36 lines
873 B
Rust
36 lines
873 B
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use std::ops::FnMut;
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fn call_f<F:FnMut()>(mut f: F) {
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f();
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}
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fn f() {
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println!("hello");
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}
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fn call_g<G:FnMut(String,String) -> String>(mut g: G, x: String, y: String)
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-> String {
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g(x, y)
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}
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fn g(mut x: String, y: String) -> String {
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x.push_str(&y);
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x
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}
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fn main() {
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call_f(f);
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assert_eq!(call_g(g, "foo".to_string(), "bar".to_string()),
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"foobar");
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}
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