Neal Becker wrote:
I'm a little confused about singleton usage. Can a singleton have a constructor?
I tried this:
using boost::basic_singleton;
struct Example : public basic_singleton<Example> { Example() { std::cout << "Hello\n"; } int Cnt() const { return 0; } };
int main() { Example::pointer ptr; std::cout << ptr->Cnt(); }
./Test1 0
It appears constructor wasn't run, because nothing was printed.
That's strange, your program works fine for me. The constructor should be being run on the line where you first create the pointer. If the constructor isn't being run, you should be getting some sort of runtime error when you try to dereference the pointer. What compiler are you using? Can you put a breakpoint inside the constructor to verify that it is never reached? Are you using the most recent version of the library? -Jason