test/libcxx/strings/basic.string/string.access/db_cback.pass.cpp

//===----------------------------------------------------------------------===//
//
// 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>

// Call back() on empty const container.

// UNSUPPORTED: libcxx-no-debug-mode

// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DEBUG=1
#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))

#include <string>
#include <cassert>
#include <iterator>
#include <exception>
#include <cstdlib>

#include "test_macros.h"

int main(int, char**) {
  typedef std::string S;
  const S s;
  assert(s.back() == 0);
  assert(false);

  return 0;
}