Type.h revision b43d87b0646aa04951056c7e0d1ab9a58eb09f66
1ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch// 3ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch// The LLVM Compiler Infrastructure 4ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch// 58bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)// This file is distributed under the University of Illinois Open Source 68bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles)// License. See LICENSE.TXT for details. 7a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// 82a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)//===----------------------------------------------------------------------===// 9f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)// 1058e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch// This file defines the Type interface and subclasses. 112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// 122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)//===----------------------------------------------------------------------===// 13effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 14cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)#ifndef LLVM_CLANG_AST_TYPE_H 1558e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#define LLVM_CLANG_AST_TYPE_H 16a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 171320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "clang/Basic/Diagnostic.h" 182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/Basic/ExceptionSpecificationType.h" 192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/Basic/IdentifierTable.h" 202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/Basic/Linkage.h" 21ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch#include "clang/Basic/PartialDiagnostic.h" 222a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "clang/Basic/Visibility.h" 2358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#include "clang/Basic/Specifiers.h" 2458e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#include "clang/AST/NestedNameSpecifier.h" 2558e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#include "clang/AST/TemplateName.h" 2658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#include "llvm/Support/type_traits.h" 2758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#include "llvm/Support/ErrorHandling.h" 2858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch#include "llvm/ADT/APSInt.h" 29a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "llvm/ADT/FoldingSet.h" 30a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "llvm/ADT/Optional.h" 31010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles)#include "llvm/ADT/PointerIntPair.h" 32a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "llvm/ADT/PointerUnion.h" 33a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "llvm/ADT/Twine.h" 34a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "clang/Basic/LLVM.h" 35a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 36a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)namespace clang { 37a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) enum { 38a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) TypeAlignmentInBits = 4, 39a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) TypeAlignment = 1 << TypeAlignmentInBits 40a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) }; 41a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) class Type; 42a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) class ExtQuals; 43a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) class QualType; 44a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 45a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 46a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)namespace llvm { 47010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) template <typename T> 48a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) class PointerLikeTypeTraits; 49a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) template<> 50a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) class PointerLikeTypeTraits< ::clang::Type*> { 512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) public: 5203b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 5303b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) static inline ::clang::Type *getFromVoidPointer(void *P) { 5403b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) return static_cast< ::clang::Type*>(P); 5503b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) } 5603b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 5703b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) }; 5803b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) template<> 5903b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) class PointerLikeTypeTraits< ::clang::ExtQuals*> { 6003b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) public: 6103b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 6203b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 6303b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) return static_cast< ::clang::ExtQuals*>(P); 6403b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) } 6503b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 6603b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) }; 67a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 68cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) template <> 69a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) struct isPodLike<clang::QualType> { static const bool value = true; }; 702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 72a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)namespace clang { 7346d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) class ASTContext; 7446d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) class TypedefNameDecl; 75a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) class TemplateDecl; 76a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) class TemplateTypeParmDecl; 77a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) class NonTypeTemplateParmDecl; 785d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) class TemplateTemplateParmDecl; 79010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) class TagDecl; 805d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) class RecordDecl; 81010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) class CXXRecordDecl; 82010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) class EnumDecl; 83010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) class FieldDecl; 84010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) class FunctionDecl; 855d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) class ObjCInterfaceDecl; 865d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) class ObjCProtocolDecl; 87a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) class ObjCMethodDecl; 88cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) class UnresolvedUsingTypenameDecl; 89a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) class Expr; 90a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) class Stmt; 91a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) class SourceLocation; 925d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) class StmtIteratorBase; 932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) class TemplateArgument; 942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) class TemplateArgumentLoc; 953551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) class TemplateArgumentListInfo; 96a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) class ElaboratedType; 97a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) class ExtQuals; 983551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) class ExtQualsTypeCommonBase; 99a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) struct PrintingPolicy; 100a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 1013551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) template <typename> class CanQual; 1023551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) typedef CanQual<Type> CanQualType; 103a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 104a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Provide forward declarations for all of the *Type classes 105a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#define TYPE(Class, Base) class Class##Type; 106a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "clang/AST/TypeNodes.def" 1072a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1082a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// Qualifiers - The collection of all-type qualifiers we support. 1092a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// Clang supports five independent qualifiers: 110a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)/// * C99: const, volatile, and restrict 1112a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// * Embedded C (TR18037): address spaces 1122a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)/// * Objective C: the GC attributes (none, weak, or strong) 1131320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucciclass Qualifiers { 114cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)public: 1151320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 1161320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci Const = 0x1, 1171320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci Restrict = 0x2, 1181320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci Volatile = 0x4, 119a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) CVRMask = Const | Volatile | Restrict 120a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) }; 121a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 122a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) enum GC { 123a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) GCNone = 0, 124010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) Weak, 125a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) Strong 12603b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) }; 127a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 128010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) enum ObjCLifetime { 129010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) /// There is no lifetime qualification on this type. 130010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) OCL_None, 131010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) 1321320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci /// This object can be modified without requiring retains or 1332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /// releases. 1342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) OCL_ExplicitNone, 135effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 136effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch /// Assigning into this object requires the old value to be 137effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch /// released and the new value to be retained. The timing of the 138effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch /// release of the old value is inexact: it may be moved to 1392a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /// immediately after the last known point where the value is 14058e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch /// live. 141a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) OCL_Strong, 1422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /// Reading or writing from this object requires a barrier call. 144effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch OCL_Weak, 145effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 146effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch /// Assigning into this object requires a lifetime extension. 147effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch OCL_Autoreleasing 148effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch }; 149effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 150effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch enum { 1512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /// The maximum supported address space number. 15203b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) /// 24 bits should be enough for anyone. 15303b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) MaxAddressSpace = 0xffffffu, 15403b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) 1552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /// The width of the "fast" qualifier mask. 15603b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) FastWidth = 3, 15703b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) 15803b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) /// The fast qualifier mask. 15903b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) FastMask = (1 << FastWidth) - 1 16003b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) }; 16103b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) 16203b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) Qualifiers() : Mask(0) {} 16303b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) 16403b57e008b61dfcb1fbad3aea950ae0e001748b0Torne (Richard Coles) /// \brief Returns the common set of qualifiers while removing them from 1652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /// the given sets. 1662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) { 1672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // If both are only CVR-qualified, bit operations are sufficient. 168a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) { 1692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Qualifiers Q; 1702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Q.Mask = L.Mask & R.Mask; 1712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) L.Mask &= ~Q.Mask; 17258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch R.Mask &= ~Q.Mask; 173a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return Q; 1742a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 1752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1762a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Qualifiers Q; 17758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers(); 178a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) Q.addCVRQualifiers(CommonCRV); 1792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) L.removeCVRQualifiers(CommonCRV); 1802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) R.removeCVRQualifiers(CommonCRV); 1812a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 18258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch if (L.getObjCGCAttr() == R.getObjCGCAttr()) { 183a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) Q.setObjCGCAttr(L.getObjCGCAttr()); 1842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) L.removeObjCGCAttr(); 1852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) R.removeObjCGCAttr(); 18646d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) } 18758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 188a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (L.getObjCLifetime() == R.getObjCLifetime()) { 1892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Q.setObjCLifetime(L.getObjCLifetime()); 1902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) L.removeObjCLifetime(); 1918bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) R.removeObjCLifetime(); 1928bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) } 193a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 1948bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) if (L.getAddressSpace() == R.getAddressSpace()) { 1958bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) Q.setAddressSpace(L.getAddressSpace()); 1964e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) L.removeAddressSpace(); 1974e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) R.removeAddressSpace(); 198a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 1994e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) return Q; 2004e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) } 20146d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) 20258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch static Qualifiers fromFastMask(unsigned Mask) { 203a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) Qualifiers Qs; 2042a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Qs.addFastQualifiers(Mask); 2052a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return Qs; 20646d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) } 20758e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 208a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) static Qualifiers fromCVRMask(unsigned CVR) { 2092a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Qualifiers Qs; 2102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Qs.addCVRQualifiers(CVR); 21146d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) return Qs; 21258e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch } 213a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 2142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Deserialize qualifiers from an opaque representation. 2152a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) static Qualifiers fromOpaqueValue(unsigned opaque) { 21646d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) Qualifiers Qs; 21746d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) Qs.Mask = opaque; 21846d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) return Qs; 21946d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) } 22046d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) 22158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch // Serialize these qualifiers into an opaque representation. 222a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) unsigned getAsOpaqueValue() const { 2232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return Mask; 2242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 22546d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) 22658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch bool hasConst() const { return Mask & Const; } 227a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) void setConst(bool flag) { 2282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Mask = (Mask & ~Const) | (flag ? Const : 0); 2292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 2301320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci void removeConst() { Mask &= ~Const; } 23158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch void addConst() { Mask |= Const; } 2321320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 2332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) bool hasVolatile() const { return Mask & Volatile; } 2342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) void setVolatile(bool flag) { 23568043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles) Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 23668043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles) } 237a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) void removeVolatile() { Mask &= ~Volatile; } 23868043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles) void addVolatile() { Mask |= Volatile; } 23968043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles) 24046d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) bool hasRestrict() const { return Mask & Restrict; } 24158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch void setRestrict(bool flag) { 242a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 2432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 2442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) void removeRestrict() { Mask &= ~Restrict; } 24546d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) void addRestrict() { Mask |= Restrict; } 24658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 247a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bool hasCVRQualifiers() const { return getCVRQualifiers(); } 2482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned getCVRQualifiers() const { return Mask & CVRMask; } 2492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) void setCVRQualifiers(unsigned mask) { 25046d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 25158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch Mask = (Mask & ~CVRMask) | mask; 252a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 2532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) void removeCVRQualifiers(unsigned mask) { 2542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 25546d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) Mask &= ~mask; 25658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch } 257a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) void removeCVRQualifiers() { 2582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) removeCVRQualifiers(CVRMask); 2592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 26090dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) void addCVRQualifiers(unsigned mask) { 26158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 262a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) Mask |= mask; 26390dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) } 26490dce4d38c5ff5333bea97d859d4e484e27edf0cTorne (Richard Coles) 2652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 26658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 267a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) void setObjCGCAttr(GC type) { 2682a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 2692a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 2708bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 2718bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) void addObjCGCAttr(GC type) { 272a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) assert(type); 2738bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) setObjCGCAttr(type); 2748bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) } 2752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Qualifiers withoutObjCGCAttr() const { 27658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch Qualifiers qs = *this; 277a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) qs.removeObjCGCAttr(); 2782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return qs; 2792a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 2802a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Qualifiers withoutObjCLifetime() const { 28158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch Qualifiers qs = *this; 282a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) qs.removeObjCLifetime(); 2832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return qs; 2842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 2852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 28658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch bool hasObjCLifetime() const { return Mask & LifetimeMask; } 287a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) ObjCLifetime getObjCLifetime() const { 2882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); 2892a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 2902a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) void setObjCLifetime(ObjCLifetime type) { 29158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); 292a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 2932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) void removeObjCLifetime() { setObjCLifetime(OCL_None); } 2942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) void addObjCLifetime(ObjCLifetime type) { 2952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(type); 29658e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch assert(!hasObjCLifetime()); 297a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) Mask |= (type << LifetimeShift); 2982a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 2992a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3008bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) /// True if the lifetime is neither None or ExplicitNone. 30158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch bool hasNonTrivialObjCLifetime() const { 302a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) ObjCLifetime lifetime = getObjCLifetime(); 3038bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) return (lifetime > OCL_ExplicitNone); 3048bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) } 3058bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 3068bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) /// True if the lifetime is either strong or weak. 307a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bool hasStrongOrWeakObjCLifetime() const { 3082a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ObjCLifetime lifetime = getObjCLifetime(); 3092a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return (lifetime == OCL_Strong || lifetime == OCL_Weak); 3102a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 31158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 312a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 3132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 3142a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) void setAddressSpace(unsigned space) { 3158bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) assert(space <= MaxAddressSpace); 3168bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) Mask = (Mask & ~AddressSpaceMask) 317a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) | (((uint32_t) space) << AddressSpaceShift); 3188bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) } 3198bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) void removeAddressSpace() { setAddressSpace(0); } 3202a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) void addAddressSpace(unsigned space) { 32158e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch assert(space); 322a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) setAddressSpace(space); 3232a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 3242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 3258bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) // Fast qualifiers are those that can be allocated directly 3268bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) // on a QualType object. 