2011/1/23 Vivek <vivek@xmain.com>
2011/1/22 Vivek <vivek_at_[hidden]>
Or alternatively, is there a direct way to initialize a fusion vector?
IIUC, its ctor just do the job, not?
The problem is I don't know the arity or parameter types of the function being called. I just have a source of data (which can be simplified to TYPE data = data_source<TYPE>().pop();) and arbitrary functions being passed in.
Sorry if I missed your point...here comes an idea: Use Fusion's MPL sequences adapters, so you can have: typedef typename mpl::transform < parameter_types , from_data_source<mpl::_1> , mpl::back_inserter<mpl::vector<> > >::type data_source_provider; // a MPL sequence And invoke as: fs::invoke(f, data_source_provider()); where from_data_source<T> is defined as: template<class T> struct from_data_source { operator T() const { return data_source<T>().pop(); } }; Maybe your data_source<T>() is some singleton for the data source?