Re: [Boost-users] [fusion] adapted std::pair and ostream

Subject: Re: [Boost-users] [fusion] adapted std::pair and ostream
From: Joel de Guzman (joel_at_[hidden])
Date: 2011-07-19 19:40:20

On 7/20/2011 7:21 AM, Nathan Ridge wrote:
> 
>>> But this seems to be in contradiction with the docs, which say [1]
>>> (emphasis mine):
>>>
>>> The **global** |operator<<| has been overloaded for generic
>>> output streams such that Sequence
>>> <http://www.boost.org/doc/libs/1_47_0/libs/fusion/doc/html/fusion/sequence.html>(s) are
>>> output by recursively
>>> calling |operator<<| for each element.
>>>
>>> Perhaps the authors were relying on ADL to find operator<<,
>>> but overlooking the fact that not all sequences would be in the
>>> boost::fusion namespace?
>>
>> Thanks. That's certainly not correct. Adapted sequences in other
>> namespaces can't avail of that. I just fixed the docs to avoid
>> further confusion.
> 
> Why not just overload operators << and >> in the global namespace,
> as the docs say, rather than overloading them in the boost::fusion 
> namespace?

I didn't want to pollute the global namespace. At one point, I only
had native fusion sequences. However, in light of recent events,
where more foreign sequences have been adapted, and some of those
with namespaces that cannot be touched (e.g. std), this is indeed
seems necessary. I'll take that into consideration.

Regards,
-- 
Joel de Guzman
http://www.boostpro.com
http://boost-spirit.com