327a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bool hasFastQualifiers() const { return getFastQualifiers(); } 3288bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) unsigned getFastQualifiers() const { return Mask & FastMask; } 3298bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) void setFastQualifiers(unsigned mask) { 33046d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 3318bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) Mask = (Mask & ~FastMask) | mask; 332a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 3338bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) void removeFastQualifiers(unsigned mask) { 3348bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 33546d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) Mask &= ~mask; 3368bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) } 3371320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci void removeFastQualifiers() { 3381320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci removeFastQualifiers(FastMask); 3391320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci } 3401320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci void addFastQualifiers(unsigned mask) { 3411320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 3421320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci Mask |= mask; 3431320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci } 3441320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 3451320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci /// hasNonFastQualifiers - Return true if the set contains any 3461320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci /// qualifiers which require an ExtQuals node to be allocated. 3471320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 3481320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci Qualifiers getNonFastQualifiers() const { 3491320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci Qualifiers Quals = *this; 3501320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci Quals.setFastQualifiers(0); 3511320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci return Quals; 3521320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci } 3531320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 3541320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci /// hasQualifiers - Return true if the set contains any qualifiers. 3558bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) bool hasQualifiers() const { return Mask; } 3568bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) bool empty() const { return !Mask; } 35746d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) 35846d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) /// \brief Add the qualifiers from the given set to this set. 35946d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) void addQualifiers(Qualifiers Q) { 36046d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) // If the other set doesn't have any non-boolean qualifiers, just 36146d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) // bit-or it in. 3622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!(Q.Mask & ~CVRMask)) 36358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch Mask |= Q.Mask; 364a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) else { 3652a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) Mask |= (Q.Mask & CVRMask); 3662a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (Q.hasAddressSpace()) 3672a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) addAddressSpace(Q.getAddressSpace()); 36858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch if (Q.hasObjCGCAttr()) 369a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) addObjCGCAttr(Q.getObjCGCAttr()); 3702a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (Q.hasObjCLifetime()) 3712a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) addObjCLifetime(Q.getObjCLifetime()); 3722a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 37346d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) } 37446d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) 3752a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) /// \brief Remove the qualifiers from the given set from this set. 376eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch void removeQualifiers(Qualifiers Q) { 3774e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) // If the other set doesn't have any non-boolean qualifiers, just 37868043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles) // bit-and the inverse in. 379a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (!(Q.Mask & ~CVRMask)) 38068043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles) Mask &= ~Q.Mask; 38168043e1e95eeb07d5cae7aca370b26518b0867d6Torne (Richard Coles) else { 3824e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) Mask &= ~(Q.Mask & CVRMask); 38358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch if (getObjCGCAttr() == Q.getObjCGCAttr()) 384a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) removeObjCGCAttr(); 385eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch if (getObjCLifetime() == Q.getObjCLifetime()) 386eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch removeObjCLifetime(); 387eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch if (getAddressSpace() == Q.getAddressSpace()) 38858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch removeAddressSpace(); 389a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 390eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch } 391eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 392eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch /// \brief Add the qualifiers from the given set to this set, given that 39358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch /// they don't conflict. 394a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) void addConsistentQualifiers(Qualifiers qs) { 395eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch assert(getAddressSpace() == qs.getAddressSpace() || 396eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch !hasAddressSpace() || !qs.hasAddressSpace()); 397eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch assert(getObjCGCAttr() == qs.getObjCGCAttr() || 39858e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch !hasObjCGCAttr() || !qs.hasObjCGCAttr()); 399a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) assert(getObjCLifetime() == qs.getObjCLifetime() || 400eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch !hasObjCLifetime() || !qs.hasObjCLifetime()); 401eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch Mask |= qs.Mask; 402eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch } 40358e6fbe4ee35d65e14b626c557d37565bf8ad179Ben Murdoch 4041320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci /// \brief Determines if these qualifiers compatibly include another set. 4051320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci /// Generally this answers the question of whether an object with the other 4061320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci /// qualifiers can be safely used as an object with these qualifiers. 4071320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci bool compatiblyIncludes(Qualifiers other) const { 4081320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci return 4091320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // Address spaces must match exactly. 4101320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci getAddressSpace() == other.getAddressSpace() && 4111320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // ObjC GC qualifiers can match, be added, or be removed, but can't be 4121320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // changed. 4131320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci (getObjCGCAttr() == other.getObjCGCAttr() || 4141320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci !hasObjCGCAttr() || !other.hasObjCGCAttr()) && 4151320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci // ObjC lifetime qualifiers must match exactly. 416eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch getObjCLifetime() == other.getObjCLifetime() && 417a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) // CVR qualifiers may subset. 41846d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)); 419a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 4203240926e260ce088908e02ac07a6cf7b0c0cbf44Ben Murdoch 4213240926e260ce088908e02ac07a6cf7b0c0cbf44Ben Murdoch /// \brief Determines if these qualifiers compatibly include another set of 42246d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) /// qualifiers from the narrow perspective of Objective-C ARC lifetime. 42346d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) /// 42446d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) /// One set of Objective-C lifetime qualifiers compatibly includes the other 42546d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) /// if the lifetime qualifiers match, or if both are non-__weak and the 42646d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) /// including set also contains the 'const' qualifier. 427a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bool compatiblyIncludesObjCLifetime(Qualifiers other) const { 4283240926e260ce088908e02ac07a6cf7b0c0cbf44Ben Murdoch if (getObjCLifetime() == other.getObjCLifetime()) 4293240926e260ce088908e02ac07a6cf7b0c0cbf44Ben Murdoch return true; 430bb1529ce867d8845a77ec7cdf3e3003ef1771a40Ben Murdoch 431bb1529ce867d8845a77ec7cdf3e3003ef1771a40Ben Murdoch if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) 432a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return false; 433bb1529ce867d8845a77ec7cdf3e3003ef1771a40Ben Murdoch 434bb1529ce867d8845a77ec7cdf3e3003ef1771a40Ben Murdoch return hasConst(); 435bb1529ce867d8845a77ec7cdf3e3003ef1771a40Ben Murdoch } 436bb1529ce867d8845a77ec7cdf3e3003ef1771a40Ben Murdoch 437a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) /// \brief Determine whether this set of qualifiers is a strict superset of 438bb1529ce867d8845a77ec7cdf3e3003ef1771a40Ben Murdoch /// another set of qualifiers, not considering qualifier compatibility. 439bb1529ce867d8845a77ec7cdf3e3003ef1771a40Ben Murdoch bool isStrictSupersetOf(Qualifiers Other) const; 44046d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) 44146d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 44246d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 443bb1529ce867d8845a77ec7cdf3e3003ef1771a40Ben Murdoch 444a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) operator bool() const { return hasQualifiers(); } 445bb1529ce867d8845a77ec7cdf3e3003ef1771a40Ben Murdoch 446bb1529ce867d8845a77ec7cdf3e3003ef1771a40Ben Murdoch Qualifiers &operator+=(Qualifiers R) { 4473551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) addQualifiers(R); 4483551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) return *this; 449a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 4503551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 4513551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) // Union two qualifier sets. If an enumerated qualifier appears 4528bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) // in both sets, use the one from the right. 4538bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 4548bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) L += R; 4558bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) return L; 4568bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) } 45746d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) 45846d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) Qualifiers &operator-=(Qualifiers R) { 459f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) removeQualifiers(R); 460f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) return *this; 461a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 4628bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 4638bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) /// \brief Compute the difference between two qualifier sets. 4648bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 4658bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) L -= R; 4668bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) return L; 4678bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) } 4688bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 4698bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) std::string getAsString() const; 4708bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) std::string getAsString(const PrintingPolicy &Policy) const; 4718bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 4728bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const; 4738bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) void print(raw_ostream &OS, const PrintingPolicy &Policy, 4748bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) bool appendSpaceIfNonEmpty = false) const; 4758bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) 4768bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) void Profile(llvm::FoldingSetNodeID &ID) const { 4778bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) ID.AddInteger(Mask); 4788bcbed890bc3ce4d7a057a8f32cab53fa534672eTorne (Richard Coles) } 4793551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 480f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)private: 4813551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) 4823551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) // bits: |0 1 2|3 .. 4|5 .. 7|8 ... 31| 4833551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) // |C R V|GCAttr|Lifetime|AddressSpace| 4843551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) uint32_t Mask; 485f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 486f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) static const uint32_t GCAttrMask = 0x18; 487f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) static const uint32_t GCAttrShift = 3; 488f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) static const uint32_t LifetimeMask = 0xE0; 489f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) static const uint32_t LifetimeShift = 5; 490f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) static const uint32_t AddressSpaceMask = ~(CVRMask|GCAttrMask|LifetimeMask); 491a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) static const uint32_t AddressSpaceShift = 8; 492f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)}; 493f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) 494f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles)/// A std::pair-like structure for storing a qualified type split 4953551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)/// into its local qualifiers and its locally-unqualified type. 4963551c9c881056c480085172ff9840cab31610854Torne (Richard Coles)struct SplitQualType { 497a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) /// The locally-unqualified type. 498a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) const Type *Ty; 499a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 5005d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) /// The local qualifiers. 501a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) Qualifiers Quals; 502a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 503a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) SplitQualType() : Ty(0), Quals() {} 504a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {} 5055d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 506a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) SplitQualType getSingleStepDesugaredType() const; // end of this file 507a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 508a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) // Make llvm::tie work. 509a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) operator std::pair<const Type *,Qualifiers>() const { 5105d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) return std::pair<const Type *,Qualifiers>(Ty, Quals); 511a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 512a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 513a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) friend bool operator==(SplitQualType a, SplitQualType b) { 514bb1529ce867d8845a77ec7cdf3e3003ef1771a40Ben Murdoch return a.Ty == b.Ty && a.Quals == b.Quals; 5155d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) } 516a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) friend bool operator!=(SplitQualType a, SplitQualType b) { 517bb1529ce867d8845a77ec7cdf3e3003ef1771a40Ben Murdoch return a.Ty != b.Ty || a.Quals != b.Quals; 518bb1529ce867d8845a77ec7cdf3e3003ef1771a40Ben Murdoch } 5191320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci}; 5201320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci 5211320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci/// QualType - For efficiency, we don't store CV-qualified types as nodes on 5221320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci/// their own: instead each reference to a type stores the qualifiers. This 5231320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci/// greatly reduces the number of nodes we need to allocate for types (for 5241320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci/// example we only need one for 'int', 'const int', 'volatile int', 5251320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci/// 'const volatile int', etc). 5261320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci/// 5271320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci/// As an added efficiency bonus, instead of making this a pair, we 5281320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci/// just store the two bits we care about in the low bits of the 5291320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci/// pointer. To handle the packing/unpacking, we make QualType be a 5301320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci/// simple wrapper class that acts like a smart pointer. A third bit 53146d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles)/// indicates whether there are extended qualifiers present, in which 53246d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles)/// case the pointer points to a special structure. 53346d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles)class QualType { 53446d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) // Thankfully, these are efficiently composable. 5355d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 536a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) Qualifiers::FastWidth> Value; 5375d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 5385d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) const ExtQuals *getExtQualsUnsafe() const { 53946d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) return Value.getPointer().get<const ExtQuals*>(); 540a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 5415d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 5425d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) const Type *getTypePtrUnsafe() const { 543a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) return Value.getPointer().get<const Type*>(); 5445d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) } 545a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 546a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) const ExtQualsTypeCommonBase *getCommonPtr() const { 547a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) assert(!isNull() && "Cannot retrieve a NULL type pointer"); 548a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) uintptr_t CommonPtrVal 5495d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 550a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 551a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 5524e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) } 553a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 5545d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) friend class QualifierCollector; 555a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)public: 556a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) QualType() {} 557a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 558a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) QualType(const Type *Ptr, unsigned Quals) 5595d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) : Value(Ptr, Quals) {} 560a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) QualType(const ExtQuals *Ptr, unsigned Quals) 561a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) : Value(Ptr, Quals) {} 562a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 563a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) unsigned getLocalFastQualifiers() const { return Value.getInt(); } 5645d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 565a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 566a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) /// Retrieves a pointer to the underlying (unqualified) type. 567a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) /// 56846d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) /// This function requires that the type not be NULL. If the type might be 56946d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 57046d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) const Type *getTypePtr() const; 57146d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) 57246d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) const Type *getTypePtrOrNull() const; 57346d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) 5745d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) /// Retrieves a pointer to the name of the base type. 575a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) const IdentifierInfo *getBaseTypeIdentifier() const; 576a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 577a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) /// Divides a QualType into its unqualified type and a set of local 578a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) /// qualifiers. 5795d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) SplitQualType split() const; 580a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 581a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 582a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) static QualType getFromOpaquePtr(const void *Ptr) { 583a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) QualType T; 5845d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); 585a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return T; 586a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) } 587a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 58846d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) const Type &operator*() const { 58946d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) return *getTypePtr(); 59046d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) } 59146d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) 59246d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) const Type *operator->() const { 59346d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) return getTypePtr(); 5945d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) } 595a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 596a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) bool isCanonical() const; 597a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) bool isCanonicalAsParam() const; 598a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 5995d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) /// isNull - Return true if this QualType doesn't point to a type yet. 600a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bool isNull() const { 601a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) return Value.getPointer().isNull(); 602a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) } 60346d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) 60446d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) /// \brief Determine whether this particular QualType instance has the 60546d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) /// "const" qualifier set, without looking through typedefs that may have 60646d4c2bc3267f3f028f39e7e311b0f89aba2e4fdTorne (Richard Coles) /// added "const" at a different level. 607a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) bool isLocalConstQualified() const { 6085d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) return (getLocalFastQualifiers() & Qualifiers::Const); 609a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 610a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 611a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) /// \brief Determine whether this type is const-qualified. 612a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) bool isConstQualified() const; 6135d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 614a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) /// \brief Determine whether this particular QualType instance has the 615a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) /// "restrict" qualifier set, without looking through typedefs that may have 616a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) /// added "restrict" at a different level. 617a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) bool isLocalRestrictQualified() const { 6185d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) return (getLocalFastQualifiers() & Qualifiers::Restrict); 619a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 620a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) 621a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) /// \brief Determine whether this type is restrict-qualified. 622a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) bool isRestrictQualified() const; 6235d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 624a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) /// \brief Determine whether this particular QualType instance has the 625a36e5920737c6adbddd3e43b760e5de8431db6e0Torne (Richard Coles) /// "volatile" qualifier set, without looking through typedefs that may have 626bb1529ce867d8845a77ec7cdf3e3003ef1771a40Ben Murdoch /// added "volatile" at a different level. 627 bool isLocalVolatileQualified() const { 628 return (getLocalFastQualifiers() & Qualifiers::Volatile); 629 } 630 631 /// \brief Determine whether this type is volatile-qualified. 632 bool isVolatileQualified() const; 633 634 /// \brief Determine whether this particular QualType instance has any 635 /// qualifiers, without looking through any typedefs that might add 636 /// qualifiers at a different level. 637 bool hasLocalQualifiers() const { 638 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 639 } 640 641 /// \brief Determine whether this type has any qualifiers. 642 bool hasQualifiers() const; 643 644 /// \brief Determine whether this particular QualType instance has any 645 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 646 /// instance. 647 bool hasLocalNonFastQualifiers() const { 648 return Value.getPointer().is<const ExtQuals*>(); 649 } 650 651 /// \brief Retrieve the set of qualifiers local to this particular QualType 652 /// instance, not including any qualifiers acquired through typedefs or 653 /// other sugar. 654 Qualifiers getLocalQualifiers() const; 655 656 /// \brief Retrieve the set of qualifiers applied to this type. 657 Qualifiers getQualifiers() const; 658 659 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 660 /// local to this particular QualType instance, not including any qualifiers 661 /// acquired through typedefs or other sugar. 