118 struct int_iterator {  struct
125     int_iterator() = default;
126     int_iterator(int i) :val(i) {}  in int_iterator()  function
129     bool operator==(int_iterator rhs) const { return val == rhs.val; }  in operator ==()  argument
130     bool operator!=(int_iterator rhs) const { return val != rhs.val; }  in operator !=()  argument
131     int_iterator operator++() { ++val; return *this; }  in operator ++()  argument
132     int_iterator operator++(int) {  in operator ++()  argument
142     int_iterator begin() const { return int_iterator{ 1 }; }  in begin()
143     int_iterator end() const { return {}; }  in end()
152     int_iterator begin() const { return int_iterator{ 1 }; }  in begin()
153     int_iterator end() const { return {}; }  in end()
170     int_iterator begin() const { return int_iterator{ 1 }; }  in begin()
171     int_iterator end() const { return {}; }  in end()
175     int_iterator begin() const { return int_iterator{ 1 }; }  in begin()
176     int_iterator end() const { return {}; }  in end()