pub struct HirId {
pub owner: OwnerId,
pub local_id: ItemLocalId,
}
Expand description
Uniquely identifies a node in the HIR of the current crate. It is
composed of the owner
, which is the LocalDefId
of the directly enclosing
hir::Item
, hir::TraitItem
, or hir::ImplItem
(i.e., the closest “item-like”),
and the local_id
which is unique within the given owner.
This two-level structure makes for more stable values: One can move an item
around within the source code, or add or remove stuff before it, without
the local_id
part of the HirId
changing, which is a very useful property in
incremental compilation where we have to persist things through changes to
the code base.
Fields§
§owner: OwnerId
§local_id: ItemLocalId
Implementations§
Trait Implementations§
source§impl<__CTX> HashStable<__CTX> for HirIdwhere
__CTX: HashStableContext,
impl<__CTX> HashStable<__CTX> for HirIdwhere __CTX: HashStableContext,
fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)
source§impl Ord for HirId
impl Ord for HirId
source§impl PartialEq<HirId> for HirId
impl PartialEq<HirId> for HirId
source§impl PartialOrd<HirId> for HirId
impl PartialOrd<HirId> for HirId
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moresource§impl<HirCtx: HashStableContext> ToStableHashKey<HirCtx> for HirId
impl<HirCtx: HashStableContext> ToStableHashKey<HirCtx> for HirId
type KeyType = (DefPathHash, ItemLocalId)
fn to_stable_hash_key(&self, hcx: &HirCtx) -> (DefPathHash, ItemLocalId)
impl Copy for HirId
impl Eq for HirId
impl StructuralEq for HirId
impl StructuralPartialEq for HirId
Auto Trait Implementations§
impl RefUnwindSafe for HirId
impl Send for HirId
impl Sync for HirId
impl Unpin for HirId
impl UnwindSafe for HirId
Blanket Implementations§
source§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere T: Copy,
fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T
fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T> ) -> &'a mut [T]
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Layout§
Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...)
attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.
Size: 8 bytes