text: //===----------------------------------------------------------------------===//
  //
  //                     The LLVM Compiler Infrastructure
  //
  // This file is dual licensed under the MIT and the University of Illinois Open
  // Source Licenses. See LICENSE.TXT for details.
  //
  //===----------------------------------------------------------------------===//
  
  // <iterator>
  // template <class C> constexpr auto empty(const C& c) -> decltype(c.empty());       // C++17
  // template <class T, size_t N> constexpr bool empty(const T (&array)[N]) noexcept;  // C++17
  // template <class E> constexpr bool empty(initializer_list<E> il) noexcept;         // C++17
  
  #include "test_macros.h"
  
  #if TEST_STD_VER <= 14
  int main () {}
  #else
  
  #include <iterator>
  #include <cassert>
  #include <vector>
  #include <array>
  #include <list>
  #include <initializer_list>
  
  template<typename C>
  void test_const_container( const C& c )
  {
      assert ( std::empty(c)   == c.empty());
  }
  
  template<typename T>
  void test_const_container( const std::initializer_list<T>& c )
  {
      assert ( std::empty(c)   == (c.size() == 0));
  }
  
  template<typename C>
  void test_container( C& c )
  {
      assert ( std::empty(c)   == c.empty());
  }
  
  template<typename T>
  void test_container( std::initializer_list<T>& c )
  {
      assert ( std::empty(c)   == (c.size() == 0));
  }
  
  template<typename T, size_t Sz>
  void test_const_array( const T (&array)[Sz] )
  {
      assert (!std::empty(array));
  }
  
  int main()
  {
      std::vector<int> v; v.push_back(1);
      std::list<int>   l; l.push_back(2);
      std::array<int, 1> a; a[0] = 3;
      std::initializer_list<int> il = { 4 };
  
      test_container ( v );
      test_container ( l );
      test_container ( a );
      test_container ( il );
  
      test_const_container ( v );
      test_const_container ( l );
      test_const_container ( a );
      test_const_container ( il );
  
      static constexpr int arrA [] { 1, 2, 3 };
      test_const_array ( arrA );
  }
  
  #endif
  