Option <---> Optional

Rust's Option is seen on the Swift side as a Swift Optional.

Example

#![allow(unused)]
fn main() {
// Rust

#[swift_bridge::bridge]
mod ffi {
    extern "Rust" {
        fn make_rust_option() -> Option<u8>;
    }

    extern "Swift" {
        fn make_swift_optional() -> Option<bool>;
    }
}

fn make_rust_option() -> Option<u8> {
    if ffi::make_swift_optional == Some(true) {
        Some(111)
    } else {
        None
    }
}
}

// Swift

func call_rust_and_divide_by_2() -> Optional<UInt8> {
    if case let val? = make_rust_option() {
        return val / 2
    } else {
        nil
    }
}

func make_swift_optional() -> Bool? {
    true
}