Macro UpdateHookUninitialized

macro_rules! UpdateHookUninitialized {
    ($value:ty $(, $($bounds:tt)*)?) => { ... };
    (@ extract_lifetimes_from_generics {
        value! { $value:ty }
        $(generics_info! {
            $({
                $(lifetime_attrs $lifetime_attrs:tt)?
                lifetime {$lt:lifetime}
                $($rest:tt)*
            })*
            $({
                $(const_attrs $const_attrs:tt)?
                $(type_attrs $type_attrs:tt)?
                $(const $const:tt)?
                name $name:tt
                $($rest2:tt)*
            })*
        })?
        // explicitly specified lifetime bounds
        bounds! { $($bounds:tt)* }
    }) => { ... };
}

Expands to an opaque type impl UpdateHookUninitialized with type of Hook::Value.