Constructor arguments from tuple

Question

Suppose I have a template which is parametrized by a class type and a number of argument types. a set of arguments matching these types are stored in a tuple. How can one pa

Answer 1

C++14 will add standard support for index_sequence:

template
struct foo {
  tuple args;
  T gen() { return gen_impl(std::index_sequence_for()); }
private:
  template 
  T gen_impl(std::index_sequence) { return T(std::get(args)...); }
};