Trait std::hash::Hash 1.0.0[−][src]
A hashable type.
Types implementing Hash are able to be hashed with an instance of
Hasher.
Implementing Hash
You can derive Hash with #[derive(Hash)] if all fields implement Hash.
The resulting hash will be the combination of the values from calling
hash on each field.
#[derive(Hash)] struct Rustacean { name: String, country: String, }Run
If you need more control over how a value is hashed, you can of course
implement the Hash trait yourself:
use std::hash::{Hash, Hasher}; struct Person { id: u32, name: String, phone: u64, } impl Hash for Person { fn hash<H: Hasher>(&self, state: &mut H) { self.id.hash(state); self.phone.hash(state); } }Run
Hash and Eq
When implementing both Hash and Eq, it is important that the following
property holds:
k1 == k2 -> hash(k1) == hash(k2)
In other words, if two keys are equal, their hashes must also be equal.
HashMap and HashSet both rely on this behavior.
Thankfully, you won’t need to worry about upholding this property when
deriving both Eq and Hash with #[derive(PartialEq, Eq, Hash)].
Required methods
Loading content...Provided methods
pub fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher, 1.3.0[src]
H: Hasher,
Implementors
impl Hash for std::cmp::Ordering[src]
impl Hash for Infallible1.44.0[src]
impl Hash for ErrorKind[src]
impl Hash for IpAddr1.7.0[src]
impl Hash for Ipv6MulticastScope[src]
impl Hash for SocketAddr[src]
impl Hash for std::sync::atomic::Ordering[src]
impl Hash for bool[src]
impl Hash for char[src]
impl Hash for i8[src]
pub fn hash<H>(&self, state: &mut H) where
H: Hasher, [src]
H: Hasher,
pub fn hash_slice<H>(data: &[i8], state: &mut H) where
H: Hasher, [src]
H: Hasher,
impl Hash for i16[src]
pub fn hash<H>(&self, state: &mut H) where
H: Hasher, [src]
H: Hasher,
pub fn hash_slice<H>(data: &[i16], state: &mut H) where
H: Hasher, [src]
H: Hasher,
impl Hash for i32[src]
pub fn hash<H>(&self, state: &mut H) where
H: Hasher, [src]
H: Hasher,
pub fn hash_slice<H>(data: &[i32], state: &mut H) where
H: Hasher, [src]
H: Hasher,
impl Hash for i64[src]
pub fn hash<H>(&self, state: &mut H) where
H: Hasher, [src]
H: Hasher,
pub fn hash_slice<H>(data: &[i64], state: &mut H) where
H: Hasher, [src]
H: Hasher,
impl Hash for i128[src]
pub fn hash<H>(&self, state: &mut H) where
H: Hasher, [src]
H: Hasher,
pub fn hash_slice<H>(data: &[i128], state: &mut H) where
H: Hasher, [src]
H: Hasher,
impl Hash for isize[src]
pub fn hash<H>(&self, state: &mut H) where
H: Hasher, [src]
H: Hasher,
pub fn hash_slice<H>(data: &[isize], state: &mut H) where
H: Hasher, [src]
H: Hasher,
impl Hash for !1.29.0[src]
impl Hash for str[src]
impl Hash for u8[src]
pub fn hash<H>(&self, state: &mut H) where
H: Hasher, [src]
H: Hasher,
pub fn hash_slice<H>(data: &[u8], state: &mut H) where
H: Hasher, [src]
H: Hasher,
impl Hash for u16[src]
pub fn hash<H>(&self, state: &mut H) where
H: Hasher, [src]
H: Hasher,
pub fn hash_slice<H>(data: &[u16], state: &mut H) where
H: Hasher, [src]
H: Hasher,
impl Hash for u32[src]
pub fn hash<H>(&self, state: &mut H) where
H: Hasher, [src]
H: Hasher,
pub fn hash_slice<H>(data: &[u32], state: &mut H) where
H: Hasher, [src]
H: Hasher,
impl Hash for u64[src]
