Enum GraphQueryError 

pub enum GraphQueryError {
    NotBinaryOperation,
    NotUnaryOperation,
    NotUnorderedOperation,
    NotOrderedOperation,
    NoSuchNode,
    IncorrectBinaryOperandEdges,
    IncorrectUnaryOperandEdge,
    IncorrectUnorderedOperandEdge,
    IncorrectOrderedOperandEdge,
}

An error that can occur when querying various aspects about an operation graph.

Variants

NotBinaryOperation

The given operation is not a binary operation.

NotUnaryOperation

The given graph node wasn’t a unary operation.

NotUnorderedOperation

The given graph node wasn’t an unordered operation.

NotOrderedOperation

The given graph node wasn’t an ordered operation.

NoSuchNode

No node exists at the given index.

IncorrectBinaryOperandEdges

The given node doesn’t have 1 left and 1 right edge.

IncorrectUnaryOperandEdge

The given node doesn’t have exactly 1 unary edge.

IncorrectUnorderedOperandEdge

The given node has a non-unordered edge.

IncorrectOrderedOperandEdge

The given node has a non-ordered edge.

Trait Implementations

impl Clone for GraphQueryError

fn clone(&self) -> GraphQueryError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GraphQueryError

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

Formats the value using the given formatter.

impl Display for GraphQueryError

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

Formats the value using the given formatter.

impl Error for GraphQueryError

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 GraphQueryError

fn eq(&self, other: &GraphQueryError) -> 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 GraphQueryError

impl Eq for GraphQueryError

impl StructuralPartialEq for GraphQueryError