /// reference to the specified type.
191  QualType getReferenceType(QualType T);
192
193  /// getVariableArrayType - Returns a non-unique reference to the type for a
194  /// variable array of the specified element type.
195  QualType getVariableArrayType(QualType EltTy, Expr *NumElts,
196                                ArrayType::ArraySizeModifier ASM,
197                                unsigned EltTypeQuals);
198
199  /// getDependentSizedArrayType - Returns a non-unique reference to
200  /// the type for a dependently-sized array of the specified element
201  /// type. FIXME: We will need these to be uniqued, or at least
202  /// comparable, at some point.
203  QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts,
204                                      ArrayType::ArraySizeModifier ASM,
205                                      unsigned EltTypeQuals);
206
207  /// getIncompleteArrayType - Returns a unique reference to the type for a
208  /// incomplete array of the specified element type.
209  QualType getIncompleteArrayType(QualType EltTy,
210                                  ArrayType::ArraySizeModifier ASM,
211                                  unsigned EltTypeQuals);
212
213  /// getConstantArrayType - Return the unique reference to the type for a
214  /// constant array of the specified element type.
215  QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize,
216                                ArrayType::ArraySizeModifier ASM,
217                                unsigned EltTypeQuals);
218
219  /// getVectorType - Return the unique reference to a vector type of
220  /// the specified element type and size. VectorType must be a built-in type.
221  QualType getVectorType(QualType VectorType, unsigned NumElts);
222
223  /// getExtVectorType - Return the unique reference to an extended vector type
224  /// of the specified element type and size.  VectorType must be a built-in
225  /// type.
226  QualType getExtVectorType(QualType VectorType, unsigned NumElts);
227
228  /// getFunctionTypeNoProto - Return a K&R style C function type like 'int()'.
229  ///
230  QualType getFunctionTypeNoProto(QualType ResultTy);
231
232  /// getFunctionType - Return a normal function type with a typed argument
233  /// list.  isVariadic indicates whether the argument list includes '...'.
234  QualType getFunctionType(QualType ResultTy, const QualType *ArgArray,
235                           unsigned NumArgs, bool isVariadic,
236                           unsigned TypeQuals);
237
238  /// getTypeDeclType - Return the unique reference to the type for
239  /// the specified type declaration.
240  QualType getTypeDeclType(TypeDecl *Decl, TypeDecl* PrevDecl=0);
241
242  /// getTypedefType - Return the unique reference to the type for the
243  /// specified typename decl.
244  QualType getTypedefType(TypedefDecl *Decl);
245  QualType getTemplateTypeParmType(TemplateTypeParmDecl *Decl);
246  QualType getObjCInterfaceType(ObjCInterfaceDecl *Decl);
247
248  /// getObjCQualifiedInterfaceType - Return a
249  /// ObjCQualifiedInterfaceType type for the given interface decl and
250  /// the conforming protocol list.
251  QualType getObjCQualifiedInterfaceType(ObjCInterfaceDecl *Decl,
252             ObjCProtocolDecl **ProtocolList, unsigned NumProtocols);
253
254  /// getObjCQualifiedIdType - Return an ObjCQualifiedIdType for a
255  /// given 'id' and conforming protocol list.
256  QualType getObjCQualifiedIdType(ObjCProtocolDecl **ProtocolList,
257                                  unsigned NumProtocols);
258
259
260  /// getTypeOfType - GCC extension.
261  QualType getTypeOfExpr(Expr *e);
262  QualType getTypeOfType(QualType t);
263
264  /// getTagDeclType - Return the unique reference to the type for the
265  /// specified TagDecl (struct/union/class/enum) decl.
266  QualType getTagDeclType(TagDecl *Decl);
267
268  /// getSizeType - Return the unique type for "size_t" (C99 7.17), defined
269  /// in <stddef.h>. The sizeof operator requires this (C99 6.5.3.4p4).
270  QualType getSizeType() const;
271
272  /// getWCharType - Return the unique type for "wchar_t" (C99 7.17), defined
273  /// in <stddef.h>. Wide strings require this (C99 6.4.5p5).
