Add unit test

paddle/framework/eigen_test.cc

+/*
+  Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+  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/framework/eigen.h"
+
+#include <gtest/gtest.h>
+
+#include "paddle/framework/tensor.h"
+
+TEST(Eigen, Tensor) {
+  using paddle::platform::Tensor;
+  using paddle::platform::EigenTensor;
+  using paddle::platform::make_ddim;
+
+  Tensor t;
+  float* p = t.mutable_data<float>(make_ddim({1, 2, 3}), CPUPlace());
+  for (int i = 0; i < 1 * 2 * 3; i++) {
+    p[i] = static_cast<float>(i);
+  }
+
+  EigenTensor::Type et = EigenTensor::From(t);
+  // TODO: check the content of et.
+}
+
+TEST(Eigen, Vector) {}
+
+TEST(Eigen, Matrix) {}

paddle/framework/tensor.h

@@ -20,7 +20,6 @@ limitations under the License. */
 #include <typeindex>
 #include "paddle/framework/ddim.h"
 #include "paddle/framework/enforce.h"
-#include "paddle/framework/tensor_types.h"
 #include "paddle/memory/memory.h"
 #include "paddle/platform/place.h"
 #include "unsupported/Eigen/CXX11/Tensor"
@@ -35,6 +34,18 @@ struct CastToPyBufferImpl;
 namespace framework {
 
 class Tensor {
+  template <bool less, size_t i, typename... args>
+  friend struct paddle::pybind::details::CastToPyBufferImpl;
+
+  template <typename T, size_t D, typename IndexType = Eigen::DenseIndex>
+  friend struct EigenTensor;
+
+  template <typename T, typename IndexType = Eigen::DenseIndex>
+  friend struct EigenVector;
+
+  template <typename T, typename IndexType = Eigen::DenseIndex>
+  friend struct EigenMatrix;
+
  public:
   Tensor() : offset_(0) {}
 
@@ -191,8 +202,6 @@ class Tensor {
   std::shared_ptr<Placeholder> holder_;  // holds the memory block if allocated.
   DDim dims_;
   size_t offset_;  // marks the begin of tensor data area.
-  template <bool less, size_t i, typename... args>
-  friend struct paddle::pybind::details::CastToPyBufferImpl;
 };
 
 }  // namespace framework