| // Copyright 2015 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. |
| |
| // Test that we are able to infer a suitable kind for this closure |
| // that is just called (`FnMut`). |
| |
| |
| fn main() { |
| let mut counter = 0; |
| |
| { |
| // Here this must be inferred to FnMut so that it can mutate counter: |
| let mut tick1 = || counter += 1; |
| |
| // In turn, tick2 must be inferred to FnMut so that it can call tick1: |
| let mut tick2 = || { tick1(); tick1(); }; |
| |
| tick2(); |
| } |
| |
| assert_eq!(counter, 2); |
| } |
