[libcxx-commits] [libcxx] [libc++][optional] LWG4497: `std::nullopt_t` should be comparable (PR #214975)

via libcxx-commits libcxx-commits at lists.llvm.org
Sat Aug 8 08:25:44 PDT 2026


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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- libcxx/test/std/utilities/optional/optional.nullopt/compare.three_way.pass.cpp libcxx/include/__optional/nullopt_t.h --diff_from_common_commit
``````````

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``````````diff
diff --git a/libcxx/test/std/utilities/optional/optional.nullopt/compare.three_way.pass.cpp b/libcxx/test/std/utilities/optional/optional.nullopt/compare.three_way.pass.cpp
index c0d17e809..499716b7c 100644
--- a/libcxx/test/std/utilities/optional/optional.nullopt/compare.three_way.pass.cpp
+++ b/libcxx/test/std/utilities/optional/optional.nullopt/compare.three_way.pass.cpp
@@ -24,22 +24,21 @@
 
 #include "test_macros.h"
 
-
 #if TEST_STD_VER >= 20
 static_assert(std::copyable<std::nullopt_t>);
 static_assert(std::three_way_comparable<std::nullopt_t, std::strong_ordering>);
 #endif
 
 constexpr bool test() {
-  assert(std::nullopt == std:nullopt);
-  assert(!(std:nullopt != std:nullopt));
-  assert(std:nullopt <= std:nullopt);
-  assert(std:nullopt >= std:nullopt);
-  assert(!(std:nullopt > std:nullopt));
-  assert(!(std:nullopt < std:nullopt));
+  assert(std::nullopt == std : nullopt);
+  assert(!(std : nullopt != std : nullopt));
+  assert(std : nullopt <= std : nullopt);
+  assert(std : nullopt >= std : nullopt);
+  assert(!(std : nullopt > std : nullopt));
+  assert(!(std : nullopt < std : nullopt));
 
 #if TEST_STD_VER >= 20
-  assert((std:nullopt <=> std:nullopt) == std::strong_ordering::equal);
+  assert((std : nullopt <=> std : nullopt) == std::strong_ordering::equal);
   // Test ranges::find with nullopt
   std::vector<std::optional<int>> v = {1, 2, nullopt, 4, 5};
   auto it                           = std::ranges::find(v, nullopt);

``````````

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https://github.com/llvm/llvm-project/pull/214975


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