How do I make a call to what() on std::exception_ptr

Question

This is the code I have.

try
{
// code throws potentially unknown exception
}
catch (...)
{
    std::exception_ptr eptr =  std::current_exception();
             


        

Answer 1

try
{
   std::rethrow_exception(eptr);
}
catch (const std::exception& e)
{
   std::cerr << e.what() << std::endl;
}

http://en.cppreference.com/w/cpp/error/exception_ptr