Enum CompositionFailure 

pub enum CompositionFailure {
    MalformedOperand,
    OperandSigmaAxisMismatch {
        expected_axis: &'static str,
        operand_axis: &'static str,
    },
    PipelineFailure,
}

Failure modes from the composition operations.

Variants

MalformedOperand

An operand is not a well-formed κ-label (no : separator, an odd-length or non-lowercase-hex digest body).

OperandSigmaAxisMismatch

An operand’s σ-axis does not match the operation’s axis (CA-3 σ-axis homogeneity). For the binary product, this also fires when the two operands carry different axes.

Fields

expected_axis: &'static str

The σ-axis the operation expects.

operand_axis: &'static str

The σ-axis the offending operand carries.

PipelineFailure

Defensive: foundation’s catamorphism or a resolver returned a shape violation. Unreachable for well-formed operands.

Trait Implementations

impl Clone for CompositionFailure

fn clone(&self) -> CompositionFailure

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CompositionFailure

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

Formats the value using the given formatter.

impl PartialEq for CompositionFailure

fn eq(&self, other: &CompositionFailure) -> 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 Copy for CompositionFailure

impl Eq for CompositionFailure

impl StructuralPartialEq for CompositionFailure