Enum DeriveError 

pub enum DeriveError {
    UndeclaredDependency(NodeId),
    MissingValue(NodeId),
    WrongCollectionType(NodeId),
    Message(String),
}

Error returned by a pure derived node computation.

Variants

UndeclaredDependency(NodeId)

A derive function tried to read a node it did not declare.

MissingValue(NodeId)

A dependency had no committed value.

WrongCollectionType(NodeId)

A collection dependency was read with the wrong set/map shape or value type.

Message(String)

User-defined derivation failed.

Implementations

impl DeriveError

pub fn message(message: impl Into<String>) -> Self

Creates a user-defined derive error.

Trait Implementations

impl Clone for DeriveError

fn clone(&self) -> DeriveError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DeriveError

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

Formats the value using the given formatter.

impl Eq for DeriveError

impl From<DeriveError> for OutputError

fn from(error: DeriveError) -> Self

Converts to this type from the input type.

impl PartialEq for DeriveError

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