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Implement StableHash for BitSet and BitMatrix via Hash

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This fixes an issue where bit sets / bit matrices the same word
content but a different domain size would receive the same hash.
This commit is contained in:
Tomasz Miąsko
2021-12-18 00:00:00 +00:00
parent d496cca3b1
commit d0281bcb25
2 changed files with 31 additions and 4 deletions
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8
compiler/rustc_data_structures/src/stable_hasher.rs
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@@ -476,14 +476,14 @@ where
}
impl<I: vec::Idx, CTX> HashStable<CTX> for bit_set::BitSet<I> {
fn hash_stable(&self, ctx: &mut CTX, hasher: &mut StableHasher) {
self.words().hash_stable(ctx, hasher);
fn hash_stable(&self, _ctx: &mut CTX, hasher: &mut StableHasher) {
::std::hash::Hash::hash(self, hasher);
}
}
impl<R: vec::Idx, C: vec::Idx, CTX> HashStable<CTX> for bit_set::BitMatrix<R, C> {
fn hash_stable(&self, ctx: &mut CTX, hasher: &mut StableHasher) {
self.words().hash_stable(ctx, hasher);
fn hash_stable(&self, _ctx: &mut CTX, hasher: &mut StableHasher) {
::std::hash::Hash::hash(self, hasher);
}
}