1.0.0[−][src]Trait mod_utilities::collections::map::Hash
A hashable type.
Types implementing Hash
are able to be hash
ed 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, }
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); } }
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
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0
H: Hasher,
Implementations on Foreign Types
impl Hash for Instant
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impl Hash for OsStr
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impl<'a> Hash for Prefix<'a>
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impl<'a> Hash for Component<'a>
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impl Hash for ThreadId
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impl Hash for Ipv6Addr
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impl Hash for FileType
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impl Hash for SystemTime
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impl Hash for Path
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impl Hash for ErrorKind
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impl Hash for OsString
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impl Hash for SocketAddr
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impl Hash for Ipv4Addr
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impl Hash for SocketAddrV6
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impl Hash for CString
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impl Hash for PathBuf
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impl Hash for SocketAddrV4
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impl<'_> Hash for PrefixComponent<'_>
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impl Hash for Ipv6MulticastScope
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impl Hash for IpAddr
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impl Hash for CStr
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impl<T> Hash for ManuallyDrop<T> where
T: Hash + ?Sized,
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T: Hash + ?Sized,
impl<Ret, A, B, C, D, E, F, G, H> Hash for unsafe extern "C" fn(A, B, C, D, E, F, G, H) -> Ret
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impl<Ret, A> Hash for unsafe fn(A) -> Ret
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impl<Ret, A> Hash for extern "C" fn(A) -> Ret
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impl<Ret, A, B, C, D, E, F> Hash for unsafe fn(A, B, C, D, E, F) -> Ret
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impl Hash for bool
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impl<Ret, A, B, C, D, E, F> Hash for unsafe extern "C" fn(A, B, C, D, E, F) -> Ret
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impl<Ret, A, B, C, D, E, F, G> Hash for extern "C" fn(A, B, C, D, E, F, G) -> Ret
[src]
impl Hash for isize
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fn hash<H>(&self, state: &mut H) where
H: Hasher,
[src]
H: Hasher,
fn hash_slice<H>(data: &[isize], state: &mut H) where
H: Hasher,
[src]
H: Hasher,
impl Hash for Error
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impl Hash for NonZeroUsize
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impl<'_, T> Hash for &'_ mut T where
T: Hash + ?Sized,
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T: Hash + ?Sized,
impl<Ret> Hash for fn() -> Ret
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impl Hash for NonZeroI32
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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
A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash,
G: Hash,
H: Hash,
I: Hash,
J: Hash,
K: Hash + ?Sized,
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A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash,
G: Hash,
H: Hash,
I: Hash,
J: Hash,
K: Hash + ?Sized,
impl<A> Hash for (A,) where
A: Hash + ?Sized,
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A: Hash + ?Sized,
impl<A, B, C, D, E, F, G> Hash for (A, B, C, D, E, F, G) where
A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash,
G: Hash + ?Sized,
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A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash,
G: Hash + ?Sized,
impl Hash for !
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impl<Idx> Hash for RangeInclusive<Idx> where
Idx: Hash,
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Idx: Hash,
impl Hash for Ordering
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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) -> Ret
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impl Hash for NonZeroU64
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impl<Ret> Hash for unsafe fn() -> Ret
