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Make sure that the hash of referenced specialize types is the same #213

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merged 1 commit into from
Mar 1, 2024
Merged

Make sure that the hash of referenced specialize types is the same #213

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19 changes: 19 additions & 0 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -393,4 +393,23 @@ mod test {
fn test_ahasher_construction() {
let _ = AHasher::new_with_keys(1234, 5678);
}

#[test]
fn test_specialize_reference_hash() {
let hasher_build = RandomState::with_seeds(0, 0, 0, 0);
let h1 = hasher_build.hash_one(1u64);
let h2 = hasher_build.hash_one(&1u64);

assert_eq!(h1, h2);

let h1 = u64::get_hash(&1_u64, &hasher_build);
let h2 = <&u64>::get_hash(&&1_u64, &hasher_build);

assert_eq!(h1, h2);

let h1 = hasher_build.hash_one(1u128);
let h2 = hasher_build.hash_one(&1u128);

assert_eq!(h1, h2);
}
}
75 changes: 36 additions & 39 deletions src/specialize.rs
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Expand Up @@ -47,7 +47,7 @@ where
}
}

macro_rules! call_hasher_impl {
macro_rules! call_hasher_impl_u64 {
($typ:ty) => {
#[cfg(feature = "specialize")]
impl CallHasher for $typ {
Expand All @@ -58,46 +58,43 @@ macro_rules! call_hasher_impl {
}
};
}
call_hasher_impl!(u8);
call_hasher_impl!(u16);
call_hasher_impl!(u32);
call_hasher_impl!(u64);
call_hasher_impl!(i8);
call_hasher_impl!(i16);
call_hasher_impl!(i32);
call_hasher_impl!(i64);

#[cfg(feature = "specialize")]
impl CallHasher for u128 {
#[inline]
fn get_hash<H: Hash + ?Sized, B: BuildHasher>(value: &H, build_hasher: &B) -> u64 {
build_hasher.hash_as_fixed_length(value)
}
}

#[cfg(feature = "specialize")]
impl CallHasher for i128 {
#[inline]
fn get_hash<H: Hash + ?Sized, B: BuildHasher>(value: &H, build_hasher: &B) -> u64 {
build_hasher.hash_as_fixed_length(value)
}
}

#[cfg(feature = "specialize")]
impl CallHasher for usize {
#[inline]
fn get_hash<H: Hash + ?Sized, B: BuildHasher>(value: &H, build_hasher: &B) -> u64 {
build_hasher.hash_as_fixed_length(value)
}
call_hasher_impl_u64!(u8);
call_hasher_impl_u64!(u16);
call_hasher_impl_u64!(u32);
call_hasher_impl_u64!(u64);
call_hasher_impl_u64!(i8);
call_hasher_impl_u64!(i16);
call_hasher_impl_u64!(i32);
call_hasher_impl_u64!(i64);
call_hasher_impl_u64!(&u8);
call_hasher_impl_u64!(&u16);
call_hasher_impl_u64!(&u32);
call_hasher_impl_u64!(&u64);
call_hasher_impl_u64!(&i8);
call_hasher_impl_u64!(&i16);
call_hasher_impl_u64!(&i32);
call_hasher_impl_u64!(&i64);

macro_rules! call_hasher_impl_fixed_length{
($typ:ty) => {
#[cfg(feature = "specialize")]
impl CallHasher for $typ {
#[inline]
fn get_hash<H: Hash + ?Sized, B: BuildHasher>(value: &H, build_hasher: &B) -> u64 {
build_hasher.hash_as_fixed_length(value)
}
}
};
}

#[cfg(feature = "specialize")]
impl CallHasher for isize {
#[inline]
fn get_hash<H: Hash + ?Sized, B: BuildHasher>(value: &H, build_hasher: &B) -> u64 {
build_hasher.hash_as_fixed_length(value)
}
}
call_hasher_impl_fixed_length!(u128);
call_hasher_impl_fixed_length!(i128);
call_hasher_impl_fixed_length!(usize);
call_hasher_impl_fixed_length!(isize);
call_hasher_impl_fixed_length!(&u128);
call_hasher_impl_fixed_length!(&i128);
call_hasher_impl_fixed_length!(&usize);
call_hasher_impl_fixed_length!(&isize);

#[cfg(feature = "specialize")]
impl CallHasher for [u8] {
Expand Down