1 files changed, 26 insertions, 0 deletions
diff --git a/project2/basics/aggregates/countDistinct.cpp b/project2/basics/aggregates/countDistinct.cpp
new file mode 100644
index 0000000..b471911
--- /dev/null
+++ b/project2/basics/aggregates/countDistinct.cpp
@@ -0,0 +1,26 @@
+#include <aggregate.h>
+
+class CountDistinct : public ValueAggregate {
+	public:
+		CountDistinct(ScriptNodePtr s) :
+			ValueAggregate(s)
+		{
+		}
+		void reset() const
+		{
+			result.clear();
+		}
+		void pushValue(const VariableType & v) const
+		{
+			result.insert(v);
+		}
+		VariableType resultValue() const
+		{
+			return result.size();
+		}
+	private:
+		mutable std::set<VariableType> result;
+};
+
+DECLARE_LOADER("countdistinct", CountDistinct);
+