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

[Louis Dionne via libcxx-commits]

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@@ -0,0 +1,81 @@
+//===----------------------------------------------------------------------===//
+//
+// 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>
+
+// pair<iterator,iterator>             equal_range(const key_type& k);
+// pair<const_iterator,const_iterator> equal_range(const key_type& k) const;
+
+#include <cassert>
+#include <deque>
+#include <flat_set>
+#include <functional>
+#include <utility>
+
+#include "MinSequenceContainer.h"
+#include "test_macros.h"
+#include "min_allocator.h"
+
+template <class KeyContainer>
+void test_one() {
+  using Key = typename KeyContainer::value_type;
+  {
+    using M  = std::flat_set<Key, std::less<>, KeyContainer>;
+    using R  = std::pair<typename M::iterator, typename M::iterator>;
+    using CR = std::pair<typename M::const_iterator, typename M::const_iterator>;
+    M m      = {1, 2, 4, 5, 8};
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ldionne wrote:

Can you make a pass through all the observing operations that can be called on an empty `flat_set` and make sure we have coverage for that?

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