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Derive additional traits for Infallible.

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This commit is contained in:
Jimmy Cuadra 2017-09-18 22:19:00 -07:00
parent 93a56cdacd
commit 5f6de3d402
1 changed files with 1 additions and 9 deletions
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10
src/libcore/convert.rs
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@ -48,8 +48,6 @@
#![stable(feature = "rust1", since = "1.0.0")]
use fmt;
/// A type used as the error type for implementations of fallible conversion
/// traits in cases where conversions cannot actually fail.
///
@ -57,15 +55,9 @@ use fmt;
/// It is used only to satisfy trait signatures that expect an error type, and
/// signals to both the compiler and the user that the error case is impossible.
#[unstable(feature = "try_from", issue = "33417")]
#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub enum Infallible {}
#[unstable(feature = "try_from", issue = "33417")]
impl fmt::Debug for Infallible {
fn fmt(&self, _: &mut fmt::Formatter) -> fmt::Result {
match *self {}
}
}
/// A cheap reference-to-reference conversion. Used to convert a value to a
/// reference value within generic code.
///