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// sol2
// The MIT License (MIT)
// Copyright (c) 2013-2022 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_UNSAFE_FUNCTION_HPP
#define SOL_UNSAFE_FUNCTION_HPP
#include <sol/reference.hpp>
#include <sol/object.hpp>
#include <sol/stack.hpp>
#include <sol/function_result.hpp>
#include <sol/function_types.hpp>
#include <sol/bytecode.hpp>
#include <sol/dump_handler.hpp>
#include <cstdint>
namespace sol {
template <typename ref_t, bool aligned = false>
class basic_function : public basic_object<ref_t> {
private:
using base_t = basic_object<ref_t>;
void luacall(std::ptrdiff_t argcount, std::ptrdiff_t resultcount) const {
lua_call(lua_state(), static_cast<int>(argcount), static_cast<int>(resultcount));
}
template <std::size_t... I, typename... Ret>
auto invoke(types<Ret...>, std::index_sequence<I...>, std::ptrdiff_t n) const {
luacall(n, lua_size<std::tuple<Ret...>>::value);
return stack::pop<std::tuple<Ret...>>(lua_state());
}
template <std::size_t I, typename Ret, meta::enable<meta::neg<std::is_void<Ret>>> = meta::enabler>
Ret invoke(types<Ret>, std::index_sequence<I>, std::ptrdiff_t n) const {
luacall(n, lua_size<Ret>::value);
return stack::pop<Ret>(lua_state());
}
template <std::size_t I>
void invoke(types<void>, std::index_sequence<I>, std::ptrdiff_t n) const {
luacall(n, 0);
}
unsafe_function_result invoke(types<>, std::index_sequence<>, std::ptrdiff_t n) const {
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);
return unsafe_function_result(lua_state(), firstreturn, returncount);
}
public:
using base_t::lua_state;
basic_function() = default;
template <typename T,
meta::enable<meta::neg<std::is_same<meta::unqualified_t<T>, basic_function>>, meta::neg<std::is_same<base_t, stack_reference>>,
meta::neg<std::is_same<lua_nil_t, meta::unqualified_t<T>>>, is_lua_reference<meta::unqualified_t<T>>> = meta::enabler>
basic_function(T&& r) noexcept : base_t(std::forward<T>(r)) {
#if SOL_IS_ON(SOL_SAFE_REFERENCES)
if (!is_function<meta::unqualified_t<T>>::value) {
auto pp = stack::push_pop(*this);
constructor_handler handler {};
stack::check<basic_function>(lua_state(), -1, handler);
}
#endif // Safety
}
basic_function(const basic_function&) = default;
basic_function& operator=(const basic_function&) = default;
basic_function(basic_function&&) = default;
basic_function& operator=(basic_function&&) = default;
basic_function(const stack_reference& r) : basic_function(r.lua_state(), r.stack_index()) {
}
basic_function(stack_reference&& r) : basic_function(r.lua_state(), r.stack_index()) {
}
basic_function(lua_nil_t n) : base_t(n) {
}
template <typename T, meta::enable<is_lua_reference<meta::unqualified_t<T>>> = meta::enabler>
basic_function(lua_State* L, T&& r) : base_t(L, std::forward<T>(r)) {
#if SOL_IS_ON(SOL_SAFE_REFERENCES)
auto pp = stack::push_pop(*this);
constructor_handler handler {};
stack::check<basic_function>(lua_state(), -1, handler);
#endif // Safety
}
basic_function(lua_State* L, int index = -1) : base_t(L, index) {
#if SOL_IS_ON(SOL_SAFE_REFERENCES)
constructor_handler handler {};
stack::check<basic_function>(L, index, handler);
#endif // Safety
}
basic_function(lua_State* L, ref_index index) : base_t(L, index) {
#if SOL_IS_ON(SOL_SAFE_REFERENCES)
auto pp = stack::push_pop(*this);
constructor_handler handler {};
stack::check<basic_function>(lua_state(), -1, handler);
#endif // Safety
}
template <typename Fx>
int dump(lua_Writer writer, void* userdata, bool strip, Fx&& on_error) const {
this->push();
auto ppn = stack::push_popper_n<false>(this->lua_state(), 1);
int r = lua_dump(this->lua_state(), writer, userdata, strip ? 1 : 0);
if (r != 0) {
return on_error(this->lua_state(), r, writer, userdata, strip);
}
return r;
}
int dump(lua_Writer writer, void* userdata, bool strip = false) const {
return dump(writer, userdata, strip, &dump_throw_on_error);
}
template <typename Container = bytecode>
Container dump() const {
Container bc;
(void)dump(static_cast<lua_Writer>(&basic_insert_dump_writer<Container>), static_cast<void*>(&bc), false, &dump_panic_on_error);
return bc;
}
template <typename Container = bytecode, typename Fx>
Container dump(Fx&& on_error) const {
Container bc;
(void)dump(static_cast<lua_Writer>(&basic_insert_dump_writer<Container>), static_cast<void*>(&bc), false, std::forward<Fx>(on_error));
return bc;
}
template <typename... Args>
unsafe_function_result operator()(Args&&... args) const {
return call<>(std::forward<Args>(args)...);
}
template <typename... Ret, typename... Args>
decltype(auto) operator()(types<Ret...>, Args&&... args) const {
return call<Ret...>(std::forward<Args>(args)...);
}
template <typename... Ret, typename... Args>
decltype(auto) call(Args&&... args) const {
if (!aligned) {
base_t::push();
}
int pushcount = stack::multi_push_reference(lua_state(), std::forward<Args>(args)...);
return invoke(types<Ret...>(), std::make_index_sequence<sizeof...(Ret)>(), static_cast<std::ptrdiff_t>(pushcount));
}
};
} // namespace sol
#endif // SOL_UNSAFE_FUNCTION_HPP
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