Trait rocket::mtls::oid::asn1_rs::nom::lib::std::hash::Hash

1.0.0 · source ·
pub trait Hash {
    // Required method
    fn hash<H>(&self, state: &mut H)
       where H: Hasher;

    // Provided method
    fn hash_slice<H>(data: &[Self], state: &mut H)
       where H: Hasher,
             Self: Sized { ... }
}
Available on crate feature mtls only.
Expand description

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,
}

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)].

Violating this property is a logic error. The behavior resulting from a logic error is not specified, but users of the trait must ensure that such logic errors do not result in undefined behavior. This means that unsafe code must not rely on the correctness of these methods.

§Prefix collisions

Implementations of hash should ensure that the data they pass to the Hasher are prefix-free. That is, values which are not equal should cause two different sequences of values to be written, and neither of the two sequences should be a prefix of the other.

For example, the standard implementation of Hash for &str passes an extra 0xFF byte to the Hasher so that the values ("ab", "c") and ("a", "bc") hash differently.

§Portability

Due to differences in endianness and type sizes, data fed by Hash to a Hasher should not be considered portable across platforms. Additionally the data passed by most standard library types should not be considered stable between compiler versions.

This means tests shouldn’t probe hard-coded hash values or data fed to a Hasher and instead should check consistency with Eq.

Serialization formats intended to be portable between platforms or compiler versions should either avoid encoding hashes or only rely on Hash and Hasher implementations that provide additional guarantees.

Required Methods§

source

fn hash<H>(&self, state: &mut H)
where H: Hasher,

Feeds this value into the given Hasher.

§Examples
use std::hash::{DefaultHasher, Hash, Hasher};

let mut hasher = DefaultHasher::new();
7920.hash(&mut hasher);
println!("Hash is {:x}!", hasher.finish());

Provided Methods§

1.3.0 · source

fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

This method is meant as a convenience, but its implementation is also explicitly left unspecified. It isn’t guaranteed to be equivalent to repeated calls of hash and implementations of Hash should keep that in mind and call hash themselves if the slice isn’t treated as a whole unit in the PartialEq implementation.

For example, a VecDeque implementation might naïvely call as_slices and then hash_slice on each slice, but this is wrong since the two slices can change with a call to make_contiguous without affecting the PartialEq result. Since these slices aren’t treated as singular units, and instead part of a larger deque, this method cannot be used.

§Examples
use std::hash::{DefaultHasher, Hash, Hasher};

let mut hasher = DefaultHasher::new();
let numbers = [6, 28, 496, 8128];
Hash::hash_slice(&numbers, &mut hasher);
println!("Hash is {:x}!", hasher.finish());

Object Safety§

This trait is not object safe.

Implementors§

source§

impl Hash for CipherSuite

source§

impl Hash for Sig

§

impl Hash for rocket::http::Method

§

impl Hash for SameSite

§

impl Hash for StatusClass

source§

impl Hash for Feature

source§

impl Hash for Sign

§

impl Hash for rocket::mtls::oid::asn1_rs::nom::error::ErrorKind

source§

impl Hash for rocket::mtls::oid::asn1_rs::nom::lib::std::cmp::Ordering

1.44.0 · source§

impl Hash for Infallible

source§

impl Hash for AsciiChar

1.7.0 · source§

impl Hash for core::net::ip_addr::IpAddr

source§

impl Hash for Ipv6MulticastScope

source§

impl Hash for SocketAddr

source§

impl Hash for core::sync::atomic::Ordering

source§

impl Hash for std::io::error::ErrorKind

source§

impl Hash for log::Level

source§

impl Hash for log::LevelFilter

source§

impl Hash for Month

source§

impl Hash for Weekday

source§

impl Hash for Attribute

source§

impl Hash for Quirk

source§

impl Hash for Color

source§

impl Hash for bool

source§

impl Hash for char

source§

impl Hash for i8

source§

impl Hash for i16

source§

impl Hash for i32

source§

impl Hash for i64

source§

impl Hash for i128

source§

impl Hash for isize

1.29.0 · source§

impl Hash for !

