Type.h revision f82b4e85b1219295cad4b5851b035575bc293010
1868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The LLVM Compiler Infrastructure 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 51320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// This file is distributed under the University of Illinois Open Source 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// License. See LICENSE.TXT for details. 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//===----------------------------------------------------------------------===// 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 10c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// This file defines the Type interface and subclasses. 117d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles)// 127d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles)//===----------------------------------------------------------------------===// 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 14868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#ifndef LLVM_CLANG_AST_TYPE_H 15868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#define LLVM_CLANG_AST_TYPE_H 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 17f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "clang/Basic/Diagnostic.h" 18f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)#include "clang/Basic/IdentifierTable.h" 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "clang/Basic/Linkage.h" 201320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "clang/AST/NestedNameSpecifier.h" 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "clang/AST/TemplateName.h" 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "llvm/Support/Casting.h" 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "llvm/Support/type_traits.h" 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "llvm/ADT/APSInt.h" 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "llvm/ADT/FoldingSet.h" 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "llvm/ADT/PointerIntPair.h" 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "llvm/ADT/PointerUnion.h" 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using llvm::isa; 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using llvm::cast; 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using llvm::cast_or_null; 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using llvm::dyn_cast; 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using llvm::dyn_cast_or_null; 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace clang { 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) enum { 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) TypeAlignmentInBits = 3, 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) TypeAlignment = 1 << TypeAlignmentInBits 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class Type; 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class ExtQuals; 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class QualType; 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace llvm { 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) template <typename T> 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class PointerLikeTypeTraits; 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) template<> 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class PointerLikeTypeTraits< ::clang::Type*> { 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static inline ::clang::Type *getFromVoidPointer(void *P) { 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return static_cast< ::clang::Type*>(P); 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) template<> 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class PointerLikeTypeTraits< ::clang::ExtQuals*> { 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return static_cast< ::clang::ExtQuals*>(P); 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) template <> 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) struct isPodLike<clang::QualType> { static const bool value = true; }; 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace clang { 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class ASTContext; 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class TypedefDecl; 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class TemplateDecl; 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class TemplateTypeParmDecl; 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class NonTypeTemplateParmDecl; 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class TemplateTemplateParmDecl; 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class TagDecl; 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class RecordDecl; 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class CXXRecordDecl; 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class EnumDecl; 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class FieldDecl; 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class ObjCInterfaceDecl; 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class ObjCProtocolDecl; 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class ObjCMethodDecl; 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class UnresolvedUsingTypenameDecl; 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class Expr; 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class Stmt; 882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) class SourceLocation; 892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) class StmtIteratorBase; 902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) class TemplateArgument; 912a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) class TemplateArgumentLoc; 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class TemplateArgumentListInfo; 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class QualifiedNameType; 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) struct PrintingPolicy; 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Provide forward declarations for all of the *Type classes 971320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#define TYPE(Class, Base) class Class##Type; 98#include "clang/AST/TypeNodes.def" 99 100/// Qualifiers - The collection of all-type qualifiers we support. 101/// Clang supports five independent qualifiers: 102/// * C99: const, volatile, and restrict 103/// * Embedded C (TR18037): address spaces 104/// * Objective C: the GC attributes (none, weak, or strong) 105class Qualifiers { 106public: 107 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 108 Const = 0x1, 109 Restrict = 0x2, 110 Volatile = 0x4, 111 CVRMask = Const | Volatile | Restrict 112 }; 113 114 enum GC { 115 GCNone = 0, 116 Weak, 117 Strong 118 }; 119 120 enum { 121 /// The maximum supported address space number. 122 /// 24 bits should be enough for anyone. 123 MaxAddressSpace = 0xffffffu, 124 125 /// The width of the "fast" qualifier mask. 126 FastWidth = 2, 127 128 /// The fast qualifier mask. 129 FastMask = (1 << FastWidth) - 1 130 }; 131 132 Qualifiers() : Mask(0) {} 133 134 static Qualifiers fromFastMask(unsigned Mask) { 135 Qualifiers Qs; 136 Qs.addFastQualifiers(Mask); 137 return Qs; 138 } 139 140 static Qualifiers fromCVRMask(unsigned CVR) { 141 Qualifiers Qs; 142 Qs.addCVRQualifiers(CVR); 143 return Qs; 144 } 145 146 // Deserialize qualifiers from an opaque representation. 147 static Qualifiers fromOpaqueValue(unsigned opaque) { 148 Qualifiers Qs; 149 Qs.Mask = opaque; 150 return Qs; 151 } 152 153 // Serialize these qualifiers into an opaque representation. 154 unsigned getAsOpaqueValue() const { 155 return Mask; 156 } 157 158 bool hasConst() const { return Mask & Const; } 159 void setConst(bool flag) { 160 Mask = (Mask & ~Const) | (flag ? Const : 0); 161 } 162 void removeConst() { Mask &= ~Const; } 163 void addConst() { Mask |= Const; } 164 165 bool hasVolatile() const { return Mask & Volatile; } 166 void setVolatile(bool flag) { 167 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 168 } 169 void removeVolatile() { Mask &= ~Volatile; } 170 void addVolatile() { Mask |= Volatile; } 171 172 bool hasRestrict() const { return Mask & Restrict; } 173 void setRestrict(bool flag) { 174 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 175 } 176 void removeRestrict() { Mask &= ~Restrict; } 177 void addRestrict() { Mask |= Restrict; } 178 179 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 180 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 181 void setCVRQualifiers(unsigned mask) { 182 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 183 Mask = (Mask & ~CVRMask) | mask; 184 } 185 void removeCVRQualifiers(unsigned mask) { 186 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 187 Mask &= ~mask; 188 } 189 void removeCVRQualifiers() { 190 removeCVRQualifiers(CVRMask); 191 } 192 void addCVRQualifiers(unsigned mask) { 193 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 194 Mask |= mask; 195 } 196 197 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 198 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 199 void setObjCGCAttr(GC type) { 200 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 201 } 202 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 203 void addObjCGCAttr(GC type) { 204 assert(type); 205 setObjCGCAttr(type); 206 } 207 208 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 209 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 210 void setAddressSpace(unsigned space) { 211 assert(space <= MaxAddressSpace); 212 Mask = (Mask & ~AddressSpaceMask) 213 | (((uint32_t) space) << AddressSpaceShift); 214 } 215 void removeAddressSpace() { setAddressSpace(0); } 216 void addAddressSpace(unsigned space) { 217 assert(space); 218 setAddressSpace(space); 219 } 220 221 // Fast qualifiers are those that can be allocated directly 222 // on a QualType object. 223 bool hasFastQualifiers() const { return getFastQualifiers(); } 224 unsigned getFastQualifiers() const { return Mask & FastMask; } 225 void setFastQualifiers(unsigned mask) { 226 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 227 Mask = (Mask & ~FastMask) | mask; 228 } 229 void removeFastQualifiers(unsigned mask) { 230 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 231 Mask &= ~mask; 232 } 233 void removeFastQualifiers() { 234 removeFastQualifiers(FastMask); 235 } 236 void addFastQualifiers(unsigned mask) { 237 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 238 Mask |= mask; 239 } 240 241 /// hasNonFastQualifiers - Return true if the set contains any 242 /// qualifiers which require an ExtQuals node to be allocated. 243 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 244 Qualifiers getNonFastQualifiers() const { 245 Qualifiers Quals = *this; 246 Quals.setFastQualifiers(0); 247 return Quals; 248 } 249 250 /// hasQualifiers - Return true if the set contains any qualifiers. 251 bool hasQualifiers() const { return Mask; } 252 bool empty() const { return !Mask; } 253 254 /// \brief Add the qualifiers from the given set to this set. 255 void addQualifiers(Qualifiers Q) { 256 // If the other set doesn't have any non-boolean qualifiers, just 257 // bit-or it in. 258 if (!(Q.Mask & ~CVRMask)) 259 Mask |= Q.Mask; 260 else { 261 Mask |= (Q.Mask & CVRMask); 262 if (Q.hasAddressSpace()) 263 addAddressSpace(Q.getAddressSpace()); 264 if (Q.hasObjCGCAttr()) 265 addObjCGCAttr(Q.getObjCGCAttr()); 266 } 267 } 268 269 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 270 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 271 272 operator bool() const { return hasQualifiers(); } 273 274 Qualifiers &operator+=(Qualifiers R) { 275 addQualifiers(R); 276 return *this; 277 } 278 279 // Union two qualifier sets. If an enumerated qualifier appears 280 // in both sets, use the one from the right. 281 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 282 L += R; 283 return L; 284 } 285 286 std::string getAsString() const; 287 std::string getAsString(const PrintingPolicy &Policy) const { 288 std::string Buffer; 289 getAsStringInternal(Buffer, Policy); 290 return Buffer; 291 } 292 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 293 294 void Profile(llvm::FoldingSetNodeID &ID) const { 295 ID.AddInteger(Mask); 296 } 297 298private: 299 300 // bits: |0 1 2|3 .. 4|5 .. 31| 301 // |C R V|GCAttr|AddrSpace| 302 uint32_t Mask; 303 304 static const uint32_t GCAttrMask = 0x18; 305 static const uint32_t GCAttrShift = 3; 306 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 307 static const uint32_t AddressSpaceShift = 5; 308}; 309 310 311/// ExtQuals - We can encode up to three bits in the low bits of a 312/// type pointer, but there are many more type qualifiers that we want 313/// to be able to apply to an arbitrary type. Therefore we have this 314/// struct, intended to be heap-allocated and used by QualType to 315/// store qualifiers. 316/// 317/// The current design tags the 'const' and 'restrict' qualifiers in 318/// two low bits on the QualType pointer; a third bit records whether 319/// the pointer is an ExtQuals node. 'const' was chosen because it is 320/// orders of magnitude more common than the other two qualifiers, in 321/// both library and user code. It's relatively rare to see 322/// 'restrict' in user code, but many standard C headers are saturated 323/// with 'restrict' declarations, so that representing them efficiently 324/// is a critical goal of this representation. 325class ExtQuals : public llvm::FoldingSetNode { 326 // NOTE: changing the fast qualifiers should be straightforward as 327 // long as you don't make 'const' non-fast. 328 // 1. Qualifiers: 329 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 330 // Fast qualifiers must occupy the low-order bits. 331 // b) Update Qualifiers::FastWidth and FastMask. 332 // 2. QualType: 333 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 334 // b) Update remove{Volatile,Restrict}, defined near the end of 335 // this header. 336 // 3. ASTContext: 337 // a) Update get{Volatile,Restrict}Type. 338 339 /// Context - the context to which this set belongs. We save this 340 /// here so that QualifierCollector can use it to reapply extended 341 /// qualifiers to an arbitrary type without requiring a context to 342 /// be pushed through every single API dealing with qualifiers. 