| // Copyright 2012 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| trait vec_monad<A> { |
| fn bind<B>(&self, f: &fn(A) -> ~[B]); |
| } |
| |
| impl<A> vec_monad<A> for ~[A] { |
| fn bind<B>(&self, f: &fn(A) -> ~[B]) { |
| let mut r = fail!(); |
| for elt in self.iter() { r = r + f(*elt); } |
| //~^ WARNING unreachable expression |
| //~^^ ERROR the type of this value must be known |
| } |
| } |
| fn main() { |
| ["hi"].bind(|x| [x] ); |
| //~^ ERROR type `[&'static str, .. 1]` does not implement any method in scope named `bind` |
| } |
