1.7.0[−][src]Struct core::hash::BuildHasherDefault  
Used to create a default BuildHasher instance for types that implement
Hasher and Default.
BuildHasherDefault<H> can be used when a type H implements Hasher and
Default, and you need a corresponding BuildHasher instance, but none is
defined.
Any BuildHasherDefault is zero-sized. It can be created with
default. When using BuildHasherDefault with HashMap or
HashSet, this doesn't need to be done, since they implement appropriate
Default instances themselves.
Examples
Using BuildHasherDefault to specify a custom BuildHasher for
HashMap:
use std::collections::HashMap; use std::hash::{BuildHasherDefault, Hasher}; #[derive(Default)] struct MyHasher; impl Hasher for MyHasher { fn write(&mut self, bytes: &[u8]) { // Your hashing algorithm goes here! unimplemented!() } fn finish(&self) -> u64 { // Your hashing algorithm goes here! unimplemented!() } } type MyBuildHasher = BuildHasherDefault<MyHasher>; let hash_map = HashMap::<u32, u32, MyBuildHasher>::default();Run
Trait Implementations
impl<H> Debug for BuildHasherDefault<H>1.9.0[src] 
impl<H> Debug for BuildHasherDefault<H>fn fmt(&self, f: &mut Formatter) -> Result[src] 
fn fmt(&self, f: &mut Formatter) -> ResultFormats the value using the given formatter. Read more
impl<H: Default + Hasher> BuildHasher for BuildHasherDefault<H>[src] 
impl<H: Default + Hasher> BuildHasher for BuildHasherDefault<H>type Hasher = H
Type of the hasher that will be created.
fn build_hasher(&self) -> H[src] 
fn build_hasher(&self) -> HCreates a new hasher. Read more
impl<H> Clone for BuildHasherDefault<H>[src] 
impl<H> Clone for BuildHasherDefault<H>fn clone(&self) -> BuildHasherDefault<H>[src] 
fn clone(&self) -> BuildHasherDefault<H>Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)1.0.0[src] 
fn clone_from(&mut self, source: &Self)Performs copy-assignment from source. Read more
impl<H> Default for BuildHasherDefault<H>[src] 
impl<H> Default for BuildHasherDefault<H>fn default() -> BuildHasherDefault<H>[src] 
fn default() -> BuildHasherDefault<H>Returns the "default value" for a type. Read more
impl<H> PartialEq for BuildHasherDefault<H>1.29.0[src] 
impl<H> PartialEq for BuildHasherDefault<H>fn eq(&self, _other: &BuildHasherDefault<H>) -> bool[src] 
fn eq(&self, _other: &BuildHasherDefault<H>) -> boolThis method tests for self and other values to be equal, and is used by ==. Read more
#[must_use]
fn ne(&self, other: &Rhs) -> bool1.0.0[src] 
#[must_use]
fn ne(&self, other: &Rhs) -> boolThis method tests for !=.
impl<H> Eq for BuildHasherDefault<H>1.29.0[src] 
impl<H> Eq for BuildHasherDefault<H>Auto Trait Implementations
impl<H> Send for BuildHasherDefault<H> where
    H: Send, 
impl<H> Send for BuildHasherDefault<H> where
    H: Send, impl<H> Sync for BuildHasherDefault<H> where
    H: Sync, 
impl<H> Sync for BuildHasherDefault<H> where
    H: Sync, Blanket Implementations
impl<T, U> Into for T where
    U: From<T>, [src] 
impl<T, U> Into for T where
    U: From<T>, impl<T> From for T[src] 
impl<T> From for Timpl<T, U> TryInto for T where
    U: TryFrom<T>, [src] 
impl<T, U> TryInto for T where
    U: TryFrom<T>, type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(Self) -> Result<U, <U as TryFrom<T>>::Error>[src] 
fn try_into(Self) -> Result<U, <U as TryFrom<T>>::Error>Performs the conversion.
impl<T, U> TryFrom for T where
    T: From<U>, [src] 
impl<T, U> TryFrom for T where
    T: From<U>, type Error = !
The type returned in the event of a conversion error.
fn try_from(U) -> Result<T, <T as TryFrom<U>>::Error>[src] 
fn try_from(U) -> Result<T, <T as TryFrom<U>>::Error>Performs the conversion.
impl<T> Borrow for T where
    T: ?Sized, [src] 
impl<T> Borrow for T where
    T: ?Sized, impl<T> BorrowMut for T where
    T: ?Sized, [src] 
impl<T> BorrowMut for T where
    T: ?Sized, fn borrow_mut(&mut Self) -> &mut T[src] 
fn borrow_mut(&mut Self) -> &mut TMutably borrows from an owned value. Read more
impl<T> Any for T where
    T: 'static + ?Sized, [src] 
impl<T> Any for T where
    T: 'static + ?Sized, fn get_type_id(&Self) -> TypeId[src] 
fn get_type_id(&Self) -> TypeId🔬 This is a nightly-only experimental API.  (get_type_id #27745)
this method will likely be replaced by an associated static
Gets the TypeId of self. Read more