//
// Copyright (c) 2016-2024 Kris Jusiak (kris at jusiak dot net)
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#ifndef BOOST_SML_HPP
#define BOOST_SML_HPP
#if (__cplusplus < 201305L && _MSC_VER < 1900)
#error "[Boost::ext].SML requires C++14 support (Clang-3.4+, GCC-5.1+, MSVC-2015+)"
#else
#if defined(__ICCARM__) && __IAR_SYSTEMS_ICC__ < 8
#error "[Boost::ext].SML requires C++14 support (IAR C/C++ ARM 8.1+)"
#endif
#define BOOST_SML_VERSION 1'1'13
#define BOOST_SML_NAMESPACE_BEGIN \
  namespace boost {               \
  inline namespace ext {          \
  namespace sml {                 \
  inline namespace v1_1_13 {
#define BOOST_SML_NAMESPACE_END \
  }                             \
  }                             \
  }                             \
  }
#if defined(__clang__)
#define __BOOST_SML_UNUSED __attribute__((unused))
#define __BOOST_SML_VT_INIT \
  {}
#if !defined(BOOST_SML_CFG_DISABLE_MIN_SIZE)
#define __BOOST_SML_ZERO_SIZE_ARRAY(...) __VA_ARGS__ _[0]
#else
#define __BOOST_SML_ZERO_SIZE_ARRAY(...)
#endif
#define __BOOST_SML_ZERO_SIZE_ARRAY_CREATE(...)
#define __BOOST_SML_TEMPLATE_KEYWORD template
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wgnu-string-literal-operator-template"
#pragma clang diagnostic ignored "-Wzero-length-array"
#elif defined(__GNUC__)
#if !defined(__has_builtin)
#define __BOOST_SML_DEFINED_HAS_BUILTIN
#define __has_builtin(...) 0
#endif
#define __BOOST_SML_UNUSED __attribute__((unused))
#define __BOOST_SML_VT_INIT \
  {}
#if !defined(BOOST_SML_CFG_DISABLE_MIN_SIZE)
#define __BOOST_SML_ZERO_SIZE_ARRAY(...) __VA_ARGS__ _[0]{}
#else
#define __BOOST_SML_ZERO_SIZE_ARRAY(...)
#endif
#define __BOOST_SML_ZERO_SIZE_ARRAY_CREATE(...) __VA_ARGS__ ? __VA_ARGS__ : 1
#define __BOOST_SML_TEMPLATE_KEYWORD template
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpedantic"
#if defined(__GNUC__) && (__GNUC__ >= 10)
#pragma GCC diagnostic ignored "-Wsubobject-linkage"
#endif
#elif defined(_MSC_VER) && !defined(__clang__)
#define __BOOST_SML_DEFINED_HAS_BUILTIN
#define __has_builtin(...) __has_builtin##__VA_ARGS__
#define __has_builtin__make_integer_seq(...) 1
#define __BOOST_SML_UNUSED
#define __BOOST_SML_VT_INIT
#define __BOOST_SML_ZERO_SIZE_ARRAY(...)
#define __BOOST_SML_ZERO_SIZE_ARRAY_CREATE(...) __VA_ARGS__ ? __VA_ARGS__ : 1
#if defined(_MSC_VER) && !defined(__clang__) && _MSC_VER >= 1910  // MSVC 2017
#define __BOOST_SML_TEMPLATE_KEYWORD template
#else
#define __BOOST_SML_TEMPLATE_KEYWORD
#endif
#pragma warning(disable : 4503)
#pragma warning(disable : 4200)
#elif defined(__ICCARM__)
#if !defined(__has_builtin)
#define __BOOST_SML_DEFINED_HAS_BUILTIN
#define __has_builtin(...) 0
#endif
/* Needs IAR language extensions */
#define __BOOST_SML_UNUSED __attribute__((unused))
#define __BOOST_SML_VT_INIT \
  {}
#define __BOOST_SML_ZERO_SIZE_ARRAY(...)
#define __BOOST_SML_ZERO_SIZE_ARRAY_CREATE(...) __VA_ARGS__ ? __VA_ARGS__ : 1
#define __BOOST_SML_TEMPLATE_KEYWORD template
#endif
BOOST_SML_NAMESPACE_BEGIN
#define __BOOST_SML_REQUIRES(...) typename aux::enable_if<__VA_ARGS__, int>::type = 0
namespace aux {
using byte = unsigned char;
struct none_type {};
template <class...>
struct type_wrapper {};
template <class T, T>
struct non_type {};
template <class, class>
struct pair {};
template <class...>
struct type_list {
  using type = type_list;
};
template <bool...>
struct bool_list {
  using type = bool_list;
};
template <class... Ts>
struct inherit : Ts... {
  using type = inherit;
};
template <class T>
struct identity {
  using type = T;
};
template <class T>
T &&declval();
template <class T, T V>
struct integral_constant {
  using type = integral_constant;
  static constexpr T value = V;
};
using true_type = integral_constant<bool, true>;
using false_type = integral_constant<bool, false>;
template <class... Ts>
using void_t = void;
template <class...>
struct always : true_type {};
template <class...>
struct never : false_type {};
namespace detail {
template <bool>
struct conditional;
template <>
struct conditional<false> {
  template <class, class T>
  using fn = T;
};
template <>
struct conditional<true> {
  template <class T, class>
  using fn = T;
};
}  // namespace detail
template <bool B, class T, class F>
struct conditional {
  using type = typename detail::conditional<B>::template fn<T, F>;
};
template <bool B, class T, class F>
using conditional_t = typename conditional<B, T, F>::type;
template <bool B, class T = void>
struct enable_if {};
template <class T>
struct enable_if<true, T> {
  using type = T;
};
template <bool B, class T = void>
using enable_if_t = typename enable_if<B, T>::type;
template <class, class>
struct is_same : false_type {};
template <class T>
struct is_same<T, T> : true_type {};
template <class T, class U>
#if defined(_MSC_VER) && !defined(__clang__)
struct is_base_of : integral_constant<bool, __is_base_of(T, U)> {
};
#else
using is_base_of = integral_constant<bool, __is_base_of(T, U)>;
#endif
template <class T, class... TArgs>
decltype(T(declval<TArgs>()...), true_type{}) test_is_constructible(int);
template <class, class...>
false_type test_is_constructible(...);
template <class T, class... TArgs>
#if defined(_MSC_VER) && !defined(__clang__)
struct is_constructible : decltype(test_is_constructible<T, TArgs...>(0)) {
};
#else
using is_constructible = decltype(test_is_constructible<T, TArgs...>(0));
#endif
template <class T, class U>
struct is_empty_base : T {
  U _;
};
template <class T>
struct is_empty : aux::integral_constant<bool, sizeof(is_empty_base<T, none_type>) == sizeof(none_type)> {};
template <class>
struct function_traits;
template <class R, class... TArgs>
struct function_traits<R (*)(TArgs...)> {
  using args = type_list<TArgs...>;
};
template <class R, class... TArgs>
struct function_traits<R(TArgs...)> {
  using args = type_list<TArgs...>;
};
template <class R, class T, class... TArgs>
struct function_traits<R (T::*)(TArgs...)> {
  using args = type_list<TArgs...>;
};
template <class R, class T, class... TArgs>
struct function_traits<R (T::*)(TArgs...) const> {
  using args = type_list<TArgs...>;
};
#if defined(__cpp_noexcept_function_type)
template <class R, class... TArgs>
struct function_traits<R (*)(TArgs...) noexcept> {
  using args = type_list<TArgs...>;
};
template <class R, class... TArgs>
struct function_traits<R(TArgs...) noexcept> {
  using args = type_list<TArgs...>;
};
template <class R, class T, class... TArgs>
struct function_traits<R (T::*)(TArgs...) noexcept> {
  using args = type_list<TArgs...>;
};
template <class R, class T, class... TArgs>
struct function_traits<R (T::*)(TArgs...) const noexcept> {
  using args = type_list<TArgs...>;
};
#endif
template <class T>
using function_traits_t = typename function_traits<T>::args;
template <class T>
struct remove_const {
  using type = T;
};
template <class T>
struct remove_const<const T> {
  using type = T;
};
template <class T>
using remove_const_t = typename remove_const<T>::type;
template <class T>
struct remove_reference {
  using type = T;
};
template <class T>
struct remove_reference<T &> {
  using type = T;
};
template <class T>
struct remove_reference<T &&> {
  using type = T;
};
template <class T>
using remove_reference_t = typename remove_reference<T>::type;
template <class T>
struct remove_pointer {
  using type = T;
};
template <class T>
struct remove_pointer<T *> {
  using type = T;
};
template <class T>
using remove_pointer_t = typename remove_pointer<T>::type;
}  // namespace aux
namespace aux {
using swallow = int[];
template<typename F, template<class...> class L, class... Ts>
void for_each(L<Ts...>, F f) {
#if defined(__cpp_fold_expressions)
  (f(identity<Ts>{}),...);
#else
  (void)aux::swallow{0, (f(identity<Ts>{}), 0)...};
#endif
}
template <int...>
struct index_sequence {
  using type = index_sequence;
};
#if __has_builtin(__make_integer_seq)
template <class T, T...>
struct integer_sequence;
template <int... Ns>
struct integer_sequence<int, Ns...> {
  using type = index_sequence<Ns...>;
};
template <int N>
struct make_index_sequence_impl {
  using type = typename __make_integer_seq<integer_sequence, int, N>::type;
};
#else
template <class, class>
struct concat;
template <int... I1, int... I2>
struct concat<index_sequence<I1...>, index_sequence<I2...>> : index_sequence<I1..., (sizeof...(I1) + I2)...> {};
template <int N>
struct make_index_sequence_impl
    : concat<typename make_index_sequence_impl<N / 2>::type, typename make_index_sequence_impl<N - N / 2>::type>::type {};
template <>
struct make_index_sequence_impl<0> : index_sequence<> {};
template <>
struct make_index_sequence_impl<1> : index_sequence<0> {};
#endif
template <int N>
using make_index_sequence = typename make_index_sequence_impl<N>::type;
template <class...>
struct join {
  using type = type_list<>;
};
template <class T>
struct join<T> {
  using type = T;
};
template <class... Ts>
struct join<type_list<Ts...>> : type_list<Ts...> {};
template <class... T1s, class... T2s>
struct join<type_list<T1s...>, type_list<T2s...>> : type_list<T1s..., T2s...> {};
template <class... T1s, class... T2s, class... Us>
struct join<type_list<T1s...>, type_list<T2s...>, Us...> : join<type_list<T1s..., T2s...>, Us...> {};
template <class... T1s, class... T2s, class... T3s, class... T4s, class... Us>
struct join<type_list<T1s...>, type_list<T2s...>, type_list<T3s...>, type_list<T4s...>, Us...>
    : join<type_list<T1s..., T2s..., T3s..., T4s...>, Us...> {};
template <class... T1s, class... T2s, class... T3s, class... T4s, class... T5s, class... T6s, class... T7s, class... T8s,
          class... Us>
struct join<type_list<T1s...>, type_list<T2s...>, type_list<T3s...>, type_list<T4s...>, type_list<T5s...>, type_list<T6s...>,
            type_list<T7s...>, type_list<T8s...>, Us...>
    : join<type_list<T1s..., T2s..., T3s..., T4s... , T5s..., T6s..., T7s..., T8s...>, Us...> {};
template <class... T01s, class... T02s, class... T03s, class... T04s, class... T05s, class... T06s, class... T07s, class... T08s,
          class... T09s, class... T10s, class... T11s, class... T12s, class... T13s, class... T14s, class... T15s, class... T16s,
          class... Us>
struct join<type_list<T01s...>, type_list<T02s...>, type_list<T03s...>, type_list<T04s...>, type_list<T05s...>, type_list<T06s...>,
            type_list<T07s...>, type_list<T08s...>, type_list<T09s...>, type_list<T10s...>, type_list<T11s...>, type_list<T12s...>,
            type_list<T13s...>, type_list<T14s...>, type_list<T15s...>, type_list<T16s...>, Us...>
    : join<type_list<T01s..., T02s..., T03s..., T04s..., T05s..., T06s..., T07s..., T08s..., T09s..., T10s..., T11s..., T12s...,
                     T13s..., T14s..., T15s..., T16s...>, Us...> {};
template <class... T01s, class... T02s, class... T03s, class... T04s, class... T05s, class... T06s, class... T07s, class... T08s,
          class... T09s, class... T10s, class... T11s, class... T12s, class... T13s, class... T14s, class... T15s, class... T16s,
          class... T17s, class... T18s, class... T19s, class... T20s, class... T21s, class... T22s, class... T23s, class... T24s,
          class... T25s, class... T26s, class... T27s, class... T28s, class... T29s, class... T30s, class... T31s, class... T32s,
          class... Us>
struct join<type_list<T01s...>, type_list<T02s...>, type_list<T03s...>, type_list<T04s...>, type_list<T05s...>, type_list<T06s...>,
            type_list<T07s...>, type_list<T08s...>, type_list<T09s...>, type_list<T10s...>, type_list<T11s...>, type_list<T12s...>,
            type_list<T13s...>, type_list<T14s...>, type_list<T15s...>, type_list<T16s...>, type_list<T17s...>, type_list<T18s...>,
            type_list<T19s...>, type_list<T20s...>, type_list<T21s...>, type_list<T22s...>, type_list<T23s...>, type_list<T24s...>,
            type_list<T25s...>, type_list<T26s...>, type_list<T27s...>, type_list<T28s...>, type_list<T29s...>, type_list<T30s...>,
            type_list<T31s...>, type_list<T32s...>, Us...>
    : join<type_list<T01s..., T02s..., T03s..., T04s..., T05s..., T06s..., T07s..., T08s..., T09s..., T10s..., T11s..., T12s...,
                     T13s..., T14s..., T15s..., T16s..., T17s..., T18s..., T19s..., T20s..., T21s..., T22s..., T23s..., T24s...,
                     T25s..., T26s..., T27s..., T28s..., T29s..., T30s..., T31s..., T32s...>, Us...> {};
template <class... T01s, class... T02s, class... T03s, class... T04s, class... T05s, class... T06s, class... T07s, class... T08s,
          class... T09s, class... T10s, class... T11s, class... T12s, class... T13s, class... T14s, class... T15s, class... T16s,
          class... T17s, class... T18s, class... T19s, class... T20s, class... T21s, class... T22s, class... T23s, class... T24s,
          class... T25s, class... T26s, class... T27s, class... T28s, class... T29s, class... T30s, class... T31s, class... T32s,
          class... T33s, class... T34s, class... T35s, class... T36s, class... T37s, class... T38s, class... T39s, class... T40s,
          class... T41s, class... T42s, class... T43s, class... T44s, class... T45s, class... T46s, class... T47s, class... T48s,
          class... T49s, class... T50s, class... T51s, class... T52s, class... T53s, class... T54s, class... T55s, class... T56s,
          class... T57s, class... T58s, class... T59s, class... T60s, class... T61s, class... T62s, class... T63s, class... T64s,
          class... Us>
struct join<type_list<T01s...>, type_list<T02s...>, type_list<T03s...>, type_list<T04s...>, type_list<T05s...>, type_list<T06s...>,
            type_list<T07s...>, type_list<T08s...>, type_list<T09s...>, type_list<T10s...>, type_list<T11s...>, type_list<T12s...>,
            type_list<T13s...>, type_list<T14s...>, type_list<T15s...>, type_list<T16s...>, type_list<T17s...>, type_list<T18s...>,
            type_list<T19s...>, type_list<T20s...>, type_list<T21s...>, type_list<T22s...>, type_list<T23s...>, type_list<T24s...>,
            type_list<T25s...>, type_list<T26s...>, type_list<T27s...>, type_list<T28s...>, type_list<T29s...>, type_list<T30s...>,
            type_list<T31s...>, type_list<T32s...>, type_list<T33s...>, type_list<T34s...>, type_list<T35s...>, type_list<T36s...>,
            type_list<T37s...>, type_list<T38s...>, type_list<T39s...>, type_list<T40s...>, type_list<T41s...>, type_list<T42s...>,
            type_list<T43s...>, type_list<T44s...>, type_list<T45s...>, type_list<T46s...>, type_list<T47s...>, type_list<T48s...>,
            type_list<T49s...>, type_list<T50s...>, type_list<T51s...>, type_list<T52s...>, type_list<T53s...>, type_list<T54s...>,
            type_list<T55s...>, type_list<T56s...>, type_list<T57s...>, type_list<T58s...>, type_list<T59s...>, type_list<T60s...>,
            type_list<T61s...>, type_list<T62s...>, type_list<T63s...>, type_list<T64s...>, Us...>
    : join<type_list<T01s..., T02s..., T03s..., T04s..., T05s..., T06s..., T07s..., T08s..., T09s..., T10s..., T11s..., T12s...,
                     T13s..., T14s..., T15s..., T16s..., T17s..., T18s..., T19s..., T20s..., T21s..., T22s..., T23s..., T24s...,
                     T25s..., T26s..., T27s..., T28s..., T29s..., T30s..., T31s..., T32s..., T33s..., T34s..., T35s..., T36s...,
                     T37s..., T38s..., T39s..., T40s..., T41s..., T42s..., T43s..., T44s..., T45s..., T46s..., T47s..., T48s...,
                     T49s..., T50s..., T51s..., T52s..., T53s..., T54s..., T55s..., T56s..., T57s..., T58s..., T59s..., T60s...,
                     T61s..., T62s..., T63s..., T64s...>, Us...> {};
template <class... TArgs>
using join_t = typename join<TArgs...>::type;
template <class Accumulator, class T>
struct add_unique {
  using type = conditional_t<is_base_of<type_wrapper<T>, Accumulator>::value, Accumulator, inherit<Accumulator, type_wrapper<T>>>;
};
template <class Accumulator, class T>
using add_unique_t = typename add_unique<Accumulator, T>::type;
template <class InheritHierarchy, class Accumulator = type_wrapper<>>
struct extract_types_impl;
template <class... Acc>
struct extract_types_impl<inherit<>, type_wrapper<Acc...>> {
  using type = type_wrapper<Acc...>;
};
template <class... Ts, class... Acc>
struct extract_types_impl<inherit<type_wrapper<Ts>...>, type_wrapper<Acc...>> {
  using type = type_wrapper<Acc..., Ts...>;
};
template <class... Inner, class T, class... Acc>
struct extract_types_impl<inherit<inherit<Inner...>, type_wrapper<T>>, type_wrapper<Acc...>>
    : extract_types_impl<inherit<Inner...>, type_wrapper<Acc..., T>> {};
template <class T>
using extract_types = typename extract_types_impl<T>::type;
template <class UniquesSoFar, class... RemainingTypes>
struct unique_impl;
template <class... UniqueTypes>
struct unique_impl<type_wrapper<UniqueTypes...>> : type_list<UniqueTypes...> {};
template <class... UniqueTypes, class Head, class... Tail>
struct unique_impl<type_wrapper<UniqueTypes...>, Head, Tail...> {
 private:
  using current_set = inherit<type_wrapper<UniqueTypes>...>;
  using next_uniques = conditional_t<
    is_base_of<type_wrapper<Head>, current_set>::value,
    type_wrapper<UniqueTypes...>,
    type_wrapper<UniqueTypes..., Head>
  >;
 public:
  using type = typename unique_impl<next_uniques, Tail...>::type;
};
template <class... UniqueTypes,
          class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8,
          class... Tail>
struct unique_impl<type_wrapper<UniqueTypes...>, T1, T2, T3, T4, T5, T6, T7, T8, Tail...>
{
 private:
  using initial_set = inherit<type_wrapper<UniqueTypes>...>;
  using after_1 = add_unique_t<initial_set, T1>;
  using after_2 = add_unique_t<after_1, T2>;
  using after_3 = add_unique_t<after_2, T3>;
  using after_4 = add_unique_t<after_3, T4>;
  using after_5 = add_unique_t<after_4, T5>;
  using after_6 = add_unique_t<after_5, T6>;
  using after_7 = add_unique_t<after_6, T7>;
  using after_8 = add_unique_t<after_7, T8>;
  using batch_result = extract_types<after_8>;
 public:
  using type = typename unique_impl<batch_result, Tail...>::type;
};
template <class... UniqueTypes,
          class T01, class T02, class T03, class T04, class T05, class T06, class T07, class T08,
          class T09, class T10, class T11, class T12, class T13, class T14, class T15, class T16,
          class... Tail>
struct unique_impl<type_wrapper<UniqueTypes...>,
                   T01, T02, T03, T04, T05, T06, T07, T08, T09, T10, T11, T12, T13, T14, T15, T16,
                   Tail...> {
 private:
  using initial_set = inherit<type_wrapper<UniqueTypes>...>;
  using after_01 = add_unique_t<initial_set, T01>;
  using after_02 = add_unique_t<after_01, T02>;
  using after_03 = add_unique_t<after_02, T03>;
  using after_04 = add_unique_t<after_03, T04>;
  using after_05 = add_unique_t<after_04, T05>;
  using after_06 = add_unique_t<after_05, T06>;
  using after_07 = add_unique_t<after_06, T07>;
  using after_08 = add_unique_t<after_07, T08>;
  using after_09 = add_unique_t<after_08, T09>;
  using after_10 = add_unique_t<after_09, T10>;
  using after_11 = add_unique_t<after_10, T11>;
  using after_12 = add_unique_t<after_11, T12>;
  using after_13 = add_unique_t<after_12, T13>;
  using after_14 = add_unique_t<after_13, T14>;
  using after_15 = add_unique_t<after_14, T15>;
  using after_16 = add_unique_t<after_15, T16>;
  using batch_result = extract_types<after_16>;
 public:
  using type = typename unique_impl<batch_result, Tail...>::type;
};
template <class... UniqueTypes,
          class T01, class T02, class T03, class T04, class T05, class T06, class T07, class T08,
          class T09, class T10, class T11, class T12, class T13, class T14, class T15, class T16,
          class T17, class T18, class T19, class T20, class T21, class T22, class T23, class T24,
          class T25, class T26, class T27, class T28, class T29, class T30, class T31, class T32,
          class... Tail>
struct unique_impl<type_wrapper<UniqueTypes...>,
                   T01, T02, T03, T04, T05, T06, T07, T08, T09, T10, T11, T12, T13, T14, T15, T16,
                   T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30, T31, T32,
                   Tail...> {
 private:
  using initial_set = inherit<type_wrapper<UniqueTypes>...>;
  using after_01 = add_unique_t<initial_set, T01>;
  using after_02 = add_unique_t<after_01, T02>;
  using after_03 = add_unique_t<after_02, T03>;
  using after_04 = add_unique_t<after_03, T04>;
  using after_05 = add_unique_t<after_04, T05>;
  using after_06 = add_unique_t<after_05, T06>;
  using after_07 = add_unique_t<after_06, T07>;
  using after_08 = add_unique_t<after_07, T08>;
  using after_09 = add_unique_t<after_08, T09>;
  using after_10 = add_unique_t<after_09, T10>;
  using after_11 = add_unique_t<after_10, T11>;
  using after_12 = add_unique_t<after_11, T12>;
  using after_13 = add_unique_t<after_12, T13>;
  using after_14 = add_unique_t<after_13, T14>;
  using after_15 = add_unique_t<after_14, T15>;
  using after_16 = add_unique_t<after_15, T16>;
  using after_17 = add_unique_t<after_16, T17>;
  using after_18 = add_unique_t<after_17, T18>;
  using after_19 = add_unique_t<after_18, T19>;
  using after_20 = add_unique_t<after_19, T20>;
  using after_21 = add_unique_t<after_20, T21>;
  using after_22 = add_unique_t<after_21, T22>;
  using after_23 = add_unique_t<after_22, T23>;
  using after_24 = add_unique_t<after_23, T24>;
  using after_25 = add_unique_t<after_24, T25>;
  using after_26 = add_unique_t<after_25, T26>;
  using after_27 = add_unique_t<after_26, T27>;
  using after_28 = add_unique_t<after_27, T28>;
  using after_29 = add_unique_t<after_28, T29>;
  using after_30 = add_unique_t<after_29, T30>;
  using after_31 = add_unique_t<after_30, T31>;
  using after_32 = add_unique_t<after_31, T32>;
  using batch_result = extract_types<after_32>;
 public:
  using type = typename unique_impl<batch_result, Tail...>::type;
};
template <class... UniqueTypes,
          class T01, class T02, class T03, class T04, class T05, class T06, class T07, class T08,
          class T09, class T10, class T11, class T12, class T13, class T14, class T15, class T16,
          class T17, class T18, class T19, class T20, class T21, class T22, class T23, class T24,
          class T25, class T26, class T27, class T28, class T29, class T30, class T31, class T32,
          class T33, class T34, class T35, class T36, class T37, class T38, class T39, class T40,
          class T41, class T42, class T43, class T44, class T45, class T46, class T47, class T48,
          class T49, class T50, class T51, class T52, class T53, class T54, class T55, class T56,
          class T57, class T58, class T59, class T60, class T61, class T62, class T63, class T64,
          class... Tail>
struct unique_impl<type_wrapper<UniqueTypes...>,
                   T01, T02, T03, T04, T05, T06, T07, T08, T09, T10, T11, T12, T13, T14, T15, T16,
                   T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30, T31, T32,
                   T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45, T46, T47, T48,
                   T49, T50, T51, T52, T53, T54, T55, T56, T57, T58, T59, T60, T61, T62, T63, T64,
                   Tail...> {
 private:
  using initial_set = inherit<type_wrapper<UniqueTypes>...>;
  using after_01 = add_unique_t<initial_set, T01>;
  using after_02 = add_unique_t<after_01, T02>;
  using after_03 = add_unique_t<after_02, T03>;
  using after_04 = add_unique_t<after_03, T04>;
  using after_05 = add_unique_t<after_04, T05>;
  using after_06 = add_unique_t<after_05, T06>;
  using after_07 = add_unique_t<after_06, T07>;
  using after_08 = add_unique_t<after_07, T08>;
  using after_09 = add_unique_t<after_08, T09>;
  using after_10 = add_unique_t<after_09, T10>;
  using after_11 = add_unique_t<after_10, T11>;
  using after_12 = add_unique_t<after_11, T12>;
  using after_13 = add_unique_t<after_12, T13>;
  using after_14 = add_unique_t<after_13, T14>;
  using after_15 = add_unique_t<after_14, T15>;
  using after_16 = add_unique_t<after_15, T16>;
  using after_17 = add_unique_t<after_16, T17>;
  using after_18 = add_unique_t<after_17, T18>;
  using after_19 = add_unique_t<after_18, T19>;
  using after_20 = add_unique_t<after_19, T20>;
  using after_21 = add_unique_t<after_20, T21>;
  using after_22 = add_unique_t<after_21, T22>;
  using after_23 = add_unique_t<after_22, T23>;
  using after_24 = add_unique_t<after_23, T24>;
  using after_25 = add_unique_t<after_24, T25>;
  using after_26 = add_unique_t<after_25, T26>;
  using after_27 = add_unique_t<after_26, T27>;
  using after_28 = add_unique_t<after_27, T28>;
  using after_29 = add_unique_t<after_28, T29>;
  using after_30 = add_unique_t<after_29, T30>;
  using after_31 = add_unique_t<after_30, T31>;
  using after_32 = add_unique_t<after_31, T32>;
  using after_33 = add_unique_t<after_32, T33>;
  using after_34 = add_unique_t<after_33, T34>;
  using after_35 = add_unique_t<after_34, T35>;
  using after_36 = add_unique_t<after_35, T36>;
  using after_37 = add_unique_t<after_36, T37>;
  using after_38 = add_unique_t<after_37, T38>;
  using after_39 = add_unique_t<after_38, T39>;
  using after_40 = add_unique_t<after_39, T40>;
  using after_41 = add_unique_t<after_40, T41>;
  using after_42 = add_unique_t<after_41, T42>;
  using after_43 = add_unique_t<after_42, T43>;
  using after_44 = add_unique_t<after_43, T44>;
  using after_45 = add_unique_t<after_44, T45>;
  using after_46 = add_unique_t<after_45, T46>;
  using after_47 = add_unique_t<after_46, T47>;
  using after_48 = add_unique_t<after_47, T48>;
  using after_49 = add_unique_t<after_48, T49>;
  using after_50 = add_unique_t<after_49, T50>;
  using after_51 = add_unique_t<after_50, T51>;
  using after_52 = add_unique_t<after_51, T52>;
  using after_53 = add_unique_t<after_52, T53>;
  using after_54 = add_unique_t<after_53, T54>;
  using after_55 = add_unique_t<after_54, T55>;
  using after_56 = add_unique_t<after_55, T56>;
  using after_57 = add_unique_t<after_56, T57>;
  using after_58 = add_unique_t<after_57, T58>;
  using after_59 = add_unique_t<after_58, T59>;
  using after_60 = add_unique_t<after_59, T60>;
  using after_61 = add_unique_t<after_60, T61>;
  using after_62 = add_unique_t<after_61, T62>;
  using after_63 = add_unique_t<after_62, T63>;
  using after_64 = add_unique_t<after_63, T64>;
  using batch_result = extract_types<after_64>;
 public:
  using type = typename unique_impl<batch_result, Tail...>::type;
};
template <class... Ts>
struct unique : unique_impl<type_wrapper<>, Ts...> {};
template <class T>
struct unique<T> : type_list<T> {};
template <class... Ts>
using unique_t = typename unique<Ts...>::type;
template <class...>
struct is_unique;
template <class T>
struct is_unique<T> : true_type {};
template <class T, class... Rs, class... Ts>
struct is_unique<type_wrapper<Rs...>, T, Ts...>
    : conditional_t<is_base_of<type_wrapper<T>, inherit<type_wrapper<Rs>...>>::value, false_type, is_unique<type_wrapper<Rs..., T>, Ts...>> {};
template <class... Ts>
using is_unique_t = is_unique<type_wrapper<>, Ts...>;
template <template <class...> class, class>
struct apply;
template <template <class...> class T, template <class...> class U, class... Ts>
struct apply<T, U<Ts...>> {
  using type = T<Ts...>;
};
template <template <class...> class T, class D>
using apply_t = typename apply<T, D>::type;
template <int, class T>
struct tuple_type {
  constexpr explicit tuple_type(const T &object) : value(object) {}
  T value;
};
template <class, class...>
struct tuple_impl;
template <int... Ns, class... Ts>
struct tuple_impl<index_sequence<Ns...>, Ts...> : tuple_type<Ns, Ts>... {
  constexpr explicit tuple_impl(Ts... ts) : tuple_type<Ns, Ts>(ts)... {}
};
template <>
struct tuple_impl<index_sequence<0>> {
  __BOOST_SML_ZERO_SIZE_ARRAY(byte);
};
template <class... Ts>
using tuple = tuple_impl<make_index_sequence<sizeof...(Ts)>, Ts...>;
template <int N, class T>
constexpr T &get_by_id(tuple_type<N, T> *object) {
  return static_cast<tuple_type<N, T> &>(*object).value;
}
struct init {};
struct pool_type_base {
  __BOOST_SML_ZERO_SIZE_ARRAY(byte);
};
template <class T, class = void>
struct pool_type_impl : pool_type_base {
  constexpr explicit pool_type_impl(T object) : value{object} {}
  template <class TObject>
  constexpr pool_type_impl(init i, TObject object) : value{i, object} {}
  T value{};
};
#if defined(BOOST_SML_CREATE_DEFAULT_CONSTRUCTIBLE_DEPS)
template <class T>
struct pool_type_impl<T &, aux::enable_if_t<aux::is_constructible<T>::value && aux::is_constructible<T, const T &>::value>>
    : pool_type_base {
  constexpr explicit pool_type_impl(T &value) : value{value} {}
  template <class TObject>
  constexpr explicit pool_type_impl(TObject value) : value_{value}, value{value_} {}
  template <class TObject>
  constexpr pool_type_impl(const init &i, const TObject &object) : value(i, object) {}
  T value_{};
  T &value;
};
#endif
template <class T>
struct pool_type : pool_type_impl<T> {
  using pool_type_impl<T>::pool_type_impl;
};
template <class T>
struct missing_ctor_parameter {
  static constexpr auto value = false;
  constexpr auto operator()() const { return T{}(); }
  template <class U, __BOOST_SML_REQUIRES(!aux::is_base_of<pool_type_base, U>::value && aux::is_constructible<U>::value)>
  constexpr operator U() {
    return {};
  }
#if !(defined(_MSC_VER) && !defined(__clang__))
  template <class TMissing, __BOOST_SML_REQUIRES(!aux::is_base_of<pool_type_base, TMissing>::value)>
  constexpr operator TMissing &() const {
    static_assert(missing_ctor_parameter<TMissing>::value,
                  "State Machine is missing a constructor parameter! Check out the `missing_ctor_parameter` error to see the "
                  "missing type.");
  }
#endif
};
template <class T>
constexpr missing_ctor_parameter<T> try_get(...) {
  return {};
}
template <class T>
constexpr T try_get(const pool_type<T> *object) {
  return object->value;
}
template <class T>
constexpr const T &try_get(const pool_type<const T &> *object) {
  return object->value;
}
template <class T>
constexpr T &try_get(const pool_type<T &> *object) {
  return object->value;
}
template <class T>
constexpr const T *try_get(const pool_type<const T *> *object) {
  return object->value;
}
template <class T>
constexpr T *try_get(const pool_type<T *> *object) {
  return object->value;
}
template <class T, class TPool>
constexpr bool would_instantiate_missing_ctor_parameter() {
  return is_same<missing_ctor_parameter<T>, decltype(try_get<T>(aux::declval<TPool>()))>::value;
}
template <class T, class TPool>
constexpr T &get(TPool &p) {
  return static_cast<pool_type<T> &>(p).value;
}
template <class T, class TPool>
constexpr const T &cget(const TPool &p) {
  return static_cast<const pool_type<T> &>(p).value;
}
template <class T, class TPool>
T *get(TPool *p) {
  return static_cast<pool_type<T> &>(p).value;
}
template <class T, class TPool>
const T *cget(const TPool *p) {
  return static_cast<const pool_type<T> &>(p).value;
}
template <class... Ts>
struct pool : pool_type<Ts>... {
  using boost_di_inject__ = type_list<Ts...>;
  constexpr pool() = default;
  constexpr explicit pool(Ts... ts) : pool_type<Ts>(ts)... {}
  template <class... TArgs>
  constexpr pool(init, const pool<TArgs...> &p)
      : pool_type<Ts>(try_get<aux::remove_const_t<aux::remove_reference_t<aux::remove_pointer_t<Ts>>>>(&p))... {}
  template <class... TArgs>
  constexpr pool(const pool<TArgs...> &p) : pool_type<Ts>(init{}, p)... {}
};
template <>
struct pool<> {
  using boost_di_inject__ = type_list<>;
  pool() = default;
  template <class... Ts>
  constexpr explicit pool(Ts &&...) {}
  __BOOST_SML_ZERO_SIZE_ARRAY(byte);
};
template <int, class>
struct type_id_type {};
template <class, class...>
struct type_id_impl;
template <int... Ns, class... Ts>
struct type_id_impl<index_sequence<Ns...>, Ts...> : type_id_type<Ns, Ts>... {};
template <class... Ts>
struct type_id : type_id_impl<make_index_sequence<sizeof...(Ts)>, Ts...> {};
template <class R, class T, int N>
constexpr R get_id(type_id_type<N, T> *) {
  return static_cast<R>(N);
}
template <template <class...> class, class T>
struct is : false_type {};
template <template <class...> class T, class... Ts>
struct is<T, T<Ts...>> : true_type {};
template <class>
struct size;
template <template <class...> class T, class... Ts>
struct size<T<Ts...>> {
  static constexpr auto value = sizeof...(Ts);
};
template <int... Ts>
constexpr int max_element() {
  int max = 0;
  (void)swallow{0, (Ts > max ? max = Ts : max)...};
  return max;
}
template <class TExpr, class = void>
struct zero_wrapper : TExpr {
  using type = TExpr;
  constexpr explicit zero_wrapper(const TExpr &expr) : TExpr(expr) {}
  constexpr const TExpr &get() const { return *this; }
};
template <class R, class TBase, class... TArgs, class T>
struct zero_wrapper<R (TBase::*)(TArgs...), T> {
  using type = R (TBase::*)(TArgs...);
  constexpr explicit zero_wrapper(type ptr) : ptr{ptr} {}
  constexpr auto operator()(TBase &self, TArgs... args) { return (self.*ptr)(args...); }
  constexpr type get() const { return ptr; }

