diff --git a/src/gn/starlark/vendor/README.md b/src/gn/starlark/vendor/README.md
new file mode 100644
index 0000000..bcc7896
--- /dev/null
+++ b/src/gn/starlark/vendor/README.md
@@ -0,0 +1,11 @@
+This directory currently contains a strict subset of the output of
+`cargo vendor`.
+
+The files were generated by running `cargo vendor`, and deleting all files we
+didn't want.
+
+Specifically, this is https://github.com/dtolnay/cxx/blob/1.0.194/include/cxx.h
+
+
+In the future, we will just vendor directly, but that adds ~60MB to the repo,
+so we will hold off on it for now.
diff --git a/src/gn/starlark/vendor/cxx/include/cxx.h b/src/gn/starlark/vendor/cxx/include/cxx.h
new file mode 100644
index 0000000..4e261a3
--- /dev/null
+++ b/src/gn/starlark/vendor/cxx/include/cxx.h
@@ -0,0 +1,1149 @@
+#pragma once
+#include <algorithm>
+#include <array>
+#include <cassert>
+#include <cstddef>
+#include <cstdint>
+#include <exception>
+#include <initializer_list>
+#include <iosfwd>
+#include <iterator>
+#include <new>
+#include <stdexcept>
+#include <string>
+#include <type_traits>
+#include <utility>
+#include <vector>
+#if defined(_WIN32)
+#include <basetsd.h>
+#else
+#include <sys/types.h>
+#endif
+
+#if __cplusplus >= 201703L
+#include <string_view>
+#endif
+
+#if __cplusplus >= 202002L
+#include <ranges>
+#endif
+
+namespace rust {
+inline namespace cxxbridge1 {
+
+struct unsafe_bitcopy_t;
+
+namespace {
+template <typename T>
+class impl;
+}
+
+#ifndef CXXBRIDGE1_RUST_STRING
+#define CXXBRIDGE1_RUST_STRING
+// https://cxx.rs/binding/string.html
+class String final {
+public:
+  String() noexcept;
+  String(const String &) noexcept;
+  String(String &&) noexcept;
+  ~String() noexcept;
+
+  String(const std::string &);
+  String(const char *);
+  String(const char *, std::size_t);
+  String(const char16_t *);
+  String(const char16_t *, std::size_t);
+#ifdef __cpp_char8_t
+  String(const char8_t *s);
+  String(const char8_t *s, std::size_t len);
+#endif
+
+  // Replace invalid Unicode data with the replacement character (U+FFFD).
+  static String lossy(const std::string &) noexcept;
+  static String lossy(const char *) noexcept;
+  static String lossy(const char *, std::size_t) noexcept;
+  static String lossy(const char16_t *) noexcept;
+  static String lossy(const char16_t *, std::size_t) noexcept;
+
+  String &operator=(const String &) & noexcept;
+  String &operator=(String &&) & noexcept;
+
+  explicit operator std::string() const;
+
+  // Note: no null terminator.
+  const char *data() const noexcept;
+  std::size_t size() const noexcept;
+  std::size_t length() const noexcept;
+  bool empty() const noexcept;
+
+  const char *c_str() noexcept;
+
+  std::size_t capacity() const noexcept;
+  void reserve(size_t new_cap) noexcept;
+
+  using iterator = char *;
+  iterator begin() noexcept;
+  iterator end() noexcept;
+
+  using const_iterator = const char *;
+  const_iterator begin() const noexcept;
+  const_iterator end() const noexcept;
+  const_iterator cbegin() const noexcept;
+  const_iterator cend() const noexcept;
+
+  bool operator==(const String &) const noexcept;
+  bool operator!=(const String &) const noexcept;
+  bool operator<(const String &) const noexcept;
+  bool operator<=(const String &) const noexcept;
+  bool operator>(const String &) const noexcept;
+  bool operator>=(const String &) const noexcept;
+
+  void swap(String &) noexcept;
+
+  // Internal API only intended for the cxxbridge code generator.
+  String(unsafe_bitcopy_t, const String &) noexcept;
+
+private:
+  struct lossy_t;
+  String(lossy_t, const char *, std::size_t) noexcept;
+  String(lossy_t, const char16_t *, std::size_t) noexcept;
+  friend void swap(String &lhs, String &rhs) noexcept { lhs.swap(rhs); }
+
+  // Size and alignment statically verified by rust_string.rs.
+  std::array<std::uintptr_t, 3> repr;
+};
+#endif // CXXBRIDGE1_RUST_STRING
+
+#ifndef CXXBRIDGE1_RUST_STR
+#define CXXBRIDGE1_RUST_STR
+// https://cxx.rs/binding/str.html
+class Str final {
+public:
+  Str() noexcept;
+  Str(const String &) noexcept;
+  Str(const std::string &);
+  Str(const char *);
+  Str(const char *, std::size_t);
+
+  Str &operator=(const Str &) & noexcept = default;
+
+  explicit operator std::string() const;
+#if __cplusplus >= 201703L
+  explicit operator std::string_view() const;
+#endif
+
+  // Note: no null terminator.
