What is the Utility of Parent Class Method Hiding in Inheritance?

[Vijay Nayar]

On Wednesday, 16 January 2019 at 17:01:06 UTC, Steven 
Schveighoffer wrote:
> On 1/14/19 2:30 PM, Neia Neutuladh wrote:
>> On Mon, 14 Jan 2019 09:10:39 +0000, Vijay Nayar wrote:
>>>       a.foo(1);  // issues runtime error (instead of calling
>>> A.foo(int))
>> 
>> Calling the function doesn't issue any sort of error. 
>> Overriding one
>> overload without overloading or explicitly aliasing in the 
>> rest issues a
>> compile-time error.
>> 
>> If you got a runtime error instead, please create a bug report.
>> 
>>> I ran into this the other day, where I had a function of the 
>>> same name
>>> in a child class, and found that all functions in the parent 
>>> of the same
>>> name now became hidden, unless I add an alias statement.
>> 
>> If the functions from the parent class are hidden but your 
>> code compiles,
>> please create a bug report.
>> 
>
> Well, for sure, the documentation needs to be updated!
>
> It was 2.068 that removed the HiddenFuncError, and made this a 
> compile error instead. If your compiler is that or newer, 
> definitely file a bug report.
>
> -Steve

It's a compile error, and it says that one should use alias as 
well.  I was just surprised and I hadn't thought of why this 
alias would be needed.  Based on the recommendation I found the 
language documentation, but there was no link to the article 
explaining the rationale.  But I'm glad I read that article, it 
makes a lot more sense now.