662 unsigned getLocalCVRQualifiers() const { 663 return getLocalFastQualifiers(); 664 } 665 666 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 667 /// applied to this type. 668 unsigned getCVRQualifiers() const; 669 670 bool isConstant(ASTContext& Ctx) const { 671 return QualType::isConstant(*this, Ctx); 672 } 673 674 /// \brief Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). 675 bool isPODType(ASTContext &Context) const; 676 677 /// isCXX98PODType() - Return true if this is a POD type according to the 678 /// rules of the C++98 standard, regardless of the current compilation's 679 /// language. 680 bool isCXX98PODType(ASTContext &Context) const; 681 682 /// isCXX11PODType() - Return true if this is a POD type according to the 683 /// more relaxed rules of the C++11 standard, regardless of the current 684 /// compilation's language. 685 /// (C++0x [basic.types]p9) 686 bool isCXX11PODType(ASTContext &Context) const; 687 688 /// isTrivialType - Return true if this is a trivial type 689 /// (C++0x [basic.types]p9) 690 bool isTrivialType(ASTContext &Context) const; 691 692 /// isTriviallyCopyableType - Return true if this is a trivially 693 /// copyable type (C++0x [basic.types]p9) 694 bool isTriviallyCopyableType(ASTContext &Context) const; 695 696 // Don't promise in the API that anything besides 'const' can be 697 // easily added. 698 699 /// addConst - add the specified type qualifier to this QualType. 700 void addConst() { 701 addFastQualifiers(Qualifiers::Const); 702 } 703 QualType withConst() const { 704 return withFastQualifiers(Qualifiers::Const); 705 } 706 707 /// addVolatile - add the specified type qualifier to this QualType. 708 void addVolatile() { 709 addFastQualifiers(Qualifiers::Volatile); 710 } 711 QualType withVolatile() const { 712 return withFastQualifiers(Qualifiers::Volatile); 713 } 714 715 /// Add the restrict qualifier to this QualType. 716 void addRestrict() { 717 addFastQualifiers(Qualifiers::Restrict); 718 } 719 QualType withRestrict() const { 720 return withFastQualifiers(Qualifiers::Restrict); 721 } 722 723 QualType withCVRQualifiers(unsigned CVR) const { 724 return withFastQualifiers(CVR); 725 } 726 727 void addFastQualifiers(unsigned TQs) { 728 assert(!(TQs & ~Qualifiers::FastMask) 729 && "non-fast qualifier bits set in mask!"); 730 Value.setInt(Value.getInt() | TQs); 731 } 732 733 void removeLocalConst(); 734 void removeLocalVolatile(); 735 void removeLocalRestrict(); 736 void removeLocalCVRQualifiers(unsigned Mask); 737 738 void removeLocalFastQualifiers() { Value.setInt(0); } 739 void removeLocalFastQualifiers(unsigned Mask) { 740 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 741 Value.setInt(Value.getInt() & ~Mask); 742 } 743 744 // Creates a type with the given qualifiers in addition to any 745 // qualifiers already on this type. 746 QualType withFastQualifiers(unsigned TQs) const { 747 QualType T = *this; 748 T.addFastQualifiers(TQs); 749 return T; 750 } 751 752 // Creates a type with exactly the given fast qualifiers, removing 753 // any existing fast qualifiers. 754 QualType withExactLocalFastQualifiers(unsigned TQs) const { 755 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 756 } 757 758 // Removes fast qualifiers, but leaves any extended qualifiers in place. 759 QualType withoutLocalFastQualifiers() const { 760 QualType T = *this; 761 T.removeLocalFastQualifiers(); 762 return T; 763 } 764 765 QualType getCanonicalType() const; 766 767 /// \brief Return this type with all of the instance-specific qualifiers 768 /// removed, but without removing any qualifiers that may have been applied 769 /// through typedefs. 770 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 771 772 /// \brief Retrieve the unqualified variant of the given type, 773 /// removing as little sugar as possible. 774 /// 775 /// This routine looks through various kinds of sugar to find the 776 /// least-desugared type that is unqualified. For example, given: 777 /// 778 /// \code 779 /// typedef int Integer; 780 /// typedef const Integer CInteger; 781 /// typedef CInteger DifferenceType; 782 /// \endcode 783 /// 784 /// Executing \c getUnqualifiedType() on the type \c DifferenceType will 785 /// desugar until we hit the type \c Integer, which has no qualifiers on it. 786 /// 787 /// The resulting type might still be qualified if it's an array 788 /// type. To strip qualifiers even from within an array type, use 789 /// ASTContext::getUnqualifiedArrayType. 790 inline QualType getUnqualifiedType() const; 791 792 /// getSplitUnqualifiedType - Retrieve the unqualified variant of the 793 /// given type, removing as little sugar as possible. 794 /// 795 /// Like getUnqualifiedType(), but also returns the set of 796 /// qualifiers that were built up. 797 /// 798 /// The resulting type might still be qualified if it's an array 799 /// type. To strip qualifiers even from within an array type, use 800 /// ASTContext::getUnqualifiedArrayType. 801 inline SplitQualType getSplitUnqualifiedType() const; 802 803 /// \brief Determine whether this type is more qualified than the other 804 /// given type, requiring exact equality for non-CVR qualifiers. 805 bool isMoreQualifiedThan(QualType Other) const; 806 807 /// \brief Determine whether this type is at least as qualified as the other 808 /// given type, requiring exact equality for non-CVR qualifiers. 809 bool isAtLeastAsQualifiedAs(QualType Other) const; 810 811 QualType getNonReferenceType() const; 812 813 /// \brief Determine the type of a (typically non-lvalue) expression with the 814 /// specified result type. 815 /// 816 /// This routine should be used for expressions for which the return type is 817 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 818 /// an lvalue. It removes a top-level reference (since there are no 819 /// expressions of reference type) and deletes top-level cvr-qualifiers 820 /// from non-class types (in C++) or all types (in C). 821 QualType getNonLValueExprType(ASTContext &Context) const; 822 823 /// getDesugaredType - Return the specified type with any "sugar" removed from 824 /// the type. This takes off typedefs, typeof's etc. If the outer level of 825 /// the type is already concrete, it returns it unmodified. This is similar 826 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 827 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 828 /// concrete. 829 /// 830 /// Qualifiers are left in place. 831 QualType getDesugaredType(const ASTContext &Context) const { 832 return getDesugaredType(*this, Context); 833 } 834 835 SplitQualType getSplitDesugaredType() const { 836 return getSplitDesugaredType(*this); 837 } 838 839 /// \brief Return the specified type with one level of "sugar" removed from 840 /// the type. 841 /// 842 /// This routine takes off the first typedef, typeof, etc. If the outer level 843 /// of the type is already concrete, it returns it unmodified. 844 QualType getSingleStepDesugaredType(const ASTContext &Context) const { 845 return getSingleStepDesugaredTypeImpl(*this, Context); 846 } 847 848 /// IgnoreParens - Returns the specified type after dropping any 849 /// outer-level parentheses. 850 QualType IgnoreParens() const { 851 if (isa<ParenType>(*this)) 852 return QualType::IgnoreParens(*this); 853 return *this; 854 } 855 856 /// operator==/!= - Indicate whether the specified types and qualifiers are 857 /// identical. 858 friend bool operator==(const QualType &LHS, const QualType &RHS) { 859 return LHS.Value == RHS.Value; 860 } 861 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 862 return LHS.Value != RHS.Value; 863 } 864 std::string getAsString() const { 865 return getAsString(split()); 866 } 867 static std::string getAsString(SplitQualType split) { 868 return getAsString(split.Ty, split.Quals); 869 } 870 static std::string getAsString(const Type *ty, Qualifiers qs); 871 872 std::string getAsString(const PrintingPolicy &Policy) const; 873 874 void print(raw_ostream &OS, const PrintingPolicy &Policy, 875 const Twine &PlaceHolder = Twine()) const { 876 print(split(), OS, Policy, PlaceHolder); 877 } 878 static void print(SplitQualType split, raw_ostream &OS, 879 const PrintingPolicy &policy, const Twine &PlaceHolder) { 880 return print(split.Ty, split.Quals, OS, policy, PlaceHolder); 881 } 882 static void print(const Type *ty, Qualifiers qs, 883 raw_ostream &OS, const PrintingPolicy &policy, 884 const Twine &PlaceHolder); 885 886 void getAsStringInternal(std::string &Str, 887 const PrintingPolicy &Policy) const { 888 return getAsStringInternal(split(), Str, Policy); 889 } 890 static void getAsStringInternal(SplitQualType split, std::string &out, 891 const PrintingPolicy &policy) { 892 return getAsStringInternal(split.Ty, split.Quals, out, policy); 893 } 894 static void getAsStringInternal(const Type *ty, Qualifiers qs, 895 std::string &out, 896 const PrintingPolicy &policy); 897 898 class StreamedQualTypeHelper { 899 const QualType &T; 900 const PrintingPolicy &Policy; 901 const Twine &PlaceHolder; 902 public: 903 StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, 904 const Twine &PlaceHolder) 905 : T(T), Policy(Policy), PlaceHolder(PlaceHolder) { } 906 907 friend raw_ostream &operator<<(raw_ostream &OS, 908 const StreamedQualTypeHelper &SQT) { 909 SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder); 910 return OS; 911 } 912 }; 913 914 StreamedQualTypeHelper stream(const PrintingPolicy &Policy, 915 const Twine &PlaceHolder = Twine()) const { 916 return StreamedQualTypeHelper(*this, Policy, PlaceHolder); 917 } 918 919 void dump(const char *s) const; 920 void dump() const; 921 922 void Profile(llvm::FoldingSetNodeID &ID) const { 923 ID.AddPointer(getAsOpaquePtr()); 924 } 925 926 /// getAddressSpace - Return the address space of this type. 927 inline unsigned getAddressSpace() const; 928 929 /// getObjCGCAttr - Returns gc attribute of this type. 930 inline Qualifiers::GC getObjCGCAttr() const; 931 932 /// isObjCGCWeak true when Type is objc's weak. 933 bool isObjCGCWeak() const { 934 return getObjCGCAttr() == Qualifiers::Weak; 935 } 936 937 /// isObjCGCStrong true when Type is objc's strong. 938 bool isObjCGCStrong() const { 939 return getObjCGCAttr() == Qualifiers::Strong; 940 } 941 942 /// getObjCLifetime - Returns lifetime attribute of this type. 943 Qualifiers::ObjCLifetime getObjCLifetime() const { 944 return getQualifiers().getObjCLifetime(); 945 } 946 947 bool hasNonTrivialObjCLifetime() const { 948 return getQualifiers().hasNonTrivialObjCLifetime(); 949 } 950 951 bool hasStrongOrWeakObjCLifetime() const { 952 return getQualifiers().hasStrongOrWeakObjCLifetime(); 953 } 954 955 enum DestructionKind { 956 DK_none, 957 DK_cxx_destructor, 958 DK_objc_strong_lifetime, 959 DK_objc_weak_lifetime 960 }; 961 962 /// isDestructedType - nonzero if objects of this type require 963 /// non-trivial work to clean up after. Non-zero because it's 964 /// conceivable that qualifiers (objc_gc(weak)?) could make 965 /// something require destruction. 966 DestructionKind isDestructedType() const { 967 return isDestructedTypeImpl(*this); 968 } 969 970 /// \brief Determine whether expressions of the given type are forbidden 971 /// from being lvalues in C. 972 /// 973 /// The expression types that are forbidden to be lvalues are: 974 /// - 'void', but not qualified void 975 /// - function types 976 /// 977 /// The exact rule here is C99 6.3.2.1: 978 /// An lvalue is an expression with an object type or an incomplete 979 /// type other than void. 980 bool isCForbiddenLValueType() const; 981 982 /// \brief Determine whether this type has trivial copy/move-assignment 983 /// semantics. 984 bool hasTrivialAssignment(ASTContext &Context, bool Copying) const; 985 986private: 987 // These methods are implemented in a separate translation unit; 988 // "static"-ize them to avoid creating temporary QualTypes in the 989 // caller. 990 static bool isConstant(QualType T, ASTContext& Ctx); 991 static QualType getDesugaredType(QualType T, const ASTContext &Context); 992 static SplitQualType getSplitDesugaredType(QualType T); 993 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); 994 static QualType getSingleStepDesugaredTypeImpl(QualType type, 995 const ASTContext &C); 996 static QualType IgnoreParens(QualType T); 997 static DestructionKind isDestructedTypeImpl(QualType type); 998}; 999 1000} // end clang. 1001 1002namespace llvm { 1003/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 1004/// to a specific Type class. 1005template<> struct simplify_type<const ::clang::QualType> { 1006 typedef const ::clang::Type *SimpleType; 1007 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 1008 return Val.getTypePtr(); 1009 } 1010}; 1011template<> struct simplify_type< ::clang::QualType> 1012 : public simplify_type<const ::clang::QualType> {}; 1013 1014// Teach SmallPtrSet that QualType is "basically a pointer". 1015template<> 1016class PointerLikeTypeTraits<clang::QualType> { 1017public: 1018 static inline void *getAsVoidPointer(clang::QualType P) { 1019 return P.getAsOpaquePtr(); 1020 } 1021 static inline clang::QualType getFromVoidPointer(void *P) { 1022 return clang::QualType::getFromOpaquePtr(P); 1023 } 1024 // Various qualifiers go in low bits. 1025 enum { NumLowBitsAvailable = 0 }; 1026}; 1027 1028} // end namespace llvm 1029 1030namespace clang { 1031 1032/// \brief Base class that is common to both the \c ExtQuals and \c Type 1033/// classes, which allows \c QualType to access the common fields between the 1034/// two. 1035/// 1036class ExtQualsTypeCommonBase { 1037 ExtQualsTypeCommonBase(const Type *baseType, QualType canon) 1038 : BaseType(baseType), CanonicalType(canon) {} 1039 1040 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 1041 /// a self-referential pointer (for \c Type). 1042 /// 1043 /// This pointer allows an efficient mapping from a QualType to its 1044 /// underlying type pointer. 1045 const Type *const BaseType; 1046 1047 /// \brief The canonical type of this type. A QualType. 1048 QualType CanonicalType; 1049 1050 friend class QualType; 1051 friend class Type; 1052 friend class ExtQuals; 1053}; 1054 1055/// ExtQuals - We can encode up to four bits in the low bits of a 1056/// type pointer, but there are many more type qualifiers that we want 1057/// to be able to apply to an arbitrary type. Therefore we have this 1058/// struct, intended to be heap-allocated and used by QualType to 1059/// store qualifiers. 1060/// 1061/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 1062/// in three low bits on the QualType pointer; a fourth bit records whether 1063/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 1064/// Objective-C GC attributes) are much more rare. 1065class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 1066 // NOTE: changing the fast qualifiers should be straightforward as 1067 // long as you don't make 'const' non-fast. 1068 // 1. Qualifiers: 1069 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 1070 // Fast qualifiers must occupy the low-order bits. 1071 // b) Update Qualifiers::FastWidth and FastMask. 1072 // 2. QualType: 1073 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 1074 // b) Update remove{Volatile,Restrict}, defined near the end of 1075 // this header. 1076 // 3. ASTContext: 1077 // a) Update get{Volatile,Restrict}Type. 1078 1079 /// Quals - the immutable set of qualifiers applied by this 1080 /// node; always contains extended qualifiers. 1081 Qualifiers Quals; 1082 1083 ExtQuals *this_() { return this; } 1084 1085public: 1086 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) 1087 : ExtQualsTypeCommonBase(baseType, 1088 canon.isNull() ? QualType(this_(), 0) : canon), 1089 Quals(quals) 1090 { 1091 assert(Quals.hasNonFastQualifiers() 1092 && "ExtQuals created with no fast qualifiers"); 1093 assert(!Quals.hasFastQualifiers() 1094 && "ExtQuals created with fast qualifiers"); 1095 } 1096 1097 Qualifiers getQualifiers() const { return Quals; } 1098 1099 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 1100 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 1101 1102 bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } 1103 Qualifiers::ObjCLifetime getObjCLifetime() const { 1104 return Quals.getObjCLifetime(); 1105 } 1106 1107 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 1108 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 1109 1110 const Type *getBaseType() const { return BaseType; } 1111 1112public: 1113 void Profile(llvm::FoldingSetNodeID &ID) const { 1114 Profile(ID, getBaseType(), Quals); 1115 } 1116 static void Profile(llvm::FoldingSetNodeID &ID, 1117 const Type *BaseType, 1118 Qualifiers Quals) { 1119 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 1120 ID.AddPointer(BaseType); 1121 Quals.Profile(ID); 1122 } 1123}; 1124 1125/// \brief The kind of C++0x ref-qualifier associated with a function type, 1126/// which determines whether a member function's "this" object can be an 1127/// lvalue, rvalue, or neither. 1128enum RefQualifierKind { 1129 /// \brief No ref-qualifier was provided. 1130 RQ_None = 0, 1131 /// \brief An lvalue ref-qualifier was provided (\c &). 1132 RQ_LValue, 1133 /// \brief An rvalue ref-qualifier was provided (\c &&). 1134 RQ_RValue 1135}; 1136 1137/// Type - This is the base class of the type hierarchy. A central concept 1138/// with types is that each type always has a canonical type. A canonical type 1139/// is the type with any typedef names stripped out of it or the types it 1140/// references. For example, consider: 1141/// 1142/// typedef int foo; 1143/// typedef foo* bar; 1144/// 'int *' 'foo *' 'bar' 1145/// 1146/// There will be a Type object created for 'int'. Since int is canonical, its 1147/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 1148/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 1149/// there is a PointerType that represents 'int*', which, like 'int', is 1150/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 1151/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 1152/// is also 'int*'. 1153/// 1154/// Non-canonical types are useful for emitting diagnostics, without losing 1155/// information about typedefs being used. Canonical types are useful for type 1156/// comparisons (they allow by-pointer equality tests) and useful for reasoning 1157/// about whether something has a particular form (e.g. is a function type), 1158/// because they implicitly, recursively, strip all typedefs out of a type. 1159/// 1160/// Types, once created, are immutable. 1161/// 1162class Type : public ExtQualsTypeCommonBase { 1163public: 1164 enum TypeClass { 1165#define TYPE(Class, Base) Class, 1166#define LAST_TYPE(Class) TypeLast = Class, 1167#define ABSTRACT_TYPE(Class, Base) 1168#include "clang/AST/TypeNodes.def" 1169 TagFirst = Record, TagLast = Enum 1170 }; 1171 1172private: 1173 Type(const Type &) LLVM_DELETED_FUNCTION; 1174 void operator=(const Type &) LLVM_DELETED_FUNCTION; 1175 1176 /// Bitfields required by the Type class. 1177 class TypeBitfields { 1178 friend class Type; 1179 template <class T> friend class TypePropertyCache; 1180 1181 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 1182 unsigned TC : 8; 1183 1184 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 1185 unsigned Dependent : 1; 1186 1187 /// \brief Whether this type somehow involves a template parameter, even 1188 /// if the resolution of the type does not depend on a template parameter. 1189 unsigned InstantiationDependent : 1; 1190 1191 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1192 unsigned VariablyModified : 1; 1193 1194 /// \brief Whether this type contains an unexpanded parameter pack 1195 /// (for C++0x variadic templates). 1196 unsigned ContainsUnexpandedParameterPack : 1; 1197 1198 /// \brief Nonzero if the cache (i.e. the bitfields here starting 1199 /// with 'Cache') is valid. If so, then this is a 1200 /// LangOptions::VisibilityMode+1. 1201 mutable unsigned CacheValidAndVisibility : 2; 1202 1203 /// \brief True if the visibility was set explicitly in the source code. 1204 mutable unsigned CachedExplicitVisibility : 1; 1205 1206 /// \brief Linkage of this type. 1207 mutable unsigned CachedLinkage : 2; 1208 1209 /// \brief Whether this type involves and local or unnamed types. 1210 mutable unsigned CachedLocalOrUnnamed : 1; 1211 1212 /// \brief FromAST - Whether this type comes from an AST file. 1213 mutable unsigned FromAST : 1; 1214 1215 bool isCacheValid() const { 1216 return (CacheValidAndVisibility != 0); 1217 } 1218 Visibility getVisibility() const { 1219 assert(isCacheValid() && "getting linkage from invalid cache"); 1220 return static_cast<Visibility>(CacheValidAndVisibility-1); 1221 } 1222 bool isVisibilityExplicit() const { 1223 assert(isCacheValid() && "getting linkage from invalid cache"); 1224 return CachedExplicitVisibility; 1225 } 1226 Linkage getLinkage() const { 1227 assert(isCacheValid() && "getting linkage from invalid cache"); 1228 return static_cast<Linkage>(CachedLinkage); 1229 } 1230 bool hasLocalOrUnnamedType() const { 1231 assert(isCacheValid() && "getting linkage from invalid cache"); 1232 return CachedLocalOrUnnamed; 1233 } 1234 }; 1235 enum { NumTypeBits = 19 }; 1236 1237protected: 1238 // These classes allow subclasses to somewhat cleanly pack bitfields 1239 // into Type. 1240 1241 class ArrayTypeBitfields { 1242 friend class ArrayType; 1243 1244 unsigned : NumTypeBits; 1245 1246 /// IndexTypeQuals - CVR qualifiers from declarations like 1247 /// 'int X[static restrict 4]'. For function parameters only. 1248 unsigned IndexTypeQuals : 3; 1249 1250 /// SizeModifier - storage class qualifiers from declarations like 1251 /// 'int X[static restrict 4]'. For function parameters only. 1252 /// Actually an ArrayType::ArraySizeModifier. 1253 unsigned SizeModifier : 3; 1254 }; 1255 1256 class BuiltinTypeBitfields { 1257 friend class BuiltinType; 1258 1259 unsigned : NumTypeBits; 1260 1261 /// The kind (BuiltinType::Kind) of builtin type this is. 1262 unsigned Kind : 8; 1263 }; 1264 1265 class FunctionTypeBitfields { 1266 friend class FunctionType; 1267 1268 unsigned : NumTypeBits; 1269 1270 /// Extra information which affects how the function is called, like 1271 /// regparm and the calling convention. 1272 unsigned ExtInfo : 8; 1273 1274 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 1275 /// other bitfields. 1276 /// The qualifiers are part of FunctionProtoType because... 1277 /// 1278 /// C++ 8.3.5p4: The return type, the parameter type list and the 1279 /// cv-qualifier-seq, [...], are part of the function type. 1280 unsigned TypeQuals : 3; 1281 1282 /// \brief The ref-qualifier associated with a \c FunctionProtoType. 1283 /// 1284 /// This is a value of type \c RefQualifierKind. 1285 unsigned RefQualifier : 2; 1286 }; 1287 1288 class ObjCObjectTypeBitfields { 1289 friend class ObjCObjectType; 1290 1291 unsigned : NumTypeBits; 1292 1293 /// NumProtocols - The number of protocols stored directly on this 1294 /// object type. 1295 unsigned NumProtocols : 32 - NumTypeBits; 1296 }; 1297 1298 class ReferenceTypeBitfields { 1299 friend class ReferenceType; 1300 1301 unsigned : NumTypeBits; 1302 1303 /// True if the type was originally spelled with an lvalue sigil. 1304 /// This is never true of rvalue references but can also be false 1305 /// on lvalue references because of C++0x [dcl.typedef]p9, 1306 /// as follows: 1307 /// 1308 /// typedef int &ref; // lvalue, spelled lvalue 1309 /// typedef int &&rvref; // rvalue 1310 /// ref &a; // lvalue, inner ref, spelled lvalue 1311 /// ref &&a; // lvalue, inner ref 1312 /// rvref &a; // lvalue, inner ref, spelled lvalue 1313 /// rvref &&a; // rvalue, inner ref 1314 unsigned SpelledAsLValue : 1; 1315 1316 /// True if the inner type is a reference type. This only happens 1317 /// in non-canonical forms. 1318 unsigned InnerRef : 1; 1319 }; 1320 1321 class TypeWithKeywordBitfields { 1322 friend class TypeWithKeyword; 1323 1324 unsigned : NumTypeBits; 1325 1326 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 1327 unsigned Keyword : 8; 1328 }; 1329 1330 class VectorTypeBitfields { 1331 friend class VectorType; 1332 1333 unsigned : NumTypeBits; 1334 1335 /// VecKind - The kind of vector, either a generic vector type or some 1336 /// target-specific vector type such as for AltiVec or Neon. 1337 unsigned VecKind : 3; 1338 1339 /// NumElements - The number of elements in the vector. 1340 unsigned NumElements : 29 - NumTypeBits; 1341 }; 1342 1343 class AttributedTypeBitfields { 1344 friend class AttributedType; 1345 1346 unsigned : NumTypeBits; 1347 1348 /// AttrKind - an AttributedType::Kind 1349 unsigned AttrKind : 32 - NumTypeBits; 1350 }; 1351 1352 union { 1353 TypeBitfields TypeBits; 1354 ArrayTypeBitfields ArrayTypeBits; 1355 AttributedTypeBitfields AttributedTypeBits; 1356 BuiltinTypeBitfields BuiltinTypeBits; 1357 FunctionTypeBitfields FunctionTypeBits; 1358 ObjCObjectTypeBitfields ObjCObjectTypeBits; 1359 ReferenceTypeBitfields ReferenceTypeBits; 1360 TypeWithKeywordBitfields TypeWithKeywordBits; 1361 VectorTypeBitfields VectorTypeBits; 1362 }; 1363 1364private: 1365 /// \brief Set whether this type comes from an AST file. 1366 void setFromAST(bool V = true) const { 1367 TypeBits.FromAST = V; 1368 } 1369 1370 template <class T> friend class TypePropertyCache; 1371 1372protected: 1373 // silence VC++ warning C4355: 'this' : used in base member initializer list 1374 Type *this_() { return this; } 1375 Type(TypeClass tc, QualType canon, bool Dependent, 1376 bool InstantiationDependent, bool VariablyModified, 1377 bool ContainsUnexpandedParameterPack) 1378 : ExtQualsTypeCommonBase(this, 1379 canon.isNull() ? QualType(this_(), 0) : canon) { 1380 TypeBits.TC = tc; 1381 TypeBits.Dependent = Dependent; 1382 TypeBits.InstantiationDependent = Dependent || InstantiationDependent; 1383 TypeBits.VariablyModified = VariablyModified; 1384 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; 1385 TypeBits.CacheValidAndVisibility = 0; 1386 TypeBits.CachedExplicitVisibility = false; 1387 TypeBits.CachedLocalOrUnnamed = false; 1388 TypeBits.CachedLinkage = NoLinkage; 1389 TypeBits.FromAST = false; 1390 } 1391 friend class ASTContext; 1392 1393 void setDependent(bool D = true) { 1394 TypeBits.Dependent = D; 1395 if (D) 1396 TypeBits.InstantiationDependent = true; 1397 } 1398 void setInstantiationDependent(bool D = true) { 1399 TypeBits.InstantiationDependent = D; } 1400 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; 1401 } 1402 void setContainsUnexpandedParameterPack(bool PP = true) { 1403 TypeBits.ContainsUnexpandedParameterPack = PP; 1404 } 1405 1406public: 1407 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1408 1409 /// \brief Whether this type comes from an AST file. 1410 bool isFromAST() const { return TypeBits.FromAST; } 1411 1412 /// \brief Whether this type is or contains an unexpanded parameter 1413 /// pack, used to support C++0x variadic templates. 1414 /// 1415 /// A type that contains a parameter pack shall be expanded by the 1416 /// ellipsis operator at some point. For example, the typedef in the 1417 /// following example contains an unexpanded parameter pack 'T': 1418 /// 1419 /// \code 1420 /// template<typename ...T> 1421 /// struct X { 1422 /// typedef T* pointer_types; // ill-formed; T is a parameter pack. 1423 /// }; 1424 /// \endcode 1425 /// 1426 /// Note that this routine does not specify which 1427 bool containsUnexpandedParameterPack() const { 1428 return TypeBits.ContainsUnexpandedParameterPack; 1429 } 1430 1431 /// Determines if this type would be canonical if it had no further 1432 /// qualification. 