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impl<Ret, A> Hash for unsafe extern "C" fn(A, ...) -> Ret
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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) -> Ret
[src]
impl<T, E> Hash for Result<T, E> where
E: Hash,
T: Hash,
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E: Hash,
T: Hash,
impl<A, B, C, D, E, F, G, H, I> Hash for (A, B, C, D, E, F, G, H, I) where
A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash,
G: Hash,
H: Hash,
I: Hash + ?Sized,
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A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash,
G: Hash,
H: Hash,
I: Hash + ?Sized,
impl Hash for char
[src]
impl Hash for PhantomPinned
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impl<Ret, A, B, C, D> Hash for fn(A, B, C, D) -> Ret
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impl<Ret, A, B, C, D, E> Hash for extern "C" fn(A, B, C, D, E) -> Ret
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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
A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash,
G: Hash,
H: Hash,
I: Hash,
J: Hash,
K: Hash,
L: Hash + ?Sized,
[src]
A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash,
G: Hash,
H: Hash,
I: Hash,
J: Hash,
K: Hash,
L: Hash + ?Sized,
impl<T> Hash for Wrapping<T> where
T: Hash,
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T: Hash,
impl<T> Hash for Reverse<T> where
T: Hash,
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T: Hash,
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) -> Ret
[src]
impl<Ret, A, B, C, D> Hash for extern "C" fn(A, B, C, D) -> Ret
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impl<Ret, A, B, C, D, E> Hash for extern "C" fn(A, B, C, D, E, ...) -> Ret
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impl<Ret, A, B, C, D, E, F, G> Hash for unsafe extern "C" fn(A, B, C, D, E, F, G) -> Ret
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impl Hash for RangeFull
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impl<Ret> Hash for unsafe extern "C" fn() -> Ret
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impl Hash for NonZeroI8
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impl<Ret, A, B, C, D, E, F, G> Hash for fn(A, B, C, D, E, F, G) -> Ret
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impl<Ret, A, B, C> Hash for extern "C" fn(A, B, C, ...) -> Ret
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impl Hash for i64
[src]
fn hash<H>(&self, state: &mut H) where
H: Hasher,
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H: Hasher,
fn hash_slice<H>(data: &[i64], state: &mut H) where
H: Hasher,
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H: Hasher,
impl<Ret, A, B, C, D, E> Hash for unsafe extern "C" fn(A, B, C, D, E) -> Ret
[src]
impl<Ret, A, B, C, D> Hash for extern "C" fn(A, B, C, D, ...) -> Ret
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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, ...) -> Ret
[src]
impl Hash for i16
[src]
fn hash<H>(&self, state: &mut H) where
H: Hasher,
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H: Hasher,
fn hash_slice<H>(data: &[i16], state: &mut H) where
H: Hasher,
[src]
H: Hasher,
impl Hash for i8
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fn hash<H>(&self, state: &mut H) where
H: Hasher,
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H: Hasher,
fn hash_slice<H>(data: &[i8], state: &mut H) where
H: Hasher,
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H: Hasher,
impl<Ret, A, B, C, D, E, F, G> Hash for unsafe fn(A, B, C, D, E, F, G) -> Ret
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impl<Ret, A, B> Hash for extern "C" fn(A, B) -> Ret
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impl Hash for NonZeroU32
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impl<Ret, A, B, C> Hash for unsafe fn(A, B, C) -> Ret
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impl<T> Hash for *const T where
T: ?Sized,
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T: ?Sized,
impl Hash for Ordering
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impl<T> Hash for *mut T where
T: ?Sized,
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T: ?Sized,
impl<Ret, A, B> Hash for fn(A, B) -> Ret
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impl<T> Hash for Poll<T> where
T: Hash,
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T: Hash,
impl<T> Hash for NonNull<T> where
T: ?Sized,
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T: ?Sized,
impl Hash for ()
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impl<Ret, A, B, C, D, E, F, G, H> Hash for extern "C" fn(A, B, C, D, E, F, G, H, ...) -> Ret
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impl Hash for Infallible
