962 lines
40 KiB
C++
962 lines
40 KiB
C++
// sol2
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// The MIT License (MIT)
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// Copyright (c) 2013-2022 Rapptz, ThePhD and contributors
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#pragma once
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#ifndef SOL_CALL_HPP
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#define SOL_CALL_HPP
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#include <sol/property.hpp>
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#include <sol/protect.hpp>
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#include <sol/wrapper.hpp>
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#include <sol/trampoline.hpp>
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#include <sol/policies.hpp>
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#include <sol/stack.hpp>
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#include <sol/unique_usertype_traits.hpp>
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namespace sol {
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namespace u_detail {
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} // namespace u_detail
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namespace policy_detail {
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template <int I, int... In>
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inline void handle_policy(static_stack_dependencies<I, In...>, lua_State* L, int&) {
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if constexpr (sizeof...(In) == 0) {
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(void)L;
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return;
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}
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else {
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absolute_index ai(L, I);
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if (type_of(L, ai) != type::userdata) {
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return;
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}
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lua_createtable(L, static_cast<int>(sizeof...(In)), 0);
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stack_reference deps(L, -1);
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auto per_dep = [&L, &deps](int i) {
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#if SOL_IS_ON(SOL_SAFE_STACK_CHECK)
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luaL_checkstack(L, 1, detail::not_enough_stack_space_generic);
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#endif // make sure stack doesn't overflow
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lua_pushvalue(L, i);
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luaL_ref(L, deps.stack_index());
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};
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(void)per_dep;
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(void)detail::swallow { int(), (per_dep(In), int())... };
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lua_setuservalue(L, ai);
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}
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}
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template <int... In>
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inline void handle_policy(returns_self_with<In...>, lua_State* L, int& pushed) {
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pushed = stack::push(L, raw_index(1));
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handle_policy(static_stack_dependencies<-1, In...>(), L, pushed);
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}
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inline void handle_policy(const stack_dependencies& sdeps, lua_State* L, int&) {
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absolute_index ai(L, sdeps.target);
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if (type_of(L, ai) != type::userdata) {
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return;
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}
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lua_createtable(L, static_cast<int>(sdeps.size()), 0);
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stack_reference deps(L, -1);
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#if SOL_IS_ON(SOL_SAFE_STACK_CHECK)
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luaL_checkstack(L, static_cast<int>(sdeps.size()), detail::not_enough_stack_space_generic);
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#endif // make sure stack doesn't overflow
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for (std::size_t i = 0; i < sdeps.size(); ++i) {
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lua_pushvalue(L, sdeps.stack_indices[i]);
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luaL_ref(L, deps.stack_index());
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}
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lua_setuservalue(L, ai);
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}
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template <typename P, meta::disable<std::is_base_of<detail::policy_base_tag, meta::unqualified_t<P>>> = meta::enabler>
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inline void handle_policy(P&& p, lua_State* L, int& pushed) {
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pushed = std::forward<P>(p)(L, pushed);
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}
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} // namespace policy_detail
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namespace function_detail {
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inline int no_construction_error(lua_State* L) {
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return luaL_error(L, "sol: cannot call this constructor (tagged as non-constructible)");
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}
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} // namespace function_detail
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namespace call_detail {
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template <typename R, typename W>
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inline auto& pick(std::true_type, property_wrapper<R, W>& f) {
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return f.read();
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}
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template <typename R, typename W>
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inline auto& pick(std::false_type, property_wrapper<R, W>& f) {
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return f.write();
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}
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template <typename T, typename List>
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struct void_call : void_call<T, meta::function_args_t<List>> { };
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template <typename T, typename... Args>
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struct void_call<T, types<Args...>> {
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static void call(Args...) {
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}
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};
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template <typename T, bool checked, bool clean_stack>
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struct constructor_match {
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T* obj_;
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reference* obj_lua_ref_;
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stack::stack_detail::undefined_metatable* p_umf_;
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constructor_match(T* obj_ptr, reference& obj_lua_ref, stack::stack_detail::undefined_metatable& umf)
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: obj_(obj_ptr), obj_lua_ref_(&obj_lua_ref), p_umf_(&umf) {
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}
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template <typename Fx, std::size_t I, typename... R, typename... Args>
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int operator()(types<Fx>, meta::index_value<I>, types<R...> r, types<Args...> a, lua_State* L, int, int start) const {
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detail::default_construct func {};
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int result = stack::call_into_lua<checked, clean_stack>(r, a, L, start, func, this->obj_);
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// construct userdata table
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// SPECIFICALLY, after we've created it successfully.