274  QualType getWCharType() const;
275
276  /// getSignedWCharType - Return the type of "signed wchar_t".
277  /// Used when in C++, as a GCC extension.
278  QualType getSignedWCharType() const;
279
280  /// getUnsignedWCharType - Return the type of "unsigned wchar_t".
281  /// Used when in C++, as a GCC extension.
282  QualType getUnsignedWCharType() const;
283
284  /// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?)
285  /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9).
286  QualType getPointerDiffType() const;
287
288  // getCFConstantStringType - Return the C structure type used to represent
289  // constant CFStrings.
290  QualType getCFConstantStringType();
291
292  // This setter/getter represents the ObjC type for an NSConstantString.
293  void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl);
294  QualType getObjCConstantStringInterface() const {
295    return ObjCConstantStringType;
296  }
297
298  //// This gets the struct used to keep track of fast enumerations.
299  QualType getObjCFastEnumerationStateType();
300
301  /// getObjCEncodingForType - Emit the ObjC type encoding for the
302  /// given type into \arg S. If \arg NameFields is specified then
303  /// record field names are also encoded.
304  void getObjCEncodingForType(QualType t, std::string &S,
305                              FieldDecl *Field=NULL) const;
306
307  void getLegacyIntegralTypeEncoding(QualType &t) const;
308
309  // Put the string version of type qualifiers into S.
310  void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT,
311                                       std::string &S) const;
312
313  /// getObjCEncodingForMethodDecl - Return the encoded type for this method
314  /// declaration.
315  void getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, std::string &S);
316
317  /// getObjCEncodingForPropertyDecl - Return the encoded type for
318  /// this method declaration. If non-NULL, Container must be either
319  /// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should
320  /// only be NULL when getting encodings for protocol properties.
321  void getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD,
322                                      const Decl *Container,
323                                      std::string &S);
324
325  /// getObjCEncodingTypeSize returns size of type for objective-c encoding
326  /// purpose.
327  int getObjCEncodingTypeSize(QualType t);
328
329  /// This setter/getter represents the ObjC 'id' type. It is setup lazily, by
330  /// Sema.  id is always a (typedef for a) pointer type, a pointer to a struct.
331  QualType getObjCIdType() const { return ObjCIdType; }
332  void setObjCIdType(TypedefDecl *Decl);
333
334  void setObjCSelType(TypedefDecl *Decl);
335  QualType getObjCSelType() const { return ObjCSelType; }
336
337  void setObjCProtoType(QualType QT);
338  QualType getObjCProtoType() const { return ObjCProtoType; }
339
340  /// This setter/getter repreents the ObjC 'Class' type. It is setup lazily, by
341  /// Sema.  'Class' is always a (typedef for a) pointer type, a pointer to a
342  /// struct.
343  QualType getObjCClassType() const { return ObjCClassType; }
344  void setObjCClassType(TypedefDecl *Decl);
345
346  void setBuiltinVaListType(QualType T);
347  QualType getBuiltinVaListType() const { return BuiltinVaListType; }
348
349private:
350  QualType getFromTargetType(unsigned Type) const;
351
352  //===--------------------------------------------------------------------===//
353  //                         Type Predicates.
354  //===--------------------------------------------------------------------===//
355
356public:
357  /// isObjCObjectPointerType - Returns true if type is an Objective-C pointer
358  /// to an object type.  This includes "id" and "Class" (two 'special' pointers
359  /// to struct), Interface* (pointer to ObjCInterfaceType) and id<P> (qualified
360  /// ID type).
361  bool isObjCObjectPointerType(QualType Ty) const;
362
363  /// isObjCNSObjectType - Return true if this is an NSObject object with
364  /// its NSObject attribute set.
365  bool isObjCNSObjectType(QualType Ty) const;
366
367  //===--------------------------------------------------------------------===//
368  //                         Type Sizing and Analysis
369  //===--------------------------------------------------------------------===//
370
371  /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified
372  /// scalar floating point type.
373  const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const;
374
375  /// getTypeInfo - Get the size and alignment of the specified complete type in
376  /// bits.
