Trait nom::lib::std::hash::Hash 1.0.0
[−]
[src]
pub trait Hash { fn hash<H>(&self, state: &mut H)
where
H: Hasher; fn hash_slice<H>(data: &[Self], state: &mut H)
where
H: Hasher, { ... } }
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
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 SocketAddr
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impl Hash for Ipv4Addr
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impl<'a> Hash for Prefix<'a>
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impl Hash for CStr
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impl Hash for CString
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impl Hash for SocketAddrV4
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impl Hash for SystemTime
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impl Hash for Ipv6Addr
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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 FileType
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impl Hash for Instant
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impl Hash for OsStr
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impl Hash for ErrorKind
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impl Hash for Ipv6MulticastScope
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impl Hash for Path
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impl Hash for IpAddr
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impl Hash for SocketAddrV6
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impl<'a> Hash for PrefixComponent<'a>
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impl Hash for OsString
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impl Hash for PathBuf
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impl Hash for u64x2
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impl Hash for u16x4
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impl<T> Hash for PhantomData<T> where
T: ?Sized,
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T: ?Sized,
impl Hash for i8x4
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impl Hash for u64x8
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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,
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A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash + ?Sized,
impl Hash for u8x16
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impl Hash for Duration
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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<T> Hash for [T; 18] where
T: Hash,
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T: Hash,
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,
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A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash + ?Sized,
impl Hash for i64
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impl<Ret, A, B, C, D> Hash for extern "C" fn(A, B, C, D, ...) -> Ret
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impl<Ret, A> Hash for fn(A) -> Ret
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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
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impl Hash for i128
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impl<T> Hash for [T; 10] where
T: Hash,
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T: Hash,
impl Hash for u8x64
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impl<T> Hash for [T; 19] where
T: Hash,
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T: Hash,
impl<T> Hash for [T; 32] where
T: Hash,
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T: Hash,
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<Ret, A, B, C> Hash for extern "C" fn(A, B, C, ...) -> Ret
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impl<Ret, A, B, C> Hash for unsafe extern "C" fn(A, B, C) -> Ret
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impl<T> Hash for [T; 0] where
T: Hash,
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T: Hash,
impl Hash for i16
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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
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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
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impl<Ret, A, B, C, D> Hash for fn(A, B, C, D) -> Ret
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impl<A, B, C, D> Hash for (A, B, C, D) where
A: Hash,
B: Hash,
C: Hash,
D: Hash + ?Sized,
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A: Hash,
B: Hash,
C: Hash,
D: Hash + ?Sized,
impl<Ret, A, B> Hash for unsafe fn(A, B) -> Ret
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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 [T; 2] where
T: Hash,
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T: Hash,
impl<T> Hash for [T; 21] where
T: Hash,
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T: Hash,
impl<T> Hash for [T; 6] where
T: Hash,
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T: Hash,
impl Hash for u8x4
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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, B, C> Hash for fn(A, B, C) -> Ret
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impl Hash for i16x4
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impl Hash for i8x8
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impl Hash for i16x2
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impl<Ret, A, B, C, D, E, F, G, H> Hash for unsafe fn(A, B, C, D, E, F, G, H) -> 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> Hash for unsafe extern "C" fn() -> 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
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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<Ret, A, B, C> Hash for extern "C" fn(A, B, C) -> Ret
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impl Hash for u32x8
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impl<Ret, A, B, C, D, E> Hash for unsafe 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<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, C, D, E, F, G> Hash for extern "C" fn(A, B, C, D, E, F, G, ...) -> Ret
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impl<'a, T> Hash for &'a T where
T: Hash + ?Sized,
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T: Hash + ?Sized,
impl Hash for i64x8
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impl<T> Hash for [T; 5] where
T: Hash,
