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#![feature(box_patterns)]
fn a() {
let mut vec = [Box::new(1), Box::new(2), Box::new(3)];
match vec {
[box ref _a, _, _] => {
//~^ NOTE `vec[_]` is borrowed here
vec[0] = Box::new(4); //~ ERROR cannot assign
//~^ NOTE `vec[_]` is assigned to here
_a.use_ref();
//~^ NOTE borrow later used here
}
}
}
fn b() {
let mut vec = vec![Box::new(1), Box::new(2), Box::new(3)];
let vec: &mut [Box<isize>] = &mut vec;
match vec {
&mut [ref _b @ ..] => {
//~^ `vec[_]` is borrowed here
vec[0] = Box::new(4); //~ ERROR cannot assign
//~^ NOTE `vec[_]` is assigned to here
_b.use_ref();
//~^ NOTE borrow later used here
}
}
}
fn c() {
let mut vec = vec![Box::new(1), Box::new(2), Box::new(3)];
let vec: &mut [Box<isize>] = &mut vec;
match vec {
//~^ ERROR cannot move out
//~| NOTE cannot move out
&mut [_a,
//~^ NOTE data moved here
//~| NOTE move occurs because `_a` has type
//~| HELP consider removing the mutable borrow
..
] => {
}
_ => {}
}
let a = vec[0]; //~ ERROR cannot move out
//~| NOTE cannot move out of here
//~| NOTE move occurs because
//~| HELP consider borrowing here
//~| HELP consider cloning
}
fn d() {
let mut vec = vec![Box::new(1), Box::new(2), Box::new(3)];
let vec: &mut [Box<isize>] = &mut vec;
match vec {
//~^ ERROR cannot move out
//~| NOTE cannot move out
&mut [
//~^ HELP consider removing the mutable borrow
_b] => {}
//~^ NOTE data moved here
//~| NOTE move occurs because `_b` has type
_ => {}
}
let a = vec[0]; //~ ERROR cannot move out
//~| NOTE cannot move out of here
//~| NOTE move occurs because
//~| HELP consider borrowing here
//~| HELP consider cloning
}
fn e() {
let mut vec = vec![Box::new(1), Box::new(2), Box::new(3)];
let vec: &mut [Box<isize>] = &mut vec;
match vec {
//~^ ERROR cannot move out
//~| NOTE cannot move out
//~| NOTE move occurs because these variables have types
&mut [_a, _b, _c] => {}
//~^ NOTE data moved here
//~| NOTE and here
//~| NOTE and here
//~| HELP consider removing the mutable borrow
_ => {}
}
let a = vec[0]; //~ ERROR cannot move out
//~| NOTE cannot move out of here
//~| NOTE move occurs because
//~| HELP consider borrowing here
//~| HELP consider cloning
}
fn main() {}
trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { } }
impl<T> Fake for T { }
|
