src/test/compile-fail/issue-26262.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 // Check that projections don't count as constraining type parameters.
  12
  13 struct S<T>(T);
  14
  15 trait Tr { type Assoc; fn test(); }
  16
  17 impl<T: Tr> S<T::Assoc> {
  18 //~^ ERROR the type parameter `T` is not constrained
  19     fn foo(self, _: T) {
  20         T::test();
  21     }
  22 }
  23
  24 trait Trait1<T> { type Bar; }
  25 trait Trait2<'x> { type Foo; }
  26
  27 impl<'a,T: Trait2<'a>> Trait1<<T as Trait2<'a>>::Foo> for T {
  28 //~^ ERROR the lifetime parameter `'a` is not constrained
  29     type Bar = &'a ();
  30 }
  31
  32 fn main() {}