[boost] Passing result of boost::assign::list_of/map_list_of to ctor

From: Daveus, Fredrik (Fredrik.Daveus_at_[hidden])
Date: 2007-06-13 06:32:04

I want to pass the result of a map_list_of call as an argument to a
class ctor, but the 
only way I've managed to do this is by using some stuff from the
assign_detail namespace.
 
Is there any other (more elegant) way of achieving this?
 
See example code below.
 
Thanks/Rgds,
Fredrik 
 

class A {
public:
    typedef map<int, int> map_type;
 
// Simply using the container iterator type doesn't seem to work since
one needs the 
// iterator of the impl_type defined in assign_detail::generic_list
which is 
// publicly exposed as generic_list<T>::const_iterator.
    typedef boost::assign_detail::generic_list<std::pair<int, int>
>::const_iterator c_it;

    A(c_it _first, c_it _last)
        : m_map(_first, _last) { }
private:
    map<int, int> m_map;
};

void test()
{
    A a(map_list_of(1,1)(2,2));
} 
 
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