26 Containers library [containers]

26.4 Associative containers [associative]

26.4.1 In general [associative.general]

1
#

The header <map> defines the class templates map and multimap; the header <set> defines the class templates set and multiset.

2
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The following exposition-only alias templates may appear in deduction guides for associative containers:

template<class InputIterator>
  using iter_key_t = remove_const_t<
    typename iterator_traits<InputIterator>::value_type::first_type>; // exposition only
template<class InputIterator>
  using iter_val_t
    = typename iterator_traits<InputIterator>::value_type::second_type; // exposition only
template<class InputIterator>
  using iter_to_alloc_t
    = pair<add_const_t<typename iterator_traits<InputIterator>::value_type::first_type>,
           typename iterator_traits<InputIterator>::value_type::second_type>; // exposition only