CanonicalType.h revision 94cf910ac2d1719c1dfc163bbec3953f12efdf6f 
1//===-- CanonicalType.h - C Language Family Type Representation -*- 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 CanQual class template, which provides access to
11//  canonical types.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_CLANG_AST_CANONICAL_TYPE_H
16#define LLVM_CLANG_AST_CANONICAL_TYPE_H
17
18#include "clang/AST/Type.h"
19#include "llvm/Support/Casting.h"
20#include "llvm/Support/type_traits.h"
21#include <iterator>
22
23namespace clang {
24
25template<typename T> class CanProxy;
26template<typename T> struct CanProxyAdaptor;
27
28//----------------------------------------------------------------------------//
29// Canonical, qualified type template
30//----------------------------------------------------------------------------//
31
32/// \brief Represents a canonical, potentially-qualified type.
33///
34/// The CanQual template is a lightweight smart pointer that provides access
35/// to the canonical representation of a type, where all typedefs and other
36/// syntactic sugar has been eliminated. A CanQualType may also have various
37/// qualifiers (const, volatile, restrict) attached to it.
38///
39/// The template type parameter @p T is one of the Type classes (PointerType,
40/// BuiltinType, etc.). The type stored within @c CanQual<T> will be of that
41/// type (or some subclass of that type). The typedef @c CanQualType is just
42/// a shorthand for @c CanQual<Type>.
43///
44/// An instance of @c CanQual<T> can be implicitly converted to a
45/// @c CanQual<U> when T is derived from U, which essentially provides an
46/// implicit upcast. For example, @c CanQual<LValueReferenceType> can be
47/// converted to @c CanQual<ReferenceType>. Note that any @c CanQual type can
48/// be implicitly converted to a QualType, but the reverse operation requires
49/// a call to ASTContext::getCanonicalType().
50///
51///
52template<typename T = Type>
53class CanQual {
54  /// \brief The actual, canonical type.
55  QualType Stored;
56
57public:
58  /// \brief Constructs a NULL canonical type.
59  CanQual() : Stored() { }
60
61  /// \brief Converting constructor that permits implicit upcasting of
62  /// canonical type pointers.
63  template<typename U>
64  CanQual(const CanQual<U>& Other,
65          typename llvm::enable_if<llvm::is_base_of<T, U>, int>::type = 0);
66
67  /// \brief Retrieve the underlying type pointer, which refers to a
68  /// canonical type.
69  ///
70  /// The underlying pointer must not be NULL.
71  const T *getTypePtr() const { return cast<T>(Stored.getTypePtr()); }
72
73  /// \brief Retrieve the underlying type pointer, which refers to a
74  /// canonical type, or NULL.
75  ///
76  const T *getTypePtrOrNull() const {
77    return cast_or_null<T>(Stored.getTypePtrOrNull());
78  }
79
80  /// \brief Implicit conversion to a qualified type.
81  operator QualType() const { return Stored; }
82
83  /// \brief Implicit conversion to bool.
84  operator bool() const { return !isNull(); }
85
86  bool isNull() const {
87    return Stored.isNull();
88  }
89
90  SplitQualType split() const { return Stored.split(); }
91
92  /// \brief Retrieve a canonical type pointer with a different static type,
93  /// upcasting or downcasting as needed.
94  ///
95  /// The getAs() function is typically used to try to downcast to a
96  /// more specific (canonical) type in the type system. For example:
97  ///
98  /// @code
99  /// void f(CanQual<Type> T) {
100  ///   if (CanQual<PointerType> Ptr = T->getAs<PointerType>()) {
101  ///     // look at Ptr's pointee type
102  ///   }
103  /// }
104  /// @endcode
105  ///
106  /// \returns A proxy pointer to the same type, but with the specified
107  /// static type (@p U). If the dynamic type is not the specified static type
108  /// or a derived class thereof, a NULL canonical type.
109  template<typename U> CanProxy<U> getAs() const;
110
111  template<typename U> CanProxy<U> castAs() const;
112
113  /// \brief Overloaded arrow operator that produces a canonical type
114  /// proxy.
115  CanProxy<T> operator->() const;
116
117  /// \brief Retrieve all qualifiers.
118  Qualifiers getQualifiers() const { return Stored.getLocalQualifiers(); }
119
120  /// \brief Retrieve the const/volatile/restrict qualifiers.
