Enum ContractionError 

pub enum ContractionError {
    InvalidNotation(String),
    LabelMismatch {
        expected: usize,
        actual: usize,
        tensor: String,
    },
    DimensionMismatch {
        label: String,
        lhs_dim: usize,
        rhs_dim: usize,
    },
    LabelNotFound {
        label: String,
        tensor: String,
    },
    DuplicateOutputLabel {
        label: String,
    },
}

Error raised while parsing or validating an Einstein-notation contraction.

Every variant fully describes its own failure; none wraps a structured inner error. ContractionError is therefore a leaf in the error chain — its source() is always None.

Variants

InvalidNotation(String)

The notation string could not be parsed as valid Einstein notation.

LabelMismatch

A tensor’s label count does not match its rank.

Fields

expected: usize

Number of labels expected (the tensor’s rank).

actual: usize

Number of labels actually supplied.

tensor: String

Which operand the mismatch occurred on.

DimensionMismatch

A shared label is bound to different extents on the two operands.

Fields

label: String

The label whose extents disagree.

lhs_dim: usize

Extent of the label on the left operand.

rhs_dim: usize

Extent of the label on the right operand.

LabelNotFound

A referenced label is absent from the named tensor.

Fields

label: String

The label that was not found.

tensor: String

Which operand was searched.

DuplicateOutputLabel

The output specification repeats a label.

Fields

label: String

The label that appears more than once in the output.

Trait Implementations

impl Clone for ContractionError

fn clone(&self) -> ContractionError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ContractionError

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

Formats the value using the given formatter.

impl Display for ContractionError

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

Formats the value using the given formatter.

impl Error for ContractionError

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 PartialEq for ContractionError

fn eq(&self, other: &ContractionError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ContractionError