mrw-cxx/src/mrw/checkcxx11.hxx

/*! @file

    @id $Id$
*/
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#ifndef __MRW__CHECKCXX11__
#define __MRW__CHECKCXX11__

// check if code is compiled with a new C++11 compiler
// otherwise there is a fallback wich makes everything much more compliacted
#  ifndef MRW__OLD_PRE11_COMPILER
#    if __cplusplus < 201103L
       /// Code is compiled with an old non C++11 standard compliant compiler
       /** There are workarounds for old non C++11 compatible
           compilers. These workarounds are deprecated, but will remain until
            most compilers fully support C++11. So this workaround will be
            removed in future releases, when support for C++11 is more
            common. Only rely on this workaround, if you really have to. */
#      define MRW__OLD_PRE11_COMPILER
#      warning you need a C++11 compliant compiler, on gcc use option -std=c++11
#      warning emulating C++11 - this changes the way you use the library
#      warning this is deprecated and will be removed in future releases
#      warning refere to the library documentation for more details
#    endif
#  endif

#  if __cplusplus==1
#    warning your compiler has a know bug, please upgrade to gcc >= 4.7
#    warning see __cplusplus in http://gcc.gnu.org/gcc-4.7/changes.html
#  endif


#  ifdef MRW__OLD_PRE11_COMPILER
// __cplusplus==1 is a known bug in gcc 4.6.3
#    if __cplusplus<200300L && __cplusplus!=1
#      include <boost/shared_ptr.hpp>
namespace std {
  // there is no std::shared_ptr in pre C++11 compilers, so we use the
  // one from the boost library as a 1:1 replacement
  template <typename T> class shared_ptr: public boost::shared_ptr<T> {
    public:
      explicit shared_ptr(): boost::shared_ptr<T>() {}
      explicit shared_ptr(T* p): boost::shared_ptr<T>(p) {}
  };
};
#    endif
#  endif

#endif