343 ASTContext& Context; 344 345 /// BaseType - the underlying type that this qualifies 346 const Type *BaseType; 347 348 /// Quals - the immutable set of qualifiers applied by this 349 /// node; always contains extended qualifiers. 350 Qualifiers Quals; 351 352public: 353 ExtQuals(ASTContext& Context, const Type *Base, Qualifiers Quals) 354 : Context(Context), BaseType(Base), Quals(Quals) 355 { 356 assert(Quals.hasNonFastQualifiers() 357 && "ExtQuals created with no fast qualifiers"); 358 assert(!Quals.hasFastQualifiers() 359 && "ExtQuals created with fast qualifiers"); 360 } 361 362 Qualifiers getQualifiers() const { return Quals; } 363 364 bool hasVolatile() const { return Quals.hasVolatile(); } 365 366 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 367 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 368 369 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 370 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 371 372 const Type *getBaseType() const { return BaseType; } 373 374 ASTContext &getContext() const { return Context; } 375 376public: 377 void Profile(llvm::FoldingSetNodeID &ID) const { 378 Profile(ID, getBaseType(), Quals); 379 } 380 static void Profile(llvm::FoldingSetNodeID &ID, 381 const Type *BaseType, 382 Qualifiers Quals) { 383 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 384 ID.AddPointer(BaseType); 385 Quals.Profile(ID); 386 } 387}; 388 389/// CallingConv - Specifies the calling convention that a function uses. 390enum CallingConv { 391 CC_Default, 392 CC_C, // __attribute__((cdecl)) 393 CC_X86StdCall, // __attribute__((stdcall)) 394 CC_X86FastCall // __attribute__((fastcall)) 395}; 396 397 398/// QualType - For efficiency, we don't store CV-qualified types as nodes on 399/// their own: instead each reference to a type stores the qualifiers. This 400/// greatly reduces the number of nodes we need to allocate for types (for 401/// example we only need one for 'int', 'const int', 'volatile int', 402/// 'const volatile int', etc). 403/// 404/// As an added efficiency bonus, instead of making this a pair, we 405/// just store the two bits we care about in the low bits of the 406/// pointer. To handle the packing/unpacking, we make QualType be a 407/// simple wrapper class that acts like a smart pointer. A third bit 408/// indicates whether there are extended qualifiers present, in which 409/// case the pointer points to a special structure. 410class QualType { 411 // Thankfully, these are efficiently composable. 412 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 413 Qualifiers::FastWidth> Value; 414 415 const ExtQuals *getExtQualsUnsafe() const { 416 return Value.getPointer().get<const ExtQuals*>(); 417 } 418 419 const Type *getTypePtrUnsafe() const { 420 return Value.getPointer().get<const Type*>(); 421 } 422 423 QualType getUnqualifiedTypeSlow() const; 424 425 friend class QualifierCollector; 426public: 427 QualType() {} 428 429 QualType(const Type *Ptr, unsigned Quals) 430 : Value(Ptr, Quals) {} 431 QualType(const ExtQuals *Ptr, unsigned Quals) 432 : Value(Ptr, Quals) {} 433 434 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 435 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 436 437 /// Retrieves a pointer to the underlying (unqualified) type. 438 /// This should really return a const Type, but it's not worth 439 /// changing all the users right now. 440 Type *getTypePtr() const { 441 if (hasLocalNonFastQualifiers()) 442 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 443 return const_cast<Type*>(getTypePtrUnsafe()); 444 } 445 446 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 447 static QualType getFromOpaquePtr(void *Ptr) { 448 QualType T; 449 T.Value.setFromOpaqueValue(Ptr); 450 return T; 451 } 452 453 Type &operator*() const { 454 return *getTypePtr(); 455 } 456 457 Type *operator->() const { 458 return getTypePtr(); 459 } 460 461 bool isCanonical() const; 462 bool isCanonicalAsParam() const; 463 464 /// isNull - Return true if this QualType doesn't point to a type yet. 465 bool isNull() const { 466 return Value.getPointer().isNull(); 467 } 468 469 /// \brief Determine whether this particular QualType instance has the 470 /// "const" qualifier set, without looking through typedefs that may have 471 /// added "const" at a different level. 472 bool isLocalConstQualified() const { 473 return (getLocalFastQualifiers() & Qualifiers::Const); 474 } 475 476 /// \brief Determine whether this type is const-qualified. 477 bool isConstQualified() const; 478 479 /// \brief Determine whether this particular QualType instance has the 480 /// "restrict" qualifier set, without looking through typedefs that may have 481 /// added "restrict" at a different level. 482 bool isLocalRestrictQualified() const { 483 return (getLocalFastQualifiers() & Qualifiers::Restrict); 484 } 485 486 /// \brief Determine whether this type is restrict-qualified. 487 bool isRestrictQualified() const; 488 489 /// \brief Determine whether this particular QualType instance has the 490 /// "volatile" qualifier set, without looking through typedefs that may have 491 /// added "volatile" at a different level. 492 bool isLocalVolatileQualified() const { 493 return (hasLocalNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 494 } 495 496 /// \brief Determine whether this type is volatile-qualified. 497 bool isVolatileQualified() const; 498 499 /// \brief Determine whether this particular QualType instance has any 500 /// qualifiers, without looking through any typedefs that might add 501 /// qualifiers at a different level. 502 bool hasLocalQualifiers() const { 503 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 504 } 505 506 /// \brief Determine whether this type has any qualifiers. 507 bool hasQualifiers() const; 508 509 /// \brief Determine whether this particular QualType instance has any 510 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 511 /// instance. 512 bool hasLocalNonFastQualifiers() const { 513 return Value.getPointer().is<const ExtQuals*>(); 514 } 515 516 /// \brief Retrieve the set of qualifiers local to this particular QualType 517 /// instance, not including any qualifiers acquired through typedefs or 518 /// other sugar. 519 Qualifiers getLocalQualifiers() const { 520 Qualifiers Quals; 521 if (hasLocalNonFastQualifiers()) 522 Quals = getExtQualsUnsafe()->getQualifiers(); 523 Quals.addFastQualifiers(getLocalFastQualifiers()); 524 return Quals; 525 } 526 527 /// \brief Retrieve the set of qualifiers applied to this type. 528 Qualifiers getQualifiers() const; 529 530 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 531 /// local to this particular QualType instance, not including any qualifiers 532 /// acquired through typedefs or other sugar. 533 unsigned getLocalCVRQualifiers() const { 534 unsigned CVR = getLocalFastQualifiers(); 535 if (isLocalVolatileQualified()) 536 CVR |= Qualifiers::Volatile; 537 return CVR; 538 } 539 540 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 541 /// applied to this type. 542 unsigned getCVRQualifiers() const; 543 544 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 545 /// applied to this type, looking through any number of unqualified array 546 /// types to their element types' qualifiers. 547 unsigned getCVRQualifiersThroughArrayTypes() const; 548 549 bool isConstant(ASTContext& Ctx) const { 550 return QualType::isConstant(*this, Ctx); 551 } 552 553 // Don't promise in the API that anything besides 'const' can be 554 // easily added. 555 556 /// addConst - add the specified type qualifier to this QualType. 557 void addConst() { 558 addFastQualifiers(Qualifiers::Const); 559 } 560 QualType withConst() const { 561 return withFastQualifiers(Qualifiers::Const); 562 } 563 564 void addFastQualifiers(unsigned TQs) { 565 assert(!(TQs & ~Qualifiers::FastMask) 566 && "non-fast qualifier bits set in mask!"); 567 Value.setInt(Value.getInt() | TQs); 568 } 569 570 // FIXME: The remove* functions are semantically broken, because they might 571 // not remove a qualifier stored on a typedef. Most of the with* functions 572 // have the same problem. 573 void removeConst(); 574 void removeVolatile(); 575 void removeRestrict(); 576 void removeCVRQualifiers(unsigned Mask); 577 578 void removeFastQualifiers() { Value.setInt(0); } 579 void removeFastQualifiers(unsigned Mask) { 580 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 581 Value.setInt(Value.getInt() & ~Mask); 582 } 583 584 // Creates a type with the given qualifiers in addition to any 585 // qualifiers already on this type. 586 QualType withFastQualifiers(unsigned TQs) const { 587 QualType T = *this; 588 T.addFastQualifiers(TQs); 589 return T; 590 } 591 592 // Creates a type with exactly the given fast qualifiers, removing 593 // any existing fast qualifiers. 594 QualType withExactFastQualifiers(unsigned TQs) const { 595 return withoutFastQualifiers().withFastQualifiers(TQs); 596 } 597 598 // Removes fast qualifiers, but leaves any extended qualifiers in place. 599 QualType withoutFastQualifiers() const { 600 QualType T = *this; 601 T.removeFastQualifiers(); 602 return T; 603 } 604 605 /// \brief Return this type with all of the instance-specific qualifiers 606 /// removed, but without removing any qualifiers that may have been applied 607 /// through typedefs. 608 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 609 610 /// \brief Return the unqualified form of the given type, which might be 611 /// desugared to eliminate qualifiers introduced via typedefs. 612 QualType getUnqualifiedType() const { 613 QualType T = getLocalUnqualifiedType(); 614 if (!T.hasQualifiers()) 615 return T; 616 617 return getUnqualifiedTypeSlow(); 618 } 619 620 bool isMoreQualifiedThan(QualType Other) const; 621 bool isAtLeastAsQualifiedAs(QualType Other) const; 622 QualType getNonReferenceType() const; 623 624 /// getDesugaredType - Return the specified type with any "sugar" removed from 625 /// the type. This takes off typedefs, typeof's etc. If the outer level of 626 /// the type is already concrete, it returns it unmodified. This is similar 627 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 628 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 629 /// concrete. 630 /// 631 /// Qualifiers are left in place. 632 QualType getDesugaredType() const { 633 return QualType::getDesugaredType(*this); 634 } 635 636 /// operator==/!= - Indicate whether the specified types and qualifiers are 637 /// identical. 638 friend bool operator==(const QualType &LHS, const QualType &RHS) { 639 return LHS.Value == RHS.Value; 640 } 641 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 642 return LHS.Value != RHS.Value; 643 } 644 std::string getAsString() const; 645 646 std::string getAsString(const PrintingPolicy &Policy) const { 647 std::string S; 648 getAsStringInternal(S, Policy); 649 return S; 650 } 651 void getAsStringInternal(std::string &Str, 652 const PrintingPolicy &Policy) const; 653 654 void dump(const char *s) const; 655 void dump() const; 656 657 void Profile(llvm::FoldingSetNodeID &ID) const { 658 ID.AddPointer(getAsOpaquePtr()); 659 } 660 661 /// getAddressSpace - Return the address space of this type. 662 inline unsigned getAddressSpace() const; 663 664 /// GCAttrTypesAttr - Returns gc attribute of this type. 665 inline Qualifiers::GC getObjCGCAttr() const; 666 667 /// isObjCGCWeak true when Type is objc's weak. 668 bool isObjCGCWeak() const { 669 return getObjCGCAttr() == Qualifiers::Weak; 670 } 671 672 /// isObjCGCStrong true when Type is objc's strong. 673 bool isObjCGCStrong() const { 674 return getObjCGCAttr() == Qualifiers::Strong; 675 } 676 677 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 678 /// false otherwise. 679 bool getNoReturnAttr() const; 680 681 /// getCallConv - Returns the calling convention of the type if the type 682 /// is a function type, CC_Default otherwise. 683 CallingConv getCallConv() const; 684 685private: 686 // These methods are implemented in a separate translation unit; 687 // "static"-ize them to avoid creating temporary QualTypes in the 688 // caller. 689 static bool isConstant(QualType T, ASTContext& Ctx); 690 static QualType getDesugaredType(QualType T); 691}; 692 693} // end clang. 694 695namespace llvm { 696/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 697/// to a specific Type class. 698template<> struct simplify_type<const ::clang::QualType> { 699 typedef ::clang::Type* SimpleType; 700 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 701 return Val.getTypePtr(); 702 } 703}; 704template<> struct simplify_type< ::clang::QualType> 705 : public simplify_type<const ::clang::QualType> {}; 706 707// Teach SmallPtrSet that QualType is "basically a pointer". 708template<> 709class PointerLikeTypeTraits<clang::QualType> { 710public: 711 static inline void *getAsVoidPointer(clang::QualType P) { 712 return P.getAsOpaquePtr(); 713 } 714 static inline clang::QualType getFromVoidPointer(void *P) { 715 return clang::QualType::getFromOpaquePtr(P); 716 } 717 // Various qualifiers go in low bits. 718 enum { NumLowBitsAvailable = 0 }; 719}; 720 721} // end namespace llvm 722 723namespace clang { 724 725/// Type - This is the base class of the type hierarchy. A central concept 726/// with types is that each type always has a canonical type. A canonical type 727/// is the type with any typedef names stripped out of it or the types it 728/// references. For example, consider: 729/// 730/// typedef int foo; 731/// typedef foo* bar; 732/// 'int *' 'foo *' 'bar' 733/// 734/// There will be a Type object created for 'int'. Since int is canonical, its 735/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 736/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 737/// there is a PointerType that represents 'int*', which, like 'int', is 738/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 739/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 740/// is also 'int*'. 741/// 742/// Non-canonical types are useful for emitting diagnostics, without losing 743/// information about typedefs being used. Canonical types are useful for type 744/// comparisons (they allow by-pointer equality tests) and useful for reasoning 745/// about whether something has a particular form (e.g. is a function type), 746/// because they implicitly, recursively, strip all typedefs out of a type. 747/// 748/// Types, once created, are immutable. 