619051e4f0
For noww, librustc_hir re-exports the `def_id` module from librustc_span, so the rest of rustc can continue to reference rustc_hir::def_id
79 lines
3.2 KiB
Rust
79 lines
3.2 KiB
Rust
use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
|
|
|
|
use crate::hir::{BodyId, Expr, ImplItemId, ItemId, Mod, TraitItemId, Ty, VisibilityKind};
|
|
use crate::hir_id::HirId;
|
|
|
|
/// Requirements for a `StableHashingContext` to be used in this crate.
|
|
/// This is a hack to allow using the `HashStable_Generic` derive macro
|
|
/// instead of implementing everything in librustc.
|
|
pub trait HashStableContext: syntax::HashStableContext + rustc_target::HashStableContext {
|
|
fn hash_hir_id(&mut self, _: HirId, hasher: &mut StableHasher);
|
|
fn hash_body_id(&mut self, _: BodyId, hasher: &mut StableHasher);
|
|
fn hash_reference_to_item(&mut self, _: HirId, hasher: &mut StableHasher);
|
|
fn hash_hir_mod(&mut self, _: &Mod<'_>, hasher: &mut StableHasher);
|
|
fn hash_hir_expr(&mut self, _: &Expr<'_>, hasher: &mut StableHasher);
|
|
fn hash_hir_ty(&mut self, _: &Ty<'_>, hasher: &mut StableHasher);
|
|
fn hash_hir_visibility_kind(&mut self, _: &VisibilityKind<'_>, hasher: &mut StableHasher);
|
|
}
|
|
|
|
impl<HirCtx: crate::HashStableContext> HashStable<HirCtx> for HirId {
|
|
fn hash_stable(&self, hcx: &mut HirCtx, hasher: &mut StableHasher) {
|
|
hcx.hash_hir_id(*self, hasher)
|
|
}
|
|
}
|
|
|
|
impl<HirCtx: crate::HashStableContext> HashStable<HirCtx> for BodyId {
|
|
fn hash_stable(&self, hcx: &mut HirCtx, hasher: &mut StableHasher) {
|
|
hcx.hash_body_id(*self, hasher)
|
|
}
|
|
}
|
|
|
|
// The following implementations of HashStable for `ItemId`, `TraitItemId`, and
|
|
// `ImplItemId` deserve special attention. Normally we do not hash `NodeId`s within
|
|
// the HIR, since they just signify a HIR nodes own path. But `ItemId` et al
|
|
// are used when another item in the HIR is *referenced* and we certainly
|
|
// want to pick up on a reference changing its target, so we hash the NodeIds
|
|
// in "DefPath Mode".
|
|
|
|
impl<HirCtx: crate::HashStableContext> HashStable<HirCtx> for ItemId {
|
|
fn hash_stable(&self, hcx: &mut HirCtx, hasher: &mut StableHasher) {
|
|
hcx.hash_reference_to_item(self.id, hasher)
|
|
}
|
|
}
|
|
|
|
impl<HirCtx: crate::HashStableContext> HashStable<HirCtx> for ImplItemId {
|
|
fn hash_stable(&self, hcx: &mut HirCtx, hasher: &mut StableHasher) {
|
|
hcx.hash_reference_to_item(self.hir_id, hasher)
|
|
}
|
|
}
|
|
|
|
impl<HirCtx: crate::HashStableContext> HashStable<HirCtx> for TraitItemId {
|
|
fn hash_stable(&self, hcx: &mut HirCtx, hasher: &mut StableHasher) {
|
|
hcx.hash_reference_to_item(self.hir_id, hasher)
|
|
}
|
|
}
|
|
|
|
impl<HirCtx: crate::HashStableContext> HashStable<HirCtx> for Mod<'_> {
|
|
fn hash_stable(&self, hcx: &mut HirCtx, hasher: &mut StableHasher) {
|
|
hcx.hash_hir_mod(self, hasher)
|
|
}
|
|
}
|
|
|
|
impl<HirCtx: crate::HashStableContext> HashStable<HirCtx> for Expr<'_> {
|
|
fn hash_stable(&self, hcx: &mut HirCtx, hasher: &mut StableHasher) {
|
|
hcx.hash_hir_expr(self, hasher)
|
|
}
|
|
}
|
|
|
|
impl<HirCtx: crate::HashStableContext> HashStable<HirCtx> for Ty<'_> {
|
|
fn hash_stable(&self, hcx: &mut HirCtx, hasher: &mut StableHasher) {
|
|
hcx.hash_hir_ty(self, hasher)
|
|
}
|
|
}
|
|
|
|
impl<HirCtx: crate::HashStableContext> HashStable<HirCtx> for VisibilityKind<'_> {
|
|
fn hash_stable(&self, hcx: &mut HirCtx, hasher: &mut StableHasher) {
|
|
hcx.hash_hir_visibility_kind(self, hasher)
|
|
}
|
|
}
|