Macro tokio_util::either::delegate_call

macro_rules! delegate_call {
    ($self:ident.$method:ident($($args:ident),+)) => { ... };
}

A small helper macro which reduces amount of boilerplate in the actual trait method implementation. It takes an invocation of method as an argument (e.g. self.poll(cx)), and redirects it to either enum variant held in self.