source§

impl Hash for str

source§

impl Hash for u8

source§

impl Hash for u16

source§

impl Hash for u32

source§

impl Hash for u64

source§

impl Hash for u128

source§

impl Hash for ()

source§

impl Hash for usize

source§

impl Hash for ByteUnit

source§

impl Hash for rocket::form::name::Key

source§

impl Hash for rocket::form::name::Name

source§

impl Hash for NameBuf<'_>

source§

impl Hash for NameView<'_>

§

impl Hash for ContentType

§

impl Hash for MediaType

§

impl Hash for RawStr

§

impl Hash for RawStrBuf

§

impl Hash for Status

§

impl Hash for Uncased<'_>

§

impl Hash for UncasedStr

§

impl Hash for Absolute<'_>

§

impl Hash for Asterisk

§

impl Hash for rocket::http::uri::Authority<'_>

§

impl Hash for Host<'_>

§

impl Hash for Origin<'_>

§

impl Hash for rocket::http::uri::Path<'_>

§

impl Hash for Query<'_>

§

impl Hash for Reference<'_>

source§

impl Hash for Event

source§

impl Hash for Braced

source§

impl Hash for Hyphenated

source§

impl Hash for Simple

source§

impl Hash for Urn

source§

impl Hash for rocket::serde::uuid::Error

source§

impl Hash for Uuid

source§

impl Hash for BigInt

source§

impl Hash for BigUint

§

impl Hash for ASN1Time

1.28.0 · source§

impl Hash for Layout

source§

impl Hash for rocket::mtls::oid::asn1_rs::nom::lib::std::fmt::Error

source§

impl Hash for RangeFull

source§

impl Hash for String

1.64.0 · source§

impl Hash for CString

source§

impl Hash for TypeId

1.64.0 · source§

impl Hash for CStr

1.33.0 · source§

impl Hash for PhantomPinned

source§

impl Hash for Ipv4Addr

source§

impl Hash for Ipv6Addr

source§

impl Hash for SocketAddrV4

source§

impl Hash for SocketAddrV6

1.34.0 · source§

impl Hash for NonZero<i8>

1.34.0 · source§

impl Hash for NonZero<i16>

1.34.0 · source§

impl Hash for NonZero<i32>

1.34.0 · source§

impl Hash for NonZero<i64>

1.34.0 · source§

impl Hash for NonZero<i128>

1.34.0 · source§

impl Hash for NonZero<isize>

1.28.0 · source§

impl Hash for NonZero<u8>

1.28.0 · source§

impl Hash for NonZero<u16>

1.28.0 · source§

impl Hash for NonZero<u32>

1.28.0 · source§

impl Hash for NonZero<u64>

1.28.0 · source§

impl Hash for NonZero<u128>

1.28.0 · source§

impl Hash for NonZero<usize>

source§

impl Hash for Alignment

1.3.0 · source§

impl Hash for core::time::Duration

source§

impl Hash for OsStr

source§

impl Hash for OsString

1.1.0 · source§

impl Hash for FileType

source§

impl Hash for std::os::unix::ucred::UCred

source§

impl Hash for std::path::Path

source§

impl Hash for PathBuf

source§

impl Hash for PrefixComponent<'_>

1.19.0 · source§

impl Hash for ThreadId

1.8.0 · source§

impl Hash for std::time::Instant

1.8.0 · source§

impl Hash for SystemTime

source§

impl Hash for bytes::bytes::Bytes

source§

impl Hash for BytesMut

source§

impl Hash for Profile

source§

impl Hash for Tag

source§

impl Hash for StreamId

source§

impl Hash for http::header::name::HeaderName

source§

impl Hash for http::header::value::HeaderValue

source§

impl Hash for http::method::Method

source§

impl Hash for http::status::StatusCode

source§

impl Hash for http::uri::authority::Authority

Case-insensitive hashing

§Examples


let a: Authority = "HELLO.com".parse().unwrap();
let b: Authority = "hello.coM".parse().unwrap();

let mut s = DefaultHasher::new();
a.hash(&mut s);
let a = s.finish();

let mut s = DefaultHasher::new();
b.hash(&mut s);
let b = s.finish();

