Enum dashmap::try_result::TryResult

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pub enum TryResult<R> {
    Present(R),
    Absent,
    Locked,
}

Expand description

Represents the result of a non-blocking read from a DashMap.

Variants

`Present(R)`

The value was present in the map, and the lock for the shard was successfully obtained.

`Absent`

The shard wasn’t locked, and the value wasn’t present in the map.

`Locked`

The shard was locked.

Implementations

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impl<R> TryResult<R>

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pub fn is_present(&self) -> bool

Returns true if the value was present in the map, and the lock for the shard was successfully obtained.

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pub fn is_absent(&self) -> bool

Returns true if the shard wasn’t locked, and the value wasn’t present in the map.

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pub fn is_locked(&self) -> bool

Returns true if the shard was locked.

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pub fn unwrap(self) -> R

If self is Present, returns the reference to the value in the map. Panics if self is not Present.

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pub fn try_unwrap(self) -> Option<R>

If self is Present, returns the reference to the value in the map. If self is not Present, returns None.

Trait Implementations

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impl<R: Debug> Debug for TryResult<R>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl<R> RefUnwindSafe for TryResult<R> where
R: RefUnwindSafe,

impl<R> Send for TryResult<R> where
R: Send,

impl<R> Sync for TryResult<R> where
R: Sync,

impl<R> Unpin for TryResult<R> where
R: Unpin,

impl<R> UnwindSafe for TryResult<R> where
R: UnwindSafe,

Blanket Implementations

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impl<T> Any for T where
T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::<T>()

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Enum dashmap::try_result::TryResult

Variants

Present(R)

Absent

Locked

Implementations

impl<R> TryResult<R>

pub fn is_present(&self) -> bool

pub fn is_absent(&self) -> bool

pub fn is_locked(&self) -> bool

pub fn unwrap(self) -> R

pub fn try_unwrap(self) -> Option<R>

Trait Implementations

impl<R: Debug> Debug for TryResult<R>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Auto Trait Implementations

impl<R> RefUnwindSafe for TryResult<R> where R: RefUnwindSafe,

impl<R> Send for TryResult<R> where R: Send,

impl<R> Sync for TryResult<R> where R: Sync,

impl<R> Unpin for TryResult<R> where R: Unpin,

impl<R> UnwindSafe for TryResult<R> where R: UnwindSafe,

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for T where U: From<T>,

fn into(self) -> U

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::<T>()

type Init = T

unsafe fn init(init: <T as Pointable>::Init) -> usize

unsafe fn deref<'a>(ptr: usize) -> &'a T

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

unsafe fn drop(ptr: usize)

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

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

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

`Present(R)`

`Absent`

`Locked`

impl<R> RefUnwindSafe for TryResult<R> where
R: RefUnwindSafe,

impl<R> Send for TryResult<R> where
R: Send,

impl<R> Sync for TryResult<R> where
R: Sync,

impl<R> Unpin for TryResult<R> where
R: Unpin,

impl<R> UnwindSafe for TryResult<R> where
R: UnwindSafe,

impl<T> Any for T where
T: 'static + ?Sized,

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<T, U> Into<U> for T where
U: From<T>,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,