Type.h revision 2fd2f7e034165b23a762bf9221adaee5c0599786
18d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 28d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// 3c55524ad84d13014e8019491c2b17e5dcf13545aDmitry Shmidt// The LLVM Compiler Infrastructure 48d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// 5c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt// This file is distributed under the University of Illinois Open Source 6c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt// License. See LICENSE.TXT for details. 78d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// 88d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt//===----------------------------------------------------------------------===// 98d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// 108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// This file defines the Type interface and subclasses. 118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// 128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt//===----------------------------------------------------------------------===// 138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifndef LLVM_CLANG_AST_TYPE_H 158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define LLVM_CLANG_AST_TYPE_H 168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "clang/Basic/Diagnostic.h" 188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "clang/Basic/IdentifierTable.h" 198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "clang/Basic/Linkage.h" 208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "clang/Basic/PartialDiagnostic.h" 218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "clang/AST/NestedNameSpecifier.h" 228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "clang/AST/TemplateName.h" 238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "llvm/Support/Casting.h" 248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "llvm/Support/type_traits.h" 258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "llvm/ADT/APSInt.h" 268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "llvm/ADT/FoldingSet.h" 278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "llvm/ADT/PointerIntPair.h" 288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "llvm/ADT/PointerUnion.h" 298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtusing llvm::isa; 318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtusing llvm::cast; 328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtusing llvm::cast_or_null; 338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtusing llvm::dyn_cast; 348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtusing llvm::dyn_cast_or_null; 358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtnamespace clang { 368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt enum { 378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt TypeAlignmentInBits = 3, 388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt TypeAlignment = 1 << TypeAlignmentInBits 398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt }; 408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class Type; 418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class ExtQuals; 428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class QualType; 438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtnamespace llvm { 468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt template <typename T> 478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class PointerLikeTypeTraits; 488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt template<> 498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class PointerLikeTypeTraits< ::clang::Type*> { 508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt public: 518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt static inline ::clang::Type *getFromVoidPointer(void *P) { 538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return static_cast< ::clang::Type*>(P); 548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt }; 578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt template<> 588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class PointerLikeTypeTraits< ::clang::ExtQuals*> { 598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt public: 608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return static_cast< ::clang::ExtQuals*>(P); 638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt }; 668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt template <> 688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct isPodLike<clang::QualType> { static const bool value = true; }; 698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtnamespace clang { 728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class ASTContext; 738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class TypedefDecl; 748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class TemplateDecl; 758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class TemplateTypeParmDecl; 768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class NonTypeTemplateParmDecl; 778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class TemplateTemplateParmDecl; 788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class TagDecl; 798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class RecordDecl; 808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class CXXRecordDecl; 818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class EnumDecl; 828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class FieldDecl; 838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class ObjCInterfaceDecl; 848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class ObjCProtocolDecl; 858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class ObjCMethodDecl; 868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class UnresolvedUsingTypenameDecl; 878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class Expr; 888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class Stmt; 898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class SourceLocation; 908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class StmtIteratorBase; 918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class TemplateArgument; 928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class TemplateArgumentLoc; 938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class TemplateArgumentListInfo; 948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class Type; 958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt class ElaboratedType; 968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct PrintingPolicy; 978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt template <typename> class CanQual; 998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt typedef CanQual<Type> CanQualType; 1008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt // Provide forward declarations for all of the *Type classes 1028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define TYPE(Class, Base) class Class##Type; 1038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "clang/AST/TypeNodes.def" 1048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/// Qualifiers - The collection of all-type qualifiers we support. 1068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/// Clang supports five independent qualifiers: 1078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/// * C99: const, volatile, and restrict 1088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/// * Embedded C (TR18037): address spaces 1098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/// * Objective C: the GC attributes (none, weak, or strong) 1108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtclass Qualifiers { 1118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtpublic: 1128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 1138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt Const = 0x1, 1148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt Restrict = 0x2, 1158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt Volatile = 0x4, 1168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt CVRMask = Const | Volatile | Restrict 117c55524ad84d13014e8019491c2b17e5dcf13545aDmitry Shmidt }; 1188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt enum GC { 1208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt GCNone = 0, 1218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt Weak, 1228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt Strong 1238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt }; 124 125 enum { 126 /// The maximum supported address space number. 127 /// 24 bits should be enough for anyone. 128 MaxAddressSpace = 0xffffffu, 129 130 /// The width of the "fast" qualifier mask. 131 FastWidth = 2, 132 133 /// The fast qualifier mask. 134 FastMask = (1 << FastWidth) - 1 135 }; 136 137 Qualifiers() : Mask(0) {} 138 139 static Qualifiers fromFastMask(unsigned Mask) { 140 Qualifiers Qs; 141 Qs.addFastQualifiers(Mask); 142 return Qs; 143 } 144 145 static Qualifiers fromCVRMask(unsigned CVR) { 146 Qualifiers Qs; 147 Qs.addCVRQualifiers(CVR); 148 return Qs; 149 } 150 151 // Deserialize qualifiers from an opaque representation. 152 static Qualifiers fromOpaqueValue(unsigned opaque) { 153 Qualifiers Qs; 154 Qs.Mask = opaque; 155 return Qs; 156 } 157 158 // Serialize these qualifiers into an opaque representation. 159 unsigned getAsOpaqueValue() const { 160 return Mask; 161 } 162 163 bool hasConst() const { return Mask & Const; } 164 void setConst(bool flag) { 165 Mask = (Mask & ~Const) | (flag ? Const : 0); 166 } 167 void removeConst() { Mask &= ~Const; } 168 void addConst() { Mask |= Const; } 169 170 bool hasVolatile() const { return Mask & Volatile; } 171 void setVolatile(bool flag) { 172 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 173 } 174 void removeVolatile() { Mask &= ~Volatile; } 175 void addVolatile() { Mask |= Volatile; } 176 177 bool hasRestrict() const { return Mask & Restrict; } 178 void setRestrict(bool flag) { 179 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 180 } 181 void removeRestrict() { Mask &= ~Restrict; } 182 void addRestrict() { Mask |= Restrict; } 183 184 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 185 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 186 void setCVRQualifiers(unsigned mask) { 187 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 188 Mask = (Mask & ~CVRMask) | mask; 189 } 190 void removeCVRQualifiers(unsigned mask) { 191 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 192 Mask &= ~mask; 193 } 194 void removeCVRQualifiers() { 195 removeCVRQualifiers(CVRMask); 196 } 197 void addCVRQualifiers(unsigned mask) { 198 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 199 Mask |= mask; 200 } 201 202 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 203 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 204 void setObjCGCAttr(GC type) { 205 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 206 } 207 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 208 void addObjCGCAttr(GC type) { 209 assert(type); 210 setObjCGCAttr(type); 211 } 212 213 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 214 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 215 void setAddressSpace(unsigned space) { 216 assert(space <= MaxAddressSpace); 217 Mask = (Mask & ~AddressSpaceMask) 218 | (((uint32_t) space) << AddressSpaceShift); 219 } 220 void removeAddressSpace() { setAddressSpace(0); } 221 void addAddressSpace(unsigned space) { 222 assert(space); 223 setAddressSpace(space); 224 } 225 226 // Fast qualifiers are those that can be allocated directly 227 // on a QualType object. 228 bool hasFastQualifiers() const { return getFastQualifiers(); } 229 unsigned getFastQualifiers() const { return Mask & FastMask; } 230 void setFastQualifiers(unsigned mask) { 231 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 232 Mask = (Mask & ~FastMask) | mask; 233 } 234 void removeFastQualifiers(unsigned mask) { 235 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 236 Mask &= ~mask; 237 } 238 void removeFastQualifiers() { 239 removeFastQualifiers(FastMask); 240 } 241 void addFastQualifiers(unsigned mask) { 242 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 243 Mask |= mask; 244 } 245 246 /// hasNonFastQualifiers - Return true if the set contains any 247 /// qualifiers which require an ExtQuals node to be allocated. 248 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 249 Qualifiers getNonFastQualifiers() const { 250 Qualifiers Quals = *this; 251 Quals.setFastQualifiers(0); 252 return Quals; 253 } 254 255 /// hasQualifiers - Return true if the set contains any qualifiers. 256 bool hasQualifiers() const { return Mask; } 257 bool empty() const { return !Mask; } 258 259 /// \brief Add the qualifiers from the given set to this set. 260 void addQualifiers(Qualifiers Q) { 261 // If the other set doesn't have any non-boolean qualifiers, just 262 // bit-or it in. 263 if (!(Q.Mask & ~CVRMask)) 264 Mask |= Q.Mask; 265 else { 266 Mask |= (Q.Mask & CVRMask); 267 if (Q.hasAddressSpace()) 268 addAddressSpace(Q.getAddressSpace()); 269 if (Q.hasObjCGCAttr()) 270 addObjCGCAttr(Q.getObjCGCAttr()); 271 } 272 } 273 274 bool isSupersetOf(Qualifiers Other) const; 275 276 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 277 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 278 279 operator bool() const { return hasQualifiers(); } 280 281 Qualifiers &operator+=(Qualifiers R) { 282 addQualifiers(R); 283 return *this; 284 } 285 286 // Union two qualifier sets. If an enumerated qualifier appears 287 // in both sets, use the one from the right. 288 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 289 L += R; 290 return L; 291 } 292 293 std::string getAsString() const; 294 std::string getAsString(const PrintingPolicy &Policy) const { 295 std::string Buffer; 296 getAsStringInternal(Buffer, Policy); 297 return Buffer; 298 } 299 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 300 301 void Profile(llvm::FoldingSetNodeID &ID) const { 302 ID.AddInteger(Mask); 303 } 304 305private: 306 307 // bits: |0 1 2|3 .. 4|5 .. 31| 308 // |C R V|GCAttr|AddrSpace| 309 uint32_t Mask; 310 311 static const uint32_t GCAttrMask = 0x18; 312 static const uint32_t GCAttrShift = 3; 313 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 314 static const uint32_t AddressSpaceShift = 5; 315}; 316 317 318/// ExtQuals - We can encode up to three bits in the low bits of a 319/// type pointer, but there are many more type qualifiers that we want 320/// to be able to apply to an arbitrary type. Therefore we have this 321/// struct, intended to be heap-allocated and used by QualType to 322/// store qualifiers. 323/// 324/// The current design tags the 'const' and 'restrict' qualifiers in 325/// two low bits on the QualType pointer; a third bit records whether 326/// the pointer is an ExtQuals node. 'const' was chosen because it is 327/// orders of magnitude more common than the other two qualifiers, in 328/// both library and user code. It's relatively rare to see 329/// 'restrict' in user code, but many standard C headers are saturated 330/// with 'restrict' declarations, so that representing them efficiently 331/// is a critical goal of this representation. 332class ExtQuals : public llvm::FoldingSetNode { 333 // NOTE: changing the fast qualifiers should be straightforward as 334 // long as you don't make 'const' non-fast. 335 // 1. Qualifiers: 336 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 337 // Fast qualifiers must occupy the low-order bits. 338 // b) Update Qualifiers::FastWidth and FastMask. 339 // 2. QualType: 340 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 341 // b) Update remove{Volatile,Restrict}, defined near the end of 342 // this header. 343 // 3. ASTContext: 344 // a) Update get{Volatile,Restrict}Type. 345 346 /// Context - the context to which this set belongs. We save this 347 /// here so that QualifierCollector can use it to reapply extended 348 /// qualifiers to an arbitrary type without requiring a context to 349 /// be pushed through every single API dealing with qualifiers. 350 ASTContext& Context; 351 352 /// BaseType - the underlying type that this qualifies 353 const Type *BaseType; 354 355 /// Quals - the immutable set of qualifiers applied by this 356 /// node; always contains extended qualifiers. 