+  const char *data() const noexcept;
+  std::size_t size() const noexcept;
+  std::size_t length() const noexcept;
+  bool empty() const noexcept;
+
+  // Important in order for System V ABI to pass in registers.
+  Str(const Str &) noexcept = default;
+  ~Str() noexcept = default;
+
+  using iterator = const char *;
+  using const_iterator = const char *;
+  const_iterator begin() const noexcept;
+  const_iterator end() const noexcept;
+  const_iterator cbegin() const noexcept;
+  const_iterator cend() const noexcept;
+
+  bool operator==(const Str &) const noexcept;
+  bool operator!=(const Str &) const noexcept;
+  bool operator<(const Str &) const noexcept;
+  bool operator<=(const Str &) const noexcept;
+  bool operator>(const Str &) const noexcept;
+  bool operator>=(const Str &) const noexcept;
+
+  void swap(Str &) noexcept;
+
+private:
+  class uninit;
+  Str(uninit) noexcept;
+  friend impl<Str>;
+
+  std::array<std::uintptr_t, 2> repr;
+};
+#endif // CXXBRIDGE1_RUST_STR
+
+#ifndef CXXBRIDGE1_RUST_SLICE
+namespace detail {
+template <bool>
+struct copy_assignable_if {};
+
+template <>
+struct copy_assignable_if<false> {
+  copy_assignable_if() noexcept = default;
+  copy_assignable_if(const copy_assignable_if &) noexcept = default;
+  copy_assignable_if &operator=(const copy_assignable_if &) & noexcept = delete;
+  copy_assignable_if &operator=(copy_assignable_if &&) & noexcept = default;
+};
+} // namespace detail
+
+// https://cxx.rs/binding/slice.html
+template <typename T>
+class Slice final
+    : private detail::copy_assignable_if<std::is_const<T>::value> {
+public:
+  using value_type = T;
+
+  Slice() noexcept;
+  Slice(T *, std::size_t count) noexcept;
+
+  template <typename C>
+  explicit Slice(C &c) : Slice(c.data(), c.size()) {}
+
+  Slice &operator=(const Slice<T> &) & noexcept = default;
+  Slice &operator=(Slice<T> &&) & noexcept = default;
+
+  T *data() const noexcept;
+  std::size_t size() const noexcept;
+  std::size_t length() const noexcept;
+  bool empty() const noexcept;
+
+  T &operator[](std::size_t n) const noexcept;
+  T &at(std::size_t n) const;
+  T &front() const noexcept;
+  T &back() const noexcept;
+
+  // Important in order for System V ABI to pass in registers.
+  Slice(const Slice<T> &) noexcept = default;
+  ~Slice() noexcept = default;
+
+  class iterator;
+  iterator begin() const noexcept;
+  iterator end() const noexcept;
+
+  void swap(Slice &) noexcept;
+
+private:
+  class uninit;
+  Slice(uninit) noexcept;
+  friend impl<Slice>;
+  friend void sliceInit(void *, const void *, std::size_t) noexcept;
+  friend void *slicePtr(const void *) noexcept;
+  friend std::size_t sliceLen(const void *) noexcept;
+
+  std::array<std::uintptr_t, 2> repr;
+};
+
+#ifdef __cpp_deduction_guides
+template <typename C>
+explicit Slice(C &c)
+    -> Slice<std::remove_reference_t<decltype(*std::declval<C>().data())>>;
+#endif // __cpp_deduction_guides
+
+template <typename T>
+class Slice<T>::iterator final {
+public:
+#if __cplusplus >= 202002L
+  using iterator_category = std::contiguous_iterator_tag;
+#else
+  using iterator_category = std::random_access_iterator_tag;
+#endif
+  using value_type = T;
+  using difference_type = std::ptrdiff_t;
+  using pointer = typename std::add_pointer<T>::type;
+  using reference = typename std::add_lvalue_reference<T>::type;
+
+  reference operator*() const noexcept;
+  pointer operator->() const noexcept;
+  reference operator[](difference_type) const noexcept;
+
+  iterator &operator++() noexcept;
+  iterator operator++(int) noexcept;
+  iterator &operator--() noexcept;
+  iterator operator--(int) noexcept;
+
+  iterator &operator+=(difference_type) noexcept;
+  iterator &operator-=(difference_type) noexcept;
+  iterator operator+(difference_type) const noexcept;
