robin-map
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#include <robin_set.h>
Public Types | |
using | key_type = typename ht::key_type |
using | value_type = typename ht::value_type |
using | size_type = typename ht::size_type |
using | difference_type = typename ht::difference_type |
using | hasher = typename ht::hasher |
using | key_equal = typename ht::key_equal |
using | allocator_type = typename ht::allocator_type |
using | reference = typename ht::reference |
using | const_reference = typename ht::const_reference |
using | pointer = typename ht::pointer |
using | const_pointer = typename ht::const_pointer |
using | iterator = typename ht::iterator |
using | const_iterator = typename ht::const_iterator |
Public Member Functions | |
robin_set () | |
robin_set (size_type bucket_count, const Hash &hash=Hash(), const KeyEqual &equal=KeyEqual(), const Allocator &alloc=Allocator()) | |
robin_set (size_type bucket_count, const Allocator &alloc) | |
robin_set (size_type bucket_count, const Hash &hash, const Allocator &alloc) | |
robin_set (const Allocator &alloc) | |
template<class InputIt > | |
robin_set (InputIt first, InputIt last, size_type bucket_count=ht::DEFAULT_INIT_BUCKETS_SIZE, const Hash &hash=Hash(), const KeyEqual &equal=KeyEqual(), const Allocator &alloc=Allocator()) | |
template<class InputIt > | |
robin_set (InputIt first, InputIt last, size_type bucket_count, const Allocator &alloc) | |
template<class InputIt > | |
robin_set (InputIt first, InputIt last, size_type bucket_count, const Hash &hash, const Allocator &alloc) | |
robin_set (std::initializer_list< value_type > init, size_type bucket_count=ht::DEFAULT_INIT_BUCKETS_SIZE, const Hash &hash=Hash(), const KeyEqual &equal=KeyEqual(), const Allocator &alloc=Allocator()) | |
robin_set (std::initializer_list< value_type > init, size_type bucket_count, const Allocator &alloc) | |
robin_set (std::initializer_list< value_type > init, size_type bucket_count, const Hash &hash, const Allocator &alloc) | |
robin_set & | operator= (std::initializer_list< value_type > ilist) |
allocator_type | get_allocator () const |
iterator | begin () noexcept |
const_iterator | begin () const noexcept |
const_iterator | cbegin () const noexcept |
iterator | end () noexcept |
const_iterator | end () const noexcept |
const_iterator | cend () const noexcept |
bool | empty () const noexcept |
size_type | size () const noexcept |
size_type | max_size () const noexcept |
void | clear () noexcept |
std::pair< iterator, bool > | insert (const value_type &value) |
std::pair< iterator, bool > | insert (value_type &&value) |
iterator | insert (const_iterator hint, const value_type &value) |
iterator | insert (const_iterator hint, value_type &&value) |
template<class InputIt > | |
void | insert (InputIt first, InputIt last) |
void | insert (std::initializer_list< value_type > ilist) |
template<class... Args> | |
std::pair< iterator, bool > | emplace (Args &&... args) |
template<class... Args> | |
iterator | emplace_hint (const_iterator hint, Args &&... args) |
iterator | erase (iterator pos) |
iterator | erase (const_iterator pos) |
iterator | erase (const_iterator first, const_iterator last) |
size_type | erase (const key_type &key) |
size_type | erase (const key_type &key, std::size_t precalculated_hash) |
template<class K , class KE = KeyEqual, typename std::enable_if< has_is_transparent< KE >::value >::type * = nullptr> | |
size_type | erase (const K &key) |
template<class K , class KE = KeyEqual, typename std::enable_if< has_is_transparent< KE >::value >::type * = nullptr> | |
size_type | erase (const K &key, std::size_t precalculated_hash) |
void | swap (robin_set &other) |
size_type | count (const Key &key) const |
size_type | count (const Key &key, std::size_t precalculated_hash) const |
template<class K , class KE = KeyEqual, typename std::enable_if< has_is_transparent< KE >::value >::type * = nullptr> | |
size_type | count (const K &key) const |
template<class K , class KE = KeyEqual, typename std::enable_if< has_is_transparent< KE >::value >::type * = nullptr> | |
size_type | count (const K &key, std::size_t precalculated_hash) const |
iterator | find (const Key &key) |
iterator | find (const Key &key, std::size_t precalculated_hash) |
const_iterator | find (const Key &key) const |
const_iterator | find (const Key &key, std::size_t precalculated_hash) const |
template<class K , class KE = KeyEqual, typename std::enable_if< has_is_transparent< KE >::value >::type * = nullptr> | |
