Instance Propertyswift 6.0.1Swift
count
The number of elements in the buffer.
let count: IntIf the baseAddress of this buffer is nil, the count is zero. However, a buffer can have a count of zero even with a non-nil base address.
Other members in extension
Typealiases
Type members
init(mutating: UnsafeBufferPointer<Element>) Creates a mutable typed buffer pointer referencing the same memory as the given immutable buffer pointer.
init(rebasing: Slice<UnsafeMutableBufferPointer<Element>>) Creates a buffer over the same memory as the given buffer slice.
init(start: UnsafeMutablePointer<Element>?, count: Int) Creates a new buffer pointer over the specified number of contiguous instances beginning at the given pointer.
static func allocate(capacity: Int) -> UnsafeMutableBufferPointer<Element> Allocates uninitialized memory for the specified number of instances of type
Element.
Instance members
var baseAddress: UnsafeMutablePointer<Element>?A pointer to the first element of the buffer.
var debugDescription: StringA textual representation of the buffer, suitable for debugging.
var endIndex: IntThe “past the end” position—that is, the position one greater than the last valid subscript argument.
var indices: UnsafeMutableBufferPointer<Element>.Indicesvar isEmpty: BoolA Boolean value indicating whether the buffer is empty.
var startIndex: IntThe index of the first element in a nonempty buffer.
subscript(Int) -> Element Accesses the element at the specified position.
subscript(Range<Int>) -> Slice<UnsafeMutableBufferPointer<Element>> Accesses a contiguous subrange of the buffer’s elements.
subscript(Int) -> Element Accesses the element at the specified position.
func deallocate() Deallocates the memory block previously allocated at this buffer pointer’s base address.
func deinitialize() -> UnsafeMutableRawBufferPointer Deinitializes every instance in this buffer.
func deinitializeElement(at: UnsafeMutableBufferPointer<Element>.Index) Deinitializes the memory underlying the element at
index.func distance(from: Int, to: Int) -> Int func extracting(Range<Int>) -> UnsafeMutableBufferPointer<Element> Constructs a standalone buffer pointer over the items within the supplied range of positions in the memory region addressed by this buffer pointer.
func extracting(some RangeExpression<Int>) -> UnsafeMutableBufferPointer<Element> Constructs a standalone buffer pointer over the items within the supplied range of positions in the memory region addressed by this buffer pointer.
func extracting((UnboundedRange_) -> ()) -> UnsafeMutableBufferPointer<Element> Extracts and returns a copy of the entire buffer.
func formIndex(after: inout Int) func formIndex(before: inout Int) func index(Int, offsetBy: Int) -> Int func index(Int, offsetBy: Int, limitedBy: Int) -> Int? func index(after: Int) -> Int func index(before: Int) -> Int func initialize<S>(from: S) -> (unwritten: S.Iterator, index: UnsafeMutableBufferPointer<Element>.Index) Initializes the buffer’s memory with the given elements.
func initialize(fromContentsOf: some Collection<Element>) -> UnsafeMutableBufferPointer<Element>.Index Initializes the buffer’s memory with every element of the source.
func initialize(repeating: Element) Initializes every element in this buffer’s memory to a copy of the given value.
func initializeElement(at: UnsafeMutableBufferPointer<Element>.Index, to: consuming Element) Initializes the element at
indexto the given value.func makeIterator() -> UnsafeMutableBufferPointer<Element>.Iterator Returns an iterator over the elements of this buffer.
func moveElement(from: UnsafeMutableBufferPointer<Element>.Index) -> Element Retrieves and returns the element at
index, leaving that element’s underlying memory uninitialized.func moveInitialize(fromContentsOf: Slice<UnsafeMutableBufferPointer<Element>>) -> UnsafeMutableBufferPointer<Element>.Index Moves every element of an initialized source buffer into the uninitialized memory referenced by this buffer, leaving the source memory uninitialized and this buffer’s memory initialized.
func moveInitialize(fromContentsOf: UnsafeMutableBufferPointer<Element>) -> UnsafeMutableBufferPointer<Element>.Index Moves every element of an initialized source buffer into the uninitialized memory referenced by this buffer, leaving the source memory uninitialized and this buffer’s memory initialized.
func moveUpdate(fromContentsOf: Slice<UnsafeMutableBufferPointer<Element>>) -> UnsafeMutableBufferPointer<Element>.Index Updates this buffer’s initialized memory initialized memory by moving every element from the source buffer slice, leaving the source memory uninitialized.
func moveUpdate(fromContentsOf: UnsafeMutableBufferPointer<Element>) -> UnsafeMutableBufferPointer<Element>.Index Updates this buffer’s initialized memory initialized memory by moving every element from the source buffer, leaving the source memory uninitialized.
func swapAt(Int, Int) Exchanges the values at the specified indices of the buffer.
func update<S>(from: S) -> (unwritten: S.Iterator, index: UnsafeMutableBufferPointer<Element>.Index) Updates the buffer’s initialized memory with the given elements.
func update(fromContentsOf: some Collection<Element>) -> UnsafeMutableBufferPointer<Element>.Index Updates the buffer’s initialized memory with every element of the source.
func update(repeating: Element) Updates every element of this buffer’s initialized memory.
func withContiguousMutableStorageIfAvailable<R>((inout UnsafeMutableBufferPointer<Element>) throws -> R) rethrows -> R? func withContiguousStorageIfAvailable<R>((UnsafeBufferPointer<Element>) throws -> R) rethrows -> R? func withMemoryRebound<T, E, Result>(to: T.Type, (UnsafeMutableBufferPointer<T>)throws Executes the given closure while temporarily binding the memory referenced by this buffer to the given type.