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#ifndef PYTHONIC_INCLUDE_TYPES_DICT_HPP
#define PYTHONIC_INCLUDE_TYPES_DICT_HPP

#include "pythonic/include/types/assignable.hpp"
#include "pythonic/include/types/tuple.hpp"
#include "pythonic/include/types/empty_iterator.hpp"

#include "pythonic/include/utils/shared_ref.hpp"
#include "pythonic/include/utils/iterator.hpp"
#include "pythonic/include/utils/reserve.hpp"

#include "pythonic/include/builtins/None.hpp"

#include <memory>
#include <utility>
#include <limits>
#include <algorithm>
#include <iterator>
#include <unordered_map>

PYTHONIC_NS_BEGIN

namespace types
{

static const size_t DEFAULT_DICT_CAPACITY = 64;

struct empty_dict;

template <class I>
  struct item_iterator_adaptator : public I {
    using value_type = make_tuple_t<
        typename std::remove_cv<typename I::value_type::first_type>::type,
        typename I::value_type::second_type>;
    using pointer = value_type *;
    using reference = value_type &;
    item_iterator_adaptator() = default;
    item_iterator_adaptator(I const &i);
    value_type operator*() const;
  };

template <class I>
  struct key_iterator_adaptator : public I {
    using value_type = typename I::value_type::first_type;
    using pointer = typename I::value_type::first_type *;
    using reference = typename I::value_type::first_type &;
    key_iterator_adaptator();
    key_iterator_adaptator(I const &i);
    value_type operator*() const;
  };

template <class I>
  struct value_iterator_adaptator : public I {
    using value_type = typename I::value_type::second_type;
    using pointer = typename I::value_type::second_type *;
    using reference = typename I::value_type::second_type &;
    value_iterator_adaptator();
    value_iterator_adaptator(I const &i);
    value_type operator*() const;
  };

template <class D>
  struct dict_items {
    using iterator = typename D::item_const_iterator;
    using value_type = typename iterator::value_type;
    D data;
    dict_items();
    dict_items(D const &d);
    iterator begin() const;
    iterator end() const;
    long size() const;
  };

template <class D>
  struct dict_keys {
    using iterator = typename D::key_const_iterator;
    using value_type = typename iterator::value_type;
    D data;
    dict_keys();
    dict_keys(D const &d);
    iterator begin() const;
    iterator end() const;
    long size() const;
  };

template <class D>
  struct dict_values {
    using iterator = typename D::value_const_iterator;
    using value_type = typename iterator::value_type;
    D data;
    dict_values();
    dict_values(D const &d);
    iterator begin() const;
    iterator end() const;
    long size() const;
  };

template <class K, class V>
  class dict
  {

// data holder
    using _key_type =
        typename std::remove_cv<typename std::remove_reference<K>::type>::type;
    using _value_type =
        typename std::remove_cv<typename std::remove_reference<V>::type>::type;
    using container_type = std::unordered_map<_key_type, _value_type>;

utils::shared_ref<container_type> data;
    template <class Kp, class Vp>
    friend class dict;

public:
    // types
    using reference = typename container_type::reference;
    using const_reference = typename container_type::const_reference;
    using iterator = utils::comparable_iterator<
        key_iterator_adaptator<typename container_type::iterator>>;
    using const_iterator = utils::comparable_iterator<
        key_iterator_adaptator<typename container_type::const_iterator>>;
    using item_iterator = utils::comparable_iterator<
        item_iterator_adaptator<typename container_type::iterator>>;
    using item_const_iterator = utils::comparable_iterator<
        item_iterator_adaptator<typename container_type::const_iterator>>;
    using key_iterator = utils::comparable_iterator<
        key_iterator_adaptator<typename container_type::iterator>>;
    using key_const_iterator = utils::comparable_iterator<
        key_iterator_adaptator<typename container_type::const_iterator>>;
    using value_iterator = utils::comparable_iterator<
        value_iterator_adaptator<typename container_type::iterator>>;
    using value_const_iterator = utils::comparable_iterator<
        value_iterator_adaptator<typename container_type::const_iterator>>;
    using size_type = typename container_type::size_type;
    using difference_type = typename container_type::difference_type;
    using value_type = typename container_type::value_type;
    using allocator_type = typename container_type::allocator_type;
    using pointer = typename container_type::pointer;
    using const_pointer = typename container_type::const_pointer;

