rust/tests/ui/closures/2229_closure_analysis/match/if-let-guards.rs
Matthew Jasper d4ffb3b08a Capture scrutinee of if let guards correctly
Previously we were always capturing by value.
2023-09-22 13:04:44 +00:00

56 lines
1021 B
Rust

// Check the if let guards don't force capture by value
// revisions: e2018 e2021
// check-pass
//[e2018] edition:2018
//[e2021] edition:2021
#![feature(if_let_guard)]
#![allow(irrefutable_let_patterns)]
fn if_let_underscore(value: Box<E>) {
|x: &E| {
match &x {
E::Number(_) if let _ = *value => { }
_ => {}
}
};
let x = value;
}
fn if_let_copy(value: Box<E>) {
|x: &E| {
match &x {
E::Number(_) if let E::Number(n) = *value => { }
_ => {}
}
};
let x = value;
}
fn if_let_ref(value: Box<E>) {
|x: &E| {
match &x {
E::Number(_) if let E::Number(ref n) = *value => { }
_ => {}
}
};
let x = value;
}
fn if_let_ref_mut(mut value: Box<E>) {
|x: &E| {
match &x {
E::Number(_) if let E::Number(ref mut n) = *value => { }
_ => {}
}
};
let x = value;
}
enum E {
String(String),
Number(i32),
}
fn main() {}