[libcxx-commits] [libcxx] [libc++] implement std::flat_set (PR #125241)

[Louis Dionne via libcxx-commits]

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@@ -0,0 +1,56 @@
+//===----------------------------------------------------------------------===//
+//
+// 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, c++11, c++14, c++17, c++20
+
+// <flat_set>
+
+// flat_set& operator=(initializer_list<value_type> il);
+
+#include <algorithm>
+#include <cassert>
+#include <deque>
+#include <flat_set>
+#include <functional>
+#include <vector>
+
+#include "MinSequenceContainer.h"
+#include "test_macros.h"
+#include "min_allocator.h"
+
+template <class KeyContainer>
+void test() {
+  using Key = typename KeyContainer::value_type;
+  using M   = std::flat_set<Key, std::less<Key>, KeyContainer>;
+  {
+    M m = {8, 10};
+    assert(m.size() == 2);
+    m              = {3, 1, 2, 2, 3, 4, 3, 5, 6, 5};
+    int expected[] = {1, 2, 3, 4, 5, 6};
+    assert(std::ranges::equal(m, expected));
+    LIBCPP_ASSERT(std::ranges::equal(m, expected));
----------------
ldionne wrote:

```suggestion
```

https://github.com/llvm/llvm-project/pull/125241