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ardi 2024-01-10 11:17:46 +01:00
parent 281ceb2bd2
commit 1bf3aee381
1 changed files with 3 additions and 15 deletions
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18
compiler/rustc_index/src/vec.rs
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@ -17,27 +17,15 @@ use crate::{Idx, IndexSlice};
/// While it's possible to use `u32` or `usize` directly for `I`, /// While it's possible to use `u32` or `usize` directly for `I`,
/// you almost certainly want to use a [`newtype_index!`]-generated type instead. /// you almost certainly want to use a [`newtype_index!`]-generated type instead.
/// ///
/// This allows to index the IndexVec with the new index type: /// This allows to index the IndexVec with the new index type
/// ///
/// ```
/// use crate as rustc_index;
/// use rustc_index::{IndexVec, newtype_index};
///
/// newtype_index! {
/// pub struct MyIdx {}
/// }
///
/// let my_index_vec: IndexVec<MyIdx, u32> = IndexVec::from_raw(vec![0,1,2,3]);
/// let idx: MyIdx = MyIdx::from_u32(2);
/// assert_eq!(my_index_vec[idx], 2);
/// ```
/// ///
/// [`newtype_index!`]: ../macro.newtype_index.html /// [`newtype_index!`]: ../macro.newtype_index.html
#[derive(Clone, PartialEq, Eq, Hash)] #[derive(Clone, PartialEq, Eq, Hash)]
#[repr(transparent)] #[repr(transparent)]
pub struct IndexVec<I: Idx, T> { pub struct IndexVec<I: Idx, T> {
pub raw: Vec<T>, pub raw: Vec<T>,
_marker: PhantomData<fn(&I)>, _marker: PhantomData<I>,
} }
impl<I: Idx, T> IndexVec<I, T> { impl<I: Idx, T> IndexVec<I, T> {
@ -77,7 +65,7 @@ impl<I: Idx, T> IndexVec<I, T> {
IndexVec::from_raw(vec![elem; universe.len()]) IndexVec::from_raw(vec![elem; universe.len()])
} }
/// Creates a new `IndexVec` with n copies of `elem` /// Creates a new IndexVec
#[inline] #[inline]
pub fn from_elem_n(elem: T, n: usize) -> Self pub fn from_elem_n(elem: T, n: usize) -> Self
where where