✨ Added clang prettier plugin

frontend/src/common/prettier/plugins/clang/CustomFileSystem.cc

@@ -0,0 +1,117 @@
+#include "CustomFileSystem.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/Path.h"
+#include <emscripten.h>
+#include <iostream>
+#include <string>
+#include <system_error>
+
+using namespace llvm;
+using namespace llvm::vfs;
+
+namespace {
+
+bool isRunningOnWindows() {
+  return EM_ASM_INT({return process.platform == 'win32' ? 1 : 0}) == 1;
+}
+
+std::error_code current_path(SmallVectorImpl<char> &result) {
+  result.clear();
+
+  const char *pwd = ::getenv("PWD");
+  result.append(pwd, pwd + strlen(pwd));
+
+  return {};
+}
+
+} // namespace
+
+namespace llvm {
+namespace vfs {
+
+sys::path::Style getPathStyle() {
+  static sys::path::Style cachedStyle = sys::path::Style::native;
+
+  if (cachedStyle == sys::path::Style::native) {
+    cachedStyle = isRunningOnWindows() ? sys::path::Style::windows
+                                       : sys::path::Style::posix;
+  }
+
+  return cachedStyle;
+}
+
+void make_absolute(const Twine &current_directory,
+                   SmallVectorImpl<char> &path) {
+  StringRef p(path.data(), path.size());
+
+  auto pathStyle = getPathStyle();
+
+  bool rootDirectory = sys::path::has_root_directory(p, pathStyle);
+  bool rootName = sys::path::has_root_name(p, pathStyle);
+
+  // Already absolute.
+  if ((rootName || is_style_posix(pathStyle)) && rootDirectory)
+    return;
+
+  // All of the following conditions will need the current directory.
+  SmallString<128> current_dir;
+  current_directory.toVector(current_dir);
+
+  // Relative path. Prepend the current directory.
+  if (!rootName && !rootDirectory) {
+    // Append path to the current directory.
+    sys::path::append(current_dir, pathStyle, p);
+    // Set path to the result.
+    path.swap(current_dir);
+    return;
+  }
+
+  if (!rootName && rootDirectory) {
+    StringRef cdrn = sys::path::root_name(current_dir, pathStyle);
+    SmallString<128> curDirRootName(cdrn.begin(), cdrn.end());
+    sys::path::append(curDirRootName, pathStyle, p);
+    // Set path to the result.
+    path.swap(curDirRootName);
+    return;
+  }
+
+  if (rootName && !rootDirectory) {
+    StringRef pRootName = sys::path::root_name(p, pathStyle);
+    StringRef bRootDirectory =
+        sys::path::root_directory(current_dir, pathStyle);
+    StringRef bRelativePath = sys::path::relative_path(current_dir, pathStyle);
+    StringRef pRelativePath = sys::path::relative_path(p, pathStyle);
+
+    SmallString<128> res;
+    sys::path::append(res, pathStyle, pRootName, bRootDirectory, bRelativePath,
+                      pRelativePath);
+    path.swap(res);
+    return;
+  }
+
+  llvm_unreachable("All rootName and rootDirectory combinations should have "
+                   "occurred above!");
+}
+
+std::error_code make_absolute(SmallVectorImpl<char> &path) {
+  if (sys::path::is_absolute(path, getPathStyle()))
+    return {};
+
+  SmallString<128> current_dir;
+  if (std::error_code ec = current_path(current_dir))
+    return ec;
+
+  make_absolute(current_dir, path);
+  return {};
+}
+
+CustomFileSystem::CustomFileSystem(IntrusiveRefCntPtr<FileSystem> FS)
+    : ProxyFileSystem(std::move(FS)) {}
+
+std::error_code
+CustomFileSystem::makeAbsolute(SmallVectorImpl<char> &Path) const {
+  return make_absolute(Path);
+}
+
+} // namespace vfs
+} // namespace llvm

frontend/src/common/prettier/plugins/clang/CustomFileSystem.h

@@ -0,0 +1,27 @@
+#ifndef CUSTOM_FILE_SYSTEM_H
+#define CUSTOM_FILE_SYSTEM_H
+
+#include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/Support/ErrorOr.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/VirtualFileSystem.h"
+
+namespace llvm {
+namespace vfs {
+
+sys::path::Style getPathStyle();
+std::error_code make_absolute(SmallVectorImpl<char> &path);
+
+class CustomFileSystem : public ProxyFileSystem {
+public:
+  CustomFileSystem(IntrusiveRefCntPtr<FileSystem> FS);
+
+  std::error_code makeAbsolute(SmallVectorImpl<char> &Path) const override;
+};
+
+} // namespace vfs
+} // namespace llvm
+
+#endif // CUSTOM_FILE_SYSTEM_H

frontend/src/common/prettier/plugins/clang/binding.cc

@@ -0,0 +1,26 @@
+#include "lib.h"
+#include <emscripten/bind.h>
+
+using namespace emscripten;
+
+EMSCRIPTEN_BINDINGS(my_module) {
+  register_vector<unsigned>("RangeList");
+
+  value_object<Result>("Result")
+      .field("error", &Result::error)
+      .field("content", &Result::content);
+
+  function<std::string>("version", &version);
+  function<Result, const std::string, const std::string, const std::string>(
+      "format", &format);
+  function<Result, const std::string, const std::string, const std::string,
+           const std::vector<unsigned>>("format_byte", &format_byte);
+  function<Result, const std::string, const std::string, const std::string,
+           const std::vector<unsigned>>("format_line", &format_line);
+  function<void, const std::string>("set_fallback_style", &set_fallback_style);
+  function<void, bool>("set_sort_includes", &set_sort_includes);
+  function<Result, const std::string, const std::string, const std::string>(
+      "dump_config", &dump_config);
+}
+
+int main(void) {}

frontend/src/common/prettier/plugins/clang/clang-format-diff.py

@@ -0,0 +1,197 @@
+#!/usr/bin/env python3
+#
+# ===- clang-format-diff.py - ClangFormat Diff Reformatter ----*- python -*--===#
+#
+# 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
+#
+# ===------------------------------------------------------------------------===#
+
+"""
+This script reads input from a unified diff and reformats all the changed
+lines. This is useful to reformat all the lines touched by a specific patch.
+Example usage for git/svn users:
+
+  git diff -U0 --no-color --relative HEAD^ | {clang_format_diff} -p1 -i
+  svn diff --diff-cmd=diff -x-U0 | {clang_format_diff} -i
+
+It should be noted that the filename contained in the diff is used unmodified
+to determine the source file to update. Users calling this script directly
+should be careful to ensure that the path in the diff is correct relative to the
+current working directory.
+"""
+from __future__ import absolute_import, division, print_function
+
+import argparse
+import difflib
+import re
+import subprocess
+import sys
+
+if sys.version_info.major >= 3:
+    from io import StringIO
+else:
+    from io import BytesIO as StringIO
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description=__doc__.format(clang_format_diff="%(prog)s"),
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+    )
+    parser.add_argument(
+        "-i",
+        action="store_true",
+        default=False,
+        help="apply edits to files instead of displaying a diff",
+    )
+    parser.add_argument(
+        "-p",
+        metavar="NUM",
+        default=0,
+        help="strip the smallest prefix containing P slashes",
+    )
+    parser.add_argument(
+        "-regex",
+        metavar="PATTERN",
+        default=None,
+        help="custom pattern selecting file paths to reformat "
+        "(case sensitive, overrides -iregex)",
+    )
+    parser.add_argument(
+        "-iregex",
+        metavar="PATTERN",
+        default=r".*\.(?:cpp|cc|c\+\+|cxx|cppm|ccm|cxxm|c\+\+m|c|cl|h|hh|hpp"
+        r"|hxx|m|mm|inc|js|ts|proto|protodevel|java|cs|json|ipynb|s?vh?)",
+        help="custom pattern selecting file paths to reformat "
+        "(case insensitive, overridden by -regex)",
+    )
+    parser.add_argument(
+        "-sort-includes",
+        action="store_true",
+        default=False,
+        help="let clang-format sort include blocks",
+    )
+    parser.add_argument(
+        "-v",
+        "--verbose",
+        action="store_true",
+        help="be more verbose, ineffective without -i",
+    )
+    parser.add_argument(
+        "-style",
+        help="formatting style to apply (LLVM, GNU, Google, Chromium, "
+        "Microsoft, Mozilla, WebKit)",
+    )
+    parser.add_argument(
+        "-fallback-style",
+        help="The name of the predefined style used as a"
+        "fallback in case clang-format is invoked with"
+        "-style=file, but can not find the .clang-format"
+        "file to use.",
+    )
+    parser.add_argument(
+        "-binary",
+        default="clang-format",
+        help="location of binary to use for clang-format",
+    )
+    args = parser.parse_args()
+
+    # Extract changed lines for each file.
+    filename = None
+    lines_by_file = {}
+    for line in sys.stdin:
+        match = re.search(r"^\+\+\+\ (.*?/){%s}(.+)" % args.p, line.rstrip())
+        if match:
+            filename = match.group(2)
+        if filename is None:
+            continue
+
+        if args.regex is not None:
+            if not re.match("^%s$" % args.regex, filename):
+                continue
+        else:
+            if not re.match("^%s$" % args.iregex, filename, re.IGNORECASE):
+                continue
+
+        match = re.search(r"^@@.*\+(\d+)(?:,(\d+))?", line)
+        if match:
+            start_line = int(match.group(1))
+            line_count = 1
+            if match.group(2):
+                line_count = int(match.group(2))
+                # The input is something like
+                #
+                # @@ -1, +0,0 @@
+                #
+                # which means no lines were added.
+                if line_count == 0:
+                    continue
+            # Also format lines range if line_count is 0 in case of deleting
+            # surrounding statements.
+            end_line = start_line
+            if line_count != 0:
+                end_line += line_count - 1
+            lines_by_file.setdefault(filename, []).extend(
+                ["--lines", str(start_line) + ":" + str(end_line)]
+            )
+
+    # Reformat files containing changes in place.
+    has_diff = False
+    for filename, lines in lines_by_file.items():
+        if args.i and args.verbose:
+            print("Formatting {}".format(filename))
+        command = [args.binary, filename]
+        if args.i:
+            command.append("-i")
+        if args.sort_includes:
+            command.append("--sort-includes")
+        command.extend(lines)
+        if args.style:
+            command.extend(["--style", args.style])
+        if args.fallback_style:
+            command.extend(["--fallback-style", args.fallback_style])
+
+        try:
+            p = subprocess.Popen(
+                command,
+                stdout=subprocess.PIPE,
+                stderr=None,
+                stdin=subprocess.PIPE,
+                universal_newlines=True,
+            )
+        except OSError as e:
+            # Give the user more context when clang-format isn't
+            # found/isn't executable, etc.
+            raise RuntimeError(
+                'Failed to run "%s" - %s"' % (" ".join(command), e.strerror)
+            )
+
+        stdout, _stderr = p.communicate()
+        if p.returncode != 0:
+            return p.returncode
+
+        if not args.i:
+            with open(filename) as f:
+                code = f.readlines()
+            formatted_code = StringIO(stdout).readlines()
+            diff = difflib.unified_diff(
+                code,
+                formatted_code,
+                filename,
+                filename,
+                "(before formatting)",
+                "(after formatting)",
+            )
+            diff_string = "".join(diff)
+            if len(diff_string) > 0:
+                has_diff = True
+                sys.stdout.write(diff_string)
+
+    if has_diff:
+        return 1
+
+
+if __name__ == "__main__":
+    sys.exit(main())

frontend/src/common/prettier/plugins/clang/clang-format-node.js

@@ -0,0 +1,10 @@
+import fs from "node:fs/promises";
+import initAsync from "./clang-format.js";
+
+const wasm = new URL("./clang-format.wasm", import.meta.url);
+
+export default function (init = fs.readFile(wasm)) {
+    return initAsync(init);
+}
+
+export * from "./clang-format.js";

frontend/src/common/prettier/plugins/clang/clang-format-vite.js

@@ -0,0 +1,8 @@
+import initAsync from "./clang-format.js";
+import wasm from "./clang-format.wasm?url";
+
+export default function (input = wasm) {
+    return initAsync(input);
+}
+
+export * from "./clang-format.js";

