14.3.1

14.16

friend bool operator==(const StrBlob&, const StrBlob&);friend bool operator!=(const StrBlob&, const StrBlob&);

bool operator==(const StrBlob &lhs, const StrBlob &rhs){    return *lhs.data == *rhs.data;}bool operator!=(const StrBlob &lhs, const StrBlob &rhs){    return !(lhs == rhs);}

friend bool operator==(const StrBlobPtr&, const StrBlobPtr&);friend bool operator!=(const StrBlobPtr&, const StrBlobPtr&);

bool operator==(const StrBlobPtr &lhs, const StrBlobPtr &rhs){    return lhs.curr == rhs.curr;}bool operator!=(const StrBlobPtr &lhs, const StrBlobPtr &rhs){    return !(lhs == rhs);}

….

14.17

friend bool operator==(const Book&, const Book&);friend bool operator!=(const Book&, const Book&);

bool operator==(const Book &lhs, const Book &rhs){    return lhs.no_ == rhs.no_;}bool operator!=(const Book &lhs, const Book &rhs){    return !(lhs == rhs);}