Initializerswift 6.0.1Swift
init(rebasing:)
Creates a buffer over the same memory as the given buffer slice.
init(rebasing slice: Slice<UnsafeBufferPointer<Element>>) Parameters
- slice
The buffer slice to rebase.
The new buffer represents the same region of memory as slice, but is indexed starting at zero instead of sharing indices with the original buffer. For example:
let buffer = returnsABuffer()
let n = 5
let slice = buffer[n...]
let rebased = UnsafeBufferPointer(rebasing: slice)After rebasing slice as the rebased buffer, the following are true:
rebased.startIndex == 0rebased[0] == slice[n]rebased[0] == buffer[n]rebased.count == slice.count
Other members in extension
Types
struct IteratorAn iterator for the elements in the buffer referenced by an
UnsafeBufferPointerorUnsafeMutableBufferPointerinstance.
Typealiases
Type members
init(UnsafeMutableBufferPointer<Element>) Creates an immutable typed buffer pointer referencing the same memory as the given mutable buffer pointer.
init(rebasing: Slice<UnsafeMutableBufferPointer<Element>>) Creates a buffer over the same memory as the given buffer slice.
init(start: UnsafePointer<Element>?, count: Int) Creates a new buffer pointer over the specified number of contiguous instances beginning at the given pointer.
Instance members
var baseAddress: UnsafePointer<Element>?A pointer to the first element of the buffer.
let count: IntThe number of elements in 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: UnsafeBufferPointer<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<UnsafeBufferPointer<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 distance(from: Int, to: Int) -> Int func extracting(Range<Int>) -> UnsafeBufferPointer<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>) -> UnsafeBufferPointer<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_) -> ()) -> UnsafeBufferPointer<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 makeIterator() -> UnsafeBufferPointer<Element>.Iterator Returns an iterator over the elements of this buffer.
func withContiguousStorageIfAvailable<R>((UnsafeBufferPointer<Element>) throws -> R) rethrows -> R? func withMemoryRebound<T, E, Result>(to: T.Type, (UnsafeBufferPointer<T>)throws Executes the given closure while temporarily binding the memory referenced by this buffer to the given type.