29 #include <boost/range/iterator_range.hpp> 56 template<
typename K,
typename V>
70 using value_type = std::pair<K, boost::iterator_range<value_iterator<V>>>;
94 bool is_end() const noexcept {
return key.empty(); }
100 (
key.empty() && rhs.key.empty()) ||
101 key.data() == rhs.key.data();
154 template<
typename T = V,
typename F = T, std::
size_t offset = 0>
157 static_assert(std::is_same<T, V>(),
"bad ELECTRONEUM_FIELD usage?");
172 template<
typename T = V,
typename F = T, std::
size_t offset = 0>
187 template<
typename K,
typename V,
typename D>
190 std::unique_ptr<MDB_cursor, D> cur;
250 template<
typename K,
typename V>
254 return lhs.equal(rhs);
257 template<
typename K,
typename V>
261 return !lhs.equal(rhs);
bool operator!=(key_iterator< K, V > const &lhs, key_iterator< K, V > const &rhs) noexcept
Lightning memory-mapped database library.
bool is_end() const noexcept
key_iterator(MDB_cursor *cur)
std::pair< epee::span< const std::uint8_t >, epee::span< const std::uint8_t > > get(MDB_cursor &cur, MDB_cursor_op op, std::size_t key, std::size_t value)
std::unique_ptr< MDB_cursor, D > give_cursor() noexcept
boost::iterator_range< key_iterator< K, V > > make_range() const
key_iterator & operator++()
bool equal(key_iterator const &rhs) const noexcept
key_stream & operator=(key_stream &&)=default
std::input_iterator_tag iterator_category
value_iterator< T, F, offset > make_value_iterator() const
key_iterator() noexcept
Construct an "end" iterator.
key_iterator operator++(int)
std::pair< K, boost::iterator_range< value_iterator< V > >> value_type
struct MDB_cursor MDB_cursor
Opaque structure for navigating through a database.
const T & move(const T &t)
key_iterator< K, V > make_iterator() const
void * memcpy(void *a, const void *b, size_t c)
value_type operator*() const
K get_key() const noexcept
bool operator==(key_iterator< K, V > const &lhs, key_iterator< K, V > const &rhs) noexcept
key_stream(std::unique_ptr< MDB_cursor, D > cur)
Take ownership of cur without changing position. nullptr valid.
std::size_t difference_type
boost::iterator_range< value_iterator< T, F, offset > > make_value_range() const