1433 bool isCanonicalUnqualified() const { 1434 return CanonicalType == QualType(this, 0); 1435 } 1436 1437 /// Pull a single level of sugar off of this locally-unqualified type. 1438 /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() 1439 /// or QualType::getSingleStepDesugaredType(const ASTContext&). 1440 QualType getLocallyUnqualifiedSingleStepDesugaredType() const; 1441 1442 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1443 /// object types, function types, and incomplete types. 1444 1445 /// isIncompleteType - Return true if this is an incomplete type. 1446 /// A type that can describe objects, but which lacks information needed to 1447 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1448 /// routine will need to determine if the size is actually required. 1449 /// 1450 /// \brief Def If non-NULL, and the type refers to some kind of declaration 1451 /// that can be completed (such as a C struct, C++ class, or Objective-C 1452 /// class), will be set to the declaration. 1453 bool isIncompleteType(NamedDecl **Def = 0) const; 1454 1455 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1456 /// type, in other words, not a function type. 1457 bool isIncompleteOrObjectType() const { 1458 return !isFunctionType(); 1459 } 1460 1461 /// \brief Determine whether this type is an object type. 1462 bool isObjectType() const { 1463 // C++ [basic.types]p8: 1464 // An object type is a (possibly cv-qualified) type that is not a 1465 // function type, not a reference type, and not a void type. 1466 return !isReferenceType() && !isFunctionType() && !isVoidType(); 1467 } 1468 1469 /// isLiteralType - Return true if this is a literal type 1470 /// (C++0x [basic.types]p10) 1471 bool isLiteralType() const; 1472 1473 /// \brief Test if this type is a standard-layout type. 1474 /// (C++0x [basic.type]p9) 1475 bool isStandardLayoutType() const; 1476 1477 /// Helper methods to distinguish type categories. All type predicates 1478 /// operate on the canonical type, ignoring typedefs and qualifiers. 1479 1480 /// isBuiltinType - returns true if the type is a builtin type. 1481 bool isBuiltinType() const; 1482 1483 /// isSpecificBuiltinType - Test for a particular builtin type. 1484 bool isSpecificBuiltinType(unsigned K) const; 1485 1486 /// isPlaceholderType - Test for a type which does not represent an 1487 /// actual type-system type but is instead used as a placeholder for 1488 /// various convenient purposes within Clang. All such types are 1489 /// BuiltinTypes. 1490 bool isPlaceholderType() const; 1491 const BuiltinType *getAsPlaceholderType() const; 1492 1493 /// isSpecificPlaceholderType - Test for a specific placeholder type. 1494 bool isSpecificPlaceholderType(unsigned K) const; 1495 1496 /// isNonOverloadPlaceholderType - Test for a placeholder type 1497 /// other than Overload; see BuiltinType::isNonOverloadPlaceholderType. 1498 bool isNonOverloadPlaceholderType() const; 1499 1500 /// isIntegerType() does *not* include complex integers (a GCC extension). 1501 /// isComplexIntegerType() can be used to test for complex integers. 1502 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1503 bool isEnumeralType() const; 1504 bool isBooleanType() const; 1505 bool isCharType() const; 1506 bool isWideCharType() const; 1507 bool isChar16Type() const; 1508 bool isChar32Type() const; 1509 bool isAnyCharacterType() const; 1510 bool isIntegralType(ASTContext &Ctx) const; 1511 1512 /// \brief Determine whether this type is an integral or enumeration type. 1513 bool isIntegralOrEnumerationType() const; 1514 /// \brief Determine whether this type is an integral or unscoped enumeration 1515 /// type. 1516 bool isIntegralOrUnscopedEnumerationType() const; 1517 1518 /// Floating point categories. 1519 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1520 /// isComplexType() does *not* include complex integers (a GCC extension). 1521 /// isComplexIntegerType() can be used to test for complex integers. 1522 bool isComplexType() const; // C99 6.2.5p11 (complex) 1523 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1524 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1525 bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) 1526 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1527 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1528 bool isVoidType() const; // C99 6.2.5p19 1529 bool isDerivedType() const; // C99 6.2.5p20 1530 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1531 bool isAggregateType() const; 1532 bool isFundamentalType() const; 1533 bool isCompoundType() const; 1534 1535 // Type Predicates: Check to see if this type is structurally the specified 1536 // type, ignoring typedefs and qualifiers. 1537 bool isFunctionType() const; 1538 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1539 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1540 bool isPointerType() const; 1541 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1542 bool isBlockPointerType() const; 1543 bool isVoidPointerType() const; 1544 bool isReferenceType() const; 1545 bool isLValueReferenceType() const; 1546 bool isRValueReferenceType() const; 1547 bool isFunctionPointerType() const; 1548 bool isMemberPointerType() const; 1549 bool isMemberFunctionPointerType() const; 1550 bool isMemberDataPointerType() const; 1551 bool isArrayType() const; 1552 bool isConstantArrayType() const; 1553 bool isIncompleteArrayType() const; 1554 bool isVariableArrayType() const; 1555 bool isDependentSizedArrayType() const; 1556 bool isRecordType() const; 1557 bool isClassType() const; 1558 bool isStructureType() const; 1559 bool isInterfaceType() const; 1560 bool isStructureOrClassType() const; 1561 bool isUnionType() const; 1562 bool isComplexIntegerType() const; // GCC _Complex integer type. 1563 bool isVectorType() const; // GCC vector type. 1564 bool isExtVectorType() const; // Extended vector type. 1565 bool isObjCObjectPointerType() const; // pointer to ObjC object 1566 bool isObjCRetainableType() const; // ObjC object or block pointer 1567 bool isObjCLifetimeType() const; // (array of)* retainable type 1568 bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type 1569 bool isObjCNSObjectType() const; // __attribute__((NSObject)) 1570 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1571 // for the common case. 1572 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1573 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1574 bool isObjCQualifiedIdType() const; // id<foo> 1575 bool isObjCQualifiedClassType() const; // Class<foo> 1576 bool isObjCObjectOrInterfaceType() const; 1577 bool isObjCIdType() const; // id 1578 bool isObjCClassType() const; // Class 1579 bool isObjCSelType() const; // Class 1580 bool isObjCBuiltinType() const; // 'id' or 'Class' 1581 bool isObjCARCBridgableType() const; 1582 bool isCARCBridgableType() const; 1583 bool isTemplateTypeParmType() const; // C++ template type parameter 1584 bool isNullPtrType() const; // C++0x nullptr_t 1585 bool isAtomicType() const; // C11 _Atomic() 1586 1587 /// Determines if this type, which must satisfy 1588 /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather 1589 /// than implicitly __strong. 1590 bool isObjCARCImplicitlyUnretainedType() const; 1591 1592 /// Return the implicit lifetime for this type, which must not be dependent. 1593 Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; 1594 1595 enum ScalarTypeKind { 1596 STK_CPointer, 1597 STK_BlockPointer, 1598 STK_ObjCObjectPointer, 1599 STK_MemberPointer, 1600 STK_Bool, 1601 STK_Integral, 1602 STK_Floating, 1603 STK_IntegralComplex, 1604 STK_FloatingComplex 1605 }; 1606 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1607 ScalarTypeKind getScalarTypeKind() const; 1608 1609 /// isDependentType - Whether this type is a dependent type, meaning 1610 /// that its definition somehow depends on a template parameter 1611 /// (C++ [temp.dep.type]). 1612 bool isDependentType() const { return TypeBits.Dependent; } 1613 1614 /// \brief Determine whether this type is an instantiation-dependent type, 1615 /// meaning that the type involves a template parameter (even if the 1616 /// definition does not actually depend on the type substituted for that 1617 /// template parameter). 1618 bool isInstantiationDependentType() const { 1619 return TypeBits.InstantiationDependent; 1620 } 1621 1622 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1623 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1624 1625 /// \brief Whether this type involves a variable-length array type 1626 /// with a definite size. 1627 bool hasSizedVLAType() const; 1628 1629 /// \brief Whether this type is or contains a local or unnamed type. 1630 bool hasUnnamedOrLocalType() const; 1631 1632 bool isOverloadableType() const; 1633 1634 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1635 bool isElaboratedTypeSpecifier() const; 1636 1637 bool canDecayToPointerType() const; 1638 1639 /// hasPointerRepresentation - Whether this type is represented 1640 /// natively as a pointer; this includes pointers, references, block 1641 /// pointers, and Objective-C interface, qualified id, and qualified 1642 /// interface types, as well as nullptr_t. 1643 bool hasPointerRepresentation() const; 1644 1645 /// hasObjCPointerRepresentation - Whether this type can represent 1646 /// an objective pointer type for the purpose of GC'ability 1647 bool hasObjCPointerRepresentation() const; 1648 1649 /// \brief Determine whether this type has an integer representation 1650 /// of some sort, e.g., it is an integer type or a vector. 1651 bool hasIntegerRepresentation() const; 1652 1653 /// \brief Determine whether this type has an signed integer representation 1654 /// of some sort, e.g., it is an signed integer type or a vector. 1655 bool hasSignedIntegerRepresentation() const; 1656 1657 /// \brief Determine whether this type has an unsigned integer representation 1658 /// of some sort, e.g., it is an unsigned integer type or a vector. 1659 bool hasUnsignedIntegerRepresentation() const; 1660 1661 /// \brief Determine whether this type has a floating-point representation 1662 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1663 bool hasFloatingRepresentation() const; 1664 1665 // Type Checking Functions: Check to see if this type is structurally the 1666 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1667 // the best type we can. 1668 const RecordType *getAsStructureType() const; 1669 /// NOTE: getAs*ArrayType are methods on ASTContext. 1670 const RecordType *getAsUnionType() const; 1671 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1672 // The following is a convenience method that returns an ObjCObjectPointerType 1673 // for object declared using an interface. 1674 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1675 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1676 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; 1677 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1678 1679 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1680 /// because the type is a RecordType or because it is the injected-class-name 1681 /// type of a class template or class template partial specialization. 1682 CXXRecordDecl *getAsCXXRecordDecl() const; 1683 1684 /// If this is a pointer or reference to a RecordType, return the 1685 /// CXXRecordDecl that that type refers to. 1686 /// 1687 /// If this is not a pointer or reference, or the type being pointed to does 1688 /// not refer to a CXXRecordDecl, returns NULL. 1689 const CXXRecordDecl *getPointeeCXXRecordDecl() const; 1690 1691 /// \brief Get the AutoType whose type will be deduced for a variable with 1692 /// an initializer of this type. This looks through declarators like pointer 1693 /// types, but not through decltype or typedefs. 1694 AutoType *getContainedAutoType() const; 1695 1696 /// Member-template getAs<specific type>'. Look through sugar for 1697 /// an instance of \<specific type>. This scheme will eventually 1698 /// replace the specific getAsXXXX methods above. 1699 /// 1700 /// There are some specializations of this member template listed 1701 /// immediately following this class. 1702 template <typename T> const T *getAs() const; 1703 1704 /// A variant of getAs<> for array types which silently discards 1705 /// qualifiers from the outermost type. 1706 const ArrayType *getAsArrayTypeUnsafe() const; 1707 1708 /// Member-template castAs<specific type>. Look through sugar for 1709 /// the underlying instance of \<specific type>. 1710 /// 1711 /// This method has the same relationship to getAs<T> as cast<T> has 1712 /// to dyn_cast<T>; which is to say, the underlying type *must* 1713 /// have the intended type, and this method will never return null. 1714 template <typename T> const T *castAs() const; 1715 1716 /// A variant of castAs<> for array type which silently discards 1717 /// qualifiers from the outermost type. 1718 const ArrayType *castAsArrayTypeUnsafe() const; 1719 1720 /// getBaseElementTypeUnsafe - Get the base element type of this 1721 /// type, potentially discarding type qualifiers. This method 1722 /// should never be used when type qualifiers are meaningful. 1723 const Type *getBaseElementTypeUnsafe() const; 1724 1725 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1726 /// element type of the array, potentially with type qualifiers missing. 1727 /// This method should never be used when type qualifiers are meaningful. 1728 const Type *getArrayElementTypeNoTypeQual() const; 1729 1730 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1731 /// pointer, this returns the respective pointee. 1732 QualType getPointeeType() const; 1733 1734 /// getUnqualifiedDesugaredType() - Return the specified type with 1735 /// any "sugar" removed from the type, removing any typedefs, 1736 /// typeofs, etc., as well as any qualifiers. 1737 const Type *getUnqualifiedDesugaredType() const; 1738 1739 /// More type predicates useful for type checking/promotion 1740 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1741 1742 /// isSignedIntegerType - Return true if this is an integer type that is 1743 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1744 /// or an enum decl which has a signed representation. 1745 bool isSignedIntegerType() const; 1746 1747 /// isUnsignedIntegerType - Return true if this is an integer type that is 1748 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], 1749 /// or an enum decl which has an unsigned representation. 1750 bool isUnsignedIntegerType() const; 1751 1752 /// Determines whether this is an integer type that is signed or an 1753 /// enumeration types whose underlying type is a signed integer type. 1754 bool isSignedIntegerOrEnumerationType() const; 1755 1756 /// Determines whether this is an integer type that is unsigned or an 1757 /// enumeration types whose underlying type is a unsigned integer type. 1758 bool isUnsignedIntegerOrEnumerationType() const; 1759 1760 /// isConstantSizeType - Return true if this is not a variable sized type, 1761 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1762 /// incomplete types. 1763 bool isConstantSizeType() const; 1764 1765 /// isSpecifierType - Returns true if this type can be represented by some 1766 /// set of type specifiers. 1767 bool isSpecifierType() const; 1768 1769 /// \brief Determine the linkage of this type. 1770 Linkage getLinkage() const; 1771 1772 /// \brief Determine the visibility of this type. 1773 Visibility getVisibility() const; 1774 1775 /// \brief Return true if the visibility was explicitly set is the code. 1776 bool isVisibilityExplicit() const; 1777 1778 /// \brief Determine the linkage and visibility of this type. 1779 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1780 1781 /// \brief Note that the linkage is no longer known. 1782 void ClearLinkageCache(); 1783 1784 const char *getTypeClassName() const; 1785 1786 QualType getCanonicalTypeInternal() const { 1787 return CanonicalType; 1788 } 1789 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1790 LLVM_ATTRIBUTE_USED void dump() const; 1791 1792 friend class ASTReader; 1793 friend class ASTWriter; 1794}; 1795 1796/// \brief This will check for a TypedefType by removing any existing sugar 1797/// until it reaches a TypedefType or a non-sugared type. 1798template <> const TypedefType *Type::getAs() const; 1799 1800/// \brief This will check for a TemplateSpecializationType by removing any 1801/// existing sugar until it reaches a TemplateSpecializationType or a 1802/// non-sugared type. 1803template <> const TemplateSpecializationType *Type::getAs() const; 1804 1805// We can do canonical leaf types faster, because we don't have to 1806// worry about preserving child type decoration. 1807#define TYPE(Class, Base) 1808#define LEAF_TYPE(Class) \ 1809template <> inline const Class##Type *Type::getAs() const { \ 1810 return dyn_cast<Class##Type>(CanonicalType); \ 1811} \ 1812template <> inline const Class##Type *Type::castAs() const { \ 1813 return cast<Class##Type>(CanonicalType); \ 1814} 1815#include "clang/AST/TypeNodes.def" 1816 1817 1818/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1819/// types are always canonical and have a literal name field. 1820class BuiltinType : public Type { 1821public: 1822 enum Kind { 1823#define BUILTIN_TYPE(Id, SingletonId) Id, 1824#define LAST_BUILTIN_TYPE(Id) LastKind = Id 1825#include "clang/AST/BuiltinTypes.def" 1826 }; 1827 1828public: 1829 BuiltinType(Kind K) 1830 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1831 /*InstantiationDependent=*/(K == Dependent), 1832 /*VariablyModified=*/false, 1833 /*Unexpanded paramter pack=*/false) { 1834 BuiltinTypeBits.Kind = K; 1835 } 1836 1837 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1838 StringRef getName(const PrintingPolicy &Policy) const; 1839 const char *getNameAsCString(const PrintingPolicy &Policy) const { 1840 // The StringRef is null-terminated. 1841 StringRef str = getName(Policy); 1842 assert(!str.empty() && str.data()[str.size()] == '\0'); 1843 return str.data(); 1844 } 1845 1846 bool isSugared() const { return false; } 1847 QualType desugar() const { return QualType(this, 0); } 1848 1849 bool isInteger() const { 1850 return getKind() >= Bool && getKind() <= Int128; 1851 } 1852 1853 bool isSignedInteger() const { 1854 return getKind() >= Char_S && getKind() <= Int128; 1855 } 1856 1857 bool isUnsignedInteger() const { 1858 return getKind() >= Bool && getKind() <= UInt128; 1859 } 1860 1861 bool isFloatingPoint() const { 1862 return getKind() >= Half && getKind() <= LongDouble; 1863 } 1864 1865 /// Determines whether the given kind corresponds to a placeholder type. 1866 static bool isPlaceholderTypeKind(Kind K) { 1867 return K >= Overload; 1868 } 1869 1870 /// Determines whether this type is a placeholder type, i.e. a type 1871 /// which cannot appear in arbitrary positions in a fully-formed 1872 /// expression. 1873 bool isPlaceholderType() const { 1874 return isPlaceholderTypeKind(getKind()); 1875 } 1876 1877 /// Determines whether this type is a placeholder type other than 1878 /// Overload. Most placeholder types require only syntactic 1879 /// information about their context in order to be resolved (e.g. 1880 /// whether it is a call expression), which means they can (and 1881 /// should) be resolved in an earlier "phase" of analysis. 1882 /// Overload expressions sometimes pick up further information 1883 /// from their context, like whether the context expects a 1884 /// specific function-pointer type, and so frequently need 1885 /// special treatment. 1886 bool isNonOverloadPlaceholderType() const { 1887 return getKind() > Overload; 1888 } 1889 1890 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1891}; 1892 1893/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1894/// types (_Complex float etc) as well as the GCC integer complex extensions. 1895/// 1896class ComplexType : public Type, public llvm::FoldingSetNode { 1897 QualType ElementType; 1898 ComplexType(QualType Element, QualType CanonicalPtr) : 1899 Type(Complex, CanonicalPtr, Element->isDependentType(), 1900 Element->isInstantiationDependentType(), 1901 Element->isVariablyModifiedType(), 1902 Element->containsUnexpandedParameterPack()), 1903 ElementType(Element) { 1904 } 1905 friend class ASTContext; // ASTContext creates these. 1906 1907public: 1908 QualType getElementType() const { return ElementType; } 1909 1910 bool isSugared() const { return false; } 1911 QualType desugar() const { return QualType(this, 0); } 1912 1913 void Profile(llvm::FoldingSetNodeID &ID) { 1914 Profile(ID, getElementType()); 1915 } 1916 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1917 ID.AddPointer(Element.getAsOpaquePtr()); 1918 } 1919 1920 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1921}; 1922 1923/// ParenType - Sugar for parentheses used when specifying types. 1924/// 1925class ParenType : public Type, public llvm::FoldingSetNode { 1926 QualType Inner; 1927 1928 ParenType(QualType InnerType, QualType CanonType) : 1929 Type(Paren, CanonType, InnerType->isDependentType(), 1930 InnerType->isInstantiationDependentType(), 1931 InnerType->isVariablyModifiedType(), 1932 InnerType->containsUnexpandedParameterPack()), 1933 Inner(InnerType) { 1934 } 1935 friend class ASTContext; // ASTContext creates these. 1936 1937public: 1938 1939 QualType getInnerType() const { return Inner; } 1940 1941 bool isSugared() const { return true; } 1942 QualType desugar() const { return getInnerType(); } 1943 1944 void Profile(llvm::FoldingSetNodeID &ID) { 1945 Profile(ID, getInnerType()); 1946 } 1947 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1948 Inner.Profile(ID); 1949 } 1950 1951 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1952}; 1953 1954/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1955/// 1956class PointerType : public Type, public llvm::FoldingSetNode { 1957 QualType PointeeType; 1958 1959 PointerType(QualType Pointee, QualType CanonicalPtr) : 1960 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1961 Pointee->isInstantiationDependentType(), 1962 Pointee->isVariablyModifiedType(), 1963 Pointee->containsUnexpandedParameterPack()), 1964 PointeeType(Pointee) { 1965 } 1966 friend class ASTContext; // ASTContext creates these. 1967 1968public: 1969 1970 QualType getPointeeType() const { return PointeeType; } 1971 1972 bool isSugared() const { return false; } 1973 QualType desugar() const { return QualType(this, 0); } 1974 1975 void Profile(llvm::FoldingSetNodeID &ID) { 1976 Profile(ID, getPointeeType()); 1977 } 1978 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1979 ID.AddPointer(Pointee.getAsOpaquePtr()); 1980 } 1981 1982 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1983}; 1984 1985/// BlockPointerType - pointer to a block type. 1986/// This type is to represent types syntactically represented as 1987/// "void (^)(int)", etc. Pointee is required to always be a function type. 1988/// 1989class BlockPointerType : public Type, public llvm::FoldingSetNode { 1990 QualType PointeeType; // Block is some kind of pointer type 1991 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1992 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1993 Pointee->isInstantiationDependentType(), 1994 Pointee->isVariablyModifiedType(), 1995 Pointee->containsUnexpandedParameterPack()), 1996 PointeeType(Pointee) { 1997 } 1998 friend class ASTContext; // ASTContext creates these. 1999 2000public: 2001 2002 // Get the pointee type. Pointee is required to always be a function type. 2003 QualType getPointeeType() const { return PointeeType; } 2004 2005 bool isSugared() const { return false; } 2006 QualType desugar() const { return QualType(this, 0); } 2007 2008 void Profile(llvm::FoldingSetNodeID &ID) { 2009 Profile(ID, getPointeeType()); 2010 } 2011 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 2012 ID.AddPointer(Pointee.getAsOpaquePtr()); 2013 } 2014 2015 static bool classof(const Type *T) { 2016 return T->getTypeClass() == BlockPointer; 2017 } 2018}; 2019 2020/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 2021/// 2022class ReferenceType : public Type, public llvm::FoldingSetNode { 2023 QualType PointeeType; 2024 2025protected: 2026 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 2027 bool SpelledAsLValue) : 2028 Type(tc, CanonicalRef, Referencee->isDependentType(), 2029 Referencee->isInstantiationDependentType(), 2030 Referencee->isVariablyModifiedType(), 2031 Referencee->containsUnexpandedParameterPack()), 2032 PointeeType(Referencee) 2033 { 2034 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 2035 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 2036 } 2037 2038public: 2039 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 2040 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 2041 2042 QualType getPointeeTypeAsWritten() const { return PointeeType; } 2043 QualType getPointeeType() const { 2044 // FIXME: this might strip inner qualifiers; okay? 2045 const ReferenceType *T = this; 2046 while (T->isInnerRef()) 2047 T = T->PointeeType->castAs<ReferenceType>(); 2048 return T->PointeeType; 2049 } 2050 2051 void Profile(llvm::FoldingSetNodeID &ID) { 2052 Profile(ID, PointeeType, isSpelledAsLValue()); 2053 } 2054 static void Profile(llvm::FoldingSetNodeID &ID, 2055 QualType Referencee, 2056 bool SpelledAsLValue) { 2057 ID.AddPointer(Referencee.getAsOpaquePtr()); 2058 ID.AddBoolean(SpelledAsLValue); 2059 } 2060 2061 static bool classof(const Type *T) { 2062 return T->getTypeClass() == LValueReference || 2063 T->getTypeClass() == RValueReference; 2064 } 2065}; 2066 2067/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 2068/// 2069class LValueReferenceType : public ReferenceType { 2070 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 2071 bool SpelledAsLValue) : 2072 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 2073 {} 2074 friend class ASTContext; // ASTContext creates these 2075public: 2076 bool isSugared() const { return false; } 2077 QualType desugar() const { return QualType(this, 0); } 2078 2079 static bool classof(const Type *T) { 2080 return T->getTypeClass() == LValueReference; 2081 } 2082}; 2083 2084/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 2085/// 2086class RValueReferenceType : public ReferenceType { 2087 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 2088 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 2089 } 2090 friend class ASTContext; // ASTContext creates these 2091public: 2092 bool isSugared() const { return false; } 2093 QualType desugar() const { return QualType(this, 0); } 2094 2095 static bool classof(const Type *T) { 2096 return T->getTypeClass() == RValueReference; 2097 } 2098}; 2099 2100/// MemberPointerType - C++ 8.3.3 - Pointers to members 2101/// 2102class MemberPointerType : public Type, public llvm::FoldingSetNode { 2103 QualType PointeeType; 2104 /// The class of which the pointee is a member. Must ultimately be a 2105 /// RecordType, but could be a typedef or a template parameter too. 2106 const Type *Class; 2107 2108 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 2109 Type(MemberPointer, CanonicalPtr, 2110 Cls->isDependentType() || Pointee->isDependentType(), 2111 (Cls->isInstantiationDependentType() || 2112 Pointee->isInstantiationDependentType()), 2113 Pointee->isVariablyModifiedType(), 2114 (Cls->containsUnexpandedParameterPack() || 2115 Pointee->containsUnexpandedParameterPack())), 2116 PointeeType(Pointee), Class(Cls) { 2117 } 2118 friend class ASTContext; // ASTContext creates these. 