HelenOS sources

index_of_type     286 uspace/lib/cpp/include/__bits/tuple/tuple.hpp         struct index_of_type: index_of_type<I + 1, U, Ts...>
index_of_type     290 uspace/lib/cpp/include/__bits/tuple/tuple.hpp         struct index_of_type<I, T, T, Ts...>: std::integral_constant<std::size_t, I>