+  friend inline iterator operator+(difference_type lhs, iterator rhs) noexcept {
+    return rhs + lhs;
+  }
+  iterator operator-(difference_type) const noexcept;
+  difference_type operator-(const iterator &) const noexcept;
+
+  bool operator==(const iterator &) const noexcept;
+  bool operator!=(const iterator &) const noexcept;
+  bool operator<(const iterator &) const noexcept;
+  bool operator<=(const iterator &) const noexcept;
+  bool operator>(const iterator &) const noexcept;
+  bool operator>=(const iterator &) const noexcept;
+
+private:
+  friend class Slice;
+  void *pos;
+  std::size_t stride;
+};
+
+#if __cplusplus >= 202002L
+static_assert(std::ranges::contiguous_range<rust::Slice<const uint8_t>>);
+static_assert(std::contiguous_iterator<rust::Slice<const uint8_t>::iterator>);
+#endif
+
+#endif // CXXBRIDGE1_RUST_SLICE
+
+#ifndef CXXBRIDGE1_RUST_BOX
+// https://cxx.rs/binding/box.html
+template <typename T>
+class Box final {
+public:
+  using element_type = T;
+  using const_pointer =
+      typename std::add_pointer<typename std::add_const<T>::type>::type;
+  using pointer = typename std::add_pointer<T>::type;
+
+  Box() = delete;
+  Box(Box &&) noexcept;
+  ~Box() noexcept;
+
+  explicit Box(const T &);
+  explicit Box(T &&);
+
+  Box &operator=(Box &&) & noexcept;
+
+  const T *operator->() const noexcept;
+  const T &operator*() const noexcept;
+  T *operator->() noexcept;
+  T &operator*() noexcept;
+
+  template <typename... Fields>
+  static Box in_place(Fields &&...);
+
+  void swap(Box &) noexcept;
+
+  // Important: requires that `raw` came from an into_raw call. Do not pass a
+  // pointer from `new` or any other source.
+  static Box from_raw(T *) noexcept;
+
+  T *into_raw() noexcept;
+
+  /* Deprecated */ using value_type = element_type;
+
+private:
+  class uninit;
+  class allocation;
+  Box(uninit) noexcept;
+  void drop() noexcept;
+
+  friend void swap(Box &lhs, Box &rhs) noexcept { lhs.swap(rhs); }
+
+  T *ptr;
+};
+#endif // CXXBRIDGE1_RUST_BOX
+
+#ifndef CXXBRIDGE1_RUST_VEC
+// https://cxx.rs/binding/vec.html
+template <typename T>
+class Vec final {
+public:
+  using value_type = T;
+
+  Vec() noexcept;
+  Vec(std::initializer_list<T>);
+  Vec(const Vec &);
+  Vec(Vec &&) noexcept;
+  ~Vec() noexcept;
+
+  Vec &operator=(Vec &&) & noexcept;
+  Vec &operator=(const Vec &) &;
+
+  std::size_t size() const noexcept;
+  bool empty() const noexcept;
+  const T *data() const noexcept;
+  T *data() noexcept;
+  std::size_t capacity() const noexcept;
+
+  const T &operator[](std::size_t n) const noexcept;
+  const T &at(std::size_t n) const;
+  const T &front() const noexcept;
+  const T &back() const noexcept;
+
+  T &operator[](std::size_t n) noexcept;
+  T &at(std::size_t n);
+  T &front() noexcept;
+  T &back() noexcept;
+
+  void reserve(std::size_t new_cap);
+  void push_back(const T &value);
+  void push_back(T &&value);
+  template <typename... Args>
+  void emplace_back(Args &&...args);
+  void truncate(std::size_t len);
+  void clear();
+
+  using iterator = typename Slice<T>::iterator;
+  iterator begin() noexcept;
+  iterator end() noexcept;
+
+  using const_iterator = typename Slice<const T>::iterator;
+  const_iterator begin() const noexcept;
+  const_iterator end() const noexcept;
+  const_iterator cbegin() const noexcept;
+  const_iterator cend() const noexcept;
+
+  void swap(Vec &) noexcept;
+
+  // Internal API only intended for the cxxbridge code generator.
+  Vec(unsafe_bitcopy_t, const Vec &) noexcept;
+
+private:
+  void reserve_total(std::size_t new_cap) noexcept;
+  void set_len(std::size_t len) noexcept;
+  void drop() noexcept;
+
+  friend void swap(Vec &lhs, Vec &rhs) noexcept { lhs.swap(rhs); }
+
+  // Size and alignment statically verified by rust_vec.rs.
