[swift-dev] Is SE-0138 UnsafeRawBufferPointer included in Xcode 8 beta 3?

[Norio Nomura]

The release notes of Xcode 8.1 beta 3 said:
> Two types have been added to the Swift standard library: UnsafeRawBufferPointer
and UnsafeMutableRawBufferPointer.

But I'm getting errors on building sample codes in release notes:
```

*➜  **9:10:46 * DEVELOPER_DIR=/Applications/Xcode-beta.app swift

Welcome to Apple Swift version 3.0.1 (swiftlang-800.0.56 clang-800.0.42).
Type :help for assistance.

  1> struct Header {

  2.     var x: Int

  3.     var y: Float

  4. }

  5.

  6. var header = Header(x: 0, y: 0.0)

  7. var byteBuffer = [UInt8]()

  8. withUnsafeBytes(of: &header) { (bytes: UnsafeRawBufferPointer) in

  9.     byteBuffer += bytes

 10. }

 11.

 12. let intArray = [1, 2, 3]

 13.

 14. intArray.withUnsafeBytes { (bytes: UnsafeRawBufferPointer) in

 15.     byteBuffer += bytes

 16. }

error: repl.swift:8:1: error: use of unresolved identifier 'withUnsafeBytes'

withUnsafeBytes(of: &header) { (bytes: UnsafeRawBufferPointer) in

^~~~~~~~~~~~~~~


error: repl.swift:8:40: error: use of undeclared type
'UnsafeRawBufferPointer'

withUnsafeBytes(of: &header) { (bytes: UnsafeRawBufferPointer) in

                                       ^~~~~~~~~~~~~~~~~~~~~~


error: repl.swift:14:36: error: use of undeclared type
'UnsafeRawBufferPointer'

intArray.withUnsafeBytes { (bytes: UnsafeRawBufferPointer) in

                                   ^~~~~~~~~~~~~~~~~~~~~~



  1>

```

Am I missing something needed for using them?
Thanks,

Norio Nomura @norio_nomura
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