[libcxx-commits] [libcxx] [libc++] Simplify vector<bool>::flip() and add new tests (PR #119607)

[Peng Liu via libcxx-commits]

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@@ -0,0 +1,62 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// <vector>
+
+// void flip();
+
+#include <cassert>
+#include <memory>
+#include <vector>
+
+#include "min_allocator.h"
+#include "test_allocator.h"
+#include "test_macros.h"
+
+template <typename Allocator = std::allocator<bool> >
+TEST_CONSTEXPR_CXX20 void test_small_vector_flip(Allocator a) {
+  bool b[] = {true, false, true};
+  std::vector<bool, Allocator> v(b, b + 3, a);
+  v.flip();
+  assert(!v[0] && v[1] && !v[2]);
+}
+
+template <typename Allocator = std::allocator<bool> >
+TEST_CONSTEXPR_CXX20 void test_large_vector_flip(Allocator a) {
+  std::vector<bool, Allocator > v(1000, false, a);
+  for (std::size_t i = 0; i < v.size(); ++i)
+    v[i] = i & 1;
+  std::vector<bool, Allocator > original = v;
+  v.flip();
+  for (size_t i = 0; i < v.size(); ++i)
+    assert(v[i] == !original[i]);
+  v.flip();
+  assert(v == original);
+}
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winner245 wrote:

They are now integrated into a single function. 

https://github.com/llvm/llvm-project/pull/119607