assert_eq!(a, b);
source§

impl Hash for http::uri::path::PathAndQuery

source§

impl Hash for http::uri::scheme::Scheme

Case-insensitive hashing

source§

impl Hash for http::uri::Uri

source§

impl Hash for http::version::Version

source§

impl Hash for Mime

source§

impl Hash for Number

source§

impl Hash for Date

source§

impl Hash for time::duration::Duration

source§

impl Hash for ComponentRange

source§

impl Hash for time::instant::Instant

source§

impl Hash for OffsetDateTime

source§

impl Hash for PrimitiveDateTime

source§

impl Hash for Time

source§

impl Hash for UtcOffset

source§

impl Hash for AnyDelimiterCodec

source§

impl Hash for BytesCodec

source§

impl Hash for LinesCodec

source§

impl Hash for tokio::net::unix::ucred::UCred

source§

impl Hash for SignalKind

source§

impl Hash for tokio::time::instant::Instant

source§

impl Hash for ATerm

source§

impl Hash for B0

source§

impl Hash for B1

source§

impl Hash for Z0

source§

impl Hash for Equal

source§

impl Hash for Greater

source§

impl Hash for Less

source§

impl Hash for UTerm

source§

impl Hash for Timestamp

source§

impl Hash for Condition

source§

impl Hash for Style

§

impl Hash for Access

§

impl Hash for AtFlags

§

impl Hash for Authority

Case-insensitive hashing

§Examples


let a: Authority = "HELLO.com".parse().unwrap();
let b: Authority = "hello.coM".parse().unwrap();

let mut s = DefaultHasher::new();
a.hash(&mut s);
let a = s.finish();

let mut s = DefaultHasher::new();
b.hash(&mut s);
let b = s.finish();