 private:
  type ptr{};
};
template <class R, class TBase, class... TArgs, class T>
struct zero_wrapper<R (TBase::*)(TArgs...) const, T> {
  using type = R (TBase::*)(TArgs...) const;
  constexpr explicit zero_wrapper(type ptr) : ptr{ptr} {}
  constexpr auto operator()(TBase &self, TArgs... args) { return (self.*ptr)(args...); }
  constexpr type get() const { return ptr; }

 private:
  type ptr{};
};
template <class R, class... TArgs, class T>
struct zero_wrapper<R (*)(TArgs...), T> {
  using type = R (*)(TArgs...);
  explicit zero_wrapper(type ptr) : ptr{ptr} {}
  constexpr auto operator()(TArgs... args) { return (*ptr)(args...); }
  constexpr type get() const { return ptr; }

 private:
  type ptr{};
};
#if defined(__cpp_noexcept_function_type)
template <class R, class TBase, class... TArgs, class T>
struct zero_wrapper<R (TBase::*)(TArgs...) noexcept, T> {
  using type = R (TBase::*)(TArgs...) noexcept;
  constexpr explicit zero_wrapper(type ptr) : ptr{ptr} {}
  constexpr auto operator()(TBase &self, TArgs... args) { return (self.*ptr)(args...); }
  constexpr type get() const { return ptr; }

 private:
  type ptr {};
};
template <class R, class TBase, class... TArgs, class T>
struct zero_wrapper<R (TBase::*)(TArgs...) const noexcept, T> {
  using type = R (TBase::*)(TArgs...) const noexcept;
  constexpr explicit zero_wrapper(type ptr) : ptr{ptr} {}
  constexpr auto operator()(TBase &self, TArgs... args) { return (self.*ptr)(args...); }
  constexpr type get() const { return ptr; }

 private:
  type ptr {};
};
template <class R, class... TArgs, class T>
struct zero_wrapper<R (*)(TArgs...) noexcept, T> {
  using type = R (*)(TArgs...) noexcept;
  explicit zero_wrapper(type ptr) : ptr{ptr} {}
  constexpr auto operator()(TArgs... args) { return (*ptr)(args...); }
  constexpr type get() const { return ptr; }

