TL;DR: I want to contribute to the standard library, how can I do that without needing to build the entire Swift project?
I've enjoyed discussing ideas on here, but I would like to actually implement things. As a simple starter, I'd like to implement an extension on Optional (from this pitch). Even if it gets rejected in evolution, it seems like a simple feature to start with.
Is there a way to develop only the standard library? I don't have the 70 GB of free disk space that is required for building the Swift project. I also don't see myself overcoming the hurdles of jumping into C++ development (at least until the far, faaaaaaaaar future), so I don't really need to have my own build of the compiler, if it can be avoided.
Also, I've been rummaging a lot through the source code of Swift standard library. Naturally, ctrl-f and GitHub search are quite tedious. It would be much nicer to be able to open this up in Xcode and "jump to definition" all over the place. Is there a way to pull in the standard library's source into my personal projects, so if I command click on a standard library API, it'll take me to the real source, rather than the generated interface?