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From: David Abrahams (dave_at_[hidden])
Date: 2006-05-05 09:49:20

Joel de Guzman <joel_at_[hidden]> writes:

>> In the extension example, I see repeatedly the same patter
>> transferring the cv-ref qualification from one type to another. Can't
>> that be made simpler for extenders?
>> typedef typename mpl::if_<
>> is_const<Sequence>,
>> std::string const&,
>> std::string&>::type type;
> Can you point me to an example in the library, please?

This isn't from the library code. I copied it directly from the docs
at libs/fusion/doc/html/fusion/extension.html

Dave Abrahams
Boost Consulting

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