std::initializer_list::size

From cppreference.com
size_type size() const;
(since C++11)

Returns the number of elements in the initializer list, i.e. std::distance(begin(), end()).

Contents

[edit] Parameters

(none)

[edit] Return value

the number of elements in the initializer list

[edit] Exceptions

noexcept specification:  
noexcept
  (since C++11)

[edit] Complexity

Constant