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impl<Ret, A, B, C, D, E> Hash for fn(A, B, C, D, E) -> Ret
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impl Hash for u128
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fn hash<H>(&self, state: &mut H) where
H: Hasher,
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H: Hasher,
fn hash_slice<H>(data: &[u128], state: &mut H) where
H: Hasher,
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H: Hasher,
impl<P> Hash for Pin<P> where
P: Deref,
<P as Deref>::Target: Hash,
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P: Deref,
<P as Deref>::Target: Hash,
impl<Ret, A, B, C, D, E> Hash for unsafe extern "C" fn(A, B, C, D, E, ...) -> Ret
[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) -> Ret
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impl Hash for TypeId
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impl<A, B, C, D, E, F, G, H, I, J> Hash for (A, B, C, D, E, F, G, H, I, J) where
A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash,
G: Hash,
H: Hash,
I: Hash,
J: Hash + ?Sized,
[src]
A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash,
G: Hash,
H: Hash,
I: Hash,
J: Hash + ?Sized,
impl<T> Hash for [T] where
T: Hash,
[src]
T: Hash,
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, ...) -> Ret
[src]
impl<Idx> Hash for RangeToInclusive<Idx> where
Idx: Hash,
[src]
Idx: Hash,
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) -> Ret
[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) -> Ret
[src]
impl Hash for i128
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fn hash<H>(&self, state: &mut H) where
H: Hasher,
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H: Hasher,
fn hash_slice<H>(data: &[i128], state: &mut H) where
H: Hasher,
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H: Hasher,
impl<Ret, A, B, C, D, E, F, G, H, I> Hash for unsafe fn(A, B, C, D, E, F, G, H, I) -> Ret
[src]
impl<Ret, A, B, C> Hash for unsafe extern "C" fn(A, B, C, ...) -> Ret
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impl Hash for u8
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fn hash<H>(&self, state: &mut H) where
H: Hasher,
[src]
H: Hasher,
fn hash_slice<H>(data: &[u8], state: &mut H) where
H: Hasher,
[src]
H: Hasher,
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, ...) -> Ret
[src]
impl<Ret, A, B, C> Hash for unsafe extern "C" fn(A, B, C) -> Ret
[src]
impl<Idx> Hash for Range<Idx> where
Idx: Hash,
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Idx: Hash,
impl<Ret, A, B, C, D> Hash for unsafe extern "C" fn(A, B, C, D, ...) -> Ret
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impl<Ret, A, B, C, D> Hash for unsafe extern "C" fn(A, B, C, D) -> Ret
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impl<A, B> Hash for (A, B) where
A: Hash,
B: Hash + ?Sized,
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A: Hash,
B: Hash + ?Sized,
impl<Ret, A, B, C, D, E, F, G, H> Hash for fn(A, B, C, D, E, F, G, H) -> Ret
[src]
impl Hash for u64
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fn hash<H>(&self, state: &mut H) where
H: Hasher,
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H: Hasher,
fn hash_slice<H>(data: &[u64], state: &mut H) where
H: Hasher,
[src]
H: Hasher,
impl<Ret, A, B, C, D, E, F> Hash for fn(A, B, C, D, E, F) -> Ret
[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) -> Ret
[src]
impl Hash for i32
[src]
fn hash<H>(&self, state: &mut H) where
H: Hasher,
[src]
H: Hasher,
fn hash_slice<H>(data: &[i32], state: &mut H) where
H: Hasher,
[src]
H: Hasher,
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, ...) -> Ret
[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) -> Ret
[src]
impl Hash for str
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impl Hash for NoneError
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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, ...) -> Ret
[src]
impl<Ret, A> Hash for fn(A) -> Ret
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impl Hash for NonZeroU128
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impl Hash for NonZeroIsize
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impl Hash for Duration
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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, ...) -> Ret
[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, ...) -> Ret
[src]
impl<Ret, A, B, C, D, E> Hash for unsafe fn(A, B, C, D, E) -> Ret
[src]
impl Hash for NonZeroI16
[src]
impl<Ret, A, B, C, D, E, F> Hash for unsafe extern "C" fn(A, B, C, D, E, F, ...) -> Ret
[src]
impl<Ret, A, B, C, D, E, F, G> Hash for extern "C" fn(A, B, C, D, E, F, G, ...) -> Ret
[src]
impl<Idx> Hash for RangeFrom<Idx> where
Idx: Hash,
[src]
Idx: Hash,
