Enum CubeClient 

pub enum CubeClient {
    Stub,
}

An initialised CubeCL compute client for one of the supported backends.

The variant is determined by which runtime feature was compiled in and what CubeDevice the runtime was built for. ops.rs matches on this enum to dispatch generic CubeCL kernels to the correct backend.

The CubeClient::Stub variant is always present (no cfg gate) and is reserved for tests — it holds no client state and every kernel dispatch macro has a Stub => unreachable!() arm. Tests that want to exercise pre-dispatch paths (shape checks, signature pins) on a machine without a real backend can build a CubeRuntime via CubeRuntime::new_for_testing, whose client field is Stub. Production code paths never construct or observe Stub because CubeRuntime::new only ever yields a real backend client. (#1083)

Variants

Stub

Test stub — every kernel dispatch panics; only pre-dispatch paths (shape checks, signature pins) are reachable.

This variant is always compiled in (no cfg gate) so tests in any feature configuration can construct a runtime without a real backend client. Reaching a kernel dispatch arm with Stub is a test-discipline bug — the shape-mismatch test must fire before dispatch. (#1083)

Trait Implementations

impl Clone for CubeClient

fn clone(&self) -> CubeClient

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CubeClient

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

Formats the value using the given formatter.