357 Qualifiers Quals; 358 359public: 360 ExtQuals(ASTContext& Context, const Type *Base, Qualifiers Quals) 361 : Context(Context), BaseType(Base), Quals(Quals) 362 { 363 assert(Quals.hasNonFastQualifiers() 364 && "ExtQuals created with no fast qualifiers"); 365 assert(!Quals.hasFastQualifiers() 366 && "ExtQuals created with fast qualifiers"); 367 } 368 369 Qualifiers getQualifiers() const { return Quals; } 370 371 bool hasVolatile() const { return Quals.hasVolatile(); } 372 373 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 374 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 375 376 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 377 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 378 379 const Type *getBaseType() const { return BaseType; } 380 381 ASTContext &getContext() const { return Context; } 382 383public: 384 void Profile(llvm::FoldingSetNodeID &ID) const { 385 Profile(ID, getBaseType(), Quals); 386 } 387 static void Profile(llvm::FoldingSetNodeID &ID, 388 const Type *BaseType, 389 Qualifiers Quals) { 390 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 391 ID.AddPointer(BaseType); 392 Quals.Profile(ID); 393 } 394}; 395 396/// CallingConv - Specifies the calling convention that a function uses. 397enum CallingConv { 398 CC_Default, 399 CC_C, // __attribute__((cdecl)) 400 CC_X86StdCall, // __attribute__((stdcall)) 401 CC_X86FastCall, // __attribute__((fastcall)) 402 CC_X86ThisCall // __attribute__((thiscall)) 403}; 404 405 406/// QualType - For efficiency, we don't store CV-qualified types as nodes on 407/// their own: instead each reference to a type stores the qualifiers. This 408/// greatly reduces the number of nodes we need to allocate for types (for 409/// example we only need one for 'int', 'const int', 'volatile int', 410/// 'const volatile int', etc). 411/// 412/// As an added efficiency bonus, instead of making this a pair, we 413/// just store the two bits we care about in the low bits of the 414/// pointer. To handle the packing/unpacking, we make QualType be a 415/// simple wrapper class that acts like a smart pointer. A third bit 416/// indicates whether there are extended qualifiers present, in which 417/// case the pointer points to a special structure. 418class QualType { 419 // Thankfully, these are efficiently composable. 420 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 421 Qualifiers::FastWidth> Value; 422 423 const ExtQuals *getExtQualsUnsafe() const { 424 return Value.getPointer().get<const ExtQuals*>(); 425 } 426 427 const Type *getTypePtrUnsafe() const { 428 return Value.getPointer().get<const Type*>(); 429 } 430 431 QualType getUnqualifiedTypeSlow() const; 432 433 friend class QualifierCollector; 434public: 435 QualType() {} 436 437 QualType(const Type *Ptr, unsigned Quals) 438 : Value(Ptr, Quals) {} 439 QualType(const ExtQuals *Ptr, unsigned Quals) 440 : Value(Ptr, Quals) {} 441 442 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 443 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 444 445 /// Retrieves a pointer to the underlying (unqualified) type. 446 /// This should really return a const Type, but it's not worth 447 /// changing all the users right now. 448 Type *getTypePtr() const { 449 if (hasLocalNonFastQualifiers()) 450 return const_cast<Type*>(getExtQualsUnsafe()->getBaseType()); 451 return const_cast<Type*>(getTypePtrUnsafe()); 452 } 453 454 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 455 static QualType getFromOpaquePtr(void *Ptr) { 456 QualType T; 457 T.Value.setFromOpaqueValue(Ptr); 458 return T; 459 } 460 461 Type &operator*() const { 462 return *getTypePtr(); 463 } 464 465 Type *operator->() const { 466 return getTypePtr(); 467 } 468 469 bool isCanonical() const; 470 bool isCanonicalAsParam() const; 471 472 /// isNull - Return true if this QualType doesn't point to a type yet. 473 bool isNull() const { 474 return Value.getPointer().isNull(); 475 } 476 477 /// \brief Determine whether this particular QualType instance has the 478 /// "const" qualifier set, without looking through typedefs that may have 479 /// added "const" at a different level. 480 bool isLocalConstQualified() const { 481 return (getLocalFastQualifiers() & Qualifiers::Const); 482 } 483 484 /// \brief Determine whether this type is const-qualified. 485 bool isConstQualified() const; 486 487 /// \brief Determine whether this particular QualType instance has the 488 /// "restrict" qualifier set, without looking through typedefs that may have 489 /// added "restrict" at a different level. 490 bool isLocalRestrictQualified() const { 491 return (getLocalFastQualifiers() & Qualifiers::Restrict); 492 } 493 494 /// \brief Determine whether this type is restrict-qualified. 495 bool isRestrictQualified() const; 496 497 /// \brief Determine whether this particular QualType instance has the 498 /// "volatile" qualifier set, without looking through typedefs that may have 499 /// added "volatile" at a different level. 500 bool isLocalVolatileQualified() const { 501 return (hasLocalNonFastQualifiers() && getExtQualsUnsafe()->hasVolatile()); 502 } 503 504 /// \brief Determine whether this type is volatile-qualified. 505 bool isVolatileQualified() const; 506 507 /// \brief Determine whether this particular QualType instance has any 508 /// qualifiers, without looking through any typedefs that might add 509 /// qualifiers at a different level. 510 bool hasLocalQualifiers() const { 511 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 512 } 513 514 /// \brief Determine whether this type has any qualifiers. 515 bool hasQualifiers() const; 516 517 /// \brief Determine whether this particular QualType instance has any 518 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 519 /// instance. 520 bool hasLocalNonFastQualifiers() const { 521 return Value.getPointer().is<const ExtQuals*>(); 522 } 523 524 /// \brief Retrieve the set of qualifiers local to this particular QualType 525 /// instance, not including any qualifiers acquired through typedefs or 526 /// other sugar. 527 Qualifiers getLocalQualifiers() const { 528 Qualifiers Quals; 529 if (hasLocalNonFastQualifiers()) 530 Quals = getExtQualsUnsafe()->getQualifiers(); 531 Quals.addFastQualifiers(getLocalFastQualifiers()); 532 return Quals; 533 } 534 535 /// \brief Retrieve the set of qualifiers applied to this type. 536 Qualifiers getQualifiers() const; 537 538 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 539 /// local to this particular QualType instance, not including any qualifiers 540 /// acquired through typedefs or other sugar. 541 unsigned getLocalCVRQualifiers() const { 542 unsigned CVR = getLocalFastQualifiers(); 543 if (isLocalVolatileQualified()) 544 CVR |= Qualifiers::Volatile; 545 return CVR; 546 } 547 548 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 549 /// applied to this type. 550 unsigned getCVRQualifiers() const; 551 552 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 553 /// applied to this type, looking through any number of unqualified array 554 /// types to their element types' qualifiers. 555 unsigned getCVRQualifiersThroughArrayTypes() const; 556 557 bool isConstant(ASTContext& Ctx) const { 558 return QualType::isConstant(*this, Ctx); 559 } 560 561 // Don't promise in the API that anything besides 'const' can be 562 // easily added. 563 564 /// addConst - add the specified type qualifier to this QualType. 565 void addConst() { 566 addFastQualifiers(Qualifiers::Const); 567 } 568 QualType withConst() const { 569 return withFastQualifiers(Qualifiers::Const); 570 } 571 572 void addFastQualifiers(unsigned TQs) { 573 assert(!(TQs & ~Qualifiers::FastMask) 574 && "non-fast qualifier bits set in mask!"); 575 Value.setInt(Value.getInt() | TQs); 576 } 577 578 // FIXME: The remove* functions are semantically broken, because they might 579 // not remove a qualifier stored on a typedef. Most of the with* functions 580 // have the same problem. 581 void removeConst(); 582 void removeVolatile(); 583 void removeRestrict(); 584 void removeCVRQualifiers(unsigned Mask); 585 586 void removeFastQualifiers() { Value.setInt(0); } 587 void removeFastQualifiers(unsigned Mask) { 588 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 589 Value.setInt(Value.getInt() & ~Mask); 590 } 591 592 // Creates a type with the given qualifiers in addition to any 593 // qualifiers already on this type. 594 QualType withFastQualifiers(unsigned TQs) const { 595 QualType T = *this; 596 T.addFastQualifiers(TQs); 597 return T; 598 } 599 600 // Creates a type with exactly the given fast qualifiers, removing 601 // any existing fast qualifiers. 602 QualType withExactFastQualifiers(unsigned TQs) const { 603 return withoutFastQualifiers().withFastQualifiers(TQs); 604 } 605 606 // Removes fast qualifiers, but leaves any extended qualifiers in place. 607 QualType withoutFastQualifiers() const { 608 QualType T = *this; 609 T.removeFastQualifiers(); 610 return T; 611 } 612 613 /// \brief Return this type with all of the instance-specific qualifiers 614 /// removed, but without removing any qualifiers that may have been applied 615 /// through typedefs. 616 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 617 618 /// \brief Return the unqualified form of the given type, which might be 619 /// desugared to eliminate qualifiers introduced via typedefs. 620 QualType getUnqualifiedType() const { 621 QualType T = getLocalUnqualifiedType(); 622 if (!T.hasQualifiers()) 623 return T; 624 625 return getUnqualifiedTypeSlow(); 626 } 627 628 bool isMoreQualifiedThan(QualType Other) const; 629 bool isAtLeastAsQualifiedAs(QualType Other) const; 630 QualType getNonReferenceType() const; 631 632 /// \brief Determine the type of a (typically non-lvalue) expression with the 633 /// specified result type. 634 /// 635 /// This routine should be used for expressions for which the return type is 636 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 637 /// an lvalue. It removes a top-level reference (since there are no 638 /// expressions of reference type) and deletes top-level cvr-qualifiers 639 /// from non-class types (in C++) or all types (in C). 640 QualType getNonLValueExprType(ASTContext &Context) const; 641 642 /// getDesugaredType - Return the specified type with any "sugar" removed from 643 /// the type. This takes off typedefs, typeof's etc. If the outer level of 644 /// the type is already concrete, it returns it unmodified. This is similar 645 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 646 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 647 /// concrete. 648 /// 649 /// Qualifiers are left in place. 650 QualType getDesugaredType() const { 651 return QualType::getDesugaredType(*this); 652 } 653 654 /// operator==/!= - Indicate whether the specified types and qualifiers are 655 /// identical. 656 friend bool operator==(const QualType &LHS, const QualType &RHS) { 657 return LHS.Value == RHS.Value; 658 } 659 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 660 return LHS.Value != RHS.Value; 661 } 662 std::string getAsString() const; 663 664 std::string getAsString(const PrintingPolicy &Policy) const { 665 std::string S; 666 getAsStringInternal(S, Policy); 667 return S; 668 } 669 void getAsStringInternal(std::string &Str, 670 const PrintingPolicy &Policy) const; 671 672 void dump(const char *s) const; 673 void dump() const; 674 675 void Profile(llvm::FoldingSetNodeID &ID) const { 676 ID.AddPointer(getAsOpaquePtr()); 677 } 678 679 /// getAddressSpace - Return the address space of this type. 680 inline unsigned getAddressSpace() const; 681 682 /// GCAttrTypesAttr - Returns gc attribute of this type. 683 inline Qualifiers::GC getObjCGCAttr() const; 684 685 /// isObjCGCWeak true when Type is objc's weak. 686 bool isObjCGCWeak() const { 687 return getObjCGCAttr() == Qualifiers::Weak; 688 } 689 690 /// isObjCGCStrong true when Type is objc's strong. 691 bool isObjCGCStrong() const { 692 return getObjCGCAttr() == Qualifiers::Strong; 693 } 694 695private: 696 // These methods are implemented in a separate translation unit; 697 // "static"-ize them to avoid creating temporary QualTypes in the 698 // caller. 699 static bool isConstant(QualType T, ASTContext& Ctx); 700 static QualType getDesugaredType(QualType T); 701}; 702 703} // end clang. 704 705namespace llvm { 706/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 707/// to a specific Type class. 708template<> struct simplify_type<const ::clang::QualType> { 709 typedef ::clang::Type* SimpleType; 710 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 711 return Val.getTypePtr(); 712 } 713}; 714template<> struct simplify_type< ::clang::QualType> 715 : public simplify_type<const ::clang::QualType> {}; 716 717// Teach SmallPtrSet that QualType is "basically a pointer". 718template<> 719class PointerLikeTypeTraits<clang::QualType> { 720public: 721 static inline void *getAsVoidPointer(clang::QualType P) { 722 return P.getAsOpaquePtr(); 723 } 724 static inline clang::QualType getFromVoidPointer(void *P) { 725 return clang::QualType::getFromOpaquePtr(P); 726 } 727 // Various qualifiers go in low bits. 728 enum { NumLowBitsAvailable = 0 }; 729}; 730 731} // end namespace llvm 732 733namespace clang { 734 735/// Type - This is the base class of the type hierarchy. A central concept 736/// with types is that each type always has a canonical type. A canonical type 737/// is the type with any typedef names stripped out of it or the types it 738/// references. For example, consider: 739/// 740/// typedef int foo; 741/// typedef foo* bar; 742/// 'int *' 'foo *' 'bar' 743/// 744/// There will be a Type object created for 'int'. Since int is canonical, its 745/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 746/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 747/// there is a PointerType that represents 'int*', which, like 'int', is 748/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 749/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 750/// is also 'int*'. 751/// 752/// Non-canonical types are useful for emitting diagnostics, without losing 753/// information about typedefs being used. Canonical types are useful for type 754/// comparisons (they allow by-pointer equality tests) and useful for reasoning 755/// about whether something has a particular form (e.g. is a function type), 756/// because they implicitly, recursively, strip all typedefs out of a type. 757/// 758/// Types, once created, are immutable. 759/// 760class Type { 761public: 762 enum TypeClass { 763#define TYPE(Class, Base) Class, 764#define LAST_TYPE(Class) TypeLast = Class, 765#define ABSTRACT_TYPE(Class, Base) 766#include "clang/AST/TypeNodes.def" 767 TagFirst = Record, TagLast = Enum 768 }; 769 770private: 771 Type(const Type&); // DO NOT IMPLEMENT. 772 void operator=(const Type&); // DO NOT IMPLEMENT. 773 774 QualType CanonicalType; 775 776 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 777 unsigned TC : 8; 778 779 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 780 /// Note that this should stay at the end of the ivars for Type so that 781 /// subclasses can pack their bitfields into the same word. 782 bool Dependent : 1; 783 784 /// \brief Whether the linkage of this type is already known. 785 mutable bool LinkageKnown : 1; 786 787 /// \brief Linkage of this type. 788 mutable unsigned CachedLinkage : 2; 789 790 /// \brief FromPCH - Whether this type comes from a PCH file. 791 mutable bool FromPCH : 1; 792 793 /// \brief Set whether this type comes from a PCH file. 794 void setFromPCH(bool V = true) const { 795 FromPCH = V; 796 } 797 798protected: 799 /// \brief Compute the linkage of this type. 800 virtual Linkage getLinkageImpl() const; 801 802 enum { BitsRemainingInType = 19 }; 803 804 // silence VC++ warning C4355: 'this' : used in base member initializer list 805 Type *this_() { return this; } 806 Type(TypeClass tc, QualType Canonical, bool dependent) 807 : CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical), 808 TC(tc), Dependent(dependent), LinkageKnown(false), 809 CachedLinkage(NoLinkage), FromPCH(false) {} 810 virtual ~Type(); 811 friend class ASTContext; 812 813public: 814 TypeClass getTypeClass() const { return static_cast<TypeClass>(TC); } 815 816 /// \brief Whether this type comes from a PCH file. 817 bool isFromPCH() const { return FromPCH; } 818 819 bool isCanonicalUnqualified() const { 820 return CanonicalType.getTypePtr() == this; 821 } 822 823 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 824 /// object types, function types, and incomplete types. 825 826 /// isIncompleteType - Return true if this is an incomplete type. 827 /// A type that can describe objects, but which lacks information needed to 828 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 829 /// routine will need to determine if the size is actually required. 830 bool isIncompleteType() const; 831 832 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 833 /// type, in other words, not a function type. 834 bool isIncompleteOrObjectType() const { 835 return !isFunctionType(); 836 } 837 838 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 839 bool isPODType() const; 840 841 /// isLiteralType - Return true if this is a literal type 842 /// (C++0x [basic.types]p10) 843 bool isLiteralType() const; 844 845 /// isVariablyModifiedType (C99 6.7.5.2p2) - Return true for variable array 846 /// types that have a non-constant expression. This does not include "[]". 