1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
// This test checks that the lint `if_let_rescope` only actions
// when Edition 2021 or prior is targeted here because the lint should work especially
// when edition migration towards 2024 is executed.
//@ revisions: edition2021 edition2024
//@ [edition2021] edition: 2021
//@ [edition2024] edition: 2024
//@ [edition2024] check-pass
#![deny(if_let_rescope)]
#![allow(irrefutable_let_patterns)]
struct Droppy;
impl Drop for Droppy {
fn drop(&mut self) {
println!("dropped");
}
}
impl Droppy {
fn get(&self) -> Option<u8> {
None
}
}
fn main() {
if let Some(_value) = Droppy.get() {
//[edition2021]~^ ERROR: `if let` assigns a shorter lifetime since Edition 2024
//[edition2021]~| HELP: a `match` with a single arm can preserve the drop order up to Edition 2021
//[edition2021]~| WARN: this changes meaning in Rust 2024
} else {
//[edition2021]~^ HELP: the value is now dropped here in Edition 2024
}
}
|
