Best way to write constructor of a class who holds a STL container in C++11

Question

class Foo {
  std::vector data_;
};

Say Foo can only be constructed by make a copy (technically I mean a copy or move)

Answer 1

The complexity problem of the performance optimal solution mentioned in Howard Hinnant's answer for constructors taking multiple arguments would be solved by use of perfect forwarding:

template
Foo(A0 && a0) : data_(std::forward(a0)) {}

In case of more parameters, extend accordingly:

template
Foo(A0 && a0, A1 && a1, ...)
 : m0(std::forward(a0))
 , m1(std::forward(a1))
 , ...
 {}