frontend/src/common/prettier/plugins/clang/clang-format.d.ts

@@ -0,0 +1,175 @@
+export type InitInput =
+	| RequestInfo
+	| URL
+	| Response
+	| BufferSource
+	| WebAssembly.Module;
+
+export default function init(input?: InitInput): Promise<void>;
+
+/**
+ * The style to use for formatting.
+ * Supported style values are:
+ *  - `LLVM` - A style complying with the LLVM coding standards.
+ *  - `Google` - A style complying with Google’s C++ style guide.
+ *  - `Chromium` - A style complying with Chromium’s style guide.
+ *  - `Mozilla` - A style complying with Mozilla’s style guide.
+ *  - `WebKit` - A style complying with WebKit’s style guide.
+ *  - `Microsoft` - A style complying with Microsoft’s style guide.
+ *  - `GNU` - A style complying with the GNU coding standards.
+ *  - A string starting with `{`, for example: `{BasedOnStyle: Chromium, IndentWidth: 4, ...}`.
+ *  - A string which represents `.clang-format` content.
+ *
+ */
+export type Style =
+	| "LLVM"
+	| "Google"
+	| "Chromium"
+	| "Mozilla"
+	| "WebKit"
+	| "Microsoft"
+	| "GNU"
+	| (string & {});
+
+/**
+ * The filename to use for determining the language.
+ */
+export type Filename =
+	| "main.c"
+	| "main.cc"
+	| "main.cxx"
+	| "main.cpp"
+	| "main.java"
+	| "main.js"
+	| "main.mjs"
+	| "main.ts"
+	| "main.json"
+	| "main.m"
+	| "main.mm"
+	| "main.proto"
+	| "main.cs"
+	| (string & {});
+
+/**
+ * Formats the given content using the specified style.
+ *
+ * @param {string} content - The content to format.
+ * @param {Filename} filename - The filename to use for determining the language.
+ * @param {Style} style - The style to use for formatting.
+ *   Supported style values are:
+ *   - `LLVM` - A style complying with the LLVM coding standards.
+ *   - `Google` - A style complying with Google’s C++ style guide.
+ *   - `Chromium` - A style complying with Chromium’s style guide.
+ *   - `Mozilla` - A style complying with Mozilla’s style guide.
+ *   - `WebKit` - A style complying with WebKit’s style guide.
+ *   - `Microsoft` - A style complying with Microsoft’s style guide.
+ *   - `GNU` - A style complying with the GNU coding standards.
+ *   - A string starting with `{`, for example: `{BasedOnStyle: Chromium, IndentWidth: 4, ...}`.
+ *   - A string which represents `.clang-format` content.
+ *
+ * @returns {string} The formatted content.
+ * @throws {Error}
+ *
+ * @see {@link https://clang.llvm.org/docs/ClangFormatStyleOptions.html}
+ */
+export declare function format(
+	content: string,
+	filename?: Filename,
+	style?: Style,
+): string;
+
+/**
+ * Both the startLine and endLine are 1-based.
+ */
+export type LineRange = [startLine: number, endLine: number];
+
+/**
+ * Both the offset and length are measured in bytes.
+ */
+export type ByteRange = [offset: number, length: number];
+
+/**
+ * Formats the specified range of lines in the given content using the specified style.
+ *
+ * @param {string} content - The content to format.
+ * @param {LineRange[]} range - Array<[startLine, endLine]> - The range of lines to format.
+ * Both startLine and endLine are 1-based.
+ * Multiple ranges can be formatted by specifying several lines arguments.
+ * @param {Filename} filename - The filename to use for determining the language.
+ * @param {Style} style - The style to use for formatting.
+ *   Supported style values are:
+ *   - `LLVM` - A style complying with the LLVM coding standards.
+ *   - `Google` - A style complying with Google’s C++ style guide.
+ *   - `Chromium` - A style complying with Chromium’s style guide.
+ *   - `Mozilla` - A style complying with Mozilla’s style guide.
+ *   - `WebKit` - A style complying with WebKit’s style guide.
+ *   - `Microsoft` - A style complying with Microsoft’s style guide.
+ *   - `GNU` - A style complying with the GNU coding standards.
+ *   - A string starting with `{`, for example: `{BasedOnStyle: Chromium, IndentWidth: 4, ...}`.
+ *   - A string which represents `.clang-format` content.
+ *
+ * @returns {string} The formatted content.
+ * @throws {Error}
+ *
+ * @see {@link https://clang.llvm.org/docs/ClangFormatStyleOptions.html}
+ */
+export declare function format_line_range(
+	content: string,
+	range: ByteRange[] | [[offset: number]],
+	filename?: Filename,
+	style?: Style,
+): string;
+
+/**
+ * @deprecated Use `format_line_range` instead.
+ */
+export declare function formatLineRange(
+	content: string,
+	range: ByteRange[] | [[offset: number]],
+	filename?: Filename,
+	style?: Style,
+): string;
+
+/**
+ * Formats the specified range of bytes in the given content using the specified style.
+ *
+ * @param {string} content - The content to format.
+ * @param {ByteRange[]} range - Array<[offset, length]> - The range of bytes to format.
+ * @param {Filename} filename - The filename to use for determining the language.
+ * @param {Style} style - The style to use for formatting.
+ *   Supported style values are:
+ *   - `LLVM` - A style complying with the LLVM coding standards.
+ *   - `Google` - A style complying with Google’s C++ style guide.
+ *   - `Chromium` - A style complying with Chromium’s style guide.
+ *   - `Mozilla` - A style complying with Mozilla’s style guide.
+ *   - `WebKit` - A style complying with WebKit’s style guide.
+ *   - `Microsoft` - A style complying with Microsoft’s style guide.
+ *   - `GNU` - A style complying with the GNU coding standards.
+ *   - A string starting with `{`, for example: `{BasedOnStyle: Chromium, IndentWidth: 4, ...}`.
+ *   - A string which represents `.clang-format` content.
+ *
+ * @returns {string} The formatted content.
+ * @throws {Error}
+ *
+ * @see {@link https://clang.llvm.org/docs/ClangFormatStyleOptions.html}
+ */
+export declare function format_byte_range(
+	content: string,
+	range: LineRange[],
+	filename?: Filename,
+	style?: Style,
+): string;
+
+/**
+ * @deprecated Use `format_byte_range` instead.
+ */
+export declare function formatByteRange(
+	content: string,
+	range: LineRange[],
+	filename?: Filename,
+	style?: Style,
+): string;
+
+export declare function version(): string;
+
+export declare function set_fallback_style(style: Style): void;

frontend/src/common/prettier/plugins/clang/cli-pre.js

@@ -0,0 +1,3 @@
+Module.preRun = function customPreRun() {
+    ENV.PWD = process.cwd();
+}