377  std::pair<uint64_t, unsigned> getTypeInfo(const Type *T);
378  std::pair<uint64_t, unsigned> getTypeInfo(QualType T) {
379    return getTypeInfo(T.getTypePtr());
380  }
381
382  /// getTypeSize - Return the size of the specified type, in bits.  This method
383  /// does not work on incomplete types.
384  uint64_t getTypeSize(QualType T) {
385    return getTypeInfo(T).first;
386  }
387  uint64_t getTypeSize(const Type *T) {
388    return getTypeInfo(T).first;
389  }
390
391  /// getTypeAlign - Return the alignment of the specified type, in bits.  This
392  /// method does not work on incomplete types.
393  unsigned getTypeAlign(QualType T) {
394    return getTypeInfo(T).second;
395  }
396  unsigned getTypeAlign(const Type *T) {
397    return getTypeInfo(T).second;
398  }
399
400  /// getASTRecordLayout - Get or compute information about the layout of the
401  /// specified record (struct/union/class), which indicates its size and field
402  /// position information.
403  const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D);
404
405  const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D);
406  const RecordDecl *addRecordToClass(const ObjCInterfaceDecl *D);
407  const FieldDecl *getFieldDecl(const ObjCIvarRefExpr *MRef) {
408    llvm::DenseMap<const ObjCIvarRefExpr *, const FieldDecl*>::iterator I
409      = ASTFieldForIvarRef.find(MRef);
410    assert (I != ASTFieldForIvarRef.end()  && "Unable to find field_decl");
411    return I->second;
412  }
413  void setFieldDecl(const ObjCInterfaceDecl *OI,
414                    const ObjCIvarDecl *Ivar,
415                    const ObjCIvarRefExpr *MRef);
416  //===--------------------------------------------------------------------===//
417  //                            Type Operators
418  //===--------------------------------------------------------------------===//
419
420  /// getCanonicalType - Return the canonical (structural) type corresponding to
421  /// the specified potentially non-canonical type.  The non-canonical version
422  /// of a type may have many "decorated" versions of types.  Decorators can
423  /// include typedefs, 'typeof' operators, etc. The returned type is guaranteed
424  /// to be free of any of these, allowing two canonical types to be compared
425  /// for exact equality with a simple pointer comparison.
426  QualType getCanonicalType(QualType T);
427  const Type *getCanonicalType(const Type *T) {
428    return T->getCanonicalTypeInternal().getTypePtr();
429  }
430
431  /// Type Query functions.  If the type is an instance of the specified class,
432  /// return the Type pointer for the underlying maximally pretty type.  This
433  /// is a member of ASTContext because this may need to do some amount of
434  /// canonicalization, e.g. to move type qualifiers into the element type.
435  const ArrayType *getAsArrayType(QualType T);
436  const ConstantArrayType *getAsConstantArrayType(QualType T) {
437    return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T));
438  }
439  const VariableArrayType *getAsVariableArrayType(QualType T) {
440    return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T));
441  }
442  const IncompleteArrayType *getAsIncompleteArrayType(QualType T) {
443    return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T));
444  }
445
446  /// getBaseElementType - Returns the innermost element type of a variable
447  /// length array type. For example, will return "int" for int[m][n]
448  QualType getBaseElementType(const VariableArrayType *VAT);
449
450  /// getArrayDecayedType - Return the properly qualified result of decaying the
451  /// specified array type to a pointer.  This operation is non-trivial when
452  /// handling typedefs etc.  The canonical type of "T" must be an array type,
453  /// this returns a pointer to a properly qualified element of the array.
454  ///
455  /// See C99 6.7.5.3p7 and C99 6.3.2.1p3.
456  QualType getArrayDecayedType(QualType T);
457
458  /// getIntegerTypeOrder - Returns the highest ranked integer type:
459  /// C99 6.3.1.8p1.  If LHS > RHS, return 1.  If LHS == RHS, return 0. If
460  /// LHS < RHS, return -1.
461  int getIntegerTypeOrder(QualType LHS, QualType RHS);
462
463  /// getFloatingTypeOrder - Compare the rank of the two specified floating
464  /// point types, ignoring the domain of the type (i.e. 'double' ==
465  /// '_Complex double').  If LHS > RHS, return 1.  If LHS == RHS, return 0. If
466  /// LHS < RHS, return -1.
