Call body(p), where p is a pointer to the collection’s mutable contiguous storage. If no such storage exists, it is first created. If the collection does not support an internal representation in a form of mutable contiguous storage, body is not called and nil is returned.
SDK
- Xcode 10.2+
Framework
- Swift Standard Library
Declaration
mutating func withContiguousMutableStorageIfAvailable<R>(_ body: (inout UnsafeDiscussion
Often, the optimizer can eliminate bounds- and uniqueness-checks within an algorithm, but when that fails, invoking the same algorithm on body\ ’s argument lets you trade safety for speed.