847 bool isVariablyModifiedType() const; 848 849 /// Helper methods to distinguish type categories. All type predicates 850 /// operate on the canonical type, ignoring typedefs and qualifiers. 851 852 /// isBuiltinType - returns true if the type is a builtin type. 853 bool isBuiltinType() const; 854 855 /// isSpecificBuiltinType - Test for a particular builtin type. 856 bool isSpecificBuiltinType(unsigned K) const; 857 858 /// isIntegerType() does *not* include complex integers (a GCC extension). 859 /// isComplexIntegerType() can be used to test for complex integers. 860 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 861 bool isEnumeralType() const; 862 bool isBooleanType() const; 863 bool isCharType() const; 864 bool isWideCharType() const; 865 bool isAnyCharacterType() const; 866 bool isIntegralType(ASTContext &Ctx) const; 867 868 /// \brief Determine whether this type is an integral or enumeration type. 869 bool isIntegralOrEnumerationType() const; 870 871 /// Floating point categories. 872 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 873 /// isComplexType() does *not* include complex integers (a GCC extension). 874 /// isComplexIntegerType() can be used to test for complex integers. 875 bool isComplexType() const; // C99 6.2.5p11 (complex) 876 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 877 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 878 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 879 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 880 bool isVoidType() const; // C99 6.2.5p19 881 bool isDerivedType() const; // C99 6.2.5p20 882 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 883 bool isAggregateType() const; 884 885 // Type Predicates: Check to see if this type is structurally the specified 886 // type, ignoring typedefs and qualifiers. 887 bool isFunctionType() const; 888 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 889 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 890 bool isPointerType() const; 891 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 892 bool isBlockPointerType() const; 893 bool isVoidPointerType() const; 894 bool isReferenceType() const; 895 bool isLValueReferenceType() const; 896 bool isRValueReferenceType() const; 897 bool isFunctionPointerType() const; 898 bool isMemberPointerType() const; 899 bool isMemberFunctionPointerType() const; 900 bool isArrayType() const; 901 bool isConstantArrayType() const; 902 bool isIncompleteArrayType() const; 903 bool isVariableArrayType() const; 904 bool isDependentSizedArrayType() const; 905 bool isRecordType() const; 906 bool isClassType() const; 907 bool isStructureType() const; 908 bool isStructureOrClassType() const; 909 bool isUnionType() const; 910 bool isComplexIntegerType() const; // GCC _Complex integer type. 911 bool isVectorType() const; // GCC vector type. 912 bool isExtVectorType() const; // Extended vector type. 913 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 914 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 915 // for the common case. 916 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 917 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 918 bool isObjCQualifiedIdType() const; // id<foo> 919 bool isObjCQualifiedClassType() const; // Class<foo> 920 bool isObjCIdType() const; // id 921 bool isObjCClassType() const; // Class 922 bool isObjCSelType() const; // Class 923 bool isObjCBuiltinType() const; // 'id' or 'Class' 924 bool isTemplateTypeParmType() const; // C++ template type parameter 925 bool isNullPtrType() const; // C++0x nullptr_t 926 927 /// isDependentType - Whether this type is a dependent type, meaning 928 /// that its definition somehow depends on a template parameter 929 /// (C++ [temp.dep.type]). 930 bool isDependentType() const { return Dependent; } 931 bool isOverloadableType() const; 932 933 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 934 bool isElaboratedTypeSpecifier() const; 935 936 /// hasPointerRepresentation - Whether this type is represented 937 /// natively as a pointer; this includes pointers, references, block 938 /// pointers, and Objective-C interface, qualified id, and qualified 939 /// interface types, as well as nullptr_t. 940 bool hasPointerRepresentation() const; 941 942 /// hasObjCPointerRepresentation - Whether this type can represent 943 /// an objective pointer type for the purpose of GC'ability 944 bool hasObjCPointerRepresentation() const; 945 946 /// \brief Determine whether this type has an integer representation 947 /// of some sort, e.g., it is an integer type or a vector. 948 bool hasIntegerRepresentation() const; 949 950 /// \brief Determine whether this type has an signed integer representation 951 /// of some sort, e.g., it is an signed integer type or a vector. 952 bool hasSignedIntegerRepresentation() const; 953 954 /// \brief Determine whether this type has an unsigned integer representation 955 /// of some sort, e.g., it is an unsigned integer type or a vector. 956 bool hasUnsignedIntegerRepresentation() const; 957 958 /// \brief Determine whether this type has a floating-point representation 959 /// of some sort, e.g., it is a floating-point type or a vector thereof. 960 bool hasFloatingRepresentation() const; 961 962 // Type Checking Functions: Check to see if this type is structurally the 963 // specified type, ignoring typedefs and qualifiers, and return a pointer to 964 // the best type we can. 965 const RecordType *getAsStructureType() const; 966 /// NOTE: getAs*ArrayType are methods on ASTContext. 967 const RecordType *getAsUnionType() const; 968 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 969 // The following is a convenience method that returns an ObjCObjectPointerType 970 // for object declared using an interface. 971 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 972 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 973 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 974 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 975 976 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 977 /// because the type is a RecordType or because it is the injected-class-name 978 /// type of a class template or class template partial specialization. 979 CXXRecordDecl *getAsCXXRecordDecl() const; 980 981 // Member-template getAs<specific type>'. This scheme will eventually 982 // replace the specific getAsXXXX methods above. 983 // 984 // There are some specializations of this member template listed 985 // immediately following this class. 986 template <typename T> const T *getAs() const; 987 988 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 989 /// element type of the array, potentially with type qualifiers missing. 990 /// This method should never be used when type qualifiers are meaningful. 991 const Type *getArrayElementTypeNoTypeQual() const; 992 993 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 994 /// pointer, this returns the respective pointee. 995 QualType getPointeeType() const; 996 997 /// getUnqualifiedDesugaredType() - Return the specified type with 998 /// any "sugar" removed from the type, removing any typedefs, 999 /// typeofs, etc., as well as any qualifiers. 1000 const Type *getUnqualifiedDesugaredType() const; 1001 1002 /// More type predicates useful for type checking/promotion 1003 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1004 1005 /// isSignedIntegerType - Return true if this is an integer type that is 1006 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1007 /// an enum decl which has a signed representation, or a vector of signed 1008 /// integer element type. 1009 bool isSignedIntegerType() const; 1010 1011 /// isUnsignedIntegerType - Return true if this is an integer type that is 1012 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 1013 /// decl which has an unsigned representation, or a vector of unsigned integer 1014 /// element type. 1015 bool isUnsignedIntegerType() const; 1016 1017 /// isConstantSizeType - Return true if this is not a variable sized type, 1018 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1019 /// incomplete types. 1020 bool isConstantSizeType() const; 1021 1022 /// isSpecifierType - Returns true if this type can be represented by some 1023 /// set of type specifiers. 1024 bool isSpecifierType() const; 1025 1026 /// \brief Determine the linkage of this type. 1027 Linkage getLinkage() const; 1028 1029 /// \brief Note that the linkage is no longer known. 1030 void ClearLinkageCache(); 1031 1032 const char *getTypeClassName() const; 1033 1034 QualType getCanonicalTypeInternal() const { 1035 return CanonicalType; 1036 } 1037 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1038 void dump() const; 1039 static bool classof(const Type *) { return true; } 1040 1041 friend class PCHReader; 1042 friend class PCHWriter; 1043}; 1044 1045template <> inline const TypedefType *Type::getAs() const { 1046 return dyn_cast<TypedefType>(this); 1047} 1048 1049// We can do canonical leaf types faster, because we don't have to 1050// worry about preserving child type decoration. 1051#define TYPE(Class, Base) 1052#define LEAF_TYPE(Class) \ 1053template <> inline const Class##Type *Type::getAs() const { \ 1054 return dyn_cast<Class##Type>(CanonicalType); \ 1055} 1056#include "clang/AST/TypeNodes.def" 1057 1058 1059/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1060/// types are always canonical and have a literal name field. 1061class BuiltinType : public Type { 1062public: 1063 enum Kind { 1064 Void, 1065 1066 Bool, // This is bool and/or _Bool. 1067 Char_U, // This is 'char' for targets where char is unsigned. 1068 UChar, // This is explicitly qualified unsigned char. 1069 Char16, // This is 'char16_t' for C++. 1070 Char32, // This is 'char32_t' for C++. 1071 UShort, 1072 UInt, 1073 ULong, 1074 ULongLong, 1075 UInt128, // __uint128_t 1076 1077 Char_S, // This is 'char' for targets where char is signed. 1078 SChar, // This is explicitly qualified signed char. 1079 WChar, // This is 'wchar_t' for C++. 1080 Short, 1081 Int, 1082 Long, 1083 LongLong, 1084 Int128, // __int128_t 1085 1086 Float, Double, LongDouble, 1087 1088 NullPtr, // This is the type of C++0x 'nullptr'. 1089 1090 Overload, // This represents the type of an overloaded function declaration. 1091 Dependent, // This represents the type of a type-dependent expression. 1092 1093 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1094 // that has not been deduced yet. 1095 1096 /// The primitive Objective C 'id' type. The type pointed to by the 1097 /// user-visible 'id' type. Only ever shows up in an AST as the base 1098 /// type of an ObjCObjectType. 1099 ObjCId, 1100 1101 /// The primitive Objective C 'Class' type. The type pointed to by the 1102 /// user-visible 'Class' type. Only ever shows up in an AST as the 1103 /// base type of an ObjCObjectType. 1104 ObjCClass, 1105 1106 ObjCSel // This represents the ObjC 'SEL' type. 1107 }; 1108private: 1109 Kind TypeKind; 1110 1111protected: 1112 virtual Linkage getLinkageImpl() const; 1113 1114public: 1115 BuiltinType(Kind K) 1116 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent)), 1117 TypeKind(K) {} 1118 1119 Kind getKind() const { return TypeKind; } 1120 const char *getName(const LangOptions &LO) const; 1121 1122 bool isSugared() const { return false; } 1123 QualType desugar() const { return QualType(this, 0); } 1124 1125 bool isInteger() const { 1126 return TypeKind >= Bool && TypeKind <= Int128; 1127 } 1128 1129 bool isSignedInteger() const { 1130 return TypeKind >= Char_S && TypeKind <= Int128; 1131 } 1132 1133 bool isUnsignedInteger() const { 1134 return TypeKind >= Bool && TypeKind <= UInt128; 1135 } 1136 1137 bool isFloatingPoint() const { 1138 return TypeKind >= Float && TypeKind <= LongDouble; 1139 } 1140 1141 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1142 static bool classof(const BuiltinType *) { return true; } 1143}; 1144 1145/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1146/// types (_Complex float etc) as well as the GCC integer complex extensions. 1147/// 1148class ComplexType : public Type, public llvm::FoldingSetNode { 1149 QualType ElementType; 1150 ComplexType(QualType Element, QualType CanonicalPtr) : 1151 Type(Complex, CanonicalPtr, Element->isDependentType()), 1152 ElementType(Element) { 1153 } 1154 friend class ASTContext; // ASTContext creates these. 1155 1156protected: 1157 virtual Linkage getLinkageImpl() const; 1158 1159public: 1160 QualType getElementType() const { return ElementType; } 1161 1162 bool isSugared() const { return false; } 1163 QualType desugar() const { return QualType(this, 0); } 1164 1165 void Profile(llvm::FoldingSetNodeID &ID) { 1166 Profile(ID, getElementType()); 1167 } 1168 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1169 ID.AddPointer(Element.getAsOpaquePtr()); 1170 } 1171 1172 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1173 static bool classof(const ComplexType *) { return true; } 1174}; 1175 1176/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1177/// 1178class PointerType : public Type, public llvm::FoldingSetNode { 1179 QualType PointeeType; 1180 1181 PointerType(QualType Pointee, QualType CanonicalPtr) : 1182 Type(Pointer, CanonicalPtr, Pointee->isDependentType()), PointeeType(Pointee) { 1183 } 1184 friend class ASTContext; // ASTContext creates these. 1185 1186protected: 1187 virtual Linkage getLinkageImpl() const; 1188 1189public: 1190 1191 QualType getPointeeType() const { return PointeeType; } 1192 1193 bool isSugared() const { return false; } 1194 QualType desugar() const { return QualType(this, 0); } 1195 1196 void Profile(llvm::FoldingSetNodeID &ID) { 1197 Profile(ID, getPointeeType()); 1198 } 1199 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1200 ID.AddPointer(Pointee.getAsOpaquePtr()); 1201 } 1202 1203 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1204 static bool classof(const PointerType *) { return true; } 1205}; 1206 1207/// BlockPointerType - pointer to a block type. 1208/// This type is to represent types syntactically represented as 1209/// "void (^)(int)", etc. Pointee is required to always be a function type. 1210/// 1211class BlockPointerType : public Type, public llvm::FoldingSetNode { 1212 QualType PointeeType; // Block is some kind of pointer type 1213 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1214 Type(BlockPointer, CanonicalCls, Pointee->isDependentType()), 1215 PointeeType(Pointee) { 1216 } 1217 friend class ASTContext; // ASTContext creates these. 1218 1219protected: 1220 virtual Linkage getLinkageImpl() const; 1221 1222public: 1223 1224 // Get the pointee type. Pointee is required to always be a function type. 1225 QualType getPointeeType() const { return PointeeType; } 1226 1227 bool isSugared() const { return false; } 1228 QualType desugar() const { return QualType(this, 0); } 1229 1230 void Profile(llvm::FoldingSetNodeID &ID) { 1231 Profile(ID, getPointeeType()); 1232 } 1233 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1234 ID.AddPointer(Pointee.getAsOpaquePtr()); 1235 } 1236 1237 static bool classof(const Type *T) { 1238 return T->getTypeClass() == BlockPointer; 1239 } 1240 static bool classof(const BlockPointerType *) { return true; } 1241}; 1242 1243/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1244/// 1245class ReferenceType : public Type, public llvm::FoldingSetNode { 1246 QualType PointeeType; 1247 1248 /// True if the type was originally spelled with an lvalue sigil. 1249 /// This is never true of rvalue references but can also be false 1250 /// on lvalue references because of C++0x [dcl.typedef]p9, 1251 /// as follows: 1252 /// 1253 /// typedef int &ref; // lvalue, spelled lvalue 1254 /// typedef int &&rvref; // rvalue 1255 /// ref &a; // lvalue, inner ref, spelled lvalue 1256 /// ref &&a; // lvalue, inner ref 1257 /// rvref &a; // lvalue, inner ref, spelled lvalue 1258 /// rvref &&a; // rvalue, inner ref 1259 bool SpelledAsLValue; 1260 1261 /// True if the inner type is a reference type. This only happens 1262 /// in non-canonical forms. 