initializeMemory(as:from:)
Initializes the buffer’s memory with the given elements, binding the initialized memory to the elements’ type.
func initializeMemory<S>(as type: S.Element.Type, from source: S) -> (unwritten: S.Iterator, initialized: UnsafeMutableBufferPointer<S.Element>) where S : Sequence Parameters
Returns
An iterator to any elements of source that didn’t fit in the buffer, and a typed buffer of the written elements. The returned buffer references memory starting at the same base address as this buffer.
When calling the initializeMemory(as:from:) method on a buffer b, the memory referenced by b must be uninitialized or initialized to a trivial type, and must be properly aligned for accessing S.Element. The buffer must contain sufficient memory to accommodate source.underestimatedCount.
This method initializes the buffer with elements from source until source is exhausted or, if source is a sequence but not a collection, the buffer has no more room for source’s elements. After calling initializeMemory(as:from:), the memory referenced by the returned UnsafeMutableBufferPointer instance is bound and initialized to type S.Element. This method does not change the binding state of the unused portion of b, if any.