src/test/run-pass/trait-coercion-generic.rs

   1 // Copyright 2013 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 trait Trait<T> {
  12     fn f(&self, x: T);
  13 }
  14
  15 #[derive(Copy, Clone)]
  16 struct Struct {
  17     x: isize,
  18     y: isize,
  19 }
  20
  21 impl Trait<&'static str> for Struct {
  22     fn f(&self, x: &'static str) {
  23         println!("Hi, {}!", x);
  24     }
  25 }
  26
  27 pub fn main() {
  28     let a = Struct { x: 1, y: 2 };
  29     let b: Box<Trait<&'static str>> = Box::new(a);
  30     b.f("Mary");
  31     let c: &Trait<&'static str> = &a;
  32     c.f("Joe");
  33 }