1 // Copyright 2018 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.
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.
14 use std::collections::BinaryHeap;
17 let mut heap: BinaryHeap<i32> = BinaryHeap::new();
18 let borrow = heap.peek_mut();
22 println!("{:?}", heap); //~ ERROR cannot borrow `heap` as immutable