#include <iostream>
#include <vector>
#include <string>
#include <typeinfo>

enum class TrafficLight : char { Red, Yellow, Green};
enum class ColorSpace;

enum class ColorSpace { Red, Green, Blue};

TrafficLight tl = TrafficLight::Red;
ColorSpace cs = ColorSpace::Red;

class Foo
{
  public:
    int a = 5;
    char *p = nullptr;
    std::string s = std::string("Hello");
    int Func(void) noexcept {return 42;};
};

// C++11
constexpr int square(int x)
{
  return x * x;
}

// C++14  N3652 non-trivial constexpr function
constexpr int cube(int x)
{
  auto i = x;
  i *= i;
  i *= i;
  return i;
}

// C++14 N3638
auto foobar(int x)
{
  if (x % 2)
    return x * 3;
  else
    return x * 2;
}

template<class T> using Vec = std::vector<T>;

int main()
{
  std::cout << "\n\nNow testing some C++11/14 features...\n\n";
  std::cout << "In function: " << __func__ << std::endl;

  Vec<long long> v {1LL, 2LL, 3LL, 4LL, 5LL};
  for (auto i : v)
    std::cout << i << " ";
  std::cout << std::endl;

  int array[square(3)] {1, 2, 3};
  for (auto &i : array)
    i *= 2;
  for (auto i : array)
    std::cout << i << " ";
  std::cout << std::endl << std::endl;

    // C++14 stuff
  auto one_billion = 1'000'000'000; // N3781
  auto bin_nine = 0b00001001;       // N3472
  
  std::cout << one_billion << std::endl;
  std::cout << bin_nine << std::endl;
  
  auto x = foobar(10);
  std::cout << "x = foobar(10), x = " << x << std::endl;
  std::cout << "type of x is " << typeid(x).name() << std::endl;

    // N3652
  int array2[cube(2)] {1, 2, 3};
  for (auto &i : array2)
    i *= 3;
  for (auto i : array2)
    std::cout << i << " ";
  std::cout << std::endl << std::endl;
  
    // C++ 14 N3653 example adapted from 
    // http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3653.html
  struct S { int a; const char* b; int c; int d = b[a]; };
  S ss = { 1, "ABCD" };
  std::cout << "ss.a = " << ss.a << ", ss.b = " << ss.b << ", ss.c = ";
  std::cout << ss.c << ", ss.d = " << ss.d << std::endl;

    // N3648 
  auto lam = [b = bin_nine]{std::cout << b << std::endl;};
  lam();  

  std::cout << "\n\n";
  
  std::cout << "****************************************************************\n";
  auto l = []{std::cout << "* If you see this text, your build and install was successful! *\n"; };
  l(); l(); l();
  std::cout << "****************************************************************\n";

  std::cout << std::endl;
  std::cout << "To use the new version, add this to your $PATH:\n\n";
  std::cout << "  /usr/local/gcc-7.1/bin\n\n";
  std::cout << "You should probably do this in your ~/.bashrc or ~/.bash_profile file.\n\n";

  return 0;
}