libstdc++
types_traits.hpp
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1 // -*- C++ -*-
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3 // Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc.
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25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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35 
36 /**
37  * @file types_traits.hpp
38  * Contains a traits class of types used by containers.
39  */
40 
41 #ifndef PB_DS_TYPES_TRAITS_HPP
42 #define PB_DS_TYPES_TRAITS_HPP
43 
46 #include <utility>
47 
48 namespace __gnu_pbds
49 {
50  namespace detail
51  {
52  template<typename Key, typename Mapped, typename Alloc, bool Store_Extra>
53  struct vt_base_selector
54  {
55  typedef value_type_base<Key, Mapped, Alloc, Store_Extra> type;
56  };
57 
58  template<typename Key, typename Mapped, typename Alloc, bool Store_Extra>
59  struct types_traits
60  : public vt_base_selector<Key, Mapped, Alloc, Store_Extra>::type
61  {
62  typedef typename Alloc::template rebind<Key>::other key_allocator;
63  typedef typename key_allocator::value_type key_type;
64  typedef typename key_allocator::pointer key_pointer;
65  typedef typename key_allocator::const_pointer const_key_pointer;
66  typedef typename key_allocator::reference key_reference;
67  typedef typename key_allocator::const_reference const_key_reference;
68  typedef typename Alloc::size_type size_type;
69 
70  // Extra value (used when the extra value is stored with each value).
71  typedef std::pair<size_type, size_type> comp_hash;
72 
73  typedef integral_constant<int, Store_Extra> store_extra;
74  store_extra m_store_extra_indicator;
75 
76  typedef typename no_throw_copies<Key, Mapped>::indicator no_throw_copies;
77  no_throw_copies m_no_throw_copies_indicator;
78  };
79  } // namespace detail
80 } // namespace __gnu_pbds
81 
82 #endif
Struct holding two objects of arbitrary type.
Definition: stl_pair.h:87