I would like to generate one call to a templated function for each type in an MPL sequence. Which is the best way to do this? E.g.: typedef vector<float,double,long double> SomeVector; template <typename T> write_size() { std::cout << sizeof(T) << " "; } Should somehow expand to: write_size<float>(); write_size<double>(); write_size<long double>(); I have managed to do this "manually" in a fairly general way, what I'm looking for is some part of boost which replaces my ForEach struct below or some nicer way of writing the same code: ============================================== struct WriteSize { template<typename T> void Call() {write_size<T>();} }; template <class It, class End> struct ForEach { template <class Func> static void Call(Func& func) { func.Call<typename It::type>(); ForEach<typename next<It>::type, End>::Call(func); } }; template <class End> struct ForEach<End, End> { template <class Func> static void Call(Func&) {} }; // Then I can generate the calls by WriteSize ws; ForEach<begin<SomeVector;>::type, end<SomeVector;>::type>::Call(ws); ============================================== -- System Developer TouchTable AB Tel: +46 (0)31 773 68 12 johan.torp@touchtable.se