Enum Error 

pub enum Error {
    LoadFailed {
        source: Error,
        paths: Vec<String>,
    },
    SymbolNotFound {
        name: &'static str,
        source: Error,
    },
    ModelLoadFailed {
        path: PathBuf,
    },
    InvalidPath(NulError),
    InvalidOption(NulError),
    InterpreterCreateFailed,
    AllocateTensorsFailed,
    InvokeFailed {
        status: TfLiteStatus,
    },
    TensorIndexOutOfBounds {
        index: usize,
        count: usize,
    },
    DtypeMismatch {
        expected: TfLiteType,
        actual: TfLiteType,
    },
    NullTensor,
    NullData,
    DelegateCreateFailed,
    DelegateOptionRejected {
        status: TfLiteStatus,
    },
    ExternalDelegateApiUnavailable,
}

Errors that can arise while loading the TensorFlow Lite shared library, building an interpreter, or operating on tensors.

Variants

LoadFailed

None of the candidate shared-library paths could be opened.

The paths list records every probe attempt in order. The source contains the last underlying libloading failure, which is usually the most informative.

Fields

source: Error

Underlying loader error from the last attempted path.

paths: Vec<String>

All candidate paths that were probed, in the order they were tried.

SymbolNotFound

The shared library opened but a required exported symbol was missing.

Fields

name: &'static str

Name of the missing symbol (matches the upstream C identifier).

source: Error

Underlying loader error.

ModelLoadFailed

TfLiteModelCreateFromFile returned NULL for the given path.

Fields

path: PathBuf

Filesystem path passed to the loader.

InvalidPath(NulError)

A filesystem path could not be expressed as a C string (non-UTF-8 or embedded NUL byte).

InvalidOption(NulError)

A delegate option key/value pair contained an embedded NUL byte.

InterpreterCreateFailed

TfLiteInterpreterCreate returned NULL.

AllocateTensorsFailed

TfLiteInterpreterAllocateTensors returned a non-Ok status.

InvokeFailed

TfLiteInterpreterInvoke returned a non-Ok status.

Fields

status: TfLiteStatus

Raw status code returned by the C API.

TensorIndexOutOfBounds

Tensor index was out of bounds for the interpreter.

Fields

index: usize

The requested tensor index.

count: usize

The number of tensors available.

DtypeMismatch

The tensor’s actual element type did not match the typed accessor.

Fields

expected: TfLiteType

The element type the caller requested.

actual: TfLiteType

The element type the tensor actually has.

NullTensor

A tensor handle returned by the C API was unexpectedly NULL.

NullData

A tensor’s data pointer was unexpectedly NULL.

DelegateCreateFailed

TfLiteExternalDelegateCreate returned NULL.

DelegateOptionRejected

The C API rejected an external-delegate option (non-Ok status).

Fields

status: TfLiteStatus

Raw status returned by the C API.

ExternalDelegateApiUnavailable

The loaded TFLite library does not export the TfLiteExternalDelegate* symbol group, so this crate cannot construct an crate::ExternalDelegate.

These symbols live in TFLite’s experimental C header and are routinely omitted from prebuilt shared objects. The core load → invoke path remains fully functional — only external-delegate construction is blocked.

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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.