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// If the constructor exits for any reason we have to break things down...
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if constexpr (clean_stack) {
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obj_lua_ref_->push();
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(*this->p_umf_)();
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obj_lua_ref_->pop();
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}
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else {
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(*this->p_umf_)();
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}
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return result;
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}
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};
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namespace overload_detail {
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template <std::size_t... M, typename Match, typename... Args>
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inline int overload_match_arity(types<>, std::index_sequence<>, std::index_sequence<M...>, Match&&, lua_State* L, int, int, Args&&...) {
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return luaL_error(L, "sol: no matching function call takes this number of arguments and the specified types");
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}
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template <typename Fx, typename... Fxs, std::size_t I, std::size_t... In, std::size_t... M, typename Match, typename... Args>
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inline int overload_match_arity(types<Fx, Fxs...>, std::index_sequence<I, In...>, std::index_sequence<M...>, Match&& matchfx, lua_State* L,
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int fxarity, int start, Args&&... args) {
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typedef lua_bind_traits<meta::unwrap_unqualified_t<Fx>> traits;
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typedef meta::tuple_types<typename traits::return_type> return_types;
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typedef typename traits::free_args_list args_list;
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// compile-time eliminate any functions that we know ahead of time are of improper arity
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if constexpr (!traits::runtime_variadics_t::value
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&& meta::find_in_pack_v<meta::index_value<traits::free_arity>, meta::index_value<M>...>::value) {
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return overload_match_arity(types<Fxs...>(),
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std::index_sequence<In...>(),
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std::index_sequence<M...>(),
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std::forward<Match>(matchfx),
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L,
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fxarity,
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start,
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std::forward<Args>(args)...);
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}
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else {
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if constexpr (!traits::runtime_variadics_t::value) {
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if (traits::free_arity != fxarity) {
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return overload_match_arity(types<Fxs...>(),
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std::index_sequence<In...>(),
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std::index_sequence<traits::free_arity, M...>(),
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std::forward<Match>(matchfx),
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L,
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fxarity,
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start,
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std::forward<Args>(args)...);
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}
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}
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stack::record tracking {};
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if (!stack::stack_detail::check_types(args_list(), L, start, &no_panic, tracking)) {
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return overload_match_arity(types<Fxs...>(),
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std::index_sequence<In...>(),
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std::index_sequence<M...>(),
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std::forward<Match>(matchfx),
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L,
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fxarity,
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start,
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std::forward<Args>(args)...);
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}
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return matchfx(types<Fx>(), meta::index_value<I>(), return_types(), args_list(), L, fxarity, start, std::forward<Args>(args)...);
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}
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}
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template <std::size_t... M, typename Match, typename... Args>
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inline int overload_match_arity_single(
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types<>, std::index_sequence<>, std::index_sequence<M...>, Match&& matchfx, lua_State* L, int fxarity, int start, Args&&... args) {
