Nerd here! That part of the code ends up not needing to go through the UnsafeRawPointer API, as it's processing UTF-8 bytes, see also: <https://github.com/bignerdranch/Freddy/pull/191>.
That being said, good resources for reading about the new pointer system are: - [SE-0107]: <https://github.com/apple/swift-evolution/blob/master/proposals/0107-unsaferawpointer.md> - [The Apple API reference], once it's updated: <https://developer.apple.com/reference/swift> You can also look up the documentation using the "Documentation and API Reference" menu in Xcode 8 Beta 6, as it's currently updated. Sincerely, Zachary Waldowski zach...@bignerdranch.com On Mon, Aug 15, 2016, at 03:05 PM, Dave Reed via swift-users wrote: > I'm trying to convert the following code (from the Big Nerd Ranch's > Freddy JSON parser) that works in Xcode 8 beta 5 and convert it to work > with beta 6. Essentially it appears it needs to take a Data object and > convert it to a UnsafeBufferPointer<UInt8> if I understand it correctly. > > > /// Creates a `JSONParser` ready to parse UTF-8 encoded `NSData`. > /// > /// If the data is mutable, it is copied before parsing. The data's > lifetime > /// is extended for the duration of parsing. > init(utf8Data inData: Data) { > let data = (inData as NSData).copy() as! Data > let buffer = UnsafeBufferPointer(start: > UnsafePointer<UInt8>((data as NSData).bytes), count: data.count) > self.init(buffer: buffer, owner: data) > } > > And this case appears to be going from a String to > UnsafeBufferPointer<Uint8> > > > /// Creates a `JSONParser` from the code units represented by the > `string`. > /// > /// The synthesized string is lifetime-extended for the duration of > parsing. > init(string: String) { > let codePoints = string.nulTerminatedUTF8 > let buffer = codePoints.withUnsafeBufferPointer { > nulTerminatedBuffer in > // don't want to include the nul termination in the buffer - > trim it off > UnsafeBufferPointer(start: nulTerminatedBuffer.baseAddress, > count: nulTerminatedBuffer.count - 1) > } > self.init(buffer: buffer, owner: codePoints) > } > > } > > > I understand pointers from my C/C++/Objective-C days but I don't yet > understand the various Swift pointer types. Any help is appreciated. > > Note: I don't work for Big Nerd Ranch. I'm just trying to use the code > and better understand the various Swift pointer types. > > Thanks, > Dave Reed > > > _______________________________________________ > swift-users mailing list > swift-users@swift.org > https://lists.swift.org/mailman/listinfo/swift-users _______________________________________________ swift-users mailing list swift-users@swift.org https://lists.swift.org/mailman/listinfo/swift-users
