Note quite the standard, but [1] says under the "Notes" section: >Unless otherwise specified, all standard library objects that have been moved from are placed

Note quite the standard, but [1] says under the "Notes" section: >Unless otherwise specified, all standard library objects that have been moved from are placed in a valid but unspecified state. That is, only the functions without preconditions, such as the assignment operator, can be safely used on the object after it was moved from [1] https://en.cppreference.com/w/cpp/utility/move https://en.cppreference.com/w/cpp/utility/move