749/// 750class Type { 751public: 752 enum TypeClass { 753#define TYPE(Class, Base) Class, 754#define ABSTRACT_TYPE(Class, Base) 755#include "clang/AST/TypeNodes.def" 756 TagFirst = Record, TagLast = Enum 757 }; 758 759protected: 760 enum { TypeClassBitSize = 6 }; 761 762private: 763 QualType CanonicalType; 764 765 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 766 bool Dependent : 1; 767 768 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 769 /// Note that this should stay at the end of the ivars for Type so that 770 /// subclasses can pack their bitfields into the same word. 771 unsigned TC : TypeClassBitSize; 772 773 Type(const Type&); // DO NOT IMPLEMENT. 774 void operator=(const Type&); // DO NOT IMPLEMENT. 775protected: 776 // silence VC++ warning C4355: 'this' : used in base member initializer list 777 Type *this_() { return this; } 778 Type(TypeClass tc, QualType Canonical, bool dependent) 779 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 780 Dependent(dependent), TC(tc) {} 781 virtual ~Type() {} 782 virtual void Destroy(ASTContext& C); 783 friend class ASTContext; 784 785public: 786 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 787 788 bool isCanonicalUnqualified() const { 789 return CanonicalType.getTypePtr() == this; 790 } 791 792 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 793 /// object types, function types, and incomplete types. 794 795 /// \brief Determines whether the type describes an object in memory. 796 /// 797 /// Note that this definition of object type corresponds to the C++ 798 /// definition of object type, which includes incomplete types, as 799 /// opposed to the C definition (which does not include incomplete 800 /// types). 801 bool isObjectType() const; 802 803 /// isIncompleteType - Return true if this is an incomplete type. 804 /// A type that can describe objects, but which lacks information needed to 805 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 806 /// routine will need to determine if the size is actually required. 807 bool isIncompleteType() const; 808 809 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 810 /// type, in other words, not a function type. 811 bool isIncompleteOrObjectType() const { 812 return !isFunctionType(); 813 } 814 815 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 816 bool isPODType() const; 817 818 /// isLiteralType - Return true if this is a literal type 819 /// (C++0x [basic.types]p10) 820 bool isLiteralType() const; 821 822 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 823 /// types that have a non-constant expression. This does not include "[]". 824 bool isVariablyModifiedType() const; 825 826 /// Helper methods to distinguish type categories. All type predicates 827 /// operate on the canonical type, ignoring typedefs and qualifiers. 828 829 /// isSpecificBuiltinType - Test for a particular builtin type. 830 bool isSpecificBuiltinType(unsigned K) const; 831 832 /// isIntegerType() does *not* include complex integers (a GCC extension). 833 /// isComplexIntegerType() can be used to test for complex integers. 834 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 835 bool isEnumeralType() const; 836 bool isBooleanType() const; 837 bool isCharType() const; 838 bool isWideCharType() const; 839 bool isAnyCharacterType() const; 840 bool isIntegralType() const; 841 842 /// Floating point categories. 843 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 844 /// isComplexType() does *not* include complex integers (a GCC extension). 845 /// isComplexIntegerType() can be used to test for complex integers. 846 bool isComplexType() const; // C99 6.2.5p11 (complex) 847 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 848 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 849 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 850 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 851 bool isVoidType() const; // C99 6.2.5p19 852 bool isDerivedType() const; // C99 6.2.5p20 853 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 854 bool isAggregateType() const; 855 856 // Type Predicates: Check to see if this type is structurally the specified 857 // type, ignoring typedefs and qualifiers. 858 bool isFunctionType() const; 859 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 860 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 861 bool isPointerType() const; 862 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 863 bool isBlockPointerType() const; 864 bool isVoidPointerType() const; 865 bool isReferenceType() const; 866 bool isLValueReferenceType() const; 867 bool isRValueReferenceType() const; 868 bool isFunctionPointerType() const; 869 bool isMemberPointerType() const; 870 bool isMemberFunctionPointerType() const; 871 bool isArrayType() const; 872 bool isConstantArrayType() const; 873 bool isIncompleteArrayType() const; 874 bool isVariableArrayType() const; 875 bool isDependentSizedArrayType() const; 876 bool isRecordType() const; 877 bool isClassType() const; 878 bool isStructureType() const; 879 bool isUnionType() const; 880 bool isComplexIntegerType() const; // GCC _Complex integer type. 881 bool isVectorType() const; // GCC vector type. 882 bool isExtVectorType() const; // Extended vector type. 883 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 884 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 885 // for the common case. 886 bool isObjCInterfaceType() const; // NSString or NSString<foo> 887 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 888 bool isObjCQualifiedIdType() const; // id<foo> 889 bool isObjCQualifiedClassType() const; // Class<foo> 890 bool isObjCIdType() const; // id 891 bool isObjCClassType() const; // Class 892 bool isObjCSelType() const; // Class 893 bool isObjCBuiltinType() const; // 'id' or 'Class' 894 bool isTemplateTypeParmType() const; // C++ template type parameter 895 bool isNullPtrType() const; // C++0x nullptr_t 896 897 /// isDependentType - Whether this type is a dependent type, meaning 898 /// that its definition somehow depends on a template parameter 899 /// (C++ [temp.dep.type]). 900 bool isDependentType() const { return Dependent; } 901 bool isOverloadableType() const; 902 903 /// hasPointerRepresentation - Whether this type is represented 904 /// natively as a pointer; this includes pointers, references, block 905 /// pointers, and Objective-C interface, qualified id, and qualified 906 /// interface types, as well as nullptr_t. 907 bool hasPointerRepresentation() const; 908 909 /// hasObjCPointerRepresentation - Whether this type can represent 910 /// an objective pointer type for the purpose of GC'ability 911 bool hasObjCPointerRepresentation() const; 912 913 // Type Checking Functions: Check to see if this type is structurally the 914 // specified type, ignoring typedefs and qualifiers, and return a pointer to 915 // the best type we can. 916 const RecordType *getAsStructureType() const; 917 /// NOTE: getAs*ArrayType are methods on ASTContext. 918 const RecordType *getAsUnionType() const; 919 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 920 // The following is a convenience method that returns an ObjCObjectPointerType 921 // for object declared using an interface. 922 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 923 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 924 const ObjCInterfaceType *getAsObjCQualifiedInterfaceType() const; 925 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 926 927 // Member-template getAs<specific type>'. This scheme will eventually 928 // replace the specific getAsXXXX methods above. 929 // 930 // There are some specializations of this member template listed 931 // immediately following this class. 932 template <typename T> const T *getAs() const; 933 934 /// getAsPointerToObjCInterfaceType - If this is a pointer to an ObjC 935 /// interface, return the interface type, otherwise return null. 936 const ObjCInterfaceType *getAsPointerToObjCInterfaceType() const; 937 938 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 939 /// element type of the array, potentially with type qualifiers missing. 940 /// This method should never be used when type qualifiers are meaningful. 941 const Type *getArrayElementTypeNoTypeQual() const; 942 943 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 944 /// pointer, this returns the respective pointee. 945 QualType getPointeeType() const; 946 947 /// getUnqualifiedDesugaredType() - Return the specified type with 948 /// any "sugar" removed from the type, removing any typedefs, 949 /// typeofs, etc., as well as any qualifiers. 950 const Type *getUnqualifiedDesugaredType() const; 951 952 /// More type predicates useful for type checking/promotion 953 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 954 955 /// isSignedIntegerType - Return true if this is an integer type that is 956 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 957 /// an enum decl which has a signed representation, or a vector of signed 958 /// integer element type. 959 bool isSignedIntegerType() const; 960 961 /// isUnsignedIntegerType - Return true if this is an integer type that is 962 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 963 /// decl which has an unsigned representation, or a vector of unsigned integer 964 /// element type. 965 bool isUnsignedIntegerType() const; 966 967 /// isConstantSizeType - Return true if this is not a variable sized type, 968 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 969 /// incomplete types. 970 bool isConstantSizeType() const; 971 972 /// isSpecifierType - Returns true if this type can be represented by some 973 /// set of type specifiers. 974 bool isSpecifierType() const; 975 976 const char *getTypeClassName() const; 977 978 /// \brief Determine the linkage of this type. 979 virtual Linkage getLinkage() const; 980 981 QualType getCanonicalTypeInternal() const { return CanonicalType; } 982 void dump() const; 983 static bool classof(const Type *) { return true; } 984}; 985 986template <> inline const TypedefType *Type::getAs() const { 987 return dyn_cast<TypedefType>(this); 988} 989 990// We can do canonical leaf types faster, because we don't have to 991// worry about preserving child type decoration. 992#define TYPE(Class, Base) 993#define LEAF_TYPE(Class) \ 994template <> inline const Class##Type *Type::getAs() const { \ 995 return dyn_cast<Class##Type>(CanonicalType); \ 996} 997#include "clang/AST/TypeNodes.def" 998 999 1000/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1001/// types are always canonical and have a literal name field. 1002class BuiltinType : public Type { 1003public: 1004 enum Kind { 1005 Void, 1006 1007 Bool, // This is bool and/or _Bool. 1008 Char_U, // This is 'char' for targets where char is unsigned. 1009 UChar, // This is explicitly qualified unsigned char. 1010 Char16, // This is 'char16_t' for C++. 1011 Char32, // This is 'char32_t' for C++. 1012 UShort, 1013 UInt, 1014 ULong, 1015 ULongLong, 1016 UInt128, // __uint128_t 1017 1018 Char_S, // This is 'char' for targets where char is signed. 1019 SChar, // This is explicitly qualified signed char. 1020 WChar, // This is 'wchar_t' for C++. 1021 Short, 1022 Int, 1023 Long, 1024 LongLong, 1025 Int128, // __int128_t 1026 1027 Float, Double, LongDouble, 1028 1029 NullPtr, // This is the type of C++0x 'nullptr'. 1030 1031 Overload, // This represents the type of an overloaded function declaration. 1032 Dependent, // This represents the type of a type-dependent expression. 1033 1034 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1035 // that has not been deduced yet. 1036 ObjCId, // This represents the ObjC 'id' type. 1037 ObjCClass, // This represents the ObjC 'Class' type. 1038 ObjCSel // This represents the ObjC 'SEL' type. 1039 }; 1040private: 1041 Kind TypeKind; 1042public: 1043 BuiltinType(Kind K) 1044 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 1045 TypeKind(K) {} 1046 1047 Kind getKind() const { return TypeKind; } 1048 const char *getName(const LangOptions &LO) const; 1049 1050 bool isSugared() const { return false; } 1051 QualType desugar() const { return QualType(this, 0); } 1052 1053 bool isInteger() const { 1054 return TypeKind >= Bool && TypeKind <= Int128; 1055 } 1056 1057 bool isSignedInteger() const { 1058 return TypeKind >= Char_S && TypeKind <= Int128; 1059 } 1060 1061 bool isUnsignedInteger() const { 1062 return TypeKind >= Bool && TypeKind <= UInt128; 1063 } 1064 1065 bool isFloatingPoint() const { 1066 return TypeKind >= Float && TypeKind <= LongDouble; 1067 } 1068 1069 virtual Linkage getLinkage() const; 1070 1071 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1072 static bool classof(const BuiltinType *) { return true; } 1073}; 1074 1075/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1076/// types (_Complex float etc) as well as the GCC integer complex extensions. 1077/// 1078class ComplexType : public Type, public llvm::FoldingSetNode { 1079 QualType ElementType; 1080 ComplexType(QualType Element, QualType CanonicalPtr) : 1081 Type(Complex, CanonicalPtr, Element->isDependentType()), 1082 ElementType(Element) { 1083 } 1084 friend class ASTContext; // ASTContext creates these. 1085public: 1086 QualType getElementType() const { return ElementType; } 1087 1088 bool isSugared() const { return false; } 1089 QualType desugar() const { return QualType(this, 0); } 1090 1091 void Profile(llvm::FoldingSetNodeID &ID) { 1092 Profile(ID, getElementType()); 1093 } 1094 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1095 ID.AddPointer(Element.getAsOpaquePtr()); 1096 } 1097 1098 virtual Linkage getLinkage() const; 1099 1100 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1101 static bool classof(const ComplexType *) { return true; } 1102}; 1103 1104/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1105/// 1106class PointerType : public Type, public llvm::FoldingSetNode { 1107 QualType PointeeType; 1108 1109 PointerType(QualType Pointee, QualType CanonicalPtr) : 1110 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1111 } 1112 friend class ASTContext; // ASTContext creates these. 