frontend/src/common/prettier/plugins/clang/cli.cc

@@ -0,0 +1,748 @@
+//===-- clang-format/ClangFormat.cpp - Clang format tool ------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file implements a clang-format tool that automatically formats
+/// (fragments of) C++ code.
+///
+//===----------------------------------------------------------------------===//
+
+#include "clang/../../lib/Format/MatchFilePath.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/DiagnosticOptions.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Basic/Version.h"
+#include "clang/Format/Format.h"
+#include "clang/Rewrite/Core/Rewriter.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/InitLLVM.h"
+#include "llvm/Support/Process.h"
+#include <fstream>
+
+#include "CustomFileSystem.h"
+
+using namespace llvm;
+using clang::tooling::Replacements;
+
+static cl::opt<bool> Help("h", cl::desc("Alias for -help"), cl::Hidden);
+
+// Mark all our options with this category, everything else (except for -version
+// and -help) will be hidden.
+static cl::OptionCategory ClangFormatCategory("Clang-format options");
+
+static cl::list<unsigned>
+    Offsets("offset",
+            cl::desc("Format a range starting at this byte offset.\n"
+                     "Multiple ranges can be formatted by specifying\n"
+                     "several -offset and -length pairs.\n"
+                     "Can only be used with one input file."),
+            cl::cat(ClangFormatCategory));
+static cl::list<unsigned>
+    Lengths("length",
+            cl::desc("Format a range of this length (in bytes).\n"
+                     "Multiple ranges can be formatted by specifying\n"
+                     "several -offset and -length pairs.\n"
+                     "When only a single -offset is specified without\n"
+                     "-length, clang-format will format up to the end\n"
+                     "of the file.\n"
+                     "Can only be used with one input file."),
+            cl::cat(ClangFormatCategory));
+static cl::list<std::string>
+    LineRanges("lines",
+               cl::desc("<start line>:<end line> - format a range of\n"
+                        "lines (both 1-based).\n"
+                        "Multiple ranges can be formatted by specifying\n"
+                        "several -lines arguments.\n"
+                        "Can't be used with -offset and -length.\n"
+                        "Can only be used with one input file."),
+               cl::cat(ClangFormatCategory));
+static cl::opt<std::string>
+    Style("style", cl::desc(clang::format::StyleOptionHelpDescription),
+          cl::init(clang::format::DefaultFormatStyle),
+          cl::cat(ClangFormatCategory));
+static cl::opt<std::string>
+    FallbackStyle("fallback-style",
+                  cl::desc("The name of the predefined style used as a\n"
+                           "fallback in case clang-format is invoked with\n"
+                           "-style=file, but can not find the .clang-format\n"
+                           "file to use. Defaults to 'LLVM'.\n"
+                           "Use -fallback-style=none to skip formatting."),
+                  cl::init(clang::format::DefaultFallbackStyle),
+                  cl::cat(ClangFormatCategory));
+
+static cl::opt<std::string> AssumeFileName(
+    "assume-filename",
+    cl::desc("Set filename used to determine the language and to find\n"
+             ".clang-format file.\n"
+             "Only used when reading from stdin.\n"
+             "If this is not passed, the .clang-format file is searched\n"
+             "relative to the current working directory when reading stdin.\n"
+             "Unrecognized filenames are treated as C++.\n"
+             "supported:\n"
+             "  CSharp: .cs\n"
+             "  Java: .java\n"
+             "  JavaScript: .js .mjs .cjs .ts\n"
+             "  Json: .json .ipynb\n"
+             "  Objective-C: .m .mm\n"
+             "  Proto: .proto .protodevel\n"
+             "  TableGen: .td\n"
+             "  TextProto: .txtpb .textpb .pb.txt .textproto .asciipb\n"
+             "  Verilog: .sv .svh .v .vh"),
+    cl::init("<stdin>"), cl::cat(ClangFormatCategory));
+
+static cl::opt<bool> Inplace("i",
+                             cl::desc("Inplace edit <file>s, if specified."),
+                             cl::cat(ClangFormatCategory));
+
+static cl::opt<bool> OutputXML("output-replacements-xml",
+                               cl::desc("Output replacements as XML."),
+                               cl::cat(ClangFormatCategory));
+static cl::opt<bool>
+    DumpConfig("dump-config",
+               cl::desc("Dump configuration options to stdout and exit.\n"
+                        "Can be used with -style option."),
+               cl::cat(ClangFormatCategory));
+static cl::opt<unsigned>
+    Cursor("cursor",
+           cl::desc("The position of the cursor when invoking\n"
+                    "clang-format from an editor integration"),
+           cl::init(0), cl::cat(ClangFormatCategory));
+
+static cl::opt<bool>
+    SortIncludes("sort-includes",
+                 cl::desc("If set, overrides the include sorting behavior\n"
+                          "determined by the SortIncludes style flag"),
+                 cl::cat(ClangFormatCategory));
+
+static cl::opt<std::string> QualifierAlignment(
+    "qualifier-alignment",
+    cl::desc("If set, overrides the qualifier alignment style\n"
+             "determined by the QualifierAlignment style flag"),
+    cl::init(""), cl::cat(ClangFormatCategory));
+
+static cl::opt<std::string> Files(
+    "files",
+    cl::desc("A file containing a list of files to process, one per line."),
+    cl::value_desc("filename"), cl::init(""), cl::cat(ClangFormatCategory));
+
+static cl::opt<bool>
+    Verbose("verbose", cl::desc("If set, shows the list of processed files"),
+            cl::cat(ClangFormatCategory));
+
+// Use --dry-run to match other LLVM tools when you mean do it but don't
+// actually do it
+static cl::opt<bool>
+    DryRun("dry-run",
+           cl::desc("If set, do not actually make the formatting changes"),
+           cl::cat(ClangFormatCategory));
+
+// Use -n as a common command as an alias for --dry-run. (git and make use -n)
+static cl::alias DryRunShort("n", cl::desc("Alias for --dry-run"),
+                             cl::cat(ClangFormatCategory), cl::aliasopt(DryRun),
+                             cl::NotHidden);
+
+// Emulate being able to turn on/off the warning.
+static cl::opt<bool>
+    WarnFormat("Wclang-format-violations",
+               cl::desc("Warnings about individual formatting changes needed. "
+                        "Used only with --dry-run or -n"),
+               cl::init(true), cl::cat(ClangFormatCategory), cl::Hidden);
+
+static cl::opt<bool>
+    NoWarnFormat("Wno-clang-format-violations",
+                 cl::desc("Do not warn about individual formatting changes "
+                          "needed. Used only with --dry-run or -n"),
+                 cl::init(false), cl::cat(ClangFormatCategory), cl::Hidden);
+
+static cl::opt<unsigned> ErrorLimit(
+    "ferror-limit",
+    cl::desc("Set the maximum number of clang-format errors to emit\n"
+             "before stopping (0 = no limit).\n"
+             "Used only with --dry-run or -n"),
+    cl::init(0), cl::cat(ClangFormatCategory));
+
+static cl::opt<bool>
+    WarningsAsErrors("Werror",
+                     cl::desc("If set, changes formatting warnings to errors"),
+                     cl::cat(ClangFormatCategory));
+
+namespace {
+enum class WNoError { Unknown };
+}
+
+static cl::bits<WNoError> WNoErrorList(
+    "Wno-error",
+    cl::desc("If set, don't error out on the specified warning type."),
+    cl::values(
+        clEnumValN(WNoError::Unknown, "unknown",
+                   "If set, unknown format options are only warned about.\n"
+                   "This can be used to enable formatting, even if the\n"
+                   "configuration contains unknown (newer) options.\n"
+                   "Use with caution, as this might lead to dramatically\n"
+                   "differing format depending on an option being\n"
+                   "supported or not.")),
+    cl::cat(ClangFormatCategory));
+
+static cl::opt<bool>
+    ShowColors("fcolor-diagnostics",
+               cl::desc("If set, and on a color-capable terminal controls "
+                        "whether or not to print diagnostics in color"),
+               cl::init(true), cl::cat(ClangFormatCategory), cl::Hidden);
+
+static cl::opt<bool>
+    NoShowColors("fno-color-diagnostics",
+                 cl::desc("If set, and on a color-capable terminal controls "
+                          "whether or not to print diagnostics in color"),
+                 cl::init(false), cl::cat(ClangFormatCategory), cl::Hidden);
+
+static cl::list<std::string> FileNames(cl::Positional,
+                                       cl::desc("[@<file>] [<file> ...]"),
+                                       cl::cat(ClangFormatCategory));
+
+static cl::opt<bool> FailOnIncompleteFormat(
+    "fail-on-incomplete-format",
+    cl::desc("If set, fail with exit code 1 on incomplete format."),
+    cl::init(false), cl::cat(ClangFormatCategory));
+
+static cl::opt<bool> ListIgnored("list-ignored",
+                                 cl::desc("List ignored files."),
+                                 cl::cat(ClangFormatCategory), cl::Hidden);
+
+namespace clang {
+namespace format {
+
+static FileID createInMemoryFile(StringRef FileName, MemoryBufferRef Source,
+                                 SourceManager &Sources, FileManager &Files,
+                                 llvm::vfs::InMemoryFileSystem *MemFS) {
+  MemFS->addFileNoOwn(FileName, 0, Source);
+  auto File = Files.getOptionalFileRef(FileName);
+  assert(File && "File not added to MemFS?");
+  return Sources.createFileID(*File, SourceLocation(), SrcMgr::C_User);
+}
+
+// Parses <start line>:<end line> input to a pair of line numbers.
+// Returns true on error.
+static bool parseLineRange(StringRef Input, unsigned &FromLine,
+                           unsigned &ToLine) {
+  std::pair<StringRef, StringRef> LineRange = Input.split(':');
+  return LineRange.first.getAsInteger(0, FromLine) ||
+         LineRange.second.getAsInteger(0, ToLine);
+}
+
+static bool fillRanges(MemoryBuffer *Code,
+                       std::vector<tooling::Range> &Ranges) {
+  IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> InMemoryFileSystem(
+      new llvm::vfs::InMemoryFileSystem);
+  FileManager Files(FileSystemOptions(), InMemoryFileSystem);
+  DiagnosticOptions DiagOpts;
+  DiagnosticsEngine Diagnostics(
+      IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs), DiagOpts);
+  SourceManager Sources(Diagnostics, Files);
+  const auto ID = createInMemoryFile("<irrelevant>", *Code, Sources, Files,
+                                     InMemoryFileSystem.get());
+  if (!LineRanges.empty()) {
+    if (!Offsets.empty() || !Lengths.empty()) {
+      errs() << "error: cannot use -lines with -offset/-length\n";
+      return true;
+    }
+
+    for (const auto &LineRange : LineRanges) {
+      unsigned FromLine, ToLine;
+      if (parseLineRange(LineRange, FromLine, ToLine)) {
+        errs() << "error: invalid <start line>:<end line> pair\n";
+        return true;
+      }
+      if (FromLine < 1) {
+        errs() << "error: start line should be at least 1\n";
+        return true;
+      }
+      if (FromLine > ToLine) {
+        errs() << "error: start line should not exceed end line\n";
+        return true;
+      }
+      const auto Start = Sources.translateLineCol(ID, FromLine, 1);
+      const auto End = Sources.translateLineCol(ID, ToLine, UINT_MAX);
+      if (Start.isInvalid() || End.isInvalid())
+        return true;
+      const auto Offset = Sources.getFileOffset(Start);
+      const auto Length = Sources.getFileOffset(End) - Offset;
+      Ranges.push_back(tooling::Range(Offset, Length));
+    }
+    return false;
+  }
+
+  if (Offsets.empty())
+    Offsets.push_back(0);
+  const bool EmptyLengths = Lengths.empty();
+  unsigned Length = 0;
+  if (Offsets.size() == 1 && EmptyLengths) {
+    Length = Sources.getFileOffset(Sources.getLocForEndOfFile(ID)) - Offsets[0];
+  } else if (Offsets.size() != Lengths.size()) {
+    errs() << "error: number of -offset and -length arguments must match.\n";
+    return true;
+  }
+  for (unsigned I = 0, E = Offsets.size(), CodeSize = Code->getBufferSize();
+       I < E; ++I) {
+    const auto Offset = Offsets[I];
+    if (Offset >= CodeSize) {
+      errs() << "error: offset " << Offset << " is outside the file\n";
+      return true;
+    }
+    if (!EmptyLengths)
+      Length = Lengths[I];
+    if (Offset + Length > CodeSize) {
+      errs() << "error: invalid length " << Length << ", offset + length ("
+             << Offset + Length << ") is outside the file.\n";
+      return true;
+    }
+    Ranges.push_back(tooling::Range(Offset, Length));
+  }
+  return false;
+}
+
+static void outputReplacementXML(StringRef Text) {
+  // FIXME: When we sort includes, we need to make sure the stream is correct
+  // utf-8.
+  size_t From = 0;
+  size_t Index;
+  while ((Index = Text.find_first_of("\n\r<&", From)) != StringRef::npos) {
+    outs() << Text.substr(From, Index - From);
+    switch (Text[Index]) {
+    case '\n':
+      outs() << "&#10;";
+      break;
+    case '\r':
+      outs() << "&#13;";
+      break;
+    case '<':
+      outs() << "&lt;";
+      break;
+    case '&':
+      outs() << "&amp;";
+      break;
+    default:
+      llvm_unreachable("Unexpected character encountered!");
+    }
+    From = Index + 1;
+  }
+  outs() << Text.substr(From);
+}
+
+static void outputReplacementsXML(const Replacements &Replaces) {
+  for (const auto &R : Replaces) {
+    outs() << "<replacement "
+           << "offset='" << R.getOffset() << "' "
+           << "length='" << R.getLength() << "'>";
+    outputReplacementXML(R.getReplacementText());
+    outs() << "</replacement>\n";
+  }
+}
+
