CODEWITHSUNDEEP
c++templatesc++11
Graznarak
Graznarak

Reputation: 3692

Get typedef from parameter pack

I have a struct of this form:

template <typename T>
struct X
{
    using value = T;
};

I am passing one or more of these to a template function like this:

template <typename... Ts>
void Func(Ts... ts);

What I really want is to explicitly list the Xs and have the function parameter types be the values of the Ts. How would I do that?

Upvotes: 8

Views: 294

Answers (1)

R Sahu
R Sahu

Reputation: 206607

The following works for me.

template <typename T>
struct X
{
    using value = T;
};

template <typename T>
struct Y
{
    using value = T*;
};

template <typename... Ts>
void Func(typename Ts::value... ts)
{
}

int main()
{
   Func<X<int>, Y<double>>(10, nullptr);
}

Upvotes: 10

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