Struct redb::MultimapTable

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pub struct MultimapTable<'db, 'txn, K: RedbKey + ?Sized, V: RedbKey + ?Sized> { /* private fields */ }

Expand description

A multimap table

Multimap tables may have multiple values associated with each key

Implementations

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impl<'db, 'txn, K: RedbKey + ?Sized, V: RedbKey + ?Sized> MultimapTable<'db, 'txn, K, V>

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pub fn insert(&mut self, key: &K, value: &V) -> Result<bool, Error>

Add the given value to the mapping of the key

Returns true if the key-value pair was present

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pub fn remove(&mut self, key: &K, value: &V) -> Result<bool, Error>

Removes the given key-value pair

Returns true if the key-value pair was present

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pub fn remove_all(&mut self, key: &K) -> Result<MultimapValueIter<'_, V>, Error>

Removes all values for the given key

Returns an iterator over the removed values

Trait Implementations

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impl<'db, 'txn, K: RedbKey + ?Sized, V: RedbKey + ?Sized> Drop for MultimapTable<'db, 'txn, K, V>

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fn drop(&mut self)

Executes the destructor for this type. Read more

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impl<'db, 'txn, K: RedbKey + ?Sized, V: RedbKey + ?Sized> ReadableMultimapTable<K, V> for MultimapTable<'db, 'txn, K, V>

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fn get<'a>(&'a self, key: &'a K) -> Result<MultimapValueIter<'a, V>, Error>

Returns an iterator over all values for the given key

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fn range<'a, T: RangeBounds<&'a K> + 'a>(
&'a self,
range: T
) -> Result<MultimapRangeIter<'a, K, V>, Error>

Returns a double-ended iterator over a range of elements in the table

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fn len(&self) -> Result<usize, Error>

Returns the number of key-value pairs in the table

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fn is_empty(&self) -> Result<bool, Error>

Returns true if the table is empty

Auto Trait Implementations

impl<'db, 'txn, K, V> !RefUnwindSafe for MultimapTable<'db, 'txn, K, V>

impl<'db, 'txn, K, V> !Send for MultimapTable<'db, 'txn, K, V>

impl<'db, 'txn, K, V> !Sync for MultimapTable<'db, 'txn, K, V>

impl<'db, 'txn, K: ?Sized, V: ?Sized> Unpin for MultimapTable<'db, 'txn, K, V> where
 K: Unpin,
 V: Unpin,
 'db: 'txn,

impl<'db, 'txn, K, V> !UnwindSafe for MultimapTable<'db, 'txn, K, V>

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.

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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.

Struct redb::MultimapTable

Implementations

impl<'db, 'txn, K: RedbKey + ?Sized, V: RedbKey + ?Sized> MultimapTable<'db, 'txn, K, V>

pub fn insert(&mut self, key: &K, value: &V) -> Result<bool, Error>

pub fn remove(&mut self, key: &K, value: &V) -> Result<bool, Error>

pub fn remove_all(&mut self, key: &K) -> Result<MultimapValueIter<'_, V>, Error>

Trait Implementations

impl<'db, 'txn, K: RedbKey + ?Sized, V: RedbKey + ?Sized> Drop for MultimapTable<'db, 'txn, K, V>

fn drop(&mut self)

impl<'db, 'txn, K: RedbKey + ?Sized, V: RedbKey + ?Sized> ReadableMultimapTable<K, V> for MultimapTable<'db, 'txn, K, V>

fn get<'a>(&'a self, key: &'a K) -> Result<MultimapValueIter<'a, V>, Error>

fn range<'a, T: RangeBounds<&'a K> + 'a>(
&'a self,
range: T
) -> Result<MultimapRangeIter<'a, K, V>, Error>

fn len(&self) -> Result<usize, Error>

fn is_empty(&self) -> Result<bool, Error>

Auto Trait Implementations

impl<'db, 'txn, K, V> !RefUnwindSafe for MultimapTable<'db, 'txn, K, V>

impl<'db, 'txn, K, V> !Send for MultimapTable<'db, 'txn, K, V>

impl<'db, 'txn, K, V> !Sync for MultimapTable<'db, 'txn, K, V>

impl<'db, 'txn, K: ?Sized, V: ?Sized> Unpin for MultimapTable<'db, 'txn, K, V> where
    K: Unpin,
    V: Unpin,
    'db: 'txn,

impl<'db, 'txn, K, V> !UnwindSafe for MultimapTable<'db, 'txn, K, V>

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, 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>

Struct redb::MultimapTable

Implementations

impl<'db, 'txn, K: RedbKey + ?Sized, V: RedbKey + ?Sized> MultimapTable<'db, 'txn, K, V>

pub fn insert(&mut self, key: &K, value: &V) -> Result<bool, Error>

pub fn remove(&mut self, key: &K, value: &V) -> Result<bool, Error>

pub fn remove_all(&mut self, key: &K) -> Result<MultimapValueIter<'_, V>, Error>

Trait Implementations

impl<'db, 'txn, K: RedbKey + ?Sized, V: RedbKey + ?Sized> Drop for MultimapTable<'db, 'txn, K, V>

fn drop(&mut self)

impl<'db, 'txn, K: RedbKey + ?Sized, V: RedbKey + ?Sized> ReadableMultimapTable<K, V> for MultimapTable<'db, 'txn, K, V>

fn get<'a>(&'a self, key: &'a K) -> Result<MultimapValueIter<'a, V>, Error>

fn range<'a, T: RangeBounds<&'a K> + 'a>( &'a self, range: T) -> Result<MultimapRangeIter<'a, K, V>, Error>

fn len(&self) -> Result<usize, Error>

fn is_empty(&self) -> Result<bool, Error>

Auto Trait Implementations

impl<'db, 'txn, K, V> !RefUnwindSafe for MultimapTable<'db, 'txn, K, V>

impl<'db, 'txn, K, V> !Send for MultimapTable<'db, 'txn, K, V>

impl<'db, 'txn, K, V> !Sync for MultimapTable<'db, 'txn, K, V>

impl<'db, 'txn, K: ?Sized, V: ?Sized> Unpin for MultimapTable<'db, 'txn, K, V> where K: Unpin, V: Unpin, 'db: 'txn,

impl<'db, 'txn, K, V> !UnwindSafe for MultimapTable<'db, 'txn, K, V>

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, 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>

fn range<'a, T: RangeBounds<&'a K> + 'a>(
&'a self,
range: T
) -> Result<MultimapRangeIter<'a, K, V>, Error>

impl<'db, 'txn, K: ?Sized, V: ?Sized> Unpin for MultimapTable<'db, 'txn, K, V> where
K: Unpin,
V: Unpin,
'db: 'txn,

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>,