+static bool
+emitReplacementWarnings(const Replacements &Replaces, StringRef AssumedFileName,
+                        const std::unique_ptr<llvm::MemoryBuffer> &Code) {
+  unsigned Errors = 0;
+  if (WarnFormat && !NoWarnFormat) {
+    SourceMgr Mgr;
+    const char *StartBuf = Code->getBufferStart();
+
+    Mgr.AddNewSourceBuffer(
+        MemoryBuffer::getMemBuffer(StartBuf, AssumedFileName), SMLoc());
+    for (const auto &R : Replaces) {
+      SMDiagnostic Diag = Mgr.GetMessage(
+          SMLoc::getFromPointer(StartBuf + R.getOffset()),
+          WarningsAsErrors ? SourceMgr::DiagKind::DK_Error
+                           : SourceMgr::DiagKind::DK_Warning,
+          "code should be clang-formatted [-Wclang-format-violations]");
+
+      Diag.print(nullptr, llvm::errs(), ShowColors && !NoShowColors);
+      if (ErrorLimit && ++Errors >= ErrorLimit)
+        break;
+    }
+  }
+  return WarningsAsErrors;
+}
+
+static void outputXML(const Replacements &Replaces,
+                      const Replacements &FormatChanges,
+                      const FormattingAttemptStatus &Status,
+                      const cl::opt<unsigned> &Cursor,
+                      unsigned CursorPosition) {
+  outs() << "<?xml version='1.0'?>\n<replacements "
+            "xml:space='preserve' incomplete_format='"
+         << (Status.FormatComplete ? "false" : "true") << "'";
+  if (!Status.FormatComplete)
+    outs() << " line='" << Status.Line << "'";
+  outs() << ">\n";
+  if (Cursor.getNumOccurrences() != 0) {
+    outs() << "<cursor>" << FormatChanges.getShiftedCodePosition(CursorPosition)
+           << "</cursor>\n";
+  }
+
+  outputReplacementsXML(Replaces);
+  outs() << "</replacements>\n";
+}
+
+class ClangFormatDiagConsumer : public DiagnosticConsumer {
+  virtual void anchor() {}
+
+  void HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
+                        const Diagnostic &Info) override {
+
+    SmallVector<char, 16> vec;
+    Info.FormatDiagnostic(vec);
+    errs() << "clang-format error:" << vec << "\n";
+  }
+};
+
+// Returns true on error.
+static bool format(StringRef FileName, bool ErrorOnIncompleteFormat = false) {
+  const bool IsSTDIN = FileName == "-";
+  if (!OutputXML && Inplace && IsSTDIN) {
+    errs() << "error: cannot use -i when reading from stdin.\n";
+    return true;
+  }
+  // On Windows, overwriting a file with an open file mapping doesn't work,
+  // so read the whole file into memory when formatting in-place.
+  ErrorOr<std::unique_ptr<MemoryBuffer>> CodeOrErr =
+      !OutputXML && Inplace
+          ? MemoryBuffer::getFileAsStream(FileName)
+          : MemoryBuffer::getFileOrSTDIN(FileName, /*IsText=*/true);
+  if (std::error_code EC = CodeOrErr.getError()) {
+    errs() << FileName << ": " << EC.message() << "\n";
+    return true;
+  }
+  std::unique_ptr<llvm::MemoryBuffer> Code = std::move(CodeOrErr.get());
+  if (Code->getBufferSize() == 0)
+    return false; // Empty files are formatted correctly.
+
+  StringRef BufStr = Code->getBuffer();
+
+  const char *InvalidBOM = SrcMgr::ContentCache::getInvalidBOM(BufStr);
+
+  if (InvalidBOM) {
+    errs() << "error: encoding with unsupported byte order mark \""
+           << InvalidBOM << "\" detected";
+    if (!IsSTDIN)
+      errs() << " in file '" << FileName << "'";
+    errs() << ".\n";
+    return true;
+  }
+
+  std::vector<tooling::Range> Ranges;
+  if (fillRanges(Code.get(), Ranges))
+    return true;
+  StringRef AssumedFileName = IsSTDIN ? AssumeFileName : FileName;
+  if (AssumedFileName.empty()) {
+    llvm::errs() << "error: empty filenames are not allowed\n";
+    return true;
+  }
+
+  auto RealFS = vfs::getRealFileSystem();
+  auto CustomFS = new vfs::CustomFileSystem(RealFS);
+  IntrusiveRefCntPtr<vfs::FileSystem> CustomFSPtr(CustomFS);
+  Expected<FormatStyle> FormatStyle =
+      getStyle(Style, AssumedFileName, FallbackStyle, Code->getBuffer(),
+               CustomFSPtr.get(), WNoErrorList.isSet(WNoError::Unknown));
+  if (!FormatStyle) {
+    llvm::errs() << toString(FormatStyle.takeError()) << "\n";
+    return true;
+  }
+
+  StringRef QualifierAlignmentOrder = QualifierAlignment;
+
+  FormatStyle->QualifierAlignment =
+      StringSwitch<FormatStyle::QualifierAlignmentStyle>(
+          QualifierAlignmentOrder.lower())
+          .Case("right", FormatStyle::QAS_Right)
+          .Case("left", FormatStyle::QAS_Left)
+          .Default(FormatStyle->QualifierAlignment);
+
+  if (FormatStyle->QualifierAlignment == FormatStyle::QAS_Left) {
+    FormatStyle->QualifierOrder = {"const", "volatile", "type"};
+  } else if (FormatStyle->QualifierAlignment == FormatStyle::QAS_Right) {
+    FormatStyle->QualifierOrder = {"type", "const", "volatile"};
+  } else if (QualifierAlignmentOrder.contains("type")) {
+    FormatStyle->QualifierAlignment = FormatStyle::QAS_Custom;
+    SmallVector<StringRef> Qualifiers;
+    QualifierAlignmentOrder.split(Qualifiers, " ", /*MaxSplit=*/-1,
+                                  /*KeepEmpty=*/false);
+    FormatStyle->QualifierOrder = {Qualifiers.begin(), Qualifiers.end()};
+  }
+
+  if (SortIncludes.getNumOccurrences() != 0) {
+    FormatStyle->SortIncludes = {};
+    if (SortIncludes)
+      FormatStyle->SortIncludes.Enabled = true;
+  }
+  unsigned CursorPosition = Cursor;
+  Replacements Replaces = sortIncludes(*FormatStyle, Code->getBuffer(), Ranges,
+                                       AssumedFileName, &CursorPosition);
+
+  const bool IsJson = FormatStyle->isJson();
+
+  // To format JSON insert a variable to trick the code into thinking its
+  // JavaScript.
+  if (IsJson && !FormatStyle->DisableFormat) {
+    auto Err =
+        Replaces.add(tooling::Replacement(AssumedFileName, 0, 0, "x = "));
+    if (Err)
+      llvm::errs() << "Bad Json variable insertion\n";
+  }
+
+  auto ChangedCode = tooling::applyAllReplacements(Code->getBuffer(), Replaces);
+  if (!ChangedCode) {
+    llvm::errs() << toString(ChangedCode.takeError()) << "\n";
+    return true;
+  }
+  // Get new affected ranges after sorting `#includes`.
+  Ranges = tooling::calculateRangesAfterReplacements(Replaces, Ranges);
+  FormattingAttemptStatus Status;
+  Replacements FormatChanges =
+      reformat(*FormatStyle, *ChangedCode, Ranges, AssumedFileName, &Status);
+  Replaces = Replaces.merge(FormatChanges);
+  if (DryRun) {
+    return Replaces.size() > (IsJson ? 1u : 0u) &&
+           emitReplacementWarnings(Replaces, AssumedFileName, Code);
+  }
+  if (OutputXML) {
+    outputXML(Replaces, FormatChanges, Status, Cursor, CursorPosition);
+  } else {
+    IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> InMemoryFileSystem(
+        new llvm::vfs::InMemoryFileSystem);
+    FileManager Files(FileSystemOptions(), InMemoryFileSystem);
+
+    DiagnosticOptions DiagOpts;
+    ClangFormatDiagConsumer IgnoreDiagnostics;
+    DiagnosticsEngine Diagnostics(
+        IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs), DiagOpts,
+        &IgnoreDiagnostics, false);
+    SourceManager Sources(Diagnostics, Files);
+    FileID ID = createInMemoryFile(AssumedFileName, *Code, Sources, Files,
+                                   InMemoryFileSystem.get());
+    Rewriter Rewrite(Sources, LangOptions());
+    tooling::applyAllReplacements(Replaces, Rewrite);
+    if (Inplace) {
+      if (Rewrite.overwriteChangedFiles())
+        return true;
+    } else {
+      if (Cursor.getNumOccurrences() != 0) {
+        outs() << "{ \"Cursor\": "
+               << FormatChanges.getShiftedCodePosition(CursorPosition)
+               << ", \"IncompleteFormat\": "
+               << (Status.FormatComplete ? "false" : "true");
+        if (!Status.FormatComplete)
+          outs() << ", \"Line\": " << Status.Line;
+        outs() << " }\n";
+      }
+      Rewrite.getEditBuffer(ID).write(outs());
+    }
+  }
+  return ErrorOnIncompleteFormat && !Status.FormatComplete;
+}
+
+} // namespace format
+} // namespace clang
+
+static void PrintVersion(raw_ostream &OS) {
+  OS << clang::getClangToolFullVersion("clang-format") << '\n';
+}
+
+// Dump the configuration.
+static int dumpConfig() {
+  std::unique_ptr<llvm::MemoryBuffer> Code;
+  // We can't read the code to detect the language if there's no file name.
+  if (!FileNames.empty()) {
+    // Read in the code in case the filename alone isn't enough to detect the
+    // language.
+    ErrorOr<std::unique_ptr<MemoryBuffer>> CodeOrErr =
+        MemoryBuffer::getFileOrSTDIN(FileNames[0], /*IsText=*/true);
+    if (std::error_code EC = CodeOrErr.getError()) {
+      llvm::errs() << EC.message() << "\n";
+      return 1;
+    }
+    Code = std::move(CodeOrErr.get());
+  }
+
+  auto RealFS = vfs::getRealFileSystem();
+  auto CustomFS = new vfs::CustomFileSystem(RealFS);
+  IntrusiveRefCntPtr<vfs::FileSystem> CustomFSPtr(CustomFS);
+
+  Expected<clang::format::FormatStyle> FormatStyle = clang::format::getStyle(
+      Style,
+      FileNames.empty() || FileNames[0] == "-" ? AssumeFileName : FileNames[0],
+      FallbackStyle, Code ? Code->getBuffer() : "", CustomFSPtr.get());
+  if (!FormatStyle) {
+    llvm::errs() << toString(FormatStyle.takeError()) << "\n";
+    return 1;
+  }
+  std::string Config = clang::format::configurationAsText(*FormatStyle);
+  outs() << Config << "\n";
+  return 0;
+}
+
+using String = SmallString<128>;
+static String IgnoreDir;             // Directory of .clang-format-ignore file.
+static String PrevDir;               // Directory of previous `FilePath`.
+static SmallVector<String> Patterns; // Patterns in .clang-format-ignore file.
+
+// Check whether `FilePath` is ignored according to the nearest
+// .clang-format-ignore file based on the rules below:
+// - A blank line is skipped.
+// - Leading and trailing spaces of a line are trimmed.
+// - A line starting with a hash (`#`) is a comment.
+// - A non-comment line is a single pattern.
+// - The slash (`/`) is used as the directory separator.
+// - A pattern is relative to the directory of the .clang-format-ignore file (or
+//   the root directory if the pattern starts with a slash).
+// - A pattern is negated if it starts with a bang (`!`).
+static bool isIgnored(StringRef FilePath) {
+  using namespace llvm::sys::fs;
+  if (!is_regular_file(FilePath))
+    return false;
+
+  String Path;
+  String AbsPath{FilePath};
+
+  auto PathStyle = vfs::getPathStyle();
+
+  using namespace llvm::sys::path;
+  vfs::make_absolute(AbsPath);
+  remove_dots(AbsPath, /*remove_dot_dot=*/true, PathStyle);
+
+  if (StringRef Dir{parent_path(AbsPath, PathStyle)}; PrevDir != Dir) {
+    PrevDir = Dir;
+
+    for (;;) {
+      Path = Dir;
+      append(Path, PathStyle, ".clang-format-ignore");
+      if (is_regular_file(Path))
+        break;
+      Dir = parent_path(Dir, PathStyle);
+      if (Dir.empty())
+        return false;
+    }
+
+    IgnoreDir = convert_to_slash(Dir, PathStyle);
+
+    std::ifstream IgnoreFile{Path.c_str()};
+    if (!IgnoreFile.good())
+      return false;
+
+    Patterns.clear();
+
+    for (std::string Line; std::getline(IgnoreFile, Line);) {
+      if (const auto Pattern{StringRef{Line}.trim()};
+          // Skip empty and comment lines.
+          !Pattern.empty() && Pattern[0] != '#') {
+        Patterns.push_back(Pattern);
+      }
+    }
+  }
+
+  if (IgnoreDir.empty())
+    return false;
+
+  const auto Pathname{convert_to_slash(AbsPath, PathStyle)};
+  for (const auto &Pat : Patterns) {
+    const bool IsNegated = Pat[0] == '!';
+    StringRef Pattern{Pat};
+    if (IsNegated)
+      Pattern = Pattern.drop_front();
+
+    if (Pattern.empty())
+      continue;
+
+    Pattern = Pattern.ltrim();
+
+    // `Pattern` is relative to `IgnoreDir` unless it starts with a slash.
+    // This doesn't support patterns containing drive names (e.g. `C:`).
+    if (Pattern[0] != '/') {
+      Path = IgnoreDir;
+      append(Path, Style::posix, Pattern);
+      remove_dots(Path, /*remove_dot_dot=*/true, Style::posix);
+      Pattern = Path;
+    }
+
+    if (clang::format::matchFilePath(Pattern, Pathname) == !IsNegated)
+      return true;
+  }
+
+  return false;
+}
+
+int main(int argc, const char **argv) {
+  InitLLVM X(argc, argv);
+
+  cl::HideUnrelatedOptions(ClangFormatCategory);
+
+  cl::SetVersionPrinter(PrintVersion);
+  cl::ParseCommandLineOptions(
+      argc, argv,
+      "A tool to format C/C++/Java/JavaScript/JSON/Objective-C/Protobuf/C# "
+      "code.\n\n"
+      "If no arguments are specified, it formats the code from standard input\n"
+      "and writes the result to the standard output.\n"
+      "If <file>s are given, it reformats the files. If -i is specified\n"
+      "together with <file>s, the files are edited in-place. Otherwise, the\n"
+      "result is written to the standard output.\n");
+
+  if (Help) {
+    cl::PrintHelpMessage();
+    return 0;
+  }
+
+  if (DumpConfig)
+    return dumpConfig();
+
+  if (!Files.empty()) {
+    std::ifstream ExternalFileOfFiles{std::string(Files)};
+    std::string Line;
+    unsigned LineNo = 1;
+    while (std::getline(ExternalFileOfFiles, Line)) {
+      FileNames.push_back(Line);
+      LineNo++;
+    }
+    errs() << "Clang-formatting " << LineNo << " files\n";
+  }
+
+  if (FileNames.empty()) {
+    if (isIgnored(AssumeFileName))
+      return 0;
+    return clang::format::format("-", FailOnIncompleteFormat);
+  }
+
+  if (FileNames.size() > 1 &&
+      (!Offsets.empty() || !Lengths.empty() || !LineRanges.empty())) {
+    errs() << "error: -offset, -length and -lines can only be used for "
+              "single file.\n";
+    return 1;
+  }
+
+  unsigned FileNo = 1;
+  bool Error = false;
+  for (const auto &FileName : FileNames) {
+    const bool Ignored = isIgnored(FileName);
+    if (ListIgnored) {
+      if (Ignored)
+        outs() << FileName << '\n';
+      continue;
+    }
+    if (Ignored)
+      continue;
+    if (Verbose) {
+      errs() << "Formatting [" << FileNo++ << "/" << FileNames.size() << "] "
+             << FileName << "\n";
+    }
+    Error |= clang::format::format(FileName, FailOnIncompleteFormat);
+  }
+  return Error ? 1 : 0;
+}

