# 1.13.0[−][src]Struct std::collections::hash_map::DefaultHasher

    pub struct DefaultHasher(_);

The default `Hasher` used by `RandomState`.

The internal algorithm is not specified, and so it and its hashes should not be relied upon over releases.

## Implementations

### `impl DefaultHasher`[src]

#### `pub fn new() -> DefaultHasher`[src]

Creates a new `DefaultHasher`.

This hasher is not guaranteed to be the same as all other `DefaultHasher` instances, but is the same as all other `DefaultHasher` instances created through `new` or `default`.

## Trait Implementations

### `impl Clone for DefaultHasher`[src]

#### `pub fn clone(&self) -> DefaultHasher`[src]

Returns a copy of the value. Read more

#### `pub fn clone_from(&mut self, source: &Self)`1.0.0[src]

Performs copy-assignment from `source`. Read more

### `impl Debug for DefaultHasher`[src]

#### `pub fn fmt(&self, f: &mut Formatter<'_>) -> Result`[src]

Formats the value using the given formatter. Read more

### `impl Default for DefaultHasher`[src]

#### `pub fn default() -> DefaultHasher`[src]

Creates a new `DefaultHasher` using `new`. See its documentation for more.

### `impl Hasher for DefaultHasher`[src]

#### `pub fn write(&mut self, msg: &[u8])`[src]

Writes some data into this `Hasher`. Read more

#### `pub fn finish(&self) -> u64`[src]

Returns the hash value for the values written so far. Read more

#### `pub fn write_u8(&mut self, i: u8)`1.3.0[src]

Writes a single `u8` into this hasher.

#### `pub fn write_u16(&mut self, i: u16)`1.3.0[src]

Writes a single `u16` into this hasher.

#### `pub fn write_u32(&mut self, i: u32)`1.3.0[src]

Writes a single `u32` into this hasher.

#### `pub fn write_u64(&mut self, i: u64)`1.3.0[src]

Writes a single `u64` into this hasher.

#### `pub fn write_u128(&mut self, i: u128)`1.26.0[src]

Writes a single `u128` into this hasher.

#### `pub fn write_usize(&mut self, i: usize)`1.3.0[src]

Writes a single `usize` into this hasher.

#### `pub fn write_i8(&mut self, i: i8)`1.3.0[src]

Writes a single `i8` into this hasher.

#### `pub fn write_i16(&mut self, i: i16)`1.3.0[src]

Writes a single `i16` into this hasher.

#### `pub fn write_i32(&mut self, i: i32)`1.3.0[src]

Writes a single `i32` into this hasher.

#### `pub fn write_i64(&mut self, i: i64)`1.3.0[src]

Writes a single `i64` into this hasher.

#### `pub fn write_i128(&mut self, i: i128)`1.26.0[src]

Writes a single `i128` into this hasher.

#### `pub fn write_isize(&mut self, i: isize)`1.3.0[src]

Writes a single `isize` into this hasher.

## Auto Trait Implementations

### `impl RefUnwindSafe for DefaultHasher`

### `impl Send for DefaultHasher`

### `impl Sync for DefaultHasher`

### `impl Unpin for DefaultHasher`

### `impl UnwindSafe for DefaultHasher`

## Blanket Implementations

### `impl<T> Any for T where
T: 'static + ?Sized,` [src]

#### `pub fn type_id(&self) -> TypeId`[src]

Gets the `TypeId` of `self`. Read more

### `impl<T> Borrow<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow(&self) -> &Tⓘ

### Notable traits for &'_ mut F

`impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<R: Read + ?Sized, '_> Read for &'_ mut Rimpl<W: Write + ?Sized, '_> Write for &'_ mut W`
`[src]

Immutably borrows from an owned value. Read more

### `impl<T> BorrowMut<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow_mut(&mut self) -> &mut Tⓘ

### Notable traits for &'_ mut F

`impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<R: Read + ?Sized, '_> Read for &'_ mut Rimpl<W: Write + ?Sized, '_> Write for &'_ mut W`
`[src]

Mutably borrows from an owned value. Read more

### `impl<T> From<T> for T`[src]

#### `pub fn from(t: T) -> T`[src]

Performs the conversion.

### `impl<T, U> Into<U> for T where
U: From<T>,` [src]

#### `pub fn into(self) -> U`[src]

Performs the conversion.

### `impl<T> ToOwned for T where
T: Clone,` [src]

#### `type Owned = T`

The resulting type after obtaining ownership.

#### `pub fn to_owned(&self) -> T`[src]

Creates owned data from borrowed data, usually by cloning. Read more

#### `pub fn clone_into(&self, target: &mut T)`[src]

🔬 This is a nightly-only experimental API. (`toowned_clone_into` #41263)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

### `impl<T, U> TryFrom<U> for T where
U: Into<T>,` [src]

#### `type Error = Infallible`

The type returned in the event of a conversion error.

#### `pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>`[src]

Performs the conversion.

### `impl<T, U> TryInto<U> for T where
U: TryFrom<T>,` [src]

#### `type Error = <U as TryFrom<T>>::Error`

The type returned in the event of a conversion error.

#### `pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>`[src]

Performs the conversion.