[boost] Boost 1_31 - Problem with Lambda, UnNamed namespaces VC7.1

9 Oct 2004

      I have searched the list archive and have not found anything on this
subject.

I have what looks like to be an issue with MSVC7.1 and unnamed
namespaces
(the _1 _2 and _3 are in unnamed namespaces in boost::lambda)

See below:

#include <boost/bind.hpp>
#include <boost/Lambda/lambda.hpp>

// adding my code to the boost::lambda namespace
// below works fine
namespace boost
{
	namespace lambda 
	{
		void MyFunction()
		{
			using namespace std;
			list<int> v;
			v.push_back(1);
			v.push_back(2);
			v.push_back(3);
			v.push_back(4);
			v.push_back(5);

			// Line below works
			for_each(v.begin(), v.end(), std::cout << _1 <<
' ');
		}
	}	 
}

// Now global namespace
void MyFunction()
{
	using namespace std;
	using namespace boost;
	using namespace boost::lambda;

	list<int> v;
	v.push_back(1);
	v.push_back(2);
	v.push_back(3);
	v.push_back(4);
	v.push_back(5);

	// Line below fails with a "error C2872: '_1' : ambiguous
symbol"
	for_each(v.begin(), v.end(), std::cout << _1 << ' ');

	// This line DOES work
	for_each(v.begin(), v.end(), std::cout << boost::lambda::_1 << '
');
}

Has anyone else run into this? Also- I do not have the current CVS tree
handy (I am using 1.31), is this a problem on 1.32? If it is
workedaround in some fashion, I can just qualify every _1 and _2 until
1.32 comes out.

Thanks for any help or suggestions

Brian Braatz