mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-22 14:55:26 +00:00
37 lines
928 B
Rust
37 lines
928 B
Rust
// Suggest not mutably borrowing a mutable reference
|
|
#![crate_type = "rlib"]
|
|
|
|
pub fn f(b: &mut i32) {
|
|
//~^ ERROR cannot borrow
|
|
//~| NOTE not mutable
|
|
//~| NOTE the binding is already a mutable borrow
|
|
h(&mut b);
|
|
//~^ NOTE cannot borrow as mutable
|
|
//~| HELP try removing `&mut` here
|
|
g(&mut &mut b);
|
|
//~^ NOTE cannot borrow as mutable
|
|
//~| HELP try removing `&mut` here
|
|
}
|
|
|
|
pub fn g(b: &mut i32) { //~ NOTE the binding is already a mutable borrow
|
|
h(&mut &mut b);
|
|
//~^ ERROR cannot borrow
|
|
//~| NOTE cannot borrow as mutable
|
|
//~| HELP try removing `&mut` here
|
|
}
|
|
|
|
pub fn h(_: &mut i32) {}
|
|
|
|
trait Foo {
|
|
fn bar(&mut self);
|
|
}
|
|
|
|
impl Foo for &mut String {
|
|
fn bar(&mut self) {}
|
|
}
|
|
|
|
pub fn baz(f: &mut String) { //~ HELP consider making the binding mutable
|
|
f.bar(); //~ ERROR cannot borrow `f` as mutable, as it is not declared as mutable
|
|
//~^ NOTE cannot borrow as mutable
|
|
}
|