On 14 November 2012 17:53, László Szécsi <szecsi@iit.bme.hu> wrote:
I understand that variadic templates have not been very portable and boost::unordered, which has a piecewise constructor implementation, does it completely differently and much more painfully.
Much of the complexity was from supporting the old variadic constructors for pairs, which were pretty problematic. Since that's been deprecated for some time (you need to define a macro to use it) I could probably remove it and that might lead to a simpler implementation. I suspect I'm the only person who ever used it anyway. Also, I didn't use the trick for constructing objects from tuples on compilers with variadic templates because I wasn't aware of it at the time. At some point I'll use it instead, but I'll still need the macros for compilers without full variadic support.