Struct skipdb::ReadTransaction

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pub struct ReadTransaction<K, V, I, C> { /* private fields */ }
Expand description

A read only transaction over the [OptimisticDb],

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impl<K, V, I, C> ReadTransaction<K, V, I, C>
where K: Ord, I: Database<K, V>,

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pub fn version(&self) -> u64

Returns the version of the transaction.

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pub fn get<Q>(&self, key: &Q) -> Option<Ref<'_, K, V>>
where K: Borrow<Q>, Q: Ord + ?Sized,

Get a value from the database.

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pub fn contains_key<Q>(&self, key: &Q) -> bool
where K: Borrow<Q>, Q: Ord + ?Sized,

Returns true if the given key exists in the database.

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pub fn iter(&self) -> Iter<'_, K, V>

Returns an iterator over the entries of the database.

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pub fn iter_rev(&self) -> RevIter<'_, K, V>

Returns a reverse iterator over the entries of the database.

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pub fn range<Q, R>(&self, range: R) -> Range<'_, Q, R, K, V>
where K: Borrow<Q>, R: RangeBounds<Q>, Q: Ord + ?Sized,

Returns an iterator over the subset of entries of the database.

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pub fn range_rev<Q, R>(&self, range: R) -> RevRange<'_, Q, R, K, V>
where K: Borrow<Q>, R: RangeBounds<Q>, Q: Ord + ?Sized,

Returns an iterator over the subset of entries of the database in reverse order.

Auto Trait Implementations§

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impl<K, V, I, C> Freeze for ReadTransaction<K, V, I, C>
where I: Freeze,

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impl<K, V, I, C> !RefUnwindSafe for ReadTransaction<K, V, I, C>

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impl<K, V, I, C> Send for ReadTransaction<K, V, I, C>
where I: Send, K: Send, V: Send, C: Send,

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impl<K, V, I, C> Sync for ReadTransaction<K, V, I, C>
where I: Sync, K: Sync, V: Sync, C: Send,

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impl<K, V, I, C> Unpin for ReadTransaction<K, V, I, C>
where I: Unpin, K: Unpin, V: Unpin,

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impl<K, V, I, C> !UnwindSafe for ReadTransaction<K, V, I, C>

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,

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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,

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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

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.