moveUpdate(fromContentsOf:)
Updates this buffer slice’s initialized memory initialized memory by moving every element from the source buffer slice, leaving the source memory uninitialized.
Declaration
func moveUpdate<Element>(fromContentsOf source: Slice<UnsafeMutableBufferPointer<Element>>) -> Slice<Base>.Index where Base == UnsafeMutableBufferPointer<Element>Parameters
- source:
A buffer slice containing the values to move. The memory region underlying
sourcemust be initialized.
Return Value
An index one past the index of the last element updated.
Discussion
The region of memory starting at the beginning of this buffer slice and covering source.count instances of its Element type must be initialized, or its Element type must be a trivial type. After calling moveUpdate(fromContentsOf:), the region of memory underlying source is uninitialized. The buffer slice must reference enough initialized memory to accommodate source.count elements.
The returned index is one past the index of the last element updated. If source contains no elements, the returned index is equal to the buffer’s startIndex. If source contains as many elements as the buffer slice can hold, the returned index is equal to the slice’s endIndex.