Struct Column 

#[non_exhaustive]
pub struct Column {
    pub name: String,
    pub data_type: DataType,
    pub nullable: bool,
}

One column’s name + inferred type. nullable is true if any sample row had a missing/empty value in this position.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

name: String

Column header. Falls back to column_<idx> when the underlying file has no header row or the cell is empty.

data_type: DataType

Type inferred from the sample rows. Unknown when every sample row’s cell was empty/null in this position.

nullable: bool

true if any sample row had a null/empty cell here.

Implementations

impl Column

pub fn new(name: impl Into<String>, data_type: DataType, nullable: bool) -> Self

Construct a Column from name + inferred type + nullability. Required because Column is #[non_exhaustive] so external crates implementing a custom Reader can’t construct via struct-literal syntax.

Trait Implementations

impl Clone for Column

fn clone(&self) -> Column

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Column

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

Formats the value using the given formatter.