diff --git a/src/kernels/bang/cast.cc b/src/kernels/bang/cast.cc
index 35da0190..a3d56654 100644
--- a/src/kernels/bang/cast.cc
+++ b/src/kernels/bang/cast.cc
@@ -22,142 +22,142 @@ class CastCnnl : public BangKernelWithoutConfig {
         checkCnnlError(cnnlCreateTensorDescriptor(&aDesc));
         checkCnnlError(cnnlCreateTensorDescriptor(&cDesc));
         cnnlCastDataType_t NlCastType;
-        CastObj::CastType type = op->getType();
+        CastType type = op->getType();
         switch (type) {
-        case CastObj::Float2Int64:
+        case CastType::Float2Int64:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_FLOAT, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT64, 4, dim_array));
             NlCastType = CNNL_CAST_FLOAT_TO_INT64;
             break;
-        case CastObj::Float2Int32:
+        case CastType::Float2Int32:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_FLOAT, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT32, 4, dim_array));
             NlCastType = CNNL_CAST_FLOAT_TO_INT32;
             break;
-        case CastObj::Float2Int16:
+        case CastType::Float2Int16:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_FLOAT, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT16, 4, dim_array));
             NlCastType = CNNL_CAST_FLOAT_TO_INT16;
             break;
-        case CastObj::Float2Int8:
+        case CastType::Float2Int8:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_FLOAT, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT8, 4, dim_array));
             NlCastType = CNNL_CAST_FLOAT_TO_INT8;
             break;
-        case CastObj::Int322Float:
+        case CastType::Int322Float:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT32, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_FLOAT, 4, dim_array));
             NlCastType = CNNL_CAST_INT32_TO_FLOAT;
             break;
-        case CastObj::Int322Int8:
+        case CastType::Int322Int8:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT32, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT8, 4, dim_array));
             NlCastType = CNNL_CAST_INT32_TO_INT8;
             break;
-        case CastObj::Int322Int16:
+        case CastType::Int322Int16:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT32, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT16, 4, dim_array));
             NlCastType = CNNL_CAST_INT32_TO_INT16;
             break;
-        case CastObj::Int162Float:
+        case CastType::Int162Float:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT16, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_FLOAT, 4, dim_array));
             NlCastType = CNNL_CAST_INT16_TO_FLOAT;
             break;
-        case CastObj::Int162Int32:
+        case CastType::Int162Int32:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT16, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT32, 4, dim_array));
             NlCastType = CNNL_CAST_INT16_TO_INT32;
             break;
-        case CastObj::Int82Float:
+        case CastType::Int82Float:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT8, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_FLOAT, 4, dim_array));
             NlCastType = CNNL_CAST_INT8_TO_FLOAT;
             break;
-        case CastObj::Int82Int16:
+        case CastType::Int82Int16:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT8, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT16, 4, dim_array));
             NlCastType = CNNL_CAST_INT8_TO_INT16;
             break;
-        case CastObj::Int82Int32:
+        case CastType::Int82Int32:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT8, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT32, 4, dim_array));
             NlCastType = CNNL_CAST_INT8_TO_INT32;
             break;
-        case CastObj::Uint82Float:
+        case CastType::Uint82Float:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_UINT8, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_FLOAT, 4, dim_array));
             NlCastType = CNNL_CAST_UINT8_TO_FLOAT;
             break;
-        case CastObj::Uint82Int32:
+        case CastType::Uint82Int32:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_UINT8, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT32, 4, dim_array));
             NlCastType = CNNL_CAST_UINT8_TO_INT32;
             break;
-        case CastObj::Uint82Int64:
+        case CastType::Uint82Int64:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_UINT8, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT64, 4, dim_array));
             NlCastType = CNNL_CAST_UINT8_TO_INT64;
             break;
-        case CastObj::Int322Int64:
+        case CastType::Int322Int64:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT32, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT64, 4, dim_array));
             NlCastType = CNNL_CAST_INT32_TO_INT64;
             break;
-        case CastObj::Int642Int32:
+        case CastType::Int642Int32:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT64, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT32, 4, dim_array));
             NlCastType = CNNL_CAST_INT64_TO_INT32;
             break;
-        case CastObj::Int642Uint32:
+        case CastType::Int642Uint32:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT64, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_UINT32, 4, dim_array));
             NlCastType = CNNL_CAST_INT64_TO_UINT32;
             break;
-        case CastObj::Int642Float:
+        case CastType::Int642Float:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_INT64, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
                 cDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_FLOAT, 4, dim_array));
             NlCastType = CNNL_CAST_INT64_TO_FLOAT;
             break;
-        case CastObj::Uint322Int64:
+        case CastType::Uint322Int64:
             checkCnnlError(cnnlSetTensorDescriptor(
                 aDesc, CNNL_LAYOUT_NCHW, CNNL_DTYPE_UINT32, 4, dim_array));
             checkCnnlError(cnnlSetTensorDescriptor(
diff --git a/test/kernels/bang/test_bang_cast.cc b/test/kernels/bang/test_bang_cast.cc
index 7bcc44ea..57bea058 100644
--- a/test/kernels/bang/test_bang_cast.cc
+++ b/test/kernels/bang/test_bang_cast.cc
@@ -23,7 +23,7 @@ void testCast(const std::function<void(void *, size_t, DataType)> &generator,
     // GPU
     Graph bangGraph = make_ref<GraphObj>(bangRuntime);
     auto inputGpu = bangGraph->cloneTensor(inputCpu);
-    auto gpuOp = bangGraph->addOp<T>(inputGpu, nullptr, CastObj::Float2Int32);
+    auto gpuOp = bangGraph->addOp<T>(inputGpu, nullptr, CastType::Float2Int32);
     auto outputGpu = gpuOp->getOutput();
     bangGraph->dataMalloc();
     bangRuntime->run(bangGraph);