Struct NativeHashSet<T>
An unordered, expandable set of unique values.
Namespace: Unity.Collections
Syntax
[NativeContainer]
public struct NativeHashSet<T> : INativeDisposable, IDisposable, IEnumerable<T>, IEnumerable where T : struct, IEquatable<T>Type Parameters
| Name | Description |
|---|---|
| T | The type of the values. |
Remarks
Not suitable for parallel write access. Use NativeParallelHashSet<T> instead.
Constructors
NativeHashSet(Int32, AllocatorManager.AllocatorHandle)
Initializes and returns an instance of NativeParallelHashSet.
Declaration
public NativeHashSet(int initialCapacity, AllocatorManager.AllocatorHandle allocator)Parameters
| Type | Name | Description |
|---|---|---|
| Int32 | initialCapacity | The number of values that should fit in the initial allocation. |
| AllocatorManager.AllocatorHandle | allocator | The allocator to use. |
Properties
Capacity
The number of values that fit in the current allocation.
Declaration
public int Capacity { readonly get; set; }Property Value
| Type | Description |
|---|---|
| Int32 | The number of values that fit in the current allocation. |
Count
Returns the current number of values in this set.
Declaration
public readonly int Count { get; }Property Value
| Type | Description |
|---|---|
| Int32 | The current number of values in this set. |
IsCreated
Whether this set has been allocated (and not yet deallocated).
Declaration
public readonly bool IsCreated { get; }Property Value
| Type | Description |
|---|---|
| Boolean | True if this set has been allocated (and not yet deallocated). |
IsEmpty
Whether this set is empty.
Declaration
public readonly bool IsEmpty { get; }Property Value
| Type | Description |
|---|---|
| Boolean | True if this set is empty or if the set has not been constructed. |
Methods
Add(T)
Adds a new value (unless it is already present).
Declaration
public bool Add(T item)Parameters
| Type | Name | Description |
|---|---|---|
| T | item | The value to add. |
Returns
| Type | Description |
|---|---|
| Boolean | True if the value was not already present. |
AsReadOnly()
Returns a readonly version of this NativeHashSet instance.
Declaration
public NativeHashSet<T>.ReadOnly AsReadOnly()Returns
| Type | Description |
|---|---|
| NativeHashSet.ReadOnly<> | ReadOnly instance for this. |
Remarks
ReadOnly containers point to the same underlying data as the NativeHashSet it is made from.
Clear()
Removes all values.
Declaration
public void Clear()Remarks
Does not change the capacity.
Contains(T)
Returns true if a particular value is present.
Declaration
public bool Contains(T item)Parameters
| Type | Name | Description |
|---|---|---|
| T | item | The item to look up. |
Returns
| Type | Description |
|---|---|
| Boolean | True if the value was present. |
Dispose()
Releases all resources (memory and safety handles).
Declaration
public void Dispose()Dispose(JobHandle)
Creates and schedules a job that will dispose this set.
Declaration
public JobHandle Dispose(JobHandle inputDeps)Parameters
| Type | Name | Description |
|---|---|---|
| JobHandle | inputDeps | A job handle. The newly scheduled job will depend upon this handle. |
Returns
| Type | Description |
|---|---|
| JobHandle | The handle of a new job that will dispose this set. |
Implements
GetEnumerator()
Returns an enumerator over the values of this set.
Declaration
public NativeHashSet<T>.Enumerator GetEnumerator()Returns
| Type | Description |
|---|---|
| NativeHashSet.Enumerator<> | An enumerator over the values of this set. |
Remove(T)
Removes a particular value.
Declaration
public bool Remove(T item)Parameters
| Type | Name | Description |
|---|---|---|
| T | item | The value to remove. |
Returns
| Type | Description |
|---|---|
| Boolean | True if the value was present. |
ToNativeArray(AllocatorManager.AllocatorHandle)
Returns an array with a copy of this set's values (in no particular order).
Declaration
public NativeArray<T> ToNativeArray(AllocatorManager.AllocatorHandle allocator)Parameters
| Type | Name | Description |
|---|---|---|
| AllocatorManager.AllocatorHandle | allocator | The allocator to use. |
Returns
| Type | Description |
|---|---|
| NativeArray<T> | An array with a copy of the set's values. |
TrimExcess()
Sets the capacity to match what it would be if it had been originally initialized with all its entries.
Declaration
public void TrimExcess()