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// Copyright 2014 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.
use std::ops::Range;
trait Itble<'r, T, I: Iterator<Item=T>> { fn iter(&'r self) -> I; }
impl<'r> Itble<'r, usize, Range<usize>> for (usize, usize) {
fn iter(&'r self) -> Range<usize> {
let &(min, max) = self;
min..max
}
}
fn check<'r, I: Iterator<Item=usize>, T: Itble<'r, usize, I>>(cont: &T) -> bool
//~^ HELP as shown: fn check<'r, I: Iterator<Item = usize>, T: Itble<'r, usize, I>>(cont: &'r T)
{
let cont_iter = cont.iter();
//~^ ERROR cannot infer an appropriate lifetime for autoref due to conflicting requirements
let result = cont_iter.fold(Some(0), |state, val| {
state.map_or(None, |mask| {
let bit = 1 << val;
if mask & bit == 0 {Some(mask|bit)} else {None}
})
});
result.is_some()
}
fn main() {
check((3, 5));
//~^ ERROR mismatched types
//~| expected `&_`
//~| found `(_, _)`
//~| expected &-ptr
//~| found tuple
}
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