Function build_boolean_array

arrow-csv/src/reader/mod.rs:1070–1099

parses a specific column (col_idx) into an Arrow Array.

(
    line_number: usize,
    rows: &StringRecords<'_>,
    col_idx: usize,
    null_regex: &NullRegex,
)

// parses a specific column (col_idx) into an Arrow Array.
fn build_boolean_array(
    line_number: usize,
    rows: &StringRecords<'_>,
    col_idx: usize,
    null_regex: &NullRegex,
) -> Result<ArrayRef, ArrowError> {
    rows.iter()
        .enumerate()
        .map(|(row_index, row)| {
            let s = row.get(col_idx);
            if null_regex.is_null(s) {
                return Ok(None);
            }
            let parsed = parse_bool(s);
            match parsed {
                Some(e) => Ok(Some(e)),
                None => Err(ArrowError::ParseError(format!(
                    // TODO: we should surface the underlying error here.
                    "Error while parsing value '{}' as type '{}' for column {} at line {}. Row data: '{}'",
                    s,
                    "Boolean",
                    col_idx,
                    line_number + row_index,
                    row
                ))),
            }
        })
        .collect::<Result<BooleanArray, _>>()
        .map(|e| Arc::new(e) as ArrayRef)
}

/// Builder for CSV [`Reader`]s
#[derive(Debug)]