protected virtual Expression VisitIsNull(IsNullExpression isnull) { Expression expr = this.Visit(isnull.Expression); if (expr != isnull.Expression) { return(new IsNullExpression(expr)); } return(isnull); }
protected virtual bool CompareIsNull(IsNullExpression a, IsNullExpression b) { return(Compare(a.Expression, b.Expression)); }