ManagedBufferPointer

Overview

For most purposes, the ManagedBuffer class can be used on its own. However, in cases where objects of various different classes must serve as storage, you need to also use ManagedBufferPointer.

A valid buffer class is non-@objc, with no declared stored properties. Its deinit must destroy its stored Header and any constructed Elements.

Example Buffer Class

 class MyBuffer<Element> { // non-@objc
   typealias Manager = ManagedBufferPointer<(Int, String), Element>
   deinit {
     Manager(unsafeBufferObject: self).withUnsafeMutablePointers {
       (pointerToHeader, pointerToElements) -> Void in
       pointerToElements.deinitialize(count: self.count)
       pointerToHeader.deinitialize(count: 1)
     }
   }

   // All properties are *computed* based on members of the Header
   var count: Int {
     return Manager(unsafeBufferObject: self).header.0
   }
   var name: String {
     return Manager(unsafeBufferObject: self).header.1
   }
 }