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Make some Ordering methods const

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Constify the following methods of `core::cmp::Ordering`:
 - `reverse`
 - `then`

Possible because of #49146 (Allow `if` and `match` in constants).
This commit is contained in:
CDirkx 2020-08-12 22:10:32 +02:00
parent 3df25ae186
commit 6b0d44e92a
1 changed files with 2 additions and 2 deletions
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4
library/core/src/cmp.rs
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@ -357,7 +357,7 @@ impl Ordering {
#[inline]
#[must_use]
#[stable(feature = "rust1", since = "1.0.0")]
pub fn reverse(self) -> Ordering {
pub const fn reverse(self) -> Ordering {
match self {
Less => Greater,
Equal => Equal,
@ -395,7 +395,7 @@ impl Ordering {
#[inline]
#[must_use]
#[stable(feature = "ordering_chaining", since = "1.17.0")]
pub fn then(self, other: Ordering) -> Ordering {
pub const fn then(self, other: Ordering) -> Ordering {
match self {
Equal => other,
_ => self,