diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9b77659f6142da3c8b6bb4913a8219683b723a76..a343a65912fb6e8c8d95cebf1af67f7afc8b1a53 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -184,6 +184,9 @@ if(WITH_BRPC_RDMA)
     endif()
 endif()
 
+# for lite
+option(LITE_WITH_CUDA "Enable CUDA in lite mode" ON)
+option(LITE_WITH_X86 "Enable X86 in lite mode" ON)
 
 include(external/threadpool)
 include(flags)              # set paddle compile flags
diff --git a/cmake/configure.cmake b/cmake/configure.cmake
index 283845541b8e303babeed7ed9f9ece2d51a6a2fc..f859fd10a75ec8ebcb23e2303ac5761b5210b151 100644
--- a/cmake/configure.cmake
+++ b/cmake/configure.cmake
@@ -161,3 +161,13 @@ endif(ON_INFER)
 if(WITH_WBAES)
     add_definitions(-DPADDLE_WITH_WBAES)
 endif(WITH_WBAES)
+
+# for lite
+# TODO(Superjomn) not work fine with the option
+if (LITE_WITH_CUDA)
+add_definitions("-DLITE_WITH_CUDA")
+endif()
+
+if (LITE_WITH_X86)
+    add_definitions("-DLITE_WITH_X86")
+endif()
diff --git a/paddle/fluid/lite/api/CMakeLists.txt b/paddle/fluid/lite/api/CMakeLists.txt
index cae0912bd749a2fb8f76b80fbaf9ada62bcf27ec..9997b83ee20f2bf66c6ca153a50d33ea5a1d62e0 100644
--- a/paddle/fluid/lite/api/CMakeLists.txt
+++ b/paddle/fluid/lite/api/CMakeLists.txt
@@ -1,3 +1,3 @@
-cc_library(cxx_api_lite SRCS cxx_api.h DEPS scope_lite executor_lite host_kernels ops_lite)
+cc_library(cxx_api_lite SRCS cxx_api.cc DEPS scope_lite executor_lite host_kernels ops_lite)
 
 cc_test(test_cxx_api_lite SRCS cxx_api_test.cc DEPS cxx_api_lite model_parser_lite)
diff --git a/paddle/fluid/lite/api/cxx_api.cc b/paddle/fluid/lite/api/cxx_api.cc
index 81450cb8d15dc7948c67251fc9af64a90d790d34..35a0373a25a9d71be3d6628e29ace02ce1789d02 100644
--- a/paddle/fluid/lite/api/cxx_api.cc
+++ b/paddle/fluid/lite/api/cxx_api.cc
@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//
-// Created by chunwei on 19-4-11.
-//
-
 #include "paddle/fluid/lite/api/cxx_api.h"
+
+namespace paddle {
+namespace lite {}  // namespace lite
+}  // namespace paddle
diff --git a/paddle/fluid/lite/api/cxx_api.h b/paddle/fluid/lite/api/cxx_api.h
index 9c304b036a5dde924f0d0071112d9d5b3aae7a88..255d55cede5d17bb00e732848b84242774ea763c 100644
--- a/paddle/fluid/lite/api/cxx_api.h
+++ b/paddle/fluid/lite/api/cxx_api.h
@@ -13,8 +13,49 @@
 // limitations under the License.
 
 #pragma once
+#include "paddle/fluid/lite/core/executor.h"
+#include "paddle/fluid/lite/core/op_lite.h"
 #include "paddle/fluid/lite/model_parser/model_parser.h"
 
 namespace paddle {
-namespace lite {}  // namespace lite
+namespace lite {
+
+struct Config {};
+
+class Predictor {
+ public:
+  void Build(const std::string& model_path,
+             const std::vector<OpLite::Place>& valid_places) {
+    CHECK(!executor_.get()) << "duplicate build found";
+    framework::proto::ProgramDesc prog;
+    LoadModel(model_path, &scope_, &prog);
+    framework::ProgramDesc prog_desc(prog);
+
+    executor_.reset(new Executor(&scope_, valid_places));
+    executor_->PrepareWorkspace(prog_desc);
+    executor_->Build(prog_desc);
+  }
+
+  // Get a tensor for input from scope directly.
+  Tensor* GetInputTensor(const std::string& name) {
+    auto* var = executor_->exec_scope()->FindVar(name);
+    CHECK(var) << "no tensor called " << name << " exists";
+    return var->GetMutable<Tensor>();
+  }
+
+  // Get a tensor for output from scope directly.
+  const Tensor* GetOutputTensor(const std::string& name) {
+    auto* var = executor_->exec_scope()->FindVar(name);
+    CHECK(var) << "no tensor called " << name << " exists";
+    return &var->Get<Tensor>();
+  }
+
+  void Run() { executor_->Run(); }
+
+ private:
+  Scope scope_;
+  std::unique_ptr<lite::Executor> executor_;
+};
+
+}  // namespace lite
 }  // namespace paddle
diff --git a/paddle/fluid/lite/api/cxx_api_test.cc b/paddle/fluid/lite/api/cxx_api_test.cc
index 09fd7a78bfcfd7f224af135a6d1a88f7520075dd..157bf41ee1a1aa5d8918ba28dc219396ac16cdfa 100644
--- a/paddle/fluid/lite/api/cxx_api_test.cc
+++ b/paddle/fluid/lite/api/cxx_api_test.cc
@@ -20,7 +20,7 @@
 namespace paddle {
 namespace lite {
 