1263 bool InnerRef; 1264 1265protected: 1266 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1267 bool SpelledAsLValue) : 1268 Type(tc, CanonicalRef, Referencee->isDependentType()), 1269 PointeeType(Referencee), SpelledAsLValue(SpelledAsLValue), 1270 InnerRef(Referencee->isReferenceType()) { 1271 } 1272 1273 virtual Linkage getLinkageImpl() const; 1274 1275public: 1276 bool isSpelledAsLValue() const { return SpelledAsLValue; } 1277 bool isInnerRef() const { return InnerRef; } 1278 1279 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1280 QualType getPointeeType() const { 1281 // FIXME: this might strip inner qualifiers; okay? 1282 const ReferenceType *T = this; 1283 while (T->InnerRef) 1284 T = T->PointeeType->getAs<ReferenceType>(); 1285 return T->PointeeType; 1286 } 1287 1288 void Profile(llvm::FoldingSetNodeID &ID) { 1289 Profile(ID, PointeeType, SpelledAsLValue); 1290 } 1291 static void Profile(llvm::FoldingSetNodeID &ID, 1292 QualType Referencee, 1293 bool SpelledAsLValue) { 1294 ID.AddPointer(Referencee.getAsOpaquePtr()); 1295 ID.AddBoolean(SpelledAsLValue); 1296 } 1297 1298 static bool classof(const Type *T) { 1299 return T->getTypeClass() == LValueReference || 1300 T->getTypeClass() == RValueReference; 1301 } 1302 static bool classof(const ReferenceType *) { return true; } 1303}; 1304 1305/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1306/// 1307class LValueReferenceType : public ReferenceType { 1308 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1309 bool SpelledAsLValue) : 1310 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1311 {} 1312 friend class ASTContext; // ASTContext creates these 1313public: 1314 bool isSugared() const { return false; } 1315 QualType desugar() const { return QualType(this, 0); } 1316 1317 static bool classof(const Type *T) { 1318 return T->getTypeClass() == LValueReference; 1319 } 1320 static bool classof(const LValueReferenceType *) { return true; } 1321}; 1322 1323/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1324/// 1325class RValueReferenceType : public ReferenceType { 1326 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1327 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1328 } 1329 friend class ASTContext; // ASTContext creates these 1330public: 1331 bool isSugared() const { return false; } 1332 QualType desugar() const { return QualType(this, 0); } 1333 1334 static bool classof(const Type *T) { 1335 return T->getTypeClass() == RValueReference; 1336 } 1337 static bool classof(const RValueReferenceType *) { return true; } 1338}; 1339 1340/// MemberPointerType - C++ 8.3.3 - Pointers to members 1341/// 1342class MemberPointerType : public Type, public llvm::FoldingSetNode { 1343 QualType PointeeType; 1344 /// The class of which the pointee is a member. Must ultimately be a 1345 /// RecordType, but could be a typedef or a template parameter too. 1346 const Type *Class; 1347 1348 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1349 Type(MemberPointer, CanonicalPtr, 1350 Cls->isDependentType() || Pointee->isDependentType()), 1351 PointeeType(Pointee), Class(Cls) { 1352 } 1353 friend class ASTContext; // ASTContext creates these. 1354 1355protected: 1356 virtual Linkage getLinkageImpl() const; 1357 1358public: 1359 1360 QualType getPointeeType() const { return PointeeType; } 1361 1362 const Type *getClass() const { return Class; } 1363 1364 bool isSugared() const { return false; } 1365 QualType desugar() const { return QualType(this, 0); } 1366 1367 void Profile(llvm::FoldingSetNodeID &ID) { 1368 Profile(ID, getPointeeType(), getClass()); 1369 } 1370 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1371 const Type *Class) { 1372 ID.AddPointer(Pointee.getAsOpaquePtr()); 1373 ID.AddPointer(Class); 1374 } 1375 1376 static bool classof(const Type *T) { 1377 return T->getTypeClass() == MemberPointer; 1378 } 1379 static bool classof(const MemberPointerType *) { return true; } 1380}; 1381 1382/// ArrayType - C99 6.7.5.2 - Array Declarators. 1383/// 1384class ArrayType : public Type, public llvm::FoldingSetNode { 1385public: 1386 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1387 /// an array with a static size (e.g. int X[static 4]), or an array 1388 /// with a star size (e.g. int X[*]). 1389 /// 'static' is only allowed on function parameters. 1390 enum ArraySizeModifier { 1391 Normal, Static, Star 1392 }; 1393private: 1394 /// ElementType - The element type of the array. 1395 QualType ElementType; 1396 1397 // NOTE: VC++ treats enums as signed, avoid using the ArraySizeModifier enum 1398 /// NOTE: These fields are packed into the bitfields space in the Type class. 1399 unsigned SizeModifier : 2; 1400 1401 /// IndexTypeQuals - Capture qualifiers in declarations like: 1402 /// 'int X[static restrict 4]'. For function parameters only. 1403 unsigned IndexTypeQuals : 3; 1404 1405protected: 1406 // C++ [temp.dep.type]p1: 1407 // A type is dependent if it is... 1408 // - an array type constructed from any dependent type or whose 1409 // size is specified by a constant expression that is 1410 // value-dependent, 1411 ArrayType(TypeClass tc, QualType et, QualType can, 1412 ArraySizeModifier sm, unsigned tq) 1413 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray), 1414 ElementType(et), SizeModifier(sm), IndexTypeQuals(tq) {} 1415 1416 friend class ASTContext; // ASTContext creates these. 1417 1418 virtual Linkage getLinkageImpl() const; 1419 1420public: 1421 QualType getElementType() const { return ElementType; } 1422 ArraySizeModifier getSizeModifier() const { 1423 return ArraySizeModifier(SizeModifier); 1424 } 1425 Qualifiers getIndexTypeQualifiers() const { 1426 return Qualifiers::fromCVRMask(IndexTypeQuals); 1427 } 1428 unsigned getIndexTypeCVRQualifiers() const { return IndexTypeQuals; } 1429 1430 static bool classof(const Type *T) { 1431 return T->getTypeClass() == ConstantArray || 1432 T->getTypeClass() == VariableArray || 1433 T->getTypeClass() == IncompleteArray || 1434 T->getTypeClass() == DependentSizedArray; 1435 } 1436 static bool classof(const ArrayType *) { return true; } 1437}; 1438 1439/// ConstantArrayType - This class represents the canonical version of 1440/// C arrays with a specified constant size. For example, the canonical 1441/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1442/// type is 'int' and the size is 404. 1443class ConstantArrayType : public ArrayType { 1444 llvm::APInt Size; // Allows us to unique the type. 1445 1446 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1447 ArraySizeModifier sm, unsigned tq) 1448 : ArrayType(ConstantArray, et, can, sm, tq), 1449 Size(size) {} 1450protected: 1451 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1452 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1453 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1454 friend class ASTContext; // ASTContext creates these. 1455public: 1456 const llvm::APInt &getSize() const { return Size; } 1457 bool isSugared() const { return false; } 1458 QualType desugar() const { return QualType(this, 0); } 1459 1460 void Profile(llvm::FoldingSetNodeID &ID) { 1461 Profile(ID, getElementType(), getSize(), 1462 getSizeModifier(), getIndexTypeCVRQualifiers()); 1463 } 1464 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1465 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1466 unsigned TypeQuals) { 1467 ID.AddPointer(ET.getAsOpaquePtr()); 1468 ID.AddInteger(ArraySize.getZExtValue()); 1469 ID.AddInteger(SizeMod); 1470 ID.AddInteger(TypeQuals); 1471 } 1472 static bool classof(const Type *T) { 1473 return T->getTypeClass() == ConstantArray; 1474 } 1475 static bool classof(const ConstantArrayType *) { return true; } 1476}; 1477 1478/// IncompleteArrayType - This class represents C arrays with an unspecified 1479/// size. For example 'int A[]' has an IncompleteArrayType where the element 1480/// type is 'int' and the size is unspecified. 1481class IncompleteArrayType : public ArrayType { 1482 1483 IncompleteArrayType(QualType et, QualType can, 1484 ArraySizeModifier sm, unsigned tq) 1485 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1486 friend class ASTContext; // ASTContext creates these. 1487public: 1488 bool isSugared() const { return false; } 1489 QualType desugar() const { return QualType(this, 0); } 1490 1491 static bool classof(const Type *T) { 1492 return T->getTypeClass() == IncompleteArray; 1493 } 1494 static bool classof(const IncompleteArrayType *) { return true; } 1495 1496 friend class StmtIteratorBase; 1497 1498 void Profile(llvm::FoldingSetNodeID &ID) { 1499 Profile(ID, getElementType(), getSizeModifier(), 1500 getIndexTypeCVRQualifiers()); 1501 } 1502 1503 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1504 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1505 ID.AddPointer(ET.getAsOpaquePtr()); 1506 ID.AddInteger(SizeMod); 1507 ID.AddInteger(TypeQuals); 1508 } 1509}; 1510 1511/// VariableArrayType - This class represents C arrays with a specified size 1512/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1513/// Since the size expression is an arbitrary expression, we store it as such. 1514/// 1515/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1516/// should not be: two lexically equivalent variable array types could mean 1517/// different things, for example, these variables do not have the same type 1518/// dynamically: 1519/// 1520/// void foo(int x) { 1521/// int Y[x]; 1522/// ++x; 1523/// int Z[x]; 1524/// } 1525/// 1526class VariableArrayType : public ArrayType { 1527 /// SizeExpr - An assignment expression. VLA's are only permitted within 1528 /// a function block. 1529 Stmt *SizeExpr; 1530 /// Brackets - The left and right array brackets. 1531 SourceRange Brackets; 1532 1533 VariableArrayType(QualType et, QualType can, Expr *e, 1534 ArraySizeModifier sm, unsigned tq, 1535 SourceRange brackets) 1536 : ArrayType(VariableArray, et, can, sm, tq), 1537 SizeExpr((Stmt*) e), Brackets(brackets) {} 1538 friend class ASTContext; // ASTContext creates these. 1539 1540public: 1541 Expr *getSizeExpr() const { 1542 // We use C-style casts instead of cast<> here because we do not wish 1543 // to have a dependency of Type.h on Stmt.h/Expr.h. 1544 return (Expr*) SizeExpr; 1545 } 1546 SourceRange getBracketsRange() const { return Brackets; } 1547 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1548 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1549 1550 bool isSugared() const { return false; } 1551 QualType desugar() const { return QualType(this, 0); } 1552 1553 static bool classof(const Type *T) { 1554 return T->getTypeClass() == VariableArray; 1555 } 1556 static bool classof(const VariableArrayType *) { return true; } 1557 1558 friend class StmtIteratorBase; 1559 1560 void Profile(llvm::FoldingSetNodeID &ID) { 1561 assert(0 && "Cannnot unique VariableArrayTypes."); 1562 } 1563}; 1564 1565/// DependentSizedArrayType - This type represents an array type in 1566/// C++ whose size is a value-dependent expression. For example: 1567/// 1568/// \code 1569/// template<typename T, int Size> 1570/// class array { 1571/// T data[Size]; 1572/// }; 1573/// \endcode 1574/// 1575/// For these types, we won't actually know what the array bound is 1576/// until template instantiation occurs, at which point this will 1577/// become either a ConstantArrayType or a VariableArrayType. 1578class DependentSizedArrayType : public ArrayType { 1579 ASTContext &Context; 1580 1581 /// \brief An assignment expression that will instantiate to the 1582 /// size of the array. 1583 /// 1584 /// The expression itself might be NULL, in which case the array 1585 /// type will have its size deduced from an initializer. 1586 Stmt *SizeExpr; 1587 1588 /// Brackets - The left and right array brackets. 1589 SourceRange Brackets; 1590 1591 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1592 Expr *e, ArraySizeModifier sm, unsigned tq, 1593 SourceRange brackets) 1594 : ArrayType(DependentSizedArray, et, can, sm, tq), 1595 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1596 friend class ASTContext; // ASTContext creates these. 1597 1598public: 1599 Expr *getSizeExpr() const { 1600 // We use C-style casts instead of cast<> here because we do not wish 1601 // to have a dependency of Type.h on Stmt.h/Expr.h. 1602 return (Expr*) SizeExpr; 1603 } 1604 SourceRange getBracketsRange() const { return Brackets; } 1605 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1606 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1607 1608 bool isSugared() const { return false; } 1609 QualType desugar() const { return QualType(this, 0); } 1610 1611 static bool classof(const Type *T) { 1612 return T->getTypeClass() == DependentSizedArray; 1613 } 1614 static bool classof(const DependentSizedArrayType *) { return true; } 1615 1616 friend class StmtIteratorBase; 1617 1618 1619 void Profile(llvm::FoldingSetNodeID &ID) { 1620 Profile(ID, Context, getElementType(), 1621 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1622 } 1623 1624 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1625 QualType ET, ArraySizeModifier SizeMod, 1626 unsigned TypeQuals, Expr *E); 1627}; 1628 1629/// DependentSizedExtVectorType - This type represent an extended vector type 1630/// where either the type or size is dependent. For example: 1631/// @code 1632/// template<typename T, int Size> 1633/// class vector { 1634/// typedef T __attribute__((ext_vector_type(Size))) type; 1635/// } 1636/// @endcode 1637class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1638 ASTContext &Context; 1639 Expr *SizeExpr; 1640 /// ElementType - The element type of the array. 1641 QualType ElementType; 1642 SourceLocation loc; 1643 1644 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1645 QualType can, Expr *SizeExpr, SourceLocation loc) 1646 : Type (DependentSizedExtVector, can, true), 1647 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1648 loc(loc) {} 1649 friend class ASTContext; 1650 1651public: 1652 Expr *getSizeExpr() const { return SizeExpr; } 1653 QualType getElementType() const { return ElementType; } 1654 SourceLocation getAttributeLoc() const { return loc; } 1655 1656 bool isSugared() const { return false; } 1657 QualType desugar() const { return QualType(this, 0); } 1658 1659 static bool classof(const Type *T) { 1660 return T->getTypeClass() == DependentSizedExtVector; 1661 } 1662 static bool classof(const DependentSizedExtVectorType *) { return true; } 1663 1664 void Profile(llvm::FoldingSetNodeID &ID) { 1665 Profile(ID, Context, getElementType(), getSizeExpr()); 1666 } 1667 1668 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1669 QualType ElementType, Expr *SizeExpr); 1670}; 1671 1672 1673/// VectorType - GCC generic vector type. This type is created using 1674/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1675/// bytes; or from an Altivec __vector or vector declaration. 1676/// Since the constructor takes the number of vector elements, the 1677/// client is responsible for converting the size into the number of elements. 1678class VectorType : public Type, public llvm::FoldingSetNode { 1679public: 1680 enum AltiVecSpecific { 1681 NotAltiVec, // is not AltiVec vector 1682 AltiVec, // is AltiVec vector 1683 Pixel, // is AltiVec 'vector Pixel' 1684 Bool // is AltiVec 'vector bool ...' 1685 }; 1686protected: 1687 /// ElementType - The element type of the vector. 1688 QualType ElementType; 1689 1690 /// NumElements - The number of elements in the vector. 1691 unsigned NumElements; 1692 1693 AltiVecSpecific AltiVecSpec; 1694 1695 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1696 AltiVecSpecific altiVecSpec) : 1697 Type(Vector, canonType, vecType->isDependentType()), 1698 ElementType(vecType), NumElements(nElements), AltiVecSpec(altiVecSpec) {} 1699 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1700 QualType canonType, AltiVecSpecific altiVecSpec) 1701 : Type(tc, canonType, vecType->isDependentType()), ElementType(vecType), 1702 NumElements(nElements), AltiVecSpec(altiVecSpec) {} 1703 friend class ASTContext; // ASTContext creates these. 1704 1705 virtual Linkage getLinkageImpl() const; 1706 1707public: 1708 1709 QualType getElementType() const { return ElementType; } 1710 unsigned getNumElements() const { return NumElements; } 1711 1712 bool isSugared() const { return false; } 1713 QualType desugar() const { return QualType(this, 0); } 1714 1715 AltiVecSpecific getAltiVecSpecific() const { return AltiVecSpec; } 1716 1717 void Profile(llvm::FoldingSetNodeID &ID) { 1718 Profile(ID, getElementType(), getNumElements(), getTypeClass(), AltiVecSpec); 1719 } 1720 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 1721 unsigned NumElements, TypeClass TypeClass, 1722 unsigned AltiVecSpec) { 1723 ID.AddPointer(ElementType.getAsOpaquePtr()); 1724 ID.AddInteger(NumElements); 1725 ID.AddInteger(TypeClass); 1726 ID.AddInteger(AltiVecSpec); 1727 } 1728 1729 static bool classof(const Type *T) { 1730 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 1731 } 1732 static bool classof(const VectorType *) { return true; } 1733}; 1734 1735/// ExtVectorType - Extended vector type. This type is created using 1736/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 1737/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 1738/// class enables syntactic extensions, like Vector Components for accessing 1739/// points, colors, and textures (modeled after OpenGL Shading Language). 1740class ExtVectorType : public VectorType { 1741 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 1742 VectorType(ExtVector, vecType, nElements, canonType, NotAltiVec) {} 1743 friend class ASTContext; // ASTContext creates these. 