Stack-allocated collections

[stuchlej (Mikoláš Stuchlík)]

You can always try to implement your own copy-on-write fixed-size collection using ManagedBuffer.

Using ManagedBuffer as alloca?

Since classes that don’t escape the scope are allocated on the stack, does this mean we can use ManagedBuffer as a swift version of alloca? let buffer:ManagedBuffer<Void, UInt8> = .create(minimumCapacity: count){ _ in } buffer.withUnsafeMutablePointerToElements { ... } is this valid swift?

I believe this class allows you to access the same optimisations as most of the Swift native collections use. It is widely used by the swift-collections repo (for example).