[libcxx-commits] [libcxx] [libc++] Add test to ensure that the mangling of types stays the same (PR #143556)

[Louis Dionne via libcxx-commits]

================
@@ -0,0 +1,72 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// We're using `std::from_chars` in this test
+// UNSUPPORTED: c++03, c++11, c++14
+
+// Make sure that the mangling of our public types stays the same
----------------
ldionne wrote:

```suggestion
// This test pins down the mangling of our public types to ensure that we don't
// change it unintentionally, which is an ABI break.
```

https://github.com/llvm/llvm-project/pull/143556