+  std::array<std::uintptr_t, 3> repr;
+};
+#endif // CXXBRIDGE1_RUST_VEC
+
+#ifndef CXXBRIDGE1_RUST_FN
+// https://cxx.rs/binding/fn.html
+template <typename Signature>
+class Fn;
+
+template <typename Ret, typename... Args>
+class Fn<Ret(Args...)> final {
+public:
+  Ret operator()(Args... args) const noexcept;
+  Fn operator*() const noexcept;
+
+private:
+  Ret (*trampoline)(Args..., void *fn) noexcept;
+  void *fn;
+};
+#endif // CXXBRIDGE1_RUST_FN
+
+#ifndef CXXBRIDGE1_RUST_ERROR
+#define CXXBRIDGE1_RUST_ERROR
+// https://cxx.rs/binding/result.html
+class Error final : public std::exception {
+public:
+  Error(const Error &);
+  Error(Error &&) noexcept;
+  ~Error() noexcept override;
+
+  Error &operator=(const Error &) &;
+  Error &operator=(Error &&) & noexcept;
+
+  const char *what() const noexcept override;
+
+private:
+  Error() noexcept = default;
+  friend impl<Error>;
+  const char *msg;
+  std::size_t len;
+};
+#endif // CXXBRIDGE1_RUST_ERROR
+
+#ifndef CXXBRIDGE1_RUST_ISIZE
+#define CXXBRIDGE1_RUST_ISIZE
+#if defined(_WIN32)
+using isize = SSIZE_T;
+#else
+using isize = ssize_t;
+#endif
+#endif // CXXBRIDGE1_RUST_ISIZE
+
+std::ostream &operator<<(std::ostream &, const String &);
+std::ostream &operator<<(std::ostream &, const Str &);
+
+#ifndef CXXBRIDGE1_RUST_OPAQUE
+#define CXXBRIDGE1_RUST_OPAQUE
+// Base class of generated opaque Rust types.
+class Opaque {
+public:
+  Opaque() = delete;
+  Opaque(const Opaque &) = delete;
+  ~Opaque() = delete;
+};
+#endif // CXXBRIDGE1_RUST_OPAQUE
+
+template <typename T>
+std::size_t size_of();
+template <typename T>
+std::size_t align_of();
+
+// IsRelocatable<T> is used in assertions that a C++ type passed by value
+// between Rust and C++ is soundly relocatable by Rust.
+//
+// There may be legitimate reasons to opt out of the check for support of types
+// that the programmer knows are soundly Rust-movable despite not being
+// recognized as such by the C++ type system due to a move constructor or
+// destructor. To opt out of the relocatability check, do either of the
+// following things in any header used by `include!` in the bridge.
+//
+//      --- if you define the type:
+//      struct MyType {
+//        ...
+//    +   using IsRelocatable = std::true_type;
+//      };
+//
+//      --- otherwise:
+//    + template <>
+//    + struct rust::IsRelocatable<MyType> : std::true_type {};
+template <typename T>
+struct IsRelocatable;
+
+using u8 = std::uint8_t;
+using u16 = std::uint16_t;
+using u32 = std::uint32_t;
+using u64 = std::uint64_t;
+using usize = std::size_t; // see static asserts in cxx.cc
+using i8 = std::int8_t;
+using i16 = std::int16_t;
+using i32 = std::int32_t;
+using i64 = std::int64_t;
+using f32 = float;
+using f64 = double;
+
+// Snake case aliases for use in code that uses this style for type names.
+using string = String;
+using str = Str;
+template <typename T>
+using slice = Slice<T>;
+template <typename T>
+using box = Box<T>;
+template <typename T>
+using vec = Vec<T>;
+using error = Error;
+template <typename Signature>
+using fn = Fn<Signature>;
+template <typename T>
+using is_relocatable = IsRelocatable<T>;
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+/// end public API, begin implementation details
+
+#ifndef CXXBRIDGE1_PANIC
+#define CXXBRIDGE1_PANIC
+template <typename Exception>
+void panic [[noreturn]] (const char *msg);
+#endif // CXXBRIDGE1_PANIC
+
+#ifndef CXXBRIDGE1_RUST_FN
+#define CXXBRIDGE1_RUST_FN
+template <typename Ret, typename... Args>
+Ret Fn<Ret(Args...)>::operator()(Args... args) const noexcept {
+  return (*this->trampoline)(std::forward<Args>(args)..., this->fn);
+}
+
+template <typename Ret, typename... Args>
+Fn<Ret(Args...)> Fn<Ret(Args...)>::operator*() const noexcept {
+  return *this;
+}
+#endif // CXXBRIDGE1_RUST_FN
+
+#ifndef CXXBRIDGE1_RUST_BITCOPY_T
+#define CXXBRIDGE1_RUST_BITCOPY_T
+struct unsafe_bitcopy_t final {
+  explicit unsafe_bitcopy_t() = default;
+};
+#endif // CXXBRIDGE1_RUST_BITCOPY_T
+
+#ifndef CXXBRIDGE1_RUST_BITCOPY
+#define CXXBRIDGE1_RUST_BITCOPY
