//
// Copyright (c) 2016-2020 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)
//
#include <boost/sml.hpp>
#include <cassert>

namespace sml = boost::sml;

namespace {
struct e1 {};
struct e2 {
  bool value = true;
};
auto event2 = sml::event<e2>;
struct e4 {
  int value = 0;
};

struct events {
  auto operator()() const noexcept {
    using namespace sml;
    auto guard = [](const e2& e) { return e.value; };

    // clang-format off
    return make_transition_table(
       *"idle"_s + event<e1> = "s1"_s
      , "s1"_s + event2 [guard] = "s2"_s
      , "s2"_s + "e3"_e = "s3"_s
      , "s3"_s + event<e4> / [] (const auto& e) { assert(42 == e.value); } = X
    );
    // clang-format on
  }
};
}  // namespace

int main() {
  sml::sm<events> sm;
  using namespace sml;
  sm.process_event(e1{});
  sm.process_event(e2{});
  sm.process_event("e3"_e());
  sm.process_event(e4{42});
  assert(sm.is(X));
}