Re: [boost] [fusion] fusion sequence of non-copy-constructible types

7 Jul 2008

      AMDG

oliver wrote:
...
what i really wanna do is not to name the objects i put i the 
fusion vector.
they should be constructed in place and only be accessed through the 
fusion vector.
should look something like this:
typedef boost::fusion::vector<JobA, JobB, JobC> tJobs;
struct System
{
  System(Da& da) : fJobs(JobA(da), JobB(da, 2), JobC(da, 3))
  {}
private:
  tJobs  fJobs;
};
This exact syntax cannot be implemented without a copy constructor.
JobA(da) creates a temporary JobA which is then copied into the
fusion::vector.  You would have to use something like

fJobs(boost::in_place(da), boost::in_place(da, 2), boost::in_place(da, 3))

In Christ,
Steven Watanabe