2119 2120public: 2121 QualType getPointeeType() const { return PointeeType; } 2122 2123 /// Returns true if the member type (i.e. the pointee type) is a 2124 /// function type rather than a data-member type. 2125 bool isMemberFunctionPointer() const { 2126 return PointeeType->isFunctionProtoType(); 2127 } 2128 2129 /// Returns true if the member type (i.e. the pointee type) is a 2130 /// data type rather than a function type. 2131 bool isMemberDataPointer() const { 2132 return !PointeeType->isFunctionProtoType(); 2133 } 2134 2135 const Type *getClass() const { return Class; } 2136 2137 bool isSugared() const { return false; } 2138 QualType desugar() const { return QualType(this, 0); } 2139 2140 void Profile(llvm::FoldingSetNodeID &ID) { 2141 Profile(ID, getPointeeType(), getClass()); 2142 } 2143 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 2144 const Type *Class) { 2145 ID.AddPointer(Pointee.getAsOpaquePtr()); 2146 ID.AddPointer(Class); 2147 } 2148 2149 static bool classof(const Type *T) { 2150 return T->getTypeClass() == MemberPointer; 2151 } 2152}; 2153 2154/// ArrayType - C99 6.7.5.2 - Array Declarators. 2155/// 2156class ArrayType : public Type, public llvm::FoldingSetNode { 2157public: 2158 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 2159 /// an array with a static size (e.g. int X[static 4]), or an array 2160 /// with a star size (e.g. int X[*]). 2161 /// 'static' is only allowed on function parameters. 2162 enum ArraySizeModifier { 2163 Normal, Static, Star 2164 }; 2165private: 2166 /// ElementType - The element type of the array. 2167 QualType ElementType; 2168 2169protected: 2170 // C++ [temp.dep.type]p1: 2171 // A type is dependent if it is... 2172 // - an array type constructed from any dependent type or whose 2173 // size is specified by a constant expression that is 2174 // value-dependent, 2175 ArrayType(TypeClass tc, QualType et, QualType can, 2176 ArraySizeModifier sm, unsigned tq, 2177 bool ContainsUnexpandedParameterPack) 2178 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 2179 et->isInstantiationDependentType() || tc == DependentSizedArray, 2180 (tc == VariableArray || et->isVariablyModifiedType()), 2181 ContainsUnexpandedParameterPack), 2182 ElementType(et) { 2183 ArrayTypeBits.IndexTypeQuals = tq; 2184 ArrayTypeBits.SizeModifier = sm; 2185 } 2186 2187 friend class ASTContext; // ASTContext creates these. 2188 2189public: 2190 QualType getElementType() const { return ElementType; } 2191 ArraySizeModifier getSizeModifier() const { 2192 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 2193 } 2194 Qualifiers getIndexTypeQualifiers() const { 2195 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 2196 } 2197 unsigned getIndexTypeCVRQualifiers() const { 2198 return ArrayTypeBits.IndexTypeQuals; 2199 } 2200 2201 static bool classof(const Type *T) { 2202 return T->getTypeClass() == ConstantArray || 2203 T->getTypeClass() == VariableArray || 2204 T->getTypeClass() == IncompleteArray || 2205 T->getTypeClass() == DependentSizedArray; 2206 } 2207}; 2208 2209/// ConstantArrayType - This class represents the canonical version of 2210/// C arrays with a specified constant size. For example, the canonical 2211/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 2212/// type is 'int' and the size is 404. 2213class ConstantArrayType : public ArrayType { 2214 llvm::APInt Size; // Allows us to unique the type. 2215 2216 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 2217 ArraySizeModifier sm, unsigned tq) 2218 : ArrayType(ConstantArray, et, can, sm, tq, 2219 et->containsUnexpandedParameterPack()), 2220 Size(size) {} 2221protected: 2222 ConstantArrayType(TypeClass tc, QualType et, QualType can, 2223 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 2224 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), 2225 Size(size) {} 2226 friend class ASTContext; // ASTContext creates these. 2227public: 2228 const llvm::APInt &getSize() const { return Size; } 2229 bool isSugared() const { return false; } 2230 QualType desugar() const { return QualType(this, 0); } 2231 2232 2233 /// \brief Determine the number of bits required to address a member of 2234 // an array with the given element type and number of elements. 2235 static unsigned getNumAddressingBits(ASTContext &Context, 2236 QualType ElementType, 2237 const llvm::APInt &NumElements); 2238 2239 /// \brief Determine the maximum number of active bits that an array's size 2240 /// can require, which limits the maximum size of the array. 2241 static unsigned getMaxSizeBits(ASTContext &Context); 2242 2243 void Profile(llvm::FoldingSetNodeID &ID) { 2244 Profile(ID, getElementType(), getSize(), 2245 getSizeModifier(), getIndexTypeCVRQualifiers()); 2246 } 2247 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2248 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 2249 unsigned TypeQuals) { 2250 ID.AddPointer(ET.getAsOpaquePtr()); 2251 ID.AddInteger(ArraySize.getZExtValue()); 2252 ID.AddInteger(SizeMod); 2253 ID.AddInteger(TypeQuals); 2254 } 2255 static bool classof(const Type *T) { 2256 return T->getTypeClass() == ConstantArray; 2257 } 2258}; 2259 2260/// IncompleteArrayType - This class represents C arrays with an unspecified 2261/// size. For example 'int A[]' has an IncompleteArrayType where the element 2262/// type is 'int' and the size is unspecified. 2263class IncompleteArrayType : public ArrayType { 2264 2265 IncompleteArrayType(QualType et, QualType can, 2266 ArraySizeModifier sm, unsigned tq) 2267 : ArrayType(IncompleteArray, et, can, sm, tq, 2268 et->containsUnexpandedParameterPack()) {} 2269 friend class ASTContext; // ASTContext creates these. 2270public: 2271 bool isSugared() const { return false; } 2272 QualType desugar() const { return QualType(this, 0); } 2273 2274 static bool classof(const Type *T) { 2275 return T->getTypeClass() == IncompleteArray; 2276 } 2277 2278 friend class StmtIteratorBase; 2279 2280 void Profile(llvm::FoldingSetNodeID &ID) { 2281 Profile(ID, getElementType(), getSizeModifier(), 2282 getIndexTypeCVRQualifiers()); 2283 } 2284 2285 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 2286 ArraySizeModifier SizeMod, unsigned TypeQuals) { 2287 ID.AddPointer(ET.getAsOpaquePtr()); 2288 ID.AddInteger(SizeMod); 2289 ID.AddInteger(TypeQuals); 2290 } 2291}; 2292 2293/// VariableArrayType - This class represents C arrays with a specified size 2294/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 2295/// Since the size expression is an arbitrary expression, we store it as such. 2296/// 2297/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 2298/// should not be: two lexically equivalent variable array types could mean 2299/// different things, for example, these variables do not have the same type 2300/// dynamically: 2301/// 2302/// void foo(int x) { 2303/// int Y[x]; 2304/// ++x; 2305/// int Z[x]; 2306/// } 2307/// 2308class VariableArrayType : public ArrayType { 2309 /// SizeExpr - An assignment expression. VLA's are only permitted within 2310 /// a function block. 2311 Stmt *SizeExpr; 2312 /// Brackets - The left and right array brackets. 2313 SourceRange Brackets; 2314 2315 VariableArrayType(QualType et, QualType can, Expr *e, 2316 ArraySizeModifier sm, unsigned tq, 2317 SourceRange brackets) 2318 : ArrayType(VariableArray, et, can, sm, tq, 2319 et->containsUnexpandedParameterPack()), 2320 SizeExpr((Stmt*) e), Brackets(brackets) {} 2321 friend class ASTContext; // ASTContext creates these. 2322 2323public: 2324 Expr *getSizeExpr() const { 2325 // We use C-style casts instead of cast<> here because we do not wish 2326 // to have a dependency of Type.h on Stmt.h/Expr.h. 2327 return (Expr*) SizeExpr; 2328 } 2329 SourceRange getBracketsRange() const { return Brackets; } 2330 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2331 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2332 2333 bool isSugared() const { return false; } 2334 QualType desugar() const { return QualType(this, 0); } 2335 2336 static bool classof(const Type *T) { 2337 return T->getTypeClass() == VariableArray; 2338 } 2339 2340 friend class StmtIteratorBase; 2341 2342 void Profile(llvm::FoldingSetNodeID &ID) { 2343 llvm_unreachable("Cannot unique VariableArrayTypes."); 2344 } 2345}; 2346 2347/// DependentSizedArrayType - This type represents an array type in 2348/// C++ whose size is a value-dependent expression. For example: 2349/// 2350/// \code 2351/// template<typename T, int Size> 2352/// class array { 2353/// T data[Size]; 2354/// }; 2355/// \endcode 2356/// 2357/// For these types, we won't actually know what the array bound is 2358/// until template instantiation occurs, at which point this will 2359/// become either a ConstantArrayType or a VariableArrayType. 2360class DependentSizedArrayType : public ArrayType { 2361 const ASTContext &Context; 2362 2363 /// \brief An assignment expression that will instantiate to the 2364 /// size of the array. 2365 /// 2366 /// The expression itself might be NULL, in which case the array 2367 /// type will have its size deduced from an initializer. 2368 Stmt *SizeExpr; 2369 2370 /// Brackets - The left and right array brackets. 2371 SourceRange Brackets; 2372 2373 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, 2374 Expr *e, ArraySizeModifier sm, unsigned tq, 2375 SourceRange brackets); 2376 2377 friend class ASTContext; // ASTContext creates these. 2378 2379public: 2380 Expr *getSizeExpr() const { 2381 // We use C-style casts instead of cast<> here because we do not wish 2382 // to have a dependency of Type.h on Stmt.h/Expr.h. 2383 return (Expr*) SizeExpr; 2384 } 2385 SourceRange getBracketsRange() const { return Brackets; } 2386 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 2387 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 2388 2389 bool isSugared() const { return false; } 2390 QualType desugar() const { return QualType(this, 0); } 2391 2392 static bool classof(const Type *T) { 2393 return T->getTypeClass() == DependentSizedArray; 2394 } 2395 2396 friend class StmtIteratorBase; 2397 2398 2399 void Profile(llvm::FoldingSetNodeID &ID) { 2400 Profile(ID, Context, getElementType(), 2401 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 2402 } 2403 2404 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2405 QualType ET, ArraySizeModifier SizeMod, 2406 unsigned TypeQuals, Expr *E); 2407}; 2408 2409/// DependentSizedExtVectorType - This type represent an extended vector type 2410/// where either the type or size is dependent. For example: 2411/// @code 2412/// template<typename T, int Size> 2413/// class vector { 2414/// typedef T __attribute__((ext_vector_type(Size))) type; 2415/// } 2416/// @endcode 2417class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 2418 const ASTContext &Context; 2419 Expr *SizeExpr; 2420 /// ElementType - The element type of the array. 2421 QualType ElementType; 2422 SourceLocation loc; 2423 2424 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, 2425 QualType can, Expr *SizeExpr, SourceLocation loc); 2426 2427 friend class ASTContext; 2428 2429public: 2430 Expr *getSizeExpr() const { return SizeExpr; } 2431 QualType getElementType() const { return ElementType; } 2432 SourceLocation getAttributeLoc() const { return loc; } 2433 2434 bool isSugared() const { return false; } 2435 QualType desugar() const { return QualType(this, 0); } 2436 2437 static bool classof(const Type *T) { 2438 return T->getTypeClass() == DependentSizedExtVector; 2439 } 2440 2441 void Profile(llvm::FoldingSetNodeID &ID) { 2442 Profile(ID, Context, getElementType(), getSizeExpr()); 2443 } 2444 2445 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 2446 QualType ElementType, Expr *SizeExpr); 2447}; 2448 2449 2450/// VectorType - GCC generic vector type. This type is created using 2451/// __attribute__((vector_size(n)), where "n" specifies the vector size in 2452/// bytes; or from an Altivec __vector or vector declaration. 2453/// Since the constructor takes the number of vector elements, the 2454/// client is responsible for converting the size into the number of elements. 2455class VectorType : public Type, public llvm::FoldingSetNode { 2456public: 2457 enum VectorKind { 2458 GenericVector, // not a target-specific vector type 2459 AltiVecVector, // is AltiVec vector 2460 AltiVecPixel, // is AltiVec 'vector Pixel' 2461 AltiVecBool, // is AltiVec 'vector bool ...' 2462 NeonVector, // is ARM Neon vector 2463 NeonPolyVector // is ARM Neon polynomial vector 2464 }; 2465protected: 2466 /// ElementType - The element type of the vector. 2467 QualType ElementType; 2468 2469 VectorType(QualType vecType, unsigned nElements, QualType canonType, 2470 VectorKind vecKind); 2471 2472 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 2473 QualType canonType, VectorKind vecKind); 2474 2475 friend class ASTContext; // ASTContext creates these. 2476 2477public: 2478 2479 QualType getElementType() const { return ElementType; } 2480 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 2481 2482 bool isSugared() const { return false; } 2483 QualType desugar() const { return QualType(this, 0); } 2484 2485 VectorKind getVectorKind() const { 2486 return VectorKind(VectorTypeBits.VecKind); 2487 } 2488 2489 void Profile(llvm::FoldingSetNodeID &ID) { 2490 Profile(ID, getElementType(), getNumElements(), 2491 getTypeClass(), getVectorKind()); 2492 } 2493 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2494 unsigned NumElements, TypeClass TypeClass, 2495 VectorKind VecKind) { 2496 ID.AddPointer(ElementType.getAsOpaquePtr()); 2497 ID.AddInteger(NumElements); 2498 ID.AddInteger(TypeClass); 2499 ID.AddInteger(VecKind); 2500 } 2501 2502 static bool classof(const Type *T) { 2503 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2504 } 2505}; 2506 2507/// ExtVectorType - Extended vector type. This type is created using 2508/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2509/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2510/// class enables syntactic extensions, like Vector Components for accessing 2511/// points, colors, and textures (modeled after OpenGL Shading Language). 2512class ExtVectorType : public VectorType { 2513 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2514 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2515 friend class ASTContext; // ASTContext creates these. 2516public: 2517 static int getPointAccessorIdx(char c) { 2518 switch (c) { 2519 default: return -1; 2520 case 'x': return 0; 2521 case 'y': return 1; 2522 case 'z': return 2; 2523 case 'w': return 3; 2524 } 2525 } 2526 static int getNumericAccessorIdx(char c) { 2527 switch (c) { 2528 default: return -1; 2529 case '0': return 0; 2530 case '1': return 1; 2531 case '2': return 2; 2532 case '3': return 3; 2533 case '4': return 4; 2534 case '5': return 5; 2535 case '6': return 6; 2536 case '7': return 7; 2537 case '8': return 8; 2538 case '9': return 9; 2539 case 'A': 2540 case 'a': return 10; 2541 case 'B': 2542 case 'b': return 11; 2543 case 'C': 2544 case 'c': return 12; 2545 case 'D': 2546 case 'd': return 13; 2547 case 'E': 2548 case 'e': return 14; 2549 case 'F': 2550 case 'f': return 15; 2551 } 2552 } 2553 2554 static int getAccessorIdx(char c) { 2555 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2556 return getNumericAccessorIdx(c); 2557 } 2558 2559 bool isAccessorWithinNumElements(char c) const { 2560 if (int idx = getAccessorIdx(c)+1) 2561 return unsigned(idx-1) < getNumElements(); 2562 return false; 2563 } 2564 bool isSugared() const { return false; } 2565 QualType desugar() const { return QualType(this, 0); } 2566 2567 static bool classof(const Type *T) { 2568 return T->getTypeClass() == ExtVector; 2569 } 2570}; 2571 2572/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2573/// class of FunctionNoProtoType and FunctionProtoType. 2574/// 2575class FunctionType : public Type { 2576 // The type returned by the function. 2577 QualType ResultType; 2578 2579 public: 2580 /// ExtInfo - A class which abstracts out some details necessary for 2581 /// making a call. 2582 /// 2583 /// It is not actually used directly for storing this information in 2584 /// a FunctionType, although FunctionType does currently use the 2585 /// same bit-pattern. 2586 /// 2587 // If you add a field (say Foo), other than the obvious places (both, 2588 // constructors, compile failures), what you need to update is 2589 // * Operator== 2590 // * getFoo 2591 // * withFoo 2592 // * functionType. Add Foo, getFoo. 2593 // * ASTContext::getFooType 2594 // * ASTContext::mergeFunctionTypes 2595 // * FunctionNoProtoType::Profile 2596 // * FunctionProtoType::Profile 2597 // * TypePrinter::PrintFunctionProto 2598 // * AST read and write 2599 // * Codegen 2600 class ExtInfo { 2601 // Feel free to rearrange or add bits, but if you go over 8, 2602 // you'll need to adjust both the Bits field below and 2603 // Type::FunctionTypeBitfields. 2604 2605 // | CC |noreturn|produces|regparm| 2606 // |0 .. 2| 3 | 4 | 5 .. 7| 2607 // 2608 // regparm is either 0 (no regparm attribute) or the regparm value+1. 2609 enum { CallConvMask = 0x7 }; 2610 enum { NoReturnMask = 0x8 }; 2611 enum { ProducesResultMask = 0x10 }; 2612 enum { RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask), 2613 RegParmOffset = 5 }; // Assumed to be the last field 2614 2615 uint16_t Bits; 2616 2617 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} 2618 2619 friend class FunctionType; 2620 2621 public: 2622 // Constructor with no defaults. Use this when you know that you 2623 // have all the elements (when reading an AST file for example). 2624 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, 2625 bool producesResult) { 2626 assert((!hasRegParm || regParm < 7) && "Invalid regparm value"); 2627 Bits = ((unsigned) cc) | 2628 (noReturn ? NoReturnMask : 0) | 2629 (producesResult ? ProducesResultMask : 0) | 2630 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0); 2631 } 2632 2633 // Constructor with all defaults. Use when for example creating a 2634 // function know to use defaults. 2635 ExtInfo() : Bits(0) {} 2636 2637 bool getNoReturn() const { return Bits & NoReturnMask; } 2638 bool getProducesResult() const { return Bits & ProducesResultMask; } 2639 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } 2640 unsigned getRegParm() const { 2641 unsigned RegParm = Bits >> RegParmOffset; 2642 if (RegParm > 0) 2643 --RegParm; 2644 return RegParm; 2645 } 2646 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2647 2648 bool operator==(ExtInfo Other) const { 2649 return Bits == Other.Bits; 2650 } 2651 bool operator!=(ExtInfo Other) const { 2652 return Bits != Other.Bits; 2653 } 2654 2655 // Note that we don't have setters. That is by design, use 2656 // the following with methods instead of mutating these objects. 2657 2658 ExtInfo withNoReturn(bool noReturn) const { 2659 if (noReturn) 2660 return ExtInfo(Bits | NoReturnMask); 2661 else 2662 return ExtInfo(Bits & ~NoReturnMask); 2663 } 2664 2665 ExtInfo withProducesResult(bool producesResult) const { 2666 if (producesResult) 2667 return ExtInfo(Bits | ProducesResultMask); 2668 else 2669 return ExtInfo(Bits & ~ProducesResultMask); 2670 } 2671 2672 ExtInfo withRegParm(unsigned RegParm) const { 2673 assert(RegParm < 7 && "Invalid regparm value"); 2674 return ExtInfo((Bits & ~RegParmMask) | 2675 ((RegParm + 1) << RegParmOffset)); 2676 } 2677 2678 ExtInfo withCallingConv(CallingConv cc) const { 2679 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2680 } 2681 2682 void Profile(llvm::FoldingSetNodeID &ID) const { 2683 ID.AddInteger(Bits); 2684 } 2685 }; 2686 2687protected: 2688 FunctionType(TypeClass tc, QualType res, 2689 unsigned typeQuals, RefQualifierKind RefQualifier, 2690 QualType Canonical, bool Dependent, 2691 bool InstantiationDependent, 2692 bool VariablyModified, bool ContainsUnexpandedParameterPack, 2693 ExtInfo Info) 2694 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 2695 ContainsUnexpandedParameterPack), 2696 ResultType(res) { 2697 FunctionTypeBits.ExtInfo = Info.Bits; 2698 FunctionTypeBits.TypeQuals = typeQuals; 2699 FunctionTypeBits.RefQualifier = static_cast<unsigned>(RefQualifier); 2700 } 2701 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2702 2703 RefQualifierKind getRefQualifier() const { 2704 return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); 2705 } 2706 2707public: 2708 2709 QualType getResultType() const { return ResultType; } 2710 2711 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } 2712 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2713 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2714 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2715 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2716 bool isConst() const { return getTypeQuals() & Qualifiers::Const; } 2717 bool isVolatile() const { return getTypeQuals() & Qualifiers::Volatile; } 2718 bool isRestrict() const { return getTypeQuals() & Qualifiers::Restrict; } 2719 2720 /// \brief Determine the type of an expression that calls a function of 2721 /// this type. 2722 QualType getCallResultType(ASTContext &Context) const { 2723 return getResultType().getNonLValueExprType(Context); 2724 } 2725 2726 static StringRef getNameForCallConv(CallingConv CC); 2727 2728 static bool classof(const Type *T) { 2729 return T->getTypeClass() == FunctionNoProto || 2730 T->getTypeClass() == FunctionProto; 2731 } 2732}; 2733 2734/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2735/// no information available about its arguments. 2736class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2737 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2738 : FunctionType(FunctionNoProto, Result, 0, RQ_None, Canonical, 2739 /*Dependent=*/false, /*InstantiationDependent=*/false, 2740 Result->isVariablyModifiedType(), 2741 /*ContainsUnexpandedParameterPack=*/false, Info) {} 2742 2743 friend class ASTContext; // ASTContext creates these. 2744 2745public: 2746 // No additional state past what FunctionType provides. 2747 2748 bool isSugared() const { return false; } 2749 QualType desugar() const { return QualType(this, 0); } 2750 2751 void Profile(llvm::FoldingSetNodeID &ID) { 2752 Profile(ID, getResultType(), getExtInfo()); 2753 } 2754 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2755 ExtInfo Info) { 2756 Info.Profile(ID); 2757 ID.AddPointer(ResultType.getAsOpaquePtr()); 2758 } 2759 2760 static bool classof(const Type *T) { 2761 return T->getTypeClass() == FunctionNoProto; 2762 } 2763}; 2764 2765/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2766/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2767/// arguments, not as having a single void argument. Such a type can have an 2768/// exception specification, but this specification is not part of the canonical 2769/// type. 2770class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2771public: 2772 /// ExtProtoInfo - Extra information about a function prototype. 2773 struct ExtProtoInfo { 2774 ExtProtoInfo() : 2775 Variadic(false), HasTrailingReturn(false), TypeQuals(0), 2776 ExceptionSpecType(EST_None), RefQualifier(RQ_None), 2777 NumExceptions(0), Exceptions(0), NoexceptExpr(0), 2778 ExceptionSpecDecl(0), ExceptionSpecTemplate(0), 2779 ConsumedArguments(0) {} 2780 2781 FunctionType::ExtInfo ExtInfo; 2782 bool Variadic : 1; 2783 bool HasTrailingReturn : 1; 2784 unsigned char TypeQuals; 2785 ExceptionSpecificationType ExceptionSpecType; 2786 RefQualifierKind RefQualifier; 2787 unsigned NumExceptions; 2788 const QualType *Exceptions; 2789 Expr *NoexceptExpr; 2790 FunctionDecl *ExceptionSpecDecl; 2791 FunctionDecl *ExceptionSpecTemplate; 2792 const bool *ConsumedArguments; 2793 }; 2794 2795private: 2796 /// \brief Determine whether there are any argument types that 2797 /// contain an unexpanded parameter pack. 2798 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, 2799 unsigned numArgs) { 2800 for (unsigned Idx = 0; Idx < numArgs; ++Idx) 2801 if (ArgArray[Idx]->containsUnexpandedParameterPack()) 2802 return true; 2803 2804 return false; 2805 } 2806 2807 FunctionProtoType(QualType result, const QualType *args, unsigned numArgs, 2808 QualType canonical, const ExtProtoInfo &epi); 2809 2810 /// NumArgs - The number of arguments this function has, not counting '...'. 2811 unsigned NumArgs : 17; 2812 2813 /// NumExceptions - The number of types in the exception spec, if any. 2814 unsigned NumExceptions : 9; 2815 2816 /// ExceptionSpecType - The type of exception specification this function has. 2817 unsigned ExceptionSpecType : 3; 2818 2819 /// HasAnyConsumedArgs - Whether this function has any consumed arguments. 2820 unsigned HasAnyConsumedArgs : 1; 2821 2822 /// Variadic - Whether the function is variadic. 2823 unsigned Variadic : 1; 2824 2825 /// HasTrailingReturn - Whether this function has a trailing return type. 2826 unsigned HasTrailingReturn : 1; 2827 2828 // ArgInfo - There is an variable size array after the class in memory that 2829 // holds the argument types. 2830 2831 // Exceptions - There is another variable size array after ArgInfo that 2832 // holds the exception types. 2833 2834 // NoexceptExpr - Instead of Exceptions, there may be a single Expr* pointing 2835 // to the expression in the noexcept() specifier. 2836 2837 // ExceptionSpecDecl, ExceptionSpecTemplate - Instead of Exceptions, there may 2838 // be a pair of FunctionDecl* pointing to the function which should be used to 2839 // instantiate this function type's exception specification, and the function 2840 // from which it should be instantiated. 2841 2842 // ConsumedArgs - A variable size array, following Exceptions 2843 // and of length NumArgs, holding flags indicating which arguments 2844 // are consumed. This only appears if HasAnyConsumedArgs is true. 2845 2846 friend class ASTContext; // ASTContext creates these. 2847 2848 const bool *getConsumedArgsBuffer() const { 2849 assert(hasAnyConsumedArgs()); 2850 2851 // Find the end of the exceptions. 