[libcxx-commits] [libcxx] [libc++][test] Add default member initializers to `TestCaseMapSet` (PR #107145)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-libcxx

Author: Casey Carter (CaseyCarter)

<details>
<summary>Changes</summary>

These do-nothing initializers (`Buffer<T>` is fully initialized, so value-init and default-init are equivalent) silence Clang 18 `-Wmissing-field-initializers` warnings when the functions in the same header use designated initializers for `TestCaseMapSet`. (Clang 19+ doesn't emit this warning for designated initializers.)

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Full diff: https://github.com/llvm/llvm-project/pull/107145.diff


1 Files Affected:

- (modified) libcxx/test/std/containers/insert_range_maps_sets.h (+4-4) 


``````````diff
diff --git a/libcxx/test/std/containers/insert_range_maps_sets.h b/libcxx/test/std/containers/insert_range_maps_sets.h
index 82fea93b68fe37..78af8ac66aacc8 100644
--- a/libcxx/test/std/containers/insert_range_maps_sets.h
+++ b/libcxx/test/std/containers/insert_range_maps_sets.h
@@ -70,10 +70,10 @@ constexpr bool test_map_constraints_insert_range() {
 
 template <class T>
 struct TestCaseMapSet {
-  Buffer<T> initial;
-  Buffer<T> input;
-  Buffer<T> expected;
-  Buffer<T> expected_multi;
+  Buffer<T> initial{};
+  Buffer<T> input{};
+  Buffer<T> expected{};
+  Buffer<T> expected_multi{};
 };
 
 // Empty container.

``````````

</details>


https://github.com/llvm/llvm-project/pull/107145