libs/assign/test/basic.cpp Error: The name exception is ambiguous, exception and boost::exception

[Sergey.Sprogis@…]

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/assign/test/basic.cpp

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

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

namespace boost {

class exception;

} using namespace boost; #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 2 lines:

using namespace std; using namespace boost;

• Add std:: prefix to all 'vector', 'map', 'string' invocations.

[Aparna Kumta <aparna.kumta@…>]

PR: ​https://github.com/boostorg/assign/pull/11 has been submitted.