mm implementation files link through to the original C++ code. h headers are compiled and translated over to Swift using low level optimised toll-free bridges and the backend. h header files while allowing the ability to mix C++ and Objective-C code and types within special implementation files given the. This weird and rarely discussed or documented compilation capability provides Objective-C types and method signatures via the. However, Objective-C being a superset of C and a rival alternative to C++ before it was created by Bjarne Stroustrup has many tricks up its sleeve and offers a weird intermediate franken-mode called Objective-C++. While there is ongoing debate about how best to support a direct Swift C++ interop there is nothing available at this time in a stable and reliable fashion. Additionally there are a number of bazel build rules developed by Google to provide comprehensive support for the complexity of the myriad of compilation, bundling and linking approaches available for a suite of OS's and hardware platforms that the world's largest cross-device computing brand has created. Bazel is a wonderful tool, with fast multi-threaded, deterministic, cache safe builds. Part of the initial goal for SwiftDP was to ensure the battle tested Google Differential Privacy C++ library was left untouched and that we utilised the existing Bazel build infrastructure as much as possible. This prototypical Apple development language from 1984 actually harkens back to the days of NextStep, the company Steve Jobs founded in his time away from Apple. To maintain backwards compatibility with decades of software written for Apple platforms, Swift allows for a fairly straight forwards mechanism to link and call code from its predecessor language Objective-C. While there are several ways to create iPhone apps or even compile programs for macOS, by and large the majority of Apple development is now done in or leveraging the Swift toolchain. The primary programming language for iOS (plus macOS, iPadOS, tvOS, watchOS) has in recent years become Swift, a beautiful, modern, performant and typesafe language written by the Apple Swift Team and Chris Lattner the main developer of the ubiquitous LLVM compiler infrastructure project. What were some of the challenges you faced?ĭevelopment for iOS / Apple platforms is an interesting beast. The goal of SwiftDP is to provide the power and speed of Google's Differential Privacy C++ Library to the 1.4 Billion active Apple devices world wide, many of which are iPhones. Here he shares his thoughts on the sometimes difficult journey to bring Google's differential privacy library to iOS: Why SwiftDP? Madhava Jay, iOS ecosystem lead for OpenMined's Differential Privacy team recently released the alpha verision of SwiftDP.
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