index(_:offsetBy:)

Other members in extension

Typealiases

• typealias Index
• typealias Indices
• typealias Iterator
• typealias SubSequence

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.

• let count: Int

  The number of elements in the buffer.

• var debugDescription: String

  A textual representation of the buffer, suitable for debugging.

• var endIndex: Int

  The “past the end” position—that is, the position one greater than the last valid subscript argument.

• var indices: UnsafeMutableBufferPointer<Element>.Indices
• var isEmpty: Bool

  A Boolean value indicating whether the buffer is empty.

• var startIndex: Int

  The 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, 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 index to 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.