1113public: 1114 1115 QualType getPointeeType() const { return PointeeType; } 1116 1117 bool isSugared() const { return false; } 1118 QualType desugar() const { return QualType(this, 0); } 1119 1120 void Profile(llvm::FoldingSetNodeID &ID) { 1121 Profile(ID, getPointeeType()); 1122 } 1123 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1124 ID.AddPointer(Pointee.getAsOpaquePtr()); 1125 } 1126 1127 virtual Linkage getLinkage() const; 1128 1129 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1130 static bool classof(const PointerType *) { return true; } 1131}; 1132 1133/// BlockPointerType - pointer to a block type. 1134/// This type is to represent types syntactically represented as 1135/// "void (^)(int)", etc. Pointee is required to always be a function type. 1136/// 1137class BlockPointerType : public Type, public llvm::FoldingSetNode { 1138 QualType PointeeType; // Block is some kind of pointer type 1139 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1140 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1141 PointeeType(Pointee) { 1142 } 1143 friend class ASTContext; // ASTContext creates these. 1144public: 1145 1146 // Get the pointee type. Pointee is required to always be a function type. 1147 QualType getPointeeType() const { return PointeeType; } 1148 1149 bool isSugared() const { return false; } 1150 QualType desugar() const { return QualType(this, 0); } 1151 1152 void Profile(llvm::FoldingSetNodeID &ID) { 1153 Profile(ID, getPointeeType()); 1154 } 1155 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1156 ID.AddPointer(Pointee.getAsOpaquePtr()); 1157 } 1158 1159 virtual Linkage getLinkage() const; 1160 1161 static bool classof(const Type *T) { 1162 return T->getTypeClass() == BlockPointer; 1163 } 1164 static bool classof(const BlockPointerType *) { return true; } 1165}; 1166 1167/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1168/// 1169class ReferenceType : public Type, public llvm::FoldingSetNode { 1170 QualType PointeeType; 1171 1172 /// True if the type was originally spelled with an lvalue sigil. 1173 /// This is never true of rvalue references but can also be false 1174 /// on lvalue references because of C++0x [dcl.typedef]p9, 1175 /// as follows: 1176 /// 1177 /// typedef int &ref; // lvalue, spelled lvalue 1178 /// typedef int &&rvref; // rvalue 1179 /// ref &a; // lvalue, inner ref, spelled lvalue 1180 /// ref &&a; // lvalue, inner ref 1181 /// rvref &a; // lvalue, inner ref, spelled lvalue 1182 /// rvref &&a; // rvalue, inner ref 1183 bool SpelledAsLValue; 1184 1185 /// True if the inner type is a reference type. This only happens 1186 /// in non-canonical forms. 1187 bool InnerRef; 1188 1189protected: 1190 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1191 bool SpelledAsLValue) : 1192 Type(tc, CanonicalRef, Referencee->isDependentType()), 1193 PointeeType(Referencee), SpelledAsLValue(SpelledAsLValue), 1194 InnerRef(Referencee->isReferenceType()) { 1195 } 1196public: 1197 bool isSpelledAsLValue() const { return SpelledAsLValue; } 1198 1199 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1200 QualType getPointeeType() const { 1201 // FIXME: this might strip inner qualifiers; okay? 1202 const ReferenceType *T = this; 1203 while (T->InnerRef) 1204 T = T->PointeeType->getAs<ReferenceType>(); 1205 return T->PointeeType; 1206 } 1207 1208 void Profile(llvm::FoldingSetNodeID &ID) { 1209 Profile(ID, PointeeType, SpelledAsLValue); 1210 } 1211 static void Profile(llvm::FoldingSetNodeID &ID, 1212 QualType Referencee, 1213 bool SpelledAsLValue) { 1214 ID.AddPointer(Referencee.getAsOpaquePtr()); 1215 ID.AddBoolean(SpelledAsLValue); 1216 } 1217 1218 virtual Linkage getLinkage() const; 1219 1220 static bool classof(const Type *T) { 1221 return T->getTypeClass() == LValueReference || 1222 T->getTypeClass() == RValueReference; 1223 } 1224 static bool classof(const ReferenceType *) { return true; } 1225}; 1226 1227/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1228/// 1229class LValueReferenceType : public ReferenceType { 1230 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1231 bool SpelledAsLValue) : 1232 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1233 {} 1234 friend class ASTContext; // ASTContext creates these 1235public: 1236 bool isSugared() const { return false; } 1237 QualType desugar() const { return QualType(this, 0); } 1238 1239 static bool classof(const Type *T) { 1240 return T->getTypeClass() == LValueReference; 1241 } 1242 static bool classof(const LValueReferenceType *) { return true; } 1243}; 1244 1245/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1246/// 1247class RValueReferenceType : public ReferenceType { 1248 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1249 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1250 } 1251 friend class ASTContext; // ASTContext creates these 1252public: 1253 bool isSugared() const { return false; } 1254 QualType desugar() const { return QualType(this, 0); } 1255 1256 static bool classof(const Type *T) { 1257 return T->getTypeClass() == RValueReference; 1258 } 1259 static bool classof(const RValueReferenceType *) { return true; } 1260}; 1261 1262/// MemberPointerType - C++ 8.3.3 - Pointers to members 1263/// 1264class MemberPointerType : public Type, public llvm::FoldingSetNode { 1265 QualType PointeeType; 1266 /// The class of which the pointee is a member. Must ultimately be a 1267 /// RecordType, but could be a typedef or a template parameter too. 1268 const Type *Class; 1269 1270 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1271 Type(MemberPointer, CanonicalPtr, 1272 Cls->isDependentType() || Pointee->isDependentType()), 1273 PointeeType(Pointee), Class(Cls) { 1274 } 1275 friend class ASTContext; // ASTContext creates these. 1276public: 1277 1278 QualType getPointeeType() const { return PointeeType; } 1279 1280 const Type *getClass() const { return Class; } 1281 1282 bool isSugared() const { return false; } 1283 QualType desugar() const { return QualType(this, 0); } 1284 1285 void Profile(llvm::FoldingSetNodeID &ID) { 1286 Profile(ID, getPointeeType(), getClass()); 1287 } 1288 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1289 const Type *Class) { 1290 ID.AddPointer(Pointee.getAsOpaquePtr()); 1291 ID.AddPointer(Class); 1292 } 1293 1294 virtual Linkage getLinkage() const; 1295 1296 static bool classof(const Type *T) { 1297 return T->getTypeClass() == MemberPointer; 1298 } 1299 static bool classof(const MemberPointerType *) { return true; } 1300}; 1301 1302/// ArrayType - C99 6.7.5.2 - Array Declarators. 1303/// 1304class ArrayType : public Type, public llvm::FoldingSetNode { 1305public: 1306 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1307 /// an array with a static size (e.g. int X[static 4]), or an array 1308 /// with a star size (e.g. int X[*]). 1309 /// 'static' is only allowed on function parameters. 1310 enum ArraySizeModifier { 1311 Normal, Static, Star 1312 }; 1313private: 1314 /// ElementType - The element type of the array. 1315 QualType ElementType; 1316 1317 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1318 /// NOTE: These fields are packed into the bitfields space in the Type class. 1319 unsigned SizeModifier : 2; 1320 1321 /// IndexTypeQuals - Capture qualifiers in declarations like: 1322 /// 'int X[static restrict 4]'. For function parameters only. 1323 unsigned IndexTypeQuals : 3; 1324 1325protected: 1326 // C++ [temp.dep.type]p1: 1327 // A type is dependent if it is... 1328 // - an array type constructed from any dependent type or whose 1329 // size is specified by a constant expression that is 1330 // value-dependent, 1331 ArrayType(TypeClass tc, QualType et, QualType can, 1332 ArraySizeModifier sm, unsigned tq) 1333 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1334 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1335 1336 friend class ASTContext; // ASTContext creates these. 1337public: 1338 QualType getElementType() const { return ElementType; } 1339 ArraySizeModifier getSizeModifier() const { 1340 return ArraySizeModifier(SizeModifier); 1341 } 1342 Qualifiers getIndexTypeQualifiers() const { 1343 return Qualifiers::fromCVRMask(IndexTypeQuals); 1344 } 1345 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1346 1347 virtual Linkage getLinkage() const; 1348 1349 static bool classof(const Type *T) { 1350 return T->getTypeClass() == ConstantArray || 1351 T->getTypeClass() == VariableArray || 1352 T->getTypeClass() == IncompleteArray || 1353 T->getTypeClass() == DependentSizedArray; 1354 } 1355 static bool classof(const ArrayType *) { return true; } 1356}; 1357 1358/// ConstantArrayType - This class represents the canonical version of 1359/// C arrays with a specified constant size. For example, the canonical 1360/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1361/// type is 'int' and the size is 404. 1362class ConstantArrayType : public ArrayType { 1363 llvm::APInt Size; // Allows us to unique the type. 1364 1365 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1366 ArraySizeModifier sm, unsigned tq) 1367 : ArrayType(ConstantArray, et, can, sm, tq), 1368 Size(size) {} 1369protected: 1370 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1371 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1372 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1373 friend class ASTContext; // ASTContext creates these. 1374public: 1375 const llvm::APInt &getSize() const { return Size; } 1376 bool isSugared() const { return false; } 1377 QualType desugar() const { return QualType(this, 0); } 1378 1379 void Profile(llvm::FoldingSetNodeID &ID) { 1380 Profile(ID, getElementType(), getSize(), 1381 getSizeModifier(), getIndexTypeCVRQualifiers()); 1382 } 1383 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1384 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1385 unsigned TypeQuals) { 1386 ID.AddPointer(ET.getAsOpaquePtr()); 1387 ID.AddInteger(ArraySize.getZExtValue()); 1388 ID.AddInteger(SizeMod); 1389 ID.AddInteger(TypeQuals); 1390 } 1391 static bool classof(const Type *T) { 1392 return T->getTypeClass() == ConstantArray; 1393 } 1394 static bool classof(const ConstantArrayType *) { return true; } 1395}; 1396 1397/// IncompleteArrayType - This class represents C arrays with an unspecified 1398/// size. For example 'int A[]' has an IncompleteArrayType where the element 1399/// type is 'int' and the size is unspecified. 1400class IncompleteArrayType : public ArrayType { 1401 1402 IncompleteArrayType(QualType et, QualType can, 1403 ArraySizeModifier sm, unsigned tq) 1404 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1405 friend class ASTContext; // ASTContext creates these. 1406public: 1407 bool isSugared() const { return false; } 1408 QualType desugar() const { return QualType(this, 0); } 1409 1410 static bool classof(const Type *T) { 1411 return T->getTypeClass() == IncompleteArray; 1412 } 1413 static bool classof(const IncompleteArrayType *) { return true; } 1414 1415 friend class StmtIteratorBase; 1416 1417 void Profile(llvm::FoldingSetNodeID &ID) { 1418 Profile(ID, getElementType(), getSizeModifier(), 1419 getIndexTypeCVRQualifiers()); 1420 } 1421 1422 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1423 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1424 ID.AddPointer(ET.getAsOpaquePtr()); 1425 ID.AddInteger(SizeMod); 1426 ID.AddInteger(TypeQuals); 1427 } 1428}; 1429 1430/// VariableArrayType - This class represents C arrays with a specified size 1431/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1432/// Since the size expression is an arbitrary expression, we store it as such. 1433/// 1434/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1435/// should not be: two lexically equivalent variable array types could mean 1436/// different things, for example, these variables do not have the same type 1437/// dynamically: 1438/// 1439/// void foo(int x) { 1440/// int Y[x]; 1441/// ++x; 1442/// int Z[x]; 1443/// } 1444/// 1445class VariableArrayType : public ArrayType { 1446 /// SizeExpr - An assignment expression. VLA's are only permitted within 1447 /// a function block. 1448 Stmt *SizeExpr; 1449 /// Brackets - The left and right array brackets. 1450 SourceRange Brackets; 1451 1452 VariableArrayType(QualType et, QualType can, Expr *e, 1453 ArraySizeModifier sm, unsigned tq, 1454 SourceRange brackets) 1455 : ArrayType(VariableArray, et, can, sm, tq), 1456 SizeExpr((Stmt*) e), Brackets(brackets) {} 1457 friend class ASTContext; // ASTContext creates these. 1458 virtual void Destroy(ASTContext& C); 1459 1460public: 1461 Expr *getSizeExpr() const { 1462 // We use C-style casts instead of cast<> here because we do not wish 1463 // to have a dependency of Type.h on Stmt.h/Expr.h. 1464 return (Expr*) SizeExpr; 1465 } 1466 SourceRange getBracketsRange() const { return Brackets; } 1467 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1468 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1469 1470 bool isSugared() const { return false; } 1471 QualType desugar() const { return QualType(this, 0); } 1472 1473 static bool classof(const Type *T) { 1474 return T->getTypeClass() == VariableArray; 1475 } 1476 static bool classof(const VariableArrayType *) { return true; } 1477 1478 friend class StmtIteratorBase; 1479 1480 void Profile(llvm::FoldingSetNodeID &ID) { 1481 assert(0 && "Cannnot unique VariableArrayTypes."); 1482 } 1483}; 1484 1485/// DependentSizedArrayType - This type represents an array type in 1486/// C++ whose size is a value-dependent expression. For example: 1487/// 1488/// \code 1489/// template<typename T, int Size> 1490/// class array { 1491/// T data[Size]; 1492/// }; 1493/// \endcode 1494/// 1495/// For these types, we won't actually know what the array bound is 1496/// until template instantiation occurs, at which point this will 1497/// become either a ConstantArrayType or a VariableArrayType. 1498class DependentSizedArrayType : public ArrayType { 1499 ASTContext &Context; 1500 1501 /// \brief An assignment expression that will instantiate to the 1502 /// size of the array. 1503 /// 1504 /// The expression itself might be NULL, in which case the array 1505 /// type will have its size deduced from an initializer. 1506 Stmt *SizeExpr; 1507 1508 /// Brackets - The left and right array brackets. 1509 SourceRange Brackets; 1510 1511 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1512 Expr *e, ArraySizeModifier sm, unsigned tq, 1513 SourceRange brackets) 1514 : ArrayType(DependentSizedArray, et, can, sm, tq), 1515 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1516 friend class ASTContext; // ASTContext creates these. 