In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h: In instantiation of 'std::pair<typename BinarySearchTree<std::pair<_T1, _T2>, Map<Key_type, Value_type, Key_compare>::PairComp>::Iterator, bool> Map<Key_type, Value_type, Key_compare>::insert(const Pair_type&) [with Key_type = std::__cxx11::basic_string<char>; Value_type = int; Key_compare = std::less<std::__cxx11::basic_string<char> >; typename BinarySearchTree<std::pair<_T1, _T2>, Map<Key_type, Value_type, Key_compare>::PairComp>::Iterator = BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator; Map<Key_type, Value_type, Key_compare>::Pair_type = std::pair<std::__cxx11::basic_string<char>, int>]':
/in/Compile/Map_compile_check.cpp:80:26:   required from here
/in/Map.h:124:43: error: 'class BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' has no member named 'first'
     return std::make_pair(Iterator(result.first), inserted);
                                    ~~~~~~~^~~~~
/in/Map.h: In instantiation of 'std::pair<typename BinarySearchTree<std::pair<_T1, _T2>, Map<Key_type, Value_type, Key_compare>::PairComp>::Iterator, bool> Map<Key_type, Value_type, Key_compare>::insert(const Pair_type&) [with Key_type = Duck; Value_type = std::__cxx11::basic_string<char>; Key_compare = DuckWealthLess; typename BinarySearchTree<std::pair<_T1, _T2>, Map<Key_type, Value_type, Key_compare>::PairComp>::Iterator = BinarySearchTree<std::pair<Duck, std::__cxx11::basic_string<char> >, Map<Duck, std::__cxx11::basic_string<char>, DuckWealthLess>::PairComp>::Iterator; Map<Key_type, Value_type, Key_compare>::Pair_type = std::pair<Duck, std::__cxx11::basic_string<char> >]':
/in/Compile/Map_compile_check.cpp:82:47:   required from here
/in/Map.h:124:43: error: 'class BinarySearchTree<std::pair<Duck, std::__cxx11::basic_string<char> >, Map<Duck, std::__cxx11::basic_string<char>, DuckWealthLess>::PairComp>::Iterator' has no member named 'first'
/in/Map.h: In instantiation of 'Value_type& Map<Key_type, Value_type, Key_compare>::operator[](const Key_type&) [with Key_type = std::__cxx11::basic_string<char>; Value_type = int; Key_compare = std::less<std::__cxx11::basic_string<char> >]':
/in/Compile/Map_compile_check.cpp:85:21:   required from here
/in/Map.h:106:14: error: no match for 'operator==' (operand types are 'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' and 'std::nullptr_t')
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /in/Map.h:19:0,
                 from /in/Compile/Map_compile_check.cpp:5:
/in/BinarySearchTree.h:210:10: note: candidate: bool BinarySearchTree<T, Compare>::Iterator::operator==(const BinarySearchTree<T, Compare>::Iterator&) const [with T = std::pair<std::__cxx11::basic_string<char>, int>; Compare = Map<std::__cxx11::basic_string<char>, int>::PairComp]
     bool operator==(const Iterator &rhs) const {
          ^~~~~~~~
/in/BinarySearchTree.h:210:10: note:   no known conversion for argument 1 from 'std::nullptr_t' to 'const BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator&'
In file included from /usr/include/c++/7/bits/stl_algobase.h:64:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/string:40,
                 from /in/Compile/Map_compile_check.cpp:3:
/usr/include/c++/7/bits/stl_pair.h:448:5: note: candidate: template<class _T1, class _T2> constexpr bool std::operator==(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&)
     operator==(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
     ^~~~~~~~
/usr/include/c++/7/bits/stl_pair.h:448:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' is not derived from 'const std::pair<_T1, _T2>'
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /usr/include/c++/7/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/string:40,
                 from /in/Compile/Map_compile_check.cpp:3:
/usr/include/c++/7/bits/stl_iterator.h:302:5: note: candidate: template<class _Iterator> constexpr bool std::operator==(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_Iterator>&)
     operator==(const reverse_iterator<_Iterator>& __x,
     ^~~~~~~~
/usr/include/c++/7/bits/stl_iterator.h:302:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' is not derived from 'const std::reverse_iterator<_Iterator>'
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /usr/include/c++/7/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/string:40,
                 from /in/Compile/Map_compile_check.cpp:3:
/usr/include/c++/7/bits/stl_iterator.h:340:5: note: candidate: template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&)
     operator==(const reverse_iterator<_IteratorL>& __x,
     ^~~~~~~~
/usr/include/c++/7/bits/stl_iterator.h:340:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' is not derived from 'const std::reverse_iterator<_Iterator>'
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /usr/include/c++/7/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/string:40,
