Enum HwError 

pub enum HwError {
    Registry(String),
    UnknownDevice {
        id: String,
        known: Vec<String>,
    },
    Class(String),
    BuildContradictsDevice {
        device: String,
        class: String,
        macro_name: String,
        requires: String,
        defined: bool,
    },
    TensorCore {
        class: String,
        violations: String,
    },
    Model(String),
    Plan(String),
    Cost(CostError),
}

2026-09-30: Why a hardware plan could not be built.

Variants

Registry(String)

2026-09-30: kernels/DEVICES.toml.

UnknownDevice

2026-09-30: A device id the registry does not list.

Fields

id: String

2026-09-30: The id asked for.

known: Vec<String>

2026-09-30: The ids listed.

Class(String)

2026-09-30: A class’s HARDWARE.toml, FUSIONS.toml, KERNEL_FAMILIES.toml or sources.

BuildContradictsDevice

2026-09-30: The class’s build flags and the device’s instruction kinds disagree.

Fields

device: String

2026-09-30: Device id.

class: String

2026-09-30: Class.

macro_name: String

2026-09-30: Guard macro.

requires: String

2026-09-30: The instruction kind it stands for.

defined: bool

2026-09-30: The class defines the macro.

TensorCore

2026-10-02: A plan runs a policy-covered op off tensor cores with no exemption.

Fields

class: String

2026-10-02: The class.

violations: String

2026-10-02: One line per violation (tc_policy::describe).

Model(String)

2026-09-30: The model.

Plan(String)

2026-09-30: Fusing.

Cost(CostError)

2026-09-30: The roofline.

Trait Implementations

impl Clone for HwError

fn clone(&self) -> HwError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HwError

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

Formats the value using the given formatter.

impl Display for HwError

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

Formats the value using the given formatter.

impl Error for HwError

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<CostError> for HwError

fn from(source: CostError) -> Self

Converts to this type from the input type.

impl PartialEq for HwError

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