1744public: 1745 static int getPointAccessorIdx(char c) { 1746 switch (c) { 1747 default: return -1; 1748 case 'x': return 0; 1749 case 'y': return 1; 1750 case 'z': return 2; 1751 case 'w': return 3; 1752 } 1753 } 1754 static int getNumericAccessorIdx(char c) { 1755 switch (c) { 1756 default: return -1; 1757 case '0': return 0; 1758 case '1': return 1; 1759 case '2': return 2; 1760 case '3': return 3; 1761 case '4': return 4; 1762 case '5': return 5; 1763 case '6': return 6; 1764 case '7': return 7; 1765 case '8': return 8; 1766 case '9': return 9; 1767 case 'A': 1768 case 'a': return 10; 1769 case 'B': 1770 case 'b': return 11; 1771 case 'C': 1772 case 'c': return 12; 1773 case 'D': 1774 case 'd': return 13; 1775 case 'E': 1776 case 'e': return 14; 1777 case 'F': 1778 case 'f': return 15; 1779 } 1780 } 1781 1782 static int getAccessorIdx(char c) { 1783 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 1784 return getNumericAccessorIdx(c); 1785 } 1786 1787 bool isAccessorWithinNumElements(char c) const { 1788 if (int idx = getAccessorIdx(c)+1) 1789 return unsigned(idx-1) < NumElements; 1790 return false; 1791 } 1792 bool isSugared() const { return false; } 1793 QualType desugar() const { return QualType(this, 0); } 1794 1795 static bool classof(const Type *T) { 1796 return T->getTypeClass() == ExtVector; 1797 } 1798 static bool classof(const ExtVectorType *) { return true; } 1799}; 1800 1801/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 1802/// class of FunctionNoProtoType and FunctionProtoType. 1803/// 1804class FunctionType : public Type { 1805 virtual void ANCHOR(); // Key function for FunctionType. 1806 1807 /// SubClassData - This field is owned by the subclass, put here to pack 1808 /// tightly with the ivars in Type. 1809 bool SubClassData : 1; 1810 1811 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1812 /// other bitfields. 1813 /// The qualifiers are part of FunctionProtoType because... 1814 /// 1815 /// C++ 8.3.5p4: The return type, the parameter type list and the 1816 /// cv-qualifier-seq, [...], are part of the function type. 1817 /// 1818 unsigned TypeQuals : 3; 1819 1820 /// NoReturn - Indicates if the function type is attribute noreturn. 1821 unsigned NoReturn : 1; 1822 1823 /// RegParm - How many arguments to pass inreg. 1824 unsigned RegParm : 3; 1825 1826 /// CallConv - The calling convention used by the function. 1827 unsigned CallConv : 3; 1828 1829 // The type returned by the function. 1830 QualType ResultType; 1831 1832 public: 1833 // This class is used for passing arround the information needed to 1834 // construct a call. It is not actually used for storage, just for 1835 // factoring together common arguments. 1836 // If you add a field (say Foo), other than the obvious places (both, constructors, 1837 // compile failures), what you need to update is 1838 // * Operetor== 1839 // * getFoo 1840 // * withFoo 1841 // * functionType. Add Foo, getFoo. 1842 // * ASTContext::getFooType 1843 // * ASTContext::mergeFunctionTypes 1844 // * FunctionNoProtoType::Profile 1845 // * FunctionProtoType::Profile 1846 // * TypePrinter::PrintFunctionProto 1847 // * PCH read and write 1848 // * Codegen 1849 1850 class ExtInfo { 1851 public: 1852 // Constructor with no defaults. Use this when you know that you 1853 // have all the elements (when reading a PCH file for example). 1854 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) : 1855 NoReturn(noReturn), RegParm(regParm), CC(cc) {} 1856 1857 // Constructor with all defaults. Use when for example creating a 1858 // function know to use defaults. 1859 ExtInfo() : NoReturn(false), RegParm(0), CC(CC_Default) {} 1860 1861 bool getNoReturn() const { return NoReturn; } 1862 unsigned getRegParm() const { return RegParm; } 1863 CallingConv getCC() const { return CC; } 1864 1865 bool operator==(const ExtInfo &Other) const { 1866 return getNoReturn() == Other.getNoReturn() && 1867 getRegParm() == Other.getRegParm() && 1868 getCC() == Other.getCC(); 1869 } 1870 bool operator!=(const ExtInfo &Other) const { 1871 return !(*this == Other); 1872 } 1873 1874 // Note that we don't have setters. That is by design, use 1875 // the following with methods instead of mutating these objects. 1876 1877 ExtInfo withNoReturn(bool noReturn) const { 1878 return ExtInfo(noReturn, getRegParm(), getCC()); 1879 } 1880 1881 ExtInfo withRegParm(unsigned RegParm) const { 1882 return ExtInfo(getNoReturn(), RegParm, getCC()); 1883 } 1884 1885 ExtInfo withCallingConv(CallingConv cc) const { 1886 return ExtInfo(getNoReturn(), getRegParm(), cc); 1887 } 1888 1889 private: 1890 // True if we have __attribute__((noreturn)) 1891 bool NoReturn; 1892 // The value passed to __attribute__((regparm(x))) 1893 unsigned RegParm; 1894 // The calling convention as specified via 1895 // __attribute__((cdecl|stdcall|fastcall|thiscall)) 1896 CallingConv CC; 1897 }; 1898 1899protected: 1900 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 1901 unsigned typeQuals, QualType Canonical, bool Dependent, 1902 const ExtInfo &Info) 1903 : Type(tc, Canonical, Dependent), 1904 SubClassData(SubclassInfo), TypeQuals(typeQuals), 1905 NoReturn(Info.getNoReturn()), 1906 RegParm(Info.getRegParm()), CallConv(Info.getCC()), ResultType(res) {} 1907 bool getSubClassData() const { return SubClassData; } 1908 unsigned getTypeQuals() const { return TypeQuals; } 1909public: 1910 1911 QualType getResultType() const { return ResultType; } 1912 1913 unsigned getRegParmType() const { return RegParm; } 1914 bool getNoReturnAttr() const { return NoReturn; } 1915 CallingConv getCallConv() const { return (CallingConv)CallConv; } 1916 ExtInfo getExtInfo() const { 1917 return ExtInfo(NoReturn, RegParm, (CallingConv)CallConv); 1918 } 1919 1920 /// \brief Determine the type of an expression that calls a function of 1921 /// this type. 1922 QualType getCallResultType(ASTContext &Context) const { 1923 return getResultType().getNonLValueExprType(Context); 1924 } 1925 1926 static llvm::StringRef getNameForCallConv(CallingConv CC); 1927 1928 static bool classof(const Type *T) { 1929 return T->getTypeClass() == FunctionNoProto || 1930 T->getTypeClass() == FunctionProto; 1931 } 1932 static bool classof(const FunctionType *) { return true; } 1933}; 1934 1935/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 1936/// no information available about its arguments. 1937class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 1938 FunctionNoProtoType(QualType Result, QualType Canonical, 1939 const ExtInfo &Info) 1940 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 1941 /*Dependent=*/false, Info) {} 1942 friend class ASTContext; // ASTContext creates these. 1943 1944protected: 1945 virtual Linkage getLinkageImpl() const; 1946 1947public: 1948 // No additional state past what FunctionType provides. 1949 1950 bool isSugared() const { return false; } 1951 QualType desugar() const { return QualType(this, 0); } 1952 1953 void Profile(llvm::FoldingSetNodeID &ID) { 1954 Profile(ID, getResultType(), getExtInfo()); 1955 } 1956 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 1957 const ExtInfo &Info) { 1958 ID.AddInteger(Info.getCC()); 1959 ID.AddInteger(Info.getRegParm()); 1960 ID.AddInteger(Info.getNoReturn()); 1961 ID.AddPointer(ResultType.getAsOpaquePtr()); 1962 } 1963 1964 static bool classof(const Type *T) { 1965 return T->getTypeClass() == FunctionNoProto; 1966 } 1967 static bool classof(const FunctionNoProtoType *) { return true; } 1968}; 1969 1970/// FunctionProtoType - Represents a prototype with argument type info, e.g. 1971/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 1972/// arguments, not as having a single void argument. Such a type can have an 1973/// exception specification, but this specification is not part of the canonical 1974/// type. 1975class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 1976 /// hasAnyDependentType - Determine whether there are any dependent 1977 /// types within the arguments passed in. 1978 static bool hasAnyDependentType(const QualType *ArgArray, unsigned numArgs) { 1979 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 1980 if (ArgArray[Idx]->isDependentType()) 1981 return true; 1982 1983 return false; 1984 } 1985 1986 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 1987 bool isVariadic, unsigned typeQuals, bool hasExs, 1988 bool hasAnyExs, const QualType *ExArray, 1989 unsigned numExs, QualType Canonical, 1990 const ExtInfo &Info) 1991 : FunctionType(FunctionProto, Result, isVariadic, typeQuals, Canonical, 1992 (Result->isDependentType() || 1993 hasAnyDependentType(ArgArray, numArgs)), 1994 Info), 1995 NumArgs(numArgs), NumExceptions(numExs), HasExceptionSpec(hasExs), 1996 AnyExceptionSpec(hasAnyExs) { 1997 // Fill in the trailing argument array. 1998 QualType *ArgInfo = reinterpret_cast<QualType*>(this+1); 1999 for (unsigned i = 0; i != numArgs; ++i) 2000 ArgInfo[i] = ArgArray[i]; 2001 // Fill in the exception array. 2002 QualType *Ex = ArgInfo + numArgs; 2003 for (unsigned i = 0; i != numExs; ++i) 2004 Ex[i] = ExArray[i]; 2005 } 2006 2007 /// NumArgs - The number of arguments this function has, not counting '...'. 2008 unsigned NumArgs : 20; 2009 2010 /// NumExceptions - The number of types in the exception spec, if any. 2011 unsigned NumExceptions : 10; 2012 2013 /// HasExceptionSpec - Whether this function has an exception spec at all. 2014 bool HasExceptionSpec : 1; 2015 2016 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 2017 bool AnyExceptionSpec : 1; 2018 2019 /// ArgInfo - There is an variable size array after the class in memory that 2020 /// holds the argument types. 2021 2022 /// Exceptions - There is another variable size array after ArgInfo that 2023 /// holds the exception types. 2024 2025 friend class ASTContext; // ASTContext creates these. 2026 2027protected: 2028 virtual Linkage getLinkageImpl() const; 2029 2030public: 2031 unsigned getNumArgs() const { return NumArgs; } 2032 QualType getArgType(unsigned i) const { 2033 assert(i < NumArgs && "Invalid argument number!"); 2034 return arg_type_begin()[i]; 2035 } 2036 2037 bool hasExceptionSpec() const { return HasExceptionSpec; } 2038 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 2039 unsigned getNumExceptions() const { return NumExceptions; } 2040 QualType getExceptionType(unsigned i) const { 2041 assert(i < NumExceptions && "Invalid exception number!"); 2042 return exception_begin()[i]; 2043 } 2044 bool hasEmptyExceptionSpec() const { 2045 return hasExceptionSpec() && !hasAnyExceptionSpec() && 2046 getNumExceptions() == 0; 2047 } 2048 2049 bool isVariadic() const { return getSubClassData(); } 2050 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2051 2052 typedef const QualType *arg_type_iterator; 2053 arg_type_iterator arg_type_begin() const { 2054 return reinterpret_cast<const QualType *>(this+1); 2055 } 2056 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2057 2058 typedef const QualType *exception_iterator; 2059 exception_iterator exception_begin() const { 2060 // exceptions begin where arguments end 2061 return arg_type_end(); 2062 } 2063 exception_iterator exception_end() const { 2064 return exception_begin() + NumExceptions; 2065 } 2066 2067 bool isSugared() const { return false; } 2068 QualType desugar() const { return QualType(this, 0); } 2069 2070 static bool classof(const Type *T) { 2071 return T->getTypeClass() == FunctionProto; 2072 } 2073 static bool classof(const FunctionProtoType *) { return true; } 2074 2075 void Profile(llvm::FoldingSetNodeID &ID); 2076 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2077 arg_type_iterator ArgTys, unsigned NumArgs, 2078 bool isVariadic, unsigned TypeQuals, 2079 bool hasExceptionSpec, bool anyExceptionSpec, 2080 unsigned NumExceptions, exception_iterator Exs, 2081 const ExtInfo &ExtInfo); 2082}; 2083 2084 2085/// \brief Represents the dependent type named by a dependently-scoped 2086/// typename using declaration, e.g. 2087/// using typename Base<T>::foo; 2088/// Template instantiation turns these into the underlying type. 2089class UnresolvedUsingType : public Type { 2090 UnresolvedUsingTypenameDecl *Decl; 2091 2092 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2093 : Type(UnresolvedUsing, QualType(), true), 2094 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2095 friend class ASTContext; // ASTContext creates these. 2096public: 2097 2098 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2099 2100 bool isSugared() const { return false; } 2101 QualType desugar() const { return QualType(this, 0); } 2102 2103 static bool classof(const Type *T) { 2104 return T->getTypeClass() == UnresolvedUsing; 2105 } 2106 static bool classof(const UnresolvedUsingType *) { return true; } 2107 2108 void Profile(llvm::FoldingSetNodeID &ID) { 2109 return Profile(ID, Decl); 2110 } 2111 static void Profile(llvm::FoldingSetNodeID &ID, 2112 UnresolvedUsingTypenameDecl *D) { 2113 ID.AddPointer(D); 2114 } 2115}; 2116 2117 2118class TypedefType : public Type { 2119 TypedefDecl *Decl; 2120protected: 2121 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2122 : Type(tc, can, can->isDependentType()), 2123 Decl(const_cast<TypedefDecl*>(D)) { 2124 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2125 } 2126 friend class ASTContext; // ASTContext creates these. 2127public: 2128 2129 TypedefDecl *getDecl() const { return Decl; } 2130 2131 /// LookThroughTypedefs - Return the ultimate type this typedef corresponds to 2132 /// potentially looking through *all* consecutive typedefs. This returns the 2133 /// sum of the type qualifiers, so if you have: 2134 /// typedef const int A; 2135 /// typedef volatile A B; 2136 /// looking through the typedefs for B will give you "const volatile A". 2137 QualType LookThroughTypedefs() const; 2138 2139 bool isSugared() const { return true; } 2140 QualType desugar() const; 2141 2142 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2143 static bool classof(const TypedefType *) { return true; } 2144}; 2145 2146/// TypeOfExprType (GCC extension). 2147class TypeOfExprType : public Type { 2148 Expr *TOExpr; 2149 2150protected: 2151 TypeOfExprType(Expr *E, QualType can = QualType()); 2152 friend class ASTContext; // ASTContext creates these. 2153public: 2154 Expr *getUnderlyingExpr() const { return TOExpr; } 2155 2156 /// \brief Remove a single level of sugar. 2157 QualType desugar() const; 2158 2159 /// \brief Returns whether this type directly provides sugar. 2160 bool isSugared() const { return true; } 2161 2162 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2163 static bool classof(const TypeOfExprType *) { return true; } 2164}; 2165 2166/// \brief Internal representation of canonical, dependent 2167/// typeof(expr) types. 2168/// 2169/// This class is used internally by the ASTContext to manage 2170/// canonical, dependent types, only. Clients will only see instances 2171/// of this class via TypeOfExprType nodes. 2172class DependentTypeOfExprType 2173 : public TypeOfExprType, public llvm::FoldingSetNode { 2174 ASTContext &Context; 2175 2176public: 2177 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2178 : TypeOfExprType(E), Context(Context) { } 2179 2180 bool isSugared() const { return false; } 2181 QualType desugar() const { return QualType(this, 0); } 2182 2183 void Profile(llvm::FoldingSetNodeID &ID) { 2184 Profile(ID, Context, getUnderlyingExpr()); 2185 } 2186 2187 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2188 Expr *E); 2189}; 2190 2191/// TypeOfType (GCC extension). 2192class TypeOfType : public Type { 2193 QualType TOType; 2194 TypeOfType(QualType T, QualType can) 2195 : Type(TypeOf, can, T->isDependentType()), TOType(T) { 2196 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2197 } 2198 friend class ASTContext; // ASTContext creates these. 2199public: 2200 QualType getUnderlyingType() const { return TOType; } 2201 2202 /// \brief Remove a single level of sugar. 2203 QualType desugar() const { return getUnderlyingType(); } 2204 2205 /// \brief Returns whether this type directly provides sugar. 2206 bool isSugared() const { return true; } 2207 2208 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2209 static bool classof(const TypeOfType *) { return true; } 2210}; 2211 2212/// DecltypeType (C++0x) 2213class DecltypeType : public Type { 2214 Expr *E; 2215 2216 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2217 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2218 // from it. 2219 QualType UnderlyingType; 2220 2221protected: 2222 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2223 friend class ASTContext; // ASTContext creates these. 2224public: 2225 Expr *getUnderlyingExpr() const { return E; } 2226 QualType getUnderlyingType() const { return UnderlyingType; } 2227 2228 /// \brief Remove a single level of sugar. 2229 QualType desugar() const { return getUnderlyingType(); } 2230 2231 /// \brief Returns whether this type directly provides sugar. 