Initial commit

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

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+//===----------------------------------------------------------------------===//
+//
+// 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_view>
+
+// class string_view
+
+// bool empty() const noexcept;
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+#include <string_view>
+
+#include "test_macros.h"
+
+int main(int, char**)
+{
+    std::string_view c;
+    c.empty();  // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
+
+    return 0;
+}