on Wed Jun 03 2009, Eric Niebler <eric-AT-boostpro.com> wrote:
Would it go faster if the compiler didn't have to create the special member functions? Could we use the declared-but-not-defined trick to suppress their generation and speed up template instantiations for metafunctions?
At BoostCon, a few of us hacked on a C++0x scheme that did exactly one class template instantiation per metaprogram. Here's my work: http://github.com/techarcana/mpl0x And one of my colleagues': https://svn.boost.org/trac/boost/browser/sandbox/ftmpl Unfortunately because of GCC's dumb linear list search, it spends most of its time looking up function template specializations and we get almost no speedup. But this approach could be a big win with a smarter compiler implementation. -- Dave Abrahams BoostPro Computing http://www.boostpro.com