variadic mixin templates and other stuff

[Martin Drasar]

On 20.4.2012 19:00, John Chapman wrote:
> On Friday, 20 April 2012 at 14:57:03 UTC, Martin Drasar wrote:
>> On 20.4.2012 16:09, Timon Gehr wrote:
>>
>> I tried but it still refuses to compile:
>>
>> string interfaceGuid(string ifaceName)
>> {
>>   return ifaceName ~ "Guid";
>> }
>>
>> mixin template EXPOSE_INTERFACES(T...)(T args)
> 
> Try this:
> 
>   mixin template EXPOSE_INTERFACES(T...)
> 
>> {
>>   void QueryInterface(ref IComponent comp, string guid)
>>   {
>>     foreach (arg; args)
> 
> and this:
> 
>       foreach (arg; T)
> 
>>     {
>>       if (mixin(interfaceGuid(arg)) == guid) {}
>>     }
>>   }
>> }
>>

Hi John,

thanks very much. That did the trick.

I am still wondering - why my previous code did not work? This is the
syntax I have adopted from variadic functions in TDPL. Why does it work
with functions and not mixin templates?

Thanks,
Martin