467  int getFloatingTypeOrder(QualType LHS, QualType RHS);
468
469  /// getFloatingTypeOfSizeWithinDomain - Returns a real floating
470  /// point or a complex type (based on typeDomain/typeSize).
471  /// 'typeDomain' is a real floating point or complex type.
472  /// 'typeSize' is a real floating point or complex type.
473  QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize,
474                                             QualType typeDomain) const;
475
476  //===--------------------------------------------------------------------===//
477  //                    Type Compatibility Predicates
478  //===--------------------------------------------------------------------===//
479
480  /// Compatibility predicates used to check assignment expressions.
481  bool typesAreCompatible(QualType, QualType); // C99 6.2.7p1
482  bool typesAreBlockCompatible(QualType lhs, QualType rhs);
483
484  bool isObjCIdType(QualType T) const {
485    if (!IdStructType) // ObjC isn't enabled
486      return false;
487    return T->getAsStructureType() == IdStructType;
488  }
489  bool isObjCClassType(QualType T) const {
490    if (!ClassStructType) // ObjC isn't enabled
491      return false;
492    return T->getAsStructureType() == ClassStructType;
493  }
494  bool isObjCSelType(QualType T) const {
495    assert(SelStructType && "isObjCSelType used before 'SEL' type is built");
496    return T->getAsStructureType() == SelStructType;
497  }
498
499  // Check the safety of assignment from LHS to RHS
500  bool canAssignObjCInterfaces(const ObjCInterfaceType *LHS,
501                               const ObjCInterfaceType *RHS);
502
503  // Functions for calculating composite types
504  QualType mergeTypes(QualType, QualType);
505  QualType mergeFunctionTypes(QualType, QualType);
506
507  //===--------------------------------------------------------------------===//
508  //                    Integer Predicates
509  //===--------------------------------------------------------------------===//
510
511  // The width of an integer, as defined in C99 6.2.6.2. This is the number
512  // of bits in an integer type excluding any padding bits.
513  unsigned getIntWidth(QualType T);
514
515  // Per C99 6.2.5p6, for every signed integer type, there is a corresponding
516  // unsigned integer type.  This method takes a signed type, and returns the
517  // corresponding unsigned integer type.
518  QualType getCorrespondingUnsignedType(QualType T);
519
520  //===--------------------------------------------------------------------===//
521  //                    Type Iterators.
522  //===--------------------------------------------------------------------===//
523
524  typedef std::vector<Type*>::iterator       type_iterator;
525  typedef std::vector<Type*>::const_iterator const_type_iterator;
526
527  type_iterator types_begin() { return Types.begin(); }
528  type_iterator types_end() { return Types.end(); }
529  const_type_iterator types_begin() const { return Types.begin(); }
530  const_type_iterator types_end() const { return Types.end(); }
531
532  //===--------------------------------------------------------------------===//
533  //                    Serialization
534  //===--------------------------------------------------------------------===//
535
536  void Emit(llvm::Serializer& S) const;
537  static ASTContext* Create(llvm::Deserializer& D);
538
539private:
540  ASTContext(const ASTContext&); // DO NOT IMPLEMENT
541  void operator=(const ASTContext&); // DO NOT IMPLEMENT
542
543  void InitBuiltinTypes();
544  void InitBuiltinType(QualType &R, BuiltinType::Kind K);
545
546  /// setTagDefinition - Used by RecordDecl::completeDefinition and
547  /// EnumDecl::completeDefinition to inform
548  /// about which RecordDecl/EnumDecl serves as the definition of a particular
549  /// struct/union/class/enum.
550  void setTagDefinition(TagDecl* R);
551  friend class EnumDecl;
552  friend class RecordDecl;
553
554  // Return the ObjC type encoding for a given type.
555  void getObjCEncodingForTypeImpl(QualType t, std::string &S,
556                                  bool ExpandPointedToStructures,
557                                  bool ExpandStructures,
558                                  FieldDecl *Field,
559                                  bool OutermostType = false) const;
560
561};
562
563}  // end namespace clang
564
565#endif
566