1517 virtual void Destroy(ASTContext& C); 1518 1519public: 1520 Expr *getSizeExpr() const { 1521 // We use C-style casts instead of cast<> here because we do not wish 1522 // to have a dependency of Type.h on Stmt.h/Expr.h. 1523 return (Expr*) SizeExpr; 1524 } 1525 SourceRange getBracketsRange() const { return Brackets; } 1526 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1527 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1528 1529 bool isSugared() const { return false; } 1530 QualType desugar() const { return QualType(this, 0); } 1531 1532 static bool classof(const Type *T) { 1533 return T->getTypeClass() == DependentSizedArray; 1534 } 1535 static bool classof(const DependentSizedArrayType *) { return true; } 1536 1537 friend class StmtIteratorBase; 1538 1539 1540 void Profile(llvm::FoldingSetNodeID &ID) { 1541 Profile(ID, Context, getElementType(), 1542 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1543 } 1544 1545 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1546 QualType ET, ArraySizeModifier SizeMod, 1547 unsigned TypeQuals, Expr *E); 1548}; 1549 1550/// DependentSizedExtVectorType - This type represent an extended vector type 1551/// where either the type or size is dependent. For example: 1552/// @code 1553/// template<typename T, int Size> 1554/// class vector { 1555/// typedef T __attribute__((ext_vector_type(Size))) type; 1556/// } 1557/// @endcode 1558class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1559 ASTContext &Context; 1560 Expr *SizeExpr; 1561 /// ElementType - The element type of the array. 1562 QualType ElementType; 1563 SourceLocation loc; 1564 1565 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1566 QualType can, Expr *SizeExpr, SourceLocation loc) 1567 : Type (DependentSizedExtVector, can, true), 1568 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1569 loc(loc) {} 1570 friend class ASTContext; 1571 virtual void Destroy(ASTContext& C); 1572 1573public: 1574 Expr *getSizeExpr() const { return SizeExpr; } 1575 QualType getElementType() const { return ElementType; } 1576 SourceLocation getAttributeLoc() const { return loc; } 1577 1578 bool isSugared() const { return false; } 1579 QualType desugar() const { return QualType(this, 0); } 1580 1581 static bool classof(const Type *T) { 1582 return T->getTypeClass() == DependentSizedExtVector; 1583 } 1584 static bool classof(const DependentSizedExtVectorType *) { return true; } 1585 1586 void Profile(llvm::FoldingSetNodeID &ID) { 1587 Profile(ID, Context, getElementType(), getSizeExpr()); 1588 } 1589 1590 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1591 QualType ElementType, Expr *SizeExpr); 1592}; 1593 1594 1595/// VectorType - GCC generic vector type. This type is created using 1596/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1597/// bytes. Since the constructor takes the number of vector elements, the 1598/// client is responsible for converting the size into the number of elements. 1599class VectorType : public Type, public llvm::FoldingSetNode { 1600protected: 1601 /// ElementType - The element type of the vector. 1602 QualType ElementType; 1603 1604 /// NumElements - The number of elements in the vector. 1605 unsigned NumElements; 1606 1607 VectorType(QualType vecType, unsigned nElements, QualType canonType) : 1608 Type(Vector, canonType, vecType->isDependentType()), 1609 ElementType(vecType), NumElements(nElements) {} 1610 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1611 QualType canonType) 1612 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1613 NumElements(nElements) {} 1614 friend class ASTContext; // ASTContext creates these. 1615public: 1616 1617 QualType getElementType() const { return ElementType; } 1618 unsigned getNumElements() const { return NumElements; } 1619 1620 bool isSugared() const { return false; } 1621 QualType desugar() const { return QualType(this, 0); } 1622 1623 void Profile(llvm::FoldingSetNodeID &ID) { 1624 Profile(ID, getElementType(), getNumElements(), getTypeClass()); 1625 } 1626 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1627 unsigned NumElements, TypeClass TypeClass) { 1628 ID.AddPointer(ElementType.getAsOpaquePtr()); 1629 ID.AddInteger(NumElements); 1630 ID.AddInteger(TypeClass); 1631 } 1632 1633 virtual Linkage getLinkage() const; 1634 1635 static bool classof(const Type *T) { 1636 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1637 } 1638 static bool classof(const VectorType *) { return true; } 1639}; 1640 1641/// ExtVectorType - Extended vector type. This type is created using 1642/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1643/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1644/// class enables syntactic extensions, like Vector Components for accessing 1645/// points, colors, and textures (modeled after OpenGL Shading Language). 1646class ExtVectorType : public VectorType { 1647 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1648 VectorType(ExtVector, vecType, nElements, canonType) {} 1649 friend class ASTContext; // ASTContext creates these. 1650public: 1651 static int getPointAccessorIdx(char c) { 1652 switch (c) { 1653 default: return -1; 1654 case 'x': return 0; 1655 case 'y': return 1; 1656 case 'z': return 2; 1657 case 'w': return 3; 1658 } 1659 } 1660 static int getNumericAccessorIdx(char c) { 1661 switch (c) { 1662 default: return -1; 1663 case '0': return 0; 1664 case '1': return 1; 1665 case '2': return 2; 1666 case '3': return 3; 1667 case '4': return 4; 1668 case '5': return 5; 1669 case '6': return 6; 1670 case '7': return 7; 1671 case '8': return 8; 1672 case '9': return 9; 1673 case 'A': 1674 case 'a': return 10; 1675 case 'B': 1676 case 'b': return 11; 1677 case 'C': 1678 case 'c': return 12; 1679 case 'D': 1680 case 'd': return 13; 1681 case 'E': 1682 case 'e': return 14; 1683 case 'F': 1684 case 'f': return 15; 1685 } 1686 } 1687 1688 static int getAccessorIdx(char c) { 1689 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1690 return getNumericAccessorIdx(c); 1691 } 1692 1693 bool isAccessorWithinNumElements(char c) const { 1694 if (int idx = getAccessorIdx(c)+1) 1695 return unsigned(idx-1) < NumElements; 1696 return false; 1697 } 1698 bool isSugared() const { return false; } 1699 QualType desugar() const { return QualType(this, 0); } 1700 1701 static bool classof(const Type *T) { 1702 return T->getTypeClass() == ExtVector; 1703 } 1704 static bool classof(const ExtVectorType *) { return true; } 1705}; 1706 1707/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1708/// class of FunctionNoProtoType and FunctionProtoType. 1709/// 1710class FunctionType : public Type { 1711 /// SubClassData - This field is owned by the subclass, put here to pack 1712 /// tightly with the ivars in Type. 1713 bool SubClassData : 1; 1714 1715 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1716 /// other bitfields. 1717 /// The qualifiers are part of FunctionProtoType because... 1718 /// 1719 /// C++ 8.3.5p4: The return type, the parameter type list and the 1720 /// cv-qualifier-seq, [...], are part of the function type. 1721 /// 1722 unsigned TypeQuals : 3; 1723 1724 /// NoReturn - Indicates if the function type is attribute noreturn. 1725 unsigned NoReturn : 1; 1726 1727 /// CallConv - The calling convention used by the function. 1728 unsigned CallConv : 2; 1729 1730 // The type returned by the function. 1731 QualType ResultType; 1732protected: 1733 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1734 unsigned typeQuals, QualType Canonical, bool Dependent, 1735 bool noReturn = false, CallingConv callConv = CC_Default) 1736 : Type(tc, Canonical, Dependent), 1737 SubClassData(SubclassInfo), TypeQuals(typeQuals), NoReturn(noReturn), 1738 CallConv(callConv), ResultType(res) {} 1739 bool getSubClassData() const { return SubClassData; } 1740 unsigned getTypeQuals() const { return TypeQuals; } 1741public: 1742 1743 QualType getResultType() const { return ResultType; } 1744 bool getNoReturnAttr() const { return NoReturn; } 1745 CallingConv getCallConv() const { return (CallingConv)CallConv; } 1746 1747 static bool classof(const Type *T) { 1748 return T->getTypeClass() == FunctionNoProto || 1749 T->getTypeClass() == FunctionProto; 1750 } 1751 static bool classof(const FunctionType *) { return true; } 1752}; 1753 1754/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1755/// no information available about its arguments. 1756class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1757 FunctionNoProtoType(QualType Result, QualType Canonical, 1758 bool NoReturn = false, CallingConv CallConv = CC_Default) 1759 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1760 /*Dependent=*/false, NoReturn, CallConv) {} 1761 friend class ASTContext; // ASTContext creates these. 1762public: 1763 // No additional state past what FunctionType provides. 1764 1765 bool isSugared() const { return false; } 1766 QualType desugar() const { return QualType(this, 0); } 1767 1768 void Profile(llvm::FoldingSetNodeID &ID) { 1769 Profile(ID, getResultType(), getNoReturnAttr(), getCallConv()); 1770 } 1771 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1772 bool NoReturn, CallingConv CallConv) { 1773 ID.AddInteger(CallConv); 1774 ID.AddInteger(NoReturn); 1775 ID.AddPointer(ResultType.getAsOpaquePtr()); 1776 } 1777 1778 virtual Linkage getLinkage() const; 1779 1780 static bool classof(const Type *T) { 1781 return T->getTypeClass() == FunctionNoProto; 1782 } 1783 static bool classof(const FunctionNoProtoType *) { return true; } 1784}; 1785 1786/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1787/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1788/// arguments, not as having a single void argument. Such a type can have an 1789/// exception specification, but this specification is not part of the canonical 1790/// type. 1791class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1792 /// hasAnyDependentType - Determine whether there are any dependent 1793 /// types within the arguments passed in. 1794 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1795 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1796 if (ArgArray[Idx]->isDependentType()) 1797 return true; 1798 1799 return false; 1800 } 1801 1802 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1803 bool isVariadic, unsigned typeQuals, bool hasExs, 1804 bool hasAnyExs, const QualType *ExArray, 1805 unsigned numExs, QualType Canonical, bool NoReturn, 1806 CallingConv CallConv) 1807 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1808 (Result->isDependentType() || 1809 hasAnyDependentType(ArgArray, numArgs)), NoReturn, 1810 CallConv), 1811 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1812 AnyExceptionSpec(hasAnyExs) { 1813 // Fill in the trailing argument array. 1814 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1815 for (unsigned i = 0; i != numArgs; ++i) 1816 ArgInfo[i] = ArgArray[i]; 1817 // Fill in the exception array. 1818 QualType *Ex = ArgInfo + numArgs; 1819 for (unsigned i = 0; i != numExs; ++i) 1820 Ex[i] = ExArray[i]; 1821 } 1822 1823 /// NumArgs - The number of arguments this function has, not counting '...'. 1824 unsigned NumArgs : 20; 1825 1826 /// NumExceptions - The number of types in the exception spec, if any. 1827 unsigned NumExceptions : 10; 1828 1829 /// HasExceptionSpec - Whether this function has an exception spec at all. 1830 bool HasExceptionSpec : 1; 1831 1832 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 1833 bool AnyExceptionSpec : 1; 1834 1835 /// ArgInfo - There is an variable size array after the class in memory that 1836 /// holds the argument types. 1837 1838 /// Exceptions - There is another variable size array after ArgInfo that 1839 /// holds the exception types. 1840 1841 friend class ASTContext; // ASTContext creates these. 1842 1843public: 1844 unsigned getNumArgs() const { return NumArgs; } 1845 QualType getArgType(unsigned i) const { 1846 assert(i < NumArgs && "Invalid argument number!"); 1847 return arg_type_begin()[i]; 1848 } 1849 1850 bool hasExceptionSpec() const { return HasExceptionSpec; } 1851 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 1852 unsigned getNumExceptions() const { return NumExceptions; } 1853 QualType getExceptionType(unsigned i) const { 1854 assert(i < NumExceptions && "Invalid exception number!"); 1855 return exception_begin()[i]; 1856 } 1857 bool hasEmptyExceptionSpec() const { 1858 return hasExceptionSpec() && !hasAnyExceptionSpec() && 1859 getNumExceptions() == 0; 1860 } 1861 1862 bool isVariadic() const { return getSubClassData(); } 1863 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 1864 1865 typedef const QualType *arg_type_iterator; 1866 arg_type_iterator arg_type_begin() const { 1867 return reinterpret_cast<const QualType *>(this+1); 1868 } 1869 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 1870 1871 typedef const QualType *exception_iterator; 1872 exception_iterator exception_begin() const { 1873 // exceptions begin where arguments end 1874 return arg_type_end(); 1875 } 1876 exception_iterator exception_end() const { 1877 return exception_begin() + NumExceptions; 1878 } 1879 1880 bool isSugared() const { return false; } 1881 QualType desugar() const { return QualType(this, 0); } 1882 1883 virtual Linkage getLinkage() const; 1884 1885 static bool classof(const Type *T) { 1886 return T->getTypeClass() == FunctionProto; 1887 } 1888 static bool classof(const FunctionProtoType *) { return true; } 1889 1890 void Profile(llvm::FoldingSetNodeID &ID); 1891 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 1892 arg_type_iterator ArgTys, unsigned NumArgs, 1893 bool isVariadic, unsigned TypeQuals, 1894 bool hasExceptionSpec, bool anyExceptionSpec, 1895 unsigned NumExceptions, exception_iterator Exs, 1896 bool NoReturn, CallingConv CallConv); 1897}; 1898 1899 1900/// \brief Represents the dependent type named by a dependently-scoped 1901/// typename using declaration, e.g. 1902/// using typename Base<T>::foo; 1903/// Template instantiation turns these into the underlying type. 1904class UnresolvedUsingType : public Type { 1905 UnresolvedUsingTypenameDecl *Decl; 1906 1907 UnresolvedUsingType(UnresolvedUsingTypenameDecl *D) 1908 : Type(UnresolvedUsing, QualType(), true), Decl(D) {} 1909 friend class ASTContext; // ASTContext creates these. 