 private:
  type ptr {};
};
#endif
template <class, class>
struct zero_wrapper_impl;
template <class TExpr, class... TArgs>
struct zero_wrapper_impl<TExpr, type_list<TArgs...>> {
  constexpr auto operator()(TArgs... args) const { return reinterpret_cast<const TExpr &>(*this)(args...); }
  __BOOST_SML_ZERO_SIZE_ARRAY(byte);
};
template <class TExpr>
struct zero_wrapper<TExpr, void_t<decltype(+declval<TExpr>())>>
    : zero_wrapper_impl<TExpr, function_traits_t<decltype(&TExpr::operator())>> {
  using type = TExpr;
  template <class... Ts>
  constexpr zero_wrapper(Ts &&...) {}
  const TExpr &get() const { return reinterpret_cast<const TExpr &>(*this); }
};
namespace detail {
template <class, int N, int... Ns>
auto get_type_name(const char *ptr, index_sequence<Ns...>) {
  static const char str[] = {ptr[N + Ns]..., 0};
  return str;
}
}  // namespace detail
template <class T>
const char *get_type_name() {
#if defined(_MSC_VER) && !defined(__clang__)
  return detail::get_type_name<T, 65>(__FUNCSIG__, make_index_sequence<sizeof(__FUNCSIG__) - 65 - 8>{});
#elif defined(__clang__) && (__clang_major__ >= 12)
  return detail::get_type_name<T, 50>(__PRETTY_FUNCTION__, make_index_sequence<sizeof(__PRETTY_FUNCTION__) - 50 - 2>{});
#elif defined(__clang__)
  return detail::get_type_name<T, 63>(__PRETTY_FUNCTION__, make_index_sequence<sizeof(__PRETTY_FUNCTION__) - 63 - 2>{});
#elif defined(__GNUC__)
  return detail::get_type_name<T, 69>(__PRETTY_FUNCTION__, make_index_sequence<sizeof(__PRETTY_FUNCTION__) - 69 - 2>{});
#elif defined(__ICCARM__)
  return detail::get_type_name<T, 72>(__PRETTY_FUNCTION__, make_index_sequence<sizeof(__PRETTY_FUNCTION__) - 72 -2>{});
#endif
}
#if defined(__cpp_nontype_template_parameter_class) || \
    defined(__cpp_nontype_template_args) && __cpp_nontype_template_args >= 201911L
template <auto N>
struct fixed_string {
  static constexpr auto size = N;
  char data[N + 1]{};
  constexpr fixed_string(char const *str) {
    for (decltype(N) i = 0; i < N; ++i) {
      data[i] = str[i];
    }
  }
};
template <auto N>
fixed_string(char const (&)[N]) -> fixed_string<N - 1>;
#endif
template <class T, T...>
struct string;
template <char... Chrs>
struct string<char, Chrs...> {
  using type = string;
  static auto c_str() {
    static constexpr char str[] = {Chrs..., 0};
    return str;
  }
};
template <class T>
struct string<T> {
  using type = T;
  constexpr static auto c_str() { return c_str_impl((T *)0); }
  template <class U>
  constexpr static decltype(U::c_str()) c_str_impl(U *) {
    return U::c_str();
  }
  constexpr static auto c_str_impl(...) { return get_type_name<T>(); }
};
}  // namespace aux
template <class T>
constexpr auto wrap(T callback) {
  return aux::zero_wrapper<T, T>{callback};
}
namespace back {
namespace policies {
struct defer_queue_policy__ {};
template <template <class...> class T>
struct defer_queue : aux::pair<back::policies::defer_queue_policy__, defer_queue<T>> {
  template <class U>
  using rebind = T<U>;
  using flag = bool;
};
}  // namespace policies
}  // namespace back
namespace back {
template <class... Ts>
class queue_event {
  using ids_t = aux::type_id<Ts...>;
  static constexpr auto alignment = aux::max_element<alignof(Ts)...>();
  static constexpr auto size = aux::max_element<sizeof(Ts)...>();
  template <class T>
  constexpr static void dtor_impl(aux::byte *data) {
    (void)data;
    reinterpret_cast<T *>(data)->~T();
  }
  template <class T>
  constexpr static void move_impl(aux::byte (&data)[size], queue_event &&other) {
    new (&data) T(static_cast<T &&>(*reinterpret_cast<T *>(other.data)));
  }

 public:
  constexpr queue_event() : dtor(nullptr) {}
  constexpr queue_event(queue_event &&other) : id(other.id), dtor(other.dtor), move(other.move) {
    move(data, static_cast<queue_event &&>(other));
  }
  constexpr queue_event &operator=(queue_event &&other) {
    if (dtor != nullptr) {
      dtor(data);
    }
    id = other.id;
    dtor = other.dtor;
    move = other.move;
    move(data, static_cast<queue_event &&>(other));
    return *this;
  }
  constexpr queue_event(const queue_event &) = delete;
  constexpr queue_event &operator=(const queue_event &) = delete;
  template <class T>
  constexpr queue_event(T object) {
    id = aux::get_id<int, T>((ids_t *)0);
    dtor = &dtor_impl<T>;
    move = &move_impl<T>;
    new (&data) T(static_cast<T &&>(object));
  }
  ~queue_event() {
    if (dtor) {
      dtor(data);
    }
  }
  alignas(alignment) aux::byte data[size];
  int id = -1;

 private:
  void (*dtor)(aux::byte *);
  void (*move)(aux::byte (&)[size], queue_event &&);
};
template <class TEvent>
class queue_event_call {
  using call_t = void (*)(void *, const TEvent &);

 public:
  constexpr queue_event_call() = default;
  constexpr explicit queue_event_call(const call_t &call) : call{call} {}
  call_t call{};
};
template <class... TEvents>
struct queue_handler : queue_event_call<TEvents>... {
  constexpr queue_handler() = default;
  template <class TQueue, class = typename TQueue::container_type>
  constexpr explicit queue_handler(TQueue &queue)
      : queue_event_call<TEvents>(queue_handler::push_impl<TQueue, TEvents>)..., queue_{&queue} {}
  template <class TEvent>
  constexpr void operator()(const TEvent &event) {
    static_cast<queue_event_call<TEvent> *>(this)->call(queue_, event);
  }

 private:
  template <class TQueue, class TEvent>
  constexpr static auto push_impl(void *queue, const TEvent &event) {
    static_cast<TQueue *>(queue)->push(event);
  }
  void *queue_{};
};
template <class... TEvents>
struct deque_handler : queue_event_call<TEvents>... {
  constexpr deque_handler() = default;
  template <class TDeque, class = typename TDeque::allocator_type>
  constexpr explicit deque_handler(TDeque &deque)
      : queue_event_call<TEvents>(deque_handler::push_impl<TDeque, TEvents>)..., deque_{&deque} {}
  template <class TEvent>
  constexpr void operator()(const TEvent &event) {
    static_cast<queue_event_call<TEvent> *>(this)->call(deque_, event);
  }

