What is the easiest way to initialize a std::vector with hardcoded elements?

Question

I can create an array and initialize it like this:

int a[] = {10, 20, 30};

How do I create a std::vector and initialize it sim

Answer 1

In C++11:

#include 
using std::vector;
...
vector vec1 { 10, 20, 30 };
// or
vector vec2 = { 10, 20, 30 };

Using boost list_of:

#include 
#include 
using std::vector;
...
vector vec = boost::assign::list_of(10)(20)(30);

Using boost assign:

#include 
#include 
using std::vector;
...
vector vec;
vec += 10, 20, 30;

Conventional STL:

#include 
using std::vector;
...
static const int arr[] = {10,20,30};
vector vec (arr, arr + sizeof(arr) / sizeof(arr[0]) );

Conventional STL with generic macros:

#include 
#define ARRAY_SIZE(ar) (sizeof(ar) / sizeof(ar[0])
#define ARRAY_END(ar) (ar + ARRAY_SIZE(ar))
using std::vector;
...
static const int arr[] = {10,20,30};
vector vec (arr, ARRAY_END(arr));

Conventional STL with a vector initializer macro:

#include 
#define INIT_FROM_ARRAY(ar) (ar, ar + sizeof(ar) / sizeof(ar[0])
using std::vector;
...
static const int arr[] = {10,20,30};
vector vec INIT_FROM_ARRAY(arr);