-TEST(CXXApi, test) {
+TEST(CXXApi, raw) {
   Scope scope;
   framework::proto::ProgramDesc prog;
   LoadModel("/home/chunwei/project2/models/model2", &scope, &prog);
@@ -33,11 +33,20 @@ TEST(CXXApi, test) {
   x->Resize({100, 100});
   x->mutable_data<float>();
 
-  executor.PrepareWorkspace(prog_desc, &scope);
+  executor.PrepareWorkspace(prog_desc);
   executor.Build(prog_desc);
   executor.Run();
 }
 
+TEST(CXXApi, test) {
+  lite::Predictor predictor;
+  predictor.Build("/home/chunwei/project2/models/model2",
+                  {OpLite::Place{TARGET(kHost), PRECISION(kFloat)}});
+  auto* x = predictor.GetInputTensor("a");
+  x->Resize({100, 200});
+  x->mutable_data<float>();
+}
+
 }  // namespace lite
 }  // namespace paddle
 
diff --git a/paddle/fluid/lite/core/context.h b/paddle/fluid/lite/core/context.h
index abf00e53d088a952d25bfc8a789d9b810372e106..ea954fc301373d69d64f088f46c2400972718623 100644
--- a/paddle/fluid/lite/core/context.h
+++ b/paddle/fluid/lite/core/context.h
@@ -13,10 +13,15 @@
 // limitations under the License.
 
 #pragma once
+#include <paddle/fluid/lite/cuda/blas.h>
 #include <memory>
 #include <vector>
 #include "paddle/fluid/lite/core/target_wrapper.h"
 
+#ifdef PADDLE_WITH_CUDA
+#include "paddle/fluid/lite/cuda/cuda_utils.h"
+#endif
+
 namespace paddle {
 namespace lite {
 
@@ -75,5 +80,41 @@ class OpContext final {
   std::vector<TargetType> targets_;
 };
 
+#ifdef LITE_WITH_CUDA
+// Only works with CUDA kernels.
+struct CUDAContext {
+  // overall information
+  cudaStream_t exec_stream;
+  cudaStream_t io_stream;
+
+  // not thread-safe, should allocate for each thread.
+  std::shared_ptr<cuda::Blas<float>> bias_fp32;
+
+  // kernel information
+  std::vector<cudaEvent_t> input_events;
+  std::vector<cudaEvent_t> output_events;
+};
+#endif
+
+#ifdef LITE_WITH_X86
+struct X86Context {
+  // overall information
+  // kernel information
+};
+#endif
+
+// Context for running a kernel.
+// Holds the necessary resource and information.
+class KernelContext {
+ public:
+#ifdef LITE_WITH_CUDA
+  CUDAContext cuda_ctx;
+#endif
+
+#ifdef LITE_WITH_X86
+  X86Context x86_ctx;
+#endif
+};
+
 }  // namespace lite
 }  // namespace paddle
diff --git a/paddle/fluid/lite/core/executor.h b/paddle/fluid/lite/core/executor.h
index b87cb232d9d866c0c1e6315060049a4463bbe342..19c9e2767c0fac9f3e5a569abe384720e58cc920 100644
--- a/paddle/fluid/lite/core/executor.h
+++ b/paddle/fluid/lite/core/executor.h
@@ -28,7 +28,7 @@ class Executor {
       : scope_(scope), valid_places_(valid_places) {}
 
