D seems interesting, but...

[foobar]

On Monday, 15 October 2012 at 17:53:15 UTC, Andrei Alexandrescu 
wrote:
> On 10/15/12 1:37 PM, foobar wrote:
>> On Monday, 15 October 2012 at 15:22:38 UTC, Andrei 
>> Alexandrescu wrote:
>> <snip>
>>>>
>>>> Yes, this is a nice thing Java, .NET and Python have.
>>>
>>> Wonder if a simple convention would suffice, e.g. every 
>>> module that
>>> wanna defines a moduleMain(string[] args) and then you have 
>>> one module
>>> main.d that has:
>>>
>>> void main(string[] args) { import wuddever; moduleMain(args); 
>>> }
>>>
>>>
>>> Andrei
>>
>> Great idea! But why add another (redundant) level of 
>> indirection?
>> It should go in the C main in druntime together with a 
>> mechanism to call
>> the correct D main, by e.g. reading the module name from the 
>> command line.
>
> Well there's a tension here: good language design generally 
> aims at providing few general features applicable to many use 
> cases. Encoding particular use cases in the language is 
> warranted by either disproportionate frequency in use or 
> disproportionate difficulty in implementing them within the 
> language. I don't think this particular feature scores very 
> highly in either category.
>
>
> Andrei

Well, it isn't so much in the language per se as it's (mostly?) 
in druntime.
We _already_ have code in druntime that calls the user supplied 
main function. All I'm suggesting is a very minor enhancement to 
that mechanism which does add useful convenience.
Seems to me the usefulness of this greatly outweighs the 
implementation cost.