Enum ColumnData 

pub enum ColumnData {
    Integer {
        validity: Bitmask,
        values: SharedVec<i64>,
    },
    Float {
        validity: Bitmask,
        values: SharedVec<f64>,
    },
    Any(SharedVec<ResultData>),
}

A column of computed values, stored in whichever representation fits what it currently holds.

A column starts out as Integer and widens as needed: writing a float promotes it to Float, and writing anything that is neither demotes it to Any. It never narrows back. The two numeric representations keep a separate validity Bitmask so a blank cell is distinct from a zero.

This is a storage detail of DataColumn, exposed for reading. The operations that change a column’s length are crate-private, since they would desync it from the sibling vectors it must stay aligned with – go through Sheet to edit cells.

Variants

Integer

All-integer, or integer-and-blank.

Fields

validity: Bitmask

Which positions hold a value rather than a blank.

values: SharedVec<i64>

The values. Positions marked invalid hold a placeholder.

Float

Numeric with at least one non-integer, or integer-and-blank promoted.

Fields

validity: Bitmask

Which positions hold a value rather than a blank.

values: SharedVec<f64>

The values. Positions marked invalid hold a placeholder.

Any(SharedVec<ResultData>)

Mixed: anything the numeric representations cannot hold – text, booleans, errors.

Implementations

impl ColumnData

pub fn len(&self) -> usize

How many rows the column holds.

pub fn is_empty(&self) -> bool

Whether the column holds no rows at all.

pub fn get(&self, index: usize) -> Option<ResultData>

The value at index, or None if that is past the end.

A blank within the column’s range reads as Some(ResultData::None), which is what distinguishes it from an out-of-range index.

Trait Implementations

impl Clone for ColumnData

fn clone(&self) -> ColumnData

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ColumnData

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

Formats the value using the given formatter.

impl Default for ColumnData

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ColumnData

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ColumnData

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.