Initial commit

module/jni/libcxx/test/std/strings/basic.string/string.capacity/empty.verify.cpp

@@ -0,0 +1,36 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// class deque
+
+// bool empty() const noexcept; // constexpr since C++20
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+#include <string>
+
+#include "test_macros.h"
+
+TEST_CONSTEXPR_CXX20 bool test() {
+  std::string c;
+  c.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
+
+  return true;
+}
+
+int main(int, char**)
+{
+  test();
+#if TEST_STD_VER > 17
+  static_assert(test());
+#endif
+
+  return 0;
+}