text: // -*- C++ -*-
  //===----------------------------------------------------------------------===//
  //
  //                     The LLVM Compiler Infrastructure
  //
  // This file is dual licensed under the MIT and the University of Illinois Open
  // Source Licenses. See LICENSE.TXT for details.
  //
  //===----------------------------------------------------------------------===//
  
  // <vector>
  
  // class vector
  
  // bool empty() const noexcept;
  
  // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
  // UNSUPPORTED: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8
  
  #include <vector>
  
  #include "test_macros.h"
  
  int main ()
  {
      std::vector<bool> c;
      c.empty();  // expected-error {{ignoring return value of function declared with 'nodiscard' attribute}}
  }
  