pub fn hash<H>(&self, state: &mut H) where
H: Hasher, [src]
H: Hasher,
pub fn hash_slice<H>(data: &[u64], state: &mut H) where
H: Hasher, [src]
H: Hasher,
impl Hash for u128[src]
pub fn hash<H>(&self, state: &mut H) where
H: Hasher, [src]
H: Hasher,
pub fn hash_slice<H>(data: &[u128], state: &mut H) where
H: Hasher, [src]
H: Hasher,
impl Hash for ()[src]
impl Hash for usize[src]
pub fn hash<H>(&self, state: &mut H) where
H: Hasher, [src]
H: Hasher,
pub fn hash_slice<H>(data: &[usize], state: &mut H) where
H: Hasher, [src]
H: Hasher,
impl Hash for TypeId[src]
impl Hash for CStr[src]
impl Hash for CString[src]
impl Hash for OsStr[src]
impl Hash for OsString[src]
impl Hash for Error[src]
impl Hash for FileType1.1.0[src]
impl Hash for PhantomPinned1.33.0[src]
impl Hash for Ipv4Addr[src]
impl Hash for Ipv6Addr[src]
impl Hash for SocketAddrV4[src]
impl Hash for SocketAddrV6[src]
impl Hash for NonZeroI81.34.0[src]
impl Hash for NonZeroI161.34.0[src]
impl Hash for NonZeroI321.34.0[src]
impl Hash for NonZeroI641.34.0[src]
impl Hash for NonZeroI1281.34.0[src]
impl Hash for NonZeroIsize1.34.0[src]
impl Hash for NonZeroU81.28.0[src]
impl Hash for NonZeroU161.28.0[src]
impl Hash for NonZeroU321.28.0[src]
impl Hash for NonZeroU641.28.0[src]
impl Hash for NonZeroU1281.28.0[src]
impl Hash for NonZeroUsize1.28.0[src]
impl Hash for RangeFull[src]
impl Hash for NoneError[src]
impl Hash for Path[src]
impl Hash for PathBuf[src]
impl Hash for PrefixComponent<'_>[src]
impl Hash for String[src]
impl Hash for ThreadId1.19.0[src]
impl Hash for Duration1.3.0[src]
impl Hash for Instant1.8.0[src]
impl Hash for SystemTime1.8.0[src]
impl<'_, B> Hash for Cow<'_, B> where
B: Hash + ToOwned + ?Sized, [src]
B: Hash + ToOwned + ?Sized,
impl<'_, T> Hash for &'_ T where
T: Hash + ?Sized, [src]
T: Hash + ?Sized,
impl<'_, T> Hash for &'_ mut T where
T: Hash + ?Sized, [src]
T: Hash + ?Sized,
impl<'a> Hash for Component<'a>[src]
impl<'a> Hash for Prefix<'a>[src]
impl<'a> Hash for Location<'a>1.10.0[src]
impl<A> Hash for (A,) where
A: Hash + ?Sized, [src]
A: Hash + ?Sized,
impl<A> Hash for VecDeque<A> where
A: Hash, [src]
A: Hash,
impl<A, B> Hash for (A, B) where
B: Hash + ?Sized,
A: Hash, [src]
B: Hash + ?Sized,
A: Hash,
impl<A, B, C> Hash for (A, B, C) where
C: Hash + ?Sized,
B: Hash,
A: Hash, [src]
C: Hash + ?Sized,
B: Hash,
A: Hash,
impl<A, B, C, D> Hash for (A, B, C, D) where
C: Hash,
B: Hash,
A: Hash,
D: Hash + ?Sized, [src]
C: Hash,
B: Hash,
A: Hash,
D: Hash + ?Sized,
impl<A, B, C, D, E> Hash for (A, B, C, D, E) where
C: Hash,
E: Hash + ?Sized,
B: Hash,
A: Hash,
D: Hash, [src]
C: Hash,
E: Hash + ?Sized,
B: Hash,
A: Hash,
D: Hash,
impl<A, B, C, D, E, F> Hash for (A, B, C, D, E, F) where
C: Hash,
F: Hash + ?Sized,
E: Hash,
B: Hash,
A: Hash,
D: Hash, [src]
C: Hash,
F: Hash + ?Sized,
E: Hash,
B: Hash,
A: Hash,
D: Hash,
impl<A, B, C, D, E, F, G> Hash for (A, B, C, D, E, F, G) where
C: Hash,
F: Hash,
E: Hash,
B: Hash,
A: Hash,
G: Hash + ?Sized,
D: Hash, [src]
C: Hash,
F: Hash,
E: Hash,
B: Hash,
A: Hash,
G: Hash + ?Sized,
D: Hash,
impl<A, B, C, D, E, F, G, H> Hash for (A, B, C, D, E, F, G, H) where
C: Hash,
F: Hash,
E: Hash,
H: Hash + ?Sized,
B: Hash,
A: Hash,
