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[libc++][test] Guard non-guaranteed implicit-lifetime-ness cases with _LIBCPP_VERSION #160627

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merged 2 commits into from
Sep 26, 2025
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[libc++][test] Guard non-guaranteed implicit-lifetime-ness cases with _LIBCPP_VERSION #160627

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[libc++][test] Guard non-guaranteed implicit-lifetime-ness cases with…
frederick-vs-ja Sep 25, 2025
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frederick-vs-ja Sep 25, 2025
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11 changes: 11 additions & 0 deletions libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_implicit_lifetime.pass.cpp
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Expand Up @@ -17,9 +17,12 @@

#include <cassert>
#include <cstddef>
#include <expected>
#include <optional>
#include <tuple>
#include <type_traits>
#include <utility>
#include <variant>

#include "test_macros.h"
#include "type_algorithms.h"
Expand Down Expand Up @@ -216,8 +219,16 @@ constexpr bool test() {

// C++ standard library types

// These types are guaranteed to be implicit-lifetime.
test_is_implicit_lifetime<std::expected<int, float>>();
test_is_implicit_lifetime<std::optional<float>>();
test_is_implicit_lifetime<std::variant<float, int>>();

#ifdef _LIBCPP_VERSION
// These types should be implicit-lifetime, but they are not guaranteed to be so.
test_is_implicit_lifetime<std::pair<int, float>>();
test_is_implicit_lifetime<std::tuple<int, float>>();
#endif

// Standard C23 types

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