#include <iostream>
#include <tr1/array>
#include <boost/lambda/lambda.hpp>

struct output_array_value
{
public:
	output_array_value(std::ostream &out):
		out_(out)
	{
	}
 
	template < typename ValueType >
	void operator()(ValueType const &value)
	{
		out_ << value << " ";
	}
 
private:
	std::ostream &out_;
};
 
 
template < typename ValueType, unsigned int Size >
std::ostream& operator << (std::ostream &out, std::tr1::array < ValueType, Size > const &array)
{
	using namespace boost::lambda;
 
	out << "[ ";
	//std::for_each(array.begin(), array.end(), out << _1 << " "); // the problematic line
	std::for_each(array.begin(), array.end(), output_array_value(out));
	out << "]";
 
	return out;
}
 
 
 
int main()
{
	std::tr1::array < float, 3 > vec3;
	std::tr1::array < std::tr1::array < float, 4 > , 4 > mat4x4;
 
	std::cout << vec3 << std::endl; // always ok
	std::cout << mat4x4 << std::endl; // only ok when the lambda line above is NOT used; otherwise, it fails to compile
 
	return 0;
}