// constructors
    dict();
    dict(empty_dict const &);
    dict(std::initializer_list<value_type> l);
    dict(dict<K, V> const &other);
    template <class Kp, class Vp>
    dict(dict<Kp, Vp> const &other);
    template <class B, class E>
    dict(B begin, E end);

// iterators
    iterator begin();
    const_iterator begin() const;
    iterator end();
    const_iterator end() const;
    item_iterator item_begin();
    item_const_iterator item_begin() const;
    item_iterator item_end();
    item_const_iterator item_end() const;
    key_iterator key_begin();
    key_const_iterator key_begin() const;
    key_iterator key_end();
    key_const_iterator key_end() const;
    value_iterator value_begin();
    value_const_iterator value_begin() const;
    value_iterator value_end();
    value_const_iterator value_end() const;

// dict interface
    operator bool();
    V &operator[](K const &key);
    template <class OtherKey>
    V &operator[](OtherKey const &key)
    {
      return (*this)[K(key)];
    }
    V const &operator[](K const &key) const;
    template <class OtherKey>
    V const &operator[](OtherKey const &key) const
    {
      return (*this)[K(key)];
    }

V &fast(K const &key);
    V const &fast(K const &key) const;

item_const_iterator find(K const &key) const;

void clear();

dict<K, V> copy() const;

template <class W>
    typename __combined<V, W>::type get(K const &key, W d) const;

none<V> get(K const &key) const;

template <class W>
    V &setdefault(K const &key, W d);

none<V> &setdefault(K const &key);

template <class K0, class W0>
    void update(dict<K0, W0> const &d);

template <class Iterable>
    void update(Iterable const &d);

template <class W>
    typename __combined<V, W>::type pop(K const &key, W d);

V pop(K const &key);

make_tuple_t<K, V> popitem();

long size() const;

dict_items<dict<K, V>> items() const;
    dict_keys<dict<K, V>> keys() const;
    dict_values<dict<K, V>> values() const;

// type inference stuff
    template <class K_, class V_>
    dict<typename __combined<K, K_>::type, typename __combined<V, V_>::type>
    operator+(dict<K_, V_> const &);

// id interface
    intptr_t id() const;

template <class T>
    bool contains(T const &key) const;
  };

struct empty_dict {

using value_type = void;
    using iterator = empty_iterator;
    using const_iterator = empty_iterator;

template <class K, class V>
    dict<K, V> operator+(dict<K, V> const &s);

empty_dict operator+(empty_dict const &);
    operator bool() const;
    iterator begin() const;
    iterator end() const;
    template <class V>
    bool contains(V const &) const;
  };

template <class K, class V>
  dict<K, V> operator+(dict<K, V> const &d, empty_dict);
}

template <class K, class V>
struct assignable<types::dict<K, V>> {
  using type =
      types::dict<typename assignable<K>::type, typename assignable<V>::type>;
};

std::ostream &operator<<(std::ostream &os, types::empty_dict const &);

template <class K, class V>
std::ostream &operator<<(std::ostream &os, std::pair<K, V> const &p);

template <class K, class V>
std::ostream &operator<<(std::ostream &os, types::dict<K, V> const &v);
PYTHONIC_NS_END

/* overload std::get */
namespace std
{
  template <size_t I, class K, class V>
  auto get(pythonic::types::dict<K, V> &d) -> decltype(d[I]);

template <size_t I, class K, class V>
  auto get(pythonic::types::dict<K, V> const &d) -> decltype(d[I]);

template <size_t I, class K, class V>
  struct tuple_element<I, pythonic::types::dict<K, V>> {
    using type = V;
  };
}

