src/test/ui/nll/ty-outlives/impl-trait-captures.rs

   1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // compile-flags:-Zborrowck=mir -Zverbose
  12
  13 #![allow(warnings)]
  14
  15 trait Foo<'a> {
  16 }
  17
  18 impl<'a, T> Foo<'a> for T { }
  19
  20 fn foo<'a, T>(x: &T) -> impl Foo<'a> {
  21     x
  22         //~^ ERROR explicit lifetime required in the type of `x` [E0621]
  23 }
  24
  25 fn main() {}