dune-functions  2.9.0
multiindex.hh
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1 // -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 // vi: set et ts=4 sw=2 sts=2:
3 #ifndef DUNE_FUNCTIONS_COMMON_MULTIINDEX_HH
4 #define DUNE_FUNCTIONS_COMMON_MULTIINDEX_HH
5 
6 #include <cstddef>
7 #include <array>
8 #include <iostream>
9 
10 #include <dune/common/hash.hh>
11 
12 
13 namespace Dune::Functions {
14 
15 
16 
22 template<class size_type, std::size_t n>
24  public std::array<size_type, n>
25 {
26 public:
27  static constexpr std::size_t size() { return n; }
28 
29  inline friend std::size_t hash_value(const StaticMultiIndex& v) noexcept {
30  return hash_range(v.begin(), v.end());
31  }
32 
33 };
34 
35 
36 
46 template<class size_type>
47 class StaticMultiIndex<size_type,1> :
48  public std::array<size_type, 1>
49 {
50 public:
51 
52  static constexpr std::size_t size() { return 1; }
53 
54  operator const size_type& () const {
55  return (*this)[0];
56  }
57 
58  inline friend std::size_t hash_value(const StaticMultiIndex& v) noexcept {
59  return hash_range(v.begin(), v.end());
60  }
61 
62  operator size_type& () {
63  return (*this)[0];
64  }
65 
66 };
67 
68 
69 
70 template<typename Stream, class size_type, std::size_t n>
71 inline Stream& operator<<(Stream& stream, const StaticMultiIndex<size_type,n>& c) {
72  for (const auto& ci : c)
73  stream << ci << " ";
74  return stream;
75 }
76 
77 
78 
79 } // namespace Dune::Functions
80 
81 template<class size_type, std::size_t n>
82 struct std::tuple_size< Dune::Functions::StaticMultiIndex<size_type,n> >
83  : std::integral_constant<std::size_t, n> { };
84 
85 DUNE_DEFINE_HASH(DUNE_HASH_TEMPLATE_ARGS(typename size_type, std::size_t n),DUNE_HASH_TYPE(Dune::Functions::StaticMultiIndex<size_type,n>))
86 
87 #endif // DUNE_FUNCTIONS_COMMON_MULTIINDEX_HH
Definition: polynomial.hh:10
Definition: polynomial.hh:11
Stream & operator<<(Stream &stream, const StaticMultiIndex< size_type, n > &c)
Definition: multiindex.hh:71
A statically sized MultiIndex type.
Definition: multiindex.hh:25
static constexpr std::size_t size()
Definition: multiindex.hh:27
friend std::size_t hash_value(const StaticMultiIndex &v) noexcept
Definition: multiindex.hh:29
static constexpr std::size_t size()
Definition: multiindex.hh:52
friend std::size_t hash_value(const StaticMultiIndex &v) noexcept
Definition: multiindex.hh:58