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