Enum BackendError 

pub enum BackendError {
    MissingInput {
        name: String,
        op_type: String,
    },
    OutputNotTensor {
        op_type: String,
    },
    KernelFailed {
        op_type: String,
        source: OpError,
    },
    DefaultWalker(BackendWalkError),
}

Failures execute_graph may surface alongside the kernel-level OpErrors already routed through the existing dispatch.

Variants

MissingInput

A node input name isn’t in the value env. The graph either uses a value the caller didn’t bind OR an upstream node failed to populate one of its declared outputs.

Fields

name: String

Name of the missing value.

op_type: String

op_type of the consuming node, for diagnostics.

OutputNotTensor

A node output value isn’t a CpuTensor. The CpuBackend’s graph walker only handles f32 tensors; any other SlotValue kind from a custom kernel rejects.

Fields

op_type: String

op_type that produced the offending value.

KernelFailed

The kernel itself returned an OpError. Wraps the error so callers see which op surfaced it.

Fields

op_type: String

op_type that failed.

source: OpError

Underlying kernel error.

DefaultWalker(BackendWalkError)

Bridged failure from the framework’s default Backend walker (malformed graph fed to Backend::execute).

Trait Implementations

impl Debug for BackendError

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

Formats the value using the given formatter.

impl Display for BackendError

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

Formats the value using the given formatter.

impl Error for BackendError

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<BackendWalkError> for BackendError

fn from(value: BackendWalkError) -> Self

Converts to this type from the input type.