38 lines
779 B
Rust
38 lines
779 B
Rust
// Check the if let guards don't force capture by value
|
|
//@ revisions: e2018 e2021
|
|
//@[e2018] edition:2018
|
|
//@[e2021] edition:2021
|
|
|
|
#![feature(if_let_guard)]
|
|
#![allow(irrefutable_let_patterns)]
|
|
|
|
fn if_let_ref_mut(mut value: Box<E>) {
|
|
let f = |x: &E| {
|
|
match &x {
|
|
E::Number(_) if let E::Number(ref mut n) = *value => { }
|
|
_ => {}
|
|
}
|
|
};
|
|
let x = value;
|
|
//~^ ERROR cannot move out of `value` because it is borrowed
|
|
drop(f);
|
|
}
|
|
|
|
fn if_let_move(value: Box<E>) {
|
|
let f = |x: &E| {
|
|
match &x {
|
|
E::Number(_) if let E::String(s) = *value => { }
|
|
_ => {}
|
|
}
|
|
};
|
|
let x = value;
|
|
//~^ ERROR use of moved value: `value`
|
|
}
|
|
|
|
enum E {
|
|
String(String),
|
|
Number(i32),
|
|
}
|
|
|
|
fn main() {}
|