Re: [boost] Trouble caused by MPL's metafunction arity limit

Subject: Re: [boost] Trouble caused by MPL's metafunction arity limit
From: Stefan (mstefanro_at_[hidden])
Date: 2010-07-19 21:24:02

Larry Evans wrote:
> On 07/19/10 20:09, Stefan wrote:
>> Hello everyone. I'm working as a student on this year's GSoC and I 
>> have ran into a small problem while using MPL in my code.
>> In a nutshell, I have a class template which takes 6 template 
>> parameters, and I would like to use it with some MPL algorithms.
>> The problem is, MPL is configured by default to be capable of working 
>> with 5 template params only, so lambda expressions of my class won't 
>> work with MPL metafunctions.
> [snip]
> Try:
> 
>   http://svn.boost.org/svn/boost/sandbox/variadic_templates/
> 
> with gcc.  It *may* work with any number of arguments; however,
> I not real sure.  Many, but not all, of the mpl templates there
> have been replaced with ones taking any nunber or arguments.
> 
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That looks like a very nice library. However, I work on a Boost library, 
therefore I can't rely on features available on recent versions of 
compilers only (such as variadic templates).

Stefan