/* type inference stuff  {*/
#include "pythonic/include/types/combined.hpp"
#include "pythonic/include/types/list.hpp"

template <class A>
struct __combined<container<A>, pythonic::types::empty_dict> {
  using type = dict_container<A>;
};

template <class A>
struct __combined<pythonic::types::empty_dict, container<A>> {
  using type = dict_container<A>;
};

template <class A, class B, class C>
struct __combined<container<A>, pythonic::types::dict<C, B>> {
  using type = pythonic::types::dict<C, typename __combined<A, B>::type>;
};

template <class A, class B, class C>
struct __combined<pythonic::types::dict<C, B>, container<A>> {
  using type = pythonic::types::dict<C, typename __combined<A, B>::type>;
};

template <class T>
struct __combined<pythonic::types::empty_dict, pythonic::types::list<T>> {
  using type = pythonic::types::dict<typename std::tuple_element<0, T>::type,
                                     typename std::tuple_element<1, T>::type>;
};

template <class T, size_t N>
struct __combined<pythonic::types::empty_dict,
                  pythonic::types::static_list<T, N>> {
  using type = pythonic::types::dict<typename std::tuple_element<0, T>::type,
                                     typename std::tuple_element<1, T>::type>;
};

template <class T>
struct __combined<pythonic::types::list<T>, pythonic::types::empty_dict> {
  using type = pythonic::types::dict<typename std::tuple_element<0, T>::type,
                                     typename std::tuple_element<1, T>::type>;
};
template <class T, size_t N>
struct __combined<pythonic::types::static_list<T, N>,
                  pythonic::types::empty_dict> {
  using type = pythonic::types::dict<typename std::tuple_element<0, T>::type,
                                     typename std::tuple_element<1, T>::type>;
};

template <class K0, class V0, class T>
struct __combined<pythonic::types::dict<K0, V0>, pythonic::types::list<T>> {
  using type = pythonic::types::dict<
      typename __combined<K0, typename std::tuple_element<0, T>::type>::type,
      typename __combined<V0, typename std::tuple_element<1, T>::type>::type>;
};

template <class K0, class V0, class T, size_t N>
struct __combined<pythonic::types::dict<K0, V0>,
                  pythonic::types::static_list<T, N>> {
  using type = pythonic::types::dict<
      typename __combined<K0, typename std::tuple_element<0, T>::type>::type,
      typename __combined<V0, typename std::tuple_element<1, T>::type>::type>;
};

template <class K0, class V0, class T>
struct __combined<pythonic::types::list<T>, pythonic::types::dict<K0, V0>> {
  using type = pythonic::types::dict<
      typename __combined<K0, typename std::tuple_element<0, T>::type>::type,
      typename __combined<V0, typename std::tuple_element<1, T>::type>::type>;
};

template <class K0, class V0, class T, size_t N>
struct __combined<pythonic::types::static_list<T, N>,
                  pythonic::types::dict<K0, V0>> {
  using type = pythonic::types::dict<
      typename __combined<K0, typename std::tuple_element<0, T>::type>::type,
      typename __combined<V0, typename std::tuple_element<1, T>::type>::type>;
};

template <class K>
struct __combined<indexable<K>, pythonic::types::empty_dict> {
  using type = indexable_dict<K>;
};

template <class K>
struct __combined<pythonic::types::empty_dict, indexable_dict<K>> {
  using type = indexable_dict<K>;
};

template <class K>
struct __combined<indexable_dict<K>, pythonic::types::empty_dict> {
  using type = indexable_dict<K>;
};

template <class K0, class K1, class V1>
struct __combined<pythonic::types::dict<K1, V1>, indexable_dict<K0>> {
  using type = pythonic::types::dict<typename __combined<K0, K1>::type, V1>;
};

template <class K0, class K1, class V1>
struct __combined<indexable_dict<K0>, pythonic::types::dict<K1, V1>> {
  using type = pythonic::types::dict<typename __combined<K0, K1>::type, V1>;
};