 private:
  template <class TDeque, class TEvent>
  constexpr static auto push_impl(void *deque, const TEvent &event) {
    static_cast<TDeque *>(deque)->push_back(event);
  }
  void *deque_{};
};
}  // namespace back
namespace back {
struct _ {};
struct initial {};
struct unexpected {};
struct entry_exit {};
struct terminate_state {
  constexpr static auto c_str() { return "terminate"; }
};
struct internal_event {
  constexpr static auto c_str() { return "internal_event"; }
};
struct anonymous : internal_event {
  constexpr static auto c_str() { return "anonymous"; }
};
template <class T, class TEvent = T>
struct on_entry : internal_event, entry_exit {
  constexpr static auto c_str() { return "on_entry"; }
  constexpr explicit on_entry(const TEvent &event = {}) : event_(event) {}
  const TEvent &event_;
};
template <class T, class TEvent = T>
struct on_exit : internal_event, entry_exit {
  constexpr static auto c_str() { return "on_exit"; }
  constexpr explicit on_exit(const TEvent &event = {}) : event_(event) {}
  const TEvent &event_;
};
template <class T, class TException = T>
struct exception : internal_event {
  using type = TException;
  constexpr explicit exception(const TException &exception = {}) : exception_(exception) {}
  const TException &exception_;
};
template <class T, class TEvent = T>
struct unexpected_event : internal_event, unexpected {
  constexpr explicit unexpected_event(const TEvent &event = {}) : event_(event) {}
  const TEvent &event_;
};
template <class TEvent>
struct event_type {
  using event_t = TEvent;
  using generic_t = TEvent;
  using mapped_t = void;
};
template <class TEvent>
struct event_type<exception<TEvent>> {
  using event_t = TEvent;
  using generic_t = exception<TEvent>;
  using mapped_t = void;
};
template <class TEvent, class T>
struct event_type<unexpected_event<T, TEvent>> {
  using event_t = TEvent;
  using generic_t = unexpected_event<T>;
  using mapped_t = void;
};
template <class TEvent, class T>
struct event_type<on_entry<T, TEvent>> {
  using event_t = TEvent;
  using generic_t = on_entry<T>;
  using mapped_t = on_entry<T, TEvent>;
};
template <class TEvent, class T>
struct event_type<on_exit<T, TEvent>> {
  using event_t = TEvent;
  using generic_t = on_exit<T>;
  using mapped_t = on_exit<T, TEvent>;
};
template <class TEvent>
using get_event_t = typename event_type<TEvent>::event_t;
template <class TEvent>
using get_generic_t = typename event_type<TEvent>::generic_t;
template <class TEvent>
using get_mapped_t = typename event_type<TEvent>::mapped_t;
template <class... TEvents>
struct process : queue_handler<TEvents...> {
  using queue_handler<TEvents...>::queue_handler;
};
template <class... TEvents>
struct defer : deque_handler<TEvents...> {
  using deque_handler<TEvents...>::deque_handler;
};
}  // namespace back
namespace back {
template <class>
class sm;
template <class>
struct sm_impl;
template <class, class...>
struct sm_policy;
template <class TEvent>
using get_event = aux::conditional_t<aux::is_base_of<internal_event, TEvent>::value, aux::type_list<>, aux::type_list<TEvent>>;
template <class, class, class TEvent>
struct get_all_events_impl {
  using type = get_event<TEvent>;
};
template <class TSrc, class TDst, class TEvent>
struct get_all_events_impl<TSrc, TDst, unexpected_event<TEvent>> {
  using type = aux::type_list<TEvent>;
};
template <class TSrc, class TDst, class TEvent>
struct get_all_events_impl<sm<TSrc>, TDst, TEvent> {
  using type = aux::join_t<get_event<TEvent>, typename sm<TSrc>::events>;
};
template <class TSrc, class TDst, class TEvent>
struct get_all_events_impl<TSrc, sm<TDst>, TEvent> {
  using type = aux::join_t<get_event<TEvent>, typename sm<TDst>::events>;
};
template <class TSrc, class TDst, class TEvent>
struct get_all_events_impl<sm<TSrc>, sm<TDst>, TEvent> {
  using type = aux::join_t<get_event<TEvent>, typename sm<TSrc>::events, typename sm<TDst>::events>;
};
template <class, class TEvent>
struct get_sub_internal_events_impl {
  using type = aux::conditional_t<aux::is_base_of<internal_event, TEvent>::value, aux::type_list<TEvent>, aux::type_list<>>;
};
template <class T, class TEvent>
struct get_sub_internal_events_impl<sm<T>, TEvent> {
  using type = aux::join_t<aux::type_list<TEvent>, typename sm_impl<T>::sub_internal_events_t>;
};
template <class... Ts>
using get_all_events =
    aux::join_t<typename get_all_events_impl<typename Ts::src_state, typename Ts::dst_state, typename Ts::event>::type...>;
template <class... Ts>
using get_sub_internal_events =
    aux::join_t<typename get_sub_internal_events_impl<typename Ts::src_state, typename Ts::event>::type...,
                typename get_sub_internal_events_impl<typename Ts::dst_state, typename Ts::event>::type...>;
template <class... Ts>
using get_events = aux::type_list<typename Ts::event...>;
template <class T>
struct get_exception : aux::type_list<> {};
template <class T>
struct get_exception<exception<T>> : aux::type_list<exception<T>> {};
template <class... Ts>
using get_exceptions = aux::join_t<typename get_exception<Ts>::type...>;
template <class... Ts>
using get_states = aux::join_t<aux::type_list<typename Ts::src_state, typename Ts::dst_state>...>;
template <class... Ts>
using get_initial_states =
    aux::join_t<typename aux::conditional<Ts::initial, aux::type_list<typename Ts::src_state>, aux::type_list<>>::type...>;
template <class... Ts>
using get_history_states = aux::join_t<
    typename aux::conditional<!Ts::history && Ts::initial, aux::type_list<typename Ts::src_state>, aux::type_list<>>::type...>;
template <class>
struct get_sub_sm : aux::type_list<> {};
template <class T>
struct get_sub_sm<sm<T>> : aux::join_t<aux::type_list<T>, typename sm<T>::state_machines> {};
template <class... Ts>
using get_sub_sms = aux::join_t<typename get_sub_sm<Ts>::type...>;
template <class... Ts>
using get_sm_t = aux::type_list<typename Ts::sm...>;
template <class... Ts>
using get_non_empty_t =
    aux::join_t<typename aux::conditional<aux::is_empty<Ts>::value, aux::type_list<>, aux::type_list<Ts>>::type...>;
template <class... Ts>
using merge_deps = aux::join_t<typename Ts::deps...>;
template <class>
struct sub_sm;
template <class T>
struct sub_sm<sm_impl<sm_policy<T>>> {
  template <class U, class... TPolicies>
  constexpr static sm_impl<sm_policy<T, aux::identity<U>, TPolicies...>> &get(
      aux::pool_type<sm_impl<sm_policy<T, aux::identity<U>, TPolicies...>>> *object) {
    return static_cast<aux::pool_type<sm_impl<sm_policy<T, aux::identity<U>, TPolicies...>>> &>(*object).value;
  }
  template <class... TPolicies>
  constexpr static sm_impl<sm_policy<T, TPolicies...>> &get(aux::pool_type<sm_impl<sm_policy<T, TPolicies...>>> *object) {
    return static_cast<aux::pool_type<sm_impl<sm_policy<T, TPolicies...>>> &>(*object).value;
  }
  template <class... TPolicies>
  constexpr static const sm_impl<sm_policy<T, TPolicies...>> &cget(const aux::pool_type<sm_impl<sm_policy<T, TPolicies...>>> *object) {
    return static_cast<const aux::pool_type<sm_impl<sm_policy<T, TPolicies...>>> &>(*object).value;
  }
};
template <class T, class U>
struct sub_sm<sm_impl<sm_policy<T, aux::identity<U>>>> {
  template <class... TPolicies>
  constexpr static sm_impl<sm_policy<T, aux::identity<U>, TPolicies...>> &get(
      aux::pool_type<sm_impl<sm_policy<T, aux::identity<U>, TPolicies...>>> *object) {
    return static_cast<aux::pool_type<sm_impl<sm_policy<T, aux::identity<U>, TPolicies...>>> &>(*object).value;
  }
  template <class... TPolicies>
  constexpr static const sm_impl<sm_policy<T, aux::identity<U>, TPolicies...>> &cget(
      const aux::pool_type<sm_impl<sm_policy<T, aux::identity<U>, TPolicies...>>> *object) {
    return static_cast<const aux::pool_type<sm_impl<sm_policy<T, aux::identity<U>, TPolicies...>>> &>(*object).value;
  }
};
template <class T, class... TPolicies>
struct rebind_impl {
  using type = sm_policy<T, TPolicies...>;
};
template <class T, class... TDetails, class... TPolicies>
struct rebind_impl<sm_policy<T, TDetails...>, TPolicies...> {
  using type = sm_policy<T, TDetails..., TPolicies...>;
};
template <class T, class... TDetails, class... TPolicies>
struct rebind_impl<sm<sm_policy<T, TDetails...>>, TPolicies...> {
  using type = sm_policy<T, TDetails..., TPolicies...>;
};
template <class, class>
struct convert_to_sm;
template <class T, class... Ts>
struct convert_to_sm<T, aux::type_list<Ts...>> {
  using type = aux::type_list<sm_impl<T>, sm_impl<typename T::template rebind<Ts>>...>;
};
}  // namespace back
namespace back {
template <class>
class sm;
template <class>
struct sm_impl;
template <class...>
struct transitions;
template <class...>
struct transitions_sub;
template <class T, class... Ts>
struct transitions<T, Ts...> {
  template <class TEvent, class SM, class TDeps, class TSubs>
  constexpr static bool execute(const TEvent &event, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &current_state) {
    if (aux::get<T>(sm.transitions_).execute(event, sm, deps, subs, current_state, typename SM::has_entry_exits{})) {
      return true;
    }
    return transitions<Ts...>::execute(event, sm, deps, subs, current_state);
  }
};
template <class T>
struct transitions<T> {
  template <class TEvent, class SM, class TDeps, class TSubs>
  constexpr static bool execute(const TEvent &event, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &current_state) {
    return aux::get<T>(sm.transitions_).execute(event, sm, deps, subs, current_state, typename SM::has_entry_exits{});
  }
};
template <>
struct transitions<aux::true_type> {
  template <class TEvent, class SM, class TDeps, class TSubs>
  static bool execute(const TEvent &event, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &current_state) {
    sm.process_internal_event(unexpected_event<TEvent>{event}, deps, subs, current_state);
    return false;
  }
};
template <>
struct transitions<aux::false_type> {
  template <class TEvent, class SM, class TDeps, class TSubs>
  constexpr static bool execute(const TEvent &, SM &, TDeps &, TSubs &, typename SM::state_t &) {
    return false;
  }
};
template <class Tsm, class T, class... Ts>
struct transitions_sub<sm<Tsm>, T, Ts...> {
  template <class TEvent, class SM, class TDeps, class TSubs>
  constexpr static bool execute(const TEvent &event, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &current_state) {
    return execute_impl(event, sm, deps, subs, current_state);
  }
  template <class, class SM, class TDeps, class TSubs>
  constexpr static bool execute(const anonymous &event, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &current_state) {
    if (sub_sm<sm_impl<Tsm>>::cget(&subs).is_terminated()) {
      return transitions<T, Ts...>::execute(event, sm, deps, subs, current_state);
    }
    return sub_sm<sm_impl<Tsm>>::get(&subs).process_internal_events(event, deps, subs);
  }
  template <class TEvent, class SM, class TDeps, class TSubs>
  constexpr static bool execute_impl(const TEvent &event, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &current_state) {
    const auto handled = sub_sm<sm_impl<Tsm>>::get(&subs).process_event(event, deps, subs);
    return handled ? handled : transitions<T, Ts...>::execute(event, sm, deps, subs, current_state);
  }
  template <class _, class TEvent, class SM, class TDeps, class TSubs>
  constexpr static bool execute_impl(const back::on_entry<_, TEvent> &event, SM &sm, TDeps &deps, TSubs &subs,
                           typename SM::state_t &current_state) {
    transitions<T, Ts...>::execute(event, sm, deps, subs, current_state);
    sub_sm<sm_impl<Tsm>>::get(&subs).process_event(event, deps, subs);
    return true;
  }
  template <class _, class TEvent, class SM, class TDeps, class TSubs>
  constexpr static bool execute_impl(const back::on_exit<_, TEvent> &event, SM &sm, TDeps &deps, TSubs &subs,
                           typename SM::state_t &current_state) {
    sub_sm<sm_impl<Tsm>>::get(&subs).process_event(event, deps, subs);
    transitions<T, Ts...>::execute(event, sm, deps, subs, current_state);
    return true;
  }
};
template <class Tsm>
struct transitions_sub<sm<Tsm>> {
  template <class TEvent, class SM, class TDeps, class TSubs>
  constexpr static bool execute(const TEvent &event, SM &, TDeps &deps, TSubs &subs, typename SM::state_t &) {
    return sub_sm<sm_impl<Tsm>>::get(&subs).process_event(event, deps, subs);
  }
  template <class, class SM, class TDeps, class TSubs>
  constexpr static bool execute(const anonymous &, SM &, TDeps &deps, TSubs &subs, typename SM::state_t &) {
    return sub_sm<sm_impl<Tsm>>::get(&subs).process_internal_events(anonymous{}, deps, subs);
  }
};
}  // namespace back
namespace back {
template <class>
class sm;
template <class>
struct state;
template <class>
struct event;
template <class...>
struct transitions;
template <class...>
struct transitions_sub;
template <class, class>
struct state_mappings;
template <class S, class... Ts>
struct state_mappings<S, aux::type_list<Ts...>> {
  using element_type = state<S>;
  using types = aux::type_list<Ts...>;
};
template <class, class>
struct event_mappings;
template <class E, class... Ts>
struct event_mappings<E, aux::inherit<Ts...>> {
  using element_type = event<E>;
  using types = aux::type_list<Ts...>;
};
template <class...>
struct unique_mappings;
template <class, class...>
struct unique_mappings_impl;
template <class... Ts>
using unique_mappings_t = typename unique_mappings<Ts...>::type;
template <class, class, class, class R>
struct get_mapping : aux::type_list<R> {};
template <class E, class T, class R>
struct get_mapping<event<E>, event<E>, T, R>
    : aux::type_list<event_mappings<E, aux::apply_t<unique_mappings_t, aux::join_t<typename R::types, typename T::types>>>> {};
template <class S, class T, class R>
struct get_mapping<state<S>, state<S>, T, R>
    : aux::type_list<state_mappings<S, aux::join_t<typename R::types, typename T::types>>> {};
template <class T, class... Ts>
struct extend_mapping : aux::join_t<typename get_mapping<typename T::element_type, typename Ts::element_type, T, Ts>::type...> {
};
template <class T, class... Ts>
using extend_mapping_t = aux::apply_t<aux::inherit, typename extend_mapping<T, Ts...>::type>;
template <bool, class, class...>
struct conditional_mapping;
template <class T1, class T2, class... Rs, class... Ts>
struct conditional_mapping<true, aux::type_wrapper<T1, aux::inherit<Rs...>>, T2, Ts...> {
  using type = unique_mappings_impl<aux::type_wrapper<aux::inherit<T1>, extend_mapping_t<T2, Rs...>>, Ts...>;
};
template <class T1, class T2, class... Rs, class... Ts>
struct conditional_mapping<false, aux::type_wrapper<T1, aux::inherit<Rs...>>, T2, Ts...> {
  using type =
      unique_mappings_impl<aux::type_wrapper<aux::inherit<T1, aux::type_wrapper<typename T2::element_type>>, aux::inherit<T2, Rs...>>, Ts...>;
};
template <class T1, class T2, class... Rs, class... Ts>
struct unique_mappings_impl<aux::type_wrapper<T1, aux::inherit<Rs...>>, T2, Ts...>
    : conditional_mapping<aux::is_base_of<aux::type_wrapper<typename T2::element_type>, T1>::value, aux::type_wrapper<T1, aux::inherit<Rs...>>,
                          T2, Ts...>::type {};
template <class T1, class Rs>
struct unique_mappings_impl<aux::type_wrapper<T1, Rs>> : aux::apply_t<aux::inherit, Rs> {};
template <class... Ts>
struct unique_mappings : unique_mappings_impl<aux::type_wrapper<aux::none_type, aux::inherit<>>, Ts...> {};
template <class T>
struct unique_mappings<T> : aux::inherit<T> {};
template <class, class...>
struct mappings;
template <class... Ts>
struct mappings<aux::pool<Ts...>>
    : unique_mappings_t<
          event_mappings<typename Ts::event, aux::inherit<state_mappings<typename Ts::src_state, aux::type_list<Ts>>>>...> {};
template <class T>
using mappings_t = typename mappings<T>::type;
template <class, class TUnexpected>
transitions<TUnexpected> get_state_mapping_impl(...);
template <class T, class, class... Ts>
transitions<Ts...> get_state_mapping_impl(state_mappings<T, aux::type_list<Ts...>> *);
template <class T, class TMappings, class TUnexpected>
struct get_state_mapping {
  using state_mapping = decltype(get_state_mapping_impl<T, TUnexpected>((TMappings *)0));
  using any_state_mapping = decltype(get_state_mapping_impl<_, TUnexpected>((TMappings *)0));
  static constexpr bool has_any_state_mapping = !aux::is_same<any_state_mapping, transitions<TUnexpected>>::value;
  struct combined_mapping {
    template <class TEvent, class TSm, class TDeps, class TSubs>
    constexpr static bool execute(const TEvent& event, TSm& sm, TDeps& deps, TSubs& subs, typename TSm::state_t& current_state) {
      return state_mapping::template execute<TEvent, TSm, TDeps, TSubs>(event, sm, deps, subs, current_state) ||
             any_state_mapping::template execute<TEvent, TSm, TDeps, TSubs>(event, sm, deps, subs, current_state);
    }
  };
  using type = aux::conditional_t<has_any_state_mapping, combined_mapping, state_mapping>;
};
template <class S>
transitions_sub<S> get_sub_state_mapping_impl(...);
template <class T, class... Ts>
transitions_sub<T, Ts...> get_sub_state_mapping_impl(state_mappings<T, aux::type_list<Ts...>> *);
template <class T, class TMappings, class TUnexpected>
struct get_state_mapping<sm<T>, TMappings, TUnexpected> {
  using sub_sm_mapping = decltype(get_sub_state_mapping_impl<sm<T>>((TMappings *)0));
  using fallback_event_mapping = decltype(get_state_mapping_impl<_, TUnexpected>((TMappings *)0));
  struct type : sub_sm_mapping {
    template <class TEvent, class TSm, class TDeps, class TSubs>
    constexpr static bool execute(const TEvent& event, TSm& sm, TDeps& deps, TSubs& subs, typename TSm::state_t& current_state) {
      return sub_sm_mapping::template execute<TEvent, TSm, TDeps, TSubs>(event, sm, deps, subs, current_state) ||
             fallback_event_mapping::template execute<TEvent, TSm, TDeps, TSubs>(event, sm, deps, subs, current_state);
    }
  };
};
template <class T, class TMappings, class TUnexpected>
using get_state_mapping_t = typename get_state_mapping<T, TMappings, TUnexpected>::type;
template <class>
transitions<aux::true_type> get_event_mapping_impl(...);
template <class T, class TMappings>
TMappings get_event_mapping_impl(event_mappings<T, TMappings> *);
template <class T, class... T1Mappings, class... T2Mappings>
unique_mappings_t<T1Mappings..., T2Mappings...> get_event_mapping_impl(event_mappings<T, aux::inherit<T1Mappings...>> *,
                                                                       event_mappings<_, aux::inherit<T2Mappings...>> *);
template <class T, class TMappings>
struct get_event_mapping_impl_helper
    : aux::conditional<aux::is_same<transitions<aux::true_type>, decltype(get_event_mapping_impl<_>((TMappings *)0))>::value,
                       decltype(get_event_mapping_impl<T>((TMappings *)0)),
                       decltype(get_event_mapping_impl<T>((TMappings *)0, (TMappings *)0))>::type {};
template <class T, class TMappings>
struct get_event_mapping_impl_helper<exception<T>, TMappings> : decltype(get_event_mapping_impl<exception<T>>((TMappings *)0)) {
};
template <class T1, class T2, class TMappings>
struct get_event_mapping_impl_helper<unexpected_event<T1, T2>, TMappings>
    : decltype(get_event_mapping_impl<unexpected_event<T1, T2>>((TMappings *)0)) {};
template <class T1, class T2, class TMappings>
struct get_event_mapping_impl_helper<on_entry<T1, T2>, TMappings>
    : decltype(get_event_mapping_impl<on_entry<T1, T2>>((TMappings *)0)) {};
template <class T1, class T2, class TMappings>
struct get_event_mapping_impl_helper<on_exit<T1, T2>, TMappings>
    : decltype(get_event_mapping_impl<on_exit<T1, T2>>((TMappings *)0)) {};
template <class T, class TMappings>
using get_event_mapping_t = get_event_mapping_impl_helper<T, TMappings>;
}  // namespace back
namespace back {
namespace policies {
struct dispatch_policy__ {};
template <class T>
struct dispatch : aux::pair<dispatch_policy__, T> {
  using type = T;
};
struct jump_table {
  template <int, class TMappings, class sm_impl, class State, class TEvent, class TDeps, class TSubs>
  constexpr static bool dispatch(sm_impl &, State &, const TEvent &, TDeps &, TSubs &, const aux::type_list<> &) {
    return false;
  }
  template <int, class TMappings, class sm_impl, class State, class TEvent, class TDeps, class TSubs, class... TStates>
  static bool dispatch(sm_impl &self, State &current_state, const TEvent &event, TDeps &deps, TSubs &subs,
                       const aux::type_list<TStates...> &) {
    using dispatch_table_t = bool (*)(const TEvent &, sm_impl &, TDeps &, TSubs &, State &);
    constexpr static dispatch_table_t dispatch_table[__BOOST_SML_ZERO_SIZE_ARRAY_CREATE(sizeof...(TStates))] = {
        &get_state_mapping_t<TStates, TMappings, typename sm_impl::has_unexpected_events>::template execute<TEvent, sm_impl,
                                                                                                            TDeps, TSubs>...};
    return dispatch_table[current_state](event, self, deps, subs, current_state);
  }
};
struct branch_stm {
  template <int, class TMappings, class sm_impl, class State, class TEvent, class TDeps, class TSubs>
  constexpr static bool dispatch(sm_impl &, State &, const TEvent &, TDeps &, TSubs &, const aux::type_list<> &) {
    return false;
  }
  template <int N, class TMappings, class sm_impl, class State, class TEvent, class TDeps, class TSubs, class TState,
            class... TStates>
  constexpr static bool dispatch(sm_impl &self, State &current_state, const TEvent &event, TDeps &deps, TSubs &subs,
                       const aux::type_list<TState, TStates...> &) {
    return current_state == N
               ? get_state_mapping_t<TState, TMappings, typename sm_impl::has_unexpected_events>::template execute<
                     TEvent, sm_impl, TDeps, TSubs>(event, self, deps, subs, current_state)
               : dispatch<N + 1, TMappings>(self, current_state, event, deps, subs, aux::type_list<TStates...>{});
  }
};
struct switch_stm {
  template <int, class TMappings, class sm_impl, class State, class TEvent, class TDeps, class TSubs>
  constexpr static bool dispatch(sm_impl &, State &, const TEvent &, TDeps &, TSubs &, const aux::type_list<> &) {
    return false;
  }
  template <int N, class TMappings, class sm_impl, class State, class TEvent, class TDeps, class TSubs, class TState,
            class... TStates>
  constexpr static bool dispatch(sm_impl &self, State &current_state, const TEvent &event, TDeps &deps, TSubs &subs,
                       const aux::type_list<TState, TStates...> &) {
    switch (current_state) {
      case N:
        return get_state_mapping_t<TState, TMappings, typename sm_impl::has_unexpected_events>::template execute<
            TEvent, sm_impl, TDeps, TSubs>(event, self, deps, subs, current_state);
      default:
        return dispatch<N + 1, TMappings>(self, current_state, event, deps, subs, aux::type_list<TStates...>{});
    }
  }
};
#if defined(__cpp_fold_expressions)
struct fold_expr {
  template <class TMappings, int... Ns, class sm_impl, class State, class TEvent, class TDeps, class TSubs, class... TStates>
  constexpr static bool dispatch_impl(sm_impl &self, State &current_state, aux::index_sequence<Ns...>, const TEvent &event, TDeps &deps,
                            TSubs &subs, const aux::type_list<TStates...> &) {
    return ((current_state == Ns
                 ? get_state_mapping_t<TStates, TMappings, typename sm_impl::has_unexpected_events>::template execute<
                       TEvent, sm_impl, TDeps, TSubs>(event, self, deps, subs, current_state)
                 : false) ||
            ...);
  }
  template <int N, class TMappings, class sm_impl, class State, class TEvent, class TDeps, class TSubs, class... TStates>
  constexpr static bool dispatch(sm_impl &self, State &current_state, const TEvent &event, TDeps &deps, TSubs &subs,
                       const aux::type_list<TStates...> &states) {
    return dispatch_impl<TMappings>(self, current_state, aux::make_index_sequence<sizeof...(TStates)>{}, event, deps, subs,
                                    states);
  }
};
#endif
}  // namespace policies
}  // namespace back
namespace back {
template <class>
class sm;
template <class, class...>
struct sm_policy;
struct no_policy;
namespace policies {
struct logger_policy__ {};
template <class T>
struct logger : aux::pair<logger_policy__, logger<T>> {
  using type = T;
};
template <class>
struct get_state_name;
template <class T>
struct get_state_name<aux::string<T>> {
  using type = aux::string<T>;
};
template <class T, class... Ts>
struct get_state_name<aux::string<sm<sm_policy<T, Ts...>>>> {
  using type = typename get_state_name<aux::string<sm_policy<T, Ts...>>>::type;
};
template <class T>
struct get_state_name<aux::string<sm_policy<T>>> {
  using type = aux::string<T>;
};
template <class T, class TName>
struct get_state_name<aux::string<sm_policy<T, TName>>> {
  using type = aux::string<T(typename TName::type)>;
};
template <class T>
using get_state_name_t = typename get_state_name<T>::type;
template <class, class TDeps, class TEvent>
constexpr void log_process_event(const aux::type_wrapper<no_policy> &, TDeps &, const TEvent &) {}
template <class SM, class TLogger, class TDeps, class TEvent>
constexpr void log_process_event(const aux::type_wrapper<TLogger> &, TDeps &deps, const TEvent &event) {
  return static_cast<aux::pool_type<TLogger &> &>(deps).value.template log_process_event<SM>(event);
}
template <class, class TDeps, class TSrcState, class TDstState>
constexpr void log_state_change(const aux::type_wrapper<no_policy> &, TDeps &, const TSrcState &, const TDstState &) {}
template <class SM, class TLogger, class TDeps, class TSrcState, class TDstState>
constexpr void log_state_change(const aux::type_wrapper<TLogger> &, TDeps &deps, const TSrcState &, const TDstState &) {
  return static_cast<aux::pool_type<TLogger &> &>(deps).value.template log_state_change<SM>(get_state_name_t<TSrcState>{},
                                                                                            get_state_name_t<TDstState>{});
}
template <class, class TDeps, class TAction, class TEvent>
constexpr void log_action(const aux::type_wrapper<no_policy> &, TDeps &, const TAction &, const TEvent &) {}
template <class SM, class TLogger, class TDeps, class TAction, class TEvent>
constexpr void log_action(const aux::type_wrapper<TLogger> &, TDeps &deps, const TAction &action, const TEvent &event) {
  return static_cast<aux::pool_type<TLogger &> &>(deps).value.template log_action<SM>(action, event);
}
template <class SM, class TLogger, class TDeps, class TAction, class TEvent>
constexpr void log_action(const aux::type_wrapper<TLogger> &, TDeps &deps, const aux::zero_wrapper<TAction> &action, const TEvent &event) {
  return static_cast<aux::pool_type<TLogger &> &>(deps).value.template log_action<SM>(action.get(), event);
}
template <class, class TDeps, class TGuard, class TEvent>
constexpr void log_guard(const aux::type_wrapper<no_policy> &, TDeps &, const TGuard &, const TEvent &, bool) {}
template <class SM, class TLogger, class TDeps, class TGuard, class TEvent>
constexpr void log_guard(const aux::type_wrapper<TLogger> &, TDeps &deps, const TGuard &guard, const TEvent &event, bool result) {
  return static_cast<aux::pool_type<TLogger &> &>(deps).value.template log_guard<SM>(guard, event, result);
}
template <class SM, class TLogger, class TDeps, class TGuard, class TEvent>
constexpr void log_guard(const aux::type_wrapper<TLogger> &, TDeps &deps, const aux::zero_wrapper<TGuard> &guard, const TEvent &event,
               bool result) {
  return static_cast<aux::pool_type<TLogger &> &>(deps).value.template log_guard<SM>(guard.get(), event, result);
}
}  // namespace policies
}  // namespace back
namespace back {
namespace policies {
struct process_queue_policy__ {};
template <template <class...> class T>
struct process_queue : aux::pair<back::policies::process_queue_policy__, process_queue<T>> {
  template <class U>
  using rebind = T<U>;
};
}  // namespace policies
}  // namespace back
namespace back {
namespace policies {
struct dont_instantiate_statemachine_class_policy__ {};
struct dont_instantiate_statemachine_class
    : aux::pair<dont_instantiate_statemachine_class_policy__, dont_instantiate_statemachine_class> {};
}  // namespace policies
}  // namespace back

namespace aux {
template <class Tsm>
struct should_not_instantiate_statemachine_class
    : integral_constant<bool, is_same<typename Tsm::dont_instantiate_statemachine_class_policy,
                                                back::policies::dont_instantiate_statemachine_class>::value> {};

template <class Tsm>
struct should_not_subclass_statemachine_class
    : integral_constant<bool, is_empty<typename Tsm::sm>::value || should_not_instantiate_statemachine_class<Tsm>::value> {};
} // namespace aux

