SquashedOffset

spacetimedb_table::indexes

Struct SquashedOffset 

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pub struct SquashedOffset(pub u8);
Expand description

Indicates which version of a Table is referred to by a RowPointer.

Currently, SquashedOffset has two meaningful values, SquashedOffset::TX_STATE and SquashedOffset::COMMITTED_STATE, which refer to the TX scratchpad and the committed state respectively.

In the future, SquashedOffset will be extended to capture which savepoint within a transaction the pointer refers to, or which committed-unsquashed preceding transaction.

Tuple Fields§

§0: u8

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impl SquashedOffset

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pub const TX_STATE: Self

The SquashedOffset for the TX scratchpad.

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pub const COMMITTED_STATE: Self

The SquashedOffset for the committed (squashed) state.

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pub const fn is_tx_state(self) -> bool

Does this SquahsedOffset refer to the TX scratchpad?

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pub const fn is_committed_state(self) -> bool

Does this SquashedOffset refer to the committed (squashed) state?

Trait Implementations§

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impl Clone for SquashedOffset

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fn clone(&self) -> SquashedOffset

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for SquashedOffset

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

Formats the value using the given formatter. Read more
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impl MemoryUsage for SquashedOffset

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fn heap_usage(&self) -> usize

The heap memory usage of this type. The default implementation returns 0.
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impl PartialEq for SquashedOffset

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fn eq(&self, other: &SquashedOffset) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for SquashedOffset

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impl Eq for SquashedOffset

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impl StructuralPartialEq for SquashedOffset

Auto Trait 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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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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> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for 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
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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.