1910public: 1911 1912 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 1913 1914 bool isSugared() const { return false; } 1915 QualType desugar() const { return QualType(this, 0); } 1916 1917 static bool classof(const Type *T) { 1918 return T->getTypeClass() == UnresolvedUsing; 1919 } 1920 static bool classof(const UnresolvedUsingType *) { return true; } 1921 1922 void Profile(llvm::FoldingSetNodeID &ID) { 1923 return Profile(ID, Decl); 1924 } 1925 static void Profile(llvm::FoldingSetNodeID &ID, 1926 UnresolvedUsingTypenameDecl *D) { 1927 ID.AddPointer(D); 1928 } 1929}; 1930 1931 1932class TypedefType : public Type { 1933 TypedefDecl *Decl; 1934protected: 1935 TypedefType(TypeClass tc, TypedefDecl *D, QualType can) 1936 : Type(tc, can, can->isDependentType()), Decl(D) { 1937 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 1938 } 1939 friend class ASTContext; // ASTContext creates these. 1940public: 1941 1942 TypedefDecl *getDecl() const { return Decl; } 1943 1944 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 1945 /// potentially looking through *all* consecutive typedefs. This returns the 1946 /// sum of the type qualifiers, so if you have: 1947 /// typedef const int A; 1948 /// typedef volatile A B; 1949 /// looking through the typedefs for B will give you "const volatile A". 1950 QualType LookThroughTypedefs() const; 1951 1952 bool isSugared() const { return true; } 1953 QualType desugar() const; 1954 1955 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 1956 static bool classof(const TypedefType *) { return true; } 1957}; 1958 1959/// TypeOfExprType (GCC extension). 1960class TypeOfExprType : public Type { 1961 Expr *TOExpr; 1962 1963protected: 1964 TypeOfExprType(Expr *E, QualType can = QualType()); 1965 friend class ASTContext; // ASTContext creates these. 1966public: 1967 Expr *getUnderlyingExpr() const { return TOExpr; } 1968 1969 /// \brief Remove a single level of sugar. 1970 QualType desugar() const; 1971 1972 /// \brief Returns whether this type directly provides sugar. 1973 bool isSugared() const { return true; } 1974 1975 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 1976 static bool classof(const TypeOfExprType *) { return true; } 1977}; 1978 1979/// Subclass of TypeOfExprType that is used for canonical, dependent 1980/// typeof(expr) types. 1981class DependentTypeOfExprType 1982 : public TypeOfExprType, public llvm::FoldingSetNode { 1983 ASTContext &Context; 1984 1985public: 1986 DependentTypeOfExprType(ASTContext &Context, Expr *E) 1987 : TypeOfExprType(E), Context(Context) { } 1988 1989 bool isSugared() const { return false; } 1990 QualType desugar() const { return QualType(this, 0); } 1991 1992 void Profile(llvm::FoldingSetNodeID &ID) { 1993 Profile(ID, Context, getUnderlyingExpr()); 1994 } 1995 1996 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1997 Expr *E); 1998}; 1999 2000/// TypeOfType (GCC extension). 2001class TypeOfType : public Type { 2002 QualType TOType; 2003 TypeOfType(QualType T, QualType can) 2004 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 2005 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2006 } 2007 friend class ASTContext; // ASTContext creates these. 2008public: 2009 QualType getUnderlyingType() const { return TOType; } 2010 2011 /// \brief Remove a single level of sugar. 2012 QualType desugar() const { return getUnderlyingType(); } 2013 2014 /// \brief Returns whether this type directly provides sugar. 2015 bool isSugared() const { return true; } 2016 2017 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2018 static bool classof(const TypeOfType *) { return true; } 2019}; 2020 2021/// DecltypeType (C++0x) 2022class DecltypeType : public Type { 2023 Expr *E; 2024 2025 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2026 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2027 // from it. 2028 QualType UnderlyingType; 2029 2030protected: 2031 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2032 friend class ASTContext; // ASTContext creates these. 2033public: 2034 Expr *getUnderlyingExpr() const { return E; } 2035 QualType getUnderlyingType() const { return UnderlyingType; } 2036 2037 /// \brief Remove a single level of sugar. 2038 QualType desugar() const { return getUnderlyingType(); } 2039 2040 /// \brief Returns whether this type directly provides sugar. 2041 bool isSugared() const { return !isDependentType(); } 2042 2043 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2044 static bool classof(const DecltypeType *) { return true; } 2045}; 2046 2047/// Subclass of DecltypeType that is used for canonical, dependent 2048/// C++0x decltype types. 2049class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2050 ASTContext &Context; 2051 2052public: 2053 DependentDecltypeType(ASTContext &Context, Expr *E); 2054 2055 bool isSugared() const { return false; } 2056 QualType desugar() const { return QualType(this, 0); } 2057 2058 void Profile(llvm::FoldingSetNodeID &ID) { 2059 Profile(ID, Context, getUnderlyingExpr()); 2060 } 2061 2062 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2063 Expr *E); 2064}; 2065 2066class TagType : public Type { 2067 /// Stores the TagDecl associated with this type. The decl will 2068 /// point to the TagDecl that actually defines the entity (or is a 2069 /// definition in progress), if there is such a definition. The 2070 /// single-bit value will be non-zero when this tag is in the 2071 /// process of being defined. 2072 mutable llvm::PointerIntPair<TagDecl *, 1> decl; 2073 friend class ASTContext; 2074 friend class TagDecl; 2075 2076protected: 2077 TagType(TypeClass TC, TagDecl *D, QualType can); 2078 2079public: 2080 TagDecl *getDecl() const { return decl.getPointer(); } 2081 2082 /// @brief Determines whether this type is in the process of being 2083 /// defined. 2084 bool isBeingDefined() const { return decl.getInt(); } 2085 void setBeingDefined(bool Def) const { decl.setInt(Def? 1 : 0); } 2086 2087 virtual Linkage getLinkage() const; 2088 2089 static bool classof(const Type *T) { 2090 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2091 } 2092 static bool classof(const TagType *) { return true; } 2093 static bool classof(const RecordType *) { return true; } 2094 static bool classof(const EnumType *) { return true; } 2095}; 2096 2097/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2098/// to detect TagType objects of structs/unions/classes. 2099class RecordType : public TagType { 2100protected: 2101 explicit RecordType(RecordDecl *D) 2102 : TagType(Record, reinterpret_cast<TagDecl*>(D), QualType()) { } 2103 explicit RecordType(TypeClass TC, RecordDecl *D) 2104 : TagType(TC, reinterpret_cast<TagDecl*>(D), QualType()) { } 2105 friend class ASTContext; // ASTContext creates these. 2106public: 2107 2108 RecordDecl *getDecl() const { 2109 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2110 } 2111 2112 // FIXME: This predicate is a helper to QualType/Type. It needs to 2113 // recursively check all fields for const-ness. If any field is declared 2114 // const, it needs to return false. 2115 bool hasConstFields() const { return false; } 2116 2117 // FIXME: RecordType needs to check when it is created that all fields are in 2118 // the same address space, and return that. 2119 unsigned getAddressSpace() const { return 0; } 2120 2121 bool isSugared() const { return false; } 2122 QualType desugar() const { return QualType(this, 0); } 2123 2124 static bool classof(const TagType *T); 2125 static bool classof(const Type *T) { 2126 return isa<TagType>(T) && classof(cast<TagType>(T)); 2127 } 2128 static bool classof(const RecordType *) { return true; } 2129}; 2130 2131/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2132/// to detect TagType objects of enums. 2133class EnumType : public TagType { 2134 explicit EnumType(EnumDecl *D) 2135 : TagType(Enum, reinterpret_cast<TagDecl*>(D), QualType()) { } 2136 friend class ASTContext; // ASTContext creates these. 2137public: 2138 2139 EnumDecl *getDecl() const { 2140 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2141 } 2142 2143 bool isSugared() const { return false; } 2144 QualType desugar() const { return QualType(this, 0); } 2145 2146 static bool classof(const TagType *T); 2147 static bool classof(const Type *T) { 2148 return isa<TagType>(T) && classof(cast<TagType>(T)); 2149 } 2150 static bool classof(const EnumType *) { return true; } 2151}; 2152 2153/// ElaboratedType - A non-canonical type used to represents uses of 2154/// elaborated type specifiers in C++. For example: 2155/// 2156/// void foo(union MyUnion); 2157/// ^^^^^^^^^^^^^ 2158/// 2159/// At the moment, for efficiency we do not create elaborated types in 2160/// C, since outside of typedefs all references to structs would 2161/// necessarily be elaborated. 2162class ElaboratedType : public Type, public llvm::FoldingSetNode { 2163public: 2164 enum TagKind { 2165 TK_struct, 2166 TK_union, 2167 TK_class, 2168 TK_enum 2169 }; 2170 2171private: 2172 /// The tag that was used in this elaborated type specifier. 2173 TagKind Tag; 2174 2175 /// The underlying type. 2176 QualType UnderlyingType; 2177 2178 explicit ElaboratedType(QualType Ty, TagKind Tag, QualType Canon) 2179 : Type(Elaborated, Canon, Canon->isDependentType()), 2180 Tag(Tag), UnderlyingType(Ty) { } 2181 friend class ASTContext; // ASTContext creates these. 2182 2183public: 2184 TagKind getTagKind() const { return Tag; } 2185 QualType getUnderlyingType() const { return UnderlyingType; } 2186 2187 /// \brief Remove a single level of sugar. 2188 QualType desugar() const { return getUnderlyingType(); } 2189 2190 /// \brief Returns whether this type directly provides sugar. 2191 bool isSugared() const { return true; } 2192 2193 static const char *getNameForTagKind(TagKind Kind) { 2194 switch (Kind) { 2195 default: assert(0 && "Unknown TagKind!"); 2196 case TK_struct: return "struct"; 2197 case TK_union: return "union"; 2198 case TK_class: return "class"; 2199 case TK_enum: return "enum"; 2200 } 2201 } 2202 2203 void Profile(llvm::FoldingSetNodeID &ID) { 2204 Profile(ID, getUnderlyingType(), getTagKind()); 2205 } 2206 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, TagKind Tag) { 2207 ID.AddPointer(T.getAsOpaquePtr()); 2208 ID.AddInteger(Tag); 2209 } 2210 2211 static bool classof(const ElaboratedType*) { return true; } 2212 static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } 2213}; 2214 2215class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2216 unsigned Depth : 15; 2217 unsigned Index : 16; 2218 unsigned ParameterPack : 1; 2219 IdentifierInfo *Name; 2220 2221 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2222 QualType Canon) 2223 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2224 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2225 2226 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2227 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 2228 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2229 2230 friend class ASTContext; // ASTContext creates these 2231 2232public: 2233 unsigned getDepth() const { return Depth; } 2234 unsigned getIndex() const { return Index; } 2235 bool isParameterPack() const { return ParameterPack; } 2236 IdentifierInfo *getName() const { return Name; } 2237 2238 bool isSugared() const { return false; } 2239 QualType desugar() const { return QualType(this, 0); } 2240 2241 void Profile(llvm::FoldingSetNodeID &ID) { 2242 Profile(ID, Depth, Index, ParameterPack, Name); 2243 } 2244 2245 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2246 unsigned Index, bool ParameterPack, 2247 IdentifierInfo *Name) { 2248 ID.AddInteger(Depth); 2249 ID.AddInteger(Index); 2250 ID.AddBoolean(ParameterPack); 2251 ID.AddPointer(Name); 2252 } 2253 2254 static bool classof(const Type *T) { 2255 return T->getTypeClass() == TemplateTypeParm; 2256 } 2257 static bool classof(const TemplateTypeParmType *T) { return true; } 2258}; 2259 2260/// \brief Represents the result of substituting a type for a template 2261/// type parameter. 2262/// 2263/// Within an instantiated template, all template type parameters have 2264/// been replaced with these. They are used solely to record that a 2265/// type was originally written as a template type parameter; 2266/// therefore they are never canonical. 2267class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2268 // The original type parameter. 2269 const TemplateTypeParmType *Replaced; 2270 2271 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2272 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType()), 2273 Replaced(Param) { } 2274 2275 friend class ASTContext; 2276 2277public: 2278 IdentifierInfo *getName() const { return Replaced->getName(); } 2279 2280 /// Gets the template parameter that was substituted for. 2281 const TemplateTypeParmType *getReplacedParameter() const { 2282 return Replaced; 2283 } 2284 2285 /// Gets the type that was substituted for the template 2286 /// parameter. 2287 QualType getReplacementType() const { 2288 return getCanonicalTypeInternal(); 2289 } 2290 2291 bool isSugared() const { return true; } 2292 QualType desugar() const { return getReplacementType(); } 2293 2294 void Profile(llvm::FoldingSetNodeID &ID) { 2295 Profile(ID, getReplacedParameter(), getReplacementType()); 2296 } 2297 static void Profile(llvm::FoldingSetNodeID &ID, 2298 const TemplateTypeParmType *Replaced, 2299 QualType Replacement) { 2300 ID.AddPointer(Replaced); 2301 ID.AddPointer(Replacement.getAsOpaquePtr()); 2302 } 2303 2304 static bool classof(const Type *T) { 2305 return T->getTypeClass() == SubstTemplateTypeParm; 2306 } 2307 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2308}; 2309 2310/// \brief Represents the type of a template specialization as written 2311/// in the source code. 2312/// 2313/// Template specialization types represent the syntactic form of a 2314/// template-id that refers to a type, e.g., @c vector<int>. Some 2315/// template specialization types are syntactic sugar, whose canonical 2316/// type will point to some other type node that represents the 2317/// instantiation or class template specialization. For example, a 2318/// class template specialization type of @c vector<int> will refer to 2319/// a tag type for the instantiation 2320/// @c std::vector<int, std::allocator<int>>. 