Improving version(...)

[Tomek Sowiński]

Dnia 18-10-2010 o 22:39:32 Lars T. Kyllingstad  
<public at kyllingen.nospamnet> napisał(a):

>>> version(VERSION1 || VERSION3)
>>> {
>>>  // ...
>>> }
>>
>> You can have it now:
>>
>> template isVersion(string ver) {
>>      enum bool isVersion = !is(typeof({
>>            mixin("version(" ~ ver ~") static assert(0);");
>>      }));
>> }
>>
>> static if (isVersion"VERSION1" || isVersion!"VERSION3") {
>>      ...
>> }
>>
>> If you're rushing to reply "That's hideous!", don't bother. I know.
> Actually, I think it's pretty cool.

Heh, thanks. Maybe with more templates it won't poke the eye:

static if (anySatisfy!(isVersion, "VERSION1", "VERSION2", "VERSION3", ...))

Still, it is a hack around a language's restriction. But what would be  
programming without one! :)

-- 
Tomek