                 from /in/Compile/Map_compile_check.cpp:3:
/usr/include/c++/7/bits/stl_iterator.h:1121:5: note: candidate: template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorR>&)
     operator==(const move_iterator<_IteratorL>& __x,
     ^~~~~~~~
/usr/include/c++/7/bits/stl_iterator.h:1121:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' is not derived from 'const std::move_iterator<_IteratorL>'
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /usr/include/c++/7/bits/stl_algobase.h:67:0,
                 from /usr/include/c++/7/bits/char_traits.h:39,
                 from /usr/include/c++/7/string:40,
                 from /in/Compile/Map_compile_check.cpp:3:
/usr/include/c++/7/bits/stl_iterator.h:1127:5: note: candidate: template<class _Iterator> constexpr bool std::operator==(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorL>&)
     operator==(const move_iterator<_Iterator>& __x,
     ^~~~~~~~
/usr/include/c++/7/bits/stl_iterator.h:1127:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' is not derived from 'const std::move_iterator<_IteratorL>'
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /usr/include/c++/7/bits/char_traits.h:40:0,
                 from /usr/include/c++/7/string:40,
                 from /in/Compile/Map_compile_check.cpp:3:
/usr/include/c++/7/bits/postypes.h:216:5: note: candidate: template<class _StateT> bool std::operator==(const std::fpos<_StateT>&, const std::fpos<_StateT>&)
     operator==(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
     ^~~~~~~~
/usr/include/c++/7/bits/postypes.h:216:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' is not derived from 'const std::fpos<_StateT>'
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /usr/include/c++/7/string:41:0,
                 from /in/Compile/Map_compile_check.cpp:3:
/usr/include/c++/7/bits/allocator.h:146:5: note: candidate: template<class _T1, class _T2> bool std::operator==(const std::allocator<_CharT>&, const std::allocator<_T2>&)
     operator==(const allocator<_T1>&, const allocator<_T2>&)
     ^~~~~~~~
/usr/include/c++/7/bits/allocator.h:146:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' is not derived from 'const std::allocator<_CharT>'
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /usr/include/c++/7/string:41:0,
                 from /in/Compile/Map_compile_check.cpp:3:
/usr/include/c++/7/bits/allocator.h:152:5: note: candidate: template<class _Tp> bool std::operator==(const std::allocator<_CharT>&, const std::allocator<_CharT>&)
     operator==(const allocator<_Tp>&, const allocator<_Tp>&)
     ^~~~~~~~
/usr/include/c++/7/bits/allocator.h:152:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' is not derived from 'const std::allocator<_CharT>'
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /usr/include/c++/7/bits/basic_string.h:48:0,
                 from /usr/include/c++/7/string:52,
                 from /in/Compile/Map_compile_check.cpp:3:
/usr/include/c++/7/string_view:450:5: note: candidate: template<class _CharT, class _Traits> constexpr bool std::operator==(std::basic_string_view<_CharT, _Traits>, std::basic_string_view<_CharT, _Traits>)
     operator==(basic_string_view<_CharT, _Traits> __x,
     ^~~~~~~~
/usr/include/c++/7/string_view:450:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' is not derived from 'std::basic_string_view<_CharT, _Traits>'
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /usr/include/c++/7/bits/basic_string.h:48:0,
                 from /usr/include/c++/7/string:52,
                 from /in/Compile/Map_compile_check.cpp:3:
/usr/include/c++/7/string_view:456:5: note: candidate: template<class _CharT, class _Traits> constexpr bool std::operator==(std::basic_string_view<_CharT, _Traits>, std::__detail::__idt<std::basic_string_view<_CharT, _Traits> >)
     operator==(basic_string_view<_CharT, _Traits> __x,
     ^~~~~~~~
/usr/include/c++/7/string_view:456:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' is not derived from 'std::basic_string_view<_CharT, _Traits>'
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /usr/include/c++/7/bits/basic_string.h:48:0,
                 from /usr/include/c++/7/string:52,
                 from /in/Compile/Map_compile_check.cpp:3:
/usr/include/c++/7/string_view:462:5: note: candidate: template<class _CharT, class _Traits> constexpr bool std::operator==(std::__detail::__idt<std::basic_string_view<_CharT, _Traits> >, std::basic_string_view<_CharT, _Traits>)
     operator==(__detail::__idt<basic_string_view<_CharT, _Traits>> __x,
     ^~~~~~~~
/usr/include/c++/7/string_view:462:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'std::nullptr_t'
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /usr/include/c++/7/string:52:0,
                 from /in/Compile/Map_compile_check.cpp:3:
