// Copyright 2026 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <cstdint>
#include <vector>

#include "base/containers/span.h"
#include "base/numerics/safe_conversions.h"

void fct() {
  auto buf = std::vector<char>(10, 1);
  // Expected rewrite:
  // base::span<char> expected_data = buf;
  base::span<char> expected_data = buf;
  expected_data[0] = 1;

  int index = 1;
  // This parenthesized expression should not cause a crash.
  // Expected rewrite:
  // char* temp =
  //     expected_data.subspan(base::checked_cast<size_t>((index))).data();
  char* temp =
      expected_data.subspan(base::checked_cast<size_t>((index))).data();

  // Test multiple nested parentheses
  // Expected rewrite:
  // char* temp2 =
  //     expected_data.subspan(base::checked_cast<size_t>(((index)))).data();
  char* temp2 =
      expected_data.subspan(base::checked_cast<size_t>(((index)))).data();

  // Expected rewrite:
  // char* temp3 =
  //     expected_data
  //         .subspan(base::checked_cast<size_t>(((index * 4) / (index * 2))))
  //         .data();
  char* temp3 =
      expected_data
          .subspan(base::checked_cast<size_t>(((index * 4) / (index * 2))))
          .data();
}