The error message "std::unorderedmap' with Key class" indicates that there is an issue with using an object of a particular class as a key in a std::unorderedmap. The error message is usually accompanied by a note that the compiler has deleted a function. This is because the use of the class as a key requires the class to have a valid hash function and a valid equality operator. If the class does not define these functions, then the compiler will automatically delete the default functions. The error message is a way of telling the programmer that they need to define these functions in order to use the class as a key in the unordered_map.
Asked: 2022-10-24 11:00:00 +0000
Seen: 10 times
Last updated: Jun 06 '21