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Fixed type signature of uninhabited method. #6442

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Fixed type signature of uninhabited method. #6442

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15 changes: 12 additions & 3 deletions src/libcore/util.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -138,8 +138,8 @@ pub enum Void { }

pub impl Void {
/// A utility function for ignoring this uninhabited type
fn uninhabited(&self) -> ! {
match *self {
fn uninhabited(self) -> ! {
match self {
// Nothing to match on
}
}
Expand Down Expand Up @@ -177,7 +177,8 @@ pub fn unreachable() -> ! {
#[cfg(test)]
mod tests {
use option::{None, Some};
use util::{NonCopyable, id, replace, swap};
use util::{Void, NonCopyable, id, replace, swap};
use either::{Either, Left, Right};

#[test]
pub fn identity_crisis() {
Expand All @@ -202,4 +203,12 @@ mod tests {
assert!(x.is_none());
assert!(y.is_some());
}
#[test]
pub fn test_uninhabited() {
let could_only_be_coin : Either <Void, ()> = Right (());
match could_only_be_coin {
Right (coin) => coin,
Left (is_void) => is_void.uninhabited ()
}
}
}