+constexpr unsafe_bitcopy_t unsafe_bitcopy{};
+#endif // CXXBRIDGE1_RUST_BITCOPY
+
+#ifndef CXXBRIDGE1_RUST_SLICE
+#define CXXBRIDGE1_RUST_SLICE
+template <typename T>
+Slice<T>::Slice() noexcept {
+  sliceInit(this, reinterpret_cast<void *>(align_of<T>()), 0);
+}
+
+template <typename T>
+Slice<T>::Slice(T *s, std::size_t count) noexcept {
+  assert(s != nullptr || count == 0);
+  sliceInit(this,
+            s == nullptr && count == 0
+                ? reinterpret_cast<void *>(align_of<T>())
+                : const_cast<typename std::remove_const<T>::type *>(s),
+            count);
+}
+
+template <typename T>
+T *Slice<T>::data() const noexcept {
+  return reinterpret_cast<T *>(slicePtr(this));
+}
+
+template <typename T>
+std::size_t Slice<T>::size() const noexcept {
+  return sliceLen(this);
+}
+
+template <typename T>
+std::size_t Slice<T>::length() const noexcept {
+  return this->size();
+}
+
+template <typename T>
+bool Slice<T>::empty() const noexcept {
+  return this->size() == 0;
+}
+
+template <typename T>
+T &Slice<T>::operator[](std::size_t n) const noexcept {
+  assert(n < this->size());
+  auto ptr = static_cast<char *>(slicePtr(this)) + size_of<T>() * n;
+  return *reinterpret_cast<T *>(ptr);
+}
+
+template <typename T>
+T &Slice<T>::at(std::size_t n) const {
+  if (n >= this->size()) {
+    panic<std::out_of_range>("rust::Slice index out of range");
+  }
+  return (*this)[n];
+}
+
+template <typename T>
+T &Slice<T>::front() const noexcept {
+  assert(!this->empty());
+  return (*this)[0];
+}
+
+template <typename T>
+T &Slice<T>::back() const noexcept {
+  assert(!this->empty());
+  return (*this)[this->size() - 1];
+}
+
+template <typename T>
+typename Slice<T>::iterator::reference
+Slice<T>::iterator::operator*() const noexcept {
+  return *static_cast<T *>(this->pos);
+}
+
+template <typename T>
+typename Slice<T>::iterator::pointer
+Slice<T>::iterator::operator->() const noexcept {
+  return static_cast<T *>(this->pos);
+}
+
+template <typename T>
+typename Slice<T>::iterator::reference Slice<T>::iterator::operator[](
+    typename Slice<T>::iterator::difference_type n) const noexcept {
+  auto ptr = static_cast<char *>(this->pos) + this->stride * n;
+  return *reinterpret_cast<T *>(ptr);
+}
+
+template <typename T>
+typename Slice<T>::iterator &Slice<T>::iterator::operator++() noexcept {
+  this->pos = static_cast<char *>(this->pos) + this->stride;
+  return *this;
+}
+
+template <typename T>
+typename Slice<T>::iterator Slice<T>::iterator::operator++(int) noexcept {
+  auto ret = iterator(*this);
+  this->pos = static_cast<char *>(this->pos) + this->stride;
+  return ret;
+}
+
+template <typename T>
+typename Slice<T>::iterator &Slice<T>::iterator::operator--() noexcept {
+  this->pos = static_cast<char *>(this->pos) - this->stride;
+  return *this;
+}
+
+template <typename T>
+typename Slice<T>::iterator Slice<T>::iterator::operator--(int) noexcept {
+  auto ret = iterator(*this);
+  this->pos = static_cast<char *>(this->pos) - this->stride;
+  return ret;
+}
+
+template <typename T>
+typename Slice<T>::iterator &Slice<T>::iterator::operator+=(
+    typename Slice<T>::iterator::difference_type n) noexcept {
+  this->pos = static_cast<char *>(this->pos) + this->stride * n;
+  return *this;
+}
+
+template <typename T>
+typename Slice<T>::iterator &Slice<T>::iterator::operator-=(
+    typename Slice<T>::iterator::difference_type n) noexcept {
+  this->pos = static_cast<char *>(this->pos) - this->stride * n;
+  return *this;
+}
+
+template <typename T>
+typename Slice<T>::iterator Slice<T>::iterator::operator+(
+    typename Slice<T>::iterator::difference_type n) const noexcept {
+  auto ret = iterator(*this);
+  ret.pos = static_cast<char *>(this->pos) + this->stride * n;
+  return ret;
+}
+
+template <typename T>
+typename Slice<T>::iterator Slice<T>::iterator::operator-(
+    typename Slice<T>::iterator::difference_type n) const noexcept {
+  auto ret = iterator(*this);
+  ret.pos = static_cast<char *>(this->pos) - this->stride * n;
+  return ret;
+}
+
