Re: Solution for: throwing exception classes explicitly

Thank you Keith Halligan.

To keep the information in the signatures, we now use an empty
declarative substitute, so the developer can see from the header, what
he might have to catch.

#include "iostream"

#if ( GCC_VERSION > 30000 )
# define declare_throw(Exception) throw(Exception)
#else
# define declare_throw(Exception)
#endif

class Exception {
 public:
  Exception(int);
  void setErrNo(int i) declare_throw(Exception);
  int errNo;
};

Exception::Exception(int e) {
  errNo=e;
}

void Exception::setErrNo(int i) declare_throw(Exception) {
 auto Exception methodException(2);
  errNo=i;
  throw(methodException);
};

int main(char argc, char *argv[], char *env[]) {
  try {
   auto Exception mainException(1);
    mainException.setErrNo(42);
  } catch (Exception caughtException) {
    std::cout << "caught caughtException:" << caughtException.errNo <<
std::endl;
  }
}