swift-bridge VS swift

A bit late, but `swift-bridge` (https://github.com/chinedufn/swift-bridge) does this intelligently, and is probably what you're looking for.

4) Another route that I tried is to develop a simple terminal app using SwiftUI with a Xcode project to build that app + link against a Rust library compiled for iOS with the actual logic. I used swift-bridge for this and it works really well, to the point where I have a custom logger that you can simply use the print stuff to SwiftUI from Rust using the log crate. Once I have a bit more time, I will probably try figuring out how to clean this up a bit more.

Since Swift is your first target, I might recommend swift-bridge which can generate bindings for Rust async fns that Swift can call directly.

I'm working on getting my GUI crate (https://github.com/audulus/rui) working on iOS (https://github.com/audulus/rui-ios). Multitouch will be fun. Shout out to the excellent work in swift-bridge: https://github.com/chinedufn/swift-bridge.

So that class SwiftString was actually unused. I've removed it here https://github.com/chinedufn/swift-bridge/pull/33 .

Here's an example of a Rust library that exposes an async function that uses reqwest to make an API call, and a main.swift that calls that async function.

Have you tried Swift Bridge? https://github.com/chinedufn/swift-bridge

Because of C/C++ interop, and integration with CMake, you can just add Swift to a Zephyr project and it pretty much Just Works. [The docs](https://github.com/apple/swift/blob/main/docs/EmbeddedSwift/...) should mostly apply to the Zephyr SDK as well.

Fortunately, the Observation framework is part of the Swift 5.9 standard library. We can learn more information by examining its source code.

They do! See https://github.com/apple/swift/blob/main/docs/LibraryEvoluti...

You can also see an example of what a different high level language integration with Swift ABI looks like here: https://github.com/dotnet/designs/blob/main/proposed/swift-i...

So is differentiable Swift a package for Swift or is it part of the Swift standard library? The video says go to swift.org but I can't find any info about differentiable Swift on that site.

Swift's Differentiable Programming Manifesto. Swift has a powerful differentiable programming component, integrated with the compiler.

You can do the same thing the other way around - https://github.com/apple/swift/blob/main/docs/Android.md.

Codable (along with other derived conformances like Equatable, Hashable, and RawRepresentable) is indeed built in to the compiler[0], but unlike Serde, it operates during type-checking on a fully-constructed AST (with access to type information), manipulating the AST to insert code. Because it operates at a later stage of compilation and at a much higher level (with access to type information), the work necessary is significantly less.

With ongoing work for Swift macros, it may eventually be possible to rip this code out of the compiler and rewrite it as a macro, though it would need to be a semantic macro[1] rather a syntactic one, which isn't currently possible in Swift[2].

[0] https://github.com/apple/swift/blob/main/lib/Sema/DerivedCon...

`Int` is a regular struct with a single stored property of type `Builtin.Word` . But the latter is a magical compiler built-in. Source for integer types is generated from this template - https://github.com/apple/swift/blob/9da65ca0a15fdf341649c994b0a77ec3b71f2687/stdlib/public/core/IntegerTypes.swift.gyb