Forward declaration of HashSet class. More...

#include <hashset.h>

Inherits System::Collections::Generic::BaseSet< T, std::unordered_set< T, EqualityComparerHashAdapter< T >, EqualityComparerAdapter< T >, System::Details::CollectionHelpers::ContainerPointerMode< T >::allocator_type > >.

Public Types
using	ThisType = System::Collections::Generic::HashSet< T >
	Self type. More...

using	BaseType = BaseSet< T, std::unordered_set< T, EqualityComparerHashAdapter< T >, EqualityComparerAdapter< T >, typename System::Details::CollectionHelpers::ContainerPointerMode< T >::allocator_type > >
	Base type. More...

using	ThisPtr = SharedPtr< ThisType >
	Pointer type. More...

Public Types inherited from System::Object
typedef SmartPtr< Object >	ptr
	Alias for smart pointer type. More...

Public Types inherited from System::Collections::Generic::ICollection< T >
typedef T	ValueType
	Value type name. More...

typedef ICollection< T >	ThisType
	Collection type name. More...

Public Types inherited from System::Collections::Generic::IEnumerable< T >
typedef IEnumerator< T >	IEnumeratorType
	Enumerator type. More...

using	ValueType = T

using	iterator = System::Details::VirtualizedIterator< T >
	Iterator type. More...

using	const_iterator = System::Details::VirtualizedConstIterator< T >
	Const iterator type. More...

using	virtualized_iterator = System::Details::VirtualizedIteratorBase< T >
	Inner iterator base type. More...

using	virtualized_iterator_element = T
	Inner iterator element type. More...

Public Member Functions
	HashSet ()
	RTTI information. More...

	HashSet (int capacity)
	Creates empty set with specified capacity. More...

	HashSet (const SharedPtr< IEqualityComparer< T > > &comparer)
	Creates empty set that uses the specified equality comparer. More...

	HashSet (const SharedPtr< IEnumerable< T > > &items)
	Creates hashset based on enumerable values. More...

Public Member Functions inherited from System::Object
	Object ()
	Creates object. Initializes all internal data structures. More...

virtual	~Object ()
	Destroys object. Frees all internal data structures. More...

	Object (Object const &x)
	Copy constructor. Doesn't copy anything, really, just initializes new object and enables copy constructing subclasses. More...

Object &	operator= (Object const &x)
	Assignment operator. Doesn't copy anything, really, just initializes new object and enables copy constructing subclasses. More...

Object *	SharedRefAdded ()
	Increments shared reference count. Shouldn't be called directly; instead, use smart pointers or ThisProtector. More...

int	SharedRefRemovedSafe ()
	Decrements and returns shared reference count. Shouldn't be called directly; instead, use smart pointers or ThisProtector. More...

int	RemovedSharedRefs (int count)
	Decreases shared reference count by specified value. More...

Detail::SmartPtrCounter *	WeakRefAdded ()
	Increments weak reference count. Shouldn't be called directly; instead, use smart pointers or ThisProtector. More...

void	WeakRefRemoved ()
	Decrements weak reference count. Shouldn't be called directly; instead, use smart pointers or ThisProtector. More...

Detail::SmartPtrCounter *	GetCounter ()
	Gets reference counter data structure associated with the object. More...

int	SharedCount () const
	Gets current value of shared reference counter. More...

void	Lock ()
	Implements C# lock() statement locking. Call directly or use LockContext sentry object. More...

void	Unlock ()
	Implements C# lock() statement unlocking. Call directly or use LockContext sentry object. More...

virtual bool	Equals (ptr obj)
	Compares objects using C# Object.Equals semantics. More...

virtual int32_t	GetHashCode () const
	Analog of C# Object.GetHashCode() method. Enables hashing of custom objects. More...

virtual String	ToString () const
	Analog of C# Object.ToString() method. Enables converting custom objects to string. More...

virtual ptr	MemberwiseClone () const
	Analog of C# Object.MemberwiseClone() method. Enables cloning custom types. More...

virtual const TypeInfo &	GetType () const
	Gets actual type of object. Analog of C# System.Object.GetType() call. More...

virtual bool	Is (const TypeInfo &targetType) const
	Check if object represents an instance of type described by targetType. Analog of C# 'is' operator. More...

virtual void	SetTemplateWeakPtr (uint32_t argument)
	Set n'th template argument a weak pointer (rather than shared). Allows switching pointers in containers to weak mode. More...

virtual bool	FastCast (const Details::FastRttiBase &helper, void **out_ptr) const
	For internal purposes only. More...

template<>
bool	ReferenceEquals (String const &str, std::nullptr_t)
	Specialization of Object::ReferenceEquals for case of string and nullptr. More...

template<>
bool	ReferenceEquals (String const &str1, String const &str2)
	Specialization of Object::ReferenceEquals for case of strings. More...

