nordic-dev.net/rust
nordic-dev.net/rust
2
0
Fork 0
mirror of https://github.com/rust-lang/rust.git synced 2024-11-23 07:14:28 +00:00
Code Issues Packages Projects Releases Wiki Activity

Use unchecked_sub in split_at

Browse Source
This commit is contained in:
Scott McMurray 2024-05-04 00:54:21 -07:00
parent fcc06c894b
commit f1de4c16ee
1 changed files with 8 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
library/core/src/slice/mod.rs
View File

@ -9,7 +9,7 @@
use crate::cmp::Ordering::{self, Equal, Greater, Less}; use crate::cmp::Ordering::{self, Equal, Greater, Less};
use crate::fmt; use crate::fmt;
use crate::hint; use crate::hint;
use crate::intrinsics::exact_div; use crate::intrinsics::{exact_div, unchecked_sub};
use crate::mem::{self, SizedTypeProperties}; use crate::mem::{self, SizedTypeProperties};
use crate::num::NonZero; use crate::num::NonZero;
use crate::ops::{Bound, OneSidedRange, Range, RangeBounds}; use crate::ops::{Bound, OneSidedRange, Range, RangeBounds};
@ -1983,7 +1983,7 @@ impl<T> [T] {
); );
// SAFETY: Caller has to check that `0 <= mid <= self.len()` // SAFETY: Caller has to check that `0 <= mid <= self.len()`
unsafe { (from_raw_parts(ptr, mid), from_raw_parts(ptr.add(mid), len - mid)) } unsafe { (from_raw_parts(ptr, mid), from_raw_parts(ptr.add(mid), unchecked_sub(len, mid))) }
} }
/// Divides one mutable slice into two at an index, without doing bounds checking. /// Divides one mutable slice into two at an index, without doing bounds checking.
@ -2035,7 +2035,12 @@ impl<T> [T] {
// //
// `[ptr; mid]` and `[mid; len]` are not overlapping, so returning a mutable reference // `[ptr; mid]` and `[mid; len]` are not overlapping, so returning a mutable reference
// is fine. // is fine.
unsafe { (from_raw_parts_mut(ptr, mid), from_raw_parts_mut(ptr.add(mid), len - mid)) } unsafe {
(
from_raw_parts_mut(ptr, mid),
from_raw_parts_mut(ptr.add(mid), unchecked_sub(len, mid)),
)
}
} }
/// Divides one slice into two at an index, returning `None` if the slice is /// Divides one slice into two at an index, returning `None` if the slice is