The future of UDAs.

[Andrei Alexandrescu]

On 11/29/12 12:07 PM, Max Samukha wrote:
> On Thursday, 29 November 2012 at 15:23:32 UTC, Andrei Alexandrescu wrote:
>> On 11/29/12 10:17 AM, Max Samukha wrote:
>>> On Thursday, 29 November 2012 at 14:17:40 UTC, Andrei Alexandrescu
>>> wrote:
>>>>
>>>> I think this entire approach is unprincipled (aside from solving a
>>>> problem that's not urgent and not important).
>>>
>>> Could you explain how did you determine its urgency and importance
>>> please?
>>
>> We have solved instances of the problem in the standard library.
>> Please no more trick questions, thanks.
>
> The standard library does not represent the bulk of D code. Requirements
> for client code are different from those for the standard library.
> Please don't base your opinion of importance exclusively on the
> experience of a limited group of D users.

There are plenty of patterns for solving order of initialization issues 
in libraries, known since time immemorial. Requiring a library 
initialization call would be the simplest (albeit not the most elegant). 
The Monostate and Singleton patterns also come to mind.

This is just not something that has no solution. Better solutions are 
always welcome, but keeping a baseline is always useful.


Andrei