template <class K>
struct __combined<pythonic::types::empty_dict, indexable<K>> {
  using type = indexable_dict<K>;
};

template <class K0, class V, class K1>
struct __combined<pythonic::types::dict<K0, V>, indexable<K1>> {
  using type = pythonic::types::dict<typename __combined<K0, K1>::type, V>;
};

template <class K0, class V, class K1>
struct __combined<indexable<K1>, pythonic::types::dict<K0, V>> {
  using type = pythonic::types::dict<typename __combined<K0, K1>::type, V>;
};

template <class K, class V>
struct __combined<pythonic::types::empty_dict, indexable_container<K, V>> {
  using type = pythonic::types::dict<K, V>;
};

template <class K0, class V0, class K1, class V1>
struct __combined<pythonic::types::dict<K0, V0>, indexable_container<K1, V1>> {
  using type = pythonic::types::dict<typename __combined<K0, K1>::type,
                                     typename __combined<V0, V1>::type>;
};

template <class K0, class V0, class K1, class V1>
struct __combined<indexable_container<K1, V1>, pythonic::types::dict<K0, V0>> {
  using type = pythonic::types::dict<typename __combined<K0, K1>::type,
                                     typename __combined<V0, V1>::type>;
};

template <class K, class V>
struct __combined<indexable_container<K, V>, pythonic::types::empty_dict> {
  using type = pythonic::types::dict<K, V>;
};

template <class K, class V>
struct __combined<indexable<K>, dict_container<V>> {
  using type = pythonic::types::dict<K, V>;
};

template <class V, class K>
struct __combined<dict_container<V>, indexable<K>> {
  using type = pythonic::types::dict<K, V>;
};

template <class V, class K, class W>
struct __combined<dict_container<V>, indexable_container<K, W>> {
  using type = pythonic::types::dict<K, typename __combined<V, W>::type>;
};

template <class V, class K, class W>
struct __combined<indexable_container<K, W>, dict_container<V>> {
  using type = pythonic::types::dict<K, typename __combined<V, W>::type>;
};

template <class V, class K, class W>
struct __combined<indexable_dict<V>, indexable_container<K, W>> {
  using type = pythonic::types::dict<typename __combined<K, V>::type, W>;
};

template <class V, class K, class W>
struct __combined<indexable_container<K, W>, indexable_dict<V>> {
  using type = pythonic::types::dict<typename __combined<K, V>::type, W>;
};

template <class K, class V, class W>
struct __combined<pythonic::types::dict<K, V>, dict_container<W>> {
  using type = pythonic::types::dict<K, typename __combined<V, W>::type>;
};

template <class V, class K, class W>
struct __combined<dict_container<W>, pythonic::types::dict<K, V>> {
  using type = pythonic::types::dict<K, typename __combined<V, W>::type>;
};

template <class K, class V>
struct __combined<indexable_dict<K>, container<V>> {
  using type = pythonic::types::dict<K, V>;
};

template <class K0, class K1>
struct __combined<indexable_dict<K0>, indexable<K1>> {
  using type = indexable_dict<typename __combined<K0, K1>::type>;
};

template <class K0, class K1>
struct __combined<indexable<K0>, indexable_dict<K1>> {
  using type = indexable_dict<typename __combined<K0, K1>::type>;
};

template <class V, class K>
struct __combined<container<V>, indexable_dict<K>> {
  using type = pythonic::types::dict<K, V>;
};

/* } */
#ifdef ENABLE_PYTHON_MODULE

#include "pythonic/python/core.hpp"

PYTHONIC_NS_BEGIN

template <typename K, typename V>
struct to_python<types::dict<K, V>> {
  static PyObject *convert(types::dict<K, V> const &v);
};

template <>
struct to_python<types::empty_dict> {
  static PyObject *convert(types::empty_dict);
};

template <typename K, typename V>
struct from_python<types::dict<K, V>> {

static bool is_convertible(PyObject *obj);

static types::dict<K, V> convert(PyObject *obj);
};
PYTHONIC_NS_END

#endif

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