Public Member Functions inherited from System::Collections::Generic::ICollection< T >
virtual int	get_Count () const =0
	Gets number of elements in collection. More...

virtual void	Add (const T &item)=0
	Adds element into collection. More...

virtual void	Clear ()=0
	Deletes all elements from collection. More...

virtual bool	Contains (const T &item) const =0
	Checks if element is present in collection. More...

virtual bool	Remove (const T &item)=0
	Deletes element from collection. More...

virtual bool	get_IsReadOnly () const
	Checks if collection is read only. More...

virtual void	CopyTo (System::ArrayPtr< T > array, int arrayIndex)=0
	Copies all collection elements to existing array elements. More...

ICollection &	operator= (ICollection &&) noexcept
	Move assignment operator. More...

ICollection &	operator= (const ICollection &)
	Move assignment operator. More...

	ICollection ()
	Default constructor. More...

	ICollection (const ICollection &)
	Copy constructor. More...

	ICollection (ICollection &&) noexcept
	Move constructor. More...

virtual	~ICollection ()
	Destructor. More...

SharedPtr< Object >	get_SyncRoot () const
	Gets the object the collection is being synchronized through. More...

Public Member Functions inherited from System::Collections::Generic::IEnumerable< T >
virtual SharedPtr< IEnumerator< T > >	GetEnumerator ()=0
	Gets enumerator. More...

T	LINQ_Aggregate (const Func< T, T, T > &func)
	Applies an accumulator function over a sequence. More...

T	LINQ_ElementAt (int index)
	Returns the element at a specified index in a sequence. More...

T	LINQ_ElementAtOrDefault (int index)
	Returns the element at a specified index in a sequence. More...

T	LINQ_First ()
	Returns the first element of a sequence. More...

T	LINQ_First (const Func< T, bool > &predicate)
	Returns the first element of a sequence that satisfy the specified condition. More...

T	LINQ_FirstOrDefault ()
	Returns the first element of a sequence, or a default value if the sequence is empty. More...

T	LINQ_FirstOrDefault (std::function< bool(T)> predicate)
	Returns the first element of the sequence that satisfies a condition or a default value if no such element is found. More...

T	LINQ_Last ()
	Returns the last element of a sequence. More...

T	LINQ_LastOrDefault ()
	Returns the last element of a sequence, or a default value if the sequence is empty. More...

SharedPtr< List< T > >	LINQ_ToList ()
	Creates a List<T> from a sequence. More...

int	LINQ_Count ()
	Returns the number of elements in the sequence (calculated via direct counting). More...

int	LINQ_Count (const Func< T, bool > &predicate)
	Returns the number of elements in the sequence that satisfy the specified condition. More...

System::ArrayPtr< T >	LINQ_ToArray ()
	Creates an array from a sequence. More...

bool	LINQ_All (std::function< bool(T)> predicate)
	Determines whether all elements of a sequence satisfy a condition. More...

bool	LINQ_Any ()
	Determines whether a sequence contains any elements. More...

bool	LINQ_Any (std::function< bool(T)> predicate)
	Determines whether any element of a sequence exists or satisfies a condition. More...

SharedPtr< IEnumerable< T > >	LINQ_Where (std::function< bool(T)> predicate)
	Filters a sequence based on the specified predicate. More...

bool	LINQ_Contains (T value)
	Determines if a sequence contains a specified value. More...

template<typename ResultType >
SharedPtr< IEnumerable< ResultType > >	LINQ_Cast ()
	Casts the elements to the specified type. More...

template<typename Key >
SharedPtr< Linq::IOrderedEnumerable< T > >	LINQ_OrderBy (const Func< T, Key > &keySelector)
	Sorts the elements of a sequence in ascending order according to the key values selected by keySelector. More...

template<typename Key >
SharedPtr< Linq::IOrderedEnumerable< T > >	LINQ_OrderByDescending (const Func< T, Key > &keySelector)
	Sorts the elements of a sequence in descending order according to the key values selected by keySelector. More...

template<typename ResultType >
SharedPtr< IEnumerable< ResultType > >	LINQ_OfType ()
	Filters the elements of the sequence based on the specified type. More...

template<typename ResultType >
SharedPtr< IEnumerable< ResultType > >	LINQ_Select (const Func< T, ResultType > &selector)
	Transforms elements of a sequence. More...

template<typename ResultType >
SharedPtr< IEnumerable< ResultType > >	LINQ_Select (const Func< T, int32_t, ResultType > &selector)
	Transforms each element of a sequence into a new form by incorporating the element's index. More...

SharedPtr< IEnumerable< T > >	LINQ_Concat (SharedPtr< IEnumerable< T > > sequence)
	Concatenates two sequences. More...

