Repo created

libs/indexer/feature_impl.hpp

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+#pragma once
+
+#include "indexer/scales.hpp"
+
+#include "base/assert.hpp"
+
+#include <string>
+
+namespace strings
+{
+class UniString;
+}
+
+namespace feature
+{
+int constexpr g_arrWorldScales[] = {3, 5, 7, scales::GetUpperWorldScale()};
+int constexpr g_arrCountryScales[] = {10, 12, 14, scales::GetUpperScale()};
+static_assert(std::size(g_arrWorldScales) == std::size(g_arrCountryScales));
+
+inline std::string GetTagForIndex(std::string const & prefix, size_t ind)
+{
+  ASSERT(ind < std::size(g_arrWorldScales) && ind < std::size(g_arrCountryScales), (ind));
+  return prefix + char('0' + ind);
+}
+
+uint8_t PopulationToRank(uint64_t p);
+uint64_t RankToPopulation(uint8_t r);
+}  // namespace feature