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32 lines
820 B
Rust
32 lines
820 B
Rust
// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution.
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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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#![feature(tool_lints)]
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pub fn dec_read_dec(i: &mut i32) -> i32 {
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*i -= 1;
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let ret = *i;
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*i -= 1;
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ret
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}
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#[allow(clippy::trivially_copy_pass_by_ref)]
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pub fn minus_1(i: &i32) -> i32 {
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dec_read_dec(&mut i.clone())
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}
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fn main() {
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let mut i = 10;
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assert_eq!(minus_1(&i), 9);
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assert_eq!(i, 10);
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assert_eq!(dec_read_dec(&mut i), 9);
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assert_eq!(i, 8);
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}
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