Hi Rudolf [snip]
If we instantiate a state like this:
struct Active : public boost::statechart::simple_state< Active, PRX5StateMachine > { public: Active() : m_data("") {} ~Active() {}
std::string & Data() { return m_data;}
const std::string& Data() const { return m_data; }
private: std::string m_data; };
and use it in our code, everything compiles fine. As soon as we change the declaration to
class Active : public boost::statechart::simple_state< Active, PRX5StateMachine >
we get massive compiler errors, which look like this: [snip error message]
Is it mandatory to inherit from simple_state via a struct and not from a class?
As Igor has already pointed out (thanks, Igor!), you *should* be able to use class instead of struct, as long as you ensure that everything needed by Boost.Statechart is public. However, I'm a bit puzzled by your example code above, as it does not contain any reactions typedef. Is that intentional? If so, then just changing class to struct should not cause the errors you report. If the amount of code is small (< 10k) you can post it here otherwise please send me the code by private email, see below for instructions. By the way, please always add [statechart] to your subject line when asking questions regarding Boost.Statechart. This will usually ensure a much speedier response from me and also help other group members to filter the messages they are interested in. Regards, -- Andreas Huber When replying by private email, please remove the words spam and trap from the address shown in the header.