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Implement SpecOptionPartialEq for cmp::Ordering

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This commit is contained in:
Scott McMurray 2023-01-17 22:44:16 -08:00
parent e08b379d5d
commit 3122db7d03
2 changed files with 19 additions and 1 deletions
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10
library/core/src/option.rs
View File

@ -551,7 +551,7 @@ use crate::marker::Destruct;
use crate::panicking::{panic, panic_str};
use crate::pin::Pin;
use crate::{
convert, hint, mem,
cmp, convert, hint, mem,
ops::{self, ControlFlow, Deref, DerefMut},
};
@ -2146,6 +2146,14 @@ impl<T> SpecOptionPartialEq for crate::ptr::NonNull<T> {
}
}
#[stable(feature = "rust1", since = "1.0.0")]
impl SpecOptionPartialEq for cmp::Ordering {
#[inline]
fn eq(l: &Option<Self>, r: &Option<Self>) -> bool {
l.map_or(2, |x| x as i8) == r.map_or(2, |x| x as i8)
}
}
/////////////////////////////////////////////////////////////////////////////
// The Option Iterators
/////////////////////////////////////////////////////////////////////////////

10
tests/codegen/option-nonzero-eq.rs
View File

@ -3,6 +3,7 @@
#![crate_type = "lib"]
extern crate core;
use core::cmp::Ordering;
use core::num::{NonZeroU32, NonZeroI64};
use core::ptr::NonNull;
@ -32,3 +33,12 @@ pub fn non_null_eq(l: Option<NonNull<u8>>, r: Option<NonNull<u8>>) -> bool {
// CHECK-NEXT: ret i1
l == r
}
// CHECK-lABEL: @ordering_eq
#[no_mangle]
pub fn ordering_eq(l: Option<Ordering>, r: Option<Ordering>) -> bool {
// CHECK: start:
// CHECK-NEXT: icmp eq i8
// CHECK-NEXT: ret i1
l == r
}