trait Test {
type Test;
fn test() -> Self::Test;
}
#[impl_trait_for_tuples::impl_for_tuples(2)]
impl Test for Tuple {
for_tuples!( type Test = ( #( Tuple::Test ),* ); );
fn test() -> Self::Test {
for_tuples!( ( #( Tuple.test() )$* ) )
}
}
fn main() {}