src/test/ui/issues/issue-13058.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 use std::ops::Range;
  12
  13 trait Itble<'r, T, I: Iterator<Item=T>> { fn iter(&'r self) -> I; }
  14
  15 impl<'r> Itble<'r, usize, Range<usize>> for (usize, usize) {
  16     fn iter(&'r self) -> Range<usize> {
  17         let &(min, max) = self;
  18         min..max
  19     }
  20 }
  21
  22 fn check<'r, I: Iterator<Item=usize>, T: Itble<'r, usize, I>>(cont: &T) -> bool
  23 {
  24     let cont_iter = cont.iter();
  25 //~^ ERROR 24:26: 24:30: explicit lifetime required in the type of `cont` [E0621]
  26     let result = cont_iter.fold(Some(0), |state, val| {
  27         state.map_or(None, |mask| {
  28             let bit = 1 << val;
  29             if mask & bit == 0 {Some(mask|bit)} else {None}
  30         })
  31     });
  32     result.is_some()
  33 }
  34
  35 fn main() {
  36     check(&(3, 5));
  37 }