C++ variadic template with tuple as template parameter

Question

I would like to have something like this (warning: invalid code):

template<std::tuple<typename T, typename... Args>>
class nDimensionalPoint

This way, I could work with n-dimensional points one dimension at a time. Of course, I could avoid the std::tuple part by declaring template<typename T, typename... Args> and simply passing the coordinates in each dimension in a vector of its own, but that creates the following difficulty: One needs to somehow bind together the coordinates hidden in args.... Therefore, I would like a cleaner way of making it explicit that the underlying type is variadic tuple. How this could be done?

songyuanyao · Accepted Answer · 2021-07-13 05:43:51Z

3

You might declare it as partial specialization as

template<typename>
class nDimensionalPoint;
template<typename T, typename... Args>
class nDimensionalPoint<std::tuple<T, Args...>> {};

then use it like

nDimensionalPoint<std::tuple<int, char>> dp ...;

answered Jul 13, 2021 at 5:43

songyuanyao

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