SharedPtr< IEnumerable< T > >	LINQ_Reverse ()
	Inverts the order of the elements in a sequence. More...

template<typename Key >
System::SharedPtr< IEnumerable< System::SharedPtr< System::Linq::IGrouping< Key, T > > > >	LINQ_GroupBy (System::Func< T, Key > keyPredicate)
	Groups the elements of a sequence. More...

template<typename ResultType >
SharedPtr< IEnumerable< ResultType > >	LINQ_SelectMany (const Func< T, SharedPtr< IEnumerable< ResultType > > > &selector)
	Projects each element of a sequence and combines the resulting sequences into one sequence. More...

SharedPtr< IEnumerable< T > >	LINQ_Take (int32_t count)
	Returns a specified number of contiguous elements from the start of a sequence. More...

template<typename ResultType >
ResultType	LINQ_Min (const Func< T, ResultType > &selector)
	Invokes a transform function on each element of a generic sequence and returns the minimum resulting value. More...

template<typename ResultType >
ResultType	LINQ_Max (const Func< T, ResultType > &selector)
	Invokes a transform function on each element of a generic sequence and returns the maximum resulting value. More...

iterator	begin ()
	Gets iterator pointing to the first element (if any) of the collection. This iterator can't be used to change a referenced object because GetEnumerator() returns a copy-object of T. More...

iterator	end ()
	Gets iterator pointing right after the last element (if any) of the collection. This iterator can't be used to change a referenced object because GetEnumerator() returns a copy-object of T. More...

const_iterator	begin () const
	Gets iterator pointing to the first element (if any) of the const-qualified instance of the collection. More...

const_iterator	end () const
	Gets iterator pointing right after the last element (if any) of the const-qualified instance of the collection. More...

const_iterator	cbegin () const
	Gets iterator pointing to the first const-qualified element (if any) of the collection. More...

const_iterator	cend () const
	Gets iterator pointing right after the last const-qualified element (if any) of the collection. More...

virtual virtualized_iterator *	virtualizeBeginIterator ()
	Gets the implementation of begin iterator for the current container. More...

virtual virtualized_iterator *	virtualizeEndIterator ()
	Gets the implementation of end iterator for the current container. More...

virtual virtualized_iterator *	virtualizeBeginConstIterator () const
	Gets the implementation of begin const iterator for the current container. More...

virtual virtualized_iterator *	virtualizeEndConstIterator () const
	Gets the implementation of end const iterator for the current container. More...

template<typename Result >
SharedPtr< IEnumerable< Result > >	LINQ_Cast ()

template<typename Result >
SharedPtr< IEnumerable< Result > >	LINQ_OfType ()

template<typename Result >
SharedPtr< IEnumerable< Result > >	LINQ_Select (const Func< Source, Result > &selector)

template<typename Result >
SharedPtr< IEnumerable< Result > >	LINQ_Select (const Func< Source, int32_t, Result > &selector)

template<typename Key >
SharedPtr< Linq::IOrderedEnumerable< Source > >	LINQ_OrderBy (const Func< Source, Key > &keySelector)

template<typename Key >
SharedPtr< Linq::IOrderedEnumerable< Source > >	LINQ_OrderByDescending (const Func< Source, Key > &keySelector)

template<typename Key >
SharedPtr< IEnumerable< SharedPtr< System::Linq::IGrouping< Key, Source > > > >	LINQ_GroupBy (System::Func< Source, Key > keyPredicate)

template<typename Result >
SharedPtr< IEnumerable< Result > >	LINQ_SelectMany (const Func< Source, SharedPtr< IEnumerable< Result > > > &selector)

template<typename ResultType >
ResultType	LINQ_Min (const Func< Source, ResultType > &selector)

template<typename ResultType >
ResultType	LINQ_Max (const Func< Source, ResultType > &selector)

Protected Member Functions
	~HashSet () override
	Destructor. More...

Protected Member Functions inherited from System::Collections::Generic::IEnumerable< T >
	~IEnumerable () override
	Destructor. More...

virtualized_iterator *	GetEnumeratorAsVirtualizedIterator ()
	Gets enumerator instance and prepares it to be used as iterator kernel. More...

virtualized_iterator *	GetEnumeratorAsVirtualizedIterator () const
	Gets enumerator instance and prepares it to be used as iterator kernel. More...

