destructors

2 files changed, 7 insertions, 0 deletions

diff --git a/vw/Classifier.h b/vw/Classifier.h
index bb61e1c2e..8e1508cf9 100644
--- a/vw/Classifier.h
+++ b/vw/Classifier.h
@@ -63,6 +63,8 @@ public:
     AddLabelDependentFeature(name, 1.0);
   }
 
+  virtual ~Classifier() {}
+
 protected:
   /**
    * Escape special characters in a unified way.
diff --git a/vw/Normalizer.h b/vw/Normalizer.h
index 5c06e1d47..0f927a145 100644
--- a/vw/Normalizer.h
+++ b/vw/Normalizer.h
@@ -10,6 +10,7 @@ namespace Discriminative
 class Normalizer {
 public:
   virtual void operator()(std::vector<float> &losses) const = 0;
+  virtual ~Normalizer() {}
 };
 
 class SquaredLossNormalizer : public Normalizer {
@@ -39,6 +40,8 @@ public:
         *it = 1.0 / losses.size();
     }
   }
+
+  virtual ~SquaredLossNormalizer() {}
 };
 
 class LogisticLossNormalizer : public Normalizer {
@@ -55,6 +58,8 @@ public:
       *it /= sum;
     }
   }
+
+  virtual ~LogisticLossNormalizer() {}
 };
 
 } // namespace Discriminative