121  unsigned getCVRQualifiers() const { return Stored.getLocalCVRQualifiers(); }
122
123  /// \brief Determines whether this type has any qualifiers
124  bool hasQualifiers() const { return Stored.hasLocalQualifiers(); }
125
126  bool isConstQualified() const {
127    return Stored.isLocalConstQualified();
128  }
129  bool isVolatileQualified() const {
130    return Stored.isLocalVolatileQualified();
131  }
132  bool isRestrictQualified() const {
133    return Stored.isLocalRestrictQualified();
134  }
135
136  /// \brief Determines if this canonical type is furthermore
137  /// canonical as a parameter.  The parameter-canonicalization
138  /// process decays arrays to pointers and drops top-level qualifiers.
139  bool isCanonicalAsParam() const {
140    return Stored.isCanonicalAsParam();
141  }
142
143  /// \brief Retrieve the unqualified form of this type.
144  CanQual<T> getUnqualifiedType() const;
145
146  /// \brief Retrieves a version of this type with const applied.
147  /// Note that this does not always yield a canonical type.
148  QualType withConst() const {
149    return Stored.withConst();
150  }
151
152  /// \brief Determines whether this canonical type is more qualified than
153  /// the @p Other canonical type.
154  bool isMoreQualifiedThan(CanQual<T> Other) const {
155    return Stored.isMoreQualifiedThan(Other.Stored);
156  }
157
158  /// \brief Determines whether this canonical type is at least as qualified as
159  /// the @p Other canonical type.
160  bool isAtLeastAsQualifiedAs(CanQual<T> Other) const {
161    return Stored.isAtLeastAsQualifiedAs(Other.Stored);
162  }
163
164  /// \brief If the canonical type is a reference type, returns the type that
165  /// it refers to; otherwise, returns the type itself.
166  CanQual<Type> getNonReferenceType() const;
167
168  /// \brief Retrieve the internal representation of this canonical type.
169  void *getAsOpaquePtr() const { return Stored.getAsOpaquePtr(); }
170
171  /// \brief Construct a canonical type from its internal representation.
172  static CanQual<T> getFromOpaquePtr(void *Ptr);
173
174  /// \brief Builds a canonical type from a QualType.
175  ///
176  /// This routine is inherently unsafe, because it requires the user to
177  /// ensure that the given type is a canonical type with the correct
178  // (dynamic) type.
179  static CanQual<T> CreateUnsafe(QualType Other);
180
181  void dump() const { Stored.dump(); }
182
183  void Profile(llvm::FoldingSetNodeID &ID) const {
184    ID.AddPointer(getAsOpaquePtr());
185  }
186};
187
188template<typename T, typename U>
189inline bool operator==(CanQual<T> x, CanQual<U> y) {
190  return x.getAsOpaquePtr() == y.getAsOpaquePtr();
191}
192
193template<typename T, typename U>
194inline bool operator!=(CanQual<T> x, CanQual<U> y) {
195  return x.getAsOpaquePtr() != y.getAsOpaquePtr();
196}
197
198/// \brief Represents a canonical, potentially-qualified type.
199typedef CanQual<Type> CanQualType;
200
201inline CanQualType Type::getCanonicalTypeUnqualified() const {
202  return CanQualType::CreateUnsafe(getCanonicalTypeInternal());
203}
204
205inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB,
206                                           CanQualType T) {
207  DB << static_cast<QualType>(T);
208  return DB;
209}
210
211//----------------------------------------------------------------------------//
212// Internal proxy classes used by canonical types
213//----------------------------------------------------------------------------//
214
215#define LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(Accessor)                    \
216CanQualType Accessor() const {                                           \
217return CanQualType::CreateUnsafe(this->getTypePtr()->Accessor());      \
218}
219
220#define LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(Type, Accessor)             \
221Type Accessor() const { return this->getTypePtr()->Accessor(); }
222
223/// \brief Base class of all canonical proxy types, which is responsible for
224/// storing the underlying canonical type and providing basic conversions.
225template<typename T>
226class CanProxyBase {
227protected:
228  CanQual<T> Stored;
229
230public:
231  /// \brief Retrieve the pointer to the underlying Type
232  const T *getTypePtr() const { return Stored.getTypePtr(); }
233
234  /// \brief Implicit conversion to the underlying pointer.
