c10::guts::typelist::detail Namespace Reference

Maps a list of types into a list of values. More...

Data Structures
struct	map_types_to_values
struct	map_types_to_values< typelist< Types... > >
struct	type_

Detailed Description

Maps a list of types into a list of values.

Examples: // C++14 example auto sizes = map_types_to_values<typelist<int64_t, bool, uint32_t>>( [] (auto t) { return sizeof(decltype(t)::type); } ); // sizes == std::tuple<size_t, size_t, size_t>{8, 1, 4}

// C++14 example auto shared_ptrs = map_types_to_values<typelist<int, double>>( [] (auto t) { return make_shared<typename decltype(t)::type>(); } ); // shared_ptrs == std::tuple<shared_ptr<int>, shared_ptr<double>>()

// C++11 example struct map_to_size { template<class T> constexpr size_t operator()(T) { return sizeof(typename T::type); } }; auto sizes = map_types_to_values<typelist<int64_t, bool, uint32_t>>( map_to_size() ); // sizes == std::tuple<size_t, size_t, size_t>{8, 1, 4}