2852 Expr * const *eh_end = reinterpret_cast<Expr * const *>(arg_type_end()); 2853 if (getExceptionSpecType() != EST_ComputedNoexcept) 2854 eh_end += NumExceptions; 2855 else 2856 eh_end += 1; // NoexceptExpr 2857 2858 return reinterpret_cast<const bool*>(eh_end); 2859 } 2860 2861public: 2862 unsigned getNumArgs() const { return NumArgs; } 2863 QualType getArgType(unsigned i) const { 2864 assert(i < NumArgs && "Invalid argument number!"); 2865 return arg_type_begin()[i]; 2866 } 2867 2868 ExtProtoInfo getExtProtoInfo() const { 2869 ExtProtoInfo EPI; 2870 EPI.ExtInfo = getExtInfo(); 2871 EPI.Variadic = isVariadic(); 2872 EPI.HasTrailingReturn = hasTrailingReturn(); 2873 EPI.ExceptionSpecType = getExceptionSpecType(); 2874 EPI.TypeQuals = static_cast<unsigned char>(getTypeQuals()); 2875 EPI.RefQualifier = getRefQualifier(); 2876 if (EPI.ExceptionSpecType == EST_Dynamic) { 2877 EPI.NumExceptions = NumExceptions; 2878 EPI.Exceptions = exception_begin(); 2879 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2880 EPI.NoexceptExpr = getNoexceptExpr(); 2881 } else if (EPI.ExceptionSpecType == EST_Uninstantiated) { 2882 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2883 EPI.ExceptionSpecTemplate = getExceptionSpecTemplate(); 2884 } else if (EPI.ExceptionSpecType == EST_Unevaluated) { 2885 EPI.ExceptionSpecDecl = getExceptionSpecDecl(); 2886 } 2887 if (hasAnyConsumedArgs()) 2888 EPI.ConsumedArguments = getConsumedArgsBuffer(); 2889 return EPI; 2890 } 2891 2892 /// \brief Get the kind of exception specification on this function. 2893 ExceptionSpecificationType getExceptionSpecType() const { 2894 return static_cast<ExceptionSpecificationType>(ExceptionSpecType); 2895 } 2896 /// \brief Return whether this function has any kind of exception spec. 2897 bool hasExceptionSpec() const { 2898 return getExceptionSpecType() != EST_None; 2899 } 2900 /// \brief Return whether this function has a dynamic (throw) exception spec. 2901 bool hasDynamicExceptionSpec() const { 2902 return isDynamicExceptionSpec(getExceptionSpecType()); 2903 } 2904 /// \brief Return whether this function has a noexcept exception spec. 2905 bool hasNoexceptExceptionSpec() const { 2906 return isNoexceptExceptionSpec(getExceptionSpecType()); 2907 } 2908 /// \brief Result type of getNoexceptSpec(). 2909 enum NoexceptResult { 2910 NR_NoNoexcept, ///< There is no noexcept specifier. 2911 NR_BadNoexcept, ///< The noexcept specifier has a bad expression. 2912 NR_Dependent, ///< The noexcept specifier is dependent. 2913 NR_Throw, ///< The noexcept specifier evaluates to false. 2914 NR_Nothrow ///< The noexcept specifier evaluates to true. 2915 }; 2916 /// \brief Get the meaning of the noexcept spec on this function, if any. 2917 NoexceptResult getNoexceptSpec(ASTContext &Ctx) const; 2918 unsigned getNumExceptions() const { return NumExceptions; } 2919 QualType getExceptionType(unsigned i) const { 2920 assert(i < NumExceptions && "Invalid exception number!"); 2921 return exception_begin()[i]; 2922 } 2923 Expr *getNoexceptExpr() const { 2924 if (getExceptionSpecType() != EST_ComputedNoexcept) 2925 return 0; 2926 // NoexceptExpr sits where the arguments end. 2927 return *reinterpret_cast<Expr *const *>(arg_type_end()); 2928 } 2929 /// \brief If this function type has an exception specification which hasn't 2930 /// been determined yet (either because it has not been evaluated or because 2931 /// it has not been instantiated), this is the function whose exception 2932 /// specification is represented by this type. 2933 FunctionDecl *getExceptionSpecDecl() const { 2934 if (getExceptionSpecType() != EST_Uninstantiated && 2935 getExceptionSpecType() != EST_Unevaluated) 2936 return 0; 2937 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[0]; 2938 } 2939 /// \brief If this function type has an uninstantiated exception 2940 /// specification, this is the function whose exception specification 2941 /// should be instantiated to find the exception specification for 2942 /// this type. 2943 FunctionDecl *getExceptionSpecTemplate() const { 2944 if (getExceptionSpecType() != EST_Uninstantiated) 2945 return 0; 2946 return reinterpret_cast<FunctionDecl * const *>(arg_type_end())[1]; 2947 } 2948 bool isNothrow(ASTContext &Ctx) const { 2949 ExceptionSpecificationType EST = getExceptionSpecType(); 2950 assert(EST != EST_Unevaluated && EST != EST_Uninstantiated); 2951 if (EST == EST_DynamicNone || EST == EST_BasicNoexcept) 2952 return true; 2953 if (EST != EST_ComputedNoexcept) 2954 return false; 2955 return getNoexceptSpec(Ctx) == NR_Nothrow; 2956 } 2957 2958 bool isVariadic() const { return Variadic; } 2959 2960 /// \brief Determines whether this function prototype contains a 2961 /// parameter pack at the end. 2962 /// 2963 /// A function template whose last parameter is a parameter pack can be 2964 /// called with an arbitrary number of arguments, much like a variadic 2965 /// function. 2966 bool isTemplateVariadic() const; 2967 2968 bool hasTrailingReturn() const { return HasTrailingReturn; } 2969 2970 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2971 2972 2973 /// \brief Retrieve the ref-qualifier associated with this function type. 2974 RefQualifierKind getRefQualifier() const { 2975 return FunctionType::getRefQualifier(); 2976 } 2977 2978 typedef const QualType *arg_type_iterator; 2979 arg_type_iterator arg_type_begin() const { 2980 return reinterpret_cast<const QualType *>(this+1); 2981 } 2982 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2983 2984 typedef const QualType *exception_iterator; 2985 exception_iterator exception_begin() const { 2986 // exceptions begin where arguments end 2987 return arg_type_end(); 2988 } 2989 exception_iterator exception_end() const { 2990 if (getExceptionSpecType() != EST_Dynamic) 2991 return exception_begin(); 2992 return exception_begin() + NumExceptions; 2993 } 2994 2995 bool hasAnyConsumedArgs() const { 2996 return HasAnyConsumedArgs; 2997 } 2998 bool isArgConsumed(unsigned I) const { 2999 assert(I < getNumArgs() && "argument index out of range!"); 3000 if (hasAnyConsumedArgs()) 3001 return getConsumedArgsBuffer()[I]; 3002 return false; 3003 } 3004 3005 bool isSugared() const { return false; } 3006 QualType desugar() const { return QualType(this, 0); } 3007 3008 // FIXME: Remove the string version. 3009 void printExceptionSpecification(std::string &S, 3010 const PrintingPolicy &Policy) const; 3011 void printExceptionSpecification(raw_ostream &OS, 3012 const PrintingPolicy &Policy) const; 3013 3014 static bool classof(const Type *T) { 3015 return T->getTypeClass() == FunctionProto; 3016 } 3017 3018 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); 3019 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 3020 arg_type_iterator ArgTys, unsigned NumArgs, 3021 const ExtProtoInfo &EPI, const ASTContext &Context); 3022}; 3023 3024 3025/// \brief Represents the dependent type named by a dependently-scoped 3026/// typename using declaration, e.g. 3027/// using typename Base<T>::foo; 3028/// Template instantiation turns these into the underlying type. 3029class UnresolvedUsingType : public Type { 3030 UnresolvedUsingTypenameDecl *Decl; 3031 3032 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 3033 : Type(UnresolvedUsing, QualType(), true, true, false, 3034 /*ContainsUnexpandedParameterPack=*/false), 3035 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 3036 friend class ASTContext; // ASTContext creates these. 3037public: 3038 3039 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 3040 3041 bool isSugared() const { return false; } 3042 QualType desugar() const { return QualType(this, 0); } 3043 3044 static bool classof(const Type *T) { 3045 return T->getTypeClass() == UnresolvedUsing; 3046 } 3047 3048 void Profile(llvm::FoldingSetNodeID &ID) { 3049 return Profile(ID, Decl); 3050 } 3051 static void Profile(llvm::FoldingSetNodeID &ID, 3052 UnresolvedUsingTypenameDecl *D) { 3053 ID.AddPointer(D); 3054 } 3055}; 3056 3057 3058class TypedefType : public Type { 3059 TypedefNameDecl *Decl; 3060protected: 3061 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) 3062 : Type(tc, can, can->isDependentType(), 3063 can->isInstantiationDependentType(), 3064 can->isVariablyModifiedType(), 3065 /*ContainsUnexpandedParameterPack=*/false), 3066 Decl(const_cast<TypedefNameDecl*>(D)) { 3067 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3068 } 3069 friend class ASTContext; // ASTContext creates these. 3070public: 3071 3072 TypedefNameDecl *getDecl() const { return Decl; } 3073 3074 bool isSugared() const { return true; } 3075 QualType desugar() const; 3076 3077 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 3078}; 3079 3080/// TypeOfExprType (GCC extension). 3081class TypeOfExprType : public Type { 3082 Expr *TOExpr; 3083 3084protected: 3085 TypeOfExprType(Expr *E, QualType can = QualType()); 3086 friend class ASTContext; // ASTContext creates these. 3087public: 3088 Expr *getUnderlyingExpr() const { return TOExpr; } 3089 3090 /// \brief Remove a single level of sugar. 3091 QualType desugar() const; 3092 3093 /// \brief Returns whether this type directly provides sugar. 3094 bool isSugared() const; 3095 3096 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 3097}; 3098 3099/// \brief Internal representation of canonical, dependent 3100/// typeof(expr) types. 3101/// 3102/// This class is used internally by the ASTContext to manage 3103/// canonical, dependent types, only. Clients will only see instances 3104/// of this class via TypeOfExprType nodes. 3105class DependentTypeOfExprType 3106 : public TypeOfExprType, public llvm::FoldingSetNode { 3107 const ASTContext &Context; 3108 3109public: 3110 DependentTypeOfExprType(const ASTContext &Context, Expr *E) 3111 : TypeOfExprType(E), Context(Context) { } 3112 3113 void Profile(llvm::FoldingSetNodeID &ID) { 3114 Profile(ID, Context, getUnderlyingExpr()); 3115 } 3116 3117 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3118 Expr *E); 3119}; 3120 3121/// TypeOfType (GCC extension). 3122class TypeOfType : public Type { 3123 QualType TOType; 3124 TypeOfType(QualType T, QualType can) 3125 : Type(TypeOf, can, T->isDependentType(), 3126 T->isInstantiationDependentType(), 3127 T->isVariablyModifiedType(), 3128 T->containsUnexpandedParameterPack()), 3129 TOType(T) { 3130 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 3131 } 3132 friend class ASTContext; // ASTContext creates these. 3133public: 3134 QualType getUnderlyingType() const { return TOType; } 3135 3136 /// \brief Remove a single level of sugar. 3137 QualType desugar() const { return getUnderlyingType(); } 3138 3139 /// \brief Returns whether this type directly provides sugar. 3140 bool isSugared() const { return true; } 3141 3142 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 3143}; 3144 3145/// DecltypeType (C++0x) 3146class DecltypeType : public Type { 3147 Expr *E; 3148 QualType UnderlyingType; 3149 3150protected: 3151 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 3152 friend class ASTContext; // ASTContext creates these. 3153public: 3154 Expr *getUnderlyingExpr() const { return E; } 3155 QualType getUnderlyingType() const { return UnderlyingType; } 3156 3157 /// \brief Remove a single level of sugar. 3158 QualType desugar() const; 3159 3160 /// \brief Returns whether this type directly provides sugar. 3161 bool isSugared() const; 3162 3163 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 3164}; 3165 3166/// \brief Internal representation of canonical, dependent 3167/// decltype(expr) types. 3168/// 3169/// This class is used internally by the ASTContext to manage 3170/// canonical, dependent types, only. Clients will only see instances 3171/// of this class via DecltypeType nodes. 3172class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 3173 const ASTContext &Context; 3174 3175public: 3176 DependentDecltypeType(const ASTContext &Context, Expr *E); 3177 3178 void Profile(llvm::FoldingSetNodeID &ID) { 3179 Profile(ID, Context, getUnderlyingExpr()); 3180 } 3181 3182 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 3183 Expr *E); 3184}; 3185 3186/// \brief A unary type transform, which is a type constructed from another 3187class UnaryTransformType : public Type { 3188public: 3189 enum UTTKind { 3190 EnumUnderlyingType 3191 }; 3192 3193private: 3194 /// The untransformed type. 3195 QualType BaseType; 3196 /// The transformed type if not dependent, otherwise the same as BaseType. 3197 QualType UnderlyingType; 3198 3199 UTTKind UKind; 3200protected: 3201 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, 3202 QualType CanonicalTy); 3203 friend class ASTContext; 3204public: 3205 bool isSugared() const { return !isDependentType(); } 3206 QualType desugar() const { return UnderlyingType; } 3207 3208 QualType getUnderlyingType() const { return UnderlyingType; } 3209 QualType getBaseType() const { return BaseType; } 3210 3211 UTTKind getUTTKind() const { return UKind; } 3212 3213 static bool classof(const Type *T) { 3214 return T->getTypeClass() == UnaryTransform; 3215 } 3216}; 3217 3218class TagType : public Type { 3219 /// Stores the TagDecl associated with this type. The decl may point to any 3220 /// TagDecl that declares the entity. 3221 TagDecl * decl; 3222 3223 friend class ASTReader; 3224 3225protected: 3226 TagType(TypeClass TC, const TagDecl *D, QualType can); 3227 3228public: 3229 TagDecl *getDecl() const; 3230 3231 /// @brief Determines whether this type is in the process of being 3232 /// defined. 3233 bool isBeingDefined() const; 3234 3235 static bool classof(const Type *T) { 3236 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 3237 } 3238}; 3239 3240/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 3241/// to detect TagType objects of structs/unions/classes. 3242class RecordType : public TagType { 3243protected: 3244 explicit RecordType(const RecordDecl *D) 3245 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3246 explicit RecordType(TypeClass TC, RecordDecl *D) 3247 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3248 friend class ASTContext; // ASTContext creates these. 3249public: 3250 3251 RecordDecl *getDecl() const { 3252 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 3253 } 3254 3255 // FIXME: This predicate is a helper to QualType/Type. It needs to 3256 // recursively check all fields for const-ness. If any field is declared 3257 // const, it needs to return false. 3258 bool hasConstFields() const { return false; } 3259 3260 bool isSugared() const { return false; } 3261 QualType desugar() const { return QualType(this, 0); } 3262 3263 static bool classof(const Type *T) { return T->getTypeClass() == Record; } 3264}; 3265 3266/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 3267/// to detect TagType objects of enums. 3268class EnumType : public TagType { 3269 explicit EnumType(const EnumDecl *D) 3270 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 3271 friend class ASTContext; // ASTContext creates these. 3272public: 3273 3274 EnumDecl *getDecl() const { 3275 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 3276 } 3277 3278 bool isSugared() const { return false; } 3279 QualType desugar() const { return QualType(this, 0); } 3280 3281 static bool classof(const Type *T) { return T->getTypeClass() == Enum; } 3282}; 3283 3284/// AttributedType - An attributed type is a type to which a type 3285/// attribute has been applied. The "modified type" is the 3286/// fully-sugared type to which the attributed type was applied; 3287/// generally it is not canonically equivalent to the attributed type. 3288/// The "equivalent type" is the minimally-desugared type which the 3289/// type is canonically equivalent to. 3290/// 3291/// For example, in the following attributed type: 3292/// int32_t __attribute__((vector_size(16))) 3293/// - the modified type is the TypedefType for int32_t 3294/// - the equivalent type is VectorType(16, int32_t) 3295/// - the canonical type is VectorType(16, int) 3296class AttributedType : public Type, public llvm::FoldingSetNode { 3297public: 3298 // It is really silly to have yet another attribute-kind enum, but 3299 // clang::attr::Kind doesn't currently cover the pure type attrs. 3300 enum Kind { 3301 // Expression operand. 3302 attr_address_space, 3303 attr_regparm, 3304 attr_vector_size, 3305 attr_neon_vector_type, 3306 attr_neon_polyvector_type, 3307 3308 FirstExprOperandKind = attr_address_space, 3309 LastExprOperandKind = attr_neon_polyvector_type, 3310 3311 // Enumerated operand (string or keyword). 3312 attr_objc_gc, 3313 attr_objc_ownership, 3314 attr_pcs, 3315 3316 FirstEnumOperandKind = attr_objc_gc, 3317 LastEnumOperandKind = attr_pcs, 3318 3319 // No operand. 3320 attr_noreturn, 3321 attr_cdecl, 3322 attr_fastcall, 3323 attr_stdcall, 3324 attr_thiscall, 3325 attr_pascal 3326 }; 3327 3328private: 3329 QualType ModifiedType; 3330 QualType EquivalentType; 3331 3332 friend class ASTContext; // creates these 3333 3334 AttributedType(QualType canon, Kind attrKind, 3335 QualType modified, QualType equivalent) 3336 : Type(Attributed, canon, canon->isDependentType(), 3337 canon->isInstantiationDependentType(), 3338 canon->isVariablyModifiedType(), 3339 canon->containsUnexpandedParameterPack()), 3340 ModifiedType(modified), EquivalentType(equivalent) { 3341 AttributedTypeBits.AttrKind = attrKind; 3342 } 3343 3344public: 3345 Kind getAttrKind() const { 3346 return static_cast<Kind>(AttributedTypeBits.AttrKind); 3347 } 3348 3349 QualType getModifiedType() const { return ModifiedType; } 3350 QualType getEquivalentType() const { return EquivalentType; } 3351 3352 bool isSugared() const { return true; } 3353 QualType desugar() const { return getEquivalentType(); } 3354 3355 void Profile(llvm::FoldingSetNodeID &ID) { 3356 Profile(ID, getAttrKind(), ModifiedType, EquivalentType); 3357 } 3358 3359 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, 3360 QualType modified, QualType equivalent) { 3361 ID.AddInteger(attrKind); 3362 ID.AddPointer(modified.getAsOpaquePtr()); 3363 ID.AddPointer(equivalent.getAsOpaquePtr()); 3364 } 3365 3366 static bool classof(const Type *T) { 3367 return T->getTypeClass() == Attributed; 3368 } 3369}; 3370 3371class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3372 // Helper data collector for canonical types. 3373 struct CanonicalTTPTInfo { 3374 unsigned Depth : 15; 3375 unsigned ParameterPack : 1; 3376 unsigned Index : 16; 3377 }; 3378 3379 union { 3380 // Info for the canonical type. 3381 CanonicalTTPTInfo CanTTPTInfo; 3382 // Info for the non-canonical type. 3383 TemplateTypeParmDecl *TTPDecl; 3384 }; 3385 3386 /// Build a non-canonical type. 3387 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) 3388 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 3389 /*InstantiationDependent=*/true, 3390 /*VariablyModified=*/false, 3391 Canon->containsUnexpandedParameterPack()), 3392 TTPDecl(TTPDecl) { } 3393 3394 /// Build the canonical type. 3395 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 3396 : Type(TemplateTypeParm, QualType(this, 0), 3397 /*Dependent=*/true, 3398 /*InstantiationDependent=*/true, 3399 /*VariablyModified=*/false, PP) { 3400 CanTTPTInfo.Depth = D; 3401 CanTTPTInfo.Index = I; 3402 CanTTPTInfo.ParameterPack = PP; 3403 } 3404 3405 friend class ASTContext; // ASTContext creates these 3406 3407 const CanonicalTTPTInfo& getCanTTPTInfo() const { 3408 QualType Can = getCanonicalTypeInternal(); 3409 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; 3410 } 3411 3412public: 3413 unsigned getDepth() const { return getCanTTPTInfo().Depth; } 3414 unsigned getIndex() const { return getCanTTPTInfo().Index; } 3415 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } 3416 3417 TemplateTypeParmDecl *getDecl() const { 3418 return isCanonicalUnqualified() ? 0 : TTPDecl; 3419 } 3420 3421 IdentifierInfo *getIdentifier() const; 3422 3423 bool isSugared() const { return false; } 3424 QualType desugar() const { return QualType(this, 0); } 3425 3426 void Profile(llvm::FoldingSetNodeID &ID) { 3427 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); 3428 } 3429 3430 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 3431 unsigned Index, bool ParameterPack, 3432 TemplateTypeParmDecl *TTPDecl) { 3433 ID.AddInteger(Depth); 3434 ID.AddInteger(Index); 3435 ID.AddBoolean(ParameterPack); 3436 ID.AddPointer(TTPDecl); 3437 } 3438 3439 static bool classof(const Type *T) { 3440 return T->getTypeClass() == TemplateTypeParm; 3441 } 3442}; 3443 3444/// \brief Represents the result of substituting a type for a template 3445/// type parameter. 3446/// 3447/// Within an instantiated template, all template type parameters have 3448/// been replaced with these. They are used solely to record that a 3449/// type was originally written as a template type parameter; 3450/// therefore they are never canonical. 3451class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 3452 // The original type parameter. 3453 const TemplateTypeParmType *Replaced; 3454 3455 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 3456 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 3457 Canon->isInstantiationDependentType(), 3458 Canon->isVariablyModifiedType(), 3459 Canon->containsUnexpandedParameterPack()), 3460 Replaced(Param) { } 3461 3462 friend class ASTContext; 3463 3464public: 3465 /// Gets the template parameter that was substituted for. 3466 const TemplateTypeParmType *getReplacedParameter() const { 3467 return Replaced; 3468 } 3469 3470 /// Gets the type that was substituted for the template 3471 /// parameter. 3472 QualType getReplacementType() const { 3473 return getCanonicalTypeInternal(); 3474 } 3475 3476 bool isSugared() const { return true; } 3477 QualType desugar() const { return getReplacementType(); } 3478 3479 void Profile(llvm::FoldingSetNodeID &ID) { 3480 Profile(ID, getReplacedParameter(), getReplacementType()); 3481 } 3482 static void Profile(llvm::FoldingSetNodeID &ID, 3483 const TemplateTypeParmType *Replaced, 3484 QualType Replacement) { 3485 ID.AddPointer(Replaced); 3486 ID.AddPointer(Replacement.getAsOpaquePtr()); 3487 } 3488 3489 static bool classof(const Type *T) { 3490 return T->getTypeClass() == SubstTemplateTypeParm; 3491 } 3492}; 3493 3494/// \brief Represents the result of substituting a set of types for a template 3495/// type parameter pack. 3496/// 3497/// When a pack expansion in the source code contains multiple parameter packs 3498/// and those parameter packs correspond to different levels of template 3499/// parameter lists, this type node is used to represent a template type 3500/// parameter pack from an outer level, which has already had its argument pack 3501/// substituted but that still lives within a pack expansion that itself 3502/// could not be instantiated. When actually performing a substitution into 3503/// that pack expansion (e.g., when all template parameters have corresponding 3504/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType 3505/// at the current pack substitution index. 3506class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { 3507 /// \brief The original type parameter. 3508 const TemplateTypeParmType *Replaced; 3509 3510 /// \brief A pointer to the set of template arguments that this 3511 /// parameter pack is instantiated with. 3512 const TemplateArgument *Arguments; 3513 3514 /// \brief The number of template arguments in \c Arguments. 3515 unsigned NumArguments; 3516 3517 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, 3518 QualType Canon, 3519 const TemplateArgument &ArgPack); 3520 3521 friend class ASTContext; 3522 3523public: 3524 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } 3525 3526 /// Gets the template parameter that was substituted for. 3527 const TemplateTypeParmType *getReplacedParameter() const { 3528 return Replaced; 3529 } 3530 3531 bool isSugared() const { return false; } 3532 QualType desugar() const { return QualType(this, 0); } 3533 3534 TemplateArgument getArgumentPack() const; 3535 3536 void Profile(llvm::FoldingSetNodeID &ID); 3537 static void Profile(llvm::FoldingSetNodeID &ID, 3538 const TemplateTypeParmType *Replaced, 3539 const TemplateArgument &ArgPack); 3540 3541 static bool classof(const Type *T) { 3542 return T->getTypeClass() == SubstTemplateTypeParmPack; 3543 } 3544}; 3545 3546/// \brief Represents a C++0x auto type. 3547/// 3548/// These types are usually a placeholder for a deduced type. However, within 3549/// templates and before the initializer is attached, there is no deduced type 3550/// and an auto type is type-dependent and canonical. 3551class AutoType : public Type, public llvm::FoldingSetNode { 3552 AutoType(QualType DeducedType) 3553 : Type(Auto, DeducedType.isNull() ? QualType(this, 0) : DeducedType, 3554 /*Dependent=*/DeducedType.isNull(), 3555 /*InstantiationDependent=*/DeducedType.isNull(), 3556 /*VariablyModified=*/false, /*ContainsParameterPack=*/false) { 3557 assert((DeducedType.isNull() || !DeducedType->isDependentType()) && 3558 "deduced a dependent type for auto"); 3559 } 3560 3561 friend class ASTContext; // ASTContext creates these 3562 3563public: 3564 bool isSugared() const { return isDeduced(); } 3565 QualType desugar() const { return getCanonicalTypeInternal(); } 3566 3567 QualType getDeducedType() const { 3568 return isDeduced() ? getCanonicalTypeInternal() : QualType(); 3569 } 3570 bool isDeduced() const { 3571 return !isDependentType(); 3572 } 3573 3574 void Profile(llvm::FoldingSetNodeID &ID) { 3575 Profile(ID, getDeducedType()); 3576 } 3577 3578 static void Profile(llvm::FoldingSetNodeID &ID, 3579 QualType Deduced) { 3580 ID.AddPointer(Deduced.getAsOpaquePtr()); 3581 } 3582 3583 static bool classof(const Type *T) { 3584 return T->getTypeClass() == Auto; 3585 } 3586}; 3587 3588/// \brief Represents a type template specialization; the template 3589/// must be a class template, a type alias template, or a template 3590/// template parameter. A template which cannot be resolved to one of 3591/// these, e.g. because it is written with a dependent scope 3592/// specifier, is instead represented as a 3593/// @c DependentTemplateSpecializationType. 3594/// 3595/// A non-dependent template specialization type is always "sugar", 3596/// typically for a @c RecordType. For example, a class template 3597/// specialization type of @c vector<int> will refer to a tag type for 3598/// the instantiation @c std::vector<int, std::allocator<int>> 3599/// 3600/// Template specializations are dependent if either the template or 3601/// any of the template arguments are dependent, in which case the 3602/// type may also be canonical. 3603/// 3604/// Instances of this type are allocated with a trailing array of 3605/// TemplateArguments, followed by a QualType representing the 3606/// non-canonical aliased type when the template is a type alias 3607/// template. 3608class TemplateSpecializationType 3609 : public Type, public llvm::FoldingSetNode { 3610 /// \brief The name of the template being specialized. This is 3611 /// either a TemplateName::Template (in which case it is a 3612 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a 3613 /// TypeAliasTemplateDecl*), a 3614 /// TemplateName::SubstTemplateTemplateParmPack, or a 3615 /// TemplateName::SubstTemplateTemplateParm (in which case the 3616 /// replacement must, recursively, be one of these). 3617 TemplateName Template; 3618 3619 /// \brief - The number of template arguments named in this class 3620 /// template specialization. 3621 unsigned NumArgs : 31; 3622 3623 /// \brief Whether this template specialization type is a substituted 3624 /// type alias. 