235  ///
236  /// Also provides the ability to use canonical type proxies in a Boolean
237  // context,e.g.,
238  /// @code
239  ///   if (CanQual<PointerType> Ptr = T->getAs<PointerType>()) { ... }
240  /// @endcode
241  operator const T*() const { return this->Stored.getTypePtrOrNull(); }
242
243  /// \brief Try to convert the given canonical type to a specific structural
244  /// type.
245  template<typename U> CanProxy<U> getAs() const {
246    return this->Stored.template getAs<U>();
247  }
248
249  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(Type::TypeClass, getTypeClass)
250
251  // Type predicates
252  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isObjectType)
253  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isIncompleteType)
254  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isIncompleteOrObjectType)
255  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isVariablyModifiedType)
256  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isIntegerType)
257  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isEnumeralType)
258  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isBooleanType)
259  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isCharType)
260  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isWideCharType)
261  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isIntegralType)
262  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isIntegralOrEnumerationType)
263  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isRealFloatingType)
264  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isComplexType)
265  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isAnyComplexType)
266  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isFloatingType)
267  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isRealType)
268  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isArithmeticType)
269  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isVoidType)
270  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isDerivedType)
271  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isScalarType)
272  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isAggregateType)
273  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isAnyPointerType)
274  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isVoidPointerType)
275  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isFunctionPointerType)
276  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isMemberFunctionPointerType)
277  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isClassType)
278  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isStructureType)
279  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isInterfaceType)
280  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isStructureOrClassType)
281  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isUnionType)
282  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isComplexIntegerType)
283  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isNullPtrType)
284  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isDependentType)
285  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isOverloadableType)
286  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isArrayType)
287  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, hasPointerRepresentation)
288  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, hasObjCPointerRepresentation)
289  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, hasIntegerRepresentation)
290  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, hasSignedIntegerRepresentation)
291  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, hasUnsignedIntegerRepresentation)
292  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, hasFloatingRepresentation)
293  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isPromotableIntegerType)
294  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isSignedIntegerType)
295  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isUnsignedIntegerType)
296  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isSignedIntegerOrEnumerationType)
297  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isUnsignedIntegerOrEnumerationType)
298  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isConstantSizeType)
299  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isSpecifierType)
300  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(CXXRecordDecl*, getAsCXXRecordDecl)
301
302  /// \brief Retrieve the proxy-adaptor type.
303  ///
304  /// This arrow operator is used when CanProxyAdaptor has been specialized
305  /// for the given type T. In that case, we reference members of the
306  /// CanProxyAdaptor specialization. Otherwise, this operator will be hidden
307  /// by the arrow operator in the primary CanProxyAdaptor template.
308  const CanProxyAdaptor<T> *operator->() const {
309    return static_cast<const CanProxyAdaptor<T> *>(this);
310  }
311};
312
313/// \brief Replacable canonical proxy adaptor class that provides the link
314/// between a canonical type and the accessors of the type.
315///
316/// The CanProxyAdaptor is a replaceable class template that is instantiated
317/// as part of each canonical proxy type. The primary template merely provides
318/// redirection to the underlying type (T), e.g., @c PointerType. One can
319/// provide specializations of this class template for each underlying type
320/// that provide accessors returning canonical types (@c CanQualType) rather
321/// than the more typical @c QualType, to propagate the notion of "canonical"
322/// through the system.
323template<typename T>
324struct CanProxyAdaptor : CanProxyBase<T> { };
325
326/// \brief Canonical proxy type returned when retrieving the members of a
327/// canonical type or as the result of the @c CanQual<T>::getAs member
328/// function.
329///
330/// The CanProxy type mainly exists as a proxy through which operator-> will
331/// look to either map down to a raw T* (e.g., PointerType*) or to a proxy
332/// type that provides canonical-type access to the fields of the type.
333template<typename T>
334class CanProxy : public CanProxyAdaptor<T> {
335public:
336  /// \brief Build a NULL proxy.
337  CanProxy() { }
338
339  /// \brief Build a proxy to the given canonical type.
340  CanProxy(CanQual<T> Stored) { this->Stored = Stored; }
341
342  /// \brief Implicit conversion to the stored canonical type.
343  operator CanQual<T>() const { return this->Stored; }
344};
345
346} // end namespace clang
347
348namespace llvm {
349
350/// Implement simplify_type for CanQual<T>, so that we can dyn_cast from
351/// CanQual<T> to a specific Type class. We're prefer isa/dyn_cast/cast/etc.