2321/// 2322/// Other template specialization types, for which the template name 2323/// is dependent, may be canonical types. These types are always 2324/// dependent. 2325class TemplateSpecializationType 2326 : public Type, public llvm::FoldingSetNode { 2327 2328 // FIXME: Currently needed for profiling expressions; can we avoid this? 2329 ASTContext &Context; 2330 2331 /// \brief The name of the template being specialized. 2332 TemplateName Template; 2333 2334 /// \brief - The number of template arguments named in this class 2335 /// template specialization. 2336 unsigned NumArgs; 2337 2338 TemplateSpecializationType(ASTContext &Context, 2339 TemplateName T, 2340 const TemplateArgument *Args, 2341 unsigned NumArgs, QualType Canon); 2342 2343 virtual void Destroy(ASTContext& C); 2344 2345 friend class ASTContext; // ASTContext creates these 2346 2347public: 2348 /// \brief Determine whether any of the given template arguments are 2349 /// dependent. 2350 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2351 unsigned NumArgs); 2352 2353 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2354 unsigned NumArgs); 2355 2356 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2357 2358 /// \brief Print a template argument list, including the '<' and '>' 2359 /// enclosing the template arguments. 2360 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2361 unsigned NumArgs, 2362 const PrintingPolicy &Policy); 2363 2364 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2365 unsigned NumArgs, 2366 const PrintingPolicy &Policy); 2367 2368 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2369 const PrintingPolicy &Policy); 2370 2371 typedef const TemplateArgument * iterator; 2372 2373 iterator begin() const { return getArgs(); } 2374 iterator end() const; 2375 2376 /// \brief Retrieve the name of the template that we are specializing. 2377 TemplateName getTemplateName() const { return Template; } 2378 2379 /// \brief Retrieve the template arguments. 2380 const TemplateArgument *getArgs() const { 2381 return reinterpret_cast<const TemplateArgument *>(this + 1); 2382 } 2383 2384 /// \brief Retrieve the number of template arguments. 2385 unsigned getNumArgs() const { return NumArgs; } 2386 2387 /// \brief Retrieve a specific template argument as a type. 2388 /// \precondition @c isArgType(Arg) 2389 const TemplateArgument &getArg(unsigned Idx) const; 2390 2391 bool isSugared() const { return !isDependentType(); } 2392 QualType desugar() const { return getCanonicalTypeInternal(); } 2393 2394 void Profile(llvm::FoldingSetNodeID &ID) { 2395 Profile(ID, Template, getArgs(), NumArgs, Context); 2396 } 2397 2398 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2399 const TemplateArgument *Args, unsigned NumArgs, 2400 ASTContext &Context); 2401 2402 static bool classof(const Type *T) { 2403 return T->getTypeClass() == TemplateSpecialization; 2404 } 2405 static bool classof(const TemplateSpecializationType *T) { return true; } 2406}; 2407 2408/// \brief Represents a type that was referred to via a qualified 2409/// name, e.g., N::M::type. 2410/// 2411/// This type is used to keep track of a type name as written in the 2412/// source code, including any nested-name-specifiers. The type itself 2413/// is always "sugar", used to express what was written in the source 2414/// code but containing no additional semantic information. 2415class QualifiedNameType : public Type, public llvm::FoldingSetNode { 2416 /// \brief The nested name specifier containing the qualifier. 2417 NestedNameSpecifier *NNS; 2418 2419 /// \brief The type that this qualified name refers to. 2420 QualType NamedType; 2421 2422 QualifiedNameType(NestedNameSpecifier *NNS, QualType NamedType, 2423 QualType CanonType) 2424 : Type(QualifiedName, CanonType, NamedType->isDependentType()), 2425 NNS(NNS), NamedType(NamedType) { } 2426 2427 friend class ASTContext; // ASTContext creates these 2428 2429public: 2430 /// \brief Retrieve the qualification on this type. 2431 NestedNameSpecifier *getQualifier() const { return NNS; } 2432 2433 /// \brief Retrieve the type named by the qualified-id. 2434 QualType getNamedType() const { return NamedType; } 2435 2436 /// \brief Remove a single level of sugar. 2437 QualType desugar() const { return getNamedType(); } 2438 2439 /// \brief Returns whether this type directly provides sugar. 2440 bool isSugared() const { return true; } 2441 2442 void Profile(llvm::FoldingSetNodeID &ID) { 2443 Profile(ID, NNS, NamedType); 2444 } 2445 2446 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2447 QualType NamedType) { 2448 ID.AddPointer(NNS); 2449 NamedType.Profile(ID); 2450 } 2451 2452 static bool classof(const Type *T) { 2453 return T->getTypeClass() == QualifiedName; 2454 } 2455 static bool classof(const QualifiedNameType *T) { return true; } 2456}; 2457 2458/// \brief Represents a 'typename' specifier that names a type within 2459/// a dependent type, e.g., "typename T::type". 2460/// 2461/// TypenameType has a very similar structure to QualifiedNameType, 2462/// which also involves a nested-name-specifier following by a type, 2463/// and (FIXME!) both can even be prefixed by the 'typename' 2464/// keyword. However, the two types serve very different roles: 2465/// QualifiedNameType is a non-semantic type that serves only as sugar 2466/// to show how a particular type was written in the source 2467/// code. TypenameType, on the other hand, only occurs when the 2468/// nested-name-specifier is dependent, such that we cannot resolve 2469/// the actual type until after instantiation. 2470class TypenameType : public Type, public llvm::FoldingSetNode { 2471 /// \brief The nested name specifier containing the qualifier. 2472 NestedNameSpecifier *NNS; 2473 2474 typedef llvm::PointerUnion<const IdentifierInfo *, 2475 const TemplateSpecializationType *> NameType; 2476 2477 /// \brief The type that this typename specifier refers to. 2478 NameType Name; 2479 2480 TypenameType(NestedNameSpecifier *NNS, const IdentifierInfo *Name, 2481 QualType CanonType) 2482 : Type(Typename, CanonType, true), NNS(NNS), Name(Name) { 2483 assert(NNS->isDependent() && 2484 "TypenameType requires a dependent nested-name-specifier"); 2485 } 2486 2487 TypenameType(NestedNameSpecifier *NNS, const TemplateSpecializationType *Ty, 2488 QualType CanonType) 2489 : Type(Typename, CanonType, true), NNS(NNS), Name(Ty) { 2490 assert(NNS->isDependent() && 2491 "TypenameType requires a dependent nested-name-specifier"); 2492 } 2493 2494 friend class ASTContext; // ASTContext creates these 2495 2496public: 2497 /// \brief Retrieve the qualification on this type. 2498 NestedNameSpecifier *getQualifier() const { return NNS; } 2499 2500 /// \brief Retrieve the type named by the typename specifier as an 2501 /// identifier. 2502 /// 2503 /// This routine will return a non-NULL identifier pointer when the 2504 /// form of the original typename was terminated by an identifier, 2505 /// e.g., "typename T::type". 2506 const IdentifierInfo *getIdentifier() const { 2507 return Name.dyn_cast<const IdentifierInfo *>(); 2508 } 2509 2510 /// \brief Retrieve the type named by the typename specifier as a 2511 /// type specialization. 2512 const TemplateSpecializationType *getTemplateId() const { 2513 return Name.dyn_cast<const TemplateSpecializationType *>(); 2514 } 2515 2516 bool isSugared() const { return false; } 2517 QualType desugar() const { return QualType(this, 0); } 2518 2519 void Profile(llvm::FoldingSetNodeID &ID) { 2520 Profile(ID, NNS, Name); 2521 } 2522 2523 static void Profile(llvm::FoldingSetNodeID &ID, NestedNameSpecifier *NNS, 2524 NameType Name) { 2525 ID.AddPointer(NNS); 2526 ID.AddPointer(Name.getOpaqueValue()); 2527 } 2528 2529 static bool classof(const Type *T) { 2530 return T->getTypeClass() == Typename; 2531 } 2532 static bool classof(const TypenameType *T) { return true; } 2533}; 2534 2535/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 2536/// object oriented design. They basically correspond to C++ classes. There 2537/// are two kinds of interface types, normal interfaces like "NSString" and 2538/// qualified interfaces, which are qualified with a protocol list like 2539/// "NSString<NSCopyable, NSAmazing>". 2540class ObjCInterfaceType : public Type, public llvm::FoldingSetNode { 2541 ObjCInterfaceDecl *Decl; 2542 2543 // List of protocols for this protocol conforming object type 2544 // List is sorted on protocol name. No protocol is enterred more than once. 2545 ObjCProtocolDecl **Protocols; 2546 unsigned NumProtocols; 2547 2548 ObjCInterfaceType(ASTContext &Ctx, QualType Canonical, ObjCInterfaceDecl *D, 2549 ObjCProtocolDecl **Protos, unsigned NumP); 2550 friend class ASTContext; // ASTContext creates these. 2551public: 2552 void Destroy(ASTContext& C); 2553 2554 ObjCInterfaceDecl *getDecl() const { return Decl; } 2555 2556 /// getNumProtocols - Return the number of qualifying protocols in this 2557 /// interface type, or 0 if there are none. 2558 unsigned getNumProtocols() const { return NumProtocols; } 2559 2560 /// qual_iterator and friends: this provides access to the (potentially empty) 2561 /// list of protocols qualifying this interface. 2562 typedef ObjCProtocolDecl* const * qual_iterator; 2563 qual_iterator qual_begin() const { 2564 return Protocols; 2565 } 2566 qual_iterator qual_end() const { 2567 return Protocols ? Protocols + NumProtocols : 0; 2568 } 2569 bool qual_empty() const { return NumProtocols == 0; } 2570 2571 bool isSugared() const { return false; } 2572 QualType desugar() const { return QualType(this, 0); } 2573 2574 void Profile(llvm::FoldingSetNodeID &ID); 2575 static void Profile(llvm::FoldingSetNodeID &ID, 2576 const ObjCInterfaceDecl *Decl, 2577 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2578 2579 virtual Linkage getLinkage() const; 2580 2581 static bool classof(const Type *T) { 2582 return T->getTypeClass() == ObjCInterface; 2583 } 2584 static bool classof(const ObjCInterfaceType *) { return true; } 2585}; 2586 2587/// ObjCObjectPointerType - Used to represent 'id', 'Interface *', 'id <p>', 2588/// and 'Interface <p> *'. 2589/// 2590/// Duplicate protocols are removed and protocol list is canonicalized to be in 2591/// alphabetical order. 2592class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 2593 QualType PointeeType; // A builtin or interface type. 2594 2595 // List of protocols for this protocol conforming object type 2596 // List is sorted on protocol name. No protocol is entered more than once. 2597 ObjCProtocolDecl **Protocols; 2598 unsigned NumProtocols; 2599 2600 ObjCObjectPointerType(ASTContext &Ctx, QualType Canonical, QualType T, 2601 ObjCProtocolDecl **Protos, unsigned NumP); 2602 friend class ASTContext; // ASTContext creates these. 2603 2604public: 2605 void Destroy(ASTContext& C); 2606 2607 // Get the pointee type. Pointee will either be: 2608 // - a built-in type (for 'id' and 'Class'). 2609 // - an interface type (for user-defined types). 2610 // - a TypedefType whose canonical type is an interface (as in 'T' below). 2611 // For example: typedef NSObject T; T *var; 2612 QualType getPointeeType() const { return PointeeType; } 2613 2614 const ObjCInterfaceType *getInterfaceType() const { 2615 return PointeeType->getAs<ObjCInterfaceType>(); 2616 } 2617 /// getInterfaceDecl - returns an interface decl for user-defined types. 2618 ObjCInterfaceDecl *getInterfaceDecl() const { 2619 return getInterfaceType() ? getInterfaceType()->getDecl() : 0; 2620 } 2621 /// isObjCIdType - true for "id". 2622 bool isObjCIdType() const { 2623 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2624 !NumProtocols; 2625 } 2626 /// isObjCClassType - true for "Class". 2627 bool isObjCClassType() const { 2628 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2629 !NumProtocols; 2630 } 2631 2632 /// isObjCQualifiedIdType - true for "id <p>". 2633 bool isObjCQualifiedIdType() const { 2634 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCId) && 2635 NumProtocols; 2636 } 2637 /// isObjCQualifiedClassType - true for "Class <p>". 2638 bool isObjCQualifiedClassType() const { 2639 return getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCClass) && 2640 NumProtocols; 2641 } 2642 /// qual_iterator and friends: this provides access to the (potentially empty) 2643 /// list of protocols qualifying this interface. 2644 typedef ObjCProtocolDecl* const * qual_iterator; 2645 2646 qual_iterator qual_begin() const { 2647 return Protocols; 2648 } 2649 qual_iterator qual_end() const { 2650 return Protocols ? Protocols + NumProtocols : NULL; 2651 } 2652 bool qual_empty() const { return NumProtocols == 0; } 2653 2654 /// getNumProtocols - Return the number of qualifying protocols in this 2655 /// interface type, or 0 if there are none. 2656 unsigned getNumProtocols() const { return NumProtocols; } 2657 2658 bool isSugared() const { return false; } 2659 QualType desugar() const { return QualType(this, 0); } 2660 2661 virtual Linkage getLinkage() const; 2662 2663 void Profile(llvm::FoldingSetNodeID &ID); 2664 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, 2665 ObjCProtocolDecl **protocols, unsigned NumProtocols); 2666 static bool classof(const Type *T) { 2667 return T->getTypeClass() == ObjCObjectPointer; 2668 } 2669 static bool classof(const ObjCObjectPointerType *) { return true; } 2670}; 2671 2672/// A qualifier set is used to build a set of qualifiers. 2673class QualifierCollector : public Qualifiers { 2674 ASTContext *Context; 2675 2676public: 2677 QualifierCollector(Qualifiers Qs = Qualifiers()) 2678 : Qualifiers(Qs), Context(0) {} 2679 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 2680 : Qualifiers(Qs), Context(&Context) {} 2681 2682 void setContext(ASTContext &C) { Context = &C; } 2683 2684 /// Collect any qualifiers on the given type and return an 2685 /// unqualified type. 2686 const Type *strip(QualType QT) { 2687 addFastQualifiers(QT.getLocalFastQualifiers()); 2688 if (QT.hasLocalNonFastQualifiers()) { 2689 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 2690 Context = &EQ->getContext(); 2691 addQualifiers(EQ->getQualifiers()); 2692 return EQ->getBaseType(); 2693 } 2694 return QT.getTypePtrUnsafe(); 2695 } 2696 2697 /// Apply the collected qualifiers to the given type. 2698 QualType apply(QualType QT) const; 2699 2700 /// Apply the collected qualifiers to the given type. 2701 QualType apply(const Type* T) const; 2702 2703}; 2704 2705 2706// Inline function definitions. 