Hello,
I have a situation which I can summarize as:
#include
#include
#include
#include
BOOST_PARAMETER_KEYWORD(tag, xx)
struct A{
template<typename ArgPack>
A(const ArgPack& arg):x_(arg[xx|0]){}
A(const A&){}
A& operator=(const A& that){
if(&that!=this){ x_ = that.x_; return *this; } }
unsigned x_;
};
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
B(const B& that):A((xx=that.x_)){} //requires knowledge of A's
members, not satisfactory.
};
Any suggestion, please?