352/// to return smart pointer (proxies?).
353template<typename T>
354struct simplify_type< ::clang::CanQual<T> > {
355  typedef const T *SimpleType;
356  static SimpleType getSimplifiedValue(::clang::CanQual<T> Val) {
357    return Val.getTypePtr();
358  }
359};
360
361// Teach SmallPtrSet that CanQual<T> is "basically a pointer".
362template<typename T>
363class PointerLikeTypeTraits<clang::CanQual<T> > {
364public:
365  static inline void *getAsVoidPointer(clang::CanQual<T> P) {
366    return P.getAsOpaquePtr();
367  }
368  static inline clang::CanQual<T> getFromVoidPointer(void *P) {
369    return clang::CanQual<T>::getFromOpaquePtr(P);
370  }
371  // qualifier information is encoded in the low bits.
372  enum { NumLowBitsAvailable = 0 };
373};
374
375} // end namespace llvm
376
377namespace clang {
378
379//----------------------------------------------------------------------------//
380// Canonical proxy adaptors for canonical type nodes.
381//----------------------------------------------------------------------------//
382
383/// \brief Iterator adaptor that turns an iterator over canonical QualTypes
384/// into an iterator over CanQualTypes.
385template<typename InputIterator>
386class CanTypeIterator {
387  InputIterator Iter;
388
389public:
390  typedef CanQualType    value_type;
391  typedef value_type     reference;
392  typedef CanProxy<Type> pointer;
393  typedef typename std::iterator_traits<InputIterator>::difference_type
394    difference_type;
395  typedef typename std::iterator_traits<InputIterator>::iterator_category
396    iterator_category;
397
398  CanTypeIterator() : Iter() { }
399  explicit CanTypeIterator(InputIterator Iter) : Iter(Iter) { }
400
401  // Input iterator
402  reference operator*() const {
403    return CanQualType::CreateUnsafe(*Iter);
404  }
405
406  pointer operator->() const;
407
408  CanTypeIterator &operator++() {
409    ++Iter;
410    return *this;
411  }
412
413  CanTypeIterator operator++(int) {
414    CanTypeIterator Tmp(*this);
415    ++Iter;
416    return Tmp;
417  }
418
419  friend bool operator==(const CanTypeIterator& X, const CanTypeIterator &Y) {
420    return X.Iter == Y.Iter;
421  }
422  friend bool operator!=(const CanTypeIterator& X, const CanTypeIterator &Y) {
423    return X.Iter != Y.Iter;
424  }
425
426  // Bidirectional iterator
427  CanTypeIterator &operator--() {
428    --Iter;
429    return *this;
430  }
431
432  CanTypeIterator operator--(int) {
433    CanTypeIterator Tmp(*this);
434    --Iter;
435    return Tmp;
436  }
437
438  // Random access iterator
439  reference operator[](difference_type n) const {
440    return CanQualType::CreateUnsafe(Iter[n]);
441  }
442
443  CanTypeIterator &operator+=(difference_type n) {
444    Iter += n;
445    return *this;
446  }
447
448  CanTypeIterator &operator-=(difference_type n) {
449    Iter -= n;
450    return *this;
451  }
452
453  friend CanTypeIterator operator+(CanTypeIterator X, difference_type n) {
454    X += n;
455    return X;
456  }
457
458  friend CanTypeIterator operator+(difference_type n, CanTypeIterator X) {
459    X += n;
460    return X;
461  }
462
463  friend CanTypeIterator operator-(CanTypeIterator X, difference_type n) {
464    X -= n;
465    return X;
466  }
467
468  friend difference_type operator-(const CanTypeIterator &X,
469                                   const CanTypeIterator &Y) {
470    return X - Y;
471  }
472};
473
474template<>
475struct CanProxyAdaptor<ComplexType> : public CanProxyBase<ComplexType> {
476  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getElementType)
477};
478
479template<>
480struct CanProxyAdaptor<PointerType> : public CanProxyBase<PointerType> {
481  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getPointeeType)
482};
483
484template<>
485struct CanProxyAdaptor<BlockPointerType>
486  : public CanProxyBase<BlockPointerType> {
487  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getPointeeType)
488};
489
490template<>
491struct CanProxyAdaptor<ReferenceType> : public CanProxyBase<ReferenceType> {
492  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getPointeeType)
493};
494
495template<>
496struct CanProxyAdaptor<LValueReferenceType>
497  : public CanProxyBase<LValueReferenceType> {
498  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getPointeeType)
499};
500
501template<>
502struct CanProxyAdaptor<RValueReferenceType>
503  : public CanProxyBase<RValueReferenceType> {
504  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getPointeeType)
505};
506
507template<>
508struct CanProxyAdaptor<MemberPointerType>
509  : public CanProxyBase<MemberPointerType> {
510  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getPointeeType)
511  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(const Type *, getClass)
512};
513
514// CanProxyAdaptors for arrays are intentionally unimplemented because
515// they are not safe.
