Since the inception of the platforms, macOS and iOS developers have had access to the Foundation framework, a collection of classes and utilities that provide a foundational set of functionality that will be needed to perform common programming tasks, including networking, date manipulation and formatting, and localization.
It was, therefore, necessary to provide the functionality of Foundation as part of the open sourcing efforts, especially for non-Apple platforms, where the existing Foundation framework is not available due to its reliance on the Objective-C runtime. To this end, Apple has released an open source, Swift-based version of Foundation as a core library, which can be found at https://github.com/apple/swift-corelibs-foundation.
In addition to providing the Foundation functionality to non-Apple platforms, the version of Foundation included with Swift also...
