Function cutensorPlanGetAttribute 

pub unsafe extern "C" fn cutensorPlanGetAttribute(
    handle: cutensorHandle_t,
    plan: cutensorPlan_t,
    attr: cutensorPlanAttribute_t,
    buf: *mut c_void,
    sizeInBytes: size_t,
) -> cutensorStatus_t

Retrieves information about an already-created plan (see cutensorPlanAttribute_t)

Block-sparse contraction plans only support cutensorPlanAttribute_t::CUTENSOR_PLAN_REQUIRED_WORKSPACE.

Parameters

• plan: Denotes an already-created plan (e.g., via cutensorCreatePlan or cutensorCreatePlanAutotuned).
• attr: Requested attribute.
• buf: On successful exit: Holds the information of the requested attribute.
• sizeInBytes: size of buf in bytes.

Return value

• cutensorStatus_t::CUTENSOR_STATUS_INVALID_VALUE: if some input data is invalid (this typically indicates an user error).
• cutensorStatus_t::CUTENSOR_STATUS_SUCCESS: The operation completed successfully.