withContiguousStorageIfAvailable(_:)
Call body(buffer), where buffer provides access to the non-optional contiguous storage of the entire column. If the column contains missing values, body is not called and nil is returned.
Declaration
func withContiguousStorageIfAvailable<R>(_ body: (UnsafeBufferPointer<WrappedElement>) throws -> R) rethrows -> R?Parameters
- body:
A closure to be executed using the elements of this collection.
Return Value
The value returned by body, or nil.
Discussion
The optimizer can often eliminate bounds- and uniqueness-checking within an algorithm. When that fails, however, invoking the same algorithm on body’s argument may let you trade safety for speed.