template<typename... Ts>
using Type = std::variant<std::shared_ptr<T1>, std::shared_ptr<T2>, std::shared_ptr<Tn>>;
How I can do this using variadic templates and fold expressions?
I try something like this:
template<typename... Ts>
using Type = std::variant<((std::shared_ptr<Ts>), ...)>;`
but it doesn’t compile.
>Solution :
The following compiled for me
template<typename... Ts>
using Type = std::variant<std::shared_ptr<Ts>...>;
As stated here
A pattern followed by an ellipsis, in which the name of at least one parameter pack appears at least once, is expanded into zero or more comma-separated instantiations of the pattern, where the name of the parameter pack is replaced by each of the elements from the pack, in order
Here our pattern is std::shared_ptr<Ts>, which is expanded into std::shared_ptr<T1>, std::shared_ptr<T2>, std::shared_ptr<Tn>