ACE/examples/APG/Containers/Hash_Map_Hash.h

   1 /* -*- C++ -*- */
   2 #ifndef __HASH_MAP_HASH_H_
   3 #define __HASH_MAP_HASH_H_
   4
   5 // Listing 1 code/ch05
   6 // Key type that we are going to use.
   7 class KeyType
   8 {
   9 public:
  10   KeyType () : val_(0) {}
  11
  12   KeyType (int i) : val_(i) {}
  13
  14   KeyType (const KeyType& kt) { this->val_ = kt.val_; }
  15
  16   operator int () const { return val_; }
  17
  18 private:
  19   int val_;
  20 };
  21
  22 ACE_BEGIN_VERSIONED_NAMESPACE_DECL
  23
  24 // Specialize the hash functor.
  25 template<>
  26 class ACE_Hash<KeyType>
  27 {
  28 public:
  29   u_long operator() (const KeyType kt) const
  30   {
  31     int val = kt;
  32     return (u_long)val;
  33   }
  34 };
  35
  36
  37 // Specialize the equality functor.
  38 template<>
  39 class ACE_Equal_To<KeyType>
  40 {
  41 public:
  42   int operator() (const KeyType& kt1,
  43                   const KeyType& kt2) const
  44   {
  45     int val1 = kt1;
  46     int val2 = kt2;
  47     return (val1 == val2);
  48   }
  49 };
  50
  51 ACE_END_VERSIONED_NAMESPACE_DECL
  52
  53 // Listing 1
  54
  55 #endif /* __HASH_MAP_HASH_H_ */