Remove uintptr_fallback

test/format-impl-test.cc

@@ -340,11 +340,13 @@ TEST(format_impl_test, count_digits) {
   test_count_digits<uint64_t>();
 }
 
-TEST(format_impl_test, write_fallback_uintptr) {
+TEST(format_impl_test, write_uintptr_fallback) {
   std::string s;
   fmt::detail::write_ptr<char>(
       std::back_inserter(s),
-      fmt::detail::uintptr_fallback(reinterpret_cast<void*>(0xface)), nullptr);
+      fmt::detail::to_uintptr<fmt::detail::uint128_fallback>(
+          reinterpret_cast<void*>(0xface)),
+      nullptr);
   EXPECT_EQ(s, "0xface");
 }