WPILibC++  unspecified
 All Classes Files Functions Variables Typedefs Enumerations Enumerator Pages
PointerLikeTypeTraits.h
1 //===- llvm/Support/PointerLikeTypeTraits.h - Pointer Traits ----*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines the PointerLikeTypeTraits class. This allows data
11 // structures to reason about pointers and other things that are pointer sized.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_SUPPORT_POINTERLIKETYPETRAITS_H
16 #define LLVM_SUPPORT_POINTERLIKETYPETRAITS_H
17 
18 #include <cstdint>
19 
20 namespace llvm {
21 
25 template <typename T>
27  // getAsVoidPointer
28  // getFromVoidPointer
29  // getNumLowBitsAvailable
30 };
31 
32 // Provide PointerLikeTypeTraits for non-cvr pointers.
33 template<typename T>
35 public:
36  static inline void *getAsVoidPointer(T* P) { return P; }
37  static inline T *getFromVoidPointer(void *P) {
38  return static_cast<T*>(P);
39  }
40 
47  enum { NumLowBitsAvailable = 2 };
48 };
49 
50 // Provide PointerLikeTypeTraits for const pointers.
51 template<typename T>
52 class PointerLikeTypeTraits<const T*> {
54 
55 public:
56  static inline const void *getAsVoidPointer(const T* P) {
57  return NonConst::getAsVoidPointer(const_cast<T*>(P));
58  }
59  static inline const T *getFromVoidPointer(const void *P) {
60  return NonConst::getFromVoidPointer(const_cast<void*>(P));
61  }
62  enum { NumLowBitsAvailable = NonConst::NumLowBitsAvailable };
63 };
64 
65 // Provide PointerLikeTypeTraits for uintptr_t.
66 template<>
67 class PointerLikeTypeTraits<uintptr_t> {
68 public:
69  static inline void *getAsVoidPointer(uintptr_t P) {
70  return reinterpret_cast<void*>(P);
71  }
72  static inline uintptr_t getFromVoidPointer(void *P) {
73  return reinterpret_cast<uintptr_t>(P);
74  }
75  // No bits are available!
76  enum { NumLowBitsAvailable = 0 };
77 };
78 
79 } // end namespace llvm
80 
81 #endif
PointerLikeTypeTraits - This is a traits object that is used to handle pointer types and things that ...
Definition: PointerLikeTypeTraits.h:26
Definition: PointerLikeTypeTraits.h:34