+template <typename T>
+typename Slice<T>::iterator::difference_type
+Slice<T>::iterator::operator-(const iterator &other) const noexcept {
+  auto diff = std::distance(static_cast<char *>(other.pos),
+                            static_cast<char *>(this->pos));
+  return diff / static_cast<typename Slice<T>::iterator::difference_type>(
+                    this->stride);
+}
+
+template <typename T>
+bool Slice<T>::iterator::operator==(const iterator &other) const noexcept {
+  return this->pos == other.pos;
+}
+
+template <typename T>
+bool Slice<T>::iterator::operator!=(const iterator &other) const noexcept {
+  return this->pos != other.pos;
+}
+
+template <typename T>
+bool Slice<T>::iterator::operator<(const iterator &other) const noexcept {
+  return this->pos < other.pos;
+}
+
+template <typename T>
+bool Slice<T>::iterator::operator<=(const iterator &other) const noexcept {
+  return this->pos <= other.pos;
+}
+
+template <typename T>
+bool Slice<T>::iterator::operator>(const iterator &other) const noexcept {
+  return this->pos > other.pos;
+}
+
+template <typename T>
+bool Slice<T>::iterator::operator>=(const iterator &other) const noexcept {
+  return this->pos >= other.pos;
+}
+
+template <typename T>
+typename Slice<T>::iterator Slice<T>::begin() const noexcept {
+  iterator it;
+  it.pos = slicePtr(this);
+  it.stride = size_of<T>();
+  return it;
+}
+
+template <typename T>
+typename Slice<T>::iterator Slice<T>::end() const noexcept {
+  iterator it = this->begin();
+  it.pos = static_cast<char *>(it.pos) + it.stride * this->size();
+  return it;
+}
+
+template <typename T>
+void Slice<T>::swap(Slice &rhs) noexcept {
+  std::swap(*this, rhs);
+}
+#endif // CXXBRIDGE1_RUST_SLICE
+
+#ifndef CXXBRIDGE1_RUST_BOX
+#define CXXBRIDGE1_RUST_BOX
+template <typename T>
+class Box<T>::uninit {};
+
+template <typename T>
+class Box<T>::allocation {
+  static T *alloc() noexcept;
+  static void dealloc(T *) noexcept;
+
+public:
+  allocation() noexcept : ptr(alloc()) {}
+  ~allocation() noexcept {
+    if (this->ptr) {
+      dealloc(this->ptr);
+    }
+  }
+  T *ptr;
+};
+
+template <typename T>
+Box<T>::Box(Box &&other) noexcept : ptr(other.ptr) {
+  other.ptr = nullptr;
+}
+
+template <typename T>
+Box<T>::Box(const T &val) {
+  allocation alloc;
+  ::new (alloc.ptr) T(val);
+  this->ptr = alloc.ptr;
+  alloc.ptr = nullptr;
+}
+
+template <typename T>
+Box<T>::Box(T &&val) {
+  allocation alloc;
+  ::new (alloc.ptr) T(std::move(val));
+  this->ptr = alloc.ptr;
+  alloc.ptr = nullptr;
+}
+
+template <typename T>
+Box<T>::~Box() noexcept {
+  if (this->ptr) {
+    this->drop();
+  }
+}
+
+template <typename T>
+Box<T> &Box<T>::operator=(Box &&other) & noexcept {
+  if (this->ptr) {
+    this->drop();
+  }
+  this->ptr = other.ptr;
+  other.ptr = nullptr;
+  return *this;
+}
+
+template <typename T>
+const T *Box<T>::operator->() const noexcept {
+  return this->ptr;
+}
+
+template <typename T>
+const T &Box<T>::operator*() const noexcept {
+  return *this->ptr;
+}
+
+template <typename T>
+T *Box<T>::operator->() noexcept {
+  return this->ptr;
+}
+
+template <typename T>
+T &Box<T>::operator*() noexcept {
+  return *this->ptr;
+}
+
+template <typename T>
+template <typename... Fields>
+Box<T> Box<T>::in_place(Fields &&...fields) {
+  allocation alloc;
+  auto ptr = alloc.ptr;
+  ::new (ptr) T{std::forward<Fields>(fields)...};
+  alloc.ptr = nullptr;
+  return from_raw(ptr);
+}
+
+template <typename T>
+void Box<T>::swap(Box &rhs) noexcept {
+  using std::swap;
+  swap(this->ptr, rhs.ptr);
+}
+
+template <typename T>
+Box<T> Box<T>::from_raw(T *raw) noexcept {
+  Box box = uninit{};
+  box.ptr = raw;
+  return box;
+}
+
+template <typename T>
+T *Box<T>::into_raw() noexcept {
+  T *raw = this->ptr;
+  this->ptr = nullptr;
+  return raw;
+}
+
+template <typename T>
+Box<T>::Box(uninit) noexcept {}
+#endif // CXXBRIDGE1_RUST_BOX
+
+#ifndef CXXBRIDGE1_RUST_VEC
+#define CXXBRIDGE1_RUST_VEC
+template <typename T>
+Vec<T>::Vec(std::initializer_list<T> init) : Vec{} {
+  this->reserve_total(init.size());
