[boost] [Boost.Config] Detect compiler support for std::current_exception

Hi all, I'm working on a Boost.Exception issue [1] and I need to detect compiler support of std::current_exception. In the issue there is a suggestion to use #if __cplusplus > 199711L but that does not work for my use case (VS2015 reports __cplusplus = 199711L). Is it possible to add a config macro for this? Or is there a good enough existing macro I can use? Thanks in advance [1] https://github.com/boostorg/exception/issues/10