src/test/ui/impl-unused-rps-in-assoc-type.rs

   1 // Copyright 2015 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 // Test that lifetime parameters must be constrained if they appear in
  12 // an associated type def'n. Issue #22077.
  13
  14 trait Fun {
  15     type Output;
  16     fn call<'x>(&'x self) -> Self::Output;
  17 }
  18
  19 struct Holder { x: String }
  20
  21 impl<'a> Fun for Holder { //~ ERROR E0207
  22     type Output = &'a str;
  23     fn call<'b>(&'b self) -> &'b str {
  24         &self.x[..]
  25     }
  26 }
  27
  28 fn main() { }