Enum MattenDataError 

#[non_exhaustive]
pub enum MattenDataError {
    Csv {
        message: String,
    },
    Io {
        path: PathBuf,
        source: Error,
    },
    EmptyInput,
    MissingColumn {
        name: String,
    },
    DuplicateColumn {
        name: String,
    },
    DuplicateSelection {
        name: String,
    },
    RaggedRow {
        row: usize,
        expected: usize,
        actual: usize,
    },
    NonNumericValue {
        column: String,
        row: usize,
        value: String,
    },
    MissingValue {
        column: String,
        row: usize,
    },
    EmptySelection,
    Matten(MattenError),
}

Errors produced by matten-data table ingestion and conversion.

All external-input APIs return this type; malformed input never panics (RFC-035 §1). Error messages include row/column context where practical. Row numbers are one-based CSV line numbers (the header is line 1, so the first data row is line 2).

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Csv

A CSV structural problem reported by the parser or by header validation (for example an empty header name).

Fields

message: String

Human-readable description of the problem.

Io

An I/O error while reading a CSV path.

Fields

path: PathBuf

The path that failed to read.

source: Error

The underlying I/O error.

EmptyInput

The input was empty (no header row).

MissingColumn

A requested column name does not exist in the table.

Fields

name: String

The requested column name.

DuplicateColumn

The CSV header contains a duplicate column name.

Fields

name: String

The duplicated column name.

DuplicateSelection

The same column name was requested more than once in a selection.

Fields

name: String

The duplicated selection name.

RaggedRow

A data row has a different number of cells than the header.

Fields

row: usize

One-based CSV line number of the offending row.

expected: usize

Number of columns expected (from the header).

actual: usize

Number of cells actually found.

NonNumericValue

A cell could not be converted to f64 during numeric conversion.

Fields

column: String

Column name.

row: usize

One-based CSV line number.

value: String

The offending cell value, rendered as text.

MissingValue

A missing cell remained during numeric conversion (fill it first).

Fields

column: String

Column name.

row: usize

One-based CSV line number.

EmptySelection

A column selection or conversion was attempted with no columns.

Matten(MattenError)

A wrapped core matten error (for example from Tensor construction).

Trait Implementations

impl Debug for MattenDataError

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

Formats the value using the given formatter.

impl Display for MattenDataError

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

Formats the value using the given formatter.

impl Error for MattenDataError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<MattenError> for MattenDataError

fn from(e: MattenError) -> Self

Converts to this type from the input type.