3625 bool TypeAlias : 1; 3626 3627 TemplateSpecializationType(TemplateName T, 3628 const TemplateArgument *Args, 3629 unsigned NumArgs, QualType Canon, 3630 QualType Aliased); 3631 3632 friend class ASTContext; // ASTContext creates these 3633 3634public: 3635 /// \brief Determine whether any of the given template arguments are 3636 /// dependent. 3637 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 3638 unsigned NumArgs, 3639 bool &InstantiationDependent); 3640 3641 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 3642 unsigned NumArgs, 3643 bool &InstantiationDependent); 3644 3645 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, 3646 bool &InstantiationDependent); 3647 3648 /// \brief Print a template argument list, including the '<' and '>' 3649 /// enclosing the template arguments. 3650 // FIXME: remove the string ones. 3651 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 3652 unsigned NumArgs, 3653 const PrintingPolicy &Policy, 3654 bool SkipBrackets = false); 3655 3656 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 3657 unsigned NumArgs, 3658 const PrintingPolicy &Policy); 3659 3660 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 3661 const PrintingPolicy &Policy); 3662 3663 /// \brief Print a template argument list, including the '<' and '>' 3664 /// enclosing the template arguments. 3665 static void PrintTemplateArgumentList(raw_ostream &OS, 3666 const TemplateArgument *Args, 3667 unsigned NumArgs, 3668 const PrintingPolicy &Policy, 3669 bool SkipBrackets = false); 3670 3671 static void PrintTemplateArgumentList(raw_ostream &OS, 3672 const TemplateArgumentLoc *Args, 3673 unsigned NumArgs, 3674 const PrintingPolicy &Policy); 3675 3676 static void PrintTemplateArgumentList(raw_ostream &OS, 3677 const TemplateArgumentListInfo &, 3678 const PrintingPolicy &Policy); 3679 3680 /// True if this template specialization type matches a current 3681 /// instantiation in the context in which it is found. 3682 bool isCurrentInstantiation() const { 3683 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 3684 } 3685 3686 /// \brief Determine if this template specialization type is for a type alias 3687 /// template that has been substituted. 3688 /// 3689 /// Nearly every template specialization type whose template is an alias 3690 /// template will be substituted. However, this is not the case when 3691 /// the specialization contains a pack expansion but the template alias 3692 /// does not have a corresponding parameter pack, e.g., 3693 /// 3694 /// \code 3695 /// template<typename T, typename U, typename V> struct S; 3696 /// template<typename T, typename U> using A = S<T, int, U>; 3697 /// template<typename... Ts> struct X { 3698 /// typedef A<Ts...> type; // not a type alias 3699 /// }; 3700 /// \endcode 3701 bool isTypeAlias() const { return TypeAlias; } 3702 3703 /// Get the aliased type, if this is a specialization of a type alias 3704 /// template. 3705 QualType getAliasedType() const { 3706 assert(isTypeAlias() && "not a type alias template specialization"); 3707 return *reinterpret_cast<const QualType*>(end()); 3708 } 3709 3710 typedef const TemplateArgument * iterator; 3711 3712 iterator begin() const { return getArgs(); } 3713 iterator end() const; // defined inline in TemplateBase.h 3714 3715 /// \brief Retrieve the name of the template that we are specializing. 3716 TemplateName getTemplateName() const { return Template; } 3717 3718 /// \brief Retrieve the template arguments. 3719 const TemplateArgument *getArgs() const { 3720 return reinterpret_cast<const TemplateArgument *>(this + 1); 3721 } 3722 3723 /// \brief Retrieve the number of template arguments. 3724 unsigned getNumArgs() const { return NumArgs; } 3725 3726 /// \brief Retrieve a specific template argument as a type. 3727 /// \pre @c isArgType(Arg) 3728 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3729 3730 bool isSugared() const { 3731 return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); 3732 } 3733 QualType desugar() const { return getCanonicalTypeInternal(); } 3734 3735 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { 3736 Profile(ID, Template, getArgs(), NumArgs, Ctx); 3737 if (isTypeAlias()) 3738 getAliasedType().Profile(ID); 3739 } 3740 3741 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 3742 const TemplateArgument *Args, 3743 unsigned NumArgs, 3744 const ASTContext &Context); 3745 3746 static bool classof(const Type *T) { 3747 return T->getTypeClass() == TemplateSpecialization; 3748 } 3749}; 3750 3751/// \brief The injected class name of a C++ class template or class 3752/// template partial specialization. Used to record that a type was 3753/// spelled with a bare identifier rather than as a template-id; the 3754/// equivalent for non-templated classes is just RecordType. 3755/// 3756/// Injected class name types are always dependent. Template 3757/// instantiation turns these into RecordTypes. 3758/// 3759/// Injected class name types are always canonical. This works 3760/// because it is impossible to compare an injected class name type 3761/// with the corresponding non-injected template type, for the same 3762/// reason that it is impossible to directly compare template 3763/// parameters from different dependent contexts: injected class name 3764/// types can only occur within the scope of a particular templated 3765/// declaration, and within that scope every template specialization 3766/// will canonicalize to the injected class name (when appropriate 3767/// according to the rules of the language). 3768class InjectedClassNameType : public Type { 3769 CXXRecordDecl *Decl; 3770 3771 /// The template specialization which this type represents. 3772 /// For example, in 3773 /// template <class T> class A { ... }; 3774 /// this is A<T>, whereas in 3775 /// template <class X, class Y> class A<B<X,Y> > { ... }; 3776 /// this is A<B<X,Y> >. 3777 /// 3778 /// It is always unqualified, always a template specialization type, 3779 /// and always dependent. 3780 QualType InjectedType; 3781 3782 friend class ASTContext; // ASTContext creates these. 3783 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 3784 // currently suitable for AST reading, too much 3785 // interdependencies. 3786 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 3787 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 3788 /*InstantiationDependent=*/true, 3789 /*VariablyModified=*/false, 3790 /*ContainsUnexpandedParameterPack=*/false), 3791 Decl(D), InjectedType(TST) { 3792 assert(isa<TemplateSpecializationType>(TST)); 3793 assert(!TST.hasQualifiers()); 3794 assert(TST->isDependentType()); 3795 } 3796 3797public: 3798 QualType getInjectedSpecializationType() const { return InjectedType; } 3799 const TemplateSpecializationType *getInjectedTST() const { 3800 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 3801 } 3802 3803 CXXRecordDecl *getDecl() const; 3804 3805 bool isSugared() const { return false; } 3806 QualType desugar() const { return QualType(this, 0); } 3807 3808 static bool classof(const Type *T) { 3809 return T->getTypeClass() == InjectedClassName; 3810 } 3811}; 3812 3813/// \brief The kind of a tag type. 3814enum TagTypeKind { 3815 /// \brief The "struct" keyword. 3816 TTK_Struct, 3817 /// \brief The "__interface" keyword. 3818 TTK_Interface, 3819 /// \brief The "union" keyword. 3820 TTK_Union, 3821 /// \brief The "class" keyword. 3822 TTK_Class, 3823 /// \brief The "enum" keyword. 3824 TTK_Enum 3825}; 3826 3827/// \brief The elaboration keyword that precedes a qualified type name or 3828/// introduces an elaborated-type-specifier. 3829enum ElaboratedTypeKeyword { 3830 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 3831 ETK_Struct, 3832 /// \brief The "__interface" keyword introduces the elaborated-type-specifier. 3833 ETK_Interface, 3834 /// \brief The "union" keyword introduces the elaborated-type-specifier. 3835 ETK_Union, 3836 /// \brief The "class" keyword introduces the elaborated-type-specifier. 3837 ETK_Class, 3838 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 3839 ETK_Enum, 3840 /// \brief The "typename" keyword precedes the qualified type name, e.g., 3841 /// \c typename T::type. 3842 ETK_Typename, 3843 /// \brief No keyword precedes the qualified type name. 3844 ETK_None 3845}; 3846 3847/// A helper class for Type nodes having an ElaboratedTypeKeyword. 3848/// The keyword in stored in the free bits of the base class. 3849/// Also provides a few static helpers for converting and printing 3850/// elaborated type keyword and tag type kind enumerations. 3851class TypeWithKeyword : public Type { 3852protected: 3853 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 3854 QualType Canonical, bool Dependent, 3855 bool InstantiationDependent, bool VariablyModified, 3856 bool ContainsUnexpandedParameterPack) 3857 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, 3858 ContainsUnexpandedParameterPack) { 3859 TypeWithKeywordBits.Keyword = Keyword; 3860 } 3861 3862public: 3863 ElaboratedTypeKeyword getKeyword() const { 3864 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 3865 } 3866 3867 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 3868 /// into an elaborated type keyword. 3869 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 3870 3871 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 3872 /// into a tag type kind. It is an error to provide a type specifier 3873 /// which *isn't* a tag kind here. 3874 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 3875 3876 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 3877 /// elaborated type keyword. 3878 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 3879 3880 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 3881 // a TagTypeKind. It is an error to provide an elaborated type keyword 3882 /// which *isn't* a tag kind here. 3883 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 3884 3885 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 3886 3887 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 3888 3889 static const char *getTagTypeKindName(TagTypeKind Kind) { 3890 return getKeywordName(getKeywordForTagTypeKind(Kind)); 3891 } 3892 3893 class CannotCastToThisType {}; 3894 static CannotCastToThisType classof(const Type *); 3895}; 3896 3897/// \brief Represents a type that was referred to using an elaborated type 3898/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 3899/// or both. 3900/// 3901/// This type is used to keep track of a type name as written in the 3902/// source code, including tag keywords and any nested-name-specifiers. 3903/// The type itself is always "sugar", used to express what was written 3904/// in the source code but containing no additional semantic information. 3905class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 3906 3907 /// \brief The nested name specifier containing the qualifier. 3908 NestedNameSpecifier *NNS; 3909 3910 /// \brief The type that this qualified name refers to. 3911 QualType NamedType; 3912 3913 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3914 QualType NamedType, QualType CanonType) 3915 : TypeWithKeyword(Keyword, Elaborated, CanonType, 3916 NamedType->isDependentType(), 3917 NamedType->isInstantiationDependentType(), 3918 NamedType->isVariablyModifiedType(), 3919 NamedType->containsUnexpandedParameterPack()), 3920 NNS(NNS), NamedType(NamedType) { 3921 assert(!(Keyword == ETK_None && NNS == 0) && 3922 "ElaboratedType cannot have elaborated type keyword " 3923 "and name qualifier both null."); 3924 } 3925 3926 friend class ASTContext; // ASTContext creates these 3927 3928public: 3929 ~ElaboratedType(); 3930 3931 /// \brief Retrieve the qualification on this type. 3932 NestedNameSpecifier *getQualifier() const { return NNS; } 3933 3934 /// \brief Retrieve the type named by the qualified-id. 3935 QualType getNamedType() const { return NamedType; } 3936 3937 /// \brief Remove a single level of sugar. 3938 QualType desugar() const { return getNamedType(); } 3939 3940 /// \brief Returns whether this type directly provides sugar. 3941 bool isSugared() const { return true; } 3942 3943 void Profile(llvm::FoldingSetNodeID &ID) { 3944 Profile(ID, getKeyword(), NNS, NamedType); 3945 } 3946 3947 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3948 NestedNameSpecifier *NNS, QualType NamedType) { 3949 ID.AddInteger(Keyword); 3950 ID.AddPointer(NNS); 3951 NamedType.Profile(ID); 3952 } 3953 3954 static bool classof(const Type *T) { 3955 return T->getTypeClass() == Elaborated; 3956 } 3957}; 3958 3959/// \brief Represents a qualified type name for which the type name is 3960/// dependent. 3961/// 3962/// DependentNameType represents a class of dependent types that involve a 3963/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 3964/// name of a type. The DependentNameType may start with a "typename" (for a 3965/// typename-specifier), "class", "struct", "union", or "enum" (for a 3966/// dependent elaborated-type-specifier), or nothing (in contexts where we 3967/// know that we must be referring to a type, e.g., in a base class specifier). 3968class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 3969 3970 /// \brief The nested name specifier containing the qualifier. 3971 NestedNameSpecifier *NNS; 3972 3973 /// \brief The type that this typename specifier refers to. 3974 const IdentifierInfo *Name; 3975 3976 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 3977 const IdentifierInfo *Name, QualType CanonType) 3978 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 3979 /*InstantiationDependent=*/true, 3980 /*VariablyModified=*/false, 3981 NNS->containsUnexpandedParameterPack()), 3982 NNS(NNS), Name(Name) { 3983 assert(NNS->isDependent() && 3984 "DependentNameType requires a dependent nested-name-specifier"); 3985 } 3986 3987 friend class ASTContext; // ASTContext creates these 3988 3989public: 3990 /// \brief Retrieve the qualification on this type. 3991 NestedNameSpecifier *getQualifier() const { return NNS; } 3992 3993 /// \brief Retrieve the type named by the typename specifier as an 3994 /// identifier. 3995 /// 3996 /// This routine will return a non-NULL identifier pointer when the 3997 /// form of the original typename was terminated by an identifier, 3998 /// e.g., "typename T::type". 3999 const IdentifierInfo *getIdentifier() const { 4000 return Name; 4001 } 4002 4003 bool isSugared() const { return false; } 4004 QualType desugar() const { return QualType(this, 0); } 4005 4006 void Profile(llvm::FoldingSetNodeID &ID) { 4007 Profile(ID, getKeyword(), NNS, Name); 4008 } 4009 4010 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 4011 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 4012 ID.AddInteger(Keyword); 4013 ID.AddPointer(NNS); 4014 ID.AddPointer(Name); 4015 } 4016 4017 static bool classof(const Type *T) { 4018 return T->getTypeClass() == DependentName; 4019 } 4020}; 4021 4022/// DependentTemplateSpecializationType - Represents a template 4023/// specialization type whose template cannot be resolved, e.g. 4024/// A<T>::template B<T> 4025class DependentTemplateSpecializationType : 4026 public TypeWithKeyword, public llvm::FoldingSetNode { 4027 4028 /// \brief The nested name specifier containing the qualifier. 4029 NestedNameSpecifier *NNS; 4030 4031 /// \brief The identifier of the template. 4032 const IdentifierInfo *Name; 4033 4034 /// \brief - The number of template arguments named in this class 4035 /// template specialization. 4036 unsigned NumArgs; 4037 4038 const TemplateArgument *getArgBuffer() const { 4039 return reinterpret_cast<const TemplateArgument*>(this+1); 4040 } 4041 TemplateArgument *getArgBuffer() { 4042 return reinterpret_cast<TemplateArgument*>(this+1); 4043 } 4044 4045 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 4046 NestedNameSpecifier *NNS, 4047 const IdentifierInfo *Name, 4048 unsigned NumArgs, 4049 const TemplateArgument *Args, 4050 QualType Canon); 4051 4052 friend class ASTContext; // ASTContext creates these 4053 4054public: 4055 NestedNameSpecifier *getQualifier() const { return NNS; } 4056 const IdentifierInfo *getIdentifier() const { return Name; } 4057 4058 /// \brief Retrieve the template arguments. 4059 const TemplateArgument *getArgs() const { 4060 return getArgBuffer(); 4061 } 4062 4063 /// \brief Retrieve the number of template arguments. 4064 unsigned getNumArgs() const { return NumArgs; } 4065 4066 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 4067 4068 typedef const TemplateArgument * iterator; 4069 iterator begin() const { return getArgs(); } 4070 iterator end() const; // inline in TemplateBase.h 4071 4072 bool isSugared() const { return false; } 4073 QualType desugar() const { return QualType(this, 0); } 4074 4075 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { 4076 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 4077 } 4078 4079 static void Profile(llvm::FoldingSetNodeID &ID, 4080 const ASTContext &Context, 4081 ElaboratedTypeKeyword Keyword, 4082 NestedNameSpecifier *Qualifier, 4083 const IdentifierInfo *Name, 4084 unsigned NumArgs, 4085 const TemplateArgument *Args); 4086 4087 static bool classof(const Type *T) { 4088 return T->getTypeClass() == DependentTemplateSpecialization; 4089 } 4090}; 4091 4092/// \brief Represents a pack expansion of types. 4093/// 4094/// Pack expansions are part of C++0x variadic templates. A pack 4095/// expansion contains a pattern, which itself contains one or more 4096/// "unexpanded" parameter packs. When instantiated, a pack expansion 4097/// produces a series of types, each instantiated from the pattern of 4098/// the expansion, where the Ith instantiation of the pattern uses the 4099/// Ith arguments bound to each of the unexpanded parameter packs. The 4100/// pack expansion is considered to "expand" these unexpanded 4101/// parameter packs. 4102/// 4103/// \code 4104/// template<typename ...Types> struct tuple; 4105/// 4106/// template<typename ...Types> 4107/// struct tuple_of_references { 4108/// typedef tuple<Types&...> type; 4109/// }; 4110/// \endcode 4111/// 4112/// Here, the pack expansion \c Types&... is represented via a 4113/// PackExpansionType whose pattern is Types&. 4114class PackExpansionType : public Type, public llvm::FoldingSetNode { 4115 /// \brief The pattern of the pack expansion. 4116 QualType Pattern; 4117 4118 /// \brief The number of expansions that this pack expansion will 4119 /// generate when substituted (+1), or indicates that 4120 /// 4121 /// This field will only have a non-zero value when some of the parameter 4122 /// packs that occur within the pattern have been substituted but others have 4123 /// not. 4124 unsigned NumExpansions; 4125 4126 PackExpansionType(QualType Pattern, QualType Canon, 4127 llvm::Optional<unsigned> NumExpansions) 4128 : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(), 4129 /*InstantiationDependent=*/true, 4130 /*VariableModified=*/Pattern->isVariablyModifiedType(), 4131 /*ContainsUnexpandedParameterPack=*/false), 4132 Pattern(Pattern), 4133 NumExpansions(NumExpansions? *NumExpansions + 1: 0) { } 4134 4135 friend class ASTContext; // ASTContext creates these 4136 4137public: 4138 /// \brief Retrieve the pattern of this pack expansion, which is the 4139 /// type that will be repeatedly instantiated when instantiating the 4140 /// pack expansion itself. 4141 QualType getPattern() const { return Pattern; } 4142 4143 /// \brief Retrieve the number of expansions that this pack expansion will 4144 /// generate, if known. 4145 llvm::Optional<unsigned> getNumExpansions() const { 4146 if (NumExpansions) 4147 return NumExpansions - 1; 4148 4149 return llvm::Optional<unsigned>(); 4150 } 4151 4152 bool isSugared() const { return false; } 4153 QualType desugar() const { return QualType(this, 0); } 4154 4155 void Profile(llvm::FoldingSetNodeID &ID) { 4156 Profile(ID, getPattern(), getNumExpansions()); 4157 } 4158 4159 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, 4160 llvm::Optional<unsigned> NumExpansions) { 4161 ID.AddPointer(Pattern.getAsOpaquePtr()); 4162 ID.AddBoolean(NumExpansions); 4163 if (NumExpansions) 4164 ID.AddInteger(*NumExpansions); 4165 } 4166 4167 static bool classof(const Type *T) { 4168 return T->getTypeClass() == PackExpansion; 4169 } 4170}; 4171 4172/// ObjCObjectType - Represents a class type in Objective C. 4173/// Every Objective C type is a combination of a base type and a 4174/// list of protocols. 4175/// 4176/// Given the following declarations: 4177/// \code 4178/// \@class C; 4179/// \@protocol P; 4180/// \endcode 4181/// 4182/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 4183/// with base C and no protocols. 4184/// 4185/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 4186/// 4187/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 4188/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 4189/// and no protocols. 4190/// 4191/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 4192/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 4193/// this should get its own sugar class to better represent the source. 4194class ObjCObjectType : public Type { 4195 // ObjCObjectType.NumProtocols - the number of protocols stored 4196 // after the ObjCObjectPointerType node. 4197 // 4198 // These protocols are those written directly on the type. If 4199 // protocol qualifiers ever become additive, the iterators will need 4200 // to get kindof complicated. 4201 // 4202 // In the canonical object type, these are sorted alphabetically 4203 // and uniqued. 4204 4205 /// Either a BuiltinType or an InterfaceType or sugar for either. 4206 QualType BaseType; 4207 4208 ObjCProtocolDecl * const *getProtocolStorage() const { 4209 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 4210 } 4211 4212 ObjCProtocolDecl **getProtocolStorage(); 4213 4214protected: 4215 ObjCObjectType(QualType Canonical, QualType Base, 4216 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 4217 4218 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 4219 ObjCObjectType(enum Nonce_ObjCInterface) 4220 : Type(ObjCInterface, QualType(), false, false, false, false), 4221 BaseType(QualType(this_(), 0)) { 4222 ObjCObjectTypeBits.NumProtocols = 0; 4223 } 4224 4225public: 4226 /// getBaseType - Gets the base type of this object type. This is 4227 /// always (possibly sugar for) one of: 4228 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 4229 /// user, which is a typedef for an ObjCPointerType) 4230 /// - the 'Class' builtin type (same caveat) 4231 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 4232 QualType getBaseType() const { return BaseType; } 4233 4234 bool isObjCId() const { 4235 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 4236 } 4237 bool isObjCClass() const { 4238 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 4239 } 4240 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 4241 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 4242 bool isObjCUnqualifiedIdOrClass() const { 4243 if (!qual_empty()) return false; 4244 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 4245 return T->getKind() == BuiltinType::ObjCId || 4246 T->getKind() == BuiltinType::ObjCClass; 4247 return false; 4248 } 4249 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 4250 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 4251 4252 /// Gets the interface declaration for this object type, if the base type 4253 /// really is an interface. 4254 ObjCInterfaceDecl *getInterface() const; 4255 4256 typedef ObjCProtocolDecl * const *qual_iterator; 4257 4258 qual_iterator qual_begin() const { return getProtocolStorage(); } 4259 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 4260 4261 bool qual_empty() const { return getNumProtocols() == 0; } 4262 4263 /// getNumProtocols - Return the number of qualifying protocols in this 4264 /// interface type, or 0 if there are none. 4265 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 4266 4267 /// \brief Fetch a protocol by index. 4268 ObjCProtocolDecl *getProtocol(unsigned I) const { 4269 assert(I < getNumProtocols() && "Out-of-range protocol access"); 4270 return qual_begin()[I]; 4271 } 4272 4273 bool isSugared() const { return false; } 4274 QualType desugar() const { return QualType(this, 0); } 4275 4276 static bool classof(const Type *T) { 4277 return T->getTypeClass() == ObjCObject || 4278 T->getTypeClass() == ObjCInterface; 4279 } 4280}; 4281 4282/// ObjCObjectTypeImpl - A class providing a concrete implementation 4283/// of ObjCObjectType, so as to not increase the footprint of 4284/// ObjCInterfaceType. Code outside of ASTContext and the core type 4285/// system should not reference this type. 4286class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 4287 friend class ASTContext; 4288 4289 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 4290 // will need to be modified. 4291 4292 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 4293 ObjCProtocolDecl * const *Protocols, 4294 unsigned NumProtocols) 4295 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 4296 4297public: 4298 void Profile(llvm::FoldingSetNodeID &ID); 4299 static void Profile(llvm::FoldingSetNodeID &ID, 4300 QualType Base, 4301 ObjCProtocolDecl *const *protocols, 4302 unsigned NumProtocols); 4303}; 4304 4305inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 4306 return reinterpret_cast<ObjCProtocolDecl**>( 4307 static_cast<ObjCObjectTypeImpl*>(this) + 1); 4308} 4309 4310/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 4311/// object oriented design. They basically correspond to C++ classes. There 4312/// are two kinds of interface types, normal interfaces like "NSString" and 4313/// qualified interfaces, which are qualified with a protocol list like 4314/// "NSString<NSCopyable, NSAmazing>". 4315/// 4316/// ObjCInterfaceType guarantees the following properties when considered 4317/// as a subtype of its superclass, ObjCObjectType: 4318/// - There are no protocol qualifiers. To reinforce this, code which 4319/// tries to invoke the protocol methods via an ObjCInterfaceType will 4320/// fail to compile. 4321/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 4322/// T->getBaseType() == QualType(T, 0). 4323class ObjCInterfaceType : public ObjCObjectType { 4324 mutable ObjCInterfaceDecl *Decl; 4325 4326 ObjCInterfaceType(const ObjCInterfaceDecl *D) 4327 : ObjCObjectType(Nonce_ObjCInterface), 4328 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 4329 friend class ASTContext; // ASTContext creates these. 4330 friend class ASTReader; 4331 friend class ObjCInterfaceDecl; 4332 4333public: 4334 /// getDecl - Get the declaration of this interface. 4335 ObjCInterfaceDecl *getDecl() const { return Decl; } 4336 4337 bool isSugared() const { return false; } 4338 QualType desugar() const { return QualType(this, 0); } 4339 4340 static bool classof(const Type *T) { 4341 return T->getTypeClass() == ObjCInterface; 4342 } 4343 4344 // Nonsense to "hide" certain members of ObjCObjectType within this 4345 // class. People asking for protocols on an ObjCInterfaceType are 4346 // not going to get what they want: ObjCInterfaceTypes are 4347 // guaranteed to have no protocols. 