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) -> Ret
[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, ...) -> Ret
[src]
impl<T> Hash for Option<T> where
T: Hash,
[src]
T: Hash,
impl<Ret, A, B, C, D> Hash for unsafe fn(A, B, C, D) -> Ret
[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) -> Ret
[src]
impl<Ret, A, B> Hash for unsafe extern "C" fn(A, B, ...) -> Ret
[src]
impl<Ret, A, B, C> Hash for fn(A, B, C) -> Ret
[src]
impl<A, B, C, D, E, F, G, H> Hash for (A, B, C, D, E, F, G, H) where
A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash,
G: Hash,
H: Hash + ?Sized,
[src]
A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash,
G: Hash,
H: Hash + ?Sized,
impl<Ret, A, B, C, D, E, F, G, H, I> Hash for fn(A, B, C, D, E, F, G, H, I) -> Ret
[src]
impl<Ret, A, B> Hash for extern "C" fn(A, B, ...) -> Ret
[src]
impl Hash for NonZeroU16
[src]
impl<T> Hash for Discriminant<T>
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impl Hash for NonZeroI64
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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, ...) -> Ret
[src]
impl<Ret, A, B> Hash for unsafe fn(A, B) -> Ret
[src]
impl<A, B, C, D, E, F> Hash for (A, B, C, D, E, F) where
A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash + ?Sized,
[src]
A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash + ?Sized,
impl<Idx> Hash for RangeTo<Idx> where
Idx: Hash,
[src]
Idx: Hash,
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) -> Ret
[src]
impl<Ret, A, B> Hash for unsafe extern "C" fn(A, B) -> Ret
[src]
impl Hash for usize
[src]
fn hash<H>(&self, state: &mut H) where
H: Hasher,
[src]
H: Hasher,
fn hash_slice<H>(data: &[usize], state: &mut H) where
H: Hasher,
[src]
H: Hasher,
impl Hash for NonZeroI128
[src]
impl Hash for NonZeroU8
[src]
impl<Y, R> Hash for GeneratorState<Y, R> where
R: Hash,
Y: Hash,
[src]
R: Hash,
Y: Hash,
impl<A, B, C, D> Hash for (A, B, C, D) where
A: Hash,
B: Hash,
C: Hash,
D: Hash + ?Sized,
[src]
A: Hash,
B: Hash,
C: Hash,
D: Hash + ?Sized,
impl<Ret, A, B, C, D, E, F, G, H> Hash for unsafe fn(A, B, C, D, E, F, G, H) -> Ret
[src]
impl<Ret> Hash for extern "C" fn() -> Ret
[src]
impl<T> Hash for Bound<T> where
T: Hash,
[src]
T: Hash,
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) -> Ret
[src]
impl<Ret, A, B, C> Hash for extern "C" fn(A, B, C) -> Ret
[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) -> Ret
[src]
impl<const N: usize, T> Hash for [T; N] where
T: Hash,
[T; N]: LengthAtMost32,
[src]
T: Hash,
[T; N]: LengthAtMost32,
impl<Ret, A, B, C, D, E, F, G, H> Hash for extern "C" fn(A, B, C, D, E, F, G, H) -> Ret
[src]
impl Hash for u16
[src]
fn hash<H>(&self, state: &mut H) where
H: Hasher,
[src]
H: Hasher,
fn hash_slice<H>(data: &[u16], state: &mut H) where
H: Hasher,
[src]
H: Hasher,
impl<Ret, A> Hash for unsafe extern "C" fn(A) -> Ret
[src]
impl Hash for u32
[src]
fn hash<H>(&self, state: &mut H) where
H: Hasher,
[src]
H: Hasher,
fn hash_slice<H>(data: &[u32], state: &mut H) where
H: Hasher,
[src]
H: Hasher,
impl<A, B, C, D, E> Hash for (A, B, C, D, E) where
A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash + ?Sized,
[src]
A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash + ?Sized,
impl<Ret, A, B, C, D, E, F> Hash for extern "C" fn(A, B, C, D, E, F, ...) -> Ret
[src]
impl<A, B, C> Hash for (A, B, C) where
A: Hash,
B: Hash,
C: Hash + ?Sized,
[src]
A: Hash,
B: Hash,
C: Hash + ?Sized,
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) -> Ret
[src]
impl<'_, T> Hash for &'_ T where
T: Hash + ?Sized,
[src]
T: Hash + ?Sized,
impl<Ret, A> Hash for extern "C" fn(A, ...) -> Ret
[src]
impl<Ret, A, B, C, D, E, F> Hash for extern "C" fn(A, B, C, D, E, F) -> Ret
[src]
impl<Ret, A, B, C, D, E, F, G> Hash for unsafe extern "C" fn(A, B, C, D, E, F, G, ...) -> Ret
[src]
impl<'_, B> Hash for Cow<'_, B> where
B: Hash + ToOwned + ?Sized,
[src]
B: Hash + ToOwned + ?Sized,
impl<T> Hash for Rc<T> where
T: Hash + ?Sized,
[src]
T: Hash + ?Sized,
impl<K, V> Hash for BTreeMap<K, V> where
K: Hash,
V: Hash,
[src]
K: Hash,
V: Hash,
impl<T> Hash for Vec<T> where
T: Hash,
[src]
T: Hash,
impl<T> Hash for Box<T> where
T: Hash + ?Sized,
[src]
T: Hash + ?Sized,
impl<T> Hash for BTreeSet<T> where
T: Hash,
[src]
T: Hash,
impl<A> Hash for VecDeque<A> where
A: Hash,
[src]
A: Hash,
impl Hash for String
[src]
impl<T> Hash for Arc<T> where
T: Hash + ?Sized,
[src]
T: Hash + ?Sized,
impl<T> Hash for LinkedList<T> where
T: Hash,
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T: Hash,
Implementors
impl Hash for DefaultKey
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impl Hash for KeyData
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impl<T> Hash for PhantomData<T> where
T: ?Sized,
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T: ?Sized,