/// <summary>
/// visit constraint expression
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public override Expression <Func <T, bool> > VisitConstraint(RSqlQueryParser.ConstraintContext context)
{
if (context.group() != null)
{
return(context.group().Accept(this));
}
return(context.comparison()?.Accept(this));
}
