Currently if we trigger goto defintion here;

struct Foo;

fn foo() -> Foo {
    struct Bar;
    impl From<Bar> for Foo {
        fn from(_: Bar) -> Self {
            Foo
        }
    }
    Bar.into$0()
}

it just takes us to std::convert::Into<T>::into, because we do not have manual implementation of impl Into<Foo> for Bar here.

I think that it would be reasonable to provide two definition sources, std::convert::Into<T>::into(..) with the above fn from(..) inside the impl From<Bar> for Foo { .. } block as well, and implement similar thing to the opposite direction from(..) -> into(..).