Internal change

RELEASE.md

@@ -1,5 +1,8 @@
 # Unreleased
 
+* Added a helper function to get a vector of strings for the elements of a
+ tensor in order to aid in formatting.
+
 # Release 0.80.0
 
 ## Breaking Changes

tensorflow_federated/cc/core/impl/aggregation/core/tensor.h

@@ -20,9 +20,12 @@
 #include <cmath>
 #include <cstddef>
 #include <memory>
+#include <string>
 #include <type_traits>
 #include <utility>
+#include <vector>
 
+#include "absl/strings/str_cat.h"
 #include "absl/types/span.h"
 #include "tensorflow_federated/cc/core/impl/aggregation/base/monitoring.h"
 #include "tensorflow_federated/cc/core/impl/aggregation/core/agg_vector.h"
@@ -108,6 +111,13 @@ class Tensor final {
  return AggVector<T>(data_.get());
  }
 
+ // Returns the elements of the tensor as a vector of strings. This can be
+ // called on tensors of any type. The elements of the tensor are formatted as
+ // strings using absl::StrCat.
+ std::vector<std::string> AsStringVector() const {
+ DTYPE_CASES(dtype_, T, return TensorValuesToStringVector<T>());
+ }
+
  // Provides access to the (numerical) tensor data as an integral scalar.
  // Values are automatically casted and rounded.
  template <typename T, typename std::enable_if<
@@ -174,6 +184,18 @@ class Tensor final {
  return reinterpret_cast<const T*>(data_->data());
  }
 
+ template <typename T>
+ std::vector<std::string> TensorValuesToStringVector() const {
+ std::vector<std::string> vec(num_elements());
+ if (num_elements() > 0) {
+ AggVector<T> agg_vector = AsAggVector<T>();
+ for (auto [i, v] : agg_vector) {
+ vec[i] = absl::StrCat(v);
+ }
+ }
+ return vec;
+ }
+
  // Tensor data type.
  DataType dtype_;
  // Tensor shape.