Hello, My name is Eoin O'Callaghan I've run into a difficulty with the Boost Statechart library as I was porting my code from MSVC-7.1 to work with MinGW also. MinGW gives an error regarding the ctx parameter used with non simple states when the state is a template class; MinGWFail.cpp:24: error: expected `)' before "ctx" MinGWFail.cpp:29: error: expected constructor, destructor, or type conversion before '(' token I've attached a small file which replicates the problem. Note that if the content state is a simple_state then both MSVC-7.1 and MinGW compile without errors. Hope someone can make some sense of this, thanks the the author for making such an excellent library free for everyone. (Indeed thanks to all those involved in Boost :) ) Kind regards, Eoin. #include #include #include #include #include #include template<class P> class content; class parser : public boost::statechart::state_machine { public: parser(); virtual ~parser() {} }; template<class P> struct content : boost::statechart::state { public: content(my_context ctx); virtual ~content() {} }; template<class P> content<P>::content(my_context ctx) : my_base(ctx) {}