[libc++][NFC] Cleanup is_implicit_life_time test

[H-G-Hristov]

Removed unsupported compilers and simplified the test a bit.

[llvmbot]

@llvm/pr-subscribers-libcxx

Author: Hristo Hristov (H-G-Hristov)

Changes

Removed unsupported compilers and simplified the test a bit.

---

Full diff: https://github.com/llvm/llvm-project/pull/164154.diff

1 Files Affected:

• (modified) libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_implicit_lifetime.pass.cpp (+6-13)

diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_implicit_lifetime.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_implicit_lifetime.pass.cpp
index 881a5d2c6f751..bdf502d140623 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_implicit_lifetime.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_implicit_lifetime.pass.cpp
@@ -6,10 +6,10 @@
 //
 //===----------------------------------------------------------------------===//
 
-// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
+// REQUIRES: std-at-least-c++23
 
 // These compilers don't support __builtin_is_implicit_lifetime yet.
-// UNSUPPORTED: clang-19, gcc-14, gcc-15, apple-clang-16, apple-clang-17
+// UNSUPPORTED: clang-19, gcc-15, apple-clang-17
 
 // <type_traits>
 
@@ -139,13 +139,6 @@ constexpr void test_is_implicit_lifetime() {
   test_is_implicit_lifetime<T[94], true>();
 }
 
-struct ArithmeticTypesTest {
-  template <class T>
-  constexpr void operator()() {
-    test_is_implicit_lifetime<T>();
-  }
-};
-
 constexpr bool test() {
   // Standard fundamental C++ types
 
@@ -155,7 +148,7 @@ constexpr bool test() {
   test_is_implicit_lifetime<const void, false>();
   test_is_implicit_lifetime<volatile void, false>();
 
-  types::for_each(types::arithmetic_types(), ArithmeticTypesTest{});
+  types::for_each(types::arithmetic_types(), []<typename T> { test_is_implicit_lifetime<T>(); });
 
   test_is_implicit_lifetime<Enum>();
   test_is_implicit_lifetime<SignedEnum>();
@@ -166,7 +159,7 @@ constexpr bool test() {
   test_is_implicit_lifetime<UnsignedEnumClass>();
 
   test_is_implicit_lifetime<void(), false>();
-  test_is_implicit_lifetime<void()&, false>();
+  test_is_implicit_lifetime<void() &, false>();
   test_is_implicit_lifetime<void() const, false>();
   test_is_implicit_lifetime<void (&)(), false>();
   test_is_implicit_lifetime<void (*)(), true>();
@@ -177,8 +170,8 @@ constexpr bool test() {
   test_is_implicit_lifetime<int EmptyStruct::*, true>(); // Pointer-to-member
   test_is_implicit_lifetime<int (EmptyStruct::*)(), true>();
   test_is_implicit_lifetime<int (EmptyStruct::*)() const, true>();
-  test_is_implicit_lifetime<int (EmptyStruct::*)()&, true>();
-  test_is_implicit_lifetime<int (EmptyStruct::*)()&&, true>();
+  test_is_implicit_lifetime<int (EmptyStruct::*)() &, true>();
+  test_is_implicit_lifetime<int (EmptyStruct::*)() &&, true>();
 
   test_is_implicit_lifetime<IncompleteStruct[], true>();
   test_is_implicit_lifetime<IncompleteStruct[82], true>();

[H-G-Hristov]

We are still skipping testing on Apple Clang 17, see #131302 but Xcode 26 (Apple Clang 17) claims to support is_implicit_lifetime in libc++: https://developer.apple.com/documentation/xcode-release-notes/xcode-26-release-notes#C++-Standard-Library Unfortunately I do not have a Mac to investigate. Supposedly we use Xcode 26 in the CI now: #160097