G: Hash,
D: Hash, [src]
C: Hash,
F: Hash,
E: Hash,
H: Hash + ?Sized,
B: Hash,
A: Hash,
G: Hash,
D: Hash,
impl<A, B, C, D, E, F, G, H, I> Hash for (A, B, C, D, E, F, G, H, I) where
C: Hash,
F: Hash,
I: Hash + ?Sized,
E: Hash,
H: Hash,
B: Hash,
A: Hash,
G: Hash,
D: Hash, [src]
C: Hash,
F: Hash,
I: Hash + ?Sized,
E: Hash,
H: Hash,
B: Hash,
A: Hash,
G: Hash,
D: Hash,
impl<A, B, C, D, E, F, G, H, I, J> Hash for (A, B, C, D, E, F, G, H, I, J) where
C: Hash,
F: Hash,
I: Hash,
E: Hash,
H: Hash,
B: Hash,
A: Hash,
J: Hash + ?Sized,
G: Hash,
D: Hash, [src]
C: Hash,
F: Hash,
I: Hash,
E: Hash,
H: Hash,
B: Hash,
A: Hash,
J: Hash + ?Sized,
G: Hash,
D: Hash,
impl<A, B, C, D, E, F, G, H, I, J, K> Hash for (A, B, C, D, E, F, G, H, I, J, K) where
C: Hash,
F: Hash,
K: Hash + ?Sized,
I: Hash,
E: Hash,
H: Hash,
B: Hash,
A: Hash,
J: Hash,
G: Hash,
D: Hash, [src]
C: Hash,
F: Hash,
K: Hash + ?Sized,
I: Hash,
E: Hash,
H: Hash,
B: Hash,
A: Hash,
J: Hash,
G: Hash,
D: Hash,
impl<A, B, C, D, E, F, G, H, I, J, K, L> Hash for (A, B, C, D, E, F, G, H, I, J, K, L) where
C: Hash,
F: Hash,
K: Hash,
I: Hash,
E: Hash,
H: Hash,
B: Hash,
A: Hash,
J: Hash,
G: Hash,
D: Hash,
L: Hash + ?Sized, [src]
C: Hash,
F: Hash,
K: Hash,
I: Hash,
E: Hash,
H: Hash,
B: Hash,
A: Hash,
J: Hash,
G: Hash,
D: Hash,
L: Hash + ?Sized,
impl<Dyn> Hash for DynMetadata<Dyn> where
Dyn: ?Sized, [src]
Dyn: ?Sized,
impl<Idx> Hash for Range<Idx> where
Idx: Hash, [src]
Idx: Hash,
impl<Idx> Hash for RangeFrom<Idx> where
Idx: Hash, [src]
Idx: Hash,
impl<Idx> Hash for RangeInclusive<Idx> where
Idx: Hash, 1.26.0[src]
Idx: Hash,
impl<Idx> Hash for RangeTo<Idx> where
Idx: Hash, [src]
Idx: Hash,
impl<Idx> Hash for RangeToInclusive<Idx> where
Idx: Hash, 1.26.0[src]
Idx: Hash,
impl<K, V> Hash for BTreeMap<K, V> where
K: Hash,
V: Hash, [src]
K: Hash,
V: Hash,
impl<P> Hash for Pin<P> where
P: Deref,
<P as Deref>::Target: Hash, 1.41.0[src]
P: Deref,
<P as Deref>::Target: Hash,
impl<Ret> Hash for fn() -> Ret1.4.0[src]
impl<Ret> Hash for extern "C" fn() -> Ret1.4.0[src]
impl<Ret> Hash for unsafe fn() -> Ret1.4.0[src]
impl<Ret> Hash for unsafe extern "C" fn() -> Ret1.4.0[src]
impl<Ret, A> Hash for fn(A) -> Ret1.4.0[src]
impl<Ret, A> Hash for extern "C" fn(A) -> Ret1.4.0[src]
impl<Ret, A> Hash for extern "C" fn(A, ...) -> Ret1.4.0[src]
impl<Ret, A> Hash for unsafe fn(A) -> Ret1.4.0[src]
impl<Ret, A> Hash for unsafe extern "C" fn(A) -> Ret1.4.0[src]
impl<Ret, A> Hash for unsafe extern "C" fn(A, ...) -> Ret1.4.0[src]
impl<Ret, A, B> Hash for fn(A, B) -> Ret1.4.0[src]
impl<Ret, A, B> Hash for extern "C" fn(A, B) -> Ret1.4.0[src]
impl<Ret, A, B> Hash for extern "C" fn(A, B, ...) -> Ret1.4.0[src]
impl<Ret, A, B> Hash for unsafe fn(A, B) -> Ret1.4.0[src]
impl<Ret, A, B> Hash for unsafe extern "C" fn(A, B) -> Ret1.4.0[src]
impl<Ret, A, B> Hash for unsafe extern "C" fn(A, B, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C> Hash for fn(A, B, C) -> Ret1.4.0[src]
impl<Ret, A, B, C> Hash for extern "C" fn(A, B, C) -> Ret1.4.0[src]
impl<Ret, A, B, C> Hash for extern "C" fn(A, B, C, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C> Hash for unsafe fn(A, B, C) -> Ret1.4.0[src]
impl<Ret, A, B, C> Hash for unsafe extern "C" fn(A, B, C) -> Ret1.4.0[src]
