[gcc r13-8139] libstdc++: Fix misleading typedef name in <format>

[Jonathan Wakely <redi@gcc.gnu.org>]

https://gcc.gnu.org/g:1f10823731394b19b4d2e466b35cdccd18efba37

commit r13-8139-g1f10823731394b19b4d2e466b35cdccd18efba37
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Thu Dec 7 12:40:18 2023 +0000

    libstdc++: Fix misleading typedef name in <format>
    
    This local typedef for uintptr_t was accidentally named uint64_t,
    probably from a careless code completion shortcut. We don't need the
    typedef at all since it's only used once. Just use __UINTPTR_TYPE__
    directly instead.
    
    libstdc++-v3/ChangeLog:
    
            * include/std/format (_Iter_sink<charT, contiguous_iterator>):
            Remove uint64_t local type.
    
    (cherry picked from commit cab0083dc72dfd22a1b2016b068f9313beb7f091)

Diff:
---
 libstdc++-v3/include/std/format | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/libstdc++-v3/include/std/format b/libstdc++-v3/include/std/format
index a48bb2e161d..88510ccf60e 100644
--- a/libstdc++-v3/include/std/format
+++ b/libstdc++-v3/include/std/format
@@ -2587,7 +2587,6 @@ namespace __format
     requires same_as<iter_value_t<_OutIter>, _CharT>
     class _Iter_sink<_CharT, _OutIter> : public _Sink<_CharT>
     {
-      using uint64_t = __UINTPTR_TYPE__;
       _OutIter _M_first;
       iter_difference_t<_OutIter> _M_max = -1;
     protected:
@@ -2646,7 +2645,7 @@ namespace __format
 	  return {__ptr, __bytes / sizeof(_CharT)};
 #endif
 	// Avoid forming a pointer to a different memory page.
-	uint64_t __off = reinterpret_cast<uint64_t>(__ptr) % 1024;
+	const auto __off = reinterpret_cast<__UINTPTR_TYPE__>(__ptr) % 1024;
 	__n = (1024 - __off) / sizeof(_CharT);
 	if (__n > 0) [[likely]]
 	return {__ptr, static_cast<size_t>(__n)};