lance_encoding::repdef

Enum ControlWordIterator

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pub enum ControlWordIterator<'a> {
    Binary8(BinaryControlWordIterator<Zip<Copied<Iter<'a, u16>>, Copied<Iter<'a, u16>>>, u8>),
    Binary16(BinaryControlWordIterator<Zip<Copied<Iter<'a, u16>>, Copied<Iter<'a, u16>>>, u16>),
    Binary32(BinaryControlWordIterator<Zip<Copied<Iter<'a, u16>>, Copied<Iter<'a, u16>>>, u32>),
    Unary8(UnaryControlWordIterator<Copied<Iter<'a, u16>>, u8>),
    Unary16(UnaryControlWordIterator<Copied<Iter<'a, u16>>, u16>),
    Unary32(UnaryControlWordIterator<Copied<Iter<'a, u16>>, u32>),
    Nilary(NilaryControlWordIterator),
}
Expand description

An iterator that generates control words from repetition and definition levels

“Control word” is just a fancy term for a single u8/u16/u32 that contains both the repetition and definition in it.

In the large majority of case we only need a single byte to represent both the repetition and definition levels. However, if there is deep nesting then we may need two bytes. In the worst case we need 4 bytes though this suggests hundreds of levels of nesting which seems unlikely to encounter in practice.

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impl ControlWordIterator<'_>

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pub fn append_next(&mut self, buf: &mut Vec<u8>)

Appends the next control word to the buffer

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pub fn bytes_per_word(&self) -> usize

Returns the number of bytes per control word

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pub fn bits_rep(&self) -> u8

Returns the number of bits used for the repetition level

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pub fn bits_def(&self) -> u8

Returns the number of bits used for the definition level

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impl<'a> Debug for ControlWordIterator<'a>

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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<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
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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> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

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Calls U::from(self).

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

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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

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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
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type Error = Infallible

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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

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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

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