News for hackers. Stuff that matters.

A comment on Swift System Is Now Open Source. Parent comment

Re:Swift System Is Now Open Source by ladon86 on Friday September 25, 2020 @05:10PM (#24594128)
My understanding was that there is no need to involve Objective-C if you’re directly interfacing with C. That interop is direct/seamless, and works on Linux etc. even without Objective-C or Darwin [0].

But the C++ story is what you’ve described above.

[0] https://developer.apple.com/documentation/swift/imported_c_a...

and

https://developer.apple.com/documentation/swift/imported_c_a...

[ Parent | on HN ]
Re:Swift System Is Now Open Source by wool_gather on Saturday September 26, 2020 @12:40PM (#24600106)
I wouldn't say "seamless". Interacting with C directly from Swift is possible, and fine from a binary perspective, but quite clunky at the source level. (Which obviously is a motivation for the library that is being announced here.)

There are still assorted gaps in C imports -- a key example is forward-declared structs, that _all_ arrive in Swift as a _single shared_ `OpaquePointer` type: https://forums.swift.org/t/opaque-pointers-in-swift/6875

[ Parent | on HN ]