polars_core::chunked_array::metadata

Struct IMMetadata

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pub struct IMMetadata<T: PolarsDataType>(/* private fields */);
Expand description

An interiorally mutable Metadata

This is essentially a more convenient API around RwLock<Metadata>. This also allows it to be Clone.

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impl<'a, T: PolarsDataType + 'a> IMMetadata<T>
where Metadata<T>: MetadataTrait + 'a,

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pub fn upcast(&'a self) -> &'a RwLock<dyn MetadataTrait + 'a>

Cast the IMMetadata to a trait object of MetadataTrait

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pub fn boxed_upcast(&'a self) -> Box<dyn MetadataTrait + 'a>

Cast the IMMetadata to a boxed trait object of MetadataTrait

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impl<T: PolarsDataType> IMMetadata<T>

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pub const fn new(md: Metadata<T>) -> Self

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pub fn try_read(&self) -> Option<RwLockReadGuard<'_, Metadata<T>>>

Try to grab a read guard to the Metadata, this fails if this blocks.

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pub fn read(&self) -> RwLockReadGuard<'_, Metadata<T>>

Block to grab a read guard the Metadata

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pub fn try_write(&self) -> Option<RwLockWriteGuard<'_, Metadata<T>>>

Try to grab a write guard to the Metadata, this fails if this blocks.

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pub fn write(&self) -> RwLockWriteGuard<'_, Metadata<T>>

Block to grab a write guard the Metadata

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pub fn take(self) -> Metadata<T>

Take the internal Metadata

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pub fn get_mut(&mut self) -> &mut Metadata<T>

Get the mutable to the internal Metadata

Trait Implementations§

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impl<T: PolarsDataType> Clone for IMMetadata<T>

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fn clone(&self) -> Self

Returns a copy 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<T: PolarsDataType> Default for IMMetadata<T>

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fn default() -> Self

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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impl<T> !Freeze for IMMetadata<T>

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impl<T> RefUnwindSafe for IMMetadata<T>

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impl<T> Send for IMMetadata<T>

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impl<T> Sync for IMMetadata<T>

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impl<T> Unpin for IMMetadata<T>

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impl<T> UnwindSafe for IMMetadata<T>

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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> DynClone for T
where T: Clone,

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fn __clone_box(&self, _: Private) -> *mut ()

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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> 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
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.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V