   // Create temporary variables.
-  void PrepareWorkspace(framework::ProgramDesc& program, lite::Scope* scope) {
+  void PrepareWorkspace(framework::ProgramDesc& program) {
     CHECK(!exec_scope_) << "Duplicate PrepareWorkspace found";
     exec_scope_ = &scope_->NewScope();
 
@@ -67,6 +67,9 @@ class Executor {
     }
   }
 
+  lite::Scope* scope() { return scope_; }
+  lite::Scope* exec_scope() { return exec_scope_; }
+
  private:
   std::vector<std::unique_ptr<OpLite>> ops_;
   lite::Scope* scope_{};
diff --git a/paddle/fluid/lite/core/executor_test.cc b/paddle/fluid/lite/core/executor_test.cc
index c52b76555497ff0c658b74f9af6c2506eb2906a0..17b67410894ebbcdbcc650dfe17ab2a956ce4ccc 100644
--- a/paddle/fluid/lite/core/executor_test.cc
+++ b/paddle/fluid/lite/core/executor_test.cc
@@ -53,7 +53,7 @@ TEST(executor, test) {
   w->mutable_data<float>();
   x->mutable_data<float>();
 
-  executor.PrepareWorkspace(program, &scope);
+  executor.PrepareWorkspace(program);
   executor.Build(program);
   executor.Run();
 }
diff --git a/paddle/fluid/lite/core/kernel.h b/paddle/fluid/lite/core/kernel.h
index b2208a015d343302022ac0111947c202e20701fa..3695420d6d90eedcdb9c776090cc1e6a65546b72 100644
--- a/paddle/fluid/lite/core/kernel.h
+++ b/paddle/fluid/lite/core/kernel.h
@@ -47,6 +47,8 @@ class KernelBase {
     return param_.get<Param>();
   }
 
+  void Torch() {}
+
   virtual TargetType target() const = 0;
   virtual PrecisionType precision() const = 0;
 
@@ -63,16 +65,20 @@ class KernelBase {
 template <TargetType Target, PrecisionType Precision>
 class OpKernel : public KernelBase {
  public:
-  virtual void Run() { CHECK(false) << "Not Implemented"; }
+  // Set runtime context.
+  void SetContext(std::unique_ptr<KernelContext>&& ctx) { ctx_ = ctx; }
 
-  void Touch() {}
+  // Run the kernel.
+  virtual void Run() { CHECK(false) << "Not Implemented"; }
 
   TargetType target() const override { return Target; }
   PrecisionType precision() const override { return Precision; }
 
   OpKernel() = default;
-
   virtual ~OpKernel() = default;
+
+ protected:
+  std::unique_ptr<KernelContext> ctx_;
 };
 