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T: Hash,
impl Hash for i32x16
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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
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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
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impl Hash for u64
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impl<Ret, A, B, C, D, E> Hash for unsafe extern "C" fn(A, B, C, D, E, ...) -> Ret
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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
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impl<T> Hash for [T; 12] where
T: Hash,
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T: Hash,
impl Hash for u64x4
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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
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impl Hash for i32
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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
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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> Hash for unsafe fn(A, B, C, D, E) -> Ret
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impl<Ret, A> Hash for unsafe fn(A) -> Ret
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impl<A, B, C> Hash for (A, B, C) where
A: Hash,
B: Hash,
C: Hash + ?Sized,
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A: Hash,
B: Hash,
C: Hash + ?Sized,
impl<T> Hash for [T; 1] where
T: Hash,
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T: Hash,
impl<Ret, A, B, C, D> Hash for unsafe fn(A, B, C, D) -> Ret
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impl<Ret, A, B, C, D> Hash for extern "C" fn(A, B, C, D) -> Ret
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impl<T> Hash for [T; 25] where
T: Hash,
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T: Hash,
impl Hash for i16x16
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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, 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<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,
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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,
L: Hash + ?Sized,
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
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impl<T> Hash for [T; 15] where
T: Hash,
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T: Hash,
impl Hash for ()
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impl<Ret, A, B> Hash for unsafe extern "C" fn(A, B) -> 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 Hash for i16x8
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impl<Ret, A, B, C, D, E, F, G, H, I> Hash for fn(A, B, C, D, E, F, G, H, I) -> Ret
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impl Hash for i8x2
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impl<T> Hash for [T; 31] where
T: Hash,
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T: Hash,
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
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impl Hash for u8x8
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impl Hash for usize
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impl Hash for u16x8
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impl Hash for u32
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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 Hash for u8x2
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impl Hash for isize
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impl<T> Hash for [T; 23] where
T: Hash,
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T: Hash,
impl Hash for i32x2
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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
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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<T> Hash for *mut T where
T: ?Sized,
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T: ?Sized,
impl<T> Hash for [T; 14] where
T: Hash,
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T: 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
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 Hash for i8x64
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impl<T> Hash for [T; 16] where
T: Hash,
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T: Hash,
impl<Ret, A, B, C, D, E, F, G, H> Hash for fn(A, B, C, D, E, F, G, H) -> Ret
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impl Hash for u16x32
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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
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impl<T> Hash for [T; 13] where
T: Hash,
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T: Hash,
impl Hash for u16x16
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impl Hash for u32x16
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impl Hash for str
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impl Hash for i16x32
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impl<T> Hash for [T; 8] where
T: Hash,
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T: Hash,
impl<Ret> Hash for extern "C" fn() -> Ret
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impl Hash for i8x16
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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 i32x4
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impl<Ret, A, B, C, D, E, F> Hash for fn(A, B, C, D, E, F) -> Ret
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impl<T> Hash for [T; 26] where
T: Hash,
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T: Hash,
impl Hash for u32x4
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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
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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
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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,
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A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash,
G: Hash,
H: Hash + ?Sized,
impl<T> Hash for Wrapping<T> where
T: Hash,
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T: Hash,
impl Hash for u16x2
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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
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impl<T> Hash for [T; 28] 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