516template<> struct CanProxyAdaptor<ArrayType>;
517template<> struct CanProxyAdaptor<ConstantArrayType>;
518template<> struct CanProxyAdaptor<IncompleteArrayType>;
519template<> struct CanProxyAdaptor<VariableArrayType>;
520template<> struct CanProxyAdaptor<DependentSizedArrayType>;
521
522template<>
523struct CanProxyAdaptor<DependentSizedExtVectorType>
524  : public CanProxyBase<DependentSizedExtVectorType> {
525  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getElementType)
526  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(const Expr *, getSizeExpr)
527  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(SourceLocation, getAttributeLoc)
528};
529
530template<>
531struct CanProxyAdaptor<VectorType> : public CanProxyBase<VectorType> {
532  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getElementType)
533  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(unsigned, getNumElements)
534};
535
536template<>
537struct CanProxyAdaptor<ExtVectorType> : public CanProxyBase<ExtVectorType> {
538  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getElementType)
539  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(unsigned, getNumElements)
540};
541
542template<>
543struct CanProxyAdaptor<FunctionType> : public CanProxyBase<FunctionType> {
544  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getResultType)
545  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(FunctionType::ExtInfo, getExtInfo)
546};
547
548template<>
549struct CanProxyAdaptor<FunctionNoProtoType>
550  : public CanProxyBase<FunctionNoProtoType> {
551  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getResultType)
552  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(FunctionType::ExtInfo, getExtInfo)
553};
554
555template<>
556struct CanProxyAdaptor<FunctionProtoType>
557  : public CanProxyBase<FunctionProtoType> {
558  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getResultType)
559  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(FunctionType::ExtInfo, getExtInfo)
560  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(unsigned, getNumArgs)
561  CanQualType getArgType(unsigned i) const {
562    return CanQualType::CreateUnsafe(this->getTypePtr()->getArgType(i));
563  }
564
565  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isVariadic)
566  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(unsigned, getTypeQuals)
567
568  typedef CanTypeIterator<FunctionProtoType::arg_type_iterator>
569    arg_type_iterator;
570
571  arg_type_iterator arg_type_begin() const {
572    return arg_type_iterator(this->getTypePtr()->arg_type_begin());
573  }
574
575  arg_type_iterator arg_type_end() const {
576    return arg_type_iterator(this->getTypePtr()->arg_type_end());
577  }
578
579  // Note: canonical function types never have exception specifications
580};
581
582template<>
583struct CanProxyAdaptor<TypeOfType> : public CanProxyBase<TypeOfType> {
584  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getUnderlyingType)
585};
586
587template<>
588struct CanProxyAdaptor<DecltypeType> : public CanProxyBase<DecltypeType> {
589  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(Expr *, getUnderlyingExpr)
590  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getUnderlyingType)
591};
592
593template <>
594struct CanProxyAdaptor<UnaryTransformType>
595    : public CanProxyBase<UnaryTransformType> {
596  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getBaseType)
597  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getUnderlyingType)
598  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(UnaryTransformType::UTTKind, getUTTKind)
599};
600
601template<>
602struct CanProxyAdaptor<TagType> : public CanProxyBase<TagType> {
603  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(TagDecl *, getDecl)
604  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isBeingDefined)
605};
606
607template<>
608struct CanProxyAdaptor<RecordType> : public CanProxyBase<RecordType> {
609  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(RecordDecl *, getDecl)
610  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isBeingDefined)
611  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, hasConstFields)
612};
613
614template<>
615struct CanProxyAdaptor<EnumType> : public CanProxyBase<EnumType> {
616  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(EnumDecl *, getDecl)
617  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isBeingDefined)
618};
619
620template<>
621struct CanProxyAdaptor<TemplateTypeParmType>
622  : public CanProxyBase<TemplateTypeParmType> {
623  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(unsigned, getDepth)
