third_party/libc++/src/test/libcxx/strings/string.view/string.view.iterators/debug.iterator-indexing.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
//
//===----------------------------------------------------------------------===//

// Make sure that std::string_view's iterators check for OOB accesses when the debug mode is enabled.

// REQUIRES: has-unix-headers, libcpp-has-abi-bounded-iterators
// UNSUPPORTED: libcpp-hardening-mode=none

#include <string_view>

#include "check_assertion.h"

int main(int, char**) {
  // string_view::iterator
  {
    std::string_view const str("hello world");
    {
      auto it = str.end();
      TEST_LIBCPP_ASSERT_FAILURE(*it, "__bounded_iter::operator*: Attempt to dereference an out-of-range iterator");
    }
    {
      auto it = str.end();
      TEST_LIBCPP_ASSERT_FAILURE(
          it.operator->(), "__bounded_iter::operator->: Attempt to dereference an out-of-range iterator");
    }
    {
      auto it = str.begin();
      TEST_LIBCPP_ASSERT_FAILURE(it[99], "__bounded_iter::operator[]: Attempt to index an iterator out-of-range");
    }
  }

  // string_view::const_iterator
  {
    std::string_view const str("hello world");
    {
      auto it = str.cend();
      TEST_LIBCPP_ASSERT_FAILURE(*it, "__bounded_iter::operator*: Attempt to dereference an out-of-range iterator");
    }
    {
      auto it = str.cend();
      TEST_LIBCPP_ASSERT_FAILURE(
          it.operator->(), "__bounded_iter::operator->: Attempt to dereference an out-of-range iterator");
    }
    {
      auto it = str.cbegin();
      TEST_LIBCPP_ASSERT_FAILURE(it[99], "__bounded_iter::operator[]: Attempt to index an iterator out-of-range");
    }
  }

  // string_view::reverse_iterator
  {
    std::string_view const str("hello world");
    {
      auto it = str.rend();
      TEST_LIBCPP_ASSERT_FAILURE(*it, "__bounded_iter::operator*: Attempt to dereference an out-of-range iterator");
    }
    {
      auto it = str.rend();
      TEST_LIBCPP_ASSERT_FAILURE(
          it.operator->(), "__bounded_iter::operator->: Attempt to dereference an out-of-range iterator");
    }
    {
      auto it = str.rbegin();
      TEST_LIBCPP_ASSERT_FAILURE(it[99], "__bounded_iter::operator*: Attempt to dereference an out-of-range iterator");
    }
  }

  // string_view::const_reverse_iterator
  {
    std::string_view const str("hello world");
    {
      auto it = str.crend();
      TEST_LIBCPP_ASSERT_FAILURE(*it, "__bounded_iter::operator*: Attempt to dereference an out-of-range iterator");
    }
    {
      auto it = str.crend();
      TEST_LIBCPP_ASSERT_FAILURE(
          it.operator->(), "__bounded_iter::operator->: Attempt to dereference an out-of-range iterator");
    }
    {
      auto it = str.crbegin();
      TEST_LIBCPP_ASSERT_FAILURE(it[99], "__bounded_iter::operator*: Attempt to dereference an out-of-range iterator");
    }
  }

  return 0;
}