91         iterator where = this->find(key);  variable
93         if (where == this->end()) {
94 … where = this->emplace(std::piecewise_construct, std::forward_as_tuple(key), std::tuple<>()).first;
96         return where->second;
100         iterator where = this->find(key);  variable
102         if (where == this->end()) {
103 …where = this->emplace(std::piecewise_construct, std::forward_as_tuple(std::move(key)), std::tuple<…
105         return where->second;
109         iterator where = this->find(key);  in at()  local
111         if (where == this->end()) {  in at()
114         return where->second;  in at()
118         const_iterator where = this->find(key);  in at()  local
120         if (where == this->end()) {  in at()
123         return where->second;  in at()