swift-composable-architecture VS swift-evolution

TCA for short. Very scalable, quite promising, quite popular. A decent alternative for MVVM enhanced by the Clean Architecture. You can learn more about it in a Point-Free tutorial and on GitHub.

🙏 Built with SwiftUI and The Composable Architecture (TCA): This isn’t a feature, but I just want to express my gratitude to the creators and maintainers of these two frameworks, which have played a huge part in making me fall in love with iOS development.

Razliciti alternativni frameworci i arhitekture - Recimo, na pamet mi padaju Composable Architecture (https://github.com/pointfreeco/swift-composable-architecture) i RIBs arhitektura (https://github.com/uber/RIBs). Ok, ove arhitekture resavaju neke probleme. Ali da li problemi koje te arhitekture resavaju solidan developer ne moze sam da resi bez vendor locka za kreatore tih arhitektura. Jesu one open-source, ali meni je rizik da se vezujem za bilo sta sto sutra moze da prestane da se odrzava.

I came across this post discussing MVM, MVVM, MVP, and composable architecture.

At a minimum, Composable Architecture, and now Dependencies from Point-Free.

I’ve built a couple of apps with this framework: https://github.com/pointfreeco/swift-composable-architecture

While there are apps that use a Redux-style architecture, the arch is still in its infancy in the community. There are a number of implementations each with their own take on Redux. TCA is probably the one with the most name recognition and documentation.

Learn it if the project at hand requires it. A lot of older, more mature apps will still use UIKit, so it’s likely if you plan to work an iOS developer job that you will need it. But it’s getting to the point where a lot of the forward thinking shops are already starting to integrate SwiftUI. (Me being one of them) which, btw, a lot of people will say SwiftUI isn’t quite there yet, and I mostly disagree. SwiftUI is good for a great many use cases. Yes, there are still pain points, but you can write most of the apps you’d need to write in SwiftUI. And there are great architectural frameworks out there that actually give SwiftUI an opinionated way to structure apps that is testable and maintainable. Check out pointfreeco’s The Composable Architecture (https://github.com/pointfreeco/swift-composable-architecture)

According to their changelog[0], Clock was added to the standard library with Swift 5.7, which shipped in 2022, at the same time as iOS 16. It looks like static linking by default was approved[1] but development stalled[2].

I expect that it's as simple as that: It's supported on iOS 16+ because it's dynamically linked by default, against a system-wide version of the standard library. You can probably try to statically link newer versions on old OS versions, or maybe ship a newer version of the standard library and dynamically link against that, but I have no idea how well those paths are supported.

0. https://github.com/apple/swift/blob/main/CHANGELOG.md

1. https://github.com/apple/swift-evolution/blob/main/proposals...

2. https://github.com/apple/swift-package-manager/pull/3905

[A Vision for Embedded Swift](https://github.com/apple/swift-evolution/blob/main/visions/e...) has the details on this new build mode and is quite interesting.

> Effectively, there will be two bottom layers of Swift, and the lower one, “non-allocating” Embedded Swift, will necessarily be a more restricted compilation mode (e.g. classes will be disallowed as they fundamentally require heap allocations) and likely to be used only in very specialized use cases. “Allocating” Embedded Swift should allow classes and other language facilities that rely on the heap (e.g. indirect enums).

Also, this seems to maybe hint at the Swift runtime eventually being reimplemented in non-allocating Embedded Swift rather than the C++ (?) that it uses now:

> The Swift runtime APIs will be provided as an implementation that’s optimized for small codesize and will be available as a static library in the toolchain for common CPU architectures. Interestingly, it’s possible to write that implementation in “non-allocating” Baremetal Swift.

I may be out of my depth here as I've only casually used Rust, but this seems similar to Swift's proposed lifetime dependencies[1]. They're not in the type system formally so maybe they're closer to poloneius work

[1]: https://github.com/apple/swift-evolution/blob/3055becc53a3c3...

Swift recently adopted a region-based approach for safe concurrency that builds on Milano et al’s ideas: https://github.com/apple/swift-evolution/blob/main/proposals...

No, it's not. Refcounting CAN be a garbage collection algorithm, but in Swift it's deterministic and done at compile time. Not to mention recently added support for non-copyable types that enforces unique ownership: https://github.com/apple/swift-evolution/blob/main/proposals...

You can stackallocate buffers with unsafe Swift but it's not exactly fun to use. https://github.com/apple/swift-evolution/blob/main/proposals/0322-temporary-buffers.md