error: missing `fn` for function definition
  --> $DIR/pub-ident-fn-with-lifetime.rs:3:4
   |
LL | pub   foo<'a>(_s: &'a usize) -> bool { true }
   |    ^^^
   |
help: add `fn` here to parse `foo` as a public function
   |
LL | pub fn foo<'a>(_s: &'a usize) -> bool { true }
   |     ++

error: aborting due to previous error