assert_eq!(a, b);
§

impl Hash for BStr

§

impl Hash for BigEndian

§

impl Hash for ByteBuf

§

impl Hash for Bytes

§

impl Hash for Certificate

§

impl Hash for CreateFlags

§

impl Hash for Decor

§

impl Hash for Direction

§

impl Hash for DnsName

§

impl Hash for DnsName

§

impl Hash for DupFlags

§

impl Hash for Encoding

§

impl Hash for Errno

§

impl Hash for Error

§

impl Hash for ErrorKind

§

impl Hash for Expiration

§

impl Hash for FallocateFlags

§

impl Hash for FdFlags

§

impl Hash for Field

§

impl Hash for Gid

§

impl Hash for HeaderName

§

impl Hash for HeaderValue

§

impl Hash for HttpDate

§

impl Hash for Id

§

impl Hash for Identifier

§

impl Hash for InlinableString

§

impl Hash for InlineString

§

impl Hash for InternalString

§

impl Hash for IpAddr

§

impl Hash for Key

§

impl Hash for Level

§

impl Hash for LevelFilter

§

impl Hash for LittleEndian

§

impl Hash for MemfdFlags

§

impl Hash for Method

§

impl Hash for Mode

§

impl Hash for MountFlags

§

impl Hash for MountPropagationFlags

§

impl Hash for OFlags

§

impl Hash for ObjectIdentifier

§

impl Hash for Opcode

§

impl Hash for PathAndQuery

§

impl Hash for PollNext

§

impl Hash for RawString

§

impl Hash for ReadWriteFlags

§

impl Hash for ReasonPhrase

§

impl Hash for RenameFlags

§

impl Hash for Repr

§

impl Hash for ResolveFlags

§

impl Hash for Scheme

Case-insensitive hashing

§

impl Hash for SealFlags

§

impl Hash for ServerName

§

impl Hash for SigId

§

impl Hash for SockAddr

§

impl Hash for Span

§

impl Hash for StatVfsMountFlags

§

impl Hash for StatusCode

§

impl Hash for StatxFlags

§

impl Hash for Token

§

impl Hash for TomlError

§

impl Hash for Uid

§

impl Hash for UnmountFlags

§

impl Hash for Uri

§

impl Hash for Version

§

impl Hash for WatchFlags

§

impl Hash for XattrFlags

§

impl Hash for fsconfig_command

§

impl Hash for membarrier_cmd

§

impl Hash for membarrier_cmd_flag

source§

impl<'a> Hash for Component<'a>

source§

impl<'a> Hash for Prefix<'a>

§

impl<'a> Hash for Oid<'a>

1.10.0 · source§

impl<'a> Hash for Location<'a>

source§

impl<'a> Hash for Metadata<'a>

source§

impl<'a> Hash for MetadataBuilder<'a>

source§

impl<'a> Hash for mime::Name<'a>

§

impl<'a> Hash for Bytes<'a>

§

impl<'a> Hash for DnsNameRef<'a>

§

impl<'a> Hash for Span<'a>

§

impl<'h> Hash for Header<'h>

§

impl<'k> Hash for KeyMut<'k>

§

impl<A> Hash for SmallVec<A>
where A: Array, <A as Array>::Item: Hash,

source§

impl<A, B> Hash for figment::value::magic::Either<A, B>
where A: Hash, B: Hash,

source§

impl<B> Hash for Cow<'_, B>
where B: Hash + ToOwned + ?Sized,

1.55.0 · source§

impl<B, C> Hash for ControlFlow<B, C>
where B: Hash, C: Hash,

source§

impl<Dyn> Hash for DynMetadata<Dyn>
where Dyn: ?Sized,

1.4.0 · source§

impl<F> Hash for F
where F: FnPtr,

source§

impl<Idx> Hash for Range<Idx>
where Idx: Hash,

source§

impl<Idx> Hash for RangeFrom<Idx>
where Idx: Hash,

1.26.0 · source§

impl<Idx> Hash for RangeInclusive<Idx>
where Idx: Hash,

source§

impl<Idx> Hash for RangeTo<Idx>
where Idx: Hash,

1.26.0 · source§

impl<Idx> Hash for RangeToInclusive<Idx>
where Idx: Hash,

source§

impl<K, V> Hash for indexmap::map::slice::Slice<K, V>
where K: Hash, V: Hash,

source§

impl<K, V, A> Hash for BTreeMap<K, V, A>
where K: Hash, V: Hash, A: Allocator + Clone,

source§

impl<L, R> Hash for either::Either<L, R>
where L: Hash, R: Hash,

1.41.0 · source§

impl<Ptr> Hash for Pin<Ptr>
where Ptr: Deref, <Ptr as Deref>::Target: Hash,

source§

impl<S: Hash, E: Hash, F: Hash> Hash for Outcome<S, E, F>

§

impl<Storage> Hash for __BindgenBitfieldUnit<Storage>
where Storage: Hash,

1.17.0 · source§

impl<T> Hash for Bound<T>
where T: Hash,

source§

impl<T> Hash for Option<T>
where T: Hash,

1.36.0 · source§

impl<T> Hash for Poll<T>
where T: Hash,

source§

impl<T> Hash for *const T
where T: ?Sized,

source§

impl<T> Hash for *mut T
where T: ?Sized,

source§

impl<T> Hash for &T
where T: Hash + ?Sized,

source§

impl<T> Hash for &mut T
where T: Hash + ?Sized,

source§

impl<T> Hash for [T]
where T: Hash,

source§

impl<T> Hash for (T₁, T₂, …, Tₙ)
where T: Hash + ?Sized,

This trait is implemented for tuples up to twelve items long.

1.19.0 · source§

impl<T> Hash for Reverse<T>
where T: Hash,

1.21.0 · source§

impl<T> Hash for Discriminant<T>

1.20.0 · source§

impl<T> Hash for ManuallyDrop<T>
where T: Hash + ?Sized,

source§

impl<T> Hash for PhantomData<T>
where T: ?Sized,

1.74.0 · source§

impl<T> Hash for Saturating<T>
where T: Hash,

source§

impl<T> Hash for Wrapping<T>
where T: Hash,

1.25.0 · source§

impl<T> Hash for NonNull<T>
where T: ?Sized,

source§

impl<T> Hash for indexmap::set::slice::Slice<T>
where T: Hash,

§

impl<T> Hash for AllowStdIo<T>
where T: Hash,

§

impl<T> Hash for Formatted<T>
where T: Hash,

§

impl<T> Hash for Spanned<T>
where T: Hash,

§

impl<T> Hash for Unalign<T>
where T: Unaligned + Hash,

source§

impl<T, A> Hash for rocket::mtls::oid::asn1_rs::nom::lib::std::boxed::Box<T, A>
where T: Hash + ?Sized, A: Allocator,

source§

impl<T, A> Hash for BTreeSet<T, A>
where T: Hash, A: Allocator + Clone,

source§

impl<T, A> Hash for LinkedList<T, A>
where T: Hash, A: Allocator,

source§

impl<T, A> Hash for VecDeque<T, A>
where T: Hash, A: Allocator,

source§

impl<T, A> Hash for rocket::mtls::oid::asn1_rs::nom::lib::std::vec::Vec<T, A>
where T: Hash, A: Allocator,

The hash of a vector is the same as that of the corresponding slice, as required by the core::borrow::Borrow implementation.

use std::hash::BuildHasher;

let b = std::hash::RandomState::new();
let v: Vec<u8> = vec![0xa8, 0x3c, 0x09];
let s: &[u8] = &[0xa8, 0x3c, 0x09];
assert_eq!(b.hash_one(v), b.hash_one(s));
source§

impl<T, A> Hash for Rc<T, A>
where T: Hash + ?Sized, A: Allocator,

source§

impl<T, A> Hash for Arc<T, A>
where T: Hash + ?Sized, A: Allocator,

§

impl<T, A> Hash for Box<T, A>
where T: Hash + ?Sized, A: Allocator,

§

impl<T, A> Hash for Vec<T, A>
where T: Hash, A: Allocator,

The hash of a vector is the same as that of the corresponding slice, as required by the core::borrow::Borrow implementation.

