Trait consprob_trained::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 { ... }
}
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)].

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§

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

Feeds this value into the given Hasher.

Examples
use std::collections::hash_map::DefaultHasher;
use std::hash::{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::collections::hash_map::DefaultHasher;
use std::hash::{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());

Implementors§

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impl Hash for AsciiChar

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impl Hash for core::cmp::Ordering

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impl Hash for Infallible

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impl Hash for Which

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impl Hash for IpAddr

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impl Hash for Ipv6MulticastScope

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impl Hash for SocketAddr

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

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impl Hash for ErrorKind

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impl Hash for bio::alignment::poa::AlignmentOperation

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impl Hash for BackwardSearchResult

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impl Hash for SuperblockRank

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impl Hash for GffType

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impl Hash for bio::pattern_matching::pssm::errors::Error

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impl Hash for bio::stats::hmm::errors::Error

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impl Hash for TAffine

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impl Hash for TGeneral

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impl Hash for TProjective

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impl Hash for SliceInfoElem

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impl Hash for Sign

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impl Hash for Direction

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impl Hash for bool

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impl Hash for char

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impl Hash for i8

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impl Hash for i16

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impl Hash for i32

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impl Hash for i64

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impl Hash for i128

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impl Hash for isize

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impl Hash for !

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impl Hash for str

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impl Hash for u8

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impl Hash for u16

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impl Hash for u32

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impl Hash for u64

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impl Hash for u128

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impl Hash for ()

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impl Hash for usize

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impl Hash for CString

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impl Hash for String

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impl Hash for Layout

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impl Hash for TypeId

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impl Hash for CStr

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impl Hash for core::fmt::Error

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impl Hash for PhantomPinned

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impl Hash for Ipv4Addr

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impl Hash for Ipv6Addr

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impl Hash for SocketAddrV4

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impl Hash for SocketAddrV6

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impl Hash for NonZeroI8

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impl Hash for NonZeroI16

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impl Hash for NonZeroI32

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impl Hash for NonZeroI64

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impl Hash for NonZeroI128

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impl Hash for NonZeroIsize

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impl Hash for NonZeroU8

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impl Hash for NonZeroU16

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impl Hash for NonZeroU32

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impl Hash for NonZeroU64

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impl Hash for NonZeroU128

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impl Hash for NonZeroUsize

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impl Hash for RangeFull

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impl Hash for core::ptr::alignment::Alignment

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impl Hash for Duration

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impl Hash for OsStr

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impl Hash for OsString

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impl Hash for FileType

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impl Hash for UCred

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impl Hash for PathBuf

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impl Hash for PrefixComponent<'_>

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impl Hash for ThreadId

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impl Hash for Instant

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impl Hash for SystemTime

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impl Hash for MatchParams

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impl Hash for TracebackCell

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impl Hash for bio::alignment::poa::Alignment

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impl Hash for SparseAlignmentResult

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impl Hash for Alphabet

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impl Hash for RankTransform

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impl Hash for MaxOp

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impl Hash for SumOp

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impl Hash for BitEnc

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impl Hash for Occ

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impl Hash for BiInterval

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impl Hash for bio::data_structures::fmindex::Interval

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impl Hash for ExactMatch

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impl Hash for bio::data_structures::qgram_index::Interval

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impl Hash for bio::data_structures::qgram_index::Match

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impl Hash for QGramIndex

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impl Hash for RankSelect

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impl Hash for WaveletMatrix

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impl Hash for bio::io::bed::Record

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impl Hash for bio::io::fastq::Record

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impl Hash for BNDM

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impl Hash for BOM

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impl Hash for ShiftAnd

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impl Hash for Finder

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impl Hash for Orf

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impl Hash for State

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impl Hash for StateIter

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impl Hash for StateTransition

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impl Hash for StateTransitionIter

