src/test/ui/underscore-lifetime/where-clause-inherent-impl-underscore.rs

   1 // revisions: rust2015 rust2018
   2 //[rust2018] edition:2018
   3
   4 trait WithType<T> {}
   5 trait WithRegion<'a> { }
   6
   7 struct Foo<T> {
   8     t: T
   9 }
  10
  11 impl<T> Foo<T>
  12 where
  13     T: WithRegion<'_>
  14 //[rust2015,rust2018]~^ ERROR `'_` cannot be used here
  15 { }
  16
  17 fn main() {}