Main.cc: In function 'int main()':
Main.cc:15:18: error: no match for 'operator<' (operand types are 'std::ostream' {aka 'std::basic_ostream<char>'} and 'const char [2]')
15 | else cout<"A";
| ~~~~^~~~
| | |
| | const char [2]
| std::ostream {aka std::basic_ostream<char>}
In file included from /usr/include/c++/12.2.1/string:47,
from /usr/include/c++/12.2.1/bits/locale_classes.h:40,
from /usr/include/c++/12.2.1/bits/ios_base.h:41,
from /usr/include/c++/12.2.1/ios:42,
from /usr/include/c++/12.2.1/ostream:38,
from /usr/include/c++/12.2.1/iostream:39,
from Main.cc:1:
/usr/include/c++/12.2.1/bits/stl_iterator.h:451:5: note: candidate: 'template<class _Iterator> bool std::operator<(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
451 | operator<(const reverse_iterator<_Iterator>& __x,
| ^~~~~~~~
/usr/include/c++/12.2.1/bits/stl_iterator.h:451:5: note: template argument deduction/substitution failed:
Main.cc:15:19: note: 'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::reverse_iterator<_Iterator>'
15 | else cout<"A";
| ^~~
/usr/include/c++/12.2.1/bits/stl_iterator.h:496:5: note: candidate: 'template<class _IteratorL, class _IteratorR> bool std::operator<(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
496 | operator<(const reverse_iterator<_IteratorL>& __x,
| ^~~~~~~~
/usr/include/c++/12.2.1/bits/stl_iterator.h:496:5: note: template argument deduction/substitution failed:
Main.cc:15:19: note: 'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::reverse_iterator<_Iterator>'
15 | else cout<"A";
| ^~~
/usr/include/c++/12.2.1/bits/stl_iterator.h:1683:5: note: candidate: 'template<class _IteratorL, class _IteratorR> bool std::operator<(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
1683 | operator<(const move_iterator<_IteratorL>& __x,
| ^~~~~~~~
/usr/include/c++/12.2.1/bits/stl_iterator.h:1683:5: note: template argument deduction/substitution failed:
Main.cc:15:19: note: 'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::move_iterator<_IteratorL>'
15 | else cout<"A";
| ^~~
/usr/include/c++/12.2.1/bits/stl_iterator.h:1748:5: note: candidate: 'template<class _Iterator> bool std::operator<(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
1748 | operator<(const move_iterator<_Iterator>& __x,
| ^~~~~~~~
/usr/include/c++/12.2.1/bits/stl_iterator.h:1748:5: note: template argument deduction/substitution failed:
Main.cc:15:19: note: 'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::move_iterator<_IteratorL>'
15 | else cout<"A";
| ^~~
In file included from /usr/include/c++/12.2.1/bits/stl_algobase.h:64,
from /usr/include/c++/12.2.1/string:50:
/usr/include/c++/12.2.1/bits/stl_pair.h:663:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator<(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
663 | operator<(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
| ^~~~~~~~
/usr/include/c++/12.2.1/bits/stl_pair.h:663:5: note: template argument deduction/substitution failed:
Main.cc:15:19: note: 'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::pair<_T1, _T2>'
15 | else cout<"A";
| ^~~
In file included from /usr/include/c++/12.2.1/string:53:
/usr/include/c++/12.2.1/bits/basic_string.h:3691:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator<(const __cxx11::basic_string<_CharT, _Traits, _Alloc>&, const __cxx11::basic_string<_CharT, _Traits, _Alloc>&)'
3691 | operator<(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
| ^~~~~~~~
/usr/include/c++/12.2.1/bits/basic_string.h:3691:5: note: template argument deduction/substitution failed:
Main.cc:15:19: note: 'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
15 | else cout<"A";
| ^~~
/usr/include/c++/12.2.1/bits/basic_string.h:3704:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator<(const __cxx11::basic_string<_CharT, _Traits, _Alloc>&, const _CharT*)'
3704 | operator<(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
| ^~~~~~~~
/usr/include/c++/12.2.1/bits/basic_string.h:3704:5: note: template argument deduction/substitution failed:
Main.cc:15:19: note: 'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>'
15 | else cout<"A";
| ^~~
/usr/include/c++/12.2.1/bits/basic_string.h:3716:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator<(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Alloc>&)'
3716 | operator<(const _CharT* __lhs,
| ^~~~~~~~
/usr/include/c++/12.2.1/bits/basic_string.h:3716:5: note: template argument deduction/substitution failed:
Main.cc:15:19: note: mismatched types 'const _CharT*' and 'std::basic_ostream<char>'
15 | else cout<"A";
| ^~~
In file included from /usr/include/c++/12.2.1/bits/ios_base.h:46:
/usr/include/c++/12.2.1/system_error:269:3: note: candidate: 'bool std::operator<(const error_code&, const error_code&)'
269 | operator<(const error_code& __lhs, const error_code& __rhs) noexcept
| ^~~~~~~~
/usr/include/c++/12.2.1/system_error:269:31: note: no known conversion for argument 1 from 'std::ostream' {aka 'std::basic_ostream<char>'} to 'const std::error_code&'
269 | operator<(const error_code& __lhs, const error_code& __rhs) noexcept
| ~~~~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/12.2.1/system_error:398:3: note: candidate: 'bool std::operator<(const error_condition&, const error_condition&)'
398 | operator<(const error_condition& __lhs,
| ^~~~~~~~
/usr/include/c++/12.2.1/system_error:398:36: note: no known conversion for argument 1 from 'std::ostream' {aka 'std::basic_ostream<char>'} to 'const std::error_condition&'
398 | operator<(const error_condition& __lhs,
| ~~~~~~~~~~~~~~~~~~~~~~~^~~~~