22 lines
671 B
Rust
22 lines
671 B
Rust
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// Copyright 2017 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::fmt::Display;
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fn foo(f: impl Display + Clone) -> String {
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let g = f.clone();
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format!("{} + {}", f, g)
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}
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fn main() {
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let sum = foo(format!("22"));
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assert_eq!(sum, r"22 + 22");
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}
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