| // Copyright 2018 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. |
| |
| #![allow(warnings)] |
| #![feature(nll)] |
| |
| use std::collections::BinaryHeap; |
| |
| fn main() { |
| let mut heap: BinaryHeap<i32> = BinaryHeap::new(); |
| let borrow = heap.peek_mut(); |
| |
| match (borrow, ()) { |
| (Some(_), ()) => { |
| println!("{:?}", heap); //~ ERROR cannot borrow `heap` as immutable |
| } |
| _ => {} |
| }; |
| } |