Additional Inherited Members
Static Public Member Functions inherited from System::Object
static bool	ReferenceEquals (ptr const &objA, ptr const &objB)
	Compares objects by reference. More...

template<typename T >
static std::enable_if<!IsSmartPtr< T >::value, bool >::type	ReferenceEquals (T const &objA, T const &objB)
	Compares objects by reference. More...

template<typename T >
static std::enable_if<!IsSmartPtr< T >::value, bool >::type	ReferenceEquals (T const &objA, std::nullptr_t)
	Reference-compares value type object with nullptr. More...

template<typename T1 , typename T2 >
static std::enable_if< IsSmartPtr< T1 >::value &&IsSmartPtr< T2 >::value, bool >::type	Equals (T1 const &objA, T2 const &objB)
	Compares reference type objects in C# style. More...

template<typename T1 , typename T2 >
static std::enable_if<!IsSmartPtr< T1 >::value &&!IsSmartPtr< T2 >::value, bool >::type	Equals (T1 const &objA, T2 const &objB)
	Compares value type objects in C# style. More...

static const TypeInfo &	Type ()
	Implements C# typeof(System.Object) construct. More...

template<>
bool	Equals (float const &objA, float const &objB)
	Emulates C#-style floating point comparison where two NaNs are considered equal even though according to IEC 60559:1989 NaN is not equal to any value, including NaN. More...

template<>
bool	Equals (double const &objA, double const &objB)
	Emulates C#-style floating point comparison where two NaNs are considered equal even though according to IEC 60559:1989 NaN is not equal to any value, including NaN. More...

Detailed Description

template<typename T>
class System::Collections::Generic::HashSet< T >

Forward declaration of HashSet class.

Set implementation based on hashing. Objects of this class should only be allocated using System::MakeObject() function. Never create instance of this type on stack or using operator new, as it will result in runtime errors and/or assertion faults. Always wrap this class into System::SmartPtr pointer and use this pointer to pass it to functions as argument.

Parameters

T

Element type.

#include "system/array.h"
#include "system/collections/hashset.h"
#include "system/smart_ptr.h"
 
void PrintValues(const System::SharedPtr<const System::Collections::Generic::IEnumerable<int>> & collection)
{
  for (auto item: collection)
  {
    std::cout << item << ' ';
  }
  std::cout << std::endl;
}
 
int main()
{
  // Create and fill instances of the HashSet<int> type.
  auto set1 = System::MakeObject<System::Collections::Generic::HashSet<int>>();
  auto set2 = System::MakeObject<System::Collections::Generic::HashSet<int>>();
 
  for (auto i = 0; i < 10; i++)
  {
    set1->Add(i);
    set2->Add(i * 3);
  }
 
  // Print items of the sets.
  PrintValues(set1);
  PrintValues(set2);
 
  // Copy values of the sets to the array and print values.
  auto arr = System::MakeArray<int>(set1->get_Count() + set2->get_Count());
  set1->CopyTo(arr, 0);
  set2->CopyTo(arr, set1->get_Count());
  PrintValues(arr);
 
  return 0;
}
/*
This code example produces the following output:
8 0 1 2 3 4 5 6 7 9
24 0 3 6 9 12 15 18 21 27
8 0 1 2 3 4 5 6 7 9 24 0 3 6 9 12 15 18 21 27
*/

Member Typedef Documentation

◆ BaseType

template<typename T >

using System::Collections::Generic::HashSet< T >::BaseType = BaseSet<T, std::unordered_set<T, EqualityComparerHashAdapter<T>, EqualityComparerAdapter<T>, typename System::Details::CollectionHelpers::ContainerPointerMode<T>::allocator_type> >

Base type.

◆ ThisPtr

template<typename T >

using System::Collections::Generic::HashSet< T >::ThisPtr = SharedPtr<ThisType>

Pointer type.

◆ ThisType

template<typename T >

using System::Collections::Generic::HashSet< T >::ThisType = System::Collections::Generic::HashSet<T>

Self type.

Constructor & Destructor Documentation

◆ HashSet() [1/4]

template<typename T >

System::Collections::Generic::HashSet< T >::HashSet ( )

inline

RTTI information.

Creates empty set.

◆ HashSet() [2/4]

template<typename T >

System::Collections::Generic::HashSet< T >::HashSet ( int capacity )

inline

Creates empty set with specified capacity.

◆ HashSet() [3/4]

template<typename T >

System::Collections::Generic::HashSet< T >::HashSet ( const SharedPtr< IEqualityComparer< T > > & comparer )

inline

Creates empty set that uses the specified equality comparer.

Parameters

comparer Comparer object to associate with hashset.

◆ HashSet() [4/4]

template<typename T >

System::Collections::Generic::HashSet< T >::HashSet ( const SharedPtr< IEnumerable< T > > & items )

inline

Creates hashset based on enumerable values.

◆ ~HashSet()

template<typename T >

System::Collections::Generic::HashSet< T >::~HashSet ( )

inlineoverrideprotected

Destructor.

Public Types

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ BaseType

◆ ThisPtr

◆ ThisType

Constructor & Destructor Documentation

◆ HashSet() [1/4]

◆ HashSet() [2/4]

◆ HashSet() [3/4]

◆ HashSet() [4/4]

◆ ~HashSet()