It is not possible to build "swift-3" branch. Generates a lot of errors. Some of them is bellow:
Generator.swift:81:27: 'withUnsafePointer' has been renamed to 'withUnsafePointer(to::)'
Generator.swift:82:44: 'init' is unavailable: use 'withMemoryRebound(to:capacity:)' to temporarily view memory as another layout-compatible type.