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return overload_match_arity(types<>(),
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std::index_sequence<>(),
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std::index_sequence<M...>(),
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std::forward<Match>(matchfx),
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L,
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fxarity,
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start,
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std::forward<Args>(args)...);
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}
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template <typename Fx, std::size_t I, std::size_t... M, typename Match, typename... Args>
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inline int overload_match_arity_single(
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types<Fx>, std::index_sequence<I>, std::index_sequence<M...>, Match&& matchfx, lua_State* L, int fxarity, int start, Args&&... args) {
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typedef lua_bind_traits<meta::unwrap_unqualified_t<Fx>> traits;
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typedef meta::tuple_types<typename traits::return_type> return_types;
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typedef typename traits::free_args_list args_list;
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// compile-time eliminate any functions that we know ahead of time are of improper arity
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if constexpr (!traits::runtime_variadics_t::value
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&& meta::find_in_pack_v<meta::index_value<traits::free_arity>, meta::index_value<M>...>::value) {
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return overload_match_arity(types<>(),
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std::index_sequence<>(),
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std::index_sequence<M...>(),
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std::forward<Match>(matchfx),
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L,
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fxarity,
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start,
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std::forward<Args>(args)...);
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}
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if constexpr (!traits::runtime_variadics_t::value) {
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if (traits::free_arity != fxarity) {
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return overload_match_arity(types<>(),
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std::index_sequence<>(),
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std::index_sequence<traits::free_arity, M...>(),
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std::forward<Match>(matchfx),
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L,
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fxarity,
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start,
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std::forward<Args>(args)...);
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}
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}
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return matchfx(types<Fx>(), meta::index_value<I>(), return_types(), args_list(), L, fxarity, start, std::forward<Args>(args)...);
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}
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template <typename Fx, typename Fx1, typename... Fxs, std::size_t I, std::size_t I1, std::size_t... In, std::size_t... M, typename Match,
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typename... Args>
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inline int overload_match_arity_single(types<Fx, Fx1, Fxs...>, std::index_sequence<I, I1, In...>, std::index_sequence<M...>, Match&& matchfx,
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lua_State* L, int fxarity, int start, Args&&... args) {
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typedef lua_bind_traits<meta::unwrap_unqualified_t<Fx>> traits;
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typedef meta::tuple_types<typename traits::return_type> return_types;
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typedef typename traits::free_args_list args_list;
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// compile-time eliminate any functions that we know ahead of time are of improper arity
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if constexpr (!traits::runtime_variadics_t::value
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&& meta::find_in_pack_v<meta::index_value<traits::free_arity>, meta::index_value<M>...>::value) {
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return overload_match_arity(types<Fx1, Fxs...>(),
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std::index_sequence<I1, In...>(),
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std::index_sequence<M...>(),
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std::forward<Match>(matchfx),
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L,
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fxarity,
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start,
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std::forward<Args>(args)...);
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}
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else {
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if constexpr (!traits::runtime_variadics_t::value) {
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if (traits::free_arity != fxarity) {
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return overload_match_arity(types<Fx1, Fxs...>(),
