64   template <size_t size>
65   constexpr ArrayRef(T (&array)[size])  in ArrayRef()  argument
66     : array_(array), size_(size) {  in ArrayRef()
69   template <typename U, size_t size>
70   constexpr ArrayRef(U (&array)[size],
72     : array_(array), size_(size) {  in array_()
75   constexpr ArrayRef(T* array, size_t size)  in ArrayRef()  argument
76       : array_(array), size_(size) {  in ArrayRef()
80   constexpr ArrayRef(U* array, size_t size,
82       : array_(array), size_(size) {  in array_()
86       : array_(v.data()), size_(v.size()) {  in ArrayRef()
92       : array_(v.data()), size_(v.size()) {
127   size_type size() const { return size_; }  in size()  function
128   bool empty() const { return size() == 0u; }  in empty()