Eroare de compilare: In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:4: /usr/include/c++/4.8/bits/stl_algo.h: In instantiation of ‘_RandomAccessIterator std::__unguarded_partition(_RandomAccessIterator, _RandomAccessIterator, const _Tp&, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<thing*, std::vector<thing> >; _Tp = thing; _Compare = main()::__lambda1]’: /usr/include/c++/4.8/bits/stl_algo.h:2319:78: required from ‘_RandomAccessIterator std::__unguarded_partition_pivot(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<thing*, std::vector<thing> >; _Compare = main()::__lambda1]’ /usr/include/c++/4.8/bits/stl_algo.h:2360:62: required from ‘void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<thing*, std::vector<thing> >; _Size = int; _Compare = main()::__lambda1]’ /usr/include/c++/4.8/bits/stl_algo.h:5513:44: required from ‘void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = __gnu_cxx::__normal_iterator<thing*, std::vector<thing> >; _Compare = main()::__lambda1]’ user.cpp:91:28: required from here /usr/include/c++/4.8/bits/stl_algo.h:2287:35: error: no match for call to ‘(main()::__lambda1) (thing&, const thing&)’ while (__comp(*__first, __pivot)) ^ user.cpp:90:29: note: candidates are: sort(begin(v), end(v), [](thing& a, thing& b){ ^ In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:4: /usr/include/c++/4.8/bits/stl_algo.h:2287:35: note: bool (*)(thing&, thing&) <conversion> while (__comp(*__first, __pivot)) ^ /usr/include/c++/4.8/bits/stl_algo.h:2287:35: note: candidate expects 3 arguments, 3 provided user.cpp:90:49: note: main()::__lambda1 sort(begin(v), end(v), [](thing& a, thing& b){ ^ user.cpp:90:49: note: no known conversion for argument 2 from ‘const thing’ to ‘thing&’ In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:4: /usr/include/c++/4.8/bits/stl_algo.h:2290:34: error: no match for call to ‘(main()::__lambda1) (const thing&, thing&)’ while (__comp(__pivot, *__last)) ^ user.cpp:90:29: note: candidates are: sort(begin(v), end(v), [](thing& a, thing& b){ ^ In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:4: /usr/include/c++/4.8/bits/stl_algo.h:2290:34: note: bool (*)(thing&, thing&) <conversion> while (__comp(__pivot, *__last)) ^ /usr/include/c++/4.8/bits/stl_algo.h:2290:34: note: candidate expects 3 arguments, 3 provided user.cpp:90:49: note: main()::__lambda1 sort(begin(v), end(v), [](thing& a, thing& b){ ^ user.cpp:90:49: note: no known conversion for argument 1 from ‘const thing’ to ‘thing&’