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std::index_sequence<I1, In...>(),
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std::index_sequence<traits::free_arity, M...>(),
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std::forward<Match>(matchfx),
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L,
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fxarity,
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start,
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std::forward<Args>(args)...);
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}
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}
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stack::record tracking {};
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if (!stack::stack_detail::check_types(args_list(), L, start, &no_panic, tracking)) {
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return overload_match_arity(types<Fx1, Fxs...>(),
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std::index_sequence<I1, In...>(),
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std::index_sequence<M...>(),
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std::forward<Match>(matchfx),
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L,
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fxarity,
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start,
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std::forward<Args>(args)...);
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}
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return matchfx(types<Fx>(), meta::index_value<I>(), return_types(), args_list(), L, fxarity, start, std::forward<Args>(args)...);
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}
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}
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} // namespace overload_detail
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template <typename... Functions, typename Match, typename... Args>
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inline int overload_match_arity(Match&& matchfx, lua_State* L, int fxarity, int start, Args&&... args) {
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return overload_detail::overload_match_arity_single(types<Functions...>(),
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std::make_index_sequence<sizeof...(Functions)>(),
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std::index_sequence<>(),
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std::forward<Match>(matchfx),
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L,
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fxarity,
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start,
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std::forward<Args>(args)...);
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}
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template <typename... Functions, typename Match, typename... Args>
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inline int overload_match(Match&& matchfx, lua_State* L, int start, Args&&... args) {
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int fxarity = lua_gettop(L) - (start - 1);
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return overload_match_arity<Functions...>(std::forward<Match>(matchfx), L, fxarity, start, std::forward<Args>(args)...);
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}
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template <typename T, typename... TypeLists, typename Match, typename... Args>
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inline int construct_match(Match&& matchfx, lua_State* L, int fxarity, int start, Args&&... args) {
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// use same overload resolution matching as all other parts of the framework
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return overload_match_arity<decltype(void_call<T, TypeLists>::call)...>(
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std::forward<Match>(matchfx), L, fxarity, start, std::forward<Args>(args)...);
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}
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template <typename T, bool checked, bool clean_stack, typename... TypeLists>
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inline int construct_trampolined(lua_State* L) {
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static const auto& meta = usertype_traits<T>::metatable();
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int argcount = lua_gettop(L);
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call_syntax syntax = argcount > 0 ? stack::get_call_syntax(L, usertype_traits<T>::user_metatable(), 1) : call_syntax::dot;
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argcount -= static_cast<int>(syntax);
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T* obj = detail::usertype_allocate<T>(L);
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reference userdataref(L, -1);
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stack::stack_detail::undefined_metatable umf(L, &meta[0], &stack::stack_detail::set_undefined_methods_on<T>);
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// put userdata at the first index
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lua_insert(L, 1);
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construct_match<T, TypeLists...>(constructor_match<T, checked, clean_stack>(obj, userdataref, umf), L, argcount, 1 + static_cast<int>(syntax));
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userdataref.push();
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return 1;
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}
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template <typename T, bool checked, bool clean_stack, typename... TypeLists>
