def test_assignment_arrfunc(self):
af = _lowlevel.make_arrfunc_from_assignment(
ndt.float32, ndt.int64, "nocheck")
self.assertEqual(nd.as_py(af.proto), ndt.type("(int64) -> float32"))
a = nd.array(1234, type=ndt.int64)
b = af(a)
self.assertEqual(nd.type_of(b), ndt.float32)
self.assertEqual(nd.as_py(b), 1234)
# Instantiate as a strided kernel
with _lowlevel.ckernel.CKernelBuilder() as ckb:
meta = (ctypes.c_void_p * 2)()
ectx = nd.eval_context()
_lowlevel.arrfunc_instantiate(af, ckb, 0, ndt.float32, 0,
[ndt.int64], [0], "strided",
ectx._ectx_ptr)
ck = ckb.ckernel(_lowlevel.ExprStridedOperation)
# Do an assignment using ctypes
i64 = (ctypes.c_int64 * 3)()
for i, v in enumerate([3,7,21]):
i64[i] = v
pi64 = ctypes.pointer(i64)
i64_stride = c_ssize_t(8)
f32 = (ctypes.c_float * 3)()
ck(ctypes.addressof(f32), 4,
ctypes.addressof(pi64), ctypes.pointer(i64_stride),
3)
self.assertEqual([f32[i] for i in range(3)], [3,7,21])
def test_creation(self):
af = nd.empty('arrfunc')
self.assertEqual(nd.type_of(af).type_id, 'arrfunc')
# Test there is a string version of a NULL arrfunc
self.assertTrue(str(af) != '')
self.assertEqual(nd.as_py(af.proto), ndt.type())
# Test there is a string version of an initialized arrfunc
af = _lowlevel.make_arrfunc_from_assignment(
ndt.float32, ndt.int64, "nocheck")
self.assertTrue(str(af) != '')
self.assertEqual(nd.as_py(af.proto), ndt.type("(int64) -> float32"))