 }  // namespace lite
diff --git a/paddle/fluid/lite/cuda/CMakeLists.txt b/paddle/fluid/lite/cuda/CMakeLists.txt
index 4ec76c2a5ec0d77e3b3be7fcf3e266fa68d1cd7e..1ac05bc7cd8a2b885b5cfe680131f7986744d834 100644
--- a/paddle/fluid/lite/cuda/CMakeLists.txt
+++ b/paddle/fluid/lite/cuda/CMakeLists.txt
@@ -1 +1,2 @@
 nv_library(target_wrapper_cuda SRCS target_wrapper.cc)
+nv_library(cuda_blas SRCS blas.cc)
diff --git a/paddle/fluid/lite/cuda/blas.cc b/paddle/fluid/lite/cuda/blas.cc
new file mode 100644
index 0000000000000000000000000000000000000000..87f252fc72d163b6999675029028c2cde39b1310
--- /dev/null
+++ b/paddle/fluid/lite/cuda/blas.cc
@@ -0,0 +1,39 @@
+// Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "paddle/fluid/lite/cuda/blas.h"
+
+namespace paddle {
+namespace lite {
+namespace cuda {
+
+template <>
+class Blas<float> : public BlasBase {
+  using T = float;
+
+  void sgemm(cublasOperation_t transa, cublasOperation_t transb,  //
+             int m, int n, int k,                                 //
+             const T* alpha,                                      //
+             const T* A, int lda,                                 //
+             const T* B, int ldb,                                 //
+             const T* beta,                                       //
+             T* C, int ldc) const {
+    CUBLAS_CALL(cublasSgemm(handle(), transa, transb, m, n, k, alpha, A, lda, B,
+                            ldb, beta, C, ldc));
+  }
+};
+
+}  // namespace cuda
+}  // namespace lite
+}  // namespace paddle
diff --git a/paddle/fluid/lite/cuda/blas.h b/paddle/fluid/lite/cuda/blas.h
new file mode 100644
index 0000000000000000000000000000000000000000..3a8d2fd92216b4fcecc2280dbec7c8641c50e4f9
--- /dev/null
+++ b/paddle/fluid/lite/cuda/blas.h
@@ -0,0 +1,78 @@
+// Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+#include <cublasXt.h>
+#include <cublas_api.h>
+#include <cublas_v2.h>
+#include <glog/logging.h>
+#include <library_types.h>
+#include "paddle/fluid/lite/cuda/cuda_utils.h"
+#include "paddle/fluid/lite/utils/all.h"
+
+namespace paddle {
+namespace lite {
+namespace cuda {
+
+#define CUBLAS_CHECK(xxx) CHECK_EQ((xxx), CUBLAS_STATUS_SUCCESS);
+
+/*
+ * Some basic methods.
+ */
+struct BlasBase {
+  BlasBase() { CUBLAS_CHECK(cublasCreate(&handle_)); }
+  ~BlasBase() { CUBLAS_CHECK(cublasDestroy(handle_)); }
+
+  void SetStream(cudaStream_t stream) {
+    CUBLAS_CHECK(cublasSetStream(handle_, stream));
+  }
+
+  cudaStream_t GetStream() const {
+    cudaStream_t stream;
+    CUBLAS_CHECK(cublasGetStream_v2(handle_, &stream));
+    return stream;
+  }
+
+  int GetVersion() const {
+    int version{};
+    CUBLAS_CHECK(cublasGetVersion_v2(handle_, &version));
+    return version;
+  }
+
+  cublasHandle_t& handle() const { return handle_; }
+
+ protected:
+  // Not thread-safe, should created for each thread.
+  // According to cublas doc.
+  mutable cublasHandle_t handle_;
+};
+
+// T: Scalar type.
+template <typename T>
+class Blas : public lite::cuda::BlasBase {
+ public:
+  void sgemm(cublasOperation_t transa, cublasOperation_t transb,  //
+             int m, int n, int k,                                 //
+             const T* alpha,                                      //
+             const T* A, int lda,                                 //
+             const T* B, int ldb,                                 //
+             const T* beta,                                       //
+             T* C, int ldc) const {
+    LITE_UNIMPLEMENTED;
+  }
+};
+
+}  // namespace cuda
+}  // namespace lite
+}  // namespace paddle
diff --git a/paddle/fluid/lite/cuda/cuda_utils.h b/paddle/fluid/lite/cuda/cuda_utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..bdeaaebbee52991865fb4c08629d5653fff69635
--- /dev/null
+++ b/paddle/fluid/lite/cuda/cuda_utils.h
@@ -0,0 +1,76 @@
+// Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+#include <cublasXt.h>
+#include <cublas_api.h>
+#include <cublas_v2.h>
+#include <cuda.h>
+#include <glog/logging.h>
+
+/*
+ * This file contains some CUDA specific utils.
+ */
+
+// For quickly implementing the prototype, some of the following code snippets
+// are borrowed from project MXNet, great thanks for the original developers.
+
+#define CHECK_CUDA_ERROR(msg)                                                \
+  {                                                                          \
