Enum OperatorFactoryError 

pub enum OperatorFactoryError {
    EmptySources,
    ZeroDefault,
    Register(RegisterError),
}

Errors returnable by crate::combine, crate::merge, [crate::merge_as_op], crate::last_with_default, and [crate::last_with_default_with].

Other operator factories (crate::map, crate::filter, crate::with_latest_from, etc.) have no extra factory-shape invariants beyond Core’s checks — they panic on Core-layer RegisterError via .expect("invariant: caller has validated dep ids …") because their public contract is “the caller supplies already-valid NodeIds.” Slice H # Errors rustdoc on those factories documents the panic conditions.

Variants

EmptySources

combine / merge / merge_as_op was called with empty sources. At least one upstream is required — for fan-out broadcast use a producer node with explicit subscriptions.

ZeroDefault

last_with_default / last_with_default_with was called with NO_HANDLE as the default. Use crate::last for the no-default variant, which emits Complete without a Data on empty streams.

Register(RegisterError)

Underlying Core registration failed. Transparent-wrapped so register_operator(...)? propagates correctly.

Trait Implementations

impl Clone for OperatorFactoryError

fn clone(&self) -> OperatorFactoryError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OperatorFactoryError

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

Formats the value using the given formatter.

impl Display for OperatorFactoryError

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

Formats the value using the given formatter.

impl Error for OperatorFactoryError

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 From<RegisterError> for OperatorFactoryError

fn from(source: RegisterError) -> Self

Converts to this type from the input type.

impl PartialEq for OperatorFactoryError

fn eq(&self, other: &OperatorFactoryError) -> 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 Eq for OperatorFactoryError

impl StructuralPartialEq for OperatorFactoryError