Macro rfc::PromiseTransmutable

macro_rules! PromiseTransmutable {
    ($item:item) => { ... };
}

🔬 This is a nightly-only experimental API. (stability_shorthand)

Derive macro generating impls of both PromiseTransmutableFrom and PromiseTransmutableInto.

This is just a shorthand for deriving both PromiseTransmutableFrom! and PromiseTransmutableInto!.

For more information on this extension, see here.