/usr/include/c++/7/bits/basic_string.h:6009:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:6009:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /usr/include/c++/7/string:52:0,
                 from /in/Compile/Map_compile_check.cpp:3:
/usr/include/c++/7/bits/basic_string.h:6017:5: note: candidate: template<class _CharT> typename __gnu_cxx::__enable_if<std::__is_char<_Tp>::__value, bool>::__type std::operator==(const std::__cxx11::basic_string<_CharT>&, const std::__cxx11::basic_string<_CharT>&)
     operator==(const basic_string<_CharT>& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:6017:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' is not derived from 'const std::__cxx11::basic_string<_CharT>'
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /usr/include/c++/7/string:52:0,
                 from /in/Compile/Map_compile_check.cpp:3:
/usr/include/c++/7/bits/basic_string.h:6031:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const _CharT*, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator==(const _CharT* __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:6031:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   mismatched types 'const _CharT*' and 'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator'
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /usr/include/c++/7/string:52:0,
                 from /in/Compile/Map_compile_check.cpp:3:
/usr/include/c++/7/bits/basic_string.h:6043:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&, const _CharT*)
     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
     ^~~~~~~~
/usr/include/c++/7/bits/basic_string.h:6043:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /usr/include/c++/7/bits/ios_base.h:46:0,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/Compile/Map_compile_check.cpp:4:
/usr/include/c++/7/system_error:292:3: note: candidate: bool std::operator==(const std::error_code&, const std::error_code&)
   operator==(const error_code& __lhs, const error_code& __rhs) noexcept
   ^~~~~~~~
/usr/include/c++/7/system_error:292:3: note:   no known conversion for argument 1 from 'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' to 'const std::error_code&'
/usr/include/c++/7/system_error:297:3: note: candidate: bool std::operator==(const std::error_code&, const std::error_condition&)
   operator==(const error_code& __lhs, const error_condition& __rhs) noexcept
   ^~~~~~~~
/usr/include/c++/7/system_error:297:3: note:   no known conversion for argument 1 from 'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' to 'const std::error_code&'
/usr/include/c++/7/system_error:304:3: note: candidate: bool std::operator==(const std::error_condition&, const std::error_code&)
   operator==(const error_condition& __lhs, const error_code& __rhs) noexcept
   ^~~~~~~~
/usr/include/c++/7/system_error:304:3: note:   no known conversion for argument 1 from 'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' to 'const std::error_condition&'
/usr/include/c++/7/system_error:311:3: note: candidate: bool std::operator==(const std::error_condition&, const std::error_condition&)
   operator==(const error_condition& __lhs,
   ^~~~~~~~
/usr/include/c++/7/system_error:311:3: note:   no known conversion for argument 1 from 'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' to 'const std::error_condition&'
In file included from /usr/include/c++/7/bits/locale_facets.h:48:0,
                 from /usr/include/c++/7/bits/basic_ios.h:37,
                 from /usr/include/c++/7/ios:44,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from /in/Compile/Map_compile_check.cpp:4:
/usr/include/c++/7/bits/streambuf_iterator.h:204:5: note: candidate: template<class _CharT, class _Traits> bool std::operator==(const std::istreambuf_iterator<_CharT, _Traits>&, const std::istreambuf_iterator<_CharT, _Traits>&)
     operator==(const istreambuf_iterator<_CharT, _Traits>& __a,
     ^~~~~~~~
/usr/include/c++/7/bits/streambuf_iterator.h:204:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   'BinarySearchTree<std::pair<std::__cxx11::basic_string<char>, int>, Map<std::__cxx11::basic_string<char>, int>::PairComp>::Iterator' is not derived from 'const std::istreambuf_iterator<_CharT, _Traits>'
     if (node == nullptr) {
         ~~~~~^~~~~~~~~~
In file included from /usr/include/c++/7/tuple:39:0,
                 from /usr/include/c++/7/functional:54,
                 from /in/BinarySearchTree.h:21,
                 from /in/Map.h:19,
                 from /in/Compile/Map_compile_check.cpp:5:
/usr/include/c++/7/array:252:5: note: candidate: template<class _Tp, long unsigned int _Nm> bool std::operator==(const std::array<_Tp, _Nm>&, const std::array<_Tp, _Nm>&)
     operator==(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
     ^~~~~~~~
/usr/include/c++/7/array:252:5: note:   template argument deduction/substitution failed:
In file included from /in/Compile/Map_compile_check.cpp:5:0:
/in/Map.h:106:14: note:   'BinarySearchTr