Использование нововведений C++0x

#include <iostream>
 
template <typename T>
T Sum(T n, T m)
{
    return n+m;
}
 
int main()
{
    auto n=5.483, m=3.323;
    decltype(Sum(n,m)) sum=Sum(n,m);
    std::cout<<sum<<'\n';
    return 0;
}

std::map<std::string, std::vector<std::pair<int, std::vector<std::string>>>>::const_iterator it;

template<T1, T2>
void foo(T1 a, T2 b) {
  ??? c = a * b;
}

template <typename T1, typename T2>
[] (T1 a, T2 b) -> decltype(a + b)
{
   return a + b;
}

template <typename T1, typename T2>
auto (T1 a, T2 b) -> decltype(a + b)
{
   return a + b;
}

template<T1, T2>
auto foo (T1 a, T2, b) {
  return (a * b);
}

#include <iostream>
#include <vector>
#include <algorithm>
#include <iterator>
 
int main()
{
    std::vector<int> v;
    std::generate_n(std::back_inserter(v), 10, []{ return std::rand() % 9; });
 
    for(auto it = v.begin(); it != v.end(); ++it)
        std::cout << *it << " ";
 
    return 0;
}

template<class T1, class T2>
auto foo (T1 a, T2 b) {
  return (a * b);
}

template<class T1, class T2>
auto foo (T1 a, T2 b) -> decltype(a*b) {
  return (a * b);
}

template<class T1, class T2>
[] foo (T1 a, T2 b) -> decltype(a*b) {
  return (a * b);
}