namespace back {
namespace policies {
struct testing_policy__ {};
struct testing : aux::pair<testing_policy__, testing> {};
}  // namespace policies
}  // namespace back
namespace back {
namespace policies {
struct thread_safety_policy__ {
  constexpr auto create_lock() { return *this; }
  __BOOST_SML_ZERO_SIZE_ARRAY(aux::byte);
};
template <class TLock>
struct thread_safe : aux::pair<thread_safety_policy__, thread_safe<TLock>> {
  using type = thread_safe;
  constexpr auto create_lock() {
    struct lock_guard {
      constexpr explicit lock_guard(TLock &lock) : lock_{lock} { lock_.lock(); }
      ~lock_guard() { lock_.unlock(); }
      TLock &lock_;
    };
    return lock_guard{lock};
  }
  TLock lock{};
};
}  // namespace policies
}  // namespace back
namespace back {
struct no_policy : policies::thread_safety_policy__ {
  using type = no_policy;
  template <class>
  using rebind = no_policy;
  template <class...>
  using defer = no_policy;
  using const_iterator = no_policy;
  using flag = no_policy;
  __BOOST_SML_ZERO_SIZE_ARRAY(aux::byte);
};
template <class TDefault, class>
TDefault get_policy(...);
template <class, class T, class TPolicy>
TPolicy get_policy(aux::pair<T, TPolicy> *);
template <class SM, class... TPolicies>
struct sm_policy {
  static_assert(aux::is_same<aux::remove_reference_t<SM>, SM>::value, "SM type can't have qualifiers");
  using sm = SM;
  using thread_safety_policy =
      decltype(get_policy<no_policy, policies::thread_safety_policy__>((aux::inherit<TPolicies...> *)0));
  using defer_queue_policy = decltype(get_policy<no_policy, policies::defer_queue_policy__>((aux::inherit<TPolicies...> *)0));
  using process_queue_policy =
      decltype(get_policy<no_policy, policies::process_queue_policy__>((aux::inherit<TPolicies...> *)0));
  using logger_policy = decltype(get_policy<no_policy, policies::logger_policy__>((aux::inherit<TPolicies...> *)0));
  using testing_policy = decltype(get_policy<no_policy, policies::testing_policy__>((aux::inherit<TPolicies...> *)0));
  using dont_instantiate_statemachine_class_policy = decltype(get_policy<no_policy, policies::dont_instantiate_statemachine_class_policy__>((aux::inherit<TPolicies...> *)0));
  using default_dispatch_policy = policies::switch_stm;
  using dispatch_policy =
      decltype(get_policy<default_dispatch_policy, policies::dispatch_policy__>((aux::inherit<TPolicies...> *)0));
  template <class T>
  using rebind = typename rebind_impl<T, TPolicies...>::type;
};
}  // namespace back
namespace concepts {
struct callable_fallback {
  void operator()();
};
template <class T>
aux::false_type test_callable(aux::non_type<void (callable_fallback::*)(), &T::operator()> *);
template <class>
aux::true_type test_callable(...);
template <class, class T>
struct callable
    : decltype(test_callable<aux::inherit<aux::conditional_t<__is_class(T), T, aux::none_type>, callable_fallback>>(0)) {};
template <class T, class R, class TBase, class... TArgs>
struct callable<T, R (TBase::*)(TArgs...)> : aux::true_type {};
template <class T, class R, class TBase, class... TArgs>
struct callable<T, R (TBase::*)(TArgs...) const> : aux::true_type {};
#if defined(__cpp_noexcept_function_type)
template <class T, class R, class TBase, class... TArgs>
struct callable<T, R (TBase::*)(TArgs...) noexcept> : aux::true_type {};
template <class T, class R, class TBase, class... TArgs>
struct callable<T, R (TBase::*)(TArgs...) const noexcept> : aux::true_type {};
#endif
}  // namespace concepts
namespace concepts {
template <class T>
decltype(aux::declval<T>().operator()()) composable_impl(int);
template <class>
void composable_impl(...);
template <class T>
struct composable : aux::is<aux::pool, decltype(composable_impl<T>(0))> {};
}  // namespace concepts
#if !defined(BOOST_SML_DISABLE_EXCEPTIONS)
#if !(defined(__cpp_exceptions) || defined(__EXCEPTIONS) || defined(_CPPUNWIND))
#define BOOST_SML_DISABLE_EXCEPTIONS true
#else
#define BOOST_SML_DISABLE_EXCEPTIONS false
#endif
#endif
namespace back {
template <class Tsm>
struct sm_impl : aux::conditional_t<aux::should_not_subclass_statemachine_class<Tsm>::value, aux::none_type, typename Tsm::sm> {
  using sm_t = typename Tsm::sm;
  using thread_safety_t = typename Tsm::thread_safety_policy::type;
  template <class T>
  using defer_queue_t = typename Tsm::defer_queue_policy::template rebind<T>;
  using defer_flag_t = typename Tsm::defer_queue_policy::flag;
  template <class T>
  using process_queue_t = typename Tsm::process_queue_policy::template rebind<T>;
  using logger_t = typename Tsm::logger_policy::type;
  using dispatch_t = typename Tsm::dispatch_policy;
  using transitions_t = decltype(aux::declval<sm_t>().operator()());
  using states_t = aux::apply_t<aux::unique_t, aux::apply_t<get_states, transitions_t>>;
  using states_ids_t = aux::apply_t<aux::type_id, states_t>;
  using initial_states_t = aux::apply_t<aux::unique_t, aux::apply_t<get_initial_states, transitions_t>>;
  using initial_states_ids_t = aux::apply_t<aux::type_id, initial_states_t>;
  using history_states_t = aux::apply_t<get_history_states, transitions_t>;
  using has_history_states =
      aux::integral_constant<bool, aux::size<initial_states_t>::value != aux::size<history_states_t>::value>;
  using sub_internal_events_t = aux::apply_t<aux::unique_t, aux::apply_t<get_sub_internal_events, transitions_t>>;
  using events_t = aux::apply_t<aux::unique_t, aux::join_t<sub_internal_events_t, aux::apply_t<get_all_events, transitions_t>>>;
  using events_ids_t = aux::apply_t<aux::inherit, events_t>;
  using has_unexpected_events = typename aux::is_base_of<unexpected, aux::apply_t<aux::inherit, events_t>>::type;
  using has_entry_exits = typename aux::is_base_of<entry_exit, aux::apply_t<aux::inherit, events_t>>::type;
  using should_not_instantiate_statemachine_class_t = aux::should_not_instantiate_statemachine_class<Tsm>;
  using defer_t = defer_queue_t<aux::apply_t<queue_event, events_t>>;
  using process_t = process_queue_t<aux::apply_t<queue_event, events_t>>;
  using deps = aux::apply_t<merge_deps, transitions_t>;
  using state_t = aux::conditional_t<(aux::size<states_t>::value > 0xFF), unsigned short, aux::byte>;
  static constexpr auto regions = aux::size<initial_states_t>::value;
  static_assert(regions > 0, "At least one initial state is required");
#if !BOOST_SML_DISABLE_EXCEPTIONS
  using exceptions = aux::apply_t<aux::unique_t, aux::apply_t<get_exceptions, events_t>>;
  using has_exceptions = aux::integral_constant<bool, (aux::size<exceptions>::value > 0)>;
#endif
  struct mappings : mappings_t<transitions_t> {};
  template <class TPool>
  constexpr sm_impl(aux::init, const TPool &p) : sm_impl{p, aux::should_not_subclass_statemachine_class<Tsm>{}} {}
  template <class TPool>
  constexpr sm_impl(const TPool &p, aux::false_type) : sm_t{aux::try_get<sm_t>(&p)}, transitions_{(*this)()} {
    initialize(typename sm_impl<Tsm>::initial_states_t{});
  }

  template <class T, class TPool>
  constexpr decltype(auto) try_get_without_instantiating(const TPool &p) const {
    static_assert(!(should_not_instantiate_statemachine_class_t::value &&
              aux::would_instantiate_missing_ctor_parameter<sm_t, decltype(&p)>()),
            "When policy sml::dont_instantiate_statemachine_class is used, you have to provide a reference to an "
            "instance of the transition table type (boost::sml::sm< your_transition_table_type >) "
            "as well as a reference to instances of all sub-statemachine types as constructor parameters like this: \n"
            "boost::sml::sm< your_transition_table_type , sml::dont_instantiate_statemachine_class >{\n"
            "    your_transition_table_instance\n"
            "}"
  );

    return aux::try_get<T>(&p)();
  }

  template <class TPool>
  constexpr sm_impl(const TPool &p, aux::true_type) : transitions_{ try_get_without_instantiating<sm_t>(p) } {
    initialize(typename sm_impl<Tsm>::initial_states_t{});
  }
  template <class TEvent, class TDeps, class TSubs>
  constexpr bool process_event(const TEvent &event, TDeps &deps, TSubs &subs) {
    const auto lock = thread_safety_.create_lock();
    (void)lock;
    bool changed = false;
    state_t old = current_state_[0];
    bool handled = process_internal_events(event, deps, subs);
    bool queued_handled = true;
    do {
      do {
        while (process_internal_events(anonymous{}, deps, subs)) {
        }
        changed = (old != current_state_[0]);
        old = current_state_[0];
      } while (process_defer_events(deps, subs, changed, aux::type_wrapper<defer_queue_t<TEvent>>{}, events_t{}));
    } while (process_queued_events(deps, subs, queued_handled, aux::type_wrapper<process_queue_t<TEvent>>{}, events_t{}));
    return handled && queued_handled;
  }
  constexpr void initialize(const aux::type_list<> &) {}
  template <class TState>
  constexpr void initialize(const aux::type_list<TState> &) {
    current_state_[0] = aux::get_id<state_t, TState>((states_ids_t *)0);
  }
  template <class... TStates>
  constexpr void initialize(const aux::type_list<TStates...> &) {
    auto region = 0;
#if defined(__cpp_fold_expressions)
    ((current_state_[region++] = aux::get_id<state_t, TStates>((states_ids_t *)0)), ...);
#else
    (void)aux::swallow{0, (current_state_[region++] = aux::get_id<state_t, TStates>((states_ids_t *)0), 0)...};
#endif
  }
  template <class TDeps, class TSubs>
  constexpr void start(TDeps &deps, TSubs &subs) {
    process_event(on_entry<_, initial>{}, deps, subs);
  }
  template <class TEvent, class TDeps, class TSubs, class... Ts,
            __BOOST_SML_REQUIRES(!aux::is_base_of<get_generic_t<TEvent>, events_ids_t>::value &&
                                 !aux::is_base_of<get_mapped_t<TEvent>, events_ids_t>::value &&
                                 !aux::is_same<get_event_t<TEvent>, initial>::value)>
  constexpr bool process_internal_events(const TEvent &, TDeps &, TSubs &, Ts &&...) {
    return false;
  }
  template <class TEvent, class TDeps, class TSubs, class... Ts,
            __BOOST_SML_REQUIRES(!aux::is_base_of<get_generic_t<TEvent>, events_ids_t>::value &&
                                 !aux::is_base_of<get_mapped_t<TEvent>, events_ids_t>::value &&
                                 aux::is_same<get_event_t<TEvent>, initial>::value)>
  constexpr bool process_internal_events(const TEvent &event, TDeps &deps, TSubs &subs) {
    policies::log_process_event<sm_t>(aux::type_wrapper<logger_t>{}, deps, event);
#if BOOST_SML_DISABLE_EXCEPTIONS
    return process_event_impl<get_event_mapping_t<get_generic_t<TEvent>, mappings>>(event, deps, subs, states_t{},
                                                                                    aux::make_index_sequence<regions>{});
#else
    return process_event_except_impl<get_event_mapping_t<get_generic_t<TEvent>, mappings>>(event, deps, subs, has_exceptions{});
#endif
  }
  template <class TEvent, class TDeps, class TSubs,
            __BOOST_SML_REQUIRES(aux::is_base_of<get_generic_t<TEvent>, events_ids_t>::value &&
                                 !aux::is_base_of<get_mapped_t<TEvent>, events_ids_t>::value)>
  constexpr bool process_internal_events(const TEvent &event, TDeps &deps, TSubs &subs) {
    policies::log_process_event<sm_t>(aux::type_wrapper<logger_t>{}, deps, event);
#if BOOST_SML_DISABLE_EXCEPTIONS
    return process_event_impl<get_event_mapping_t<get_generic_t<TEvent>, mappings>>(event, deps, subs, states_t{},
                                                                                    aux::make_index_sequence<regions>{});
#else
    return process_event_except_impl<get_event_mapping_t<get_generic_t<TEvent>, mappings>>(event, deps, subs, has_exceptions{});
#endif
  }
  template <class TEvent, class TDeps, class TSubs,
            __BOOST_SML_REQUIRES(aux::is_base_of<get_mapped_t<TEvent>, events_ids_t>::value)>
  constexpr bool process_internal_events(const TEvent &event, TDeps &deps, TSubs &subs) {
    policies::log_process_event<sm_t>(aux::type_wrapper<logger_t>{}, deps, event);
#if BOOST_SML_DISABLE_EXCEPTIONS
    return process_event_impl<get_event_mapping_t<get_mapped_t<TEvent>, mappings>>(event, deps, subs, states_t{},
                                                                                   aux::make_index_sequence<regions>{});
#else
    return process_event_except_impl<get_event_mapping_t<get_mapped_t<TEvent>, mappings>>(event, deps, subs, has_exceptions{});
#endif
  }
  template <class TEvent, class TDeps, class TSubs, class... Ts,
            __BOOST_SML_REQUIRES(!aux::is_base_of<get_generic_t<TEvent>, events_ids_t>::value &&
                                 !aux::is_base_of<get_mapped_t<TEvent>, events_ids_t>::value)>
  constexpr bool process_internal_event(const TEvent &, TDeps &, TSubs &, Ts &&...) {
    return false;
  }
  template <class TEvent, class TDeps, class TSubs,
            __BOOST_SML_REQUIRES(!aux::is_base_of<get_generic_t<TEvent>, events_ids_t>::value)>
  constexpr bool process_internal_generic_event(const TEvent &, TDeps &, TSubs &, state_t &) {
    return false;
  }
  template <class TEvent, class TDeps, class TSubs,
            __BOOST_SML_REQUIRES(aux::is_base_of<get_generic_t<TEvent>, events_ids_t>::value)>
  constexpr bool process_internal_generic_event(const TEvent &event, TDeps &deps, TSubs &subs, state_t &current_state) {
    policies::log_process_event<sm_t>(aux::type_wrapper<logger_t>{}, deps, event);
#if BOOST_SML_DISABLE_EXCEPTIONS
    return process_event_impl<get_event_mapping_t<get_generic_t<TEvent>, mappings>>(event, deps, subs, states_t{},
                                                                                    current_state);
#else
    return process_event_except_impl<get_event_mapping_t<get_generic_t<TEvent>, mappings>>(event, deps, subs, current_state,
                                                                                          has_exceptions{});
#endif
  }
  template <class TEvent, class TDeps, class TSubs,
            __BOOST_SML_REQUIRES(aux::is_base_of<get_generic_t<TEvent>, events_ids_t>::value &&
                                 !aux::is_base_of<get_mapped_t<TEvent>, events_ids_t>::value)>
  constexpr bool process_internal_event(const TEvent &event, TDeps &deps, TSubs &subs, state_t &current_state) {
    return process_internal_generic_event(event, deps, subs, current_state);
  }
  template <class TEvent, class TDeps, class TSubs,
            __BOOST_SML_REQUIRES(aux::is_base_of<get_mapped_t<TEvent>, events_ids_t>::value)>
  constexpr bool process_internal_event(const TEvent &event, TDeps &deps, TSubs &subs, state_t &current_state) {
    policies::log_process_event<sm_t>(aux::type_wrapper<logger_t>{}, deps, event);
#if BOOST_SML_DISABLE_EXCEPTIONS
    return process_event_impl<get_event_mapping_t<get_mapped_t<TEvent>, mappings>>(event, deps, subs, states_t{}, current_state)
#else
    return process_event_except_impl<get_event_mapping_t<get_mapped_t<TEvent>, mappings>>(event, deps, subs, current_state,
                                                                                         has_exceptions{})
#endif
           || process_internal_generic_event(event, deps, subs, current_state);
  }
  template <class TMappings, class TEvent, class TDeps, class TSubs, class... TStates>
  constexpr bool process_event_impl(const TEvent &event, TDeps &deps, TSubs &subs, const aux::type_list<TStates...> &states,
                          aux::index_sequence<0>) {
    return dispatch_t::template dispatch<0, TMappings>(*this, current_state_[0], event, deps, subs, states);
  }
  template <class TMappings, class TEvent, class TDeps, class TSubs, class... TStates, int... Ns>
  constexpr bool process_event_impl(const TEvent &event, TDeps &deps, TSubs &subs, const aux::type_list<TStates...> &states,
                          aux::index_sequence<Ns...>) {
    auto handled = false;
#if defined(__cpp_fold_expressions)
    ((handled |= dispatch_t::template dispatch<0, TMappings>(*this, current_state_[Ns], event, deps, subs, states)), ...);
#else
    (void)aux::swallow{
        0,
        (handled |= dispatch_t::template dispatch<0, TMappings>(*this, current_state_[Ns], event, deps, subs, states), 0)...};
#endif
    return handled;
  }
  template <class TMappings, class TEvent, class TDeps, class TSubs, class... TStates>
  constexpr bool process_event_impl(const TEvent &event, TDeps &deps, TSubs &subs, const aux::type_list<TStates...> &states,
                          state_t &current_state) {
    return dispatch_t::template dispatch<0, TMappings>(*this, current_state, event, deps, subs, states);
  }
#if !BOOST_SML_DISABLE_EXCEPTIONS
  template <class TMappings, class TEvent, class TDeps, class TSubs>
  constexpr bool process_event_except_impl(const TEvent &event, TDeps &deps, TSubs &subs, aux::false_type) {
    return process_event_impl<TMappings>(event, deps, subs, states_t{}, aux::make_index_sequence<regions>{});
  }
  template <class TMappings, class TEvent, class TDeps, class TSubs>
  constexpr bool process_event_except_impl(const TEvent &event, TDeps &deps, TSubs &subs, state_t &current_state, aux::false_type) {
    return process_event_impl<TMappings>(event, deps, subs, states_t{}, current_state);
  }
  template <class TMappings, class TEvent, class TDeps, class TSubs>
  bool process_event_except_impl(const TEvent &event, TDeps &deps, TSubs &subs, state_t &current_state,
                                aux::true_type) noexcept {
    try {
      return process_event_impl<TMappings>(event, deps, subs, states_t{}, current_state);
    } catch (...) {
      return process_exception(deps, subs, exceptions{});
    }
  }
  template <class TMappings, class TEvent, class TDeps, class TSubs>
  bool process_event_except_impl(const TEvent &event, TDeps &deps, TSubs &subs, aux::true_type) {
    try {
      return process_event_impl<TMappings>(event, deps, subs, states_t{}, aux::make_index_sequence<regions>{});
    } catch (...) {
      return process_exception(deps, subs, exceptions{});
    }
  }
  template <class TDeps, class TSubs>
  constexpr bool process_exception(TDeps &deps, TSubs &subs, const aux::type_list<> &) {
    return process_internal_events(exception<_>{}, deps, subs);
  }
  template <class TDeps, class TSubs, class E, class... Es>
  bool process_exception(TDeps &deps, TSubs &subs, const aux::type_list<E, Es...> &) {
    try {
      throw;
    } catch (const typename E::type &e) {
      return process_internal_events(E{e}, deps, subs);
    } catch (...) {
      return process_exception(deps, subs, aux::type_list<Es...>{});
    }
  }
#endif
  template <class TDeps, class TSubs, class... TEvents>
  constexpr bool process_defer_events(TDeps &, TSubs &, const bool, const aux::type_wrapper<no_policy> &, const aux::type_list<TEvents...> &) {
    return false;
  }
  template <class TDeps, class TSubs, class TEvent>
  constexpr bool process_event_no_defer(TDeps &deps, TSubs &subs, const void *data) {
    const auto &event = *static_cast<const TEvent *>(data);
    bool handled = process_internal_events(event, deps, subs);
    if (handled && defer_again_) {
      ++defer_it_;
    } else {
      defer_it_ = defer_.erase(defer_it_);
      defer_end_ = defer_.end();
    }
    return handled;
  }
  template <class TDeps, class TSubs, class TDeferQueue, class... TEvents>
  bool process_defer_events(TDeps &deps, TSubs &subs, const bool handled, const aux::type_wrapper<TDeferQueue> &,
                            const aux::type_list<TEvents...> &) {
    bool processed_events = false;
    if (handled) {
      using dispatch_table_t = bool (sm_impl::*)(TDeps &, TSubs &, const void *);
      const static dispatch_table_t dispatch_table[__BOOST_SML_ZERO_SIZE_ARRAY_CREATE(sizeof...(TEvents))] = {
          &sm_impl::process_event_no_defer<TDeps, TSubs, TEvents>...};
      defer_processing_ = true;
      defer_again_ = false;
      defer_it_ = defer_.begin();
      defer_end_ = defer_.end();
      state_t old = current_state_[0];
      while (defer_it_ != defer_end_) {
        processed_events |= (this->*dispatch_table[defer_it_->id])(deps, subs, defer_it_->data);
        defer_again_ = false;
        if (old != current_state_[0]) {
          defer_it_ = defer_.begin();
          old = current_state_[0];
        }
      }
      defer_processing_ = false;
    }
    return processed_events;
  }
  template <class TDeps, class TSubs, class... TEvents>
  constexpr bool process_queued_events(TDeps &, TSubs &,  bool &, const aux::type_wrapper<no_policy> &, const aux::type_list<TEvents...> &) {
    return false;
  }
  template <class TDeps, class TSubs, class TEvent>
  constexpr bool process_event_no_queue(TDeps &deps, TSubs &subs, const void *data) {
    const auto &event = *static_cast<const TEvent *>(data);
    policies::log_process_event<sm_t>(aux::type_wrapper<logger_t>{}, deps, event);
#if BOOST_SML_DISABLE_EXCEPTIONS
    return process_event_impl<get_event_mapping_t<TEvent, mappings>>(event, deps, subs, states_t{},
                                                                     aux::make_index_sequence<regions>{});
#else
    return process_event_except_impl<get_event_mapping_t<TEvent, mappings>>(event, deps, subs, has_exceptions{});
#endif
  }
  template <class TDeps, class TSubs, class TDeferQueue, class... TEvents>
  bool process_queued_events(TDeps &deps, TSubs &subs, bool &queued_handled, const aux::type_wrapper<TDeferQueue> &, const aux::type_list<TEvents...> &) {
    using dispatch_table_t = bool (sm_impl::*)(TDeps &, TSubs &, const void *);
    const static dispatch_table_t dispatch_table[__BOOST_SML_ZERO_SIZE_ARRAY_CREATE(sizeof...(TEvents))] = {
        &sm_impl::process_event_no_queue<TDeps, TSubs, TEvents>...};
    bool wasnt_empty = !process_.empty();
    while (!process_.empty()) {
      queued_handled &= (this->*dispatch_table[process_.front().id])(deps, subs, process_.front().data);
      process_.pop();
    }
    return wasnt_empty;
  }
  template <class TVisitor, class... TStates>
  constexpr void visit_current_states(const TVisitor &visitor, const aux::type_list<TStates...> &, aux::index_sequence<0>) const {
    using dispatch_table_t = void (*)(const TVisitor &);
    const dispatch_table_t dispatch_table[__BOOST_SML_ZERO_SIZE_ARRAY_CREATE(sizeof...(TStates))] = {
        &sm_impl::visit_state<TVisitor, TStates>...};
    dispatch_table[current_state_[0]](visitor);
  }
  template <class TVisitor, class... TStates, int... Ns>
  constexpr void visit_current_states(const TVisitor &visitor, const aux::type_list<TStates...> &, aux::index_sequence<Ns...>) const {
    using dispatch_table_t = void (*)(const TVisitor &);
    const dispatch_table_t dispatch_table[__BOOST_SML_ZERO_SIZE_ARRAY_CREATE(sizeof...(TStates))] = {
        &sm_impl::visit_state<TVisitor, TStates>...};
#if defined(__cpp_fold_expressions)
    (dispatch_table[current_state_[Ns]](visitor), ...);
#else
    (void)aux::swallow{0, (dispatch_table[current_state_[Ns]](visitor), 0)...};
#endif
  }
  template <class TVisitor, class TState>
  constexpr static void visit_state(const TVisitor &visitor) {
    visitor(aux::string<TState>{});
  }
  constexpr bool is_terminated() const { return is_terminated_impl(aux::make_index_sequence<regions>{}); }
  constexpr bool is_terminated_impl(aux::index_sequence<0>) const {
    return current_state_[0] == aux::get_id<state_t, terminate_state>((states_ids_t *)0);
  }
  template <int... Ns>
  constexpr bool is_terminated_impl(aux::index_sequence<Ns...>) const {
#if defined(__cpp_fold_expressions)
    return ((current_state_[Ns] == aux::get_id<state_t, terminate_state>((states_ids_t *)0)) && ...);
#else
    auto result = true;
    (void)aux::swallow{0, (result &= current_state_[Ns] == aux::get_id<state_t, terminate_state>((states_ids_t *)0))...};
    return result;
#endif
  }
  transitions_t transitions_{};
  state_t current_state_[regions]{};
  thread_safety_t thread_safety_{};
  defer_t defer_{};
  process_t process_{};
  defer_flag_t defer_processing_ = defer_flag_t{};
  defer_flag_t defer_again_ = defer_flag_t{};
  typename defer_t::const_iterator defer_it_{};
  typename defer_t::const_iterator defer_end_{};
};
template <class Tsm>
class sm {
  using sm_t = typename Tsm::sm;
  using logger_t = typename Tsm::logger_policy::type;
  using logger_dep_t =
      aux::conditional_t<aux::is_same<no_policy, logger_t>::value, aux::type_list<>, aux::type_list<logger_t &>>;
  using transitions_t = decltype(aux::declval<sm_t>().operator()());
  static_assert(concepts::composable<sm_t>::value, "Composable constraint is not satisfied!");

