Enum VerificationError 

pub enum VerificationError {
    UnknownRule(String),
    GoalMismatch {
        node_id: u64,
        expected: String,
        actual: String,
    },
    PremiseMismatch {
        node_id: u64,
        index: usize,
    },
    CyclicProof(u64),
    EmptyProof,
}

Errors produced during proof verification.

Variants

UnknownRule(String)

The rule ID referenced by a node is not registered.

GoalMismatch

The node’s goal does not match the rule’s head pattern.

Fields

node_id: u64

expected: String

actual: String

PremiseMismatch

The number of premises at a node does not match the rule’s arity.

Fields

node_id: u64

index: usize

CyclicProof(u64)

A cycle was detected in the proof tree at the given node.

EmptyProof

The proof contains no nodes.

Trait Implementations

impl Clone for VerificationError

fn clone(&self) -> VerificationError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VerificationError

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

Formats the value using the given formatter.

impl Display for VerificationError

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

Formats the value using the given formatter.

impl Eq for VerificationError

impl Error for VerificationError

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 VerificationError

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