[Boost-users] [format] compilation error

18 Sep 2009

      Hi,

I'm using Boost 1.38 and Visual Studio 2008.
The following code

	#include 
	#include <ostream>
	#include <vector>

	using boost::format;
	using std::ostream;
	using std::vector;

	ostream& operator<<(ostream& os, const vector<int>& v)
	{
		os << '[';
		for(size_t i = 0; i < v.size(); ++i) {
			if(i > 0) os << ' ';
			os << v[i];
		}
		os << ']';
		return os;
	}

	void f()
	{
		vector<int> v;
		str(format("%1%") % v);

	}

fails to compile with the error message

	1>c:\libraries\boost\boost_1_38_0\boost\format\feed_args.hpp(100) : error C2679: binary '<<' : no 
operator found which takes a right-hand operand of type 'const std::vector<_Ty>' (or there is no 
acceptable conversion)
	1>        with
	1>        [
	1>            _Ty=int
	1>        ]

Why? How do I fix this?

Thank you,
Johan Råde