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inline int construct(lua_State* L) {
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return detail::static_trampoline<&construct_trampolined<T, checked, clean_stack, TypeLists...>>(L);
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}
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template <typename F, bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename = void>
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struct agnostic_lua_call_wrapper {
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template <typename Fx, typename... Args>
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static int call(lua_State* L, Fx&& f, Args&&... args) {
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using uFx = meta::unqualified_t<Fx>;
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static constexpr bool is_ref = is_lua_reference_v<uFx>;
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if constexpr (is_ref) {
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if constexpr (is_index) {
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return stack::push(L, std::forward<Fx>(f), std::forward<Args>(args)...);
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}
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else {
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std::forward<Fx>(f) = stack::unqualified_get<F>(L, boost + (is_variable ? 3 : 1));
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return 0;
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}
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}
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else {
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using wrap = wrapper<uFx>;
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using traits_type = typename wrap::traits_type;
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using fp_t = typename traits_type::function_pointer_type;
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constexpr bool is_function_pointer_convertible = std::is_class_v<uFx> && std::is_convertible_v<std::decay_t<Fx>, fp_t>;
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if constexpr (is_function_pointer_convertible) {
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fp_t fx = f;
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return agnostic_lua_call_wrapper<fp_t, is_index, is_variable, checked, boost, clean_stack> {}.call(
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L, fx, std::forward<Args>(args)...);
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}
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else {
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using returns_list = typename wrap::returns_list;
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using args_list = typename wrap::free_args_list;
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using caller = typename wrap::caller;
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return stack::call_into_lua<checked, clean_stack>(
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returns_list(), args_list(), L, boost + 1, caller(), std::forward<Fx>(f), std::forward<Args>(args)...);
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}
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}
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}
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};
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template <typename T, bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
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struct agnostic_lua_call_wrapper<var_wrapper<T>, is_index, is_variable, checked, boost, clean_stack, C> {
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template <typename F>
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static int call(lua_State* L, F&& f) {
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if constexpr (is_index) {
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constexpr bool is_stack = is_stack_based_v<meta::unqualified_t<decltype(detail::unwrap(f.value()))>>;
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if constexpr (clean_stack && !is_stack) {
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lua_settop(L, 0);
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}
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return stack::push_reference(L, detail::unwrap(f.value()));
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}
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else {
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if constexpr (std::is_const_v<meta::unwrapped_t<T>>) {
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(void)f;
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return luaL_error(L, "sol: cannot write to a readonly (const) variable");
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}
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else {
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using R = meta::unwrapped_t<T>;
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if constexpr (std::is_assignable_v<std::add_lvalue_reference_t<meta::unqualified_t<R>>, R>) {
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detail::unwrap(f.value()) = stack::unqualified_get<meta::unwrapped_t<T>>(L, boost + (is_variable ? 3 : 1));
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if (clean_stack) {
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lua_settop(L, 0);
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}
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return 0;
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}
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else {
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return luaL_error(L, "sol: cannot write to this variable: copy assignment/constructor not available");