 public:
  using states = aux::apply_t<aux::unique_t, aux::apply_t<get_states, transitions_t>>;
  using state_machines = aux::apply_t<get_sub_sms, states>;
  using events = aux::apply_t<aux::unique_t, aux::apply_t<get_all_events, transitions_t>>;
  using transitions = aux::apply_t<aux::type_list, transitions_t>;

 private:
  using sm_all_t = aux::apply_t<get_non_empty_t, aux::join_t<
      aux::conditional_t<
            aux::is_same<no_policy, typename Tsm::dont_instantiate_statemachine_class_policy>::value,
            aux::type_list<sm_t>,
            aux::none_type>,
      aux::apply_t<get_sm_t, state_machines>>>;

  using sub_sms_t =
      aux::apply_t<aux::pool,
                   typename convert_to_sm<Tsm, aux::apply_t<aux::unique_t, aux::apply_t<get_sub_sms, states>>>::type>;
  using deps = aux::apply_t<merge_deps, transitions_t>;
  using deps_t =
      aux::apply_t<aux::pool,
                   aux::apply_t<aux::unique_t, aux::join_t<deps, sm_all_t, logger_dep_t, aux::apply_t<merge_deps, sub_sms_t>>>>;
  struct events_ids : aux::apply_t<aux::inherit, events> {};

 public:
  constexpr sm() : deps_{aux::init{}, aux::pool<>{}}, sub_sms_{aux::pool<>{}} { aux::get<sm_impl<Tsm>>(sub_sms_).start(deps_, sub_sms_); }
  template <class TDeps, __BOOST_SML_REQUIRES(!aux::is_same<aux::remove_reference_t<TDeps>, sm>::value)>
  constexpr explicit sm(TDeps &&deps) : deps_{aux::init{}, aux::pool<TDeps>{deps}}, sub_sms_{aux::pool<TDeps>{deps}} {
    aux::get<sm_impl<Tsm>>(sub_sms_).start(deps_, sub_sms_);
  }
  template <class... TDeps, __BOOST_SML_REQUIRES((sizeof...(TDeps) > 1) && aux::is_unique_t<TDeps...>::value)>
  constexpr explicit sm(TDeps &&... deps) : deps_{aux::init{}, aux::pool<TDeps...>{deps...}}, sub_sms_{aux::pool<TDeps...>{deps...}} {
    aux::get<sm_impl<Tsm>>(sub_sms_).start(deps_, sub_sms_);
  }
  constexpr sm(aux::init, deps_t &deps) : deps_{deps}, sub_sms_{deps} { aux::get<sm_impl<Tsm>>(sub_sms_).start(deps_, sub_sms_); }
  constexpr sm(const sm &) = default;
  constexpr sm(sm &&) = default;
  constexpr sm &operator=(const sm &) = default;
  constexpr sm &operator=(sm &&) = default;
  template <class TEvent, __BOOST_SML_REQUIRES(aux::is_base_of<TEvent, events_ids>::value)>
  constexpr bool process_event(const TEvent &event) {
    return aux::get<sm_impl<Tsm>>(sub_sms_).process_event(event, deps_, sub_sms_);
  }
  template <class TEvent, __BOOST_SML_REQUIRES(!aux::is_base_of<TEvent, events_ids>::value)>
  constexpr bool process_event(const TEvent &event) {
    return aux::get<sm_impl<Tsm>>(sub_sms_).process_event(unexpected_event<_, TEvent>{event}, deps_, sub_sms_);
  }
  template <class T = aux::identity<sm_t>, class TVisitor, __BOOST_SML_REQUIRES(concepts::callable<void, TVisitor>::value)>
  constexpr void visit_current_states(const TVisitor &visitor) const {
    using type = typename T::type;
    using sm_impl_t = sm_impl<typename Tsm::template rebind<type>>;
    using states_t = typename sm_impl_t::states_t;
    constexpr auto regions = sm_impl_t::regions;
    aux::cget<sm_impl_t>(sub_sms_).visit_current_states(visitor, states_t{}, aux::make_index_sequence<regions>{});
  }
  template <class T = aux::identity<sm_t>, class TState,
            __BOOST_SML_REQUIRES(sm_impl<typename Tsm::template rebind<typename T::type>>::regions == 1)>
  constexpr bool is(const TState &) const {
    using type = typename T::type;
    using sm_impl_t = sm_impl<typename Tsm::template rebind<type>>;
    using state_t = typename sm_impl_t::state_t;
    using states_ids_t = typename sm_impl_t::states_ids_t;
    return aux::get_id<state_t, typename TState::type>((states_ids_t *)0) == aux::cget<sm_impl_t>(sub_sms_).current_state_[0];
  }
  template <class T = aux::identity<sm_t>, class TState,
            __BOOST_SML_REQUIRES(sm_impl<typename Tsm::template rebind<typename T::type>>::regions != 1)>
  constexpr bool is(const TState &) const {
    using type = typename T::type;
    using sm_impl_t = sm_impl<typename Tsm::template rebind<type>>;
    using state_t = typename sm_impl_t::state_t;
    using states_ids_t = typename sm_impl_t::states_ids_t;
    auto result = false;
    visit_current_states<T>([&](auto state) {
      (void)state;
      result |= (aux::get_id<state_t, typename TState::type>((states_ids_t *)0) ==
                 aux::get_id<state_t, typename decltype(state)::type>((states_ids_t *)0));
    });
    return result;
  }
  template <class T = aux::identity<sm_t>, template <class...> class TState>
  constexpr bool is(const TState<terminate_state> &) const {
    using type = typename T::type;
    using sm_impl_t = sm_impl<typename Tsm::template rebind<type>>;
    using state_t = typename sm_impl_t::state_t;
    using states_ids_t = typename sm_impl_t::states_ids_t;
    auto result = false;
    visit_current_states<T>([&](auto state) {
      (void)state;
      result |= (aux::get_id<state_t, terminate_state>((states_ids_t *)0) ==
                 aux::get_id<state_t, typename decltype(state)::type>((states_ids_t *)0));
    });
    return result;
  }
  template <class T = aux::identity<sm_t>, class... TStates,
            __BOOST_SML_REQUIRES(sizeof...(TStates) == sm_impl<typename Tsm::template rebind<typename T::type>>::regions)>
  constexpr bool is(const TStates &...) const {
    using type = typename T::type;
    using sm_impl_t = sm_impl<typename Tsm::template rebind<type>>;
    using states_ids_t = typename sm_impl_t::states_ids_t;
    using state_t = typename sm_impl_t::state_t;
    auto result = true;
    auto i = 0;
    state_t state_ids[] = {aux::get_id<state_t, typename TStates::type>((states_ids_t *)0)...};
    visit_current_states<T>([&](auto state) {
      (void)state;
      result &= (aux::get_id<state_t, typename decltype(state)::type>((states_ids_t *)0) == state_ids[i++]);
    });
    return result;
  }
  template <class T = aux::identity<sm_t>, class... TStates,
            __BOOST_SML_REQUIRES(!aux::is_same<no_policy, typename Tsm::testing_policy>::value && aux::always<T>::value)>
  constexpr void set_current_states(const TStates &...) {
    using type = typename T::type;
    using sm_impl_t = sm_impl<typename Tsm::template rebind<type>>;
    using states_ids_t = typename sm_impl_t::states_ids_t;
    using state_t = typename sm_impl_t::state_t;
    auto &sm = aux::get<sm_impl_t>(sub_sms_);
    auto region = 0;
#if defined(__cpp_fold_expressions)
    ((sm.current_state_[region++] = aux::get_id<state_t, typename TStates::type>((states_ids_t *)0)), ...);
#else
    (void)aux::swallow{0,
                       (sm.current_state_[region++] = aux::get_id<state_t, typename TStates::type>((states_ids_t *)0), 0)...};
#endif
  }
  template <class T>
  constexpr operator T &() {
    return aux::get<sm_impl<typename Tsm::template rebind<T>>>(sub_sms_);
  }
  template <class T>
  constexpr operator const T &() {
    return aux::cget<sm_impl<typename Tsm::template rebind<T>>>(sub_sms_);
  }

 private:
  deps_t deps_;
  sub_sms_t sub_sms_;
};
}  // namespace back
namespace front {
struct operator_base {};
struct action_base {};
template <class TRootSM, class... TSubSMs>
TRootSM get_root_sm_impl(aux::pool<TRootSM, TSubSMs...> *);
template <class TSubs>
using get_root_sm_t = decltype(get_root_sm_impl((TSubs *)0));
template <class, class>
aux::type_list<action_base> args1__(...);
template <class T, class E>
auto args1__(int) -> aux::function_traits_t<decltype(&T::operator())>;
template <class T, class E>
auto args__(int) -> aux::function_traits_t<decltype(&T::__BOOST_SML_TEMPLATE_KEYWORD operator()<back::get_event_t<E>>)>;
template <class T, class E>
auto args__(...) -> decltype(args1__<T, E>(0));
template <class T, class E>
using args_t = decltype(args__<T, E>(0));
template <class T, class TEvent, class Tsm, class TDeps>
constexpr decltype(auto) get_arg(const aux::type_wrapper<T> &, const TEvent &, Tsm &, TDeps &deps) {
  return aux::get<T>(deps);
}
template <class TEvent, class Tsm, class TDeps>
constexpr decltype(auto) get_arg(const aux::type_wrapper<TEvent> &, const TEvent &event, Tsm &, TDeps &) {
  return event;
}
template <class TEvent, class Tsm, class TDeps>
constexpr decltype(auto) get_arg(const aux::type_wrapper<const TEvent &> &, const TEvent &event, Tsm &, TDeps &) {
  return event;
}
template <class T, class TEvent, class Tsm, class TDeps>
constexpr decltype(auto) get_arg(const aux::type_wrapper<const TEvent &> &, const back::unexpected_event<T, TEvent> &event, Tsm &, TDeps &) {
  return event.event_;
}
template <class T, class TEvent, class Tsm, class TDeps>
constexpr decltype(auto) get_arg(const aux::type_wrapper<const TEvent &> &, const back::on_entry<T, TEvent> &event, Tsm &, TDeps &) {
  return event.event_;
}
template <class T, class TEvent, class Tsm, class TDeps>
constexpr decltype(auto) get_arg(const aux::type_wrapper<const TEvent &> &, const back::on_exit<T, TEvent> &event, Tsm &, TDeps &) {
  return event.event_;
}
template <class T, class TEvent, class Tsm, class TDeps>
constexpr decltype(auto) get_arg(const aux::type_wrapper<const TEvent &> &, const back::exception<T, TEvent> &event, Tsm &, TDeps &) {
  return event.exception_;
}
template <class... TEvents, class TEvent, class Tsm, class TDeps>
constexpr decltype(auto) get_arg(const aux::type_wrapper<back::defer<TEvents...>> &, const TEvent, Tsm &sm, TDeps &) {
  return back::defer<TEvents...>{sm.defer_};
}
template <class... TEvents, class TEvent, class Tsm, class TDeps>
constexpr decltype(auto) get_arg(const aux::type_wrapper<back::process<TEvents...>> &, const TEvent, Tsm &sm, TDeps &) {
  return back::process<TEvents...>{sm.process_};
}
template <class, class, class>
struct call;
template <class TEvent>
struct call<TEvent, aux::type_list<>, back::no_policy> {
  template <class T, class Tsm, class TDeps, class TSubs>
  constexpr static auto execute(T object, const TEvent &, Tsm &, TDeps &, TSubs &) {
    return object();
  }
};
template <class TEvent, class TLogger>
struct call<TEvent, aux::type_list<>, TLogger> {
  template <class T, class Tsm, class TDeps, class TSubs>
  constexpr static auto execute(T object, const TEvent &event, Tsm &, TDeps &deps, TSubs &) {
    using result_type = decltype(object());
    return execute_impl<typename Tsm::sm_t>(aux::type_wrapper<result_type>{}, object, event, deps);
  }
  template <class Tsm, class T, class TDeps>
  constexpr static auto execute_impl(const aux::type_wrapper<bool> &, T object, const TEvent &event, TDeps &deps) {
    const auto result = object();
    back::policies::log_guard<Tsm>(aux::type_wrapper<TLogger>{}, deps, object, event, result);
    return result;
  }
  template <class Tsm, class T, class TDeps>
  constexpr static auto execute_impl(const aux::type_wrapper<void> &, T object, const TEvent &event, TDeps &deps) {
    back::policies::log_action<Tsm>(aux::type_wrapper<TLogger>{}, deps, object, event);
    object();
  }
};
template <class TEvent>
struct call<TEvent, aux::type_list<TEvent>, back::no_policy> {
  template <class T, class Tsm, class TDeps, class TSubs>
  constexpr static auto execute(T object, const TEvent &event, Tsm &, TDeps &, TSubs &) {
    return object(event);
  }
};
template <class TEvent, class TLogger>
struct call<TEvent, aux::type_list<TEvent>, TLogger> {
  template <class T, class Tsm, class TDeps, class TSubs>
  constexpr static auto execute(T object, const TEvent &event, Tsm &, TDeps &deps, TSubs &) {
    using result_type = decltype(object(event));
    return execute_impl<typename Tsm::sm_t>(aux::type_wrapper<result_type>{}, object, event, deps);
  }
  template <class Tsm, class T, class TDeps>
  constexpr static auto execute_impl(const aux::type_wrapper<bool> &, T object, const TEvent &event, TDeps &deps) {
    const auto result = object(event);
    back::policies::log_guard<Tsm>(aux::type_wrapper<TLogger>{}, deps, object, event, result);
    return result;
  }
  template <class Tsm, class T, class TDeps>
  constexpr static auto execute_impl(const aux::type_wrapper<void> &, T object, const TEvent &event, TDeps &deps) {
    back::policies::log_action<Tsm>(aux::type_wrapper<TLogger>{}, deps, object, event);
    object(event);
  }
};
template <class TEvent>
struct call<TEvent, aux::type_list<action_base>, back::no_policy> {
  template <class T, class Tsm, class TDeps, class TSubs>
  static auto execute(T object, const TEvent &event, Tsm &sm, TDeps &deps, TSubs &subs) {
    return object(event, sm, deps, subs);
  }
};
template <class TEvent, class TLogger>
struct call<TEvent, aux::type_list<action_base>, TLogger> {
  template <class T, class Tsm, class TDeps, class TSubs>
  constexpr static auto execute(T object, const TEvent &event, Tsm &sm, TDeps &deps, TSubs &subs) {
    return object(event, sm, deps, subs);
  }
};
template <class TEvent, class... Ts>
struct call<TEvent, aux::type_list<Ts...>, back::no_policy> {
  template <class T, class Tsm, class TDeps, class TSubs>
  constexpr static auto execute(T object, const TEvent &event, Tsm &sm, TDeps &deps, TSubs &) {
    return object(get_arg(aux::type_wrapper<Ts>{}, event, sm, deps)...);
  }
};
template <class TEvent, class... Ts, class TLogger>
struct call<TEvent, aux::type_list<Ts...>, TLogger> {
  template <class T, class Tsm, class TDeps, class TSubs>
  constexpr static auto execute(T object, const TEvent &event, Tsm &sm, TDeps &deps, TSubs &) {
    using result_type = decltype(object(get_arg(aux::type_wrapper<Ts>{}, event, sm, deps)...));
    return execute_impl<typename Tsm::sm_t>(aux::type_wrapper<result_type>{}, object, event, sm, deps);
  }
  template <class Tsm, class T, class SM, class TDeps>
  constexpr static auto execute_impl(const aux::type_wrapper<bool> &, T object, const TEvent &event, SM &sm, TDeps &deps) {
    const auto result = object(get_arg(aux::type_wrapper<Ts>{}, event, sm, deps)...);
    back::policies::log_guard<Tsm>(aux::type_wrapper<TLogger>{}, deps, object, event, result);
    return result;
  }
  template <class Tsm, class T, class SM, class TDeps>
  constexpr static auto execute_impl(const aux::type_wrapper<void> &, T object, const TEvent &event, SM &sm, TDeps &deps) {
    back::policies::log_action<Tsm>(aux::type_wrapper<TLogger>{}, deps, object, event);
    object(get_arg(aux::type_wrapper<Ts>{}, event, sm, deps)...);
  }
};
template <class... Ts>
class seq_ : operator_base {
 public:
  constexpr explicit seq_(Ts... ts) : a(ts...) {}
  template <class TEvent, class Tsm, class TDeps, class TSubs>
  constexpr void operator()(const TEvent &event, Tsm &sm, TDeps &deps, TSubs &subs) {
    for_all(aux::make_index_sequence<sizeof...(Ts)>{}, event, sm, deps, subs);
  }