2232 bool isSugared() const { return !isDependentType(); } 2233 2234 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2235 static bool classof(const DecltypeType *) { return true; } 2236}; 2237 2238/// \brief Internal representation of canonical, dependent 2239/// decltype(expr) types. 2240/// 2241/// This class is used internally by the ASTContext to manage 2242/// canonical, dependent types, only. Clients will only see instances 2243/// of this class via DecltypeType nodes. 2244class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2245 ASTContext &Context; 2246 2247public: 2248 DependentDecltypeType(ASTContext &Context, Expr *E); 2249 2250 bool isSugared() const { return false; } 2251 QualType desugar() const { return QualType(this, 0); } 2252 2253 void Profile(llvm::FoldingSetNodeID &ID) { 2254 Profile(ID, Context, getUnderlyingExpr()); 2255 } 2256 2257 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2258 Expr *E); 2259}; 2260 2261class TagType : public Type { 2262 /// Stores the TagDecl associated with this type. The decl may point to any 2263 /// TagDecl that declares the entity. 2264 TagDecl * decl; 2265 2266protected: 2267 TagType(TypeClass TC, const TagDecl *D, QualType can); 2268 2269 virtual Linkage getLinkageImpl() const; 2270 2271public: 2272 TagDecl *getDecl() const; 2273 2274 /// @brief Determines whether this type is in the process of being 2275 /// defined. 2276 bool isBeingDefined() const; 2277 2278 static bool classof(const Type *T) { 2279 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2280 } 2281 static bool classof(const TagType *) { return true; } 2282 static bool classof(const RecordType *) { return true; } 2283 static bool classof(const EnumType *) { return true; } 2284}; 2285 2286/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2287/// to detect TagType objects of structs/unions/classes. 2288class RecordType : public TagType { 2289protected: 2290 explicit RecordType(const RecordDecl *D) 2291 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2292 explicit RecordType(TypeClass TC, RecordDecl *D) 2293 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2294 friend class ASTContext; // ASTContext creates these. 2295public: 2296 2297 RecordDecl *getDecl() const { 2298 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2299 } 2300 2301 // FIXME: This predicate is a helper to QualType/Type. It needs to 2302 // recursively check all fields for const-ness. If any field is declared 2303 // const, it needs to return false. 2304 bool hasConstFields() const { return false; } 2305 2306 // FIXME: RecordType needs to check when it is created that all fields are in 2307 // the same address space, and return that. 2308 unsigned getAddressSpace() const { return 0; } 2309 2310 bool isSugared() const { return false; } 2311 QualType desugar() const { return QualType(this, 0); } 2312 2313 static bool classof(const TagType *T); 2314 static bool classof(const Type *T) { 2315 return isa<TagType>(T) && classof(cast<TagType>(T)); 2316 } 2317 static bool classof(const RecordType *) { return true; } 2318}; 2319 2320/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2321/// to detect TagType objects of enums. 2322class EnumType : public TagType { 2323 explicit EnumType(const EnumDecl *D) 2324 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2325 friend class ASTContext; // ASTContext creates these. 2326public: 2327 2328 EnumDecl *getDecl() const { 2329 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2330 } 2331 2332 bool isSugared() const { return false; } 2333 QualType desugar() const { return QualType(this, 0); } 2334 2335 static bool classof(const TagType *T); 2336 static bool classof(const Type *T) { 2337 return isa<TagType>(T) && classof(cast<TagType>(T)); 2338 } 2339 static bool classof(const EnumType *) { return true; } 2340}; 2341 2342class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2343 unsigned Depth : 15; 2344 unsigned Index : 16; 2345 unsigned ParameterPack : 1; 2346 IdentifierInfo *Name; 2347 2348 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2349 QualType Canon) 2350 : Type(TemplateTypeParm, Canon, /*Dependent=*/true), 2351 Depth(D), Index(I), ParameterPack(PP), Name(N) { } 2352 2353 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2354 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true), 2355 Depth(D), Index(I), ParameterPack(PP), Name(0) { } 2356 2357 friend class ASTContext; // ASTContext creates these 2358 2359public: 2360 unsigned getDepth() const { return Depth; } 2361 unsigned getIndex() const { return Index; } 2362 bool isParameterPack() const { return ParameterPack; } 2363 IdentifierInfo *getName() const { return Name; } 2364 2365 bool isSugared() const { return false; } 2366 QualType desugar() const { return QualType(this, 0); } 2367 2368 void Profile(llvm::FoldingSetNodeID &ID) { 2369 Profile(ID, Depth, Index, ParameterPack, Name); 2370 } 2371 2372 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2373 unsigned Index, bool ParameterPack, 2374 IdentifierInfo *Name) { 2375 ID.AddInteger(Depth); 2376 ID.AddInteger(Index); 2377 ID.AddBoolean(ParameterPack); 2378 ID.AddPointer(Name); 2379 } 2380 2381 static bool classof(const Type *T) { 2382 return T->getTypeClass() == TemplateTypeParm; 2383 } 2384 static bool classof(const TemplateTypeParmType *T) { return true; } 2385}; 2386 2387/// \brief Represents the result of substituting a type for a template 2388/// type parameter. 2389/// 2390/// Within an instantiated template, all template type parameters have 2391/// been replaced with these. They are used solely to record that a 2392/// type was originally written as a template type parameter; 2393/// therefore they are never canonical. 2394class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2395 // The original type parameter. 2396 const TemplateTypeParmType *Replaced; 2397 2398 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2399 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType()), 2400 Replaced(Param) { } 2401 2402 friend class ASTContext; 2403 2404public: 2405 IdentifierInfo *getName() const { return Replaced->getName(); } 2406 2407 /// Gets the template parameter that was substituted for. 2408 const TemplateTypeParmType *getReplacedParameter() const { 2409 return Replaced; 2410 } 2411 2412 /// Gets the type that was substituted for the template 2413 /// parameter. 2414 QualType getReplacementType() const { 2415 return getCanonicalTypeInternal(); 2416 } 2417 2418 bool isSugared() const { return true; } 2419 QualType desugar() const { return getReplacementType(); } 2420 2421 void Profile(llvm::FoldingSetNodeID &ID) { 2422 Profile(ID, getReplacedParameter(), getReplacementType()); 2423 } 2424 static void Profile(llvm::FoldingSetNodeID &ID, 2425 const TemplateTypeParmType *Replaced, 2426 QualType Replacement) { 2427 ID.AddPointer(Replaced); 2428 ID.AddPointer(Replacement.getAsOpaquePtr()); 2429 } 2430 2431 static bool classof(const Type *T) { 2432 return T->getTypeClass() == SubstTemplateTypeParm; 2433 } 2434 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2435}; 2436 2437/// \brief Represents the type of a template specialization as written 2438/// in the source code. 2439/// 2440/// Template specialization types represent the syntactic form of a 2441/// template-id that refers to a type, e.g., @c vector<int>. Some 2442/// template specialization types are syntactic sugar, whose canonical 2443/// type will point to some other type node that represents the 2444/// instantiation or class template specialization. For example, a 2445/// class template specialization type of @c vector<int> will refer to 2446/// a tag type for the instantiation 2447/// @c std::vector<int, std::allocator<int>>. 2448/// 2449/// Other template specialization types, for which the template name 2450/// is dependent, may be canonical types. These types are always 2451/// dependent. 2452class TemplateSpecializationType 2453 : public Type, public llvm::FoldingSetNode { 2454 /// \brief The name of the template being specialized. 2455 TemplateName Template; 2456 2457 /// \brief - The number of template arguments named in this class 2458 /// template specialization. 2459 unsigned NumArgs; 2460 2461 TemplateSpecializationType(TemplateName T, 2462 const TemplateArgument *Args, 2463 unsigned NumArgs, QualType Canon); 2464 2465 friend class ASTContext; // ASTContext creates these 2466 2467public: 2468 /// \brief Determine whether any of the given template arguments are 2469 /// dependent. 2470 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2471 unsigned NumArgs); 2472 2473 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2474 unsigned NumArgs); 2475 2476 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2477 2478 /// \brief Print a template argument list, including the '<' and '>' 2479 /// enclosing the template arguments. 2480 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2481 unsigned NumArgs, 2482 const PrintingPolicy &Policy); 2483 2484 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2485 unsigned NumArgs, 2486 const PrintingPolicy &Policy); 2487 2488 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2489 const PrintingPolicy &Policy); 2490 2491 /// True if this template specialization type matches a current 2492 /// instantiation in the context in which it is found. 2493 bool isCurrentInstantiation() const { 2494 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 2495 } 2496 2497 typedef const TemplateArgument * iterator; 2498 2499 iterator begin() const { return getArgs(); } 2500 iterator end() const; // defined inline in TemplateBase.h 2501 2502 /// \brief Retrieve the name of the template that we are specializing. 2503 TemplateName getTemplateName() const { return Template; } 2504 2505 /// \brief Retrieve the template arguments. 2506 const TemplateArgument *getArgs() const { 2507 return reinterpret_cast<const TemplateArgument *>(this + 1); 2508 } 2509 2510 /// \brief Retrieve the number of template arguments. 2511 unsigned getNumArgs() const { return NumArgs; } 2512 2513 /// \brief Retrieve a specific template argument as a type. 2514 /// \precondition @c isArgType(Arg) 2515 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2516 2517 bool isSugared() const { 2518 return !isDependentType() || isCurrentInstantiation(); 2519 } 2520 QualType desugar() const { return getCanonicalTypeInternal(); } 2521 2522 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Ctx) { 2523 Profile(ID, Template, getArgs(), NumArgs, Ctx); 2524 } 2525 2526 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2527 const TemplateArgument *Args, 2528 unsigned NumArgs, 2529 ASTContext &Context); 2530 2531 static bool classof(const Type *T) { 2532 return T->getTypeClass() == TemplateSpecialization; 2533 } 2534 static bool classof(const TemplateSpecializationType *T) { return true; } 2535}; 2536 2537/// \brief The injected class name of a C++ class template or class 2538/// template partial specialization. Used to record that a type was 2539/// spelled with a bare identifier rather than as a template-id; the 2540/// equivalent for non-templated classes is just RecordType. 2541/// 2542/// Injected class name types are always dependent. Template 2543/// instantiation turns these into RecordTypes. 2544/// 2545/// Injected class name types are always canonical. This works 2546/// because it is impossible to compare an injected class name type 2547/// with the corresponding non-injected template type, for the same 2548/// reason that it is impossible to directly compare template 2549/// parameters from different dependent contexts: injected class name 2550/// types can only occur within the scope of a particular templated 2551/// declaration, and within that scope every template specialization 2552/// will canonicalize to the injected class name (when appropriate 2553/// according to the rules of the language). 2554class InjectedClassNameType : public Type { 2555 CXXRecordDecl *Decl; 2556 2557 /// The template specialization which this type represents. 2558 /// For example, in 2559 /// template <class T> class A { ... }; 2560 /// this is A<T>, whereas in 2561 /// template <class X, class Y> class A<B<X,Y> > { ... }; 2562 /// this is A<B<X,Y> >. 2563 /// 2564 /// It is always unqualified, always a template specialization type, 2565 /// and always dependent. 2566 QualType InjectedType; 2567 2568 friend class ASTContext; // ASTContext creates these. 2569 friend class PCHReader; // FIXME: ASTContext::getInjectedClassNameType is not 2570 // currently suitable for PCH reading, too much 2571 // interdependencies. 2572 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 2573 : Type(InjectedClassName, QualType(), true), 2574 Decl(D), InjectedType(TST) { 2575 assert(isa<TemplateSpecializationType>(TST)); 2576 assert(!TST.hasQualifiers()); 2577 assert(TST->isDependentType()); 2578 } 2579 2580public: 2581 QualType getInjectedSpecializationType() const { return InjectedType; } 2582 const TemplateSpecializationType *getInjectedTST() const { 2583 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 2584 } 2585 2586 CXXRecordDecl *getDecl() const; 2587 2588 bool isSugared() const { return false; } 2589 QualType desugar() const { return QualType(this, 0); } 2590 2591 static bool classof(const Type *T) { 2592 return T->getTypeClass() == InjectedClassName; 2593 } 2594 static bool classof(const InjectedClassNameType *T) { return true; } 2595}; 2596 2597/// \brief The kind of a tag type. 2598enum TagTypeKind { 2599 /// \brief The "struct" keyword. 2600 TTK_Struct, 2601 /// \brief The "union" keyword. 2602 TTK_Union, 2603 /// \brief The "class" keyword. 2604 TTK_Class, 2605 /// \brief The "enum" keyword. 2606 TTK_Enum 2607}; 2608 2609/// \brief The elaboration keyword that precedes a qualified type name or 2610/// introduces an elaborated-type-specifier. 2611enum ElaboratedTypeKeyword { 2612 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 2613 ETK_Struct, 2614 /// \brief The "union" keyword introduces the elaborated-type-specifier. 2615 ETK_Union, 2616 /// \brief The "class" keyword introduces the elaborated-type-specifier. 2617 ETK_Class, 2618 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 2619 ETK_Enum, 2620 /// \brief The "typename" keyword precedes the qualified type name, e.g., 2621 /// \c typename T::type. 2622 ETK_Typename, 2623 /// \brief No keyword precedes the qualified type name. 2624 ETK_None 2625}; 2626 2627/// A helper class for Type nodes having an ElaboratedTypeKeyword. 2628/// The keyword in stored in the free bits of the base class. 2629/// Also provides a few static helpers for converting and printing 2630/// elaborated type keyword and tag type kind enumerations. 2631class TypeWithKeyword : public Type { 2632 /// Keyword - Encodes an ElaboratedTypeKeyword enumeration constant. 2633 unsigned Keyword : 3; 2634 2635protected: 2636 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 2637 QualType Canonical, bool dependent) 2638 : Type(tc, Canonical, dependent), Keyword(Keyword) {} 2639 2640public: 2641 virtual ~TypeWithKeyword(); // pin vtable to Type.cpp 2642 2643 ElaboratedTypeKeyword getKeyword() const { 2644 return static_cast<ElaboratedTypeKeyword>(Keyword); 2645 } 2646 2647 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 2648 /// into an elaborated type keyword. 2649 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 2650 2651 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 2652 /// into a tag type kind. It is an error to provide a type specifier 2653 /// which *isn't* a tag kind here. 2654 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 2655 2656 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 2657 /// elaborated type keyword. 2658 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 2659 2660 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 2661 // a TagTypeKind. It is an error to provide an elaborated type keyword 2662 /// which *isn't* a tag kind here. 2663 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 2664 2665 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 2666 2667 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 2668 2669 static const char *getTagTypeKindName(TagTypeKind Kind) { 2670 return getKeywordName(getKeywordForTagTypeKind(Kind)); 2671 } 2672 2673 class CannotCastToThisType {}; 2674 static CannotCastToThisType classof(const Type *); 2675}; 2676 2677/// \brief Represents a type that was referred to using an elaborated type 2678/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 2679/// or both. 2680/// 2681/// This type is used to keep track of a type name as written in the 2682/// source code, including tag keywords and any nested-name-specifiers. 2683/// The type itself is always "sugar", used to express what was written 2684/// in the source code but containing no additional semantic information. 