id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
10975,"The name exception is ambiguous, exception and std::exception.",Sergey.Sprogis@…,Joel de Guzman,"1. Description of the failure.

On Solaris 11.2  Oracle Studio 12.4 C++ compiler under -std=c++11 option produces the following error messages for libs/spirit/classic/test/match_tests.cpp  test.

""/usr/include/math.h"", line 215: Error: The name exception is ambiguous, exception and std::exception.
""/usr/include/math.h"", line 215: Error: The name exception is ambiguous, exception and std::exception.
"".../boost/exception/exception.hpp"", line 140: Error: The name exception is ambiguous, exception and std::exception.


and actually it produces similar error messages for small test like this:

 namespace boost {
  class exception;
 }
 using namespace boost;
 #include <algorithm>

or like this:

 class exception;
 using namespace std;
 #include <algorithm>

Note that in the original boost harness ""class exception;"" can be found inside: boost/exception/exception.hpp

2. Cause of the failure.


This is a C++ vs Unix or Boost vs Unix issue.

Standard Unix requires ""struct exception"" in the global namespace when
<math.h> is included. This conflicts with std::exception or boost::exception,
but only when there are using-declarations or using-directives that bring
std::exception or boost::exception into the global namespace.

When <math.h> is included, user code must avoid all of the following at file
scope (in the global namespace):
using namespace std;
using namespace boost;
using std::exception;
using boost::exception;

3. Possible Solution.

 - Remove  line:

     using namespace std;

 - Replace all 'cout' invocations with 'std::cout'
",Bugs,closed,To Be Determined,spirit,Boost 1.57.0,Problem,fixed,,