frontend/src/common/prettier/plugins/clang/git-clang-format

@@ -0,0 +1,858 @@
+#!/usr/bin/env python3
+#
+# ===- git-clang-format - ClangFormat Git Integration -------*- python -*--=== #
+#
+# 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
+#
+# ===----------------------------------------------------------------------=== #
+
+r"""
+clang-format git integration
+============================
+
+This file provides a clang-format integration for git. Put it somewhere in your
+path and ensure that it is executable. Then, "git clang-format" will invoke
+clang-format on the changes in current files or a specific commit.
+
+For further details, run:
+git clang-format -h
+
+Requires Python version >=3.8
+"""
+
+from __future__ import absolute_import, division, print_function
+import argparse
+import collections
+import contextlib
+import errno
+import os
+import re
+import subprocess
+import sys
+
+usage = "git clang-format [OPTIONS] [<commit>] [<commit>|--staged] [--] [<file>...]"
+
+desc = """
+If zero or one commits are given, run clang-format on all lines that differ
+between the working directory and <commit>, which defaults to HEAD.  Changes are
+only applied to the working directory, or in the stage/index.
+
+Examples:
+  To format staged changes, i.e everything that's been `git add`ed:
+    git clang-format
+
+  To also format everything touched in the most recent commit:
+    git clang-format HEAD~1
+
+  If you're on a branch off main, to format everything touched on your branch:
+    git clang-format main
+
+If two commits are given (requires --diff), run clang-format on all lines in the
+second <commit> that differ from the first <commit>.
+
+The following git-config settings set the default of the corresponding option:
+  clangFormat.binary
+  clangFormat.commit
+  clangFormat.extensions
+  clangFormat.style
+"""
+
+# Name of the temporary index file in which save the output of clang-format.
+# This file is created within the .git directory.
+temp_index_basename = "clang-format-index"
+
+
+Range = collections.namedtuple("Range", "start, count")
+
+
+def main():
+    config = load_git_config()
+
+    # In order to keep '--' yet allow options after positionals, we need to
+    # check for '--' ourselves.  (Setting nargs='*' throws away the '--', while
+    # nargs=argparse.REMAINDER disallows options after positionals.)
+    argv = sys.argv[1:]
+    try:
+        idx = argv.index("--")
+    except ValueError:
+        dash_dash = []
+    else:
+        dash_dash = argv[idx:]
+        argv = argv[:idx]
+
+    default_extensions = ",".join(
+        [
+            # From clang/lib/Frontend/FrontendOptions.cpp, all lower case
+            "c",
+            "h",  # C
+            "m",  # ObjC
+            "mm",  # ObjC++
+            "cc",
+            "cp",
+            "cpp",
+            "c++",
+            "cxx",
+            "hh",
+            "hpp",
+            "hxx",
+            "inc",  # C++
+            "ccm",
+            "cppm",
+            "cxxm",
+            "c++m",  # C++ Modules
+            "cu",
+            "cuh",  # CUDA
+            "cl",  # OpenCL
+            # Other languages that clang-format supports
+            "proto",
+            "protodevel",  # Protocol Buffers
+            "java",  # Java
+            "js",
+            "mjs",
+            "cjs",  # JavaScript
+            "ts",  # TypeScript
+            "cs",  # C Sharp
+            "json",
+            "ipynb",  # Json
+            "sv",
+            "svh",
+            "v",
+            "vh",  # Verilog
+            "td",  # TableGen
+            "txtpb",
+            "textpb",
+            "pb.txt",
+            "textproto",
+            "asciipb",  # TextProto
+        ]
+    )
+
+    p = argparse.ArgumentParser(
+        usage=usage,
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+        description=desc,
+    )
+    p.add_argument(
+        "--binary",
+        default=config.get("clangformat.binary", "clang-format"),
+        help="path to clang-format",
+    ),
+    p.add_argument(
+        "--commit",
+        default=config.get("clangformat.commit", "HEAD"),
+        help="default commit to use if none is specified",
+    ),
+    p.add_argument(
+        "--diff",
+        action="store_true",
+        help="print a diff instead of applying the changes",
+    )
+    p.add_argument(
+        "--diffstat",
+        action="store_true",
+        help="print a diffstat instead of applying the changes",
+    )
+    p.add_argument(
+        "--extensions",
+        default=config.get("clangformat.extensions", default_extensions),
+        help=(
+            "comma-separated list of file extensions to format, "
+            "excluding the period and case-insensitive"
+        ),
+    ),
+    p.add_argument(
+        "-f",
+        "--force",
+        action="store_true",
+        help="allow changes to unstaged files",
+    )
+    p.add_argument(
+        "-p", "--patch", action="store_true", help="select hunks interactively"
+    )
+    p.add_argument(
+        "-q",
+        "--quiet",
+        action="count",
+        default=0,
+        help="print less information",
+    )
+    p.add_argument(
+        "--staged",
+        "--cached",
+        action="store_true",
+        help="format lines in the stage instead of the working dir",
+    )
+    p.add_argument(
+        "--style",
+        default=config.get("clangformat.style", None),
+        help="passed to clang-format",
+    ),
+    p.add_argument(
+        "-v",
+        "--verbose",
+        action="count",
+        default=0,
+        help="print extra information",
+    )
+    p.add_argument(
+        "--diff_from_common_commit",
+        action="store_true",
+        help=(
+            "diff from the last common commit for commits in "
+            "separate branches rather than the exact point of the "
+            "commits"
+        ),
+    )
+    # We gather all the remaining positional arguments into 'args' since we need
+    # to use some heuristics to determine whether or not <commit> was present.
+    # However, to print pretty messages, we make use of metavar and help.
+    p.add_argument(
+        "args",
+        nargs="*",
+        metavar="<commit>",
+        help="revision from which to compute the diff",
+    )
+    p.add_argument(
+        "ignored",
+        nargs="*",
+        metavar="<file>...",
+        help="if specified, only consider differences in these files",
+    )
+    opts = p.parse_args(argv)
+
+    opts.verbose -= opts.quiet
+    del opts.quiet
+
+    commits, files = interpret_args(opts.args, dash_dash, opts.commit)
+    if len(commits) > 2:
+        die("at most two commits allowed; %d given" % len(commits))
+    if len(commits) == 2:
+        if opts.staged:
+            die("--staged is not allowed when two commits are given")
+        if not opts.diff:
+            die("--diff is required when two commits are given")
+    elif opts.diff_from_common_commit:
+        die("--diff_from_common_commit is only allowed when two commits are given")
+
+    if os.path.dirname(opts.binary):
+        opts.binary = os.path.abspath(opts.binary)
+
+    changed_lines = compute_diff_and_extract_lines(
+        commits, files, opts.staged, opts.diff_from_common_commit
+    )
+    if opts.verbose >= 1:
+        ignored_files = set(changed_lines)
+    filter_by_extension(changed_lines, opts.extensions.lower().split(","))
+    # The computed diff outputs absolute paths, so we must cd before accessing
+    # those files.
+    cd_to_toplevel()
+    filter_symlinks(changed_lines)
+    filter_ignored_files(changed_lines, binary=opts.binary)
+    if opts.verbose >= 1:
+        ignored_files.difference_update(changed_lines)
+        if ignored_files:
+            print(
+                "Ignoring the following files (wrong extension, symlink, or "
+                "ignored by clang-format):"
+            )
+            for filename in ignored_files:
+                print("    %s" % filename)
+        if changed_lines:
+            print("Running clang-format on the following files:")
+            for filename in changed_lines:
+                print("    %s" % filename)
+
+    if not changed_lines:
+        if opts.verbose >= 0:
+            print("no modified files to format")
+        return 0
+
+    if len(commits) > 1:
+        old_tree = commits[1]
+        revision = old_tree
+    elif opts.staged:
+        old_tree = create_tree_from_index(changed_lines)
+        revision = ""
+    else:
+        old_tree = create_tree_from_workdir(changed_lines)
+        revision = None
+    new_tree = run_clang_format_and_save_to_tree(
+        changed_lines, revision, binary=opts.binary, style=opts.style
+    )
+    if opts.verbose >= 1:
+        print("old tree: %s" % old_tree)
+        print("new tree: %s" % new_tree)
+
+    if old_tree == new_tree:
+        if opts.verbose >= 0:
+            print("clang-format did not modify any files")
+        return 0
+
+    if opts.diff:
+        return print_diff(old_tree, new_tree)
+    if opts.diffstat:
+        return print_diffstat(old_tree, new_tree)
+
+    changed_files = apply_changes(
+        old_tree, new_tree, force=opts.force, patch_mode=opts.patch
+    )
+    if (opts.verbose >= 0 and not opts.patch) or opts.verbose >= 1:
+        print("changed files:")
+        for filename in changed_files:
+            print("    %s" % filename)
+
+    return 1
+
+
+def load_git_config(non_string_options=None):
+    """Return the git configuration as a dictionary.
+
+    All options are assumed to be strings unless in `non_string_options`, in
+    which is a dictionary mapping option name (in lower case) to either "--bool"
+    or "--int"."""
+    if non_string_options is None:
+        non_string_options = {}
+    out = {}
+    for entry in run("git", "config", "--list", "--null").split("\0"):
+        if entry:
+            if "\n" in entry:
+                name, value = entry.split("\n", 1)
+            else:
+                # A setting with no '=' ('\n' with --null) is implicitly 'true'
+                name = entry
+                value = "true"
+            if name in non_string_options:
+                value = run("git", "config", non_string_options[name], name)
+            out[name] = value
+    return out
+
+
+def interpret_args(args, dash_dash, default_commit):
+    """Interpret `args` as "[commits] [--] [files]" and return (commits, files).
+
+    It is assumed that "--" and everything that follows has been removed from
+    args and placed in `dash_dash`.
+
+    If "--" is present (i.e., `dash_dash` is non-empty), the arguments to its
+    left (if present) are taken as commits.  Otherwise, the arguments are
+    checked from left to right if they are commits or files.  If commits are not
+    given, a list with `default_commit` is used."""
+    if dash_dash:
+        if len(args) == 0:
+            commits = [default_commit]
+        else:
+            commits = args
+        for commit in commits:
+            object_type = get_object_type(commit)
+            if object_type not in ("commit", "tag"):
+                if object_type is None:
+                    die("'%s' is not a commit" % commit)
+                else:
+                    die(
+                        "'%s' is a %s, but a commit was expected"
+                        % (commit, object_type)
+                    )
+        files = dash_dash[1:]
+    elif args:
+        commits = []
+        while args:
+            if not disambiguate_revision(args[0]):
+                break
+            commits.append(args.pop(0))
+        if not commits:
+            commits = [default_commit]
+        files = args
+    else:
+        commits = [default_commit]
+        files = []
+    return commits, files
+
+
+def disambiguate_revision(value):
+    """Returns True if `value` is a revision, False if it is a file, or dies."""
+    # If `value` is ambiguous (neither a commit nor a file), the following
+    # command will die with an appropriate error message.
+    run("git", "rev-parse", value, verbose=False)
+    object_type = get_object_type(value)
+    if object_type is None:
+        return False
+    if object_type in ("commit", "tag"):
+        return True
+    die("`%s` is a %s, but a commit or filename was expected" % (value, object_type))
+
+
+def get_object_type(value):
+    """Returns a string description of an object's type, or None if it is not
+    a valid git object."""
+    cmd = ["git", "cat-file", "-t", value]
+    p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    stdout, stderr = p.communicate()
+    if p.returncode != 0:
+        return None
+    return convert_string(stdout.strip())
+
+
+def compute_diff_and_extract_lines(commits, files, staged, diff_common_commit):
+    """Calls compute_diff() followed by extract_lines()."""
+    diff_process = compute_diff(commits, files, staged, diff_common_commit)
+    changed_lines = extract_lines(diff_process.stdout)
+    diff_process.stdout.close()
+    diff_process.wait()
+    if diff_process.returncode != 0:
+        # Assume error was already printed to stderr.
+        sys.exit(2)
+    return changed_lines
+
+
+def compute_diff(commits, files, staged, diff_common_commit):
+    """Return a subprocess object producing the diff from `commits`.
+
+    The return value's `stdin` file object will produce a patch with the
+    differences between the working directory (or stage if --staged is used) and
+    the first commit if a single one was specified, or the difference between
+    both specified commits, filtered on `files` (if non-empty).
+    Zero context lines are used in the patch."""
+    git_tool = "diff-index"
+    extra_args = []
+    if len(commits) == 2:
+        git_tool = "diff-tree"
+        if diff_common_commit:
+            commits = [f"{commits[0]}...{commits[1]}"]
+    elif staged:
+        extra_args += ["--cached"]
+
+    cmd = ["git", git_tool, "-p", "-U0"] + extra_args + commits + ["--"]
+    cmd.extend(files)
+    p = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
+    p.stdin.close()
+    return p
+
+
+def extract_lines(patch_file):
+    """Extract the changed lines in `patch_file`.
+
+    The return value is a dictionary mapping filename to a list of (start_line,
+    line_count) pairs.
+
+    The input must have been produced with ``-U0``, meaning unidiff format with
+    zero lines of context.  The return value is a dict mapping filename to a
+    list of line `Range`s."""
