#include <aggregate.h>

class Count : public ValueAggregate {
	public:
		Count(ScriptNodePtr s) :
			ValueAggregate(s),
			c(0)
		{
		}
		void reset() const
		{
			c = 0;
		}
		void pushValue(const VariableType & v, ExecContext *) const
		{
			if (!v.isNull()) {
				c += 1;
			}
		}
		VariableType resultValue() const
		{
			return c;
		}
	private:
		mutable int c;
};

DECLARE_LOADER("count", Count);