blob: 4b8f9f536413693ddbf362b0f1ae503f234c3a7d (
plain)
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
|
// 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,
}
}
}
|
