Struct ReadOptions 

#[non_exhaustive]
pub struct ReadOptions {
    pub max_sample_rows: usize,
    pub sheet_name: Option<String>,
    pub has_header: bool,
}

Per-call read configuration. Construct via ReadOptions::default then layer on with the builder methods.

#[non_exhaustive] for forward-compat — same reasoning as Table / Column.

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.

max_sample_rows: usize

Maximum number of rows to surface in Table::sample_rows. Default: 100. Bounded so callers don’t accidentally pull 10M rows into memory chasing a ‘sample.’

sheet_name: Option<String>

For multi-sheet XLSX/ODS, which sheet to read. None = the first non-empty sheet.

has_header: bool

true (default) treats the first row as column headers. false generates column_0, column_1, … names and includes the first row in sample_rows.

Implementations

impl ReadOptions

pub fn max_sample_rows(self, n: usize) -> Self

Override the maximum sample-row count.

pub fn sheet_name(self, name: impl Into<String>) -> Self

Select a specific sheet by name. Only meaningful for multi-sheet formats (XLSX, ODS); a no-op on CSV/TSV.

pub fn has_header(self, has_header: bool) -> Self

Toggle header-row treatment. Defaults to true.

Trait Implementations

impl Clone for ReadOptions

fn clone(&self) -> ReadOptions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ReadOptions

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

Formats the value using the given formatter.

impl Default for ReadOptions

fn default() -> Self

Returns the “default value” for a type.