ufmt

> But what use case do you have for printf that can't be implemented with println!/format! and friends? I'm guessing they mean that the format! machinery is rather complex and brings in a lot of code. That it's also somewhat slow is a recurring concern . Have none of the embedded folks created a specialised version of format! which is not generic, and basically only supports the types and styles which c's printf supports? edit: there's ufmt though it seems somewhat inactive and I've no idea how good it is: https://github.com/japaric/ufmt > Optimized for binary size and speed (rather than for compilation time) > No dynamic dispatch in generated code

You can assign numeric values to enum variants in Rust too like so: enum Field { Foo = 0b11111111, Bar = 0b10101010, } fn main() { println!("{}", Field::Foo as u8); println!("{}", Field::Bar as u8); } There is also the bitflags crate: https://docs.rs/bitflags/1.2.1/bitflags/ For lighter weight formatting there is https://github.com/japaric/ufmt