namespace NUnit.Framework.Constraints { public abstract class ConstraintOperator { protected int left_precedence; protected int right_precedence; public object LeftContext { get; set; } public object RightContext { get; set; } public virtual int LeftPrecedence { get; } public virtual int RightPrecedence { get; } public abstract void Reduce(ConstraintBuilder.ConstraintStack stack); protected ConstraintOperator(); } }