44   Maybe(const Maybe& rhs);
47   Maybe(const Maybe<U>& rhs);  // NOLINT(google-explicit-constructor)
49   Maybe(Maybe&& rhs) noexcept;
52   Maybe(Maybe<U>&& rhs);  // NOLINT(google-explicit-constructor)
54   Maybe& operator=(const Maybe& rhs);
57   Maybe& operator=(const Maybe<U>& rhs);
59   Maybe& operator=(Maybe&& rhs) noexcept;
62   Maybe& operator=(Maybe<U>&& rhs);
99   Maybe& copy(const Maybe<U>& rhs);
102   Maybe& move(Maybe<U>&& rhs);
122 Maybe<T>::Maybe(const Maybe& rhs) : nothing_(rhs.nothing_) {  in Maybe()  argument
123   if (!rhs.nothing_) {  in Maybe()
124     new (&storage_) T(reinterpret_cast<const T&>(rhs.storage_));  in Maybe()
130 Maybe<T>::Maybe(const Maybe<U>& rhs) : nothing_(rhs.nothing_) {  in Maybe()  argument
131   if (!rhs.nothing_) {  in Maybe()
132     new (&storage_) T(reinterpret_cast<const U&>(rhs.storage_));  in Maybe()
137 Maybe<T>::Maybe(Maybe&& rhs) noexcept : nothing_(rhs.nothing_) {  in Maybe()  argument
138   if (!rhs.nothing_) {  in Maybe()
139     rhs.nothing_ = true;  in Maybe()
142     new (&storage_) T(std::move(reinterpret_cast<T&>(rhs.storage_)));  in Maybe()
143     rhs.destroy();  in Maybe()
149 Maybe<T>::Maybe(Maybe<U>&& rhs) : nothing_(rhs.nothing_) {  in Maybe()  argument
150   if (!rhs.nothing_) {  in Maybe()
151     rhs.nothing_ = true;  in Maybe()
154     new (&storage_) T(std::move(reinterpret_cast<U&>(rhs.storage_)));  in Maybe()
155     rhs.destroy();  in Maybe()
160 inline Maybe<T>& Maybe<T>::operator=(const Maybe& rhs) {
162   return copy(rhs);
167 inline Maybe<T>& Maybe<T>::operator=(const Maybe<U>& rhs) {
168   return copy(rhs);
173 Maybe<T>& Maybe<T>::copy(const Maybe<U>& rhs) {  in copy()  argument
174   if (nothing_ && rhs.nothing_) {  in copy()
177   } else if (!nothing_ && !rhs.nothing_) {  in copy()
179     reinterpret_cast<T&>(storage_) = reinterpret_cast<const U&>(rhs.storage_);  in copy()
182     nothing_ = rhs.nothing_;  in copy()
185     new (&storage_) T(reinterpret_cast<const U&>(rhs.storage_));  in copy()
188     nothing_ = rhs.nothing_;  in copy()
195 inline Maybe<T>& Maybe<T>::operator=(Maybe&& rhs) noexcept {
197   return move(std::forward<Maybe<T>>(rhs));
202 inline Maybe<T>& Maybe<T>::operator=(Maybe<U>&& rhs) {
203   return move(std::forward<Maybe<U>>(rhs));
208 Maybe<T>& Maybe<T>::move(Maybe<U>&& rhs) {  in move()  argument
209   if (nothing_ && rhs.nothing_) {  in move()
212   } else if (!nothing_ && !rhs.nothing_) {  in move()
214     rhs.nothing_ = true;  in move()
216         std::move(reinterpret_cast<U&>(rhs.storage_));  in move()
217     rhs.destroy();  in move()
221     rhs.nothing_ = true;  in move()
224     new (&storage_) T(std::move(reinterpret_cast<U&>(rhs.storage_)));  in move()
225     rhs.destroy();  in move()