mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 23:34:48 +00:00
26 lines
441 B
Rust
26 lines
441 B
Rust
//@ run-pass
|
|
#![allow(non_camel_case_types)]
|
|
|
|
use std::cell::Cell;
|
|
|
|
#[derive(Copy, Clone)]
|
|
enum newtype {
|
|
newvar(isize)
|
|
}
|
|
|
|
pub fn main() {
|
|
|
|
// Test that borrowck treats enums with a single variant
|
|
// specially.
|
|
|
|
let x = &Cell::new(5);
|
|
let y = &Cell::new(newtype::newvar(3));
|
|
let z = match y.get() {
|
|
newtype::newvar(b) => {
|
|
x.set(x.get() + 1);
|
|
x.get() * b
|
|
}
|
|
};
|
|
assert_eq!(z, 18);
|
|
}
|