[hackathon] An article about metaprogramming

[Mafi via Digitalmars-d]

On Wednesday, 29 April 2015 at 16:55:58 UTC, bearophile wrote:
> Mafi:
>
>> https://marfisc.wordpress.com/2015/04/29/using-d-templates-for-gamedev/
>>
>> What do you think? Any remarks?
>
>>The SDL_Event is a union. Accessing it is inherently unsafe for 
>>type consistency and memory safety. The SDL library mitigates 
>>this problem by adding a tag (the member type) which encodes 
>>which union-member is to be used.<
>
> In Rust you use the built-in tagged unions and call it a day...

Well, it is an already existing C library I am only adapting. And 
additionally the shonwn template encapsulates the whole outer 
loop as well.

>
>[...]
>
> The default should be aligned just like the other cases. Often 
> is a good idea to use "final switch" with enumerations.
> Probably there are ways to make that code more dry, using a 
> TypeTuple of pairs like ("SDL_QUIT", "quit").
>
> Bye,
> bearophile

I cannot use a final switch there because it is not enumerated 
type. The values are just constants. Moreover I want to skip 
unneeded labels and instead unify them into the default branch. 
This is impossible with a final switch.