Terje Slettebų wrote:
By the way, just for fun. Adding the following output operator for
arrays,
to the header I gave in the previous posting:
-------
|O|X|O|
-------
|X|X|O|
-------
|O|O|X|
-------
"Shall we play a game?" :)
Sure thing :-)
I guess you maybe got the "War Games" reference? :)
Don't know what this reference is, but played that game in school.
2. I think that we better have separate headers for stl containers, like
suggested in my original email (<boost/io/vector.hpp>, etc). That's
because I'd like to output maps, but would not like to include <map>
when I need to output a vector.
Heh, just before I got this posting, I had added the following comment in
the header:
[...]
We're in total agreement until now.
I'll get back to your other comments, I just need to look more into
how it might be done.
Maybe you know a better solution already, but thinking about per-conainer
format is arrive to:
We basically need the following (note that "..." are no metacharacters)
template<class charT, template <...> class container>
class basic_composite_io {
int get_pword_index();
}
template<class charT>
int basic_composite_io<charT, vector<...> >::get_pword_index() {
static int i = ios_base::xalloc();
return i;
}
Since we can specialize on template name, we have to fake that:
template<class charT, class T, class A>
int basic_composite_io<charT, vector<T, A> >::get_pword_index() {
static int i = get_vector_pword_index();
return i;
}
Why can't we afford to create a function for each supported container,
make it call xalloc, and return that value. Not very nice, but works.
Another alternative is to create custom 'xalloc' which takes a string,
and does not allocate new index if an index for that string is already
allocated.
template<class charT, class T, class A>
int basic_composite_io<charT, vector<T, A> >::get_pword_index() {
static int i = xalloc("std::vector");
return i;
}
Would this be sufficient?
- Volodya
_______________________________________________
Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
