fix build error

paddle/framework/CMakeLists.txt

 # ddim lib
-cc_library(ddim SRCS ddim.cc)
+cc_library(ddim SRCS ddim.cc DEPS eigen3)
 cc_test(ddim_test SRCS ddim_test.cc DEPS ddim)
 nv_test(dim_test SRCS dim_test.cu DEPS ddim)
 cc_test(tensor_test SRCS tensor_test.cc DEPS ddim)

paddle/framework/ddim.cc

@@ -222,9 +222,9 @@ std::ostream& operator<<(std::ostream& os, const DDim& ddim) {
 }
 
 template <int NDIMS>
-Eigen::DSizes<Eigen::DenseIndex, NDIMS> ToEigenDSizes(DDim dims) const {
-  int rank = paddle::framework::arity(dims);
-  PADDLE_ENFORCE(rank == NDIMS, "DDim and NDIMS must be same")
+Eigen::DSizes<Eigen::DenseIndex, NDIMS> ToEigenDSizes(const DDim& dims) {
+  int rank = arity(dims);
+  PADDLE_ENFORCE(rank == NDIMS, "DDim and NDIMS must be same");
   Eigen::DSizes<Eigen::DenseIndex, NDIMS> dsizes;
   for (int d = 0; d < rank; d++) {
     dsizes[d] = dims[d];

paddle/framework/ddim.h

@@ -93,7 +93,7 @@ int arity(const DDim& ddim);
 std::ostream& operator<<(std::ostream&, const DDim&);
 
 template <int NDIMS>
-Eigen::DSizes<Eigen::DenseIndex, NDIMS> ToEigenDSizes(DDim dims) const;
+Eigen::DSizes<Eigen::DenseIndex, NDIMS> ToEigenDSizes(const DDim& dims);
 
 }  // namespace framework
 }  // namespace paddle

paddle/framework/tensor.h

@@ -28,13 +28,6 @@ namespace framework {
 
 class Tensor {
  public:
-  template <typename T>
-  const T* data() const {
-    PADDLE_ENFORCE(holder_ != nullptr,
-                   "Tensor::data must be called after Tensor::mutable_data.");
-    return static_cast<const T*>(holder_->Ptr());
-  }
-
   template <typename T>
   T* data() const {
     PADDLE_ENFORCE(holder_ != nullptr,
@@ -60,14 +53,14 @@ class Tensor {
   size_t NumElements() const { return product(dims_); }
 
   template <typename T, size_t NDIMS>
-  typename TTypes<T, NDIMS>::Tensor Tensor::shaped(DDim new_dims) {
+  typename TTypes<T, NDIMS>::Tensor shaped(DDim new_dims) {
     Eigen::array<Eigen::DenseIndex, NDIMS> dims =
-        paddle::framework::ToEigenDSizes(new_dims);
+        paddle::framework::ToEigenDSizes<NDIMS>(new_dims);
     return typename TTypes<T, NDIMS>::Tensor(data<T>(), dims);
   }
 
   template <typename T, size_t NDIMS>
-  typename TTypes<T, NDIMS>::Tensor Tensor::tensor() {
+  typename TTypes<T, NDIMS>::Tensor tensor() {
     return typename TTypes<T, NDIMS>::Tensor(
         data<T>(), paddle::framework::ToEigenDSizes<NDIMS>(dims_));
   }
@@ -92,7 +85,7 @@ class Tensor {
 
   // const versions of all the methods above.
   template <typename T, size_t NDIMS>
-  typename TTypes<T, NDIMS>::ConstantTensor Tensor::tensor() const {
+  typename TTypes<T, NDIMS>::ConstantTensor tensor() const {
     return typename TTypes<T, NDIMS>::Tensor(
         data<T>(), paddle::framework::ToEigenDSizes<NDIMS>(dims_));
   }