iterator | find (const K &key) |
template<class K , class KE = KeyEqual, typename std::enable_if< has_is_transparent< KE >::value >::type * = nullptr> | |
iterator | find (const K &key, std::size_t precalculated_hash) |
template<class K , class KE = KeyEqual, typename std::enable_if< has_is_transparent< KE >::value >::type * = nullptr> | |
const_iterator | find (const K &key) const |
template<class K , class KE = KeyEqual, typename std::enable_if< has_is_transparent< KE >::value >::type * = nullptr> | |
const_iterator | find (const K &key, std::size_t precalculated_hash) const |
std::pair< iterator, iterator > | equal_range (const Key &key) |
std::pair< iterator, iterator > | equal_range (const Key &key, std::size_t precalculated_hash) |
std::pair< const_iterator, const_iterator > | equal_range (const Key &key) const |
std::pair< const_iterator, const_iterator > | equal_range (const Key &key, std::size_t precalculated_hash) const |
template<class K , class KE = KeyEqual, typename std::enable_if< has_is_transparent< KE >::value >::type * = nullptr> | |
std::pair< iterator, iterator > | equal_range (const K &key) |
template<class K , class KE = KeyEqual, typename std::enable_if< has_is_transparent< KE >::value >::type * = nullptr> | |
std::pair< iterator, iterator > | equal_range (const K &key, std::size_t precalculated_hash) |
template<class K , class KE = KeyEqual, typename std::enable_if< has_is_transparent< KE >::value >::type * = nullptr> | |
std::pair< const_iterator, const_iterator > | equal_range (const K &key) const |
template<class K , class KE = KeyEqual, typename std::enable_if< has_is_transparent< KE >::value >::type * = nullptr> | |
std::pair< const_iterator, const_iterator > | equal_range (const K &key, std::size_t precalculated_hash) const |
size_type | bucket_count () const |
size_type | max_bucket_count () const |
float | load_factor () const |
float | min_load_factor () const |
float | max_load_factor () const |
void | min_load_factor (float ml) |
void | max_load_factor (float ml) |
void | rehash (size_type count) |
void | reserve (size_type count) |
hasher | hash_function () const |
key_equal | key_eq () const |
iterator | mutable_iterator (const_iterator pos) |
Friends | |
bool | operator== (const robin_set &lhs, const robin_set &rhs) |
bool | operator!= (const robin_set &lhs, const robin_set &rhs) |
void | swap (robin_set &lhs, robin_set &rhs) |
Implementation of a hash set using open-adressing and the robin hood hashing algorithm with backward shift deletion.
For operations modifying the hash set (insert, erase, rehash, ...), the strong exception guarantee is only guaranteed when the expression std::is_nothrow_swappable<Key>::value && std::is_nothrow_move_constructible<Key>::value
is true, otherwise if an exception is thrown during the swap or the move, the hash set may end up in a undefined state. Per the standard a Key
with a noexcept copy constructor and no move constructor also satisfies the std::is_nothrow_move_constructible<Key>::value
criterion (and will thus guarantee the strong exception for the set).
When StoreHash
is true, 32 bits of the hash are stored alongside the values. It can improve the performance during lookups if the KeyEqual
function takes time (or engenders a cache-miss for example) as we then compare the stored hashes before comparing the keys. When tsl::rh::power_of_two_growth_policy
is used as GrowthPolicy
, it may also speed-up the rehash process as we can avoid to recalculate the hash. When it is detected that storing the hash will not incur any memory penality due to alignement (i.e. sizeof(tsl::detail_robin_hash::bucket_entry<ValueType, true>) == sizeof(tsl::detail_robin_hash::bucket_entry<ValueType, false>)
) and tsl::rh::power_of_two_growth_policy
is used, the hash will be stored even if StoreHash
is false so that we can speed-up the rehash (but it will not be used on lookups unless StoreHash
is true).
GrowthPolicy
defines how the set grows and consequently how a hash value is mapped to a bucket. By default the set uses tsl::rh::power_of_two_growth_policy
. This policy keeps the number of buckets to a power of two and uses a mask to set the hash to a bucket instead of the slow modulo. Other growth policies are available and you may define your own growth policy, check tsl::rh::power_of_two_growth_policy
for the interface.
Key
must be swappable.
Key
must be copy and/or move constructible.
If the destructor of Key
throws an exception, the behaviour of the class is undefined.
