error[E0392]: parameter `N` is never used
  --> $DIR/unused-type-param-suggestion.rs:3:16
   |
LL | struct Example<N>;
   |                ^ unused parameter
   |
   = help: consider removing `N`, referring to it in a field, or using a marker such as `PhantomData`
   = help: if you intended `N` to be a const parameter, use `const N: usize` instead

error: aborting due to previous error

For more information about this error, try `rustc --explain E0392`.