AST/Interp/Pointer.h

1 //===--- Pointer.h - Types for the constexpr VM -----------------*- C++ -*-===//
31 class Pointer;
39 class Pointer {
45   Pointer() {}
46   Pointer(Block *B);
47   Pointer(const Pointer &P);
48   Pointer(Pointer &&P);
49   ~Pointer();
51   void operator=(const Pointer &P);
52   void operator=(Pointer &&P);
58   Pointer atIndex(unsigned Idx) const {
60       return Pointer(Pointee, RootPtrMark, getDeclDesc()->getSize());
66     return Pointer(Pointee, Base, Base + Off);
70   Pointer atField(unsigned Off) const {
72     return Pointer(Pointee, Field, Field);
76   Pointer narrow() const {
81     // Pointer to an array of base types - enter block.
83       return Pointer(Pointee, 0, Offset == 0 ? Offset : PastEndMark);
85     // Pointer is one past end - magic offset marks that.
87       return Pointer(Pointee, Base, PastEndMark);
96       return Pointer(Pointee, Base, Offset + sizeof(InitMap *));
99     // Pointer is to a field or array element - enter it.
101       return Pointer(Pointee, Offset, Offset);
108     return Pointer(Pointee, NewBase, NewBase);
112   Pointer expand() const {
120       return Pointer(Pointee, Base, Base + getSize() + Adjust);
129       return Pointer(Pointee, RootPtrMark, 0);
136     return Pointer(Pointee, Next, Offset);
151   Pointer getBase() const {
154       return Pointer(Pointee, Base, 0);
158     return Pointer(Pointee, NewBase, NewBase);
161   Pointer getArray() const {
164       return Pointer(Pointee, Base, 0);
167     return Pointer(Pointee, Base, Base);
215   /// Pointer points directly to a block.
298   static bool hasSameBase(const Pointer &A, const Pointer &B);
300   static bool hasSameArray(const Pointer &A, const Pointer &B);
316   Pointer(Block *Pointee, unsigned Base, unsigned Offset);
340   Pointer *Prev = nullptr;
342   Pointer *Next = nullptr;
345 inline llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, const Pointer &P) {