rust-clippy/tests/ui/mut_reference.rs
Matthias Krüger 435299be30 rustfmt tests
2018-12-09 23:26:16 +01:00

52 lines
1.5 KiB
Rust

// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![allow(unused_variables, clippy::trivially_copy_pass_by_ref)]
fn takes_an_immutable_reference(a: &i32) {}
fn takes_a_mutable_reference(a: &mut i32) {}
struct MyStruct;
impl MyStruct {
fn takes_an_immutable_reference(&self, a: &i32) {}
fn takes_a_mutable_reference(&self, a: &mut i32) {}
}
#[warn(clippy::unnecessary_mut_passed)]
fn main() {
// Functions
takes_an_immutable_reference(&mut 42);
let as_ptr: fn(&i32) = takes_an_immutable_reference;
as_ptr(&mut 42);
// Methods
let my_struct = MyStruct;
my_struct.takes_an_immutable_reference(&mut 42);
// No error
// Functions
takes_an_immutable_reference(&42);
let as_ptr: fn(&i32) = takes_an_immutable_reference;
as_ptr(&42);
takes_a_mutable_reference(&mut 42);
let as_ptr: fn(&mut i32) = takes_a_mutable_reference;
as_ptr(&mut 42);
let a = &mut 42;
takes_an_immutable_reference(a);
// Methods
my_struct.takes_an_immutable_reference(&42);
my_struct.takes_a_mutable_reference(&mut 42);
my_struct.takes_an_immutable_reference(a);
}