+    matches = {}
+    for line in patch_file:
+        line = convert_string(line)
+        match = re.search(r"^\+\+\+\ [^/]+/(.*)", line)
+        if match:
+            filename = match.group(1).rstrip("\r\n\t")
+        match = re.search(r"^@@ -[0-9,]+ \+(\d+)(,(\d+))?", line)
+        if match:
+            start_line = int(match.group(1))
+            line_count = 1
+            if match.group(3):
+                line_count = int(match.group(3))
+            if line_count == 0:
+                line_count = 1
+            if start_line == 0:
+                continue
+            matches.setdefault(filename, []).append(Range(start_line, line_count))
+    return matches
+
+
+def filter_by_extension(dictionary, allowed_extensions):
+    """Delete every key in `dictionary` that doesn't have an allowed extension.
+
+    `allowed_extensions` must be a collection of lowercase file extensions,
+    excluding the period."""
+    allowed_extensions = frozenset(allowed_extensions)
+    for filename in list(dictionary.keys()):
+        base_ext = filename.rsplit(".", 1)
+        if len(base_ext) == 1 and "" in allowed_extensions:
+            continue
+        if len(base_ext) == 1 or base_ext[1].lower() not in allowed_extensions:
+            del dictionary[filename]
+
+
+def filter_symlinks(dictionary):
+    """Delete every key in `dictionary` that is a symlink."""
+    for filename in list(dictionary.keys()):
+        if os.path.islink(filename):
+            del dictionary[filename]
+
+
+def filter_ignored_files(dictionary, binary):
+    """Delete every key in `dictionary` that is ignored by clang-format."""
+    ignored_files = run(binary, "-list-ignored", *dictionary.keys())
+    if not ignored_files:
+        return
+    ignored_files = ignored_files.split("\n")
+    for filename in ignored_files:
+        del dictionary[filename]
+
+
+def cd_to_toplevel():
+    """Change to the top level of the git repository."""
+    toplevel = run("git", "rev-parse", "--show-toplevel")
+    os.chdir(toplevel)
+
+
+def create_tree_from_workdir(filenames):
+    """Create a new git tree with the given files from the working directory.
+
+    Returns the object ID (SHA-1) of the created tree."""
+    return create_tree(filenames, "--stdin")
+
+
+def create_tree_from_index(filenames):
+    # Copy the environment, because the files have to be read from the original
+    # index.
+    env = os.environ.copy()
+
+    def index_contents_generator():
+        for filename in filenames:
+            git_ls_files_cmd = [
+                "git",
+                "ls-files",
+                "--stage",
+                "-z",
+                "--",
+                filename,
+            ]
+            git_ls_files = subprocess.Popen(
+                git_ls_files_cmd,
+                env=env,
+                stdin=subprocess.PIPE,
+                stdout=subprocess.PIPE,
+            )
+            stdout = git_ls_files.communicate()[0]
+            yield convert_string(stdout.split(b"\0")[0])
+
+    return create_tree(index_contents_generator(), "--index-info")
+
+
+def run_clang_format_and_save_to_tree(
+    changed_lines, revision=None, binary="clang-format", style=None
+):
+    """Run clang-format on each file and save the result to a git tree.
+
+    Returns the object ID (SHA-1) of the created tree."""
+    # Copy the environment when formatting the files in the index, because the
+    # files have to be read from the original index.
+    env = os.environ.copy() if revision == "" else None
+
+    def iteritems(container):
+        try:
+            return container.iteritems()  # Python 2
+        except AttributeError:
+            return container.items()  # Python 3
+
+    def index_info_generator():
+        for filename, line_ranges in iteritems(changed_lines):
+            if revision is not None:
+                if len(revision) > 0:
+                    git_metadata_cmd = [
+                        "git",
+                        "ls-tree",
+                        "%s:%s" % (revision, os.path.dirname(filename)),
+                        os.path.basename(filename),
+                    ]
+                else:
+                    git_metadata_cmd = [
+                        "git",
+                        "ls-files",
+                        "--stage",
+                        "--",
+                        filename,
+                    ]
+                git_metadata = subprocess.Popen(
+                    git_metadata_cmd,
+                    env=env,
+                    stdin=subprocess.PIPE,
+                    stdout=subprocess.PIPE,
+                )
+                stdout = git_metadata.communicate()[0]
+                mode = oct(int(stdout.split()[0], 8))
+            else:
+                mode = oct(os.stat(filename).st_mode)
+            # Adjust python3 octal format so that it matches what git expects
+            if mode.startswith("0o"):
+                mode = "0" + mode[2:]
+            blob_id = clang_format_to_blob(
+                filename,
+                line_ranges,
+                revision=revision,
+                binary=binary,
+                style=style,
+                env=env,
+            )
+            yield "%s %s\t%s" % (mode, blob_id, filename)
+
+    return create_tree(index_info_generator(), "--index-info")
+
+
+def create_tree(input_lines, mode):
+    """Create a tree object from the given input.
+
+    If mode is '--stdin', it must be a list of filenames.  If mode is
+    '--index-info' is must be a list of values suitable for "git update-index
+    --index-info", such as "<mode> <SP> <sha1> <TAB> <filename>".  Any other
+    mode is invalid."""
+    assert mode in ("--stdin", "--index-info")
+    cmd = ["git", "update-index", "--add", "-z", mode]
+    with temporary_index_file():
+        p = subprocess.Popen(cmd, stdin=subprocess.PIPE)
+        for line in input_lines:
+            p.stdin.write(to_bytes("%s\0" % line))
+        p.stdin.close()
+        if p.wait() != 0:
+            die("`%s` failed" % " ".join(cmd))
+        tree_id = run("git", "write-tree")
+        return tree_id
+
+
+def clang_format_to_blob(
+    filename,
+    line_ranges,
+    revision=None,
+    binary="clang-format",
+    style=None,
+    env=None,
+):
+    """Run clang-format on the given file and save the result to a git blob.
+
+    Runs on the file in `revision` if not None, or on the file in the working
+    directory if `revision` is None. Revision can be set to an empty string to
+    run clang-format on the file in the index.
+
+    Returns the object ID (SHA-1) of the created blob."""
+    clang_format_cmd = [binary]
+    if style:
+        clang_format_cmd.extend(["--style=" + style])
+    clang_format_cmd.extend(
+        [
+            "--lines=%s:%s" % (start_line, start_line + line_count - 1)
+            for start_line, line_count in line_ranges
+        ]
+    )
+    if revision is not None:
+        clang_format_cmd.extend(["--assume-filename=" + filename])
+        git_show_cmd = [
+            "git",
+            "cat-file",
+            "blob",
+            "%s:%s" % (revision, filename),
+        ]
+        git_show = subprocess.Popen(
+            git_show_cmd, env=env, stdin=subprocess.PIPE, stdout=subprocess.PIPE
+        )
+        git_show.stdin.close()
+        clang_format_stdin = git_show.stdout
+    else:
+        clang_format_cmd.extend([filename])
+        git_show = None
+        clang_format_stdin = subprocess.PIPE
+    try:
+        clang_format = subprocess.Popen(
+            clang_format_cmd, stdin=clang_format_stdin, stdout=subprocess.PIPE
+        )
+        if clang_format_stdin == subprocess.PIPE:
+            clang_format_stdin = clang_format.stdin
+    except OSError as e:
+        if e.errno == errno.ENOENT:
+            die('cannot find executable "%s"' % binary)
+        else:
+            raise
+    clang_format_stdin.close()
+    hash_object_cmd = [
+        "git",
+        "hash-object",
+        "-w",
+        "--path=" + filename,
+        "--stdin",
+    ]
+    hash_object = subprocess.Popen(
+        hash_object_cmd, stdin=clang_format.stdout, stdout=subprocess.PIPE
+    )
+    clang_format.stdout.close()
+    stdout = hash_object.communicate()[0]
+    if hash_object.returncode != 0:
+        die("`%s` failed" % " ".join(hash_object_cmd))
+    if clang_format.wait() != 0:
+        die("`%s` failed" % " ".join(clang_format_cmd))
+    if git_show and git_show.wait() != 0:
+        die("`%s` failed" % " ".join(git_show_cmd))
+    return convert_string(stdout).rstrip("\r\n")
+
+
+@contextlib.contextmanager
+def temporary_index_file(tree=None):
+    """Context manager for setting GIT_INDEX_FILE to a temporary file and
+    deleting the file afterward."""
+    index_path = create_temporary_index(tree)
+    old_index_path = os.environ.get("GIT_INDEX_FILE")
+    os.environ["GIT_INDEX_FILE"] = index_path
+    try:
+        yield
+    finally:
+        if old_index_path is None:
+            del os.environ["GIT_INDEX_FILE"]
+        else:
+            os.environ["GIT_INDEX_FILE"] = old_index_path
+        os.remove(index_path)
+
+
+def create_temporary_index(tree=None):
+    """Create a temporary index file and return the created file's path.
+
+    If `tree` is not None, use that as the tree to read in.  Otherwise, an
+    empty index is created."""
+    gitdir = run("git", "rev-parse", "--git-dir")
+    path = os.path.join(gitdir, temp_index_basename)
+    if tree is None:
+        tree = "--empty"
+    run("git", "read-tree", "--index-output=" + path, tree)
+    return path
+
+
+def print_diff(old_tree, new_tree):
+    """Print the diff between the two trees to stdout."""
+    # We use the porcelain 'diff' and not plumbing 'diff-tree' because the
+    # output is expected to be viewed by the user, and only the former does nice
+    # things like color and pagination.
+    #
+    # We also only print modified files since `new_tree` only contains the files
+    # that were modified, so unmodified files would show as deleted without the
+    # filter.
+    return subprocess.run(
+        ["git", "diff", "--diff-filter=M", "--exit-code", old_tree, new_tree]
+    ).returncode
+
+
+def print_diffstat(old_tree, new_tree):
+    """Print the diffstat between the two trees to stdout."""
+    # We use the porcelain 'diff' and not plumbing 'diff-tree' because the
+    # output is expected to be viewed by the user, and only the former does nice
+    # things like color and pagination.
+    #
+    # We also only print modified files since `new_tree` only contains the files
+    # that were modified, so unmodified files would show as deleted without the
+    # filter.
+    return subprocess.run(
+        [
+            "git",
+            "diff",
+            "--diff-filter=M",
+            "--exit-code",
+            "--stat",
+            old_tree,
+            new_tree,
+        ]
+    ).returncode
+
+
+def apply_changes(old_tree, new_tree, force=False, patch_mode=False):
+    """Apply the changes in `new_tree` to the working directory.
+
+    Bails if there are local changes in those files and not `force`.  If
+    `patch_mode`, runs `git checkout --patch` to select hunks interactively."""
+    changed_files = (
+        run(
+            "git",
+            "diff-tree",
+            "--diff-filter=M",
+            "-r",
+            "-z",
+            "--name-only",
+            old_tree,
+            new_tree,
+        )
+        .rstrip("\0")
+        .split("\0")
+    )
+    if not force:
+        unstaged_files = run("git", "diff-files", "--name-status", *changed_files)
+        if unstaged_files:
+            print(
+                "The following files would be modified but have unstaged changes:",
+                file=sys.stderr,
+            )
+            print(unstaged_files, file=sys.stderr)
+            print("Please commit, stage, or stash them first.", file=sys.stderr)
+            sys.exit(2)
+    if patch_mode:
+        # In patch mode, we could just as well create an index from the new tree
+        # and checkout from that, but then the user will be presented with a
+        # message saying "Discard ... from worktree".  Instead, we use the old
+        # tree as the index and checkout from new_tree, which gives the slightly
+        # better message, "Apply ... to index and worktree".  This is not quite
+        # right, since it won't be applied to the user's index, but oh well.
+        with temporary_index_file(old_tree):
+            subprocess.run(["git", "checkout", "--patch", new_tree], check=True)
+        index_tree = old_tree
+    else:
+        with temporary_index_file(new_tree):
+            run("git", "checkout-index", "-f", "--", *changed_files)
+    return changed_files
+
+
+def run(*args, **kwargs):
+    stdin = kwargs.pop("stdin", "")
+    verbose = kwargs.pop("verbose", True)
+    strip = kwargs.pop("strip", True)
+    for name in kwargs:
+        raise TypeError("run() got an unexpected keyword argument '%s'" % name)
+    p = subprocess.Popen(
+        args,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        stdin=subprocess.PIPE,
+    )
+    stdout, stderr = p.communicate(input=stdin)
+
+    stdout = convert_string(stdout)
+    stderr = convert_string(stderr)
+
+    if p.returncode == 0:
+        if stderr:
+            if verbose:
+                print("`%s` printed to stderr:" % " ".join(args), file=sys.stderr)
+            print(stderr.rstrip(), file=sys.stderr)
+        if strip:
+            stdout = stdout.rstrip("\r\n")
+        return stdout
+    if verbose:
+        print("`%s` returned %s" % (" ".join(args), p.returncode), file=sys.stderr)
+    if stderr:
+        print(stderr.rstrip(), file=sys.stderr)
+    sys.exit(2)
+
+
+def die(message):
+    print("error:", message, file=sys.stderr)
+    sys.exit(2)
+
+
+def to_bytes(str_input):
+    # Encode to UTF-8 to get binary data.
+    if isinstance(str_input, bytes):
+        return str_input
+    return str_input.encode("utf-8")
+
+
+def to_string(bytes_input):
+    if isinstance(bytes_input, str):
+        return bytes_input
+    return bytes_input.encode("utf-8")
+
+
+def convert_string(bytes_input):
+    try:
+        return to_string(bytes_input.decode("utf-8"))
+    except AttributeError:  # 'str' object has no attribute 'decode'.
+        return str(bytes_input)
+    except UnicodeError:
+        return str(bytes_input)
+
+
+if __name__ == "__main__":
+    sys.exit(main())

