foo.cc:1:1: error: 'String' does not name a type
1 | String to Num - https://www.youtube.com/watch?v=zBEOHGr7YAU
| ^~~~~~
In file included from /usr/include/c++/13/bits/stl_algobase.h:62,
from /usr/include/c++/13/algorithm:60,
from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:51,
from foo.cc:9:
/usr/include/c++/13/ext/type_traits.h:164:35: error: 'constexpr const bool __gnu_cxx::__is_null_pointer' redeclared as different kind of entity
164 | __is_null_pointer(std::nullptr_t)
| ^
/usr/include/c++/13/ext/type_traits.h:159:5: note: previous declaration 'template<class _Type> constexpr bool __gnu_cxx::__is_null_pointer(_Type)'
159 | __is_null_pointer(_Type)
| ^~~~~~~~~~~~~~~~~
/usr/include/c++/13/ext/type_traits.h:164:26: error: 'nullptr_t' is not a member of 'std'; did you mean 'nullptr_t'?
164 | __is_null_pointer(std::nullptr_t)
| ^~~~~~~~~
In file included from /usr/include/c++/13/cstddef:50,
from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:41:
/usr/lib/gcc/x86_64-linux-gnu/13/include/stddef.h:443:29: note: 'nullptr_t' declared here
443 | typedef decltype(nullptr) nullptr_t;
| ^~~~~~~~~
In file included from /usr/include/c++/13/bits/stl_pair.h:60,
from /usr/include/c++/13/bits/stl_algobase.h:64:
/usr/include/c++/13/type_traits:510:26: error: 'std::size_t' has not been declared
510 | template<typename _Tp, std::size_t _Size>
| ^~~
/usr/include/c++/13/type_traits:511:25: error: '_Size' was not declared in this scope
511 | struct is_array<_Tp[_Size]>
| ^~~~~
/usr/include/c++/13/type_traits:511:31: error: template argument 1 is invalid
511 | struct is_array<_Tp[_Size]>
| ^
/usr/include/c++/13/type_traits:617:33: error: 'nullptr_t' is not a member of 'std'; did you mean 'nullptr_t'?
617 | struct is_null_pointer<std::nullptr_t>
| ^~~~~~~~~
/usr/lib/gcc/x86_64-linux-gnu/13/include/stddef.h:443:29: note: 'nullptr_t' declared here
443 | typedef decltype(nullptr) nullptr_t;
| ^~~~~~~~~
/usr/include/c++/13/type_traits:617:42: error: template argument 1 is invalid
617 | struct is_null_pointer<std::nullptr_t>
| ^
/usr/include/c++/13/type_traits:621:48: error: template argument 1 is invalid
621 | struct is_null_pointer<const std::nullptr_t>
| ^
/usr/include/c++/13/type_traits:625:51: error: template argument 1 is invalid
625 | struct is_null_pointer<volatile std::nullptr_t>
| ^
/usr/include/c++/13/type_traits:629:57: error: template argument 1 is invalid
629 | struct is_null_pointer<const volatile std::nullptr_t>
| ^
/usr/include/c++/13/type_traits:1348:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
1348 | : public integral_constant<std::size_t, alignof(_Tp)>
| ^~~~~~
/usr/lib/gcc/x86_64-linux-gnu/13/include/stddef.h:214:23: note: 'size_t' declared here
214 | typedef __SIZE_TYPE__ size_t;
| ^~~~~~
/usr/include/c++/13/type_traits:1348:57: error: template argument 1 is invalid
1348 | : public integral_constant<std::size_t, alignof(_Tp)>
| ^
/usr/include/c++/13/type_traits:1348:57: note: invalid template non-type parameter
/usr/include/c++/13/type_traits:1357:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
1357 | : public integral_constant<std::size_t, 0> { };
| ^~~~~~
/usr/lib/gcc/x86_64-linux-gnu/13/include/stddef.h:214:23: note: 'size_t' declared here
214 | typedef __SIZE_TYPE__ size_t;
| ^~~~~~
/usr/include/c++/13/type_traits:1357:46: error: template argument 1 is invalid
1357 | : public integral_constant<std::size_t, 0> { };
| ^
/usr/include/c++/13/type_traits:1357:46: note: invalid template non-type parameter
/usr/include/c++/13/type_traits:1359:26: error: 'std::size_t' has not been declared
1359 | template<typename _Tp, std::size_t _Size>
| ^~~
/usr/include/c++/13/type_traits:1360:21: error: '_Size' was not declared in this scope
1360 | struct rank<_Tp[_Size]>
| ^~~~~
/usr/include/c++/13/type_traits:1360:27: error: template argument 1 is invalid
1360 | struct rank<_Tp[_Size]>
| ^
/usr/include/c++/13/type_traits:1361:37: error: 'size_t' is not a member of 'std'; did you mean 'size_t'?
1361 | : public integral_constant<std::size_t, 1 + rank<_Tp>::value> {