initializer_list

C++11 STL

initializer_list

template<class T> class initializer_list;

initializer_list::initializer_list

initializer_list() noexcept;
//Construct empty initializer_list

// initializer_list example
#include <iostream>          // std::cout
#include <initializer_list>  // std::initializer_list
int main ()
{
    std::initializer_list<int> mylist;
    mylist = { 10, 20, 30 };
    std::cout << "mylist contains:";
    for (const auto& x: mylist) {
        std::cout << ' ' << x;
    }
    std::cout << '\n';
    return 0;
}

initializer_list::public member function

const T* begin() const noexcept;
const T* end() const noexcept;
size_t size() const noexcept;

non-member overloads

template<class T> const T* begin (initializer_list<T> il) noexcept;
template<class T> const T* end (initializer_list<T> il) noexcept;

// begin/end (initializer_list)
#include <iostream>          // std::cout
#include <initializer_list>  // std::initializer_list
template<class T> void print_list (std::initializer_list<T> il) {
    for (const T* it=begin(il); it!=end(il); ++it) std::cout << ' ' << *it;
    std::cout << '\n';
}
int main ()
{
    print_list ({10,20,30});
    return 0;
}