frontend/src/common/prettier/plugins/clang/index.ts

@@ -0,0 +1,155 @@
+/**
+ * Prettier Plugin for C/C++ formatting using clang-format WebAssembly
+ * 
+ * This plugin provides support for formatting C/C++ files using the clang-format WASM implementation.
+ * It supports various C/C++ file extensions and common clang-format styles.
+ */
+import type { Plugin, Parser, Printer } from 'prettier';
+
+// Import the clang-format WASM module
+import clangFormatInit, { format } from './clang-format-vite.js';
+
+const parserName = 'clang';
+
+// Language configuration
+const languages = [
+    {
+        name: 'C',
+        aliases: ['c'],
+        parsers: [parserName],
+        extensions: ['.c', '.h'],
+        aceMode: 'c_cpp',
+        tmScope: 'source.c',
+        linguistLanguageId: 50,
+        vscodeLanguageIds: ['c']
+    },
+    {
+        name: 'C++',
+        aliases: ['cpp', 'cxx', 'cc'],
+        parsers: [parserName],
+        extensions: ['.cpp', '.cxx', '.cc', '.hpp', '.hxx', '.hh', '.C', '.H'],
+        aceMode: 'c_cpp',
+        tmScope: 'source.cpp',
+        linguistLanguageId: 43,
+        vscodeLanguageIds: ['cpp']
+    },
+    {
+        name: 'Objective-C',
+        aliases: ['objc', 'objectivec'],
+        parsers: [parserName],
+        extensions: ['.m', '.mm'],
+        aceMode: 'objectivec',
+        tmScope: 'source.objc',
+        linguistLanguageId: 259,
+        vscodeLanguageIds: ['objective-c']
+    }
+];
+
+// Parser configuration
+const clangParser: Parser<string> = {
+    astFormat: parserName,
+    parse: (text: string) => text,
+    locStart: () => 0,
+    locEnd: (node: string) => node.length,
+};
+
+// Initialize clang-format WASM module
+let initPromise: Promise<void> | null = null;
+let isInitialized = false;
+
+function initClangFormat(): Promise<void> {
+    if (initPromise) {
+        return initPromise;
+    }
+    
+    initPromise = (async () => {
+        if (!isInitialized) {
+            await clangFormatInit();
+            isInitialized = true;
+        }
+    })();
+    
+    return initPromise;
+}
+
+// Printer configuration
+const clangPrinter: Printer<string> = {
+    print: (path, options) => {
+        try {
+            if (!isInitialized) {
+                console.warn('clang-format WASM module not initialized, returning original text');
+                return (path as any).getValue ? (path as any).getValue() : path.node;
+            }
+            
+            const text = (path as any).getValue ? (path as any).getValue() : path.node;
+            const style = getClangStyle(options);
+            
+            // Format using clang-format (synchronous call)
+            const formatted = format(text, undefined, style);
+            
+            return formatted.trim();
+        } catch (error) {
+            console.warn('clang-format failed:', error);
+            // Return original text if formatting fails
+            return (path as any).getValue ? (path as any).getValue() : path.node;
+        }
+    },
+};
+
+
+// Helper function to determine clang-format style
+function getClangStyle(options: any): string {
+    // You can extend this to support more options
+    const style = options.clangStyle || 'LLVM';
+    
+    // Support common styles
+    const validStyles = ['LLVM', 'Google', 'Chromium', 'Mozilla', 'WebKit', 'Microsoft', 'GNU'];
+    if (validStyles.includes(style)) {
+        return style;
+    }
+    
+    // Default to LLVM style
+    return 'LLVM';
+}
+
+// Plugin options
+const options = {
+    clangStyle: {
+        since: '0.0.1',
+        category: 'Format' as const,
+        type: 'choice' as const,
+        default: 'LLVM',
+        description: 'The clang-format style to use',
+        choices: [
+            { value: 'LLVM', description: 'LLVM coding standards' },
+            { value: 'Google', description: "Google's C++ style guide" },
+            { value: 'Chromium', description: "Chromium's style guide" },
+            { value: 'Mozilla', description: "Mozilla's style guide" },
+            { value: 'WebKit', description: "WebKit's style guide" },
+            { value: 'Microsoft', description: "Microsoft's style guide" },
+            { value: 'GNU', description: 'GNU coding standards' }
+        ]
+    }
+};
+
+// Plugin object
+const clangPlugin: Plugin = {
+    languages,
+    parsers: {
+        [parserName]: clangParser,
+    },
+    printers: {
+        [parserName]: clangPrinter,
+    },
+    options,
+};
+
+// Initialize WASM module when plugin loads
+initClangFormat().catch(error => {
+    console.warn('Failed to initialize clang-format WASM module:', error);
+});
+
+export default clangPlugin;
+export { languages };
+export const parsers = clangPlugin.parsers;
+export const printers = clangPlugin.printers;

