[libcxx-commits] [libcxx] [libc++] Always initialize __tree::{, const_}iterator (PR #147167)

[Louis Dionne via libcxx-commits]

================
@@ -0,0 +1,26 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03
+
+// Check that map::iterator is initialized when default constructed
+
+#include <cassert>
+#include <map>
+
+template <class Iter>
+void test() {
+  Iter iter;
----------------
ldionne wrote:

While we're at it, let's test the following combinations:

```
{
  Iter iter1, iter2;
  assert(iter1 == iter2);
}
{
  Iter iter1;
  Iter iter2{};
  assert(iter1 == iter2);  
}
{
  Iter iter1{};
  Iter iter2;
  assert(iter1 == iter2);  
}
```


https://github.com/llvm/llvm-project/pull/147167