rust/tests/ui/nll/issue-27282-move-ref-mut-into-guard.rs
2023-01-11 09:32:08 +00:00

24 lines
762 B
Rust

// Issue 27282: Example 1: This sidesteps the AST checks disallowing
// mutable borrows in match guards by hiding the mutable borrow in a
// guard behind a move (of the ref mut pattern id) within a closure.
#![feature(if_let_guard)]
fn main() {
match Some(&4) {
None => {},
ref mut foo
if { (|| { let bar = foo; bar.take() })(); false } => {},
//~^ ERROR cannot move out of `foo` in pattern guard [E0507]
Some(s) => std::process::exit(*s),
}
match Some(&4) {
None => {},
ref mut foo
if let Some(()) = { (|| { let bar = foo; bar.take() })(); None } => {},
//~^ ERROR cannot move out of `foo` in pattern guard [E0507]
Some(s) => std::process::exit(*s),
}
}