Switch derive macro doesn't handle type parameters

[hgzimmerman]

Describe the Bug

I want to support the following wrapper:

#[derive(Switch, Debug, Clone)]
#[to="{*:_path}#{route}"]
pub struct FragmentAdapter<T: Switch> {
   _path: String,
    route: T
}

This fails with the error:

    | pub struct FragmentAdapter<T: Switch> {
    |            ^^^^^^^^^^^^^^^ expected 1 type argument

Expected Behavior

This should instead derive Switch for the struct instead of panicking.

Related Info

• yew-router version: master