Question

The error I’m getting:

error C2664: 'v8::FunctionTemplate::New' : cannot convert parameter 1 from 'v8::Handle<T> (__cdecl *)(const v8::Arguments &)' to 'v8::InvocationCallback' 

Relevant definitions:

typedef Handle<Value> (*InvocationCallback)(const Arguments& args);     template<class C> class V8ScriptClass { public:     template<class C, typename Rtype, typename Ptype1, Rtype (C::*FuncPtr)(Ptype1)>      void RegisterFunc(const char* const scriptname)     {         objtemplate->Set(             v8::String::New(scriptname),              v8::FunctionTemplate::New(             V8ScriptClass<C>::RelayCallback<C, Rtype, Ptype1, FuncPtr>                 ));     };  template<typename Rtype, typename Ptype1, Rtype (*FuncPtr)(Ptype1 param1)> static v8::Handle<v8::Value> RelayCallback(const v8::Arguments& args) {     std::cerr<<__FUNCTION__<<std::endl;     v8::HandleScope handle_scope;     return handle_scope.Close(toJSType( ((FuncPtr)(toCType(args[0]))) )); }; 

Looks to me like the typedef and the actual function signature are identical.

edit: forgot one declaration:

class EXPORT FunctionTemplate : public Template {  public:   /** Creates a function template.*/   static Local<FunctionTemplate> New(       InvocationCallback callback = 0,       Handle<Value> data = Handle<Value>(),       Handle<Signature> signature = Handle<Signature>()); 

Answer 1

I found the error. the RelayCallback template takes a static function pointer as argument, and I tried to instantiate it with a member function pointer. I just had to change it to a member function pointer template argument.