#![feature(build_hasher_simple_hash_one)]
use std::hash::BuildHasher;

let b = std::collections::hash_map::RandomState::new();
let v: Vec<u8> = vec![0xa8, 0x3c, 0x09];
let s: &[u8] = &[0xa8, 0x3c, 0x09];
assert_eq!(b.hash_one(v), b.hash_one(s));
source§

impl<T, E> Hash for Result<T, E>
where T: Hash, E: Hash,

§

impl<T, N> Hash for GenericArray<T, N>
where T: Hash, N: ArrayLength<T>,

source§

impl<T, const N: usize> Hash for [T; N]
where T: Hash,

The hash of an array is the same as that of the corresponding slice, as required by the Borrow implementation.

use std::hash::BuildHasher;

let b = std::hash::RandomState::new();
let a: [u8; 3] = [0xa8, 0x3c, 0x09];
let s: &[u8] = &[0xa8, 0x3c, 0x09];
assert_eq!(b.hash_one(a), b.hash_one(s));
source§

impl<T, const N: usize> Hash for Simd<T, N>

source§

impl<T: Hash + Send + Sync + 'static> Hash for State<T>

source§

impl<T: Hash> Hash for Lenient<T>

source§

impl<T: Hash> Hash for Json<T>

Available on crate feature json only.
source§

impl<T: Hash> Hash for MsgPack<T>

Available on crate feature msgpack only.
source§

impl<U> Hash for NInt<U>
where U: Hash + Unsigned + NonZero,

source§

impl<U> Hash for PInt<U>
where U: Hash + Unsigned + NonZero,

source§

impl<U, B> Hash for UInt<U, B>
where U: Hash, B: Hash,

source§

impl<V, A> Hash for TArr<V, A>
where V: Hash, A: Hash,

source§

impl<Y, R> Hash for CoroutineState<Y, R>
where Y: Hash, R: Hash,

§

impl<const MIN: i8, const MAX: i8> Hash for OptionRangedI8<MIN, MAX>

§

impl<const MIN: i8, const MAX: i8> Hash for RangedI8<MIN, MAX>

§

impl<const MIN: i16, const MAX: i16> Hash for OptionRangedI16<MIN, MAX>

§

impl<const MIN: i16, const MAX: i16> Hash for RangedI16<MIN, MAX>

§

impl<const MIN: i32, const MAX: i32> Hash for OptionRangedI32<MIN, MAX>

§

impl<const MIN: i32, const MAX: i32> Hash for RangedI32<MIN, MAX>

§

impl<const MIN: i64, const MAX: i64> Hash for OptionRangedI64<MIN, MAX>

§

impl<const MIN: i64, const MAX: i64> Hash for RangedI64<MIN, MAX>

§

impl<const MIN: i128, const MAX: i128> Hash for OptionRangedI128<MIN, MAX>

§

impl<const MIN: i128, const MAX: i128> Hash for RangedI128<MIN, MAX>

§

impl<const MIN: isize, const MAX: isize> Hash for OptionRangedIsize<MIN, MAX>

§

impl<const MIN: isize, const MAX: isize> Hash for RangedIsize<MIN, MAX>

§

impl<const MIN: u8, const MAX: u8> Hash for OptionRangedU8<MIN, MAX>

§

impl<const MIN: u8, const MAX: u8> Hash for RangedU8<MIN, MAX>

§

impl<const MIN: u16, const MAX: u16> Hash for OptionRangedU16<MIN, MAX>

§

impl<const MIN: u16, const MAX: u16> Hash for RangedU16<MIN, MAX>

§

impl<const MIN: u32, const MAX: u32> Hash for OptionRangedU32<MIN, MAX>

§

impl<const MIN: u32, const MAX: u32> Hash for RangedU32<MIN, MAX>

§

impl<const MIN: u64, const MAX: u64> Hash for OptionRangedU64<MIN, MAX>

§

impl<const MIN: u64, const MAX: u64> Hash for RangedU64<MIN, MAX>

§

impl<const MIN: u128, const MAX: u128> Hash for OptionRangedU128<MIN, MAX>

§

impl<const MIN: u128, const MAX: u128> Hash for RangedU128<MIN, MAX>

§

impl<const MIN: usize, const MAX: usize> Hash for OptionRangedUsize<MIN, MAX>

§

impl<const MIN: usize, const MAX: usize> Hash for RangedUsize<MIN, MAX>

§

impl<const SIZE: usize> Hash for WriteBuffer<SIZE>