changes after review

Author: jakpiase

paddle/fluid/operators/cast_op.cc

@@ -87,8 +87,8 @@ class CastOp : public framework::OperatorWithKernel {
     int out_dtype = ctx.Attr<int>("out_dtype");
 
     auto MKLDNNSupportsCast = [&]() -> bool {
-      int dtype_fp32 = (int)framework::proto::VarType::FP32;
-      int dtype_bf16 = (int)framework::proto::VarType::BF16;
+      int dtype_fp32 = static_cast<int>(framework::proto::VarType::FP32);
+      int dtype_bf16 = static_cast<int>(framework::proto::VarType::BF16);
 
       if ((in_dtype != dtype_fp32 && in_dtype != dtype_bf16) or
           (out_dtype != dtype_fp32 && out_dtype != dtype_bf16))

python/paddle/fluid/tests/unittests/mkldnn/test_cast_mkldnn_op.py

@@ -14,14 +14,14 @@
 
 from __future__ import print_function
 
-from paddle.fluid.tests.unittests.op_test import OpTest, convert_float_to_uint16, convert_uint16_to_float
 import unittest
 import numpy as np
 
 import paddle
 import paddle.fluid.core as core
 import paddle.fluid as fluid
 from paddle.fluid import compiler, Program, program_guard
+from paddle.fluid.tests.unittests.op_test import OpTest, convert_float_to_uint16
 
 
 @unittest.skipIf(not core.supports_bfloat16(),