Repo created

libs/indexer/tree_structure.hpp

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+#pragma once
+
+#include "base/assert.hpp"
+
+#include <iostream>
+#include <string>
+
+namespace tree
+{
+template <class ToDo>
+bool LoadTreeAsText(std::istream & s, ToDo & toDo)
+{
+  std::string name;
+  s >> name;
+  ASSERT(!name.empty(), ("Error in classificator file"));
+  if (name == "{}")
+    return false;
+
+  // set key name
+  toDo.Name(name);
+
+  // load object itself
+  std::string strkey;
+  s >> strkey;
+  while (strkey != "+" && strkey != "-")
+    s >> strkey;
+
+  // load children
+  if (strkey == "+")
+  {
+    size_t i = 0;
+    while (true)
+    {
+      toDo.Start(i++);
+      bool const isContinue = LoadTreeAsText(s, toDo);
+      toDo.End();
+
+      if (!isContinue)
+      {
+        toDo.EndChilds();
+        break;
+      }
+    }
+
+    ASSERT(i <= 128, ("too many features at level = ", name));
+  }
+
+  return true;
+}
+}  // namespace tree