You may want to check out Zig's async/await. Seems to be closer to what you're suggesting. It's one of the few implementations where functions don't have an "as

You may want to check out Zig's async/await. Seems to be closer to what you're suggesting. It's one of the few implementations where functions don't have an "async"/"no-async" color, and where you use the same IO functions regardless of whether you want to use them asynchronously or synchronously (if I remember correctly).