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impl Hash for FixedBitSet

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impl Hash for IxDynImpl

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impl Hash for Slice

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impl Hash for BigInt

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impl Hash for BigUint

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impl Hash for Time

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impl Hash for ATerm

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impl Hash for B0

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impl Hash for B1

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impl Hash for Z0

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impl Hash for Equal

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impl Hash for Greater

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impl Hash for Less

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impl Hash for UTerm

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impl Hash for Axis

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impl Hash for Path

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impl Hash for consprob_trained::Record

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impl Hash for Sequence

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impl Hash for AlignmentOperation

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impl Hash for BigEndian

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impl Hash for CheckedCastError

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impl Hash for Interval

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impl Hash for Kind

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impl Hash for LittleEndian

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impl Hash for Locus

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impl Hash for Match

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impl Hash for NoStrand

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impl Hash for ParseError

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impl Hash for PatternID

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impl Hash for PodCastError

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impl Hash for ReqStrand

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impl Hash for Span

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impl Hash for StateID

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

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

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

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impl<'a> Hash for BitEncIter<'a>

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impl<'a> Hash for bio::pattern_matching::bndm::Matches<'a>

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impl<'a> Hash for bio::pattern_matching::bom::Matches<'a>

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impl<'a> Hash for Horspool<'a>

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impl<'a> Hash for bio::pattern_matching::horspool::Matches<'a>

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impl<'a> Hash for KMP<'a>

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impl<'a, Block> Hash for BitSlice<'a, Block>where Block: BlockType + Hash,

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impl<'a, Block> Hash for BitSliceMut<'a, Block>where Block: BlockType + Hash,

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impl<'a, C, T> Hash for QGrams<'a, C, T>where C: Hash + Borrow<u8>, T: Hash + Iterator<Item = C>,

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impl<'a, N, D> Hash for bio::data_structures::interval_tree::avl_interval_tree::Entry<'a, N, D>where N: Hash + Ord + Clone, D: Hash,

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impl<'a, N, D> Hash for EntryMut<'a, N, D>where N: Hash + Ord + Clone, D: Hash,

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impl<'a, N, D> Hash for IntervalTreeIterator<'a, N, D>where N: Hash + Ord + Clone, D: Hash,

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impl<'a, N, D> Hash for IntervalTreeIteratorMut<'a, N, D>where N: Hash + Ord + Clone, D: Hash,

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impl<'a, R, T> Hash for AnnotMapIterator<'a, R, T>where R: Hash + Eq, T: Hash,

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impl<'a, R, T> Hash for bio::data_structures::annot_map::Entry<'a, R, T>where R: Hash + Eq, T: Hash,

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impl<'b, T> Hash for Ptr<'b, T>

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impl<A, B> Hash for EitherOrBoth<A, B>where A: Hash, B: Hash,

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

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impl<B> Hash for bio::io::fastq::Reader<B>where B: Hash,

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impl<B> Hash for bit_vec::BitVec<B>where B: BitBlock,

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impl<B> Hash for consprob_trained::Reader<B>where B: Hash,

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impl<B> Hash for consprob_trained::Records<B>where B: Hash + BufRead,

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impl<B> Hash for BitSet<B>where B: BitBlock,

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

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impl<Block> Hash for bv::bit_vec::BitVec<Block>where Block: BlockType + Hash,

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impl<DBWT, DLess, DOcc> Hash for FMDIndex<DBWT, DLess, DOcc>where DBWT: Hash + Borrow<Vec<u8, Global>>, DLess: Hash + Borrow<Vec<usize, Global>>, DOcc: Hash + Borrow<Occ>,

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impl<DBWT, DLess, DOcc> Hash for FMIndex<DBWT, DLess, DOcc>where DBWT: Hash + Borrow<Vec<u8, Global>>, DLess: Hash + Borrow<Vec<usize, Global>>, DOcc: Hash + Borrow<Occ>,

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

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impl<F> Hash for bio::alignment::pairwise::banded::Aligner<F>where F: Hash + MatchFunc,