624  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(unsigned, getIndex)
625  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isParameterPack)
626  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(TemplateTypeParmDecl *, getDecl)
627  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(IdentifierInfo *, getIdentifier)
628};
629
630template<>
631struct CanProxyAdaptor<ObjCObjectType>
632  : public CanProxyBase<ObjCObjectType> {
633  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getBaseType)
634  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(const ObjCInterfaceDecl *,
635                                      getInterface)
636  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isObjCUnqualifiedId)
637  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isObjCUnqualifiedClass)
638  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isObjCQualifiedId)
639  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isObjCQualifiedClass)
640
641  typedef ObjCObjectPointerType::qual_iterator qual_iterator;
642  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(qual_iterator, qual_begin)
643  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(qual_iterator, qual_end)
644  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, qual_empty)
645  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(unsigned, getNumProtocols)
646};
647
648template<>
649struct CanProxyAdaptor<ObjCObjectPointerType>
650  : public CanProxyBase<ObjCObjectPointerType> {
651  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getPointeeType)
652  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(const ObjCInterfaceType *,
653                                      getInterfaceType)
654  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isObjCIdType)
655  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isObjCClassType)
656  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isObjCQualifiedIdType)
657  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, isObjCQualifiedClassType)
658
659  typedef ObjCObjectPointerType::qual_iterator qual_iterator;
660  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(qual_iterator, qual_begin)
661  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(qual_iterator, qual_end)
662  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(bool, qual_empty)
663  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(unsigned, getNumProtocols)
664};
665
666//----------------------------------------------------------------------------//
667// Method and function definitions
668//----------------------------------------------------------------------------//
669template<typename T>
670inline CanQual<T> CanQual<T>::getUnqualifiedType() const {
671  return CanQual<T>::CreateUnsafe(Stored.getLocalUnqualifiedType());
672}
673
674template<typename T>
675inline CanQual<Type> CanQual<T>::getNonReferenceType() const {
676  if (CanQual<ReferenceType> RefType = getAs<ReferenceType>())
677    return RefType->getPointeeType();
678  else
679    return *this;
680}
681
682template<typename T>
683CanQual<T> CanQual<T>::getFromOpaquePtr(void *Ptr) {
684  CanQual<T> Result;
685  Result.Stored = QualType::getFromOpaquePtr(Ptr);
686  assert((!Result || Result.Stored.getAsOpaquePtr() == (void*)-1 ||
687          Result.Stored.isCanonical()) && "Type is not canonical!");
688  return Result;
689}
690
691template<typename T>
692CanQual<T> CanQual<T>::CreateUnsafe(QualType Other) {
693  assert((Other.isNull() || Other.isCanonical()) && "Type is not canonical!");
694  assert((Other.isNull() || isa<T>(Other.getTypePtr())) &&
695         "Dynamic type does not meet the static type's requires");
696  CanQual<T> Result;
697  Result.Stored = Other;
698  return Result;
699}
700
701template<typename T>
702template<typename U>
703CanProxy<U> CanQual<T>::getAs() const {
704  ArrayType_cannot_be_used_with_getAs<U> at;
705  (void)at;
706
707  if (Stored.isNull())
708    return CanProxy<U>();
709
710  if (isa<U>(Stored.getTypePtr()))
711    return CanQual<U>::CreateUnsafe(Stored);
712
713  return CanProxy<U>();
714}
715
716template<typename T>
717template<typename U>
718CanProxy<U> CanQual<T>::castAs() const {
719  ArrayType_cannot_be_used_with_getAs<U> at;
720  (void)at;
721
722  assert(!Stored.isNull() && isa<U>(Stored.getTypePtr()));
723  return CanQual<U>::CreateUnsafe(Stored);
724}
725
726template<typename T>
727CanProxy<T> CanQual<T>::operator->() const {
728  return CanProxy<T>(*this);
729}
730
731template<typename InputIterator>
732typename CanTypeIterator<InputIterator>::pointer
733CanTypeIterator<InputIterator>::operator->() const {
734  return CanProxy<Type>(*this);
735}
736
737}
738
739
740#endif // LLVM_CLANG_AST_CANONICAL_TYPE_H
741