lst-0019-book.cpp
// https://godbolt.org/z/s65GvY9xj
struct MyValue {
// … everything else as before
MyValue& operator=(const MyValue& right) {
if(this != &right) { // 1. check for self-assignment
// 2. Release previous resources; none here
// 3. element-wise transfer by assignment or similar
name_ = right.name_ + "-Assignment (previously " + name_ + ")";
/* number_ remains, and thus the original indentation */
}
return *this; // 4. return self
}
};