Call Swift From Python

[hggz]

just found this and figured I'd drop it here

Formalizing @cdecl

For a while now (possibly since Swift 1?) we've had an undocumented attribute @_cdecl that exposes a Swift function to C. Several years ago (and while still at Apple), I alluded to the remaining decisions to we had to make to make @cdecl a reality. I was hoping someone else would pick that up, but it hasn't happened yet; meanwhile, though, people are using it. So here it is: what we need to decide, along with my recommendations: The name. I think @cdecl is our best choice, because @c is so sh…