Iterators invalidation:
using tsl::robin_set< Key, Hash, KeyEqual, Allocator, StoreHash, GrowthPolicy >::allocator_type = typename ht::allocator_type |
using tsl::robin_set< Key, Hash, KeyEqual, Allocator, StoreHash, GrowthPolicy >::const_iterator = typename ht::const_iterator |
using tsl::robin_set< Key, Hash, KeyEqual, Allocator, StoreHash, GrowthPolicy >::const_pointer = typename ht::const_pointer |
using tsl::robin_set< Key, Hash, KeyEqual, Allocator, StoreHash, GrowthPolicy >::const_reference = typename ht::const_reference |
using tsl::robin_set< Key, Hash, KeyEqual, Allocator, StoreHash, GrowthPolicy >::difference_type = typename ht::difference_type |
using tsl::robin_set< Key, Hash, KeyEqual, Allocator, StoreHash, GrowthPolicy >::hasher = typename ht::hasher |
using tsl::robin_set< Key, Hash, KeyEqual, Allocator, StoreHash, GrowthPolicy >::iterator = typename ht::iterator |
using tsl::robin_set< Key, Hash, KeyEqual, Allocator, StoreHash, GrowthPolicy >::key_equal = typename ht::key_equal |
using tsl::robin_set< Key, Hash, KeyEqual, Allocator, StoreHash, GrowthPolicy >::key_type = typename ht::key_type |
using tsl::robin_set< Key, Hash, KeyEqual, Allocator, StoreHash, GrowthPolicy >::pointer = typename ht::pointer |
using tsl::robin_set< Key, Hash, KeyEqual, Allocator, StoreHash, GrowthPolicy >::reference = typename ht::reference |
using tsl::robin_set< Key, Hash, KeyEqual, Allocator, StoreHash, GrowthPolicy >::size_type = typename ht::size_type |
using tsl::robin_set< Key, Hash, KeyEqual, Allocator, StoreHash, GrowthPolicy >::value_type = typename ht::value_type |
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Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same as hash_function()(key). Usefull to speed-up the lookup if you already have the hash.
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This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists. If so, K must be hashable and comparable to Key.
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This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists. If so, K must be hashable and comparable to Key.
Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same as hash_function()(key). Usefull to speed-up the lookup if you already have the hash.
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Due to the way elements are stored, emplace will need to move or copy the key-value once. The method is equivalent to insert(value_type(std::forward<Args>(args)...));
Mainly here for compatibility with the std::unordered_map interface.
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Due to the way elements are stored, emplace_hint will need to move or copy the key-value once. The method is equivalent to insert(hint, value_type(std::forward<Args>(args)...));
Mainly here for compatibility with the std::unordered_map interface.
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Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same as hash_function()(key). Usefull to speed-up the lookup if you already have the hash.
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Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same as hash_function()(key). Usefull to speed-up the lookup if you already have the hash.
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This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists. If so, K must be hashable and comparable to Key.
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This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists. If so, K must be hashable and comparable to Key.
Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same as hash_function()(key). Usefull to speed-up the lookup if you already have the hash.
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This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists. If so, K must be hashable and comparable to Key.
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This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists. If so, K must be hashable and comparable to Key.
Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same as hash_function()(key). Usefull to speed-up the lookup if you already have the hash.
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Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same as hash_function()(key). Usefull to speed-up the lookup to the value if you already have the hash.
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This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists. If so, K must be hashable and comparable to Key.
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This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists. If so, K must be hashable and comparable to Key.
Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same as hash_function()(key). Usefull to speed-up the lookup to the value if you already have the hash.
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Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same as hash_function()(key). Usefull to speed-up the lookup if you already have the hash.
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Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same as hash_function()(key). Usefull to speed-up the lookup if you already have the hash.
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This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists. If so, K must be hashable and comparable to Key.
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This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists. If so, K must be hashable and comparable to Key.
Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same as hash_function()(key). Usefull to speed-up the lookup if you already have the hash.
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This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists. If so, K must be hashable and comparable to Key.
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This overload only participates in the overload resolution if the typedef KeyEqual::is_transparent exists. If so, K must be hashable and comparable to Key.
Use the hash value 'precalculated_hash' instead of hashing the key. The hash value should be the same as hash_function()(key). Usefull to speed-up the lookup if you already have the hash.
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Set the min_load_factor
to ml
. When the load_factor
of the set goes below min_load_factor
after some erase operations, the set will be shrunk when an insertion occurs. The erase method itself never shrinks the set.
The default value of min_load_factor
is 0.0f, the set never shrinks by default.
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Convert a const_iterator to an iterator.
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