Call variadic function in C++ with a map of arguments

Suppose I have a variadic function like this:

template <typename... A>
void func(A... args)
{
    //Do stuff
}

And I have also a map like this:

enum Type{
    DOUBLE,
    STRING
};
std::map<std::string, Type> map;

So I want to iterate over the elements of the map and call the templated function with the specified types, like: map = {{"a", Type::STRING}, {"1.2", Type::DOUBLE}}; should call func("a", 1.2)

Any hints on how to do that?