2685class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 2686 2687 /// \brief The nested name specifier containing the qualifier. 2688 NestedNameSpecifier *NNS; 2689 2690 /// \brief The type that this qualified name refers to. 2691 QualType NamedType; 2692 2693 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2694 QualType NamedType, QualType CanonType) 2695 : TypeWithKeyword(Keyword, Elaborated, CanonType, 2696 NamedType->isDependentType()), 2697 NNS(NNS), NamedType(NamedType) { 2698 assert(!(Keyword == ETK_None && NNS == 0) && 2699 "ElaboratedType cannot have elaborated type keyword " 2700 "and name qualifier both null."); 2701 } 2702 2703 friend class ASTContext; // ASTContext creates these 2704 2705public: 2706 ~ElaboratedType(); 2707 2708 /// \brief Retrieve the qualification on this type. 2709 NestedNameSpecifier *getQualifier() const { return NNS; } 2710 2711 /// \brief Retrieve the type named by the qualified-id. 2712 QualType getNamedType() const { return NamedType; } 2713 2714 /// \brief Remove a single level of sugar. 2715 QualType desugar() const { return getNamedType(); } 2716 2717 /// \brief Returns whether this type directly provides sugar. 2718 bool isSugared() const { return true; } 2719 2720 void Profile(llvm::FoldingSetNodeID &ID) { 2721 Profile(ID, getKeyword(), NNS, NamedType); 2722 } 2723 2724 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2725 NestedNameSpecifier *NNS, QualType NamedType) { 2726 ID.AddInteger(Keyword); 2727 ID.AddPointer(NNS); 2728 NamedType.Profile(ID); 2729 } 2730 2731 static bool classof(const Type *T) { 2732 return T->getTypeClass() == Elaborated; 2733 } 2734 static bool classof(const ElaboratedType *T) { return true; } 2735}; 2736 2737/// \brief Represents a qualified type name for which the type name is 2738/// dependent. 2739/// 2740/// DependentNameType represents a class of dependent types that involve a 2741/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 2742/// name of a type. The DependentNameType may start with a "typename" (for a 2743/// typename-specifier), "class", "struct", "union", or "enum" (for a 2744/// dependent elaborated-type-specifier), or nothing (in contexts where we 2745/// know that we must be referring to a type, e.g., in a base class specifier). 2746class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 2747 2748 /// \brief The nested name specifier containing the qualifier. 2749 NestedNameSpecifier *NNS; 2750 2751 /// \brief The type that this typename specifier refers to. 2752 const IdentifierInfo *Name; 2753 2754 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2755 const IdentifierInfo *Name, QualType CanonType) 2756 : TypeWithKeyword(Keyword, DependentName, CanonType, true), 2757 NNS(NNS), Name(Name) { 2758 assert(NNS->isDependent() && 2759 "DependentNameType requires a dependent nested-name-specifier"); 2760 } 2761 2762 friend class ASTContext; // ASTContext creates these 2763 2764public: 2765 virtual ~DependentNameType(); 2766 2767 /// \brief Retrieve the qualification on this type. 2768 NestedNameSpecifier *getQualifier() const { return NNS; } 2769 2770 /// \brief Retrieve the type named by the typename specifier as an 2771 /// identifier. 2772 /// 2773 /// This routine will return a non-NULL identifier pointer when the 2774 /// form of the original typename was terminated by an identifier, 2775 /// e.g., "typename T::type". 2776 const IdentifierInfo *getIdentifier() const { 2777 return Name; 2778 } 2779 2780 bool isSugared() const { return false; } 2781 QualType desugar() const { return QualType(this, 0); } 2782 2783 void Profile(llvm::FoldingSetNodeID &ID) { 2784 Profile(ID, getKeyword(), NNS, Name); 2785 } 2786 2787 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2788 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 2789 ID.AddInteger(Keyword); 2790 ID.AddPointer(NNS); 2791 ID.AddPointer(Name); 2792 } 2793 2794 static bool classof(const Type *T) { 2795 return T->getTypeClass() == DependentName; 2796 } 2797 static bool classof(const DependentNameType *T) { return true; } 2798}; 2799 2800/// DependentTemplateSpecializationType - Represents a template 2801/// specialization type whose template cannot be resolved, e.g. 2802/// A<T>::template B<T> 2803class DependentTemplateSpecializationType : 2804 public TypeWithKeyword, public llvm::FoldingSetNode { 2805 2806 /// \brief The nested name specifier containing the qualifier. 2807 NestedNameSpecifier *NNS; 2808 2809 /// \brief The identifier of the template. 2810 const IdentifierInfo *Name; 2811 2812 /// \brief - The number of template arguments named in this class 2813 /// template specialization. 2814 unsigned NumArgs; 2815 2816 const TemplateArgument *getArgBuffer() const { 2817 return reinterpret_cast<const TemplateArgument*>(this+1); 2818 } 2819 TemplateArgument *getArgBuffer() { 2820 return reinterpret_cast<TemplateArgument*>(this+1); 2821 } 2822 2823 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 2824 NestedNameSpecifier *NNS, 2825 const IdentifierInfo *Name, 2826 unsigned NumArgs, 2827 const TemplateArgument *Args, 2828 QualType Canon); 2829 2830 friend class ASTContext; // ASTContext creates these 2831 2832public: 2833 virtual ~DependentTemplateSpecializationType(); 2834 2835 NestedNameSpecifier *getQualifier() const { return NNS; } 2836 const IdentifierInfo *getIdentifier() const { return Name; } 2837 2838 /// \brief Retrieve the template arguments. 2839 const TemplateArgument *getArgs() const { 2840 return getArgBuffer(); 2841 } 2842 2843 /// \brief Retrieve the number of template arguments. 2844 unsigned getNumArgs() const { return NumArgs; } 2845 2846 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2847 2848 typedef const TemplateArgument * iterator; 2849 iterator begin() const { return getArgs(); } 2850 iterator end() const; // inline in TemplateBase.h 2851 2852 bool isSugared() const { return false; } 2853 QualType desugar() const { return QualType(this, 0); } 2854 2855 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context) { 2856 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 2857 } 2858 2859 static void Profile(llvm::FoldingSetNodeID &ID, 2860 ASTContext &Context, 2861 ElaboratedTypeKeyword Keyword, 2862 NestedNameSpecifier *Qualifier, 2863 const IdentifierInfo *Name, 2864 unsigned NumArgs, 2865 const TemplateArgument *Args); 2866 2867 static bool classof(const Type *T) { 2868 return T->getTypeClass() == DependentTemplateSpecialization; 2869 } 2870 static bool classof(const DependentTemplateSpecializationType *T) { 2871 return true; 2872 } 2873}; 2874 2875/// ObjCObjectType - Represents a class type in Objective C. 2876/// Every Objective C type is a combination of a base type and a 2877/// list of protocols. 2878/// 2879/// Given the following declarations: 2880/// @class C; 2881/// @protocol P; 2882/// 2883/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 2884/// with base C and no protocols. 2885/// 2886/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 2887/// 2888/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 2889/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 2890/// and no protocols. 2891/// 2892/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 2893/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 2894/// this should get its own sugar class to better represent the source. 2895class ObjCObjectType : public Type { 2896 // Pad the bit count up so that NumProtocols is 2-byte aligned 2897 unsigned : BitsRemainingInType - 16; 2898 2899 /// \brief The number of protocols stored after the 2900 /// ObjCObjectPointerType node. 2901 /// 2902 /// These protocols are those written directly on the type. If 2903 /// protocol qualifiers ever become additive, the iterators will 2904 /// get kindof complicated. 2905 /// 2906 /// In the canonical object type, these are sorted alphabetically 2907 /// and uniqued. 2908 unsigned NumProtocols : 16; 2909 2910 /// Either a BuiltinType or an InterfaceType or sugar for either. 2911 QualType BaseType; 2912 2913 ObjCProtocolDecl * const *getProtocolStorage() const { 2914 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 2915 } 2916 2917 ObjCProtocolDecl **getProtocolStorage(); 2918 2919protected: 2920 ObjCObjectType(QualType Canonical, QualType Base, 2921 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 2922 2923 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 2924 ObjCObjectType(enum Nonce_ObjCInterface) 2925 : Type(ObjCInterface, QualType(), false), 2926 NumProtocols(0), 2927 BaseType(QualType(this_(), 0)) {} 2928 2929protected: 2930 Linkage getLinkageImpl() const; // key function 2931 2932public: 2933 /// getBaseType - Gets the base type of this object type. This is 2934 /// always (possibly sugar for) one of: 2935 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 2936 /// user, which is a typedef for an ObjCPointerType) 2937 /// - the 'Class' builtin type (same caveat) 2938 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 2939 QualType getBaseType() const { return BaseType; } 2940 2941 bool isObjCId() const { 2942 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 2943 } 2944 bool isObjCClass() const { 2945 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 2946 } 2947 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 2948 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 2949 bool isObjCUnqualifiedIdOrClass() const { 2950 if (!qual_empty()) return false; 2951 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 2952 return T->getKind() == BuiltinType::ObjCId || 2953 T->getKind() == BuiltinType::ObjCClass; 2954 return false; 2955 } 2956 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 2957 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 2958 2959 /// Gets the interface declaration for this object type, if the base type 2960 /// really is an interface. 2961 ObjCInterfaceDecl *getInterface() const; 2962 2963 typedef ObjCProtocolDecl * const *qual_iterator; 2964 2965 qual_iterator qual_begin() const { return getProtocolStorage(); } 2966 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 2967 2968 bool qual_empty() const { return getNumProtocols() == 0; } 2969 2970 /// getNumProtocols - Return the number of qualifying protocols in this 2971 /// interface type, or 0 if there are none. 2972 unsigned getNumProtocols() const { return NumProtocols; } 2973 2974 /// \brief Fetch a protocol by index. 2975 ObjCProtocolDecl *getProtocol(unsigned I) const { 2976 assert(I < getNumProtocols() && "Out-of-range protocol access"); 2977 return qual_begin()[I]; 2978 } 2979 2980 bool isSugared() const { return false; } 2981 QualType desugar() const { return QualType(this, 0); } 2982 2983 static bool classof(const Type *T) { 2984 return T->getTypeClass() == ObjCObject || 2985 T->getTypeClass() == ObjCInterface; 2986 } 2987 static bool classof(const ObjCObjectType *) { return true; } 2988}; 2989 2990/// ObjCObjectTypeImpl - A class providing a concrete implementation 2991/// of ObjCObjectType, so as to not increase the footprint of 2992/// ObjCInterfaceType. Code outside of ASTContext and the core type 2993/// system should not reference this type. 2994class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 2995 friend class ASTContext; 2996 2997 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 2998 // will need to be modified. 2999 3000 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3001 ObjCProtocolDecl * const *Protocols, 3002 unsigned NumProtocols) 3003 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3004 3005public: 3006 void Profile(llvm::FoldingSetNodeID &ID); 3007 static void Profile(llvm::FoldingSetNodeID &ID, 3008 QualType Base, 3009 ObjCProtocolDecl *const *protocols, 3010 unsigned NumProtocols); 3011}; 3012 3013inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3014 return reinterpret_cast<ObjCProtocolDecl**>( 3015 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3016} 3017 3018/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3019/// object oriented design. They basically correspond to C++ classes. There 3020/// are two kinds of interface types, normal interfaces like "NSString" and 3021/// qualified interfaces, which are qualified with a protocol list like 3022/// "NSString<NSCopyable, NSAmazing>". 3023/// 3024/// ObjCInterfaceType guarantees the following properties when considered 3025/// as a subtype of its superclass, ObjCObjectType: 3026/// - There are no protocol qualifiers. To reinforce this, code which 3027/// tries to invoke the protocol methods via an ObjCInterfaceType will 3028/// fail to compile. 3029/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3030/// T->getBaseType() == QualType(T, 0). 3031class ObjCInterfaceType : public ObjCObjectType { 3032 ObjCInterfaceDecl *Decl; 3033 3034 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3035 : ObjCObjectType(Nonce_ObjCInterface), 3036 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3037 friend class ASTContext; // ASTContext creates these. 3038public: 3039 /// getDecl - Get the declaration of this interface. 3040 ObjCInterfaceDecl *getDecl() const { return Decl; } 3041 3042 bool isSugared() const { return false; } 3043 QualType desugar() const { return QualType(this, 0); } 3044 3045 static bool classof(const Type *T) { 3046 return T->getTypeClass() == ObjCInterface; 3047 } 3048 static bool classof(const ObjCInterfaceType *) { return true; } 3049 3050 // Nonsense to "hide" certain members of ObjCObjectType within this 3051 // class. People asking for protocols on an ObjCInterfaceType are 3052 // not going to get what they want: ObjCInterfaceTypes are 3053 // guaranteed to have no protocols. 3054 enum { 3055 qual_iterator, 3056 qual_begin, 3057 qual_end, 3058 getNumProtocols, 3059 getProtocol 3060 }; 3061}; 3062 3063inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3064 if (const ObjCInterfaceType *T = 3065 getBaseType()->getAs<ObjCInterfaceType>()) 3066 return T->getDecl(); 3067 return 0; 3068} 3069 3070/// ObjCObjectPointerType - Used to represent a pointer to an 3071/// Objective C object. These are constructed from pointer 3072/// declarators when the pointee type is an ObjCObjectType (or sugar 3073/// for one). In addition, the 'id' and 'Class' types are typedefs 3074/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3075/// are translated into these. 3076/// 3077/// Pointers to pointers to Objective C objects are still PointerTypes; 3078/// only the first level of pointer gets it own type implementation. 3079class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3080 QualType PointeeType; 3081 3082 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3083 : Type(ObjCObjectPointer, Canonical, false), 3084 PointeeType(Pointee) {} 3085 friend class ASTContext; // ASTContext creates these. 3086 3087protected: 3088 virtual Linkage getLinkageImpl() const; 3089 3090public: 3091 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3092 /// The result will always be an ObjCObjectType or sugar thereof. 3093 QualType getPointeeType() const { return PointeeType; } 3094 3095 /// getObjCObjectType - Gets the type pointed to by this ObjC 3096 /// pointer. This method always returns non-null. 3097 /// 3098 /// This method is equivalent to getPointeeType() except that 3099 /// it discards any typedefs (or other sugar) between this 3100 /// type and the "outermost" object type. So for: 3101 /// @class A; @protocol P; @protocol Q; 3102 /// typedef A<P> AP; 3103 /// typedef A A1; 3104 /// typedef A1<P> A1P; 3105 /// typedef A1P<Q> A1PQ; 3106 /// For 'A*', getObjectType() will return 'A'. 3107 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3108 /// For 'AP*', getObjectType() will return 'A<P>'. 3109 /// For 'A1*', getObjectType() will return 'A'. 3110 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3111 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3112 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3113 /// adding protocols to a protocol-qualified base discards the 3114 /// old qualifiers (for now). But if it didn't, getObjectType() 3115 /// would return 'A1P<Q>' (and we'd have to make iterating over 3116 /// qualifiers more complicated). 3117 const ObjCObjectType *getObjectType() const { 3118 return PointeeType->getAs<ObjCObjectType>(); 3119 } 3120 3121 /// getInterfaceType - If this pointer points to an Objective C 3122 /// @interface type, gets the type for that interface. Any protocol 3123 /// qualifiers on the interface are ignored. 3124 /// 3125 /// \return null if the base type for this pointer is 'id' or 'Class' 3126 const ObjCInterfaceType *getInterfaceType() const { 3127 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3128 } 3129 3130 /// getInterfaceDecl - If this pointer points to an Objective @interface 3131 /// type, gets the declaration for that interface. 