Extracting function param types using variadic templates

[Kirk McDonald]

Jarrett Billingsley wrote:
> "Tom S" <h3r3tic at remove.mat.uni.torun.pl> wrote in message 
> news:eigch3$ilf$1 at digitaldaemon.com...
>> Jarrett Billingsley wrote:
>>> Is there maybe some other way to get at the parameter types of a function 
>>> as a tuple, using variadic magic?
>> How about this stuff: 
>> http://www.dsource.org/projects/pyd/browser/trunk/infrastructure/meta ?
> 
> But that's basically using my third example, i.e.
> 
> void returnAndArg(T, U)(T delegate(U) dg){}
> returnAndArg(delegate int(bool b){ return 0; });
> 
> But with many specializations of the template, one for each number of 
> params.  The point of using variadic templates is removing the need to 
> manually create a specialization for each number of things you want in the 
> typelist.  With the automatic tuple deduction that I wish existed, the 
> FuncMeta.d module would become about 80 lines of code, and it would be able 
> to support any number of arguments. 
> 
> 

This was approximately the first thing I tried doing with variadic 
templates. I was very saddened to see that it doesn't work.

-- 
Kirk McDonald
Pyd: Wrapping Python with D
http://pyd.dsource.org