[Boost-users] Solved, thanks!

Steven Watanabe wrote:

AMDG

er wrote:

...

3 copy constructors are shown below, on the last of which works. However it's really the first one that I'd like to get to work.

struct B : public A{ template<typename ArgPack> B(const ArgPack& arg):A(arg){}

B& operator=(const B& that){ if(&that!=this){ A::operator=(that); return *this; } }

//B(const B& that):A(that){} //no match for 'operator[]' in 'arg[(+<unnamed>::xx)->boost::parameter::keyword<T>::operator| [with Default = int, Tag = tag::xx](((const int&)((const int*)(&0))))]'|

//B(const B& that):A(static_cast<A>(that)){} //fails too

This is almost right. Cast to const A& instead of A.

In Christ, Steven Watanabe

Thanks!