/// <summary>
///
/// </summary>
/// <param name="isnull"></param>
/// <returns></returns>
protected virtual Expression VisitIsNull(IsNullExpression isnull)
{
Expression expr = this.Visit(isnull.Expression);
if (expr != isnull.Expression)
{
return(new IsNullExpression(expr));
}
return(isnull);
}
/// <summary>
///
/// </summary>
/// <param name="a"></param>
/// <param name="b"></param>
/// <returns></returns>
protected virtual bool CompareIsNull(IsNullExpression a, IsNullExpression b)
{
return(this.Compare(a.Expression, b.Expression));
}