Improve readability

Author: yinggeh

src/tensorflow.cc

@@ -598,17 +598,15 @@ SetStringInputTensor(
   }
 #endif  // TRITON_ENABLE_GPU
 
-  auto callback = [](TRITONTF_Tensor* tensor, const size_t tensor_offset,
-                     const size_t element_idx, const char* content,
-                     const uint32_t len) {
-    TRITONTF_TensorSetString(tensor, tensor_offset + element_idx, content, len);
-  };
-  auto fn = std::bind(
-      callback, tensor, tensor_offset, std::placeholders::_1,
-      std::placeholders::_2, std::placeholders::_3);
-
+  std::vector<std::pair<const char*, const uint32_t>> str_list;
   err = ValidateStringBuffer(
-      content, content_byte_size, request_element_cnt, name, &element_idx, fn);
+      content, content_byte_size, request_element_cnt, name, &str_list);
+  // Set string values.
+  for (; element_idx < str_list.size(); ++element_idx) {
+    const auto& [addr, len] = str_list[element_idx];
+    TRITONTF_TensorSetString(tensor, tensor_offset + element_idx, addr, len);
+  }
+
   if (err != nullptr) {
     RESPOND_AND_SET_NULL_IF_ERROR(response, err);
     FillStringTensor(