src/test/compile-fail/object-does-not-impl-trait.rs

   1 // Copyright 2012 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 an object type `Box<Foo>` is not considered to implement the
  12 // trait `Foo`. Issue #5087.
  13
  14
  15 trait Foo {}
  16 fn take_foo<F:Foo>(f: F) {}
  17 fn take_object(f: Box<Foo>) { take_foo(f); }
  18 //~^ ERROR the trait `Foo` is not implemented
  19 fn main() {}