project2/basics/aggregates/distinct.cpp


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#include <aggregate.h>

class Distinct : public SetAggregate {
	public:
		Distinct(ScriptNodePtr s) :
			SetAggregate(s)
		{
		}
		void reset() const
		{
			result.clear();
		}
		void pushValue(const VariableType & v, ExecContext *) const
		{
			result.insert(v);
		}
		void onResultValues(const SetAggregate::UseAgg & u) const
		{
			for (const VariableType & v : result) {
				u(v);
			}
		}
	private:
		mutable std::set<VariableType> result;
};

NAMEDFACTORY("distinct", Distinct, SetAggregateFactory);