Re: [Boost-users] [fusion][bind] How to bind a fusion sequence?

From: Peter Dimov (pdimov_at_[hidden])
Date: 2007-05-03 18:32:47

Christian Henning wrote:

...

>                , bind( &fusion::at_key< fields::_id_ >, _1 )

...

> test.cpp(43) : error C2783: 'result_of::at_key<const
> Sequence,Key>::type boost::fusion::at_key(const Sequence &)' : could
> not deduce template argument for 'Sequence'

Have you tried supplying the Sequence template parameter? Something like:

    bind( &fusion::at_key< fields::_id_, table_type >, _1 )

or, if this doesn't work:

    bind( &fusion::at_key< fields::_id_, table_type const >, _1 )

If this doesn't help, I'm afraid that your get_id wrapper is the best 
workaround. It's possible to cast &fusion::at_key<_id_> to the correct type, 
but I consider the get_id approach superior in general.