Enum MattenError 

#[non_exhaustive]
pub enum MattenError {
    Shape {
        operation: &'static str,
        message: String,
    },
    Broadcast {
        left: Vec<usize>,
        right: Vec<usize>,
    },
    Allocation {
        requested_elements: usize,
        message: String,
    },
    Slice {
        input: Option<String>,
        message: String,
    },
    Parse {
        format: DataFormat,
        message: String,
    },
    Io {
        path: PathBuf,
        source: Error,
    },
    Unsupported {
        operation: &'static str,
        message: String,
    },
}

The single public error type for matten.

The variant set is canonical (RFC-005). It derives only Debug; it is not Clone, PartialEq, or Eq. Tests should match by variant, e.g. matches!(err, MattenError::Shape { .. }).

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.

Shape

Invalid shape, length mismatch, or a constructor argument (such as an arange step / finite bound) that determines the produced tensor shape.

Fields

operation: &'static str

The operation that failed, e.g. "new", "reshape", "arange".

message: String

Human-readable, actionable detail.

Broadcast

Two shapes could not be broadcast together (never folded into Shape).

Fields

left: Vec<usize>

Left operand shape.

right: Vec<usize>

Right operand shape.

Allocation

A shape product overflowed or an allocation exceeded a safety limit.

Fields

requested_elements: usize

The requested element count (or the value that overflowed).

message: String

Human-readable detail.

Slice

A slice specification (builder or slice_str) was invalid.

Fields

input: Option<String>

The original slice string, when the error came from slice_str.

message: String

Human-readable detail.

Parse

A data-format parse error (JSON or CSV). Row/column context, when available, is carried inside message.

Fields

format: DataFormat

Which data format produced the error.

message: String

Human-readable detail.

Io

A file I/O error while loading data.

Fields

path: PathBuf

The path that was being read.

source: Error

The underlying I/O error.

Unsupported

An operation or input is not supported in this build or phase (for example, a feature-gated capability that is disabled).

Fields

operation: &'static str

The operation that is unsupported.

message: String

Human-readable detail.

Trait Implementations

impl Debug for MattenError

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

Formats the value using the given formatter.

impl Display for MattenError

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

Formats the value using the given formatter.

impl Error for MattenError

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.