Hi all, I'm new to boost and I get the following compile error: ~/FileDesc.h:254: error: `class boost::signals2::signal<void ()(ProcessKit::FileDescBase&, M&), boost::signals2::optional_last_value<typename boost::function_traits<void ()(ProcessKit::FileDescBase&, M&)>::result_type>, int, std::less<int>, boost::function<void ()(ProcessKit::FileDescBase&, M&)>, typename boost::signals2::detail::extended_signature< boost::function_traits<void ()(ProcessKit::FileDescBase&, M&)>::arity, void ()(ProcessKit::FileDescBase&, M&)>::function_type, boost::signals2::mutex>::slot_type' is not a type ~/FileDesc.h:255: error: ISO C++ forbids declaration of `rReadSlot' with no type I have code like the following: template<typename M> class FileDesc : public FileDescBase { ... void setReadCallBack( boost::signals2::signal<void ( FileDescBase&, M&)
::slot_type const& rReadSlot) { ... } ... boost::signals2::signal<void ( FileDescBase&, M&) > mReadSignal; };
I have a feeling it has to do with how/when the templates and the metaprogramming stuff gets "unrolled/expanded" during compile time. However I really don't understand the metaprogramming stuff yet. Thanks.