Fix bugs in framework/tensor_impl.h and polish framework/reader.cc

paddle/fluid/framework/reader.cc

@@ -25,8 +25,10 @@ void FileReader::ReadNext(std::vector<LoDTensor> *out) {
   if (out->empty()) {
     return;
   }
+
+  PADDLE_ENFORCE_EQ(out->size(), dims_.size());
   for (size_t i = 0; i < dims_.size(); ++i) {
-    auto &actual = out->at(i).dims();
+    auto &actual = (*out)[i].dims();
     auto &expect = dims_[i];
 
     PADDLE_ENFORCE_EQ(actual.size(), expect.size());

paddle/fluid/framework/tensor_impl.h

@@ -39,7 +39,7 @@ template <typename T>
 inline const T* Tensor::data() const {
   check_memory_size();
   PADDLE_ENFORCE(std::is_same<T, void>::value ||
-                     holder_->type().hash_code() == typeid(T).hash_code(),
+                     holder_->type() == std::type_index(typeid(T)),
                  "Tensor holds the wrong type, it holds %s",
                  this->holder_->type().name());
 
@@ -53,7 +53,7 @@ template <typename T>
 inline T* Tensor::data() {
   check_memory_size();
   PADDLE_ENFORCE(std::is_same<T, void>::value ||
-                     holder_->type().hash_code() == typeid(T).hash_code(),
+                     holder_->type() == std::type_index(typeid(T)),
                  "Tensor holds the wrong type, it holds %s",
                  this->holder_->type().name());
   return reinterpret_cast<T*>(reinterpret_cast<uintptr_t>(holder_->ptr()) +