34 lines
740 B
Rust
34 lines
740 B
Rust
|
// Regression test for the ICE described in #87046.
|
||
|
|
|
||
|
|
#![crate_type="lib"]
|
||
|
|
#![allow(unreachable_patterns)]
|
||
|
|
|
||
|
|
#[derive(PartialEq, Eq)]
|
||
|
|
#[repr(transparent)]
|
||
|
|
pub struct Username(str);
|
||
|
|
|
||
|
|
pub const ROOT_USER: &Username = Username::from_str("root");
|
||
|
|
|
||
|
|
impl Username {
|
||
|
|
pub const fn from_str(raw: &str) -> &Self {
|
||
|
|
union Transmute<'a> {
|
||
|
|
raw: &'a str,
|
||
|
|
typed: &'a Username,
|
||
|
|
}
|
||
|
|
|
||
|
|
unsafe { Transmute { raw }.typed }
|
||
|
|
}
|
||
|
|
|
||
|
|
pub const fn as_str(&self) -> &str {
|
||
|
|
&self.0
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn is_root(&self) -> bool {
|
||
|
|
match self {
|
||
|
|
ROOT_USER => true,
|
||
|
|
//~^ ERROR: cannot use unsized non-slice type `Username` in constant patterns
|
||
|
|
_ => false,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|