4348 enum { 4349 qual_iterator, 4350 qual_begin, 4351 qual_end, 4352 getNumProtocols, 4353 getProtocol 4354 }; 4355}; 4356 4357inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 4358 if (const ObjCInterfaceType *T = 4359 getBaseType()->getAs<ObjCInterfaceType>()) 4360 return T->getDecl(); 4361 return 0; 4362} 4363 4364/// ObjCObjectPointerType - Used to represent a pointer to an 4365/// Objective C object. These are constructed from pointer 4366/// declarators when the pointee type is an ObjCObjectType (or sugar 4367/// for one). In addition, the 'id' and 'Class' types are typedefs 4368/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 4369/// are translated into these. 4370/// 4371/// Pointers to pointers to Objective C objects are still PointerTypes; 4372/// only the first level of pointer gets it own type implementation. 4373class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 4374 QualType PointeeType; 4375 4376 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 4377 : Type(ObjCObjectPointer, Canonical, false, false, false, false), 4378 PointeeType(Pointee) {} 4379 friend class ASTContext; // ASTContext creates these. 4380 4381public: 4382 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 4383 /// The result will always be an ObjCObjectType or sugar thereof. 4384 QualType getPointeeType() const { return PointeeType; } 4385 4386 /// getObjCObjectType - Gets the type pointed to by this ObjC 4387 /// pointer. This method always returns non-null. 4388 /// 4389 /// This method is equivalent to getPointeeType() except that 4390 /// it discards any typedefs (or other sugar) between this 4391 /// type and the "outermost" object type. So for: 4392 /// \code 4393 /// \@class A; \@protocol P; \@protocol Q; 4394 /// typedef A<P> AP; 4395 /// typedef A A1; 4396 /// typedef A1<P> A1P; 4397 /// typedef A1P<Q> A1PQ; 4398 /// \endcode 4399 /// For 'A*', getObjectType() will return 'A'. 4400 /// For 'A<P>*', getObjectType() will return 'A<P>'. 4401 /// For 'AP*', getObjectType() will return 'A<P>'. 4402 /// For 'A1*', getObjectType() will return 'A'. 4403 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 4404 /// For 'A1P*', getObjectType() will return 'A1<P>'. 4405 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 4406 /// adding protocols to a protocol-qualified base discards the 4407 /// old qualifiers (for now). But if it didn't, getObjectType() 4408 /// would return 'A1P<Q>' (and we'd have to make iterating over 4409 /// qualifiers more complicated). 4410 const ObjCObjectType *getObjectType() const { 4411 return PointeeType->castAs<ObjCObjectType>(); 4412 } 4413 4414 /// getInterfaceType - If this pointer points to an Objective C 4415 /// \@interface type, gets the type for that interface. Any protocol 4416 /// qualifiers on the interface are ignored. 4417 /// 4418 /// \return null if the base type for this pointer is 'id' or 'Class' 4419 const ObjCInterfaceType *getInterfaceType() const { 4420 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 4421 } 4422 4423 /// getInterfaceDecl - If this pointer points to an Objective \@interface 4424 /// type, gets the declaration for that interface. 4425 /// 4426 /// \return null if the base type for this pointer is 'id' or 'Class' 4427 ObjCInterfaceDecl *getInterfaceDecl() const { 4428 return getObjectType()->getInterface(); 4429 } 4430 4431 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 4432 /// its object type is the primitive 'id' type with no protocols. 4433 bool isObjCIdType() const { 4434 return getObjectType()->isObjCUnqualifiedId(); 4435 } 4436 4437 /// isObjCClassType - True if this is equivalent to the 'Class' type, 4438 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 4439 bool isObjCClassType() const { 4440 return getObjectType()->isObjCUnqualifiedClass(); 4441 } 4442 4443 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 4444 /// non-empty set of protocols. 4445 bool isObjCQualifiedIdType() const { 4446 return getObjectType()->isObjCQualifiedId(); 4447 } 4448 4449 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 4450 /// some non-empty set of protocols. 4451 bool isObjCQualifiedClassType() const { 4452 return getObjectType()->isObjCQualifiedClass(); 4453 } 4454 4455 /// An iterator over the qualifiers on the object type. Provided 4456 /// for convenience. This will always iterate over the full set of 4457 /// protocols on a type, not just those provided directly. 4458 typedef ObjCObjectType::qual_iterator qual_iterator; 4459 4460 qual_iterator qual_begin() const { 4461 return getObjectType()->qual_begin(); 4462 } 4463 qual_iterator qual_end() const { 4464 return getObjectType()->qual_end(); 4465 } 4466 bool qual_empty() const { return getObjectType()->qual_empty(); } 4467 4468 /// getNumProtocols - Return the number of qualifying protocols on 4469 /// the object type. 4470 unsigned getNumProtocols() const { 4471 return getObjectType()->getNumProtocols(); 4472 } 4473 4474 /// \brief Retrieve a qualifying protocol by index on the object 4475 /// type. 4476 ObjCProtocolDecl *getProtocol(unsigned I) const { 4477 return getObjectType()->getProtocol(I); 4478 } 4479 4480 bool isSugared() const { return false; } 4481 QualType desugar() const { return QualType(this, 0); } 4482 4483 void Profile(llvm::FoldingSetNodeID &ID) { 4484 Profile(ID, getPointeeType()); 4485 } 4486 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4487 ID.AddPointer(T.getAsOpaquePtr()); 4488 } 4489 static bool classof(const Type *T) { 4490 return T->getTypeClass() == ObjCObjectPointer; 4491 } 4492}; 4493 4494class AtomicType : public Type, public llvm::FoldingSetNode { 4495 QualType ValueType; 4496 4497 AtomicType(QualType ValTy, QualType Canonical) 4498 : Type(Atomic, Canonical, ValTy->isDependentType(), 4499 ValTy->isInstantiationDependentType(), 4500 ValTy->isVariablyModifiedType(), 4501 ValTy->containsUnexpandedParameterPack()), 4502 ValueType(ValTy) {} 4503 friend class ASTContext; // ASTContext creates these. 4504 4505 public: 4506 /// getValueType - Gets the type contained by this atomic type, i.e. 4507 /// the type returned by performing an atomic load of this atomic type. 4508 QualType getValueType() const { return ValueType; } 4509 4510 bool isSugared() const { return false; } 4511 QualType desugar() const { return QualType(this, 0); } 4512 4513 void Profile(llvm::FoldingSetNodeID &ID) { 4514 Profile(ID, getValueType()); 4515 } 4516 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 4517 ID.AddPointer(T.getAsOpaquePtr()); 4518 } 4519 static bool classof(const Type *T) { 4520 return T->getTypeClass() == Atomic; 4521 } 4522}; 4523 4524/// A qualifier set is used to build a set of qualifiers. 4525class QualifierCollector : public Qualifiers { 4526public: 4527 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 4528 4529 /// Collect any qualifiers on the given type and return an 4530 /// unqualified type. The qualifiers are assumed to be consistent 4531 /// with those already in the type. 4532 const Type *strip(QualType type) { 4533 addFastQualifiers(type.getLocalFastQualifiers()); 4534 if (!type.hasLocalNonFastQualifiers()) 4535 return type.getTypePtrUnsafe(); 4536 4537 const ExtQuals *extQuals = type.getExtQualsUnsafe(); 4538 addConsistentQualifiers(extQuals->getQualifiers()); 4539 return extQuals->getBaseType(); 4540 } 4541 4542 /// Apply the collected qualifiers to the given type. 4543 QualType apply(const ASTContext &Context, QualType QT) const; 4544 4545 /// Apply the collected qualifiers to the given type. 4546 QualType apply(const ASTContext &Context, const Type* T) const; 4547}; 4548 4549 4550// Inline function definitions. 4551 4552inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { 4553 SplitQualType desugar = 4554 Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); 4555 desugar.Quals.addConsistentQualifiers(Quals); 4556 return desugar; 4557} 4558 4559inline const Type *QualType::getTypePtr() const { 4560 return getCommonPtr()->BaseType; 4561} 4562 4563inline const Type *QualType::getTypePtrOrNull() const { 4564 return (isNull() ? 0 : getCommonPtr()->BaseType); 4565} 4566 4567inline SplitQualType QualType::split() const { 4568 if (!hasLocalNonFastQualifiers()) 4569 return SplitQualType(getTypePtrUnsafe(), 4570 Qualifiers::fromFastMask(getLocalFastQualifiers())); 4571 4572 const ExtQuals *eq = getExtQualsUnsafe(); 4573 Qualifiers qs = eq->getQualifiers(); 4574 qs.addFastQualifiers(getLocalFastQualifiers()); 4575 return SplitQualType(eq->getBaseType(), qs); 4576} 4577 4578inline Qualifiers QualType::getLocalQualifiers() const { 4579 Qualifiers Quals; 4580 if (hasLocalNonFastQualifiers()) 4581 Quals = getExtQualsUnsafe()->getQualifiers(); 4582 Quals.addFastQualifiers(getLocalFastQualifiers()); 4583 return Quals; 4584} 4585 4586inline Qualifiers QualType::getQualifiers() const { 4587 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); 4588 quals.addFastQualifiers(getLocalFastQualifiers()); 4589 return quals; 4590} 4591 4592inline unsigned QualType::getCVRQualifiers() const { 4593 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); 4594 cvr |= getLocalCVRQualifiers(); 4595 return cvr; 4596} 4597 4598inline QualType QualType::getCanonicalType() const { 4599 QualType canon = getCommonPtr()->CanonicalType; 4600 return canon.withFastQualifiers(getLocalFastQualifiers()); 4601} 4602 4603inline bool QualType::isCanonical() const { 4604 return getTypePtr()->isCanonicalUnqualified(); 4605} 4606 4607inline bool QualType::isCanonicalAsParam() const { 4608 if (!isCanonical()) return false; 4609 if (hasLocalQualifiers()) return false; 4610 4611 const Type *T = getTypePtr(); 4612 if (T->isVariablyModifiedType() && T->hasSizedVLAType()) 4613 return false; 4614 4615 return !isa<FunctionType>(T) && !isa<ArrayType>(T); 4616} 4617 4618inline bool QualType::isConstQualified() const { 4619 return isLocalConstQualified() || 4620 getCommonPtr()->CanonicalType.isLocalConstQualified(); 4621} 4622 4623inline bool QualType::isRestrictQualified() const { 4624 return isLocalRestrictQualified() || 4625 getCommonPtr()->CanonicalType.isLocalRestrictQualified(); 4626} 4627 4628 4629inline bool QualType::isVolatileQualified() const { 4630 return isLocalVolatileQualified() || 4631 getCommonPtr()->CanonicalType.isLocalVolatileQualified(); 4632} 4633 4634inline bool QualType::hasQualifiers() const { 4635 return hasLocalQualifiers() || 4636 getCommonPtr()->CanonicalType.hasLocalQualifiers(); 4637} 4638 4639inline QualType QualType::getUnqualifiedType() const { 4640 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4641 return QualType(getTypePtr(), 0); 4642 4643 return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); 4644} 4645 4646inline SplitQualType QualType::getSplitUnqualifiedType() const { 4647 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) 4648 return split(); 4649 4650 return getSplitUnqualifiedTypeImpl(*this); 4651} 4652 4653inline void QualType::removeLocalConst() { 4654 removeLocalFastQualifiers(Qualifiers::Const); 4655} 4656 4657inline void QualType::removeLocalRestrict() { 4658 removeLocalFastQualifiers(Qualifiers::Restrict); 4659} 4660 4661inline void QualType::removeLocalVolatile() { 4662 removeLocalFastQualifiers(Qualifiers::Volatile); 4663} 4664 4665inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 4666 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 4667 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 4668 4669 // Fast path: we don't need to touch the slow qualifiers. 4670 removeLocalFastQualifiers(Mask); 4671} 4672 4673/// getAddressSpace - Return the address space of this type. 4674inline unsigned QualType::getAddressSpace() const { 4675 return getQualifiers().getAddressSpace(); 4676} 4677 4678/// getObjCGCAttr - Return the gc attribute of this type. 4679inline Qualifiers::GC QualType::getObjCGCAttr() const { 4680 return getQualifiers().getObjCGCAttr(); 4681} 4682 4683inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 4684 if (const PointerType *PT = t.getAs<PointerType>()) { 4685 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 4686 return FT->getExtInfo(); 4687 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 4688 return FT->getExtInfo(); 4689 4690 return FunctionType::ExtInfo(); 4691} 4692 4693inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 4694 return getFunctionExtInfo(*t); 4695} 4696 4697/// isMoreQualifiedThan - Determine whether this type is more 4698/// qualified than the Other type. For example, "const volatile int" 4699/// is more qualified than "const int", "volatile int", and 4700/// "int". However, it is not more qualified than "const volatile 4701/// int". 4702inline bool QualType::isMoreQualifiedThan(QualType other) const { 4703 Qualifiers myQuals = getQualifiers(); 4704 Qualifiers otherQuals = other.getQualifiers(); 4705 return (myQuals != otherQuals && myQuals.compatiblyIncludes(otherQuals)); 4706} 4707 4708/// isAtLeastAsQualifiedAs - Determine whether this type is at last 4709/// as qualified as the Other type. For example, "const volatile 4710/// int" is at least as qualified as "const int", "volatile int", 4711/// "int", and "const volatile int". 4712inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { 4713 return getQualifiers().compatiblyIncludes(other.getQualifiers()); 4714} 4715 4716/// getNonReferenceType - If Type is a reference type (e.g., const 4717/// int&), returns the type that the reference refers to ("const 4718/// int"). Otherwise, returns the type itself. This routine is used 4719/// throughout Sema to implement C++ 5p6: 4720/// 4721/// If an expression initially has the type "reference to T" (8.3.2, 4722/// 8.5.3), the type is adjusted to "T" prior to any further 4723/// analysis, the expression designates the object or function 4724/// denoted by the reference, and the expression is an lvalue. 4725inline QualType QualType::getNonReferenceType() const { 4726 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 4727 return RefType->getPointeeType(); 4728 else 4729 return *this; 4730} 4731 4732inline bool QualType::isCForbiddenLValueType() const { 4733 return ((getTypePtr()->isVoidType() && !hasQualifiers()) || 4734 getTypePtr()->isFunctionType()); 4735} 4736 4737/// \brief Tests whether the type is categorized as a fundamental type. 4738/// 4739/// \returns True for types specified in C++0x [basic.fundamental]. 4740inline bool Type::isFundamentalType() const { 4741 return isVoidType() || 4742 // FIXME: It's really annoying that we don't have an 4743 // 'isArithmeticType()' which agrees with the standard definition. 4744 (isArithmeticType() && !isEnumeralType()); 4745} 4746 4747/// \brief Tests whether the type is categorized as a compound type. 4748/// 4749/// \returns True for types specified in C++0x [basic.compound]. 4750inline bool Type::isCompoundType() const { 4751 // C++0x [basic.compound]p1: 4752 // Compound types can be constructed in the following ways: 4753 // -- arrays of objects of a given type [...]; 4754 return isArrayType() || 4755 // -- functions, which have parameters of given types [...]; 4756 isFunctionType() || 4757 // -- pointers to void or objects or functions [...]; 4758 isPointerType() || 4759 // -- references to objects or functions of a given type. [...] 4760 isReferenceType() || 4761 // -- classes containing a sequence of objects of various types, [...]; 4762 isRecordType() || 4763 // -- unions, which are classes capable of containing objects of different 4764 // types at different times; 4765 isUnionType() || 4766 // -- enumerations, which comprise a set of named constant values. [...]; 4767 isEnumeralType() || 4768 // -- pointers to non-static class members, [...]. 4769 isMemberPointerType(); 4770} 4771 4772inline bool Type::isFunctionType() const { 4773 return isa<FunctionType>(CanonicalType); 4774} 4775inline bool Type::isPointerType() const { 4776 return isa<PointerType>(CanonicalType); 4777} 4778inline bool Type::isAnyPointerType() const { 4779 return isPointerType() || isObjCObjectPointerType(); 4780} 4781inline bool Type::isBlockPointerType() const { 4782 return isa<BlockPointerType>(CanonicalType); 4783} 4784inline bool Type::isReferenceType() const { 4785 return isa<ReferenceType>(CanonicalType); 4786} 4787inline bool Type::isLValueReferenceType() const { 4788 return isa<LValueReferenceType>(CanonicalType); 4789} 4790inline bool Type::isRValueReferenceType() const { 4791 return isa<RValueReferenceType>(CanonicalType); 4792} 4793inline bool Type::isFunctionPointerType() const { 4794 if (const PointerType *T = getAs<PointerType>()) 4795 return T->getPointeeType()->isFunctionType(); 4796 else 4797 return false; 4798} 4799inline bool Type::isMemberPointerType() const { 4800 return isa<MemberPointerType>(CanonicalType); 4801} 4802inline bool Type::isMemberFunctionPointerType() const { 4803 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4804 return T->isMemberFunctionPointer(); 4805 else 4806 return false; 4807} 4808inline bool Type::isMemberDataPointerType() const { 4809 if (const MemberPointerType* T = getAs<MemberPointerType>()) 4810 return T->isMemberDataPointer(); 4811 else 4812 return false; 4813} 4814inline bool Type::isArrayType() const { 4815 return isa<ArrayType>(CanonicalType); 4816} 4817inline bool Type::isConstantArrayType() const { 4818 return isa<ConstantArrayType>(CanonicalType); 4819} 4820inline bool Type::isIncompleteArrayType() const { 4821 return isa<IncompleteArrayType>(CanonicalType); 4822} 4823inline bool Type::isVariableArrayType() const { 4824 return isa<VariableArrayType>(CanonicalType); 4825} 4826inline bool Type::isDependentSizedArrayType() const { 4827 return isa<DependentSizedArrayType>(CanonicalType); 4828} 4829inline bool Type::isBuiltinType() const { 4830 return isa<BuiltinType>(CanonicalType); 4831} 4832inline bool Type::isRecordType() const { 4833 return isa<RecordType>(CanonicalType); 4834} 4835inline bool Type::isEnumeralType() const { 4836 return isa<EnumType>(CanonicalType); 4837} 4838inline bool Type::isAnyComplexType() const { 4839 return isa<ComplexType>(CanonicalType); 4840} 4841inline bool Type::isVectorType() const { 4842 return isa<VectorType>(CanonicalType); 4843} 4844inline bool Type::isExtVectorType() const { 4845 return isa<ExtVectorType>(CanonicalType); 4846} 4847inline bool Type::isObjCObjectPointerType() const { 4848 return isa<ObjCObjectPointerType>(CanonicalType); 4849} 4850inline bool Type::isObjCObjectType() const { 4851 return isa<ObjCObjectType>(CanonicalType); 4852} 4853inline bool Type::isObjCObjectOrInterfaceType() const { 4854 return isa<ObjCInterfaceType>(CanonicalType) || 4855 isa<ObjCObjectType>(CanonicalType); 4856} 4857inline bool Type::isAtomicType() const { 4858 return isa<AtomicType>(CanonicalType); 4859} 4860 4861inline bool Type::isObjCQualifiedIdType() const { 4862 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4863 return OPT->isObjCQualifiedIdType(); 4864 return false; 4865} 4866inline bool Type::isObjCQualifiedClassType() const { 4867 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4868 return OPT->isObjCQualifiedClassType(); 4869 return false; 4870} 4871inline bool Type::isObjCIdType() const { 4872 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4873 return OPT->isObjCIdType(); 4874 return false; 4875} 4876inline bool Type::isObjCClassType() const { 4877 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 4878 return OPT->isObjCClassType(); 4879 return false; 4880} 4881inline bool Type::isObjCSelType() const { 4882 if (const PointerType *OPT = getAs<PointerType>()) 4883 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 4884 return false; 4885} 4886inline bool Type::isObjCBuiltinType() const { 4887 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 4888} 4889inline bool Type::isTemplateTypeParmType() const { 4890 return isa<TemplateTypeParmType>(CanonicalType); 4891} 4892 4893inline bool Type::isSpecificBuiltinType(unsigned K) const { 4894 if (const BuiltinType *BT = getAs<BuiltinType>()) 4895 if (BT->getKind() == (BuiltinType::Kind) K) 4896 return true; 4897 return false; 4898} 4899 4900inline bool Type::isPlaceholderType() const { 4901 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4902 return BT->isPlaceholderType(); 4903 return false; 4904} 4905 4906inline const BuiltinType *Type::getAsPlaceholderType() const { 4907 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4908 if (BT->isPlaceholderType()) 4909 return BT; 4910 return 0; 4911} 4912 4913inline bool Type::isSpecificPlaceholderType(unsigned K) const { 4914 assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)); 4915 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4916 return (BT->getKind() == (BuiltinType::Kind) K); 4917 return false; 4918} 4919 4920inline bool Type::isNonOverloadPlaceholderType() const { 4921 if (const BuiltinType *BT = dyn_cast<BuiltinType>(this)) 4922 return BT->isNonOverloadPlaceholderType(); 4923 return false; 4924} 4925 4926inline bool Type::isVoidType() const { 4927 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4928 return BT->getKind() == BuiltinType::Void; 4929 return false; 4930} 4931 4932inline bool Type::isHalfType() const { 4933 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4934 return BT->getKind() == BuiltinType::Half; 4935 // FIXME: Should we allow complex __fp16? Probably not. 4936 return false; 4937} 4938 4939inline bool Type::isNullPtrType() const { 4940 if (const BuiltinType *BT = getAs<BuiltinType>()) 4941 return BT->getKind() == BuiltinType::NullPtr; 4942 return false; 4943} 4944 4945extern bool IsEnumDeclComplete(EnumDecl *); 4946extern bool IsEnumDeclScoped(EnumDecl *); 4947 4948inline bool Type::isIntegerType() const { 4949 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4950 return BT->getKind() >= BuiltinType::Bool && 4951 BT->getKind() <= BuiltinType::Int128; 4952 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { 4953 // Incomplete enum types are not treated as integer types. 4954 // FIXME: In C++, enum types are never integer types. 4955 return IsEnumDeclComplete(ET->getDecl()) && 4956 !IsEnumDeclScoped(ET->getDecl()); 4957 } 4958 return false; 4959} 4960 4961inline bool Type::isScalarType() const { 4962 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4963 return BT->getKind() > BuiltinType::Void && 4964 BT->getKind() <= BuiltinType::NullPtr; 4965 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 4966 // Enums are scalar types, but only if they are defined. Incomplete enums 4967 // are not treated as scalar types. 4968 return IsEnumDeclComplete(ET->getDecl()); 4969 return isa<PointerType>(CanonicalType) || 4970 isa<BlockPointerType>(CanonicalType) || 4971 isa<MemberPointerType>(CanonicalType) || 4972 isa<ComplexType>(CanonicalType) || 4973 isa<ObjCObjectPointerType>(CanonicalType); 4974} 4975 4976inline bool Type::isIntegralOrEnumerationType() const { 4977 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4978 return BT->getKind() >= BuiltinType::Bool && 4979 BT->getKind() <= BuiltinType::Int128; 4980 4981 // Check for a complete enum type; incomplete enum types are not properly an 4982 // enumeration type in the sense required here. 4983 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) 4984 return IsEnumDeclComplete(ET->getDecl()); 4985 4986 return false; 4987} 4988 4989inline bool Type::isBooleanType() const { 4990 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CanonicalType)) 4991 return BT->getKind() == BuiltinType::Bool; 4992 return false; 4993} 4994 4995/// \brief Determines whether this is a type for which one can define 4996/// an overloaded operator. 4997inline bool Type::isOverloadableType() const { 4998 return isDependentType() || isRecordType() || isEnumeralType(); 4999} 5000 5001/// \brief Determines whether this type can decay to a pointer type. 5002inline bool Type::canDecayToPointerType() const { 5003 return isFunctionType() || isArrayType(); 5004} 5005 5006inline bool Type::hasPointerRepresentation() const { 5007 return (isPointerType() || isReferenceType() || isBlockPointerType() || 5008 isObjCObjectPointerType() || isNullPtrType()); 5009} 5010 5011inline bool Type::hasObjCPointerRepresentation() const { 5012 return isObjCObjectPointerType(); 5013} 5014 5015inline const Type *Type::getBaseElementTypeUnsafe() const { 5016 const Type *type = this; 5017 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) 5018 type = arrayType->getElementType().getTypePtr(); 5019 return type; 5020} 5021 5022/// Insertion operator for diagnostics. This allows sending QualType's into a 5023/// diagnostic with <<. 5024inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 5025 QualType T) { 5026 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5027 DiagnosticsEngine::ak_qualtype); 5028 return DB; 5029} 5030 5031/// Insertion operator for partial diagnostics. This allows sending QualType's 5032/// into a diagnostic with <<. 5033inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 5034 QualType T) { 5035 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 5036 DiagnosticsEngine::ak_qualtype); 5037 return PD; 5038} 5039 5040// Helper class template that is used by Type::getAs to ensure that one does 5041// not try to look through a qualified type to get to an array type. 5042template<typename T, 5043 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 5044 llvm::is_base_of<ArrayType, T>::value)> 5045struct ArrayType_cannot_be_used_with_getAs { }; 5046 5047template<typename T> 5048struct ArrayType_cannot_be_used_with_getAs<T, true>; 5049 5050// Member-template getAs<specific type>'. 5051template <typename T> const T *Type::getAs() const { 5052 ArrayType_cannot_be_used_with_getAs<T> at; 5053 (void)at; 5054 5055 // If this is directly a T type, return it. 5056 if (const T *Ty = dyn_cast<T>(this)) 5057 return Ty; 5058 5059 // If the canonical form of this type isn't the right kind, reject it. 5060 if (!isa<T>(CanonicalType)) 5061 return 0; 5062 5063 // If this is a typedef for the type, strip the typedef off without 5064 // losing all typedef information. 5065 return cast<T>(getUnqualifiedDesugaredType()); 5066} 5067 5068inline const ArrayType *Type::getAsArrayTypeUnsafe() const { 5069 // If this is directly an array type, return it. 5070 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) 5071 return arr; 5072 5073 // If the canonical form of this type isn't the right kind, reject it. 5074 if (!isa<ArrayType>(CanonicalType)) 5075 return 0; 5076 5077 // If this is a typedef for the type, strip the typedef off without 5078 // losing all typedef information. 5079 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5080} 5081 5082template <typename T> const T *Type::castAs() const { 5083 ArrayType_cannot_be_used_with_getAs<T> at; 5084 (void) at; 5085 5086 assert(isa<T>(CanonicalType)); 5087 if (const T *ty = dyn_cast<T>(this)) return ty; 5088 return cast<T>(getUnqualifiedDesugaredType()); 5089} 5090 5091inline const ArrayType *Type::castAsArrayTypeUnsafe() const { 5092 assert(isa<ArrayType>(CanonicalType)); 5093 if (const ArrayType *arr = dyn_cast<ArrayType>(this)) return arr; 5094 return cast<ArrayType>(getUnqualifiedDesugaredType()); 5095} 5096 5097} // end namespace clang 5098 5099#endif 5100