3132 /// 3133 /// \return null if the base type for this pointer is 'id' or 'Class' 3134 ObjCInterfaceDecl *getInterfaceDecl() const { 3135 return getObjectType()->getInterface(); 3136 } 3137 3138 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3139 /// its object type is the primitive 'id' type with no protocols. 3140 bool isObjCIdType() const { 3141 return getObjectType()->isObjCUnqualifiedId(); 3142 } 3143 3144 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3145 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3146 bool isObjCClassType() const { 3147 return getObjectType()->isObjCUnqualifiedClass(); 3148 } 3149 3150 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3151 /// non-empty set of protocols. 3152 bool isObjCQualifiedIdType() const { 3153 return getObjectType()->isObjCQualifiedId(); 3154 } 3155 3156 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3157 /// some non-empty set of protocols. 3158 bool isObjCQualifiedClassType() const { 3159 return getObjectType()->isObjCQualifiedClass(); 3160 } 3161 3162 /// An iterator over the qualifiers on the object type. Provided 3163 /// for convenience. This will always iterate over the full set of 3164 /// protocols on a type, not just those provided directly. 3165 typedef ObjCObjectType::qual_iterator qual_iterator; 3166 3167 qual_iterator qual_begin() const { 3168 return getObjectType()->qual_begin(); 3169 } 3170 qual_iterator qual_end() const { 3171 return getObjectType()->qual_end(); 3172 } 3173 bool qual_empty() const { return getObjectType()->qual_empty(); } 3174 3175 /// getNumProtocols - Return the number of qualifying protocols on 3176 /// the object type. 3177 unsigned getNumProtocols() const { 3178 return getObjectType()->getNumProtocols(); 3179 } 3180 3181 /// \brief Retrieve a qualifying protocol by index on the object 3182 /// type. 3183 ObjCProtocolDecl *getProtocol(unsigned I) const { 3184 return getObjectType()->getProtocol(I); 3185 } 3186 3187 bool isSugared() const { return false; } 3188 QualType desugar() const { return QualType(this, 0); } 3189 3190 void Profile(llvm::FoldingSetNodeID &ID) { 3191 Profile(ID, getPointeeType()); 3192 } 3193 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3194 ID.AddPointer(T.getAsOpaquePtr()); 3195 } 3196 static bool classof(const Type *T) { 3197 return T->getTypeClass() == ObjCObjectPointer; 3198 } 3199 static bool classof(const ObjCObjectPointerType *) { return true; } 3200}; 3201 3202/// A qualifier set is used to build a set of qualifiers. 3203class QualifierCollector : public Qualifiers { 3204 ASTContext *Context; 3205 3206public: 3207 QualifierCollector(Qualifiers Qs = Qualifiers()) 3208 : Qualifiers(Qs), Context(0) {} 3209 QualifierCollector(ASTContext &Context, Qualifiers Qs = Qualifiers()) 3210 : Qualifiers(Qs), Context(&Context) {} 3211 3212 void setContext(ASTContext &C) { Context = &C; } 3213 3214 /// Collect any qualifiers on the given type and return an 3215 /// unqualified type. 3216 const Type *strip(QualType QT) { 3217 addFastQualifiers(QT.getLocalFastQualifiers()); 3218 if (QT.hasLocalNonFastQualifiers()) { 3219 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 3220 Context = &EQ->getContext(); 3221 addQualifiers(EQ->getQualifiers()); 3222 return EQ->getBaseType(); 3223 } 3224 return QT.getTypePtrUnsafe(); 3225 } 3226 3227 /// Apply the collected qualifiers to the given type. 3228 QualType apply(QualType QT) const; 3229 3230 /// Apply the collected qualifiers to the given type. 3231 QualType apply(const Type* T) const; 3232 3233}; 3234 3235 3236// Inline function definitions. 3237 3238inline bool QualType::isCanonical() const { 3239 const Type *T = getTypePtr(); 3240 if (hasLocalQualifiers()) 3241 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 3242 return T->isCanonicalUnqualified(); 3243} 3244 3245inline bool QualType::isCanonicalAsParam() const { 3246 if (hasLocalQualifiers()) return false; 3247 const Type *T = getTypePtr(); 3248 return T->isCanonicalUnqualified() && 3249 !isa<FunctionType>(T) && !isa<ArrayType>(T); 3250} 3251 3252inline bool QualType::isConstQualified() const { 3253 return isLocalConstQualified() || 3254 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 3255} 3256 3257inline bool QualType::isRestrictQualified() const { 3258 return isLocalRestrictQualified() || 3259 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 3260} 3261 3262 3263inline bool QualType::isVolatileQualified() const { 3264 return isLocalVolatileQualified() || 3265 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 3266} 3267 3268inline bool QualType::hasQualifiers() const { 3269 return hasLocalQualifiers() || 3270 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 3271} 3272 3273inline Qualifiers QualType::getQualifiers() const { 3274 Qualifiers Quals = getLocalQualifiers(); 3275 Quals.addQualifiers( 3276 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 3277 return Quals; 3278} 3279 3280inline unsigned QualType::getCVRQualifiers() const { 3281 return getLocalCVRQualifiers() | 3282 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 3283} 3284 3285/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 3286/// type, returns them. Otherwise, if this is an array type, recurses 3287/// on the element type until some qualifiers have been found or a non-array 3288/// type reached. 3289inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 3290 if (unsigned Quals = getCVRQualifiers()) 3291 return Quals; 3292 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3293 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3294 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 3295 return 0; 3296} 3297 3298inline void QualType::removeConst() { 3299 removeFastQualifiers(Qualifiers::Const); 3300} 3301 3302inline void QualType::removeRestrict() { 3303 removeFastQualifiers(Qualifiers::Restrict); 3304} 3305 3306inline void QualType::removeVolatile() { 3307 QualifierCollector Qc; 3308 const Type *Ty = Qc.strip(*this); 3309 if (Qc.hasVolatile()) { 3310 Qc.removeVolatile(); 3311 *this = Qc.apply(Ty); 3312 } 3313} 3314 3315inline void QualType::removeCVRQualifiers(unsigned Mask) { 3316 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 3317 3318 // Fast path: we don't need to touch the slow qualifiers. 3319 if (!(Mask & ~Qualifiers::FastMask)) { 3320 removeFastQualifiers(Mask); 3321 return; 3322 } 3323 3324 QualifierCollector Qc; 3325 const Type *Ty = Qc.strip(*this); 3326 Qc.removeCVRQualifiers(Mask); 3327 *this = Qc.apply(Ty); 3328} 3329 3330/// getAddressSpace - Return the address space of this type. 3331inline unsigned QualType::getAddressSpace() const { 3332 if (hasLocalNonFastQualifiers()) { 3333 const ExtQuals *EQ = getExtQualsUnsafe(); 3334 if (EQ->hasAddressSpace()) 3335 return EQ->getAddressSpace(); 3336 } 3337 3338 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3339 if (CT.hasLocalNonFastQualifiers()) { 3340 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3341 if (EQ->hasAddressSpace()) 3342 return EQ->getAddressSpace(); 3343 } 3344 3345 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3346 return AT->getElementType().getAddressSpace(); 3347 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 3348 return RT->getAddressSpace(); 3349 return 0; 3350} 3351 3352/// getObjCGCAttr - Return the gc attribute of this type. 3353inline Qualifiers::GC QualType::getObjCGCAttr() const { 3354 if (hasLocalNonFastQualifiers()) { 3355 const ExtQuals *EQ = getExtQualsUnsafe(); 3356 if (EQ->hasObjCGCAttr()) 3357 return EQ->getObjCGCAttr(); 3358 } 3359 3360 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3361 if (CT.hasLocalNonFastQualifiers()) { 3362 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3363 if (EQ->hasObjCGCAttr()) 3364 return EQ->getObjCGCAttr(); 3365 } 3366 3367 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3368 return AT->getElementType().getObjCGCAttr(); 3369 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3370 return PT->getPointeeType().getObjCGCAttr(); 3371 // We most look at all pointer types, not just pointer to interface types. 3372 if (const PointerType *PT = CT->getAs<PointerType>()) 3373 return PT->getPointeeType().getObjCGCAttr(); 3374 return Qualifiers::GCNone; 3375} 3376 3377inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3378 if (const PointerType *PT = t.getAs<PointerType>()) { 3379 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3380 return FT->getExtInfo(); 3381 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3382 return FT->getExtInfo(); 3383 3384 return FunctionType::ExtInfo(); 3385} 3386 3387inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3388 return getFunctionExtInfo(*t); 3389} 3390 3391/// \brief Determine whether this set of qualifiers is a superset of the given 3392/// set of qualifiers. 3393inline bool Qualifiers::isSupersetOf(Qualifiers Other) const { 3394 return Mask != Other.Mask && (Mask | Other.Mask) == Mask; 3395} 3396 3397/// isMoreQualifiedThan - Determine whether this type is more 3398/// qualified than the Other type. For example, "const volatile int" 3399/// is more qualified than "const int", "volatile int", and 3400/// "int". However, it is not more qualified than "const volatile 3401/// int". 3402inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3403 // FIXME: work on arbitrary qualifiers 3404 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3405 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3406 if (getAddressSpace() != Other.getAddressSpace()) 3407 return false; 3408 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3409} 3410 3411/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3412/// as qualified as the Other type. For example, "const volatile 3413/// int" is at least as qualified as "const int", "volatile int", 3414/// "int", and "const volatile int". 3415inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3416 // FIXME: work on arbitrary qualifiers 3417 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3418 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3419 if (getAddressSpace() != Other.getAddressSpace()) 3420 return false; 3421 return (MyQuals | OtherQuals) == MyQuals; 3422} 3423 3424/// getNonReferenceType - If Type is a reference type (e.g., const 3425/// int&), returns the type that the reference refers to ("const 3426/// int"). Otherwise, returns the type itself. This routine is used 3427/// throughout Sema to implement C++ 5p6: 3428/// 3429/// If an expression initially has the type "reference to T" (8.3.2, 3430/// 8.5.3), the type is adjusted to "T" prior to any further 3431/// analysis, the expression designates the object or function 3432/// denoted by the reference, and the expression is an lvalue. 3433inline QualType QualType::getNonReferenceType() const { 3434 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3435 return RefType->getPointeeType(); 3436 else 3437 return *this; 3438} 3439 3440inline bool Type::isFunctionType() const { 3441 return isa<FunctionType>(CanonicalType); 3442} 3443inline bool Type::isPointerType() const { 3444 return isa<PointerType>(CanonicalType); 3445} 3446inline bool Type::isAnyPointerType() const { 3447 return isPointerType() || isObjCObjectPointerType(); 3448} 3449inline bool Type::isBlockPointerType() const { 3450 return isa<BlockPointerType>(CanonicalType); 3451} 3452inline bool Type::isReferenceType() const { 3453 return isa<ReferenceType>(CanonicalType); 3454} 3455inline bool Type::isLValueReferenceType() const { 3456 return isa<LValueReferenceType>(CanonicalType); 3457} 3458inline bool Type::isRValueReferenceType() const { 3459 return isa<RValueReferenceType>(CanonicalType); 3460} 3461inline bool Type::isFunctionPointerType() const { 3462 if (const PointerType* T = getAs<PointerType>()) 3463 return T->getPointeeType()->isFunctionType(); 3464 else 3465 return false; 3466} 3467inline bool Type::isMemberPointerType() const { 3468 return isa<MemberPointerType>(CanonicalType); 3469} 3470inline bool Type::isMemberFunctionPointerType() const { 3471 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3472 return T->getPointeeType()->isFunctionType(); 3473 else 3474 return false; 3475} 3476inline bool Type::isArrayType() const { 3477 return isa<ArrayType>(CanonicalType); 3478} 3479inline bool Type::isConstantArrayType() const { 3480 return isa<ConstantArrayType>(CanonicalType); 3481} 3482inline bool Type::isIncompleteArrayType() const { 3483 return isa<IncompleteArrayType>(CanonicalType); 3484} 3485inline bool Type::isVariableArrayType() const { 3486 return isa<VariableArrayType>(CanonicalType); 3487} 3488inline bool Type::isDependentSizedArrayType() const { 3489 return isa<DependentSizedArrayType>(CanonicalType); 3490} 3491inline bool Type::isRecordType() const { 3492 return isa<RecordType>(CanonicalType); 3493} 3494inline bool Type::isAnyComplexType() const { 3495 return isa<ComplexType>(CanonicalType); 3496} 3497inline bool Type::isVectorType() const { 3498 return isa<VectorType>(CanonicalType); 3499} 3500inline bool Type::isExtVectorType() const { 3501 return isa<ExtVectorType>(CanonicalType); 3502} 3503inline bool Type::isObjCObjectPointerType() const { 3504 return isa<ObjCObjectPointerType>(CanonicalType); 3505} 3506inline bool Type::isObjCObjectType() const { 3507 return isa<ObjCObjectType>(CanonicalType); 3508} 3509inline bool Type::isObjCQualifiedIdType() const { 3510 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3511 return OPT->isObjCQualifiedIdType(); 3512 return false; 3513} 3514inline bool Type::isObjCQualifiedClassType() const { 3515 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3516 return OPT->isObjCQualifiedClassType(); 3517 return false; 3518} 3519inline bool Type::isObjCIdType() const { 3520 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3521 return OPT->isObjCIdType(); 3522 return false; 3523} 3524inline bool Type::isObjCClassType() const { 3525 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3526 return OPT->isObjCClassType(); 3527 return false; 3528} 3529inline bool Type::isObjCSelType() const { 3530 if (const PointerType *OPT = getAs<PointerType>()) 3531 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3532 return false; 3533} 3534inline bool Type::isObjCBuiltinType() const { 3535 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3536} 3537inline bool Type::isTemplateTypeParmType() const { 3538 return isa<TemplateTypeParmType>(CanonicalType); 3539} 3540 3541inline bool Type::isBuiltinType() const { 3542 return getAs<BuiltinType>(); 3543} 3544 3545inline bool Type::isSpecificBuiltinType(unsigned K) const { 3546 if (const BuiltinType *BT = getAs<BuiltinType>()) 3547 if (BT->getKind() == (BuiltinType::Kind) K) 3548 return true; 3549 return false; 3550} 3551 3552/// \brief Determines whether this is a type for which one can define 3553/// an overloaded operator. 3554inline bool Type::isOverloadableType() const { 3555 return isDependentType() || isRecordType() || isEnumeralType(); 3556} 3557 3558inline bool Type::hasPointerRepresentation() const { 3559 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3560 isObjCObjectPointerType() || isNullPtrType()); 3561} 3562 3563inline bool Type::hasObjCPointerRepresentation() const { 3564 return isObjCObjectPointerType(); 3565} 3566 3567/// Insertion operator for diagnostics. This allows sending QualType's into a 3568/// diagnostic with <<. 3569inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3570 QualType T) { 3571 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3572 Diagnostic::ak_qualtype); 3573 return DB; 3574} 3575 3576/// Insertion operator for partial diagnostics. This allows sending QualType's 3577/// into a diagnostic with <<. 3578inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 3579 QualType T) { 3580 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3581 Diagnostic::ak_qualtype); 3582 return PD; 3583} 3584 3585// Helper class template that is used by Type::getAs to ensure that one does 3586// not try to look through a qualified type to get to an array type. 3587template<typename T, 3588 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3589 llvm::is_base_of<ArrayType, T>::value)> 3590struct ArrayType_cannot_be_used_with_getAs { }; 3591 3592template<typename T> 3593struct ArrayType_cannot_be_used_with_getAs<T, true>; 3594 3595/// Member-template getAs<specific type>'. 3596template <typename T> const T *Type::getAs() const { 3597 ArrayType_cannot_be_used_with_getAs<T> at; 3598 (void)at; 3599 3600 // If this is directly a T type, return it. 3601 if (const T *Ty = dyn_cast<T>(this)) 3602 return Ty; 3603 3604 // If the canonical form of this type isn't the right kind, reject it. 3605 if (!isa<T>(CanonicalType)) 3606 return 0; 3607 3608 // If this is a typedef for the type, strip the typedef off without 3609 // losing all typedef information. 3610 return cast<T>(getUnqualifiedDesugaredType()); 3611} 3612 3613} // end namespace clang 3614 3615#endif 3616