src/test/run-pass/borrowck-trait-lifetime.rs

   1 // Copyright 2014 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 // This test verifies that casting from the same lifetime on a value
  12 // to the same lifetime on a trait succeeds. See issue #10766.
  13
  14 #![allow(dead_code)]
  15
  16 use std::marker;
  17
  18 fn main() {
  19     trait T { fn foo(&self) {} }
  20
  21     fn f<'a, V: T>(v: &'a V) -> &'a T {
  22         v as &'a T
  23     }
  24 }