 private:
  template <int... Ns, class TEvent, class Tsm, class TDeps, class TSubs>
  constexpr void for_all(const aux::index_sequence<Ns...> &, const TEvent &event, Tsm &sm, TDeps &deps, TSubs &subs) {
#if defined(__cpp_fold_expressions)
    (call<TEvent, args_t<Ts, TEvent>, typename Tsm::logger_t>::execute(aux::get_by_id<Ns>(&a), event, sm, deps, subs), ...);
#else
    (void)aux::swallow{
        0, (call<TEvent, args_t<Ts, TEvent>, typename Tsm::logger_t>::execute(aux::get_by_id<Ns>(&a), event, sm, deps, subs),
            0)...};
#endif
  }
  aux::tuple<Ts...> a;
};
template <class... Ts>
class and_ : operator_base {
 public:
  constexpr explicit and_(Ts... ts) : g(ts...) {}
  template <class TEvent, class Tsm, class TDeps, class TSubs>
  constexpr auto operator()(const TEvent &event, Tsm &sm, TDeps &deps, TSubs &subs) {
    return for_all(aux::make_index_sequence<sizeof...(Ts)>{}, event, sm, deps, subs);
  }

 private:
  template <int... Ns, class TEvent, class Tsm, class TDeps, class TSubs>
  constexpr auto for_all(const aux::index_sequence<Ns...> &, const TEvent &event, Tsm &sm, TDeps &deps, TSubs &subs) {
#if defined(__cpp_fold_expressions)
    return (call<TEvent, args_t<Ts, TEvent>, typename Tsm::logger_t>::execute(aux::get_by_id<Ns>(&g), event, sm, deps, subs) &&
            ...);
#else
    auto result = true;
    (void)aux::swallow{0, (result = result && call<TEvent, args_t<Ts, TEvent>, typename Tsm::logger_t>::execute(
                                                  aux::get_by_id<Ns>(&g), event, sm, deps, subs),
                           0)...};
    return result;
#endif
  }
  aux::tuple<Ts...> g;
};
template <class... Ts>
class or_ : operator_base {
 public:
  constexpr explicit or_(Ts... ts) : g(ts...) {}
  template <class TEvent, class Tsm, class TDeps, class TSubs>
  constexpr auto operator()(const TEvent &event, Tsm &sm, TDeps &deps, TSubs &subs) {
    return for_all(aux::make_index_sequence<sizeof...(Ts)>{}, event, sm, deps, subs);
  }

 private:
  template <int... Ns, class TEvent, class Tsm, class TDeps, class TSubs>
  constexpr auto for_all(const aux::index_sequence<Ns...> &, const TEvent &event, Tsm &sm, TDeps &deps, TSubs &subs) {
#if defined(__cpp_fold_expressions)
    return (call<TEvent, args_t<Ts, TEvent>, typename Tsm::logger_t>::execute(aux::get_by_id<Ns>(&g), event, sm, deps, subs) ||
            ...);
#else
    auto result = false;
    (void)aux::swallow{0, (result = result || call<TEvent, args_t<Ts, TEvent>, typename Tsm::logger_t>::execute(
                                                  aux::get_by_id<Ns>(&g), event, sm, deps, subs),
                           0)...};
    return result;
#endif
  }
  aux::tuple<Ts...> g;
};
template <class T>
class not_ : operator_base {
 public:
  constexpr explicit not_(T t) : g(t) {}
  template <class TEvent, class Tsm, class TDeps, class TSubs>
  constexpr auto operator()(const TEvent &event, Tsm &sm, TDeps &deps, TSubs &subs) {
    return !call<TEvent, args_t<T, TEvent>, typename Tsm::logger_t>::execute(g, event, sm, deps, subs);
  }

 private:
  T g;
};
}  // namespace front
template <class T, __BOOST_SML_REQUIRES(concepts::callable<bool, T>::value)>
constexpr auto operator!(const T &t) {
  return front::not_<aux::zero_wrapper<T>>(aux::zero_wrapper<T>{t});
}
template <class T1, class T2, __BOOST_SML_REQUIRES(concepts::callable<bool, T1>::value &&concepts::callable<bool, T2>::value)>
constexpr auto operator&&(const T1 &t1, const T2 &t2) {
  return front::and_<aux::zero_wrapper<T1>, aux::zero_wrapper<T2>>(aux::zero_wrapper<T1>{t1}, aux::zero_wrapper<T2>{t2});
}
template <class T1, class T2, __BOOST_SML_REQUIRES(concepts::callable<bool, T1>::value &&concepts::callable<bool, T2>::value)>
constexpr auto operator||(const T1 &t1, const T2 &t2) {
  return front::or_<aux::zero_wrapper<T1>, aux::zero_wrapper<T2>>(aux::zero_wrapper<T1>{t1}, aux::zero_wrapper<T2>{t2});
}
template <class T1, class T2, __BOOST_SML_REQUIRES(concepts::callable<void, T1>::value &&concepts::callable<void, T2>::value)>
constexpr auto operator,(const T1 &t1, const T2 &t2) {
  return front::seq_<aux::zero_wrapper<T1>, aux::zero_wrapper<T2>>(aux::zero_wrapper<T1>{t1}, aux::zero_wrapper<T2>{t2});
}
namespace front {
namespace actions {
struct defer : action_base {
  template <class TEvent, class Tsm, class TDeps, class TSubs>
  constexpr void operator()(const TEvent &event, Tsm &sm, TDeps &, TSubs &) {
    if (sm.defer_processing_) {
      sm.defer_again_ = true;
    } else {
      sm.defer_.push_back(event);
    }
  }
};
}  // namespace actions
}  // namespace front
using testing = back::policies::testing;
template <class T>
using logger = back::policies::logger<T>;
template <class T>
using thread_safe = back::policies::thread_safe<T>;
template <class T>
using dispatch = back::policies::dispatch<T>;
template <template <class...> class T>
using defer_queue = back::policies::defer_queue<T>;
template <template <class...> class T>
using process_queue = back::policies::process_queue<T>;
using dont_instantiate_statemachine_class = back::policies::dont_instantiate_statemachine_class;
#if defined(_MSC_VER) && !defined(__clang__)
template <class T, class... TPolicies, class T__ = aux::remove_reference_t<decltype(aux::declval<T>())>>
using sm = back::sm<back::sm_policy<T__, TPolicies...>>;
#else
template <class T, class... TPolicies>
using sm = back::sm<back::sm_policy<T, TPolicies...>>;
#endif
#if defined(__cpp_deduction_guides)
namespace front {
template <class T, class... TPolicies>
struct sm : back::sm<back::sm_policy<T, TPolicies...>> {
  constexpr sm(T t) : back::sm<back::sm_policy<T, TPolicies...>>::sm{t} {}
  using back::sm<back::sm_policy<T, TPolicies...>>::sm;
};
}  // namespace front
#endif
namespace concepts {
aux::false_type transitional_impl(...);
template <class T>
auto transitional_impl(T &&t) -> aux::always<typename T::dst_state, typename T::src_state, typename T::event, typename T::deps,
                                             decltype(T::initial), decltype(T::history)>;
template <class T>
struct transitional : decltype(transitional_impl(aux::declval<T>())) {};
}  // namespace concepts
namespace front {
namespace actions {
struct process {
  template <class TEvent>
  class process_impl : public action_base {
   public:
    constexpr explicit process_impl(const TEvent &event) : event(event) {}
    template <class T, class Tsm, class TDeps, class TSubs>
    constexpr void operator()(const T &, Tsm &, TDeps &, TSubs &subs) {
      aux::get<get_root_sm_t<TSubs>>(subs).process_.push(event);
    }

   private:
    TEvent event{};
  };
  template <class TEvent>
  constexpr auto operator()(const TEvent &event) {
    return process_impl<TEvent>{event};
  }
};
}  // namespace actions
}  // namespace front
namespace front {
template <class, class>
struct transition_eg;
template <class, class>
struct transition_ea;
template <class TEvent>
struct event {
  template <class T, __BOOST_SML_REQUIRES(concepts::callable<bool, T>::value)>
  constexpr auto operator[](const T &t) const {
    return transition_eg<event, aux::zero_wrapper<T>>{*this, aux::zero_wrapper<T>{t}};
  }
  template <class T, __BOOST_SML_REQUIRES(concepts::callable<void, T>::value)>
  constexpr auto operator/(const T &t) const {
    return transition_ea<event, aux::zero_wrapper<T>>{*this, aux::zero_wrapper<T>{t}};
  }
  constexpr auto operator()() const { return TEvent{}; }
};
}  // namespace front
namespace front {
struct initial_state {};
struct history_state {};
template <class...>
struct transition;
template <class, class>
struct transition_sa;
template <class, class>
struct transition_sg;
template <class, class>
struct transition_eg;
template <class>
struct state;
template <class TState>
struct state_impl {
  template <class T>
  constexpr auto operator<=(const T &t) const {
    return transition<TState, T>{static_cast<const TState &>(*this), t};
  }
  template <class T>
  constexpr auto operator+(const T &t) const {
    return transition<TState, T>{static_cast<const TState &>(*this), t};
  }
  template <class T, __BOOST_SML_REQUIRES(concepts::callable<bool, T>::value)>
  constexpr auto operator[](const T &t) const {
    return transition_sg<TState, aux::zero_wrapper<T>>{static_cast<const TState &>(*this), aux::zero_wrapper<T>{t}};
  }
  template <class T, __BOOST_SML_REQUIRES(concepts::callable<void, T>::value)>
  constexpr auto operator/(const T &t) const {
    return transition_sa<TState, aux::zero_wrapper<T>>{static_cast<const TState &>(*this), aux::zero_wrapper<T>{t}};
  }
};
template <class TState>
struct state : state_impl<state<TState>> {
  using type = TState;
  static constexpr auto initial = false;
  static constexpr auto history = false;
  constexpr auto operator*() const { return state<TState(initial_state)>{}; }
  constexpr auto operator()(const initial_state &) const { return state<TState(initial_state)>{}; }
  constexpr auto operator()(const history_state &) const { return state<TState(history_state)>{}; }
  template <class... Ts>
  constexpr auto operator()(const state<Ts> &...) const {
    return state<TState(Ts...)>{};
  }
  template <class T>
  constexpr auto operator=(const T &t) const {
    return transition<T, state>{t, *this};
  }
  template <class T>
  constexpr auto sm() const {
    return state<back::sm<back::sm_policy<T, aux::identity<TState>>>>{};
  }
};
template <class TState>
struct state<TState(initial_state)> : state_impl<state<TState(initial_state)>> {
  using type = TState;
  static constexpr auto initial = true;
  static constexpr auto history = false;
  template <class T>
  constexpr auto operator=(const T &t) const {
    return transition<T, state>{t, *this};
  }
};
template <class TState>
struct state<TState(history_state)> : state_impl<state<TState(history_state)>> {
  using type = TState;
  static constexpr auto initial = true;
  static constexpr auto history = true;
  template <class T>
  constexpr auto operator=(const T &t) const {
    return transition<T, state>{t, *this};
  }
};
#if defined(_MSC_VER) && !defined(__clang__)
template <class T, class T__ = aux::remove_reference_t<decltype(aux::declval<T>())>, class = void>
struct state_sm {
  using type = state<T>;
};
template <class T, class T__>
struct state_sm<T, T__, aux::enable_if_t<concepts::composable<T__>::value>> {
  using type = state<back::sm<back::sm_policy<T__>>>;
};
#else
template <class T, class = void>
struct state_sm {
  using type = state<T>;
};
template <class T>
struct state_sm<T, aux::enable_if_t<concepts::composable<T>::value>> {
  using type = state<back::sm<back::sm_policy<T>>>;
};
#endif
}  // namespace front
namespace front {
struct internal {};
template <class, class>
struct ignore;
template <class E, class... Ts>
struct ignore<E, aux::type_list<Ts...>> {
  template <class T>
  struct non_events {
    using type =
        aux::conditional_t<aux::is_same<back::get_event_t<E>, aux::remove_const_t<aux::remove_reference_t<T>>>::value ||
                               aux::is_same<T, action_base>::value,
                           aux::type_list<>, aux::type_list<T>>;
  };
  using type = aux::join_t<typename non_events<Ts>::type...>;
};
template <class T, class E, class = void>
struct get_deps {
  using type = typename ignore<E, args_t<T, E>>::type;
};
template <class T, class E>
using get_deps_t = typename get_deps<T, E>::type;
template <template <class...> class T, class... Ts, class E>
struct get_deps<T<Ts...>, E, aux::enable_if_t<aux::is_base_of<operator_base, T<Ts...>>::value>> {
  using type = aux::join_t<get_deps_t<Ts, E>...>;
};
struct always {
  using type = always;
  constexpr bool operator()() const { return true; }
  __BOOST_SML_ZERO_SIZE_ARRAY(aux::byte);
};
struct none {
  using type = none;
  constexpr void operator()() {}
  __BOOST_SML_ZERO_SIZE_ARRAY(aux::byte);
};
template <class...>
struct transition;
template <class E, class G>
struct transition<front::event<E>, G> {
  template <class T>
  constexpr auto operator/(const T &t) const {
    return transition<front::event<E>, G, aux::zero_wrapper<T>>{e, g, aux::zero_wrapper<T>{t}};
  }
  front::event<E> e;
  G g;
};
template <class E, class G, class A>
struct transition<front::event<E>, G, A> {
  front::event<E> e;
  G g;
  A a;
};
template <class S2, class G, class A>
struct transition<state<S2>, G, A> : transition<state<internal>, state<S2>, front::event<back::anonymous>, G, A> {
  using transition<state<internal>, state<S2>, front::event<back::anonymous>, G, A>::g;
  using transition<state<internal>, state<S2>, front::event<back::anonymous>, G, A>::a;
  constexpr transition(const G &g, const A &a) : transition<state<internal>, state<S2>, front::event<back::anonymous>, G, A>{g, a} {}
  template <class T>
  constexpr auto operator=(const T &) const {
    return transition<T, state<S2>, front::event<back::anonymous>, G, A>{g, a};
  }
  const auto &operator()() const { return *this; }
  template <class TEvent, class Tsm, class TDeps, class TSubs>
  constexpr auto operator()(const TEvent &event, Tsm &sm, TDeps &deps, TSubs &subs) -> void {
    typename Tsm::state_t s{};
    this->execute(event, sm, deps, subs, s);
  }
};
template <class S1, class S2>
struct transition<state<S1>, state<S2>> : transition<state<S1>, state<S2>, front::event<back::anonymous>, always, none> {
  constexpr transition(const state<S1> &, const state<S2> &)
      : transition<state<S1>, state<S2>, front::event<back::anonymous>, always, none>{always{}, none{}} {}
};
template <class S2, class G>
struct transition_sg<state<S2>, G> : transition<state<internal>, state<S2>, front::event<back::anonymous>, G, none> {
  using transition<state<internal>, state<S2>, front::event<back::anonymous>, G, none>::g;
  transition_sg(const state<S2> &, const G &g)
      : transition<state<internal>, state<S2>, front::event<back::anonymous>, G, none>{g, none{}} {}
  template <class T>
  constexpr auto operator/(const T &t) const {
    return transition<state<S2>, G, aux::zero_wrapper<T>>{g, aux::zero_wrapper<T>{t}};
  }
  template <class T>
  constexpr auto operator=(const T &) const {
    return transition<T, state<S2>, front::event<back::anonymous>, G, none>{g, none{}};
  }
};
template <class S2, class A>
struct transition_sa<state<S2>, A> : transition<state<internal>, state<S2>, front::event<back::anonymous>, always, A> {
  using transition<state<internal>, state<S2>, front::event<back::anonymous>, always, A>::a;
  transition_sa(const state<S2> &, const A &a)
      : transition<state<internal>, state<S2>, front::event<back::anonymous>, always, A>{always{}, a} {}
  template <class T>
  constexpr auto operator=(const T &) const {
    return transition<T, state<S2>, front::event<back::anonymous>, always, A>{always{}, a};
  }
};
template <class S2, class E>
struct transition<state<S2>, front::event<E>> {
  template <class T>
  constexpr auto operator=(const T &) const {
    return transition<T, state<S2>, front::event<E>, always, none>{always{}, none{}};
  }
  const state<S2> &s2;
  front::event<E> e;
};
template <class E, class G>
struct transition_eg<front::event<E>, G> {
  template <class T>
  constexpr auto operator/(const T &t) const {
    return transition<front::event<E>, G, aux::zero_wrapper<T>>{e, g, aux::zero_wrapper<T>{t}};
  }
  front::event<E> e;
  G g;
};
template <class E, class A>
struct transition_ea<front::event<E>, A> {
  front::event<E> e;
  A a;
};
template <class S1, class S2, class G, class A>
struct transition<state<S1>, transition<state<S2>, G, A>>
    : transition<state<S1>, state<S2>, front::event<back::anonymous>, G, A> {
  constexpr transition(const state<S1> &, const transition<state<S2>, G, A> &t)
      : transition<state<S1>, state<S2>, front::event<back::anonymous>, G, A>{t.g, t.a} {}
};
template <class S1, class E, class G, class A>
struct transition<state<S1>, transition<front::event<E>, G, A>>
    : transition<state<internal>, state<S1>, front::event<E>, G, A> {
  using transition<state<internal>, state<S1>, front::event<E>, G, A>::g;
  using transition<state<internal>, state<S1>, front::event<E>, G, A>::a;
  constexpr transition(const state<S1> &, const transition<front::event<E>, G, A> &t)
      : transition<state<internal>, state<S1>, front::event<E>, G, A>{t.g, t.a} {}
  template <class T>
  constexpr auto operator=(const T &) const {
    return transition<T, state<S1>, front::event<E>, G, A>{g, a};
  }
};
template <class S1, class S2, class E>
struct transition<state<S1>, transition<state<S2>, front::event<E>>>
    : transition<state<S1>, state<S2>, front::event<E>, always, none> {
  constexpr transition(const state<S1> &, const transition<state<S2>, front::event<E>> &)
      : transition<state<S1>, state<S2>, front::event<E>, always, none>{always{}, none{}} {}
};
template <class S1, class S2, class G>
struct transition<state<S1>, transition_sg<state<S2>, G>>
    : transition<state<S1>, state<S2>, front::event<back::anonymous>, G, none> {
  constexpr transition(const state<S1> &, const transition_sg<state<S2>, G> &t)
      : transition<state<S1>, state<S2>, front::event<back::anonymous>, G, none>{t.g, none{}} {}
};
template <class S1, class S2, class A>
struct transition<state<S1>, transition_sa<state<S2>, A>>
    : transition<state<S1>, state<S2>, front::event<back::anonymous>, always, A> {
  constexpr transition(const state<S1> &, const transition_sa<state<S2>, A> &t)
      : transition<state<S1>, state<S2>, front::event<back::anonymous>, always, A>{always{}, t.a} {}
};
template <class S2, class E, class G>
struct transition<state<S2>, transition_eg<front::event<E>, G>>
    : transition<state<internal>, state<S2>, front::event<E>, G, none> {
  using transition<state<internal>, state<S2>, front::event<E>, G, none>::g;
  constexpr transition(const state<S2> &, const transition_eg<front::event<E>, G> &t)
      : transition<state<internal>, state<S2>, front::event<E>, G, none>{t.g, none{}} {}
  template <class T>
  constexpr auto operator=(const T &) const {
    return transition<T, state<S2>, front::event<E>, G, none>{g, none{}};
  }
};
template <class S1, class S2, class E, class G>
struct transition<state<S1>, transition<state<S2>, transition_eg<front::event<E>, G>>>
    : transition<state<S1>, state<S2>, front::event<E>, G, none> {
  constexpr transition(const state<S1> &, const transition<state<S2>, transition_eg<front::event<E>, G>> &t)
      : transition<state<S1>, state<S2>, front::event<E>, G, none>{t.g, none{}} {}
};
template <class S2, class E, class A>
struct transition<state<S2>, transition_ea<front::event<E>, A>>
    : transition<state<internal>, state<S2>, front::event<E>, always, A> {
  using transition<state<internal>, state<S2>, front::event<E>, always, A>::a;
  constexpr transition(const state<S2> &, const transition_ea<front::event<E>, A> &t)
      : transition<state<internal>, state<S2>, front::event<E>, always, A>{always{}, t.a} {}
  template <class T>
  constexpr auto operator=(const T &) const {
    return transition<T, state<S2>, front::event<E>, always, A>{always{}, a};
  }
};
template <class S1, class S2, class E, class A>
struct transition<state<S1>, transition<state<S2>, transition_ea<front::event<E>, A>>>
    : transition<state<S1>, state<S2>, front::event<E>, always, A> {
  constexpr transition(const state<S1> &, const transition<state<S2>, transition_ea<front::event<E>, A>> &t)
      : transition<state<S1>, state<S2>, front::event<E>, always, A>{always{}, t.a} {}
};
template <class S1, class S2, class E, class G, class A>
struct transition<state<S1>, transition<state<S2>, transition<front::event<E>, G, A>>>
    : transition<state<S1>, state<S2>, front::event<E>, G, A> {
  constexpr transition(const state<S1> &, const transition<state<S2>, transition<front::event<E>, G, A>> &t)
      : transition<state<S1>, state<S2>, front::event<E>, G, A>{t.g, t.a} {}
};
template <class T, class TSubs, class... Ts, class... THs>
constexpr void update_composite_states(TSubs &subs, aux::true_type, const aux::type_list<THs...> &) {
  using state_t = typename T::state_t;
  auto &sm = back::sub_sm<T>::get(&subs);
  (void)sm;
#if defined(__cpp_fold_expressions)
  ((sm.current_state_[aux::get_id<state_t, THs>((typename T::initial_states_ids_t *)0)] =
        aux::get_id<state_t, THs>((typename T::states_ids_t *)0)),
   ...);
#else
  (void)aux::swallow{0, (sm.current_state_[aux::get_id<state_t, THs>((typename T::initial_states_ids_t *)0)] =
                             aux::get_id<state_t, THs>((typename T::states_ids_t *)0),
                         0)...};
#endif
}
namespace detail {
template<class T>
struct is_composite_state {
  constexpr static bool value = false;
};
template<class T>
struct is_composite_state<back::sm<T>> {
  constexpr static bool value = true;
};
template<class T>
constexpr bool is_composite_state_v = is_composite_state<T>::value;
} // namespace detail

