moveInitialize(fromContentsOf:)
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.
Declaration
func moveInitialize(fromContentsOf source: Slice<UnsafeMutableBufferPointer<Element>>) -> UnsafeMutableBufferPointer<Element>.IndexParameters
- source:
A buffer containing the values to copy. The memory region underlying
sourcemust be initialized.
Return Value
The index one past the last element of the buffer initialized by this function.
Discussion
Prior to calling the moveInitialize(fromContentsOf:) method on a buffer, the memory it references must be uninitialized, or its Element type must be a trivial type. After the call, the memory referenced by the buffer up to, but not including, the returned index is initialized. The memory referenced by source is uninitialized after the function returns. The buffer must reference enough memory to accommodate source.count elements.
The returned index is the position of the next uninitialized element in the buffer, one past the index of the last element written. If source contains no elements, the returned index is equal to the buffer’s startIndex. If source contains as many elements as the buffer can hold, the returned index is equal to the buffer’s endIndex.