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-// The MIT License (MIT)
-
-// Copyright (c) 2013-2016 Rapptz, ThePhD and contributors
-
-// Permission is hereby granted, free of charge, to any person obtaining a copy of
-// this software and associated documentation files (the "Software"), to deal in
-// the Software without restriction, including without limitation the rights to
-// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-// the Software, and to permit persons to whom the Software is furnished to do so,
-// subject to the following conditions:
-
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-#ifndef SOL_COROUTINE_HPP
-#define SOL_COROUTINE_HPP
-
-#include "reference.hpp"
-#include "stack.hpp"
-#include "function_result.hpp"
-#include "thread.hpp"
-
-namespace sol {
- class coroutine : public reference {
- private:
- call_status stats = call_status::yielded;
-
- void luacall(std::ptrdiff_t argcount, std::ptrdiff_t) {
-#if SOL_LUA_VERSION < 502
- stats = static_cast<call_status>(lua_resume(lua_state(), static_cast<int>(argcount)));
-#else
- stats = static_cast<call_status>(lua_resume(lua_state(), nullptr, static_cast<int>(argcount)));
-#endif // Lua 5.1 compat
- }
-
- template<std::size_t... I, typename... Ret>
- auto invoke(types<Ret...>, std::index_sequence<I...>, std::ptrdiff_t n) {
- luacall(n, sizeof...(Ret));
- return stack::pop<std::tuple<Ret...>>(lua_state());
- }
-
- template<std::size_t I, typename Ret>
- Ret invoke(types<Ret>, std::index_sequence<I>, std::ptrdiff_t n) {
- luacall(n, 1);
- return stack::pop<Ret>(lua_state());
- }
-
- template <std::size_t I>
- void invoke(types<void>, std::index_sequence<I>, std::ptrdiff_t n) {
- luacall(n, 0);
- }
-
- protected_function_result invoke(types<>, std::index_sequence<>, std::ptrdiff_t n) {
- int stacksize = lua_gettop(lua_state());
- int firstreturn = (std::max)(1, stacksize - static_cast<int>(n));
- luacall(n, LUA_MULTRET);
- int poststacksize = lua_gettop(lua_state());
- int returncount = poststacksize - (firstreturn - 1);
- if (error()) {
- return protected_function_result(lua_state(), lua_absindex(lua_state(), -1), 1, returncount, status());
- }
- return protected_function_result(lua_state(), firstreturn, returncount, returncount, status());
- }
-
- public:
- coroutine() noexcept = default;
- coroutine(const coroutine&) noexcept = default;
- coroutine(coroutine&&) noexcept = default;
- coroutine& operator=(const coroutine&) noexcept = default;
- coroutine& operator=(coroutine&&) noexcept = default;
- template <typename T, meta::enable<meta::neg<std::is_same<meta::unqualified_t<T>, coroutine>>, std::is_base_of<reference, meta::unqualified_t<T>>> = meta::enabler>
- coroutine(T&& r) : reference(std::forward<T>(r)) {}
- coroutine(lua_nil_t r) : reference(r) {}
- coroutine(const stack_reference& r) noexcept : coroutine(r.lua_state(), r.stack_index()) {}
- coroutine(stack_reference&& r) noexcept : coroutine(r.lua_state(), r.stack_index()) {}
- template <typename T, meta::enable<meta::neg<std::is_integral<meta::unqualified_t<T>>>, meta::neg<std::is_same<T, ref_index>>> = meta::enabler>
- coroutine(lua_State* L, T&& r) : coroutine(L, sol::ref_index(r.registry_index())) {}
- coroutine(lua_State* L, int index = -1) : reference(L, index) {
-#ifdef SOL_CHECK_ARGUMENTS
- stack::check<coroutine>(L, index, type_panic);
-#endif // Safety
- }
- coroutine(lua_State* L, ref_index index) : reference(L, index) {
-#ifdef SOL_CHECK_ARGUMENTS
- auto pp = stack::push_pop(*this);
- stack::check<coroutine>(L, -1, type_panic);
-#endif // Safety
- }
-
- call_status status() const noexcept {
- return stats;
- }
-
- bool error() const noexcept {
- call_status cs = status();
- return cs != call_status::ok && cs != call_status::yielded;
- }
-
- bool runnable() const noexcept {
- return valid()
- && (status() == call_status::yielded);
- }
-
- explicit operator bool() const noexcept {
- return runnable();
- }
-
- template<typename... Args>
- protected_function_result operator()(Args&&... args) {
- return call<>(std::forward<Args>(args)...);
- }
-
- template<typename... Ret, typename... Args>
- decltype(auto) operator()(types<Ret...>, Args&&... args) {
- return call<Ret...>(std::forward<Args>(args)...);
- }
-
- template<typename... Ret, typename... Args>
- decltype(auto) call(Args&&... args) {
- push();
- int pushcount = stack::multi_push(lua_state(), std::forward<Args>(args)...);
- return invoke(types<Ret...>(), std::make_index_sequence<sizeof...(Ret)>(), pushcount);
- }
- };
-} // sol
-
-#endif // SOL_COUROUTINE_HPP