On 6 November 2013 15:27, David Aldrich <David.Aldrich@xxxxxxxxxxxx> wrote: > Hi Jonathan > >> Can you simply instantiate the whole class, instead of the copy constructor? >> >> template class Matrix< std::complex<double> >; > > That solution worked. Thanks very much for your help. I raised this with the C++ standards committee and was pointed to a known issue in the standard: http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#1665 The proposed resolution would mean your explicit instantiation refers to the template constructor, so it seems that instantiating the whole class is the best way to instantiate the copy constructor.