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}
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}
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}
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}
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};
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template <bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
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struct agnostic_lua_call_wrapper<lua_CFunction_ref, is_index, is_variable, checked, boost, clean_stack, C> {
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static int call(lua_State* L, lua_CFunction_ref f) {
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return f(L);
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}
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};
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template <bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
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struct agnostic_lua_call_wrapper<lua_CFunction, is_index, is_variable, checked, boost, clean_stack, C> {
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static int call(lua_State* L, lua_CFunction f) {
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return f(L);
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}
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};
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|
#if SOL_IS_ON(SOL_USE_NOEXCEPT_FUNCTION_TYPE)
|
|
template <bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
|
|
struct agnostic_lua_call_wrapper<detail::lua_CFunction_noexcept, is_index, is_variable, checked, boost, clean_stack, C> {
|
|
static int call(lua_State* L, detail::lua_CFunction_noexcept f) {
|
|
return f(L);
|
|
}
|
|
};
|
|
#endif // noexcept function types
|
|
|
|
template <bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
|
|
struct agnostic_lua_call_wrapper<detail::no_prop, is_index, is_variable, checked, boost, clean_stack, C> {
|
|
static int call(lua_State* L, const detail::no_prop&) {
|
|
return luaL_error(L, is_index ? "sol: cannot read from a writeonly property" : "sol: cannot write to a readonly property");
|
|
}
|
|
};
|
|
|
|
template <bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
|
|
struct agnostic_lua_call_wrapper<no_construction, is_index, is_variable, checked, boost, clean_stack, C> {
|
|
static int call(lua_State* L, const no_construction&) {
|
|
return function_detail::no_construction_error(L);
|
|
}
|
|
};
|
|
|
|
template <typename... Args, bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
|
|
struct agnostic_lua_call_wrapper<bases<Args...>, is_index, is_variable, checked, boost, clean_stack, C> {
|
|
static int call(lua_State*, const bases<Args...>&) {
|
|
// Uh. How did you even call this, lul
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
template <typename T, bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
|
|
struct agnostic_lua_call_wrapper<std::reference_wrapper<T>, is_index, is_variable, checked, boost, clean_stack, C> {
|
|
static int call(lua_State* L, std::reference_wrapper<T> f) {
|
|
agnostic_lua_call_wrapper<T, is_index, is_variable, checked, boost, clean_stack> alcw {};
|
|
return alcw.call(L, f.get());
|
|
}
|
|
};
|
|
|
|
template <typename T, typename F, bool is_index, bool is_variable, bool checked = detail::default_safe_function_calls, int boost = 0,
|
|
bool clean_stack = true, typename = void>
|
|
struct lua_call_wrapper {
|
|
template <typename Fx, typename... Args>
|
|
static int call(lua_State* L, Fx&& fx, Args&&... args) {
|
|
if constexpr (std::is_member_function_pointer_v<F>) {
|
|
using wrap = wrapper<F>;
|
|
using object_type = typename wrap::object_type;
|
|
if constexpr (sizeof...(Args) < 1) {
|
|
using Ta = meta::conditional_t<std::is_void_v<T>, object_type, T>;
|
|
static_assert(std::is_base_of_v<object_type, Ta>,
|
|
"It seems like you might have accidentally bound a class type with a member function method that does not correspond to the "
|
|
"class. For example, there could be a small type in your new_usertype<T>(...) binding, where you specify one class \"T\" "
|
|
"but then bind member methods from a complete unrelated class. Check things over!");
|
|
#if SOL_IS_ON(SOL_SAFE_USERTYPE)
|
|
auto maybeo = stack::check_get<Ta*>(L, 1);
|
|
if (!maybeo || maybeo.value() == nullptr) {
|
|
return luaL_error(L,
|
|
"sol: received nil for 'self' argument (use ':' for accessing member functions, make sure member variables are "
|
|
"preceeded by the "
|
|
"actual object with '.' syntax)");
|
|
}
|
|
object_type* o = static_cast<object_type*>(maybeo.value());
|
|
return call(L, std::forward<Fx>(fx), *o);
|
|
#else
|
|
object_type& o = static_cast<object_type&>(*stack::unqualified_get<non_null<Ta*>>(L, 1));
|
|
return call(L, std::forward<Fx>(fx), o);
|
|
#endif // Safety
|
|
}
|
|
else {
|
|
using returns_list = typename wrap::returns_list;
|
|
using args_list = typename wrap::args_list;
|
|
using caller = typename wrap::caller;
|
|
return stack::call_into_lua<checked, clean_stack>(
|
|
returns_list(), args_list(), L, boost + (is_variable ? 3 : 2), caller(), std::forward<Fx>(fx), std::forward<Args>(args)...);
|
|
}
|
|
}
|
|
else if constexpr (std::is_member_object_pointer_v<F>) {
|
|
using wrap = wrapper<F>;
|
|
using object_type = typename wrap::object_type;
|
|
if constexpr (is_index) {
|
|
if constexpr (sizeof...(Args) < 1) {
|
|
using Ta = meta::conditional_t<std::is_void_v<T>, object_type, T>;
|
|
static_assert(std::is_base_of_v<object_type, Ta>,
|
|
"It seems like you might have accidentally bound a class type with a member function method that does not correspond "
|
|
"to the class. For example, there could be a small type in your new_usertype<T>(...) binding, where you specify one "
|
|
"class \"T\" but then bind member methods from a complete unrelated class. Check things over!");
