spanstream does not support no-localization

libcxx/include/spanstream

@@ -54,31 +54,34 @@
 
 // clang-format on
 
-#include <__concepts/convertible_to.h>
 #include <__config>
-#include <__fwd/spanstream.h>
-#include <__memory/addressof.h>
-#include <__ranges/concepts.h>
-#include <__utility/cmp.h>
-#include <__utility/forward.h>
-#include <__utility/move.h>
-#include <__utility/swap.h>
-#include <ios>
-#include <iostream>
-#include <span>
-#include <streambuf>
-#include <version>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#  pragma GCC system_header
-#endif
+
+#if !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+
+#  include <__concepts/convertible_to.h>
+#  include <__fwd/spanstream.h>
+#  include <__memory/addressof.h>
+#  include <__ranges/concepts.h>
+#  include <__utility/cmp.h>
+#  include <__utility/forward.h>
+#  include <__utility/move.h>
+#  include <__utility/swap.h>
+#  include <ios>
+#  include <iostream>
+#  include <span>
+#  include <streambuf>
+#  include <version>
+
+#  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#    pragma GCC system_header
+#  endif
 
 _LIBCPP_PUSH_MACROS
-#include <__undef_macros>
+#  include <__undef_macros>
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-#if _LIBCPP_STD_VER >= 23
+#  if _LIBCPP_STD_VER >= 23
 
 // Class template basic_spanbuf [spanbuf]
 
@@ -240,9 +243,9 @@ _LIBCPP_HIDE_FROM_ABI void swap(basic_spanbuf<_CharT, _Traits>& __x, basic_spanb
 }
 
 using std::spanbuf;
-#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#    ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 using std::wspanbuf;
-#  endif
+#    endif
 
 // Class template basic_ispanstream [ispanstream]
 
@@ -318,9 +321,9 @@ _LIBCPP_HIDE_FROM_ABI void swap(basic_ispanstream<_CharT, _Traits>& __x, basic_i
 }
 
 using std::ispanstream;
-#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#    ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 using std::wispanstream;
-#  endif
+#    endif
 
 // Class template basic_ospanstream [ospanstream]
 
@@ -381,9 +384,9 @@ _LIBCPP_HIDE_FROM_ABI void swap(basic_ospanstream<_CharT, _Traits>& __x, basic_o
 }
 
 using std::ospanstream;
-#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#    ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 using std::wospanstream;
-#  endif
+#    endif
 
 template <class _CharT, class _Traits>
 class _LIBCPP_TEMPLATE_VIS basic_spanstream : public basic_iostream<_CharT, _Traits> {
@@ -442,16 +445,18 @@ _LIBCPP_HIDE_FROM_ABI void swap(basic_spanstream<_CharT, _Traits>& __x, basic_sp
 }
 
 using std::spanstream;
-#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#    ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 using std::wspanstream;
-#  endif
+#    endif
 
-#endif // _LIBCPP_STD_VER >= 23
+#  endif // _LIBCPP_STD_VER >= 23
 
 _LIBCPP_END_NAMESPACE_STD
 
 _LIBCPP_POP_MACROS
 
+#endif // !_LIBCPP_HAS_NO_LOCALIZATION
+
 #if _LIBCPP_STD_VER <= 20 && !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES)
 #  include <type_traits>
 #endif