View Compilation Error

0_0_16500717_16831.cpp: In function 'Student cmp(Student, Student)':
0_0_16500717_16831.cpp:18:19: error: could not convert 'std::operator< <char, std::char_traits<char>, std::allocator<char> >((*(const std::basic_string<char>*)(& a.Student::name)), (*(const std::basic_string<char>*)(& b.Student::name)))' from 'bool' to 'Student'
     return a.name < b.name;
                   ^