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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
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impl<Ret, A, B> Hash for extern "C" fn(A, B) -> 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<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
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impl<T> Hash for [T; 7] where
T: Hash,
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T: Hash,
impl Hash for i64x4
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impl Hash for u8x32
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impl Hash for char
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impl<'a, T> Hash for &'a mut T where
T: Hash + ?Sized,
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T: Hash + ?Sized,
impl<T> Hash for [T; 3] where
T: Hash,
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T: Hash,
impl Hash for u8
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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 unsafe extern "C" fn(A, B, C, ...) -> 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 Hash for u128
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impl<T> Hash for [T; 20] where
T: Hash,
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T: Hash,
impl<Ret, A, B> Hash for unsafe extern "C" fn(A, B, ...) -> Ret
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impl<Ret> Hash for unsafe fn() -> Ret
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impl Hash for bool
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impl<T> Hash for [T; 30] where
T: Hash,
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T: Hash,
impl<T> Hash for [T; 27] where
T: Hash,
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T: Hash,
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<T> Hash for NonNull<T> where
T: ?Sized,
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T: ?Sized,
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
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impl Hash for i32x8
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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
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impl<T> Hash for NonZero<T> where
T: Zeroable + Hash,
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T: Zeroable + Hash,
impl<Ret, A, B, C, D, E, F> Hash for extern "C" fn(A, B, C, D, E, F, ...) -> Ret
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impl<T> Hash for [T; 4] where
T: Hash,
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T: Hash,
impl<T> Hash for [T; 29] where
T: Hash,
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T: 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
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<Ret, A, B> Hash for fn(A, B) -> Ret
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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,
[src]
A: Hash,
B: Hash,
C: Hash,
D: Hash,
E: Hash,
F: Hash,
G: Hash,
H: Hash,
I: Hash + ?Sized,
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
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impl Hash for i64x2
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impl<Ret, A> Hash for unsafe extern "C" fn(A, ...) -> Ret
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impl<T> Hash for [T; 9] where
T: Hash,
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T: Hash,
impl<T> Hash for *const T where
T: ?Sized,
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T: ?Sized,
impl<Ret, A, B> Hash for extern "C" fn(A, B, ...) -> Ret
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impl<T> Hash for [T] where
T: Hash,
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T: Hash,
impl Hash for i8
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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
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impl Hash for TypeId
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impl<T> Hash for [T; 11] where
T: Hash,
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T: Hash,
impl Hash for i8x32
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impl Hash for u16
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impl<A> Hash for (A,) where
A: Hash + ?Sized,
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A: Hash + ?Sized,
impl<Ret, A> Hash for extern "C" fn(A, ...) -> Ret
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impl<T> Hash for [T; 24] where
T: Hash,
[src]
T: Hash,
impl<Ret> Hash for fn() -> Ret
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impl<Ret, A> Hash for extern "C" fn(A) -> Ret
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impl Hash for u32x2
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impl<Ret, A, B, C, D, E, F> Hash for unsafe fn(A, B, C, D, E, F) -> Ret
[src]
impl<T> Hash for [T; 22] where
T: Hash,
[src]
T: Hash,
impl<Ret, A, B, C, D, E, F> Hash for extern "C" fn(A, B, C, D, E, F) -> Ret
[src]
impl<T> Hash for [T; 17] where
T: Hash,
[src]
T: Hash,
impl<T> Hash for Arc<T> where
T: Hash + ?Sized,
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T: Hash + ?Sized,
impl<T> Hash for Rc<T> where
T: Hash + ?Sized,
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T: Hash + ?Sized,
impl<'a, B> Hash for Cow<'a, B> where
B: Hash + ToOwned + ?Sized,
[src]
B: Hash + ToOwned + ?Sized,
Implementors
impl<Idx> Hash for RangeFrom<Idx> where
Idx: Hash,impl<T> Hash for Discriminant<T>
impl Hash for Error
impl<T> Hash for Option<T> where
T: Hash,impl<T> Hash for Reverse<T> where
T: Hash,impl<Idx> Hash for RangeTo<Idx> where
Idx: Hash,impl<Idx> Hash for Range<Idx> where
Idx: Hash,impl<T, E> Hash for Result<T, E> where
E: Hash,
T: Hash,impl Hash for Infallible
impl Hash for RangeFull
impl<Idx> Hash for RangeInclusive<Idx> where
Idx: Hash,impl<Idx> Hash for RangeToInclusive<Idx> where
Idx: Hash,impl<T> Hash for ManuallyDrop<T> where
T: Hash,impl Hash for Ordering
impl<Y, R> Hash for GeneratorState<Y, R> where
R: Hash,
Y: Hash,impl Hash for NoneError
impl<T> Hash for Bound<T> where
T: Hash,impl<T> Hash for Vec<T> where
T: Hash,impl Hash for String
impl<A> Hash for VecDeque<A> where
A: Hash,impl<T> Hash for LinkedList<T> where
T: Hash,impl<K, V> Hash for BTreeMap<K, V> where
K: Hash,
V: Hash,impl<T> Hash for BTreeSet<T> where
T: Hash,impl<T> Hash for Box<T> where
T: Hash + ?Sized,impl<E: Hash> Hash for nom::ErrorKind<E>
impl<'a> Hash for CompleteStr<'a>
impl<'a> Hash for CompleteByteSlice<'a>
impl<T: Hash> Hash for Input<T>