53 lines
1.5 KiB
Rust
53 lines
1.5 KiB
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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#![allow(unused_variables, clippy::trivially_copy_pass_by_ref)]
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fn takes_an_immutable_reference(a: &i32) {}
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fn takes_a_mutable_reference(a: &mut i32) {}
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struct MyStruct;
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impl MyStruct {
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fn takes_an_immutable_reference(&self, a: &i32) {}
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fn takes_a_mutable_reference(&self, a: &mut i32) {}
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}
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#[warn(clippy::unnecessary_mut_passed)]
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fn main() {
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// Functions
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takes_an_immutable_reference(&mut 42);
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let as_ptr: fn(&i32) = takes_an_immutable_reference;
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as_ptr(&mut 42);
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// Methods
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let my_struct = MyStruct;
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my_struct.takes_an_immutable_reference(&mut 42);
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// No error
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// Functions
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takes_an_immutable_reference(&42);
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let as_ptr: fn(&i32) = takes_an_immutable_reference;
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as_ptr(&42);
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takes_a_mutable_reference(&mut 42);
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let as_ptr: fn(&mut i32) = takes_a_mutable_reference;
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as_ptr(&mut 42);
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let a = &mut 42;
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takes_an_immutable_reference(a);
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// Methods
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my_struct.takes_an_immutable_reference(&42);
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my_struct.takes_a_mutable_reference(&mut 42);
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my_struct.takes_an_immutable_reference(a);
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}
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