2707 2708inline bool QualType::isCanonical() const { 2709 const Type *T = getTypePtr(); 2710 if (hasLocalQualifiers()) 2711 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 2712 return T->isCanonicalUnqualified(); 2713} 2714 2715inline bool QualType::isCanonicalAsParam() const { 2716 if (hasLocalQualifiers()) return false; 2717 const Type *T = getTypePtr(); 2718 return T->isCanonicalUnqualified() && 2719 !isa<FunctionType>(T) && !isa<ArrayType>(T); 2720} 2721 2722inline bool QualType::isConstQualified() const { 2723 return isLocalConstQualified() || 2724 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 2725} 2726 2727inline bool QualType::isRestrictQualified() const { 2728 return isLocalRestrictQualified() || 2729 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 2730} 2731 2732 2733inline bool QualType::isVolatileQualified() const { 2734 return isLocalVolatileQualified() || 2735 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 2736} 2737 2738inline bool QualType::hasQualifiers() const { 2739 return hasLocalQualifiers() || 2740 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 2741} 2742 2743inline Qualifiers QualType::getQualifiers() const { 2744 Qualifiers Quals = getLocalQualifiers(); 2745 Quals.addQualifiers( 2746 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 2747 return Quals; 2748} 2749 2750inline unsigned QualType::getCVRQualifiers() const { 2751 return getLocalCVRQualifiers() | 2752 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 2753} 2754 2755/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 2756/// type, returns them. Otherwise, if this is an array type, recurses 2757/// on the element type until some qualifiers have been found or a non-array 2758/// type reached. 2759inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 2760 if (unsigned Quals = getCVRQualifiers()) 2761 return Quals; 2762 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2763 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2764 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 2765 return 0; 2766} 2767 2768inline void QualType::removeConst() { 2769 removeFastQualifiers(Qualifiers::Const); 2770} 2771 2772inline void QualType::removeRestrict() { 2773 removeFastQualifiers(Qualifiers::Restrict); 2774} 2775 2776inline void QualType::removeVolatile() { 2777 QualifierCollector Qc; 2778 const Type *Ty = Qc.strip(*this); 2779 if (Qc.hasVolatile()) { 2780 Qc.removeVolatile(); 2781 *this = Qc.apply(Ty); 2782 } 2783} 2784 2785inline void QualType::removeCVRQualifiers(unsigned Mask) { 2786 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 2787 2788 // Fast path: we don't need to touch the slow qualifiers. 2789 if (!(Mask & ~Qualifiers::FastMask)) { 2790 removeFastQualifiers(Mask); 2791 return; 2792 } 2793 2794 QualifierCollector Qc; 2795 const Type *Ty = Qc.strip(*this); 2796 Qc.removeCVRQualifiers(Mask); 2797 *this = Qc.apply(Ty); 2798} 2799 2800/// getAddressSpace - Return the address space of this type. 2801inline unsigned QualType::getAddressSpace() const { 2802 if (hasLocalNonFastQualifiers()) { 2803 const ExtQuals *EQ = getExtQualsUnsafe(); 2804 if (EQ->hasAddressSpace()) 2805 return EQ->getAddressSpace(); 2806 } 2807 2808 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2809 if (CT.hasLocalNonFastQualifiers()) { 2810 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2811 if (EQ->hasAddressSpace()) 2812 return EQ->getAddressSpace(); 2813 } 2814 2815 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2816 return AT->getElementType().getAddressSpace(); 2817 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 2818 return RT->getAddressSpace(); 2819 return 0; 2820} 2821 2822/// getObjCGCAttr - Return the gc attribute of this type. 2823inline Qualifiers::GC QualType::getObjCGCAttr() const { 2824 if (hasLocalNonFastQualifiers()) { 2825 const ExtQuals *EQ = getExtQualsUnsafe(); 2826 if (EQ->hasObjCGCAttr()) 2827 return EQ->getObjCGCAttr(); 2828 } 2829 2830 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2831 if (CT.hasLocalNonFastQualifiers()) { 2832 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 2833 if (EQ->hasObjCGCAttr()) 2834 return EQ->getObjCGCAttr(); 2835 } 2836 2837 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 2838 return AT->getElementType().getObjCGCAttr(); 2839 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 2840 return PT->getPointeeType().getObjCGCAttr(); 2841 // We most look at all pointer types, not just pointer to interface types. 2842 if (const PointerType *PT = CT->getAs<PointerType>()) 2843 return PT->getPointeeType().getObjCGCAttr(); 2844 return Qualifiers::GCNone; 2845} 2846 2847 /// getNoReturnAttr - Returns true if the type has the noreturn attribute, 2848 /// false otherwise. 2849inline bool QualType::getNoReturnAttr() const { 2850 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 2851 if (const PointerType *PT = getTypePtr()->getAs<PointerType>()) { 2852 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 2853 return FT->getNoReturnAttr(); 2854 } else if (const FunctionType *FT = getTypePtr()->getAs<FunctionType>()) 2855 return FT->getNoReturnAttr(); 2856 2857 return false; 2858} 2859 2860/// getCallConv - Returns the calling convention of the type if the type 2861/// is a function type, CC_Default otherwise. 2862inline CallingConv QualType::getCallConv() const { 2863 if (const PointerType *PT = getTypePtr()->getAs<PointerType>()) 2864 return PT->getPointeeType().getCallConv(); 2865 else if (const ReferenceType *RT = getTypePtr()->getAs<ReferenceType>()) 2866 return RT->getPointeeType().getCallConv(); 2867 else if (const MemberPointerType *MPT = 2868 getTypePtr()->getAs<MemberPointerType>()) 2869 return MPT->getPointeeType().getCallConv(); 2870 else if (const BlockPointerType *BPT = 2871 getTypePtr()->getAs<BlockPointerType>()) { 2872 if (const FunctionType *FT = BPT->getPointeeType()->getAs<FunctionType>()) 2873 return FT->getCallConv(); 2874 } else if (const FunctionType *FT = getTypePtr()->getAs<FunctionType>()) 2875 return FT->getCallConv(); 2876 2877 return CC_Default; 2878} 2879 2880/// isMoreQualifiedThan - Determine whether this type is more 2881/// qualified than the Other type. For example, "const volatile int" 2882/// is more qualified than "const int", "volatile int", and 2883/// "int". However, it is not more qualified than "const volatile 2884/// int". 2885inline bool QualType::isMoreQualifiedThan(QualType Other) const { 2886 // FIXME: work on arbitrary qualifiers 2887 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 2888 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 2889 if (getAddressSpace() != Other.getAddressSpace()) 2890 return false; 2891 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 2892} 2893 2894/// isAtLeastAsQualifiedAs - Determine whether this type is at last 2895/// as qualified as the Other type. For example, "const volatile 2896/// int" is at least as qualified as "const int", "volatile int", 2897/// "int", and "const volatile int". 2898inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 2899 // FIXME: work on arbitrary qualifiers 2900 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 2901 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 2902 if (getAddressSpace() != Other.getAddressSpace()) 2903 return false; 2904 return (MyQuals | OtherQuals) == MyQuals; 2905} 2906 2907/// getNonReferenceType - If Type is a reference type (e.g., const 2908/// int&), returns the type that the reference refers to ("const 2909/// int"). Otherwise, returns the type itself. This routine is used 2910/// throughout Sema to implement C++ 5p6: 2911/// 2912/// If an expression initially has the type "reference to T" (8.3.2, 2913/// 8.5.3), the type is adjusted to "T" prior to any further 2914/// analysis, the expression designates the object or function 2915/// denoted by the reference, and the expression is an lvalue. 2916inline QualType QualType::getNonReferenceType() const { 2917 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 2918 return RefType->getPointeeType(); 2919 else 2920 return *this; 2921} 2922 2923inline const ObjCInterfaceType *Type::getAsPointerToObjCInterfaceType() const { 2924 if (const PointerType *PT = getAs<PointerType>()) 2925 return PT->getPointeeType()->getAs<ObjCInterfaceType>(); 2926 return 0; 2927} 2928 2929inline bool Type::isFunctionType() const { 2930 return isa<FunctionType>(CanonicalType); 2931} 2932inline bool Type::isPointerType() const { 2933 return isa<PointerType>(CanonicalType); 2934} 2935inline bool Type::isAnyPointerType() const { 2936 return isPointerType() || isObjCObjectPointerType(); 2937} 2938inline bool Type::isBlockPointerType() const { 2939 return isa<BlockPointerType>(CanonicalType); 2940} 2941inline bool Type::isReferenceType() const { 2942 return isa<ReferenceType>(CanonicalType); 2943} 2944inline bool Type::isLValueReferenceType() const { 2945 return isa<LValueReferenceType>(CanonicalType); 2946} 2947inline bool Type::isRValueReferenceType() const { 2948 return isa<RValueReferenceType>(CanonicalType); 2949} 2950inline bool Type::isFunctionPointerType() const { 2951 if (const PointerType* T = getAs<PointerType>()) 2952 return T->getPointeeType()->isFunctionType(); 2953 else 2954 return false; 2955} 2956inline bool Type::isMemberPointerType() const { 2957 return isa<MemberPointerType>(CanonicalType); 2958} 2959inline bool Type::isMemberFunctionPointerType() const { 2960 if (const MemberPointerType* T = getAs<MemberPointerType>()) 2961 return T->getPointeeType()->isFunctionType(); 2962 else 2963 return false; 2964} 2965inline bool Type::isArrayType() const { 2966 return isa<ArrayType>(CanonicalType); 2967} 2968inline bool Type::isConstantArrayType() const { 2969 return isa<ConstantArrayType>(CanonicalType); 2970} 2971inline bool Type::isIncompleteArrayType() const { 2972 return isa<IncompleteArrayType>(CanonicalType); 2973} 2974inline bool Type::isVariableArrayType() const { 2975 return isa<VariableArrayType>(CanonicalType); 2976} 2977inline bool Type::isDependentSizedArrayType() const { 2978 return isa<DependentSizedArrayType>(CanonicalType); 2979} 2980inline bool Type::isRecordType() const { 2981 return isa<RecordType>(CanonicalType); 2982} 2983inline bool Type::isAnyComplexType() const { 2984 return isa<ComplexType>(CanonicalType); 2985} 2986inline bool Type::isVectorType() const { 2987 return isa<VectorType>(CanonicalType); 2988} 2989inline bool Type::isExtVectorType() const { 2990 return isa<ExtVectorType>(CanonicalType); 2991} 2992inline bool Type::isObjCObjectPointerType() const { 2993 return isa<ObjCObjectPointerType>(CanonicalType); 2994} 2995inline bool Type::isObjCInterfaceType() const { 2996 return isa<ObjCInterfaceType>(CanonicalType); 2997} 2998inline bool Type::isObjCQualifiedIdType() const { 2999 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3000 return OPT->isObjCQualifiedIdType(); 3001 return false; 3002} 3003inline bool Type::isObjCQualifiedClassType() const { 3004 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3005 return OPT->isObjCQualifiedClassType(); 3006 return false; 3007} 3008inline bool Type::isObjCIdType() const { 3009 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3010 return OPT->isObjCIdType(); 3011 return false; 3012} 3013inline bool Type::isObjCClassType() const { 3014 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3015 return OPT->isObjCClassType(); 3016 return false; 3017} 3018inline bool Type::isObjCSelType() const { 3019 if (const PointerType *OPT = getAs<PointerType>()) 3020 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3021 return false; 3022} 3023inline bool Type::isObjCBuiltinType() const { 3024 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3025} 3026inline bool Type::isTemplateTypeParmType() const { 3027 return isa<TemplateTypeParmType>(CanonicalType); 3028} 3029 3030inline bool Type::isSpecificBuiltinType(unsigned K) const { 3031 if (const BuiltinType *BT = getAs<BuiltinType>()) 3032 if (BT->getKind() == (BuiltinType::Kind) K) 3033 return true; 3034 return false; 3035} 3036 3037/// \brief Determines whether this is a type for which one can define 3038/// an overloaded operator. 3039inline bool Type::isOverloadableType() const { 3040 return isDependentType() || isRecordType() || isEnumeralType(); 3041} 3042 3043inline bool Type::hasPointerRepresentation() const { 3044 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3045 isObjCInterfaceType() || isObjCObjectPointerType() || 3046 isObjCQualifiedInterfaceType() || isNullPtrType()); 3047} 3048 3049inline bool Type::hasObjCPointerRepresentation() const { 3050 return (isObjCInterfaceType() || isObjCObjectPointerType() || 3051 isObjCQualifiedInterfaceType()); 3052} 3053 3054/// Insertion operator for diagnostics. This allows sending QualType's into a 3055/// diagnostic with <<. 3056inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3057 QualType T) { 3058 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3059 Diagnostic::ak_qualtype); 3060 return DB; 3061} 3062 3063// Helper class template that is used by Type::getAs to ensure that one does 3064// not try to look through a qualified type to get to an array type. 3065template<typename T, 3066 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3067 llvm::is_base_of<ArrayType, T>::value)> 3068struct ArrayType_cannot_be_used_with_getAs { }; 3069 3070template<typename T> 3071struct ArrayType_cannot_be_used_with_getAs<T, true>; 3072 3073/// Member-template getAs<specific type>'. 3074template <typename T> const T *Type::getAs() const { 3075 ArrayType_cannot_be_used_with_getAs<T> at; 3076 (void)at; 3077 3078 // If this is directly a T type, return it. 3079 if (const T *Ty = dyn_cast<T>(this)) 3080 return Ty; 3081 3082 // If the canonical form of this type isn't the right kind, reject it. 3083 if (!isa<T>(CanonicalType)) 3084 return 0; 3085 3086 // If this is a typedef for the type, strip the typedef off without 3087 // losing all typedef information. 3088 return cast<T>(getUnqualifiedDesugaredType()); 3089} 3090 3091} // end namespace clang 3092 3093#endif 3094