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impl<F> Hash for bio::alignment::pairwise::Aligner<F>where F: Hash + MatchFunc,

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impl<F> Hash for Scoring<F>where F: Hash + MatchFunc,

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impl<F> Hash for Ukkonen<F>where F: Hash + Fn(u8, u8) -> u32,

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impl<F> Hash for Fwhere F: FnPtr,

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impl<F, B> Hash for SmallInts<F, B>where F: Hash + Integer + Bounded + NumCast + Copy, B: Hash + Integer + NumCast + Copy,

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impl<I> Hash for Dim<I>where I: Hash + ?Sized,

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

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

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

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

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

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impl<Ix> Hash for petgraph::adj::EdgeIndex<Ix>where Ix: Hash + IndexType,

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impl<Ix> Hash for petgraph::graph_impl::EdgeIndex<Ix>where Ix: Hash,

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impl<Ix> Hash for NodeIndex<Ix>where Ix: Hash,

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impl<K, V> Hash for EnumMap<K, V>where K: Enum<V>, V: Hash,

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

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impl<L, Pr, Po, Payload> Hash for Model<L, Pr, Po, Payload>where L: Hash + Likelihood<Payload>, Pr: Hash + Prior, Po: Hash + Posterior, Payload: Hash + Default,

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

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impl<N> Hash for consprob_trained::Interval<N>where N: Hash + Ord + Clone,

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impl<N, D> Hash for ArrayBackedIntervalTree<N, D>where N: Hash + Ord + Clone + Copy, D: Hash,

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impl<N, D> Hash for IntervalTree<N, D>where N: Hash + Ord + Clone, D: Hash,

1.41.0 · source§

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

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impl<R> Hash for bio::io::fastq::Records<R>where R: Hash + Read,

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impl<R, S> Hash for Contig<R, S>where R: Hash, S: Hash,

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impl<R, S> Hash for Pos<R, S>where R: Hash, S: Hash,

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impl<R, S> Hash for Spliced<R, S>where R: Hash, S: Hash,

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impl<S, D> Hash for ArrayBase<S, D>where D: Dimension, S: Data, <S as RawData>::Elem: Hash,

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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impl<T> Hash for Discriminant<T>

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

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

1.25.0 · source§

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

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impl<T> Hash for bio::pattern_matching::myers::long::Myers<T>where T: Hash + BitVec,

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impl<T> Hash for bio::pattern_matching::myers::simple::Myers<T>where T: Hash + BitVec, <T as BitVec>::DistType: Hash,

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impl<T> Hash for IJKW<T>where T: Hash + Scalar,

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impl<T> Hash for M2x2<T>where T: Hash + Scalar,

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impl<T> Hash for M2x3<T>where T: Hash + Scalar,

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impl<T> Hash for M2x4<T>where T: Hash + Scalar,

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impl<T> Hash for M2x5<T>where T: Hash + Scalar,

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impl<T> Hash for M2x6<T>where T: Hash + Scalar,

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impl<T> Hash for M3x2<T>where T: Hash + Scalar,

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impl<T> Hash for M3x3<T>where T: Hash + Scalar,

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impl<T> Hash for M3x4<T>where T: Hash + Scalar,

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impl<T> Hash for M3x5<T>where T: Hash + Scalar,

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impl<T> Hash for M3x6<T>where T: Hash + Scalar,

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impl<T> Hash for M4x2<T>where T: Hash + Scalar,

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impl<T> Hash for M4x3<T>where T: Hash + Scalar,

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impl<T> Hash for M4x4<T>where T: Hash + Scalar,

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impl<T> Hash for M4x5<T>where T: Hash + Scalar,

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impl<T> Hash for M4x6<T>where T: Hash + Scalar,

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impl<T> Hash for M5x2<T>where T: Hash + Scalar,

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impl<T> Hash for M5x3<T>where T: Hash + Scalar,

