Hash.h
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34 
35 /* Author: Mark Moll */
36 
37 #ifndef OMPL_UTIL_HASH_
38 #define OMPL_UTIL_HASH_
39 
40 #include <functional>
41 #include <type_traits>
42 #include <utility>
43 
44 namespace ompl
45 {
46  // copied from <boost/functional/hash.hpp>
47  template <class T>
48  inline void hash_combine(std::size_t &seed, const T &v)
49  {
50  std::hash<T> hasher;
51  seed ^= hasher(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
52  }
53 }
54 
55 namespace std
56 {
57  template <class U, class V>
58  struct hash<std::pair<U, V>>
59  {
60  using argument_type = std::pair<U, V>;
61  using result_type = std::size_t;
62  result_type operator()(argument_type const &p) const
63  {
64  result_type h = std::hash<typename std::remove_cv<U>::type>()(p.first);
65  ompl::hash_combine(h, p.second);
66  return h;
67  }
68  };
69 }
70 
71 #endif
STL namespace.
Main namespace. Contains everything in this library.
Definition: AppBase.h:21