stdgpu::unordered_set< Key, Hash, KeyEqual, Allocator >

Detailed Description

template<typename Key, typename Hash = hash<Key>, typename KeyEqual = equal_to<Key>, typename Allocator = safe_device_allocator<Key>>
class stdgpu::unordered_set< Key, Hash, KeyEqual, Allocator >

A generic container similar to std::unordered_set on the GPU.

Template Parameters

Key	The key type
Hash	The type of the hash functor
KeyEqual	The type of the key equality functor
Allocator	The allocator type

Differences to std::unordered_set:

• index_type instead of size_type
• Manual allocation and destruction of container required
• max_size and capacity limited to initially allocated size
• No guaranteed valid state when reaching capacity limit
• Additional non-standard capacity functions full() and valid()
• Some member functions missing
• Iterators may point at non-occupied and non-valid hash entry
• Difference between begin() and end() returns max_size() rather than size()
• Insert function returns iterator to end() rather than to the element preventing insertion
• Range insert and erase functions use iterators to value_type and key_type

Public Types
using	allocator_type = Allocator
using	const_iterator = const_pointer
using	const_pointer = const value_type *
using	const_reference = const value_type &
using	difference_type = std::ptrdiff_t
using	hasher = Hash
using	index_type = index_t
using	iterator = const_pointer
using	key_equal = KeyEqual
using	key_type = Key
using	pointer = value_type *
using	reference = value_type &
using	value_type = Key

Public Member Functions
	unordered_set () noexcept=default
STDGPU_DEVICE_ONLY const_iterator	begin () const noexcept
STDGPU_DEVICE_ONLY iterator	begin () noexcept
STDGPU_HOST_DEVICE index_type	bucket (const key_type &key) const
STDGPU_HOST_DEVICE index_t	bucket_count () const
STDGPU_DEVICE_ONLY index_type	bucket_size (index_type n) const
STDGPU_DEVICE_ONLY const_iterator	cbegin () const noexcept
STDGPU_DEVICE_ONLY const_iterator	cend () const noexcept
void	clear ()
template<typename ExecutionPolicy , STDGPU_DETAIL_OVERLOAD_IF(is_execution_policy_v< remove_cvref_t< ExecutionPolicy > >) >
void	clear (ExecutionPolicy &&policy)
STDGPU_DEVICE_ONLY bool	contains (const key_type &key) const
template<typename KeyLike , STDGPU_DETAIL_OVERLOAD_IF(detail::is_transparent_v< Hash > &&detail::is_transparent_v< KeyEqual >) >
STDGPU_DEVICE_ONLY bool	contains (const KeyLike &key) const
STDGPU_DEVICE_ONLY index_type	count (const key_type &key) const
template<typename KeyLike , STDGPU_DETAIL_OVERLOAD_IF(detail::is_transparent_v< Hash > &&detail::is_transparent_v< KeyEqual >) >
STDGPU_DEVICE_ONLY index_type	count (const KeyLike &key) const
device_indexed_range< value_type >	device_range ()
device_indexed_range< const value_type >	device_range () const
template<typename ExecutionPolicy , STDGPU_DETAIL_OVERLOAD_IF(is_execution_policy_v< remove_cvref_t< ExecutionPolicy > >) >
device_indexed_range< value_type >	device_range (ExecutionPolicy &&policy)
template<typename ExecutionPolicy , STDGPU_DETAIL_OVERLOAD_IF(is_execution_policy_v< remove_cvref_t< ExecutionPolicy > >) >
device_indexed_range< const value_type >	device_range (ExecutionPolicy &&policy) const
template<class... Args>
STDGPU_DEVICE_ONLY pair< iterator, bool >	emplace (Args &&... args)
STDGPU_HOST_DEVICE bool	empty () const
STDGPU_DEVICE_ONLY const_iterator	end () const noexcept
STDGPU_DEVICE_ONLY iterator	end () noexcept
STDGPU_DEVICE_ONLY index_type	erase (const key_type &key)
template<typename ExecutionPolicy , typename KeyIterator , STDGPU_DETAIL_OVERLOAD_IF( is_execution_policy_v< remove_cvref_t< ExecutionPolicy > > &&detail::is_iterator_v< KeyIterator >) >
void	erase (ExecutionPolicy &&policy, KeyIterator begin, KeyIterator end)
template<typename KeyIterator , STDGPU_DETAIL_OVERLOAD_IF(detail::is_iterator_v< KeyIterator >) >
void	erase (KeyIterator begin, KeyIterator end)
STDGPU_DEVICE_ONLY iterator	find (const key_type &key)
STDGPU_DEVICE_ONLY const_iterator	find (const key_type &key) const
template<typename KeyLike , STDGPU_DETAIL_OVERLOAD_IF(detail::is_transparent_v< Hash > &&detail::is_transparent_v< KeyEqual >) >
STDGPU_DEVICE_ONLY iterator	find (const KeyLike &key)
template<typename KeyLike , STDGPU_DETAIL_OVERLOAD_IF(detail::is_transparent_v< Hash > &&detail::is_transparent_v< KeyEqual >) >
STDGPU_DEVICE_ONLY const_iterator	find (const KeyLike &key) const
STDGPU_HOST_DEVICE bool	full () const
STDGPU_HOST_DEVICE allocator_type	get_allocator () const noexcept
STDGPU_HOST_DEVICE hasher	hash_function () const
STDGPU_DEVICE_ONLY pair< iterator, bool >	insert (const value_type &value)
template<typename ExecutionPolicy , typename ValueIterator , STDGPU_DETAIL_OVERLOAD_IF( is_execution_policy_v< remove_cvref_t< ExecutionPolicy > > &&detail::is_iterator_v< ValueIterator >) >
void	insert (ExecutionPolicy &&policy, ValueIterator begin, ValueIterator end)
template<typename ValueIterator , STDGPU_DETAIL_OVERLOAD_IF(detail::is_iterator_v< ValueIterator >) >
void	insert (ValueIterator begin, ValueIterator end)
STDGPU_HOST_DEVICE key_equal	key_eq () const
STDGPU_HOST_DEVICE float	load_factor () const
STDGPU_HOST_DEVICE float	max_load_factor () const
STDGPU_HOST_DEVICE index_t	max_size () const noexcept
STDGPU_HOST_DEVICE index_t	size () const
bool	valid () const
template<typename ExecutionPolicy , STDGPU_DETAIL_OVERLOAD_IF(is_execution_policy_v< remove_cvref_t< ExecutionPolicy > >) >
bool	valid (ExecutionPolicy &&policy) const

Static Public Member Functions
static unordered_set	createDeviceObject (const index_t &capacity, const Allocator &allocator=Allocator())
template<typename ExecutionPolicy , STDGPU_DETAIL_OVERLOAD_IF(is_execution_policy_v< remove_cvref_t< ExecutionPolicy > >) >
static unordered_set	createDeviceObject (ExecutionPolicy &&policy, const index_t &capacity, const Allocator &allocator=Allocator())
template<typename ExecutionPolicy , STDGPU_DETAIL_OVERLOAD_IF(is_execution_policy_v< remove_cvref_t< ExecutionPolicy > >) >
static void	destroyDeviceObject (ExecutionPolicy &&policy, unordered_set &device_object)
static void	destroyDeviceObject (unordered_set &device_object)