> On Sep 23, 2016, at 1:55 AM, Gerriet M. Denkmann via swift-users > <swift-users@swift.org> wrote: > > >> On 23 Sep 2016, at 15:47, Gerriet M. Denkmann via swift-users >> <swift-users@swift.org> wrote: >> >> This used to work in Swift 2.2: >> >> var bitfield: UnsafeMutablePointer<UInt8>? >> bitfield = UnsafeMutablePointer<UInt8>( malloc( 888 ) ) >> >> How is this written in Swift 3.0? > > To answer my own question: > This works: > var bitfield: UnsafeMutableRawPointer > bitfield = UnsafeMutableRawPointer( malloc(888)) > > But then this stops working: > let theByte = self.bitfield[ 5 ] > > Somehow the bitfield must know that it is a field of bytes (not shorts, ints > or whatever). But how?
The RawPointer types provide methods that can load a value with a given offset and type for you. IIRC, `bitfield.load(fromByteOffset: 0, as: UInt8.self)` will do what you want. -Joe _______________________________________________ swift-users mailing list swift-users@swift.org https://lists.swift.org/mailman/listinfo/swift-users
