In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
from /usr/include/c++/11/bits/char_traits.h:39,
from /usr/include/c++/11/ios:40,
from /usr/include/c++/11/ostream:38,
from /usr/include/c++/11/iostream:39,
from Main.cc:1:
/usr/include/c++/11/bits/predefined_ops.h: In instantiation of ‘bool __gnu_cxx::__ops::_Iter_comp_val<_Compare>::operator()(_Iterator, _Value&) [with _Iterator = __gnu_cxx::__normal_iterator<HuffmanNode**, std::vector<HuffmanNode*> >; _Value = HuffmanNode*; _Compare = std::greater<HuffmanNode>]’:
/usr/include/c++/11/bits/stl_heap.h:139:48: required from ‘void std::__push_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare&) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<HuffmanNode**, std::vector<HuffmanNode*> >; _Distance = long int; _Tp = HuffmanNode*; _Compare = __gnu_cxx::__ops::_Iter_comp_val<std::greater<HuffmanNode> >]’
/usr/include/c++/11/bits/stl_heap.h:215:23: required from ‘void std::push_heap(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<HuffmanNode**, std::vector<HuffmanNode*> >; _Compare = std::greater<HuffmanNode>]’
/usr/include/c++/11/bits/stl_queue.h:651:16: required from ‘void std::priority_queue<_Tp, _Sequence, _Compare>::push(std::priority_queue<_Tp, _Sequence, _Compare>::value_type&&) [with _Tp = HuffmanNode*; _Sequence = std::vector<HuffmanNode*>; _Compare = std::greater<HuffmanNode>; std::priority_queue<_Tp, _Sequence, _Compare>::value_type = HuffmanNode*]’
Main.cc:45:21: required from here
/usr/include/c++/11/bits/predefined_ops.h:196:30: error: no match for call to ‘(std::greater<HuffmanNode>) (HuffmanNode*&, HuffmanNode*&)’
196 | { return bool(_M_comp(*__it, __val)); }
| ~~~~~~~^~~~~~~~~~~~~~
In file included from /usr/include/c++/11/string:48,
from /usr/include/c++/11/bits/locale_classes.h:40,
from /usr/include/c++/11/bits/ios_base.h:41,
from /usr/include/c++/11/ios:42,
from /usr/include/c++/11/ostream:38,
from /usr/include/c++/11/iostream:39,
from Main.cc:1:
/usr/include/c++/11/bits/stl_function.h:389:7: note: candidate: ‘constexpr bool std::greater<_Tp>::operator()(const _Tp&, const _Tp&) const [with _Tp = HuffmanNode]’
389 | operator()(const _Tp& __x, const _Tp& __y) const
| ^~~~~~~~
/usr/include/c++/11/bits/stl_function.h:389:29: note: no known conversion for argument 1 from ‘HuffmanNode*’ to ‘const HuffmanNode&’
389 | operator()(const _Tp& __x, const _Tp& __y) const
| ~~~~~~~~~~~^~~
In file included from /usr/include/c++/11/bits/stl_algobase.h:71,
from /usr/include/c++/11/bits/char_traits.h:39,
from /usr/include/c++/11/ios:40,
from /usr/include/c++/11/ostream:38,
from /usr/include/c++/11/iostream:39,
from Main.cc:1:
/usr/include/c++/11/bits/predefined_ops.h: In instantiation of ‘constexpr bool __gnu_cxx::__ops::_Iter_comp_iter<_Compare>::operator()(_Iterator1, _Iterator2) [with _Iterator1 = __gnu_cxx::__normal_iterator<HuffmanNode**, std::vector<HuffmanNode*> >; _Iterator2 = __gnu_cxx::__normal_iterator<HuffmanNode**, std::vector<HuffmanNode*> >; _Compare = std::greater<HuffmanNode>]’:
/usr/include/c++/11/bits/stl_heap.h:231:14: required from ‘void std::__adjust_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<HuffmanNode**, std::vector<HuffmanNode*> >; _Distance = long int; _Tp = HuffmanNode*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<std::greater<HuffmanNode> >]’
/usr/include/c++/11/bits/stl_heap.h:263:25: required from ‘void std::__pop_heap(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare&) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<HuffmanNode**, std::vector<HuffmanNode*> >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<std::greater<HuffmanNode> >]’
/usr/include/c++/11/bits/stl_heap.h:332:19: required from ‘void std::pop_heap(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<HuffmanNode**, std::vector<HuffmanNode*> >; _Compare = std::greater<HuffmanNode>]’
/usr/include/c++/11/bits/stl_queue.h:678:15: required from ‘void std::priority_queue<_Tp, _Sequence, _Compare>::pop() [with _Tp = HuffmanNode*; _Sequence = std::vector<HuffmanNode*>; _Compare = std::greater<HuffmanNode>]’
Main.cc:50:55: required from here
/usr/include/c++/11/bits/predefined_ops.h:158:30: error: no match for call to ‘(std::greater<HuffmanNode>) (HuffmanNode*&, HuffmanNode*&)’
158 | { return bool(_M_comp(*__it1, *__it2)); }
| ~~~~~~~^~~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/string:48,
from /usr/include/c++/11/bits/locale_classes.h:40,
from /usr/include/c++/11/bits/ios_base.h:41,
from /usr/include/c++/11/ios:42,
from /usr/include/c++/11/ostream:38,
from /usr/include/c++/11/iostream:39,
from Main.cc:1:
/usr/include/c++/11/bits/stl_function.h:389:7: note: candidate: ‘constexpr bool std::greater<_Tp>::operator()(const _Tp&, const _Tp&) const [with _Tp = HuffmanNode]’
389 | operator()(const _Tp& __x, const _Tp& __y) const
| ^~~~~~~~
/usr/include/c++/11/bits/stl_function.h:389:29: note: no known conversion for argument 1 from ‘HuffmanNode*’ to ‘const HuffmanNode&’
389 | operator()(const _Tp& __x, const _Tp& __y) const
| ~~~~~~~~~~~^~~
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