+  std::move(init.begin(), init.end(), std::back_inserter(*this));
+}
+
+template <typename T>
+Vec<T>::Vec(const Vec &other) : Vec() {
+  this->reserve_total(other.size());
+  std::copy(other.begin(), other.end(), std::back_inserter(*this));
+}
+
+template <typename T>
+Vec<T>::Vec(Vec &&other) noexcept : repr(other.repr) {
+  new (&other) Vec();
+}
+
+template <typename T>
+Vec<T>::~Vec() noexcept {
+  this->drop();
+}
+
+template <typename T>
+Vec<T> &Vec<T>::operator=(Vec &&other) & noexcept {
+  this->drop();
+  this->repr = other.repr;
+  new (&other) Vec();
+  return *this;
+}
+
+template <typename T>
+Vec<T> &Vec<T>::operator=(const Vec &other) & {
+  if (this != &other) {
+    this->drop();
+    new (this) Vec(other);
+  }
+  return *this;
+}
+
+template <typename T>
+bool Vec<T>::empty() const noexcept {
+  return this->size() == 0;
+}
+
+template <typename T>
+T *Vec<T>::data() noexcept {
+  return const_cast<T *>(const_cast<const Vec<T> *>(this)->data());
+}
+
+template <typename T>
+const T &Vec<T>::operator[](std::size_t n) const noexcept {
+  assert(n < this->size());
+  auto data = reinterpret_cast<const char *>(this->data());
+  return *reinterpret_cast<const T *>(data + n * size_of<T>());
+}
+
+template <typename T>
+const T &Vec<T>::at(std::size_t n) const {
+  if (n >= this->size()) {
+    panic<std::out_of_range>("rust::Vec index out of range");
+  }
+  return (*this)[n];
+}
+
+template <typename T>
+const T &Vec<T>::front() const noexcept {
+  assert(!this->empty());
+  return (*this)[0];
+}
+
+template <typename T>
+const T &Vec<T>::back() const noexcept {
+  assert(!this->empty());
+  return (*this)[this->size() - 1];
+}
+
+template <typename T>
+T &Vec<T>::operator[](std::size_t n) noexcept {
+  assert(n < this->size());
+  auto data = reinterpret_cast<char *>(this->data());
+  return *reinterpret_cast<T *>(data + n * size_of<T>());
+}
+
+template <typename T>
+T &Vec<T>::at(std::size_t n) {
+  if (n >= this->size()) {
+    panic<std::out_of_range>("rust::Vec index out of range");
+  }
+  return (*this)[n];
+}
+
+template <typename T>
+T &Vec<T>::front() noexcept {
+  assert(!this->empty());
+  return (*this)[0];
+}
+
+template <typename T>
+T &Vec<T>::back() noexcept {
+  assert(!this->empty());
+  return (*this)[this->size() - 1];
+}
+
+template <typename T>
+void Vec<T>::reserve(std::size_t new_cap) {
+  this->reserve_total(new_cap);
+}
+
+template <typename T>
+void Vec<T>::push_back(const T &value) {
+  this->emplace_back(value);
+}
+
+template <typename T>
+void Vec<T>::push_back(T &&value) {
+  this->emplace_back(std::move(value));
+}
+
+template <typename T>
+template <typename... Args>
+void Vec<T>::emplace_back(Args &&...args) {
+  auto size = this->size();
+  this->reserve_total(size + 1);
+  ::new (reinterpret_cast<T *>(reinterpret_cast<char *>(this->data()) +
+                               size * size_of<T>()))
+      T(std::forward<Args>(args)...);
+  this->set_len(size + 1);
+}
+
+template <typename T>
+void Vec<T>::clear() {
+  this->truncate(0);
+}
+
+template <typename T>
+typename Vec<T>::iterator Vec<T>::begin() noexcept {
+  return Slice<T>(this->data(), this->size()).begin();
+}
+
+template <typename T>
+typename Vec<T>::iterator Vec<T>::end() noexcept {
+  return Slice<T>(this->data(), this->size()).end();
+}
+
+template <typename T>
+typename Vec<T>::const_iterator Vec<T>::begin() const noexcept {
+  return this->cbegin();
+}
+
+template <typename T>
+typename Vec<T>::const_iterator Vec<T>::end() const noexcept {
+  return this->cend();
+}
+
+template <typename T>
+typename Vec<T>::const_iterator Vec<T>::cbegin() const noexcept {
+  return Slice<const T>(this->data(), this->size()).begin();
+}
+
+template <typename T>
+typename Vec<T>::const_iterator Vec<T>::cend() const noexcept {
+  return Slice<const T>(this->data(), this->size()).end();
+}
+
+template <typename T>
+void Vec<T>::swap(Vec &rhs) noexcept {
+  using std::swap;
+  swap(this->repr, rhs.repr);
+}
+
+// Internal API only intended for the cxxbridge code generator.