frontend/src/common/prettier/plugins/clang/lib.cc

@@ -0,0 +1,323 @@
+//===-- clang-format/ClangFormat.cpp - Clang format tool ------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file implements a clang-format tool that automatically formats
+/// (fragments of) C++ code.
+///
+//===----------------------------------------------------------------------===//
+
+#include "lib.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Basic/Version.h"
+#include "clang/Format/Format.h"
+#include "clang/Rewrite/Core/Rewriter.h"
+
+using namespace llvm;
+using clang::tooling::Replacements;
+
+static std::string FallbackStyle{clang::format::DefaultFallbackStyle};
+
+static unsigned Cursor{0};
+
+static bool SortIncludes{false};
+
+static std::string QualifierAlignment{""};
+
+static auto Ok(const std::string content) -> Result {
+  return {false, std::move(content)};
+}
+
+static auto Err(const std::string content) -> Result {
+  return {true, std::move(content)};
+}
+
+namespace clang {
+namespace format {
+
+static FileID createInMemoryFile(StringRef FileName, MemoryBufferRef Source,
+                                 SourceManager &Sources, FileManager &Files,
+                                 llvm::vfs::InMemoryFileSystem *MemFS) {
+  MemFS->addFileNoOwn(FileName, 0, Source);
+  auto File = Files.getOptionalFileRef(FileName);
+  assert(File && "File not added to MemFS?");
+  return Sources.createFileID(*File, SourceLocation(), SrcMgr::C_User);
+}
+
+static auto fillRanges(MemoryBuffer *Code, std::vector<tooling::Range> &Ranges)
+    -> void {
+  Ranges.push_back(tooling::Range(0, Code->getBuffer().size()));
+}
+
+static auto isPredefinedStyle(StringRef style) -> bool {
+  return StringSwitch<bool>(style.lower())
+      .Cases("llvm", "chromium", "mozilla", "google", "webkit", "gnu",
+             "microsoft", "none", "file", true)
+      .Default(false);
+}
+
+static auto format_range(const std::unique_ptr<llvm::MemoryBuffer> code,
+                         const std::string assumedFileName,
+                         const std::string style,
+                         std::vector<tooling::Range> ranges) -> Result {
+  StringRef BufStr = code->getBuffer();
+
+  const char *InvalidBOM = SrcMgr::ContentCache::getInvalidBOM(BufStr);
+
+  if (InvalidBOM) {
+    std::stringstream err;
+    err << "encoding with unsupported byte order mark \"" << InvalidBOM
+        << "\" detected.";
+
+    return Err(err.str());
+  }
+
+  StringRef AssumedFileName = assumedFileName;
+  if (AssumedFileName.empty())
+    AssumedFileName = "<stdin>";
+
+  IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> InMemoryFileSystem(
+      new llvm::vfs::InMemoryFileSystem);
+  FileManager Files(FileSystemOptions(), InMemoryFileSystem);
+
+  DiagnosticOptions DiagOpts;
+  DiagnosticsEngine Diagnostics(
+      IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs), DiagOpts);
+  SourceManager Sources(Diagnostics, Files);
+
+  StringRef _style = style;
+
+  if (!_style.starts_with("{") && !isPredefinedStyle(_style)) {
+    std::unique_ptr<llvm::MemoryBuffer> DotClangFormat =
+        MemoryBuffer::getMemBuffer(style);
+
+    createInMemoryFile(".clang-format", *DotClangFormat.get(), Sources, Files,
+                       InMemoryFileSystem.get());
+    _style = "file:.clang-format";
+  }
+
+  llvm::Expected<FormatStyle> FormatStyle =
+      getStyle(_style, AssumedFileName, FallbackStyle, code->getBuffer(),
+               InMemoryFileSystem.get(), false);
+
+  InMemoryFileSystem.reset();
+
+  if (!FormatStyle) {
+    std::string err = llvm::toString(FormatStyle.takeError());
+    return Err(err);
+  }
+
+  StringRef QualifierAlignmentOrder = QualifierAlignment;
+
+  FormatStyle->QualifierAlignment =
+      StringSwitch<FormatStyle::QualifierAlignmentStyle>(
+          QualifierAlignmentOrder.lower())
+          .Case("right", FormatStyle::QAS_Right)
+          .Case("left", FormatStyle::QAS_Left)
+          .Default(FormatStyle->QualifierAlignment);
+
+  if (FormatStyle->QualifierAlignment == FormatStyle::QAS_Left) {
+    FormatStyle->QualifierOrder = {"const", "volatile", "type"};
+  } else if (FormatStyle->QualifierAlignment == FormatStyle::QAS_Right) {
+    FormatStyle->QualifierOrder = {"type", "const", "volatile"};
+  } else if (QualifierAlignmentOrder.contains("type")) {
+    FormatStyle->QualifierAlignment = FormatStyle::QAS_Custom;
+    SmallVector<StringRef> Qualifiers;
+    QualifierAlignmentOrder.split(Qualifiers, " ", /*MaxSplit=*/-1,
+                                  /*KeepEmpty=*/false);
+    FormatStyle->QualifierOrder = {Qualifiers.begin(), Qualifiers.end()};
+  }
+
+  if (SortIncludes) {
+    FormatStyle->SortIncludes = {};
+    FormatStyle->SortIncludes.Enabled = true;
+  }
+
+  unsigned CursorPosition = Cursor;
+  Replacements Replaces = sortIncludes(*FormatStyle, code->getBuffer(), ranges,
+                                       AssumedFileName, &CursorPosition);
+
+  // To format JSON insert a variable to trick the code into thinking its
+  // JavaScript.
+  if (FormatStyle->isJson() && !FormatStyle->DisableFormat) {
+    auto err =
+        Replaces.add(tooling::Replacement(AssumedFileName, 0, 0, "x = "));
+    if (err)
+      return Err("Bad Json variable insertion");
+  }
+
+  auto ChangedCode =
+      cantFail(tooling::applyAllReplacements(code->getBuffer(), Replaces));
+
+  // Get new affected ranges after sorting `#includes`.
+  ranges = tooling::calculateRangesAfterReplacements(Replaces, ranges);
+  FormattingAttemptStatus Status;
+  Replacements FormatChanges =
+      reformat(*FormatStyle, ChangedCode, ranges, AssumedFileName, &Status);
+  Replaces = Replaces.merge(FormatChanges);
+
+  return Ok(
+      cantFail(tooling::applyAllReplacements(code->getBuffer(), Replaces)));
+}
+
+static auto format_range(const std::string str,
+                         const std::string assumedFileName,
+                         const std::string style, const bool is_line_range,
+                         const std::vector<unsigned> ranges) -> Result {
+  ErrorOr<std::unique_ptr<MemoryBuffer>> CodeOrErr =
+      MemoryBuffer::getMemBuffer(str);
+
+  if (std::error_code EC = CodeOrErr.getError())
+    return Err(EC.message());
+  std::unique_ptr<llvm::MemoryBuffer> Code = std::move(CodeOrErr.get());
+  if (Code->getBufferSize() == 0)
+    return Ok(""); // Empty files are formatted correctly.
+
+  std::vector<tooling::Range> Ranges;
+
+  if (ranges.empty()) {
+    fillRanges(Code.get(), Ranges);
+    return format_range(std::move(Code), assumedFileName, style,
+                        std::move(Ranges));
+  }
+
+  IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> InMemoryFileSystem(
+      new llvm::vfs::InMemoryFileSystem);
+  FileManager Files(FileSystemOptions(), InMemoryFileSystem);
+  DiagnosticOptions DiagOpts;
+  DiagnosticsEngine Diagnostics(
+      IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs), DiagOpts);
+  SourceManager Sources(Diagnostics, Files);
+  FileID ID = createInMemoryFile("<irrelevant>", *Code, Sources, Files,
+                                 InMemoryFileSystem.get());
+
+  if (is_line_range) {
+    for (auto FromLine = begin(ranges); FromLine < end(ranges); FromLine += 2) {
+      auto ToLine = FromLine + 1;
+
+      SourceLocation Start = Sources.translateLineCol(ID, *FromLine, 1);
+      SourceLocation End = Sources.translateLineCol(ID, *ToLine, UINT_MAX);
+      if (Start.isInvalid() || End.isInvalid())
+        return Err("invalid line number");
+      unsigned Offset = Sources.getFileOffset(Start);
+      unsigned Length = Sources.getFileOffset(End) - Offset;
+      Ranges.push_back(tooling::Range(Offset, Length));
+    }
+  } else {
+    if (ranges.size() > 2 && ranges.size() % 2 != 0)
+      return Err("number of -offset and -length arguments must match");
+
+    if (ranges.size() == 1) {
+      auto offset = begin(ranges);
+      if (*offset >= Code->getBufferSize()) {
+        std::stringstream err;
+        err << "offset " << *offset << " is outside the file";
+        return Err(err.str());
+      }
+      SourceLocation Start =
+          Sources.getLocForStartOfFile(ID).getLocWithOffset(*offset);
+      SourceLocation End = Sources.getLocForEndOfFile(ID);
+
+      unsigned Offset = Sources.getFileOffset(Start);
+      unsigned Length = Sources.getFileOffset(End) - Offset;
+
+      Ranges.push_back(tooling::Range(Offset, Length));
+    } else {
+      for (auto offset = begin(ranges); offset < end(ranges); offset += 2) {
+        auto length = offset + 1;
+
+        if (*offset >= Code->getBufferSize()) {
+          std::stringstream err;
+          err << "offset " << *offset << " is outside the file";
+          return Err(err.str());
+        }
+
+        unsigned end = *offset + *length;
+        if (end > Code->getBufferSize()) {
+          std::stringstream err;
+          err << "invalid length " << *length << ", offset + length (" << end
+              << ") is outside the file.";
+          return Err(err.str());
+        }
+
+        SourceLocation Start =
+            Sources.getLocForStartOfFile(ID).getLocWithOffset(*offset);
+        SourceLocation End = Start.getLocWithOffset(*length);
+
+        unsigned Offset = Sources.getFileOffset(Start);
+        unsigned Length = Sources.getFileOffset(End) - Offset;
+
+        Ranges.push_back(tooling::Range(Offset, Length));
+      }
+    }
+  }
+
+  return format_range(std::move(Code), assumedFileName, style,
+                      std::move(Ranges));
+}
+
+static auto format(const std::string str, const std::string assumedFileName,
+                   const std::string style) -> Result {
+  ErrorOr<std::unique_ptr<MemoryBuffer>> CodeOrErr =
+      MemoryBuffer::getMemBuffer(str);
+
+  if (std::error_code EC = CodeOrErr.getError())
+    return Err(EC.message());
+  std::unique_ptr<llvm::MemoryBuffer> Code = std::move(CodeOrErr.get());
+  if (Code->getBufferSize() == 0)
+    return Ok(""); // Empty files are formatted correctly.
+
+  std::vector<tooling::Range> Ranges;
+  fillRanges(Code.get(), Ranges);
+
+  return format_range(std::move(Code), assumedFileName, style,
+                      std::move(Ranges));
+}
+
+} // namespace format
+} // namespace clang
+
+auto version() -> std::string {
+  return clang::getClangToolFullVersion("clang-format");
+}
+
+auto format(const std::string str, const std::string assumedFileName,
+            const std::string style) -> Result {
+  return clang::format::format(str, assumedFileName, style);
+}
+
+auto format_byte(const std::string str, const std::string assumedFileName,
+                 const std::string style, const std::vector<unsigned> ranges)
+    -> Result {
+  return clang::format::format_range(str, assumedFileName, style, false,
+                                     std::move(ranges));
+}
+
+auto format_line(const std::string str, const std::string assumedFileName,
+                 const std::string style, const std::vector<unsigned> ranges)
+    -> Result {
+  return clang::format::format_range(str, assumedFileName, style, true,
+                                     std::move(ranges));
+}
+
+auto set_fallback_style(const std::string style) -> void {
+  FallbackStyle = style;
+}
+
+auto set_sort_includes(const bool sort) -> void { SortIncludes = sort; }
+
+auto dump_config(const std::string style, const std::string FileName,
+                 const std::string code) -> Result {
+  llvm::Expected<clang::format::FormatStyle> FormatStyle =
+      clang::format::getStyle(style, FileName, FallbackStyle, code);
+  if (!FormatStyle)
+    return Err(llvm::toString(FormatStyle.takeError()));
+  std::string Config = clang::format::configurationAsText(*FormatStyle);
+  return Ok(Config);
+}

frontend/src/common/prettier/plugins/clang/lib.h

@@ -0,0 +1,24 @@
+#ifndef CLANG_FORMAT_WASM_LIB_H_
+#define CLANG_FORMAT_WASM_LIB_H_
+#include <sstream>
+
+struct Result {
+    bool error;
+    std::string content;
+};
+
+auto version() -> std::string;
+auto format(const std::string str, const std::string assumedFileName, const std::string style) -> Result;
+auto format_byte(const std::string str,
+                 const std::string assumedFileName,
+                 const std::string style,
+                 const std::vector<unsigned> ranges) -> Result;
+auto format_line(const std::string str,
+                 const std::string assumedFileName,
+                 const std::string style,
+                 const std::vector<unsigned> ranges) -> Result;
+auto set_fallback_style(const std::string style) -> void;
+auto set_sort_includes(const bool sort) -> void;
+auto dump_config(const std::string style, const std::string FileName, const std::string code) -> Result;
+
+#endif

frontend/src/common/prettier/plugins/clang/template.js

@@ -0,0 +1,146 @@
+/* @ts-self-types="./clang-format.d.ts" */
+async function load(module) {
+    if (typeof Response === "function" && module instanceof Response) {
+        if ("compileStreaming" in WebAssembly) {
+            try {
+                return await WebAssembly.compileStreaming(module);
+            } catch (e) {
+                if (module.headers.get("Content-Type") !== "application/wasm") {
+                    console.warn(
+                        "`WebAssembly.compileStreaming` failed because your server does not serve wasm with `application/wasm` MIME type. Falling back to `WebAssembly.instantiate` which is slower. Original error:\n",
+                        e,
+                    );
+                } else {
+                    throw e;
+                }
+            }
+        }
+
+        return module.arrayBuffer();
+    }
+
+    return module;
+}
+
+let wasm;
+export default async function initAsync(input) {
+    if (wasm !== undefined) {
+        return wasm;
+    }
+
+    if (typeof input === "undefined") {
+        input = new URL("clang-format.wasm", import.meta.url);
+    }
+
+    if (
+        typeof input === "string" ||
+        (typeof Request === "function" && input instanceof Request) ||
+        (typeof URL === "function" && input instanceof URL)
+    ) {
+        input = fetch(input);
+    }
+
+    wasm = await load(await input).then((wasm) => Module({ wasm }));
+    assert_init = () => {};
+}
+
+function assert_init() {
+    throw new Error("uninit");
+}
+
+export function version() {
+    assert_init();
+    return wasm.version();
+}
+
+export function set_fallback_style(style) {
+    assert_init();
+    wasm.set_fallback_style(style);
+}
+
+export function set_sort_includes(sort) {
+    assert_init();
+    wasm.set_sort_includes(sort);
+}
+
+function unwrap(result) {
+    const { error, content } = result;
+    if (error) {
+        throw Error(content);
+    }
+    return content;
+}
+
+export function format(content, filename = "<stdin>", style = "LLVM") {
+    assert_init();
+    const result = wasm.format(content, filename, style);
+    return unwrap(result);
+}
+
+export function format_line_range(
+    content,
+    range,
+    filename = "<stdin>",
+    style = "LLVM",
+) {
+    assert_init();
+    const rangeList = new wasm.RangeList();
+    for (const [fromLine, toLine] of range) {
+        if (fromLine < 1) {
+            throw Error("start line should be at least 1");
+        }
+        if (fromLine > toLine) {
+            throw Error("start line should not exceed end line");
+        }
+        rangeList.push_back(fromLine);
+        rangeList.push_back(toLine);
+    }
+
+    const result = wasm.format_line(content, filename, style, rangeList);
+    rangeList.delete();
+    return unwrap(result);
+}
+
+export function format_byte_range(
+    content,
+    range,
+    filename = "<stdin>",
+    style = "LLVM",
+) {
+    assert_init();
+    const rangeList = new wasm.RangeList();
+
+    if (range.length === 1 && range[0].length === 1) {
+        rangeList.push_back(range[0][0]);
+    } else {
+        for (const [offset, length] of range) {
+            if (offset < 0) {
+                throw Error("start offset should be at least 0");
+            }
+            if (length < 0) {
+                throw Error("length should be at least 0");
+            }
+            rangeList.push_back(offset);
+            rangeList.push_back(length);
+        }
+    }
+
+    const result = wasm.format_byte(content, filename, style, rangeList);
+    rangeList.delete();
+    return unwrap(result);
+}
+
+export function dump_config({
+    style = "file",
+    filename = "<stdin>",
+    code = "",
+} = {}) {
+    assert_init();
+    const result = wasm.dump_config(style, filename, code);
+    return unwrap(result);
+}
+
+export {
+    format_byte_range as formatByteRange,
+    format_line_range as formatLineRange,
+};

frontend/src/views/editor/extensions/codeblock/lang-parser/languages.ts

@@ -47,6 +47,7 @@ import tomlPrettierPlugin from "@/common/prettier/plugins/toml";
 import clojurePrettierPlugin from "@cospaia/prettier-plugin-clojure";
 import groovyPrettierPlugin from "@/common/prettier/plugins/groovy";
 import scalaPrettierPlugin from "@/common/prettier/plugins/scala";
+import clangPrettierPlugin from "@/common/prettier/plugins/clang";
 import * as prettierPluginEstree from "prettier/plugins/estree";
 
 /**
@@ -102,7 +103,10 @@ export const LANGUAGES: LanguageInfo[] = [
         parser: "xml",
         plugins: [xmlPrettierPlugin]
     }),
-    new LanguageInfo("cpp", "C++", cppLanguage.parser),
+    new LanguageInfo("cpp", "C++", cppLanguage.parser,{
+        parser: "clang",
+        plugins: [clangPrettierPlugin]
+    }),
     new LanguageInfo("rs", "Rust", rustLanguage.parser,{
         parser: "jinx-rust",
         plugins: [rustPrettierPlugin]