src/test/run-pass/issues/issue-13204.rs

   1 // Copyright 2012-2014 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 // run-pass
  12 #![allow(unused_mut)]
  13 // Test that when instantiating trait default methods, typeck handles
  14 // lifetime parameters defined on the method bound correctly.
  15
  16
  17 pub trait Foo {
  18     fn bar<'a, I: Iterator<Item=&'a ()>>(&self, it: I) -> usize {
  19         let mut xs = it.filter(|_| true);
  20         xs.count()
  21     }
  22 }
  23
  24 pub struct Baz;
  25
  26 impl Foo for Baz {
  27     // When instantiating `Foo::bar` for `Baz` here, typeck used to
  28     // ICE due to the lifetime parameter of `bar`.
  29 }
  30
  31 fn main() {
  32     let x = Baz;
  33     let y = vec![(), (), ()];
  34     assert_eq!(x.bar(y.iter()), 3);
  35 }