[libcxx-commits] [libcxx] [libc++][type_traits][modules] Added missing `std::is_virtual_base_of` to `type_traits.inc` (PR #107009)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-libcxx

Author: Hristo Hristov (H-G-Hristov)

<details>
<summary>Changes</summary>

`std::is_virtual_base_of` was implemented in https://github.com/llvm/llvm-project/pull/105847

---
Full diff: https://github.com/llvm/llvm-project/pull/107009.diff


1 Files Affected:

- (modified) libcxx/modules/std/type_traits.inc (+6) 


``````````diff
diff --git a/libcxx/modules/std/type_traits.inc b/libcxx/modules/std/type_traits.inc
index d368daf35ccb8c..485a5ddf63aed0 100644
--- a/libcxx/modules/std/type_traits.inc
+++ b/libcxx/modules/std/type_traits.inc
@@ -114,6 +114,9 @@ export namespace std {
 
   // [meta.rel], type relations
   using std::is_base_of;
+#if _LIBCPP_STD_VER >= 26 && __has_builtin(__builtin_is_virtual_base_of)
+  using std::is_virtual_base_of;
+#endif
   using std::is_convertible;
   // using std::is_layout_compatible;
   using std::is_nothrow_convertible;
@@ -287,6 +290,9 @@ export namespace std {
 
   // [meta.rel], type relations
   using std::is_base_of_v;
+#if _LIBCPP_STD_VER >= 26 && __has_builtin(__builtin_is_virtual_base_of)
+  using std::is_virtual_base_of_v;
+#endif
   using std::is_convertible_v;
   using std::is_invocable_r_v;
   using std::is_invocable_v;

``````````

</details>


https://github.com/llvm/llvm-project/pull/107009