poc-misc/FormulaEnginePoC/FormulaEngine/FilterFormula.cs

using System.Collections.Generic;
using System.Linq;

namespace FormulaEnginePoC.FormulaEngine
{
    public abstract class FilterFormula<TSource> : CalcFormula<TSource, bool>
    {
        protected FilterFormula(string userExpression) : base(userExpression)
        {
        }

        public IEnumerable<TSource> Filter(IEnumerable<TSource> source)
        {
            return source.Where(CompiledFunc);
        }
    }
}