impl<Ret, A, B, C> Hash for unsafe extern "C" fn(A, B, C, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D> Hash for fn(A, B, C, D) -> Ret1.4.0[src]
impl<Ret, A, B, C, D> Hash for extern "C" fn(A, B, C, D) -> Ret1.4.0[src]
impl<Ret, A, B, C, D> Hash for extern "C" fn(A, B, C, D, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D> Hash for unsafe fn(A, B, C, D) -> Ret1.4.0[src]
impl<Ret, A, B, C, D> Hash for unsafe extern "C" fn(A, B, C, D) -> Ret1.4.0[src]
impl<Ret, A, B, C, D> Hash for unsafe extern "C" fn(A, B, C, D, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E> Hash for fn(A, B, C, D, E) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E> Hash for extern "C" fn(A, B, C, D, E) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E> Hash for extern "C" fn(A, B, C, D, E, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E> Hash for unsafe fn(A, B, C, D, E) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E> Hash for unsafe extern "C" fn(A, B, C, D, E) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E> Hash for unsafe extern "C" fn(A, B, C, D, E, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F> Hash for fn(A, B, C, D, E, F) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F> Hash for extern "C" fn(A, B, C, D, E, F) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F> Hash for extern "C" fn(A, B, C, D, E, F, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F> Hash for unsafe fn(A, B, C, D, E, F) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F> Hash for unsafe extern "C" fn(A, B, C, D, E, F) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F> Hash for unsafe extern "C" fn(A, B, C, D, E, F, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G> Hash for fn(A, B, C, D, E, F, G) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G> Hash for extern "C" fn(A, B, C, D, E, F, G) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G> Hash for extern "C" fn(A, B, C, D, E, F, G, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G> Hash for unsafe fn(A, B, C, D, E, F, G) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G> Hash for unsafe extern "C" fn(A, B, C, D, E, F, G) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G> Hash for unsafe extern "C" fn(A, B, C, D, E, F, G, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H> Hash for fn(A, B, C, D, E, F, G, H) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H> Hash for extern "C" fn(A, B, C, D, E, F, G, H) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H> Hash for extern "C" fn(A, B, C, D, E, F, G, H, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H> Hash for unsafe fn(A, B, C, D, E, F, G, H) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H> Hash for unsafe extern "C" fn(A, B, C, D, E, F, G, H) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H> Hash for unsafe extern "C" fn(A, B, C, D, E, F, G, H, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I> Hash for fn(A, B, C, D, E, F, G, H, I) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I> Hash for extern "C" fn(A, B, C, D, E, F, G, H, I) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I> Hash for extern "C" fn(A, B, C, D, E, F, G, H, I, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I> Hash for unsafe fn(A, B, C, D, E, F, G, H, I) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I> Hash for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I> Hash for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J> Hash for fn(A, B, C, D, E, F, G, H, I, J) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J> Hash for extern "C" fn(A, B, C, D, E, F, G, H, I, J) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J> Hash for extern "C" fn(A, B, C, D, E, F, G, H, I, J, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J> Hash for unsafe fn(A, B, C, D, E, F, G, H, I, J) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J> Hash for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J> Hash for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Hash for fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Hash for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Hash for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Hash for unsafe fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Hash for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J, K> Hash for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Hash for fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Hash for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Hash for extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L, ...) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Hash for unsafe fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Hash for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L) -> Ret1.4.0[src]
impl<Ret, A, B, C, D, E, F, G, H, I, J, K, L> Hash for unsafe extern "C" fn(A, B, C, D, E, F, G, H, I, J, K, L, ...) -> Ret1.4.0[src]
impl<T> Hash for Bound<T> where
T: Hash, 1.17.0[src]
T: Hash,
impl<T> Hash for Option<T> where
T: Hash, [src]
T: Hash,
impl<T> Hash for Poll<T> where
T: Hash, 1.36.0[src]
T: Hash,
impl<T> Hash for *const T where
T: ?Sized, [src]
T: ?Sized,
impl<T> Hash for *mut T where
T: ?Sized, [src]
T: ?Sized,
impl<T> Hash for [T] where
T: Hash, [src]
T: Hash,
impl<T> Hash for Reverse<T> where
T: Hash, 1.19.0[src]
T: Hash,
impl<T> Hash for BTreeSet<T> where
T: Hash, [src]
T: Hash,
impl<T> Hash for LinkedList<T> where
T: Hash, [src]
T: Hash,
impl<T> Hash for PhantomData<T> where
T: ?Sized, [src]
T: ?Sized,
impl<T> Hash for Discriminant<T>1.21.0[src]
impl<T> Hash for ManuallyDrop<T> where
T: Hash + ?Sized, 1.20.0[src]
T: Hash + ?Sized,
impl<T> Hash for Wrapping<T> where
T: Hash, [src]
T: Hash,
impl<T> Hash for NonNull<T> where
T: ?Sized, 1.25.0[src]
T: ?Sized,
impl<T> Hash for Rc<T> where
T: Hash + ?Sized, [src]
T: Hash + ?Sized,
impl<T> Hash for Arc<T> where
T: Hash + ?Sized, [src]
T: Hash + ?Sized,
impl<T, A> Hash for Box<T, A> where
T: Hash + ?Sized,
A: Allocator, [src]
T: Hash + ?Sized,
A: Allocator,
impl<T, A> Hash for Vec<T, A> where
T: Hash,
A: Allocator, [src]
T: Hash,
A: Allocator,
impl<T, E> Hash for Result<T, E> where
T: Hash,
E: Hash, [src]
T: Hash,
E: Hash,
impl<T, const N: usize> Hash for [T; N] where
T: Hash, [src]
T: Hash,
impl<Y, R> Hash for GeneratorState<Y, R> where
R: Hash,
Y: Hash, [src]
R: Hash,
Y: Hash,