Re: operator<< for std::map
On Oct 20, 1:28 am, mojmir <svobod...@gmail.com> wrote:
hello,
i am trying to dump whole map container to ostream like this:
template<typename T, typename U>
inline
std::ostream & operator<< (std::ostream & s, std::pair<T,U> const & p)
{
s << "<" << p.first << "," << p.second << ">";
return s;
}
Hm... I've just noticed that putting the above definition into
namespace std { ... } helps, so the problem might be somehow related
to ADL.
Tried to boil it down to the following, however "unsuccessfully"--it
still compiles:
namespace abc
{
class stream
{
};
template< typename T >
void
output(stream& s, T const& t)
{
s << t;
}
template< typename U, typename S >
class pair
{
};
}
template< typename U, typename S >
void operator<<(abc::stream&, abc::pair< U, S > const&)
{
}
int
main()
{
abc::stream stream;
abc::pair< char, int > p;
abc::output(stream, p);
}
--
Cheers,
Alex
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