Projects for Apple platforms usually also use .h, where it could mean anything from C/C++ to Objective-C/C++.

In practice, Clang handles mixed C/C++/Obj-C codebases pretty well and determining the language for a header never really felt like an issue since the API would usually already imply it (declaring a C++ class and/or Obj-C class would require the corresponding language to consume it).

If a C++ header is intended to be consumed from C, adding the usual #ifdef __cplusplus extern "C" {... should alleviate the name mangling issues.

To be fair, the gaming chair also holds you against lateral GeForce

or Swift, Rust has semicolons while Swift doesn’t

Side note: Rust is the only of the three to have an ML-style type system, which is generally agreed upon as one of the most theoretically sound foundations. Also the point is that Rust does it precisely without requiring dynamic allocation, as opposed to Go, for example.

Not OP, but a pretty common reason is having a super-modular and hackable IDE that can be used to develop pretty much anything. Everything is JSON-configurable, all editors are webviews, so adding stuff like HTML rendering in Jupyter notebooks is almost trivial from a technical perspective. Fleet might be a step in the right direction, but still feels like a layer on top of IntelliJ, which is a beast in of itself, plus it is closed-source.

Also the approach of decoupling editors from the language support via LSP might be one of the biggest innovations in this space in recent years, IMO. Having a widely adopted and open protocol for language support effectively made Neovim, Emacs etc. a viable choice. It has spawned several high-quality LSP implementations, often directly supported by the compiler vendors, e.g. clangd or rust-analyzer.

Arguably Microsoft has been monetizing a bunch of services on top of VSCode too and they haven’t always stuck to their own principles (see Pylance, a closed-source language server that only runs in official VSC builds), but the LSP itself was still a pretty big net positive.

Swift does, though using the dollar sign rather than underscores

Just wanted to point that rust-analyzer is the fantastic language server that powers the language support, and it runs in a lot of editors (VS Code, Emacs, Neovim, …)

This is all fun and games until you try moving a backup to a file system that’s case-insensitive

In principle you can, the Mach-O format is openly documented and implemented in the major compilers. The issue is that you need a sysroot (aka SDK) of the frameworks and headers for your target OS, which in Apple’s case are proprietary and cannot be redistributed legally (you could probably rip them out of a macOS installation yourself though). For iOS apps you’d also need to sign the binaries and install the app to the device which is non-trivial to impossible to do on other platforms.

Did you focus the popup containing the Touch ID symbol? Often times it opens defocused and you have to click it to actually use Touch ID.