Enum otter_api_tests::hash_map::RawEntryMut [−][src]
pub enum RawEntryMut<'a, K, V, S> where
S: 'a,
K: 'a,
V: 'a, { Occupied(RawOccupiedEntryMut<'a, K, V, S>), Vacant(RawVacantEntryMut<'a, K, V, S>), }
hash_raw_entry
)Expand description
A view into a single entry in a map, which may either be vacant or occupied.
This is a lower-level version of Entry
.
This enum
is constructed through the raw_entry_mut
method on HashMap
,
then calling one of the methods of that RawEntryBuilderMut
.
Variants
Occupied(RawOccupiedEntryMut<'a, K, V, S>)
hash_raw_entry
)An occupied entry.
Vacant(RawVacantEntryMut<'a, K, V, S>)
hash_raw_entry
)A vacant entry.
Implementations
pub fn or_insert(self, default_key: K, default_val: V) -> (&'a mut K, &'a mut V) where
S: BuildHasher,
K: Hash,
[src]🔬 This is a nightly-only experimental API. (hash_raw_entry
)
pub fn or_insert(self, default_key: K, default_val: V) -> (&'a mut K, &'a mut V) where
S: BuildHasher,
K: Hash,
[src]hash_raw_entry
)Ensures a value is in the entry by inserting the default if empty, and returns mutable references to the key and value in the entry.
Examples
#![feature(hash_raw_entry)] use std::collections::HashMap; let mut map: HashMap<&str, u32> = HashMap::new(); map.raw_entry_mut().from_key("poneyland").or_insert("poneyland", 3); assert_eq!(map["poneyland"], 3); *map.raw_entry_mut().from_key("poneyland").or_insert("poneyland", 10).1 *= 2; assert_eq!(map["poneyland"], 6);
pub fn or_insert_with<F>(self, default: F) -> (&'a mut K, &'a mut V) where
S: BuildHasher,
K: Hash,
F: FnOnce() -> (K, V),
[src]🔬 This is a nightly-only experimental API. (hash_raw_entry
)
pub fn or_insert_with<F>(self, default: F) -> (&'a mut K, &'a mut V) where
S: BuildHasher,
K: Hash,
F: FnOnce() -> (K, V),
[src]hash_raw_entry
)Ensures a value is in the entry by inserting the result of the default function if empty, and returns mutable references to the key and value in the entry.
Examples
#![feature(hash_raw_entry)] use std::collections::HashMap; let mut map: HashMap<&str, String> = HashMap::new(); map.raw_entry_mut().from_key("poneyland").or_insert_with(|| { ("poneyland", "hoho".to_string()) }); assert_eq!(map["poneyland"], "hoho".to_string());
🔬 This is a nightly-only experimental API. (hash_raw_entry
)
hash_raw_entry
)Provides in-place mutable access to an occupied entry before any potential inserts into the map.
Examples
#![feature(hash_raw_entry)] use std::collections::HashMap; let mut map: HashMap<&str, u32> = HashMap::new(); map.raw_entry_mut() .from_key("poneyland") .and_modify(|_k, v| { *v += 1 }) .or_insert("poneyland", 42); assert_eq!(map["poneyland"], 42); map.raw_entry_mut() .from_key("poneyland") .and_modify(|_k, v| { *v += 1 }) .or_insert("poneyland", 0); assert_eq!(map["poneyland"], 43);
Trait Implementations
Auto Trait Implementations
impl<'a, K, V, S> RefUnwindSafe for RawEntryMut<'a, K, V, S> where
K: RefUnwindSafe,
S: RefUnwindSafe,
V: RefUnwindSafe,
impl<'a, K, V, S> Send for RawEntryMut<'a, K, V, S> where
K: Send,
S: Sync,
V: Send,
impl<'a, K, V, S> Sync for RawEntryMut<'a, K, V, S> where
K: Sync,
S: Sync,
V: Sync,
impl<'a, K, V, S> Unpin for RawEntryMut<'a, K, V, S>
impl<'a, K, V, S> !UnwindSafe for RawEntryMut<'a, K, V, S>
Blanket Implementations
Mutably borrows from an owned value. Read more
pub fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>ⓘNotable traits for Box<R, Global>
impl<R> Read for Box<R, Global> where
R: Read + ?Sized, impl<W> Write for Box<W, Global> where
W: Write + ?Sized, impl<I, A> Iterator for Box<I, A> where
A: Allocator,
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F, A> Future for Box<F, A> where
A: Allocator + 'static,
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;
pub fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>ⓘNotable traits for Box<R, Global>
impl<R> Read for Box<R, Global> where
R: Read + ?Sized, impl<W> Write for Box<W, Global> where
W: Write + ?Sized, impl<I, A> Iterator for Box<I, A> where
A: Allocator,
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F, A> Future for Box<F, A> where
A: Allocator + 'static,
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;
Convert Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
. Read more
pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
Convert Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
. Read more
Convert &Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s. Read more
pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Convert &mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s. Read more
impl<A> DynCastExt for A
impl<A> DynCastExt for A
pub fn dyn_cast<T>(
self
) -> Result<<A as DynCastExtHelper<T>>::Target, <A as DynCastExtHelper<T>>::Source> where
T: ?Sized,
A: DynCastExtHelper<T>,
pub fn dyn_cast<T>(
self
) -> Result<<A as DynCastExtHelper<T>>::Target, <A as DynCastExtHelper<T>>::Source> where
T: ?Sized,
A: DynCastExtHelper<T>,
Use this to cast from one trait object type to another. Read more
pub fn dyn_upcast<T>(self) -> <A as DynCastExtAdvHelper<T, T>>::Target where
T: ?Sized,
A: DynCastExtAdvHelper<T, T, Source = <A as DynCastExtAdvHelper<T, T>>::Target>,
pub fn dyn_upcast<T>(self) -> <A as DynCastExtAdvHelper<T, T>>::Target where
T: ?Sized,
A: DynCastExtAdvHelper<T, T, Source = <A as DynCastExtAdvHelper<T, T>>::Target>,
Use this to upcast a trait to one of its supertraits. Read more
pub fn dyn_cast_adv<F, T>(
self
) -> Result<<A as DynCastExtAdvHelper<F, T>>::Target, <A as DynCastExtAdvHelper<F, T>>::Source> where
T: ?Sized,
A: DynCastExtAdvHelper<F, T>,
F: ?Sized,
pub fn dyn_cast_adv<F, T>(
self
) -> Result<<A as DynCastExtAdvHelper<F, T>>::Target, <A as DynCastExtAdvHelper<F, T>>::Source> where
T: ?Sized,
A: DynCastExtAdvHelper<F, T>,
F: ?Sized,
pub fn dyn_cast_with_config<C>(
self
) -> Result<<A as DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>>::Target, <A as DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>>::Source> where
C: DynCastConfig,
A: DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>,
pub fn dyn_cast_with_config<C>(
self
) -> Result<<A as DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>>::Target, <A as DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>>::Source> where
C: DynCastConfig,
A: DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>,
Use this to cast from one trait object type to another. With this method the type parameter is a config type that uniquely specifies which cast should be preformed. Read more
fn instrument(self, span: Span) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
[src]
fn instrument(self, span: Span) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
[src]Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
fn in_current_span(self) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
[src]
fn in_current_span(self) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
[src]pub fn vzip(self) -> V