New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/search/streets_matcher.hpp

@@ -0,0 +1,55 @@
+#pragma once
+
+#include "search/cbv.hpp"
+#include "search/geocoder_context.hpp"
+#include "search/token_range.hpp"
+
+#include <vector>
+
+namespace search
+{
+class FeaturesFilter;
+class QueryParams;
+
+class StreetsMatcher
+{
+public:
+  struct Prediction
+  {
+    size_t GetNumTokens() const { return m_tokenRange.Size(); }
+
+    // Tokens and misprints are better signals than probability here. For example in BA
+    // searching for "French 1700", gives 100% probabilty 'street' "Peatonal Juramento 1700".
+    bool SameForRelaxedMatch(Prediction const & rhs) const
+    {
+      return (m_withMisprints == rhs.m_withMisprints &&
+              GetNumTokens() == rhs.GetNumTokens());
+    }
+    bool IsBetter(Prediction const & rhs) const
+    {
+      // Tokens number on first place as the most valuable signal (even with misprints), see BarcelonaStreet.
+      if (GetNumTokens() != rhs.GetNumTokens())
+        return GetNumTokens() > rhs.GetNumTokens();
+
+      if (m_withMisprints != rhs.m_withMisprints)
+        return !m_withMisprints;
+
+      return m_prob > rhs.m_prob;
+    }
+
+    CBV m_features;
+    TokenRange m_tokenRange;
+    bool m_withMisprints = false;
+    double m_prob = 0.0;
+    uint64_t m_hash = 0;
+  };
+
+  static void Go(BaseContext const & ctx, CBV const & candidates, FeaturesFilter const & filter,
+                 QueryParams const & params, std::vector<Prediction> & predictions);
+
+private:
+  static void FindStreets(BaseContext const & ctx, CBV const & candidates,
+                          FeaturesFilter const & filter, QueryParams const & params,
+                          std::vector<Prediction> & prediction);
+};
+}  // namespace search