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