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impl<T> Hash for M5x4<T>where T: Hash + Scalar,

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impl<T> Hash for M5x5<T>where T: Hash + Scalar,

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impl<T> Hash for M5x6<T>where T: Hash + Scalar,

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impl<T> Hash for M6x2<T>where T: Hash + Scalar,

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impl<T> Hash for M6x3<T>where T: Hash + Scalar,

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impl<T> Hash for M6x4<T>where T: Hash + Scalar,

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impl<T> Hash for M6x5<T>where T: Hash + Scalar,

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impl<T> Hash for M6x6<T>where T: Hash + Scalar,

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impl<T> Hash for X<T>where T: Hash + Scalar,

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impl<T> Hash for XY<T>where T: Hash + Scalar,

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impl<T> Hash for XYZ<T>where T: Hash + Scalar,

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impl<T> Hash for XYZW<T>where T: Hash + Scalar,

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impl<T> Hash for XYZWA<T>where T: Hash + Scalar,

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impl<T> Hash for XYZWAB<T>where T: Hash + Scalar,

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

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impl<T> Hash for Quaternion<T>where T: Scalar + Hash,

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impl<T> Hash for num_complex::Complex<T>where T: Hash,

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impl<T> Hash for num_complex::Complex<T>where T: Hash,

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impl<T> Hash for num_rational::Ratio<T>where T: Clone + Integer + Hash,

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impl<T> Hash for num_rational::Ratio<T>where T: Clone + Integer + Hash,

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impl<T> Hash for NotNan<T>where T: Float,

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impl<T> Hash for OrderedFloat<T>where T: Float,

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

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

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

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

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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.

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));
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impl<T, C, const D: usize> Hash for Transform<T, C, D>where T: RealField + Hash, C: TCategory, Const<D>: DimNameAdd<Const<1>>, DefaultAllocator: Allocator<T, <Const<D> as DimNameAdd<Const<1>>>::Output, <Const<D> as DimNameAdd<Const<1>>>::Output>, <DefaultAllocator as Allocator<T, <Const<D> as DimNameAdd<Const<1>>>::Output, <Const<D> as DimNameAdd<Const<1>>>::Output>>::Buffer: Hash,

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impl<T, D> Hash for OPoint<T, D>where T: Scalar + Hash, D: DimName, DefaultAllocator: Allocator<T, D, Const<1>>,

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

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impl<T, Op> Hash for FenwickTree<T, Op>where T: Hash + Default + Ord, Op: Hash + PrefixOp<T>,

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impl<T, R, C, S> Hash for Matrix<T, R, C, S>where T: Scalar + Hash, R: Dim, C: Dim, S: RawStorage<T, R, C>,

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impl<T, R, const D: usize> Hash for Isometry<T, R, D>where T: Scalar + Hash, R: Hash, <DefaultAllocator as Allocator<T, Const<D>, Const<1>>>::Buffer: Hash,

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impl<T, R, const D: usize> Hash for Similarity<T, R, D>where T: Scalar + Hash, R: Hash, <DefaultAllocator as Allocator<T, Const<D>, Const<1>>>::Buffer: Hash,

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impl<T, const D: usize> Hash for Rotation<T, D>where T: Scalar + Hash, <DefaultAllocator as Allocator<T, Const<D>, Const<D>>>::Buffer: Hash,

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impl<T, const D: usize> Hash for Translation<T, D>where T: Scalar + Hash, <DefaultAllocator as Allocator<T, Const<D>, Const<1>>>::Buffer: Hash,

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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::collections::hash_map::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));
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impl<T, const N: usize> Hash for Simd<T, N>where LaneCount<N>: SupportedLaneCount, T: SimdElement + Hash,

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impl<T, const R: usize, const C: usize> Hash for ArrayStorage<T, R, C>where T: Hash,

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

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

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

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impl<V> Hash for VecMap<V>where V: Hash,

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

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

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impl<const R: usize> Hash for Const<R>