View Compilation Error

0_0_37716851_6140.cpp: In member function 'size_t pair_hash::operator()(const std::pair<_T1, _T2>&) const':
0_0_37716851_6140.cpp:38:58: error: expected ';' before ')' token
   return hash<T1>()(pair.first) ^ hash<T2>()(pair.second));
                                                          ^
0_0_37716851_6140.cpp:38:58: error: expected primary-expression before ')' token