rust/tests/ui/mut_reference.rs
2019-01-08 21:46:39 +01:00

44 lines
1.1 KiB
Rust

#![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);
}