template <class T, class TSubs, class... Ts>
constexpr void update_composite_states(TSubs &subs, aux::false_type, Ts &&...) {
  back::sub_sm<T>::get(&subs).initialize(typename T::initial_states_t{});

  aux::for_each(typename T::initial_states_t{},
                [&](auto state_identity){
                  using state_t = typename decltype(state_identity)::type;
                  if constexpr (detail::is_composite_state_v<state_t>) {
                    using sm_impl_t = aux::apply_t<back::sm_impl, state_t>;
                    update_composite_states<sm_impl_t>(subs, aux::false_type{}, Ts{}...);
                  }
                });
}
template <class SM, class TDeps, class TSubs, class TSrcState, class TDstState>
constexpr void update_current_state(SM &, TDeps &deps, TSubs &, typename SM::state_t &current_state,
                          const typename SM::state_t &new_state, const TSrcState &, const TDstState &) {
  back::policies::log_state_change<typename SM::sm_t>(aux::type_wrapper<typename SM::logger_t>{}, deps,
                                                      aux::string<typename TSrcState::type>{},
                                                      aux::string<typename TDstState::type>{});
  current_state = new_state;
}
template <class SM, class TDeps, class TSubs, class TSrcState, class T>
constexpr void update_current_state(SM &, TDeps &deps, TSubs &subs, typename SM::state_t &current_state,
                          const typename SM::state_t &new_state, const TSrcState &, const state<back::sm<T>> &) {
  back::policies::log_state_change<typename SM::sm_t>(aux::type_wrapper<typename SM::logger_t>{}, deps,
                                                      aux::string<typename TSrcState::type>{}, aux::string<T>{});
  current_state = new_state;
  update_composite_states<back::sm_impl<T>>(subs, typename back::sm_impl<T>::has_history_states{},
                                            typename back::sm_impl<T>::history_states_t{});
}
template <class S1, class S2, class E, class G, class A>
struct transition<state<S1>, state<S2>, front::event<E>, G, A> {
  static constexpr auto initial = state<S2>::initial;
  static constexpr auto history = state<S2>::history;
  using src_state = typename state<S2>::type;
  using dst_state = typename state<S1>::type;
  using event = E;
  using guard = G;
  using action = A;
  using deps = aux::apply_t<aux::unique_t, aux::join_t<get_deps_t<G, E>, get_deps_t<A, E>>>;
  constexpr transition(const G &g, const A &a) : g(g), a(a) {}
  template <class TEvent, class SM, class TDeps, class TSubs>
  constexpr bool execute(const TEvent &event, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &current_state, aux::true_type) {
    if (call<TEvent, args_t<G, TEvent>, typename SM::logger_t>::execute(g, event, sm, deps, subs)) {
      sm.process_internal_event(back::on_exit<back::_, TEvent>{event}, deps, subs, current_state);
      update_current_state(sm, deps, subs, current_state,
                           aux::get_id<typename SM::state_t, dst_state>((typename SM::states_ids_t *)0), state<src_state>{},
                           state<dst_state>{});
      call<TEvent, args_t<A, TEvent>, typename SM::logger_t>::execute(a, event, sm, deps, subs);
      sm.process_internal_event(back::on_entry<back::_, TEvent>{event}, deps, subs, current_state);
      return true;
    }
    return false;
  }
  template <class TEvent, class SM, class TDeps, class TSubs>
  constexpr bool execute(const TEvent &event, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &current_state, aux::false_type) {
    if (call<TEvent, args_t<G, TEvent>, typename SM::logger_t>::execute(g, event, sm, deps, subs)) {
      update_current_state(sm, deps, subs, current_state,
                           aux::get_id<typename SM::state_t, dst_state>((typename SM::states_ids_t *)0), state<src_state>{},
                           state<dst_state>{});
      call<TEvent, args_t<A, TEvent>, typename SM::logger_t>::execute(a, event, sm, deps, subs);
      return true;
    }
    return false;
  }
  G g;
  A a;
};
template <class S2, class E, class G, class A>
struct transition<state<internal>, state<S2>, front::event<E>, G, A> {
  static constexpr auto initial = state<S2>::initial;
  static constexpr auto history = state<S2>::history;
  using src_state = typename state<S2>::type;
  using dst_state = internal;
  using event = E;
  using guard = G;
  using action = A;
  using deps = aux::apply_t<aux::unique_t, aux::join_t<get_deps_t<G, E>, get_deps_t<A, E>>>;
  constexpr transition(const G &g, const A &a) : g(g), a(a) {}
  template <class TEvent, class SM, class TDeps, class TSubs, class... Ts>
  constexpr bool execute(const TEvent &event, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &, Ts &&...) {
    if (call<TEvent, args_t<G, TEvent>, typename SM::logger_t>::execute(g, event, sm, deps, subs)) {
      call<TEvent, args_t<A, TEvent>, typename SM::logger_t>::execute(a, event, sm, deps, subs);
      return true;
    }
    return false;
  }
  G g;
  A a;
};
template <class S1, class S2, class E, class A>
struct transition<state<S1>, state<S2>, front::event<E>, always, A> {
  static constexpr auto initial = state<S2>::initial;
  static constexpr auto history = state<S2>::history;
  using src_state = typename state<S2>::type;
  using dst_state = typename state<S1>::type;
  using event = E;
  using guard = always;
  using action = A;
  using deps = aux::apply_t<aux::unique_t, get_deps_t<A, E>>;
  constexpr transition(const always &, const A &a) : a(a) {}
  template <class TEvent, class SM, class TDeps, class TSubs>
  constexpr bool execute(const TEvent &event, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &current_state, aux::true_type) {
    sm.process_internal_event(back::on_exit<back::_, TEvent>{event}, deps, subs, current_state);
    update_current_state(sm, deps, subs, current_state,
                         aux::get_id<typename SM::state_t, dst_state>((typename SM::states_ids_t *)0), state<src_state>{},
                         state<dst_state>{});
    call<TEvent, args_t<A, TEvent>, typename SM::logger_t>::execute(a, event, sm, deps, subs);
    sm.process_internal_event(back::on_entry<back::_, TEvent>{event}, deps, subs, current_state);
    return true;
  }
  template <class TEvent, class SM, class TDeps, class TSubs>
  constexpr bool execute(const TEvent &event, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &current_state, aux::false_type) {
    update_current_state(sm, deps, subs, current_state,
                         aux::get_id<typename SM::state_t, dst_state>((typename SM::states_ids_t *)0), state<src_state>{},
                         state<dst_state>{});
    call<TEvent, args_t<A, TEvent>, typename SM::logger_t>::execute(a, event, sm, deps, subs);
    return true;
  }
  A a;
};
template <class S2, class E, class A>
struct transition<state<internal>, state<S2>, front::event<E>, always, A> {
  static constexpr auto initial = state<S2>::initial;
  static constexpr auto history = state<S2>::history;
  using src_state = typename state<S2>::type;
  using dst_state = internal;
  using event = E;
  using guard = always;
  using action = A;
  using deps = aux::apply_t<aux::unique_t, get_deps_t<A, E>>;
  constexpr transition(const always &, const A &a) : a(a) {}
  template <class TEvent, class SM, class TDeps, class TSubs, class... Ts>
  constexpr bool execute(const TEvent &event, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &, Ts &&...) {
    call<TEvent, args_t<A, TEvent>, typename SM::logger_t>::execute(a, event, sm, deps, subs);
    return true;
  }
  A a;
};
template <class S1, class S2, class E, class G>
struct transition<state<S1>, state<S2>, front::event<E>, G, none> {
  static constexpr auto initial = state<S2>::initial;
  static constexpr auto history = state<S2>::history;
  using src_state = typename state<S2>::type;
  using dst_state = typename state<S1>::type;
  using event = E;
  using guard = G;
  using action = none;
  using deps = aux::apply_t<aux::unique_t, get_deps_t<G, E>>;
  constexpr transition(const G &g, const none &) : g(g) {}
  template <class TEvent, class SM, class TDeps, class TSubs>
  constexpr bool execute(const TEvent &event, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &current_state, aux::true_type) {
    if (call<TEvent, args_t<G, TEvent>, typename SM::logger_t>::execute(g, event, sm, deps, subs)) {
      sm.process_internal_event(back::on_exit<back::_, TEvent>{event}, deps, subs, current_state);
      update_current_state(sm, deps, subs, current_state,
                           aux::get_id<typename SM::state_t, dst_state>((typename SM::states_ids_t *)0), state<src_state>{},
                           state<dst_state>{});
      sm.process_internal_event(back::on_entry<back::_, TEvent>{event}, deps, subs, current_state);
      return true;
    }
    return false;
  }
  template <class TEvent, class SM, class TDeps, class TSubs>
  constexpr bool execute(const TEvent &event, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &current_state, aux::false_type) {
    if (call<TEvent, args_t<G, TEvent>, typename SM::logger_t>::execute(g, event, sm, deps, subs)) {
      update_current_state(sm, deps, subs, current_state,
                           aux::get_id<typename SM::state_t, dst_state>((typename SM::states_ids_t *)0), state<src_state>{},
                           state<dst_state>{});
      return true;
    }
    return false;
  }
  G g;
};
template <class S2, class E, class G>
struct transition<state<internal>, state<S2>, front::event<E>, G, none> {
  static constexpr auto initial = state<S2>::initial;
  static constexpr auto history = state<S2>::history;
  using src_state = typename state<S2>::type;
  using dst_state = internal;
  using event = E;
  using guard = G;
  using action = none;
  using deps = aux::apply_t<aux::unique_t, get_deps_t<G, E>>;
  constexpr transition(const G &g, const none &) : g(g) {}
  template <class TEvent, class SM, class TDeps, class TSubs, class... Ts>
  constexpr bool execute(const TEvent &event, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &, Ts &&...) {
    return call<TEvent, args_t<G, TEvent>, typename SM::logger_t>::execute(g, event, sm, deps, subs);
  }
  G g;
};
template <class S1, class S2, class E>
struct transition<state<S1>, state<S2>, front::event<E>, always, none> {
  static constexpr auto initial = state<S2>::initial;
  static constexpr auto history = state<S2>::history;
  using src_state = typename state<S2>::type;
  using dst_state = typename state<S1>::type;
  using event = E;
  using guard = always;
  using action = none;
  using deps = aux::type_list<>;
  constexpr transition(const always &, const none &) {}
  template <class TEvent, class SM, class TDeps, class TSubs>
  constexpr bool execute(const TEvent &event, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &current_state, aux::true_type) {
    sm.process_internal_event(back::on_exit<back::_, TEvent>{event}, deps, subs, current_state);
    update_current_state(sm, deps, subs, current_state,
                         aux::get_id<typename SM::state_t, dst_state>((typename SM::states_ids_t *)0), state<src_state>{},
                         state<dst_state>{});
    sm.process_internal_event(back::on_entry<back::_, TEvent>{event}, deps, subs, current_state);
    return true;
  }
  template <class TEvent, class SM, class TDeps, class TSubs>
  constexpr bool execute(const TEvent &, SM &sm, TDeps &deps, TSubs &subs, typename SM::state_t &current_state, aux::false_type) {
    update_current_state(sm, deps, subs, current_state,
                         aux::get_id<typename SM::state_t, dst_state>((typename SM::states_ids_t *)0), state<src_state>{},
                         state<dst_state>{});
    return true;
  }
  __BOOST_SML_ZERO_SIZE_ARRAY(aux::byte);
};
template <class S2, class E>
struct transition<state<internal>, state<S2>, front::event<E>, always, none> {
  static constexpr auto initial = state<S2>::initial;
  static constexpr auto history = state<S2>::history;
  using src_state = typename state<S2>::type;
  using dst_state = internal;
  using event = E;
  using guard = always;
  using action = none;
  using deps = aux::type_list<>;
  constexpr transition(const always &, const none &) {}
  template <class TEvent, class SM, class TDeps, class TSubs, class... Ts>
  constexpr bool execute(const TEvent &, SM &, TDeps &, TSubs &, typename SM::state_t &, Ts &&...) {
    return true;
  }
  __BOOST_SML_ZERO_SIZE_ARRAY(aux::byte);
};
}  // namespace front
using _ = back::_;
#if !(defined(_MSC_VER) && !defined(__clang__))
template <class TEvent>
constexpr front::event<TEvent> event{};
#else
template <class TEvent>
front::event<TEvent> event __BOOST_SML_VT_INIT;
#endif
template <class TEvent>
__BOOST_SML_UNUSED front::event<back::on_entry<_, TEvent>> on_entry __BOOST_SML_VT_INIT;
template <class TEvent>
__BOOST_SML_UNUSED front::event<back::on_exit<_, TEvent>> on_exit __BOOST_SML_VT_INIT;
template <class TEvent>
front::event<back::unexpected_event<TEvent>> unexpected_event __BOOST_SML_VT_INIT;
template <class T>
front::event<back::exception<T>> exception __BOOST_SML_VT_INIT;
using anonymous = back::anonymous;
using initial = back::initial;
#if !(defined(_MSC_VER) && !defined(__clang__))
template <class T>
constexpr typename front::state_sm<T>::type state{};
#else
template <class T>
typename front::state_sm<T>::type state __BOOST_SML_VT_INIT;
#endif
#if !(defined(__ICCARM__))
inline namespace literals {
#if defined(__cpp_nontype_template_parameter_class) || \
    defined(__cpp_nontype_template_args) && __cpp_nontype_template_args >= 201911L
template <aux::fixed_string Str>
constexpr auto operator""_s() {
  return []<auto... Ns>(aux::index_sequence<Ns...>) { return front::state<aux::string<char, Str.data[Ns]...>>{}; }
  (aux::make_index_sequence<Str.size>{});
}
template <aux::fixed_string Str>
constexpr auto operator""_e() {
  return []<auto... Ns>(aux::index_sequence<Ns...>) { return event<aux::string<char, Str.data[Ns]...>>; }
  (aux::make_index_sequence<Str.size>{});
}
#elif !(defined(_MSC_VER) && !defined(__clang__))
template <class T, T... Chrs>
constexpr auto operator""_s() {
  return front::state<aux::string<T, Chrs...>>{};
}
template <class T, T... Chrs>
constexpr auto operator""_e() {
  return event<aux::string<T, Chrs...>>;
}
#endif
}  // namespace literals
#endif
__BOOST_SML_UNUSED static front::state<back::terminate_state> X;
__BOOST_SML_UNUSED static front::history_state H;
__BOOST_SML_UNUSED static front::actions::defer defer;
__BOOST_SML_UNUSED static front::actions::process process;
__BOOST_SML_UNUSED static front::state<class SML_EVAL> eval;
template <class... Ts, __BOOST_SML_REQUIRES(aux::is_same<aux::bool_list<aux::always<Ts>::value...>,
                                                         aux::bool_list<concepts::transitional<Ts>::value...>>::value)>
constexpr auto make_transition_table(Ts... ts) {
  return aux::pool<Ts...>{ts...};
}
BOOST_SML_NAMESPACE_END
#undef __BOOST_SML_UNUSED
#undef __BOOST_SML_VT_INIT
#undef __BOOST_SML_ZERO_SIZE_ARRAY
#undef __BOOST_SML_ZERO_SIZE_ARRAY_CREATE
#undef __BOOST_SML_TEMPLATE_KEYWORD
#if defined(__clang__)
#pragma clang diagnostic pop
#elif defined(__GNUC__)
#if defined(__BOOST_SML_DEFINED_HAS_BUILTIN)
#undef __has_builtin
#endif
#pragma GCC diagnostic pop
#elif defined(_MSC_VER) && !defined(__clang__) && defined(__BOOST_SML_DEFINED_HAS_BUILTIN)
#undef __has_builtin
#undef __has_builtin__make_integer_seq
#endif
#endif
#endif