+template <typename T>
+Vec<T>::Vec(unsafe_bitcopy_t, const Vec &bits) noexcept : repr(bits.repr) {}
+#endif // CXXBRIDGE1_RUST_VEC
+
+#ifndef CXXBRIDGE1_IS_COMPLETE
+#define CXXBRIDGE1_IS_COMPLETE
+namespace detail {
+namespace {
+template <typename T, typename = std::size_t>
+struct is_complete : std::false_type {};
+template <typename T>
+struct is_complete<T, decltype(sizeof(T))> : std::true_type {};
+} // namespace
+} // namespace detail
+#endif // CXXBRIDGE1_IS_COMPLETE
+
+#ifndef CXXBRIDGE1_LAYOUT
+#define CXXBRIDGE1_LAYOUT
+class layout {
+  template <typename T>
+  friend std::size_t size_of();
+  template <typename T>
+  friend std::size_t align_of();
+  template <typename T>
+  static typename std::enable_if<std::is_base_of<Opaque, T>::value,
+                                 std::size_t>::type
+  do_size_of() {
+    return T::layout::size();
+  }
+  template <typename T>
+  static typename std::enable_if<!std::is_base_of<Opaque, T>::value,
+                                 std::size_t>::type
+  do_size_of() {
+    return sizeof(T);
+  }
+  template <typename T>
+  static
+      typename std::enable_if<detail::is_complete<T>::value, std::size_t>::type
+      size_of() {
+    return do_size_of<T>();
+  }
+  template <typename T>
+  static typename std::enable_if<std::is_base_of<Opaque, T>::value,
+                                 std::size_t>::type
+  do_align_of() {
+    return T::layout::align();
+  }
+  template <typename T>
+  static typename std::enable_if<!std::is_base_of<Opaque, T>::value,
+                                 std::size_t>::type
+  do_align_of() {
+    return alignof(T);
+  }
+  template <typename T>
+  static
+      typename std::enable_if<detail::is_complete<T>::value, std::size_t>::type
+      align_of() {
+    return do_align_of<T>();
+  }
+};
+
+template <typename T>
+std::size_t size_of() {
+  return layout::size_of<T>();
+}
+
+template <typename T>
+std::size_t align_of() {
+  return layout::align_of<T>();
+}
+#endif // CXXBRIDGE1_LAYOUT
+
+#ifndef CXXBRIDGE1_RELOCATABLE
+#define CXXBRIDGE1_RELOCATABLE
+namespace detail {
+template <typename... Ts>
+struct make_void {
+  using type = void;
+};
+
+template <typename... Ts>
+using void_t = typename make_void<Ts...>::type;
+
+template <typename Void, template <typename...> class, typename...>
+struct detect : std::false_type {};
+template <template <typename...> class T, typename... A>
+struct detect<void_t<T<A...>>, T, A...> : std::true_type {};
+
+template <template <typename...> class T, typename... A>
+using is_detected = detect<void, T, A...>;
+
+template <typename T>
+using detect_IsRelocatable = typename T::IsRelocatable;
+
+template <typename T>
+struct get_IsRelocatable
+    : std::is_same<typename T::IsRelocatable, std::true_type> {};
+} // namespace detail
+
+template <typename T>
+struct IsRelocatable
+    : std::conditional<
+          detail::is_detected<detail::detect_IsRelocatable, T>::value,
+          detail::get_IsRelocatable<T>,
+          std::integral_constant<
+              bool, std::is_trivially_move_constructible<T>::value &&
+                        std::is_trivially_destructible<T>::value>>::type {};
+#endif // CXXBRIDGE1_RELOCATABLE
+
+} // namespace cxxbridge1
+} // namespace rust
diff --git a/tools/run_formatter.sh b/tools/run_formatter.sh
index a5f81a3..b53184d 100755
--- a/tools/run_formatter.sh
+++ b/tools/run_formatter.sh
@@ -16,5 +16,5 @@
   CLANG_FORMAT="./clang/bin/clang-format"
 fi
 
-git ls-files | egrep '\.(h|cc)$' | fgrep -v 'third_party' |\
+git ls-files | egrep '\.(h|cc)$' | grep -Ev 'third_party|vendor' |\
     xargs "$CLANG_FORMAT" $opts