bjoernager/rust
bjoernager/rust
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Make panic's more specific

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This commit is contained in:
Kirill Podoprigora 2025-03-12 00:35:16 +02:00
parent 64d143326f
commit 7398b39a0b
1 changed files with 13 additions and 10 deletions
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23
compiler/rustc_index/src/slice.rs
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@ -1,6 +1,7 @@
use std::fmt; use std::fmt;
use std::marker::PhantomData; use std::marker::PhantomData;
use std::ops::{Index, IndexMut}; use std::ops::{Index, IndexMut};
use std::slice::GetDisjointMutError::*;
use std::slice::{self, SliceIndex}; use std::slice::{self, SliceIndex};
use crate::{Idx, IndexVec, IntoSliceIdx}; use crate::{Idx, IndexVec, IntoSliceIdx};
@ -115,33 +116,35 @@ impl<I: Idx, T> IndexSlice<I, T> {
/// Returns mutable references to two distinct elements, `a` and `b`. /// Returns mutable references to two distinct elements, `a` and `b`.
/// ///
/// Panics if `a == b`. /// Panics if `a == b` or if some of them are out of bounds.
#[inline] #[inline]
pub fn pick2_mut(&mut self, a: I, b: I) -> (&mut T, &mut T) { pub fn pick2_mut(&mut self, a: I, b: I) -> (&mut T, &mut T) {
let (ai, bi) = (a.index(), b.index()); let (ai, bi) = (a.index(), b.index());
assert!(ai != bi);
let len = self.raw.len();
assert!(ai < len && bi < len);
match self.raw.get_disjoint_mut([ai, bi]) { match self.raw.get_disjoint_mut([ai, bi]) {
Ok([a, b]) => (a, b), Ok([a, b]) => (a, b),
Err(_) => panic!("Can't get mutable references"), Err(OverlappingIndices) => panic!("Indices {ai:?} and {bi:?} are not disjoint!"),
Err(IndexOutOfBounds) => {
panic!("Some indices among ({ai:?}, {bi:?}) are out of bounds")
}
} }
} }
/// Returns mutable references to three distinct elements. /// Returns mutable references to three distinct elements.
/// ///
/// Panics if the elements are not distinct. /// Panics if the elements are not distinct or if some of them are out of bounds.
#[inline] #[inline]
pub fn pick3_mut(&mut self, a: I, b: I, c: I) -> (&mut T, &mut T, &mut T) { pub fn pick3_mut(&mut self, a: I, b: I, c: I) -> (&mut T, &mut T, &mut T) {
let (ai, bi, ci) = (a.index(), b.index(), c.index()); let (ai, bi, ci) = (a.index(), b.index(), c.index());
assert!(ai != bi && bi != ci && ci != ai);
let len = self.raw.len();
assert!(ai < len && bi < len && ci < len);
match self.raw.get_disjoint_mut([ai, bi, ci]) { match self.raw.get_disjoint_mut([ai, bi, ci]) {
Ok([a, b, c]) => (a, b, c), Ok([a, b, c]) => (a, b, c),
Err(_) => panic!("Can't get mutable references"), Err(OverlappingIndices) => {
panic!("Indices {ai:?}, {bi:?} and {ci:?} are not disjoint!")
}
Err(IndexOutOfBounds) => {
panic!("Some indices among ({ai:?}, {bi:?}, {ci:?}) are out of bounds")
}
} }
} }