fast_delegate_derive is a procedural macro. It will run at compile time and transform your program's source code.

Adding `fast_delegate_derive` macro(s) as a dependency

Run this command in a terminal, in your project's directory:

cargo add fast_delegate_derive

To add it manually, edit your project's Cargo.toml file and add to the [dependencies] section:

fast_delegate_derive = "0.13.0"

You may need to import the macro(s) with use fast_delegate_derive::*.

Read the fast_delegate_derive documentation.

Back to the crate overview.

Readme

`fast_delegate`

Pros

Faster than auto_delegate crate
Easier than deleagate crate

Cons

All delegatable traits must be object safe.

example of this crate

#[delegate]
pub trait Read {
    fn read(&self) -> &usize;
}

#[derive(Delegate)]
struct Wrapper<R>
where
    R: Read,
{
    #[to(Read)]
    inner: R,
}

struct Io {
    value: usize,
}

impl Read for Io {
    fn read(&self) -> &usize {
        &self.value
    }
}

fn main() {
    let wrapper = Wrapper {
        inner: Io { value: 1 },
    };
    wrapper.read();
}

Adding fast_delegate_derive macro(s) as a dependency

Adding `fast_delegate_derive` macro(s) as a dependency