Enum WriteError 

pub enum WriteError {
    UnknownWire {
        key: String,
    },
    TypeMismatch {
        slot: String,
        expected: PortType,
        got: PortType,
    },
}

Error returned by Dataflow::set_wire_idx / Dataflow::set_wire when the typed-write contract at the composition-substrate boundary cannot be satisfied.

Per composition_substrate.md axiom S4, “T1 + T2 ensure writes are type-checked at the boundary” — the typed-write API rejects writes whose Value variant doesn’t match the declared slot port type, after first attempting auto-adapter healing. This error names the rejection reason.

Variants

UnknownWire

The wire key did not resolve to a known input slot. Carries the name that was looked up; for indexed writes the index is reported instead.

Fields

key: String

The name or index looked up.

TypeMismatch

The value’s port type did not match the slot’s declared port type and no auto-adapter exists to heal the mismatch. Both expected and provided port types are reported for diagnostic clarity.

Fields

slot: String

The slot written.

expected: PortType

Its declared type.

got: PortType

The value’s type.

Trait Implementations

impl Clone for WriteError

fn clone(&self) -> WriteError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WriteError

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

Formats the value using the given formatter.

impl Display for WriteError

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

Formats the value using the given formatter.

impl Error for WriteError

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 WriteError

fn eq(&self, other: &WriteError) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for WriteError