Compilation constants

[Phil Deets]

On Wed, 11 Nov 2009 08:50:48 -0500, bearophile <bearophileHUGS at lycos.com>  
wrote:

> In a C program I have a numeric constant SIZE (that is in [1,32]), that  
> I can define when I compile the code, like this:
> gcc -DSIZE=14 ...
>
> How can I do the same thing in D? The solution I have found is to put in  
> the D code:
> version(B1) const SIZE = 1;
> version(B2) const SIZE = 2;
> version(B3) const SIZE = 3;
> version(B4) const SIZE = 4;
> ...
> version(B14) const SIZE = 14;
> ...
>
> And then compile the D program with:
> dmd -version=B14 ...
> Or:
> ldc -d-version=B14 ...
>
> Do you know nicer ways to do this in D? (if there are no nicer ways, is  
> this simple feature worth adding to D?)
>
> Thank you, bye,
> bearophile

What I would probably do is generate a simple .d file right before you  
compile.