+    auto e = cudaGetLastError();                                             \
+    CHECK_EQ(e, cudaSuccess) << (msg) << " CUDA: " << cudaGetErrorString(e); \
+  }
+
+#define CUDA_CALL(func)                                      \
+  {                                                          \
+    auto e = (func);                                         \
+    CHECK(e == cudaSuccess || e == cudaErrorCudartUnloading) \
+        << "CUDA: " << cudaGetErrorString(e);                \
+  }
+
+#define CUBLAS_CALL(func)                                        \
+  {                                                              \
+    auto e = (func);                                             \
+    CHECK_EQ(e, CUBLAS_STATUS_SUCCESS)                           \
+        << "cuBlas: " << paddle::lite::cuda::CublasErrorInfo(e); \
+  }
+
+namespace paddle {
+namespace lite {
+namespace cuda {
+
+const char* CublasErrorInfo(int error) {
+  switch (error) {
+#define LITE_CUBLAS_ERROR_INFO(xx) \
+  case xx:                         \
+    return #xx;                    \
+    break;
+    LITE_CUBLAS_ERROR_INFO(CUBLAS_STATUS_NOT_INITIALIZED);
+    LITE_CUBLAS_ERROR_INFO(CUBLAS_STATUS_ALLOC_FAILED);
+    LITE_CUBLAS_ERROR_INFO(CUBLAS_STATUS_INVALID_VALUE);
+    LITE_CUBLAS_ERROR_INFO(CUBLAS_STATUS_ARCH_MISMATCH);
+    LITE_CUBLAS_ERROR_INFO(CUBLAS_STATUS_MAPPING_ERROR);
+    LITE_CUBLAS_ERROR_INFO(CUBLAS_STATUS_EXECUTION_FAILED);
+    LITE_CUBLAS_ERROR_INFO(CUBLAS_STATUS_INTERNAL_ERROR);
+    LITE_CUBLAS_ERROR_INFO(CUBLAS_STATUS_NOT_SUPPORTED);
+    LITE_CUBLAS_ERROR_INFO(CUBLAS_STATUS_LICENSE_ERROR);
+#undef LITE_CUBLAS_ERROR_INFO
+    default:
+      return "unknown error";
+  }
+}
+
+}  // namespace cuda
+}  // namespace lite
+}  // namespace paddle
diff --git a/paddle/fluid/lite/kernels/CMakeLists.txt b/paddle/fluid/lite/kernels/CMakeLists.txt
index 1401be5e5dc4e520c09a4ffcab8902e43ae7712d..a7a894de125709dfdf79c0093779df5e654b60cb 100644
--- a/paddle/fluid/lite/kernels/CMakeLists.txt
+++ b/paddle/fluid/lite/kernels/CMakeLists.txt
@@ -1,2 +1,3 @@
 add_subdirectory(host)
 add_subdirectory(arm)
+add_subdirectory(cuda)
diff --git a/paddle/fluid/lite/kernels/cuda/CMakeLists.txt b/paddle/fluid/lite/kernels/cuda/CMakeLists.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6814f3f517b688853edea5a8c2e8c91181ae7742
--- /dev/null
+++ b/paddle/fluid/lite/kernels/cuda/CMakeLists.txt
@@ -0,0 +1 @@
+cc_library(mul_compute_cuda SRCS mul_compute.cc DEPS tensor_lite)
diff --git a/paddle/fluid/lite/kernels/cuda/mul_compute.cc b/paddle/fluid/lite/kernels/cuda/mul_compute.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c80851bf649edbad75cd447c0a77718116159fb4
--- /dev/null
+++ b/paddle/fluid/lite/kernels/cuda/mul_compute.cc
@@ -0,0 +1,15 @@
+// Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "paddle/fluid/lite/kernels/cuda/mul_compute.h"
diff --git a/paddle/fluid/lite/kernels/cuda/mul_compute.h b/paddle/fluid/lite/kernels/cuda/mul_compute.h
new file mode 100644
index 0000000000000000000000000000000000000000..e8d65a93daad66baa99e66a9171cb2fde5eb4e7d
--- /dev/null
+++ b/paddle/fluid/lite/kernels/cuda/mul_compute.h
@@ -0,0 +1,44 @@
+// Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+#include "paddle/fluid/lite/core/kernel.h"
+#include "paddle/fluid/lite/core/types.h"
+#include "paddle/fluid/lite/cuda/blas.h"
+
+namespace paddle {
+namespace lite {
+namespace kernels {
+namespace cuda {
+
+template <typename T>
+void mul_compute(const lite::cuda::Blas<float>& blas, const T* x, int x_h,
+                 int x_w, const T* y, int y_h, int y_w, T* out) {
+  blas.sgemm(CUBLAS_OP_N, CUBLAS_OP_N, x_w, x_h, y_w, nullptr, x, 0, y, 0,
+             nullptr, out, 0);
+}
+
+class MulCompute : public OpKernel<TARGET(kHost), PRECISION(kFloat)> {
+ public:
+  using param_t = operators::MulParam;
+
+  void Run() override {}
+
+  virtual ~MulCompute() = default;
+};
+
+}  // namespace cuda
+}  // namespace kernels
+}  // namespace lite
+}  // namespace paddle
diff --git a/paddle/fluid/lite/utils/macros.h b/paddle/fluid/lite/utils/macros.h
index 52ad44c7068ab29171a616c6f618d13d847cb998..1115c71cd24620b624d93820c892436110ba8880 100644
--- a/paddle/fluid/lite/utils/macros.h
+++ b/paddle/fluid/lite/utils/macros.h
@@ -19,3 +19,5 @@
   class__(const class__&) = delete;       \
   class__& operator=(const class__&) = delete;
 #endif
+
+#define LITE_UNIMPLEMENTED CHECK(false) << "Not Implemented";