Re: [Boost-users] Using assign::map_list_of for complex types

From: Thorsten Ottosen (thorsten.ottosen_at_[hidden])
Date: 2006-11-15 07:00:06

Hughes, James wrote:
> Hello all,
> 
> I've been trying to create an initiliser for the following (paraphrased)
> 
> struct data
> {
> Char *str;

const char*?

> Vector<int> stuff;
> };
> 
> 
> map<int, struct data> mapstuff = map_list_of
> (1, ("hello", list_of (3) (4) (2)),
> (3, ("goodbye", list_of (1) (3) );
> 
> Etc etc
> 
> However, this doesn't work, with a very complex compile error from
> assign. I've tried also...
> 
> map<int, struct data> mapstuff = map_list_of
> (1, {"hello", list_of (3) (4) (2) } ),   // note curly braces 
> (3, {"goodbye", list_of (1) (3) ) } );
> 
> But that doesn't work either.
> 
> Is it actually possible to do something like this, and if so, how?

I suspect that you have to provide a constructor for your data class:

template< class Range >
data( const char* str, const Range& r )
: str(str), stuff(boost::begin(r),boost::end(r))
{ }

-Thorsten