|
|
#if SOL_IS_ON(SOL_SAFE_USERTYPE)
|
|
auto maybeo = stack::check_get<Ta*>(L, 1);
|
|
if (!maybeo || maybeo.value() == nullptr) {
|
|
if (is_variable) {
|
|
return luaL_error(L, "sol: 'self' argument is lua_nil (bad '.' access?)");
|
|
}
|
|
return luaL_error(L, "sol: 'self' argument is lua_nil (pass 'self' as first argument)");
|
|
}
|
|
object_type* o = static_cast<object_type*>(maybeo.value());
|
|
return call(L, std::forward<Fx>(fx), *o);
|
|
#else
|
|
object_type& o = static_cast<object_type&>(*stack::get<non_null<Ta*>>(L, 1));
|
|
return call(L, std::forward<Fx>(fx), o);
|
|
#endif // Safety
|
|
}
|
|
else {
|
|
using returns_list = typename wrap::returns_list;
|
|
using caller = typename wrap::caller;
|
|
return stack::call_into_lua<checked, clean_stack>(returns_list(),
|
|
types<>(),
|
|
L,
|
|
boost + (is_variable ? 3 : 2),
|
|
caller(),
|
|
std::forward<Fx>(fx),
|
|
std::forward<Args>(args)...);
|
|
}
|
|
}
|
|
else {
|
|
using traits_type = lua_bind_traits<F>;
|
|
using return_type = typename traits_type::return_type;
|
|
constexpr bool ret_is_const = std::is_const_v<std::remove_reference_t<return_type>>;
|
|
if constexpr (ret_is_const) {
|
|
(void)fx;
|
|
(void)detail::swallow { 0, (static_cast<void>(args), 0)... };
|
|
return luaL_error(L, "sol: cannot write to a readonly (const) variable");
|
|
}
|
|
else {
|
|
using u_return_type = meta::unqualified_t<return_type>;
|
|
constexpr bool is_assignable = std::is_copy_assignable_v<u_return_type> || std::is_array_v<u_return_type>;
|
|
if constexpr (!is_assignable) {
|
|
(void)fx;
|
|
(void)detail::swallow { 0, ((void)args, 0)... };
|
|
return luaL_error(L, "sol: cannot write to this variable: copy assignment/constructor not available");
|
|
}
|
|
else {
|
|
using args_list = typename wrap::args_list;
|
|
using caller = typename wrap::caller;
|
|
if constexpr (sizeof...(Args) > 0) {
|
|
return stack::call_into_lua<checked, clean_stack>(types<void>(),
|
|
args_list(),
|
|
L,
|
|
boost + (is_variable ? 3 : 2),
|
|
caller(),
|
|
std::forward<Fx>(fx),
|
|
std::forward<Args>(args)...);
|
|
}
|
|
else {
|
|
using Ta = meta::conditional_t<std::is_void_v<T>, object_type, T>;
|
|
#if SOL_IS_ON(SOL_SAFE_USERTYPE)
|
|
auto maybeo = stack::check_get<Ta*>(L, 1);
|
|
if (!maybeo || maybeo.value() == nullptr) {
|
|
if (is_variable) {
|
|
return luaL_error(L, "sol: received nil for 'self' argument (bad '.' access?)");
|
|
}
|
|
return luaL_error(L, "sol: received nil for 'self' argument (pass 'self' as first argument)");
|
|
}
|
|
object_type* po = static_cast<object_type*>(maybeo.value());
|
|
object_type& o = *po;
|
|
#else
|
|
object_type& o = static_cast<object_type&>(*stack::get<non_null<Ta*>>(L, 1));
|
|
#endif // Safety
|
|
|
|
return stack::call_into_lua<checked, clean_stack>(
|
|
types<void>(), args_list(), L, boost + (is_variable ? 3 : 2), caller(), std::forward<Fx>(fx), o);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
agnostic_lua_call_wrapper<F, is_index, is_variable, checked, boost, clean_stack> alcw {};
|
|
return alcw.call(L, std::forward<Fx>(fx), std::forward<Args>(args)...);
|
|
}
|
|
}
|
|
};
|
|
|
|
template <typename T, typename F, bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
|
|
struct lua_call_wrapper<T, readonly_wrapper<F>, is_index, is_variable, checked, boost, clean_stack, C> {
|
|
using traits_type = lua_bind_traits<F>;
|
|
using wrap = wrapper<F>;
|
|
using object_type = typename wrap::object_type;
|
|
|
|
static int call(lua_State* L, readonly_wrapper<F>&& rw) {
|
|
if constexpr (!is_index) {
|
|
(void)rw;
|
|
return luaL_error(L, "sol: cannot write to a sol::readonly variable");
|
|
}
|
|
else {
|
|
lua_call_wrapper<T, F, true, is_variable, checked, boost, clean_stack, C> lcw;
|
|
return lcw.call(L, std::move(rw.value()));
|
|
}
|
|
}
|
|
|
|
static int call(lua_State* L, readonly_wrapper<F>&& rw, object_type& o) {
|
|
if constexpr (!is_index) {
|
|
(void)o;
|
|
return call(L, std::move(rw));
|
|
}
|
|
else {
|
|
lua_call_wrapper<T, F, true, is_variable, checked, boost, clean_stack, C> lcw;
|
|
return lcw.call(L, rw.value(), o);
|
|
}
|
|
}
|
|
|
|
static int call(lua_State* L, const readonly_wrapper<F>& rw) {
|
|
if constexpr (!is_index) {
|
|
(void)rw;
|
|
return luaL_error(L, "sol: cannot write to a sol::readonly variable");
|
|
}
|
|
else {
|
|
lua_call_wrapper<T, F, true, is_variable, checked, boost, clean_stack, C> lcw;
|
|
return lcw.call(L, rw.value());
|
|
}
|
|
}
|
|
|
|
static int call(lua_State* L, const readonly_wrapper<F>& rw, object_type& o) {
|
|
if constexpr (!is_index) {
|
|
(void)o;
|
|
return call(L, rw);
|
|
}
|
|
else {
|
|
lua_call_wrapper<T, F, true, is_variable, checked, boost, clean_stack, C> lcw;
|
|
return lcw.call(L, rw.value(), o);
|
|
}
|
|
}
|
|
};
|
|
|
|
template <typename T, typename... Args, bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
|
|
struct lua_call_wrapper<T, constructor_list<Args...>, is_index, is_variable, checked, boost, clean_stack, C> {
|
|
typedef constructor_list<Args...> F;
|
|
|
|
static int call(lua_State* L, F&) {
|
|
const auto& meta = usertype_traits<T>::metatable();
|
|
int argcount = lua_gettop(L);
|
|
call_syntax syntax = argcount > 0 ? stack::get_call_syntax(L, usertype_traits<T>::user_metatable(), 1) : call_syntax::dot;
|
|
argcount -= static_cast<int>(syntax);
|
|
|
|
T* obj = detail::usertype_allocate<T>(L);
|
|
reference userdataref(L, -1);
|
|
stack::stack_detail::undefined_metatable umf(L, &meta[0], &stack::stack_detail::set_undefined_methods_on<T>);
|
|
|
|
// put userdata at the first index
|
|
lua_insert(L, 1);
|
|
// Because of the way constructors work,
|
|
// we have to kill the data, but only if the cosntructor is successfulyl invoked...
|
|
// if it's not successfully invoked and we panic,
|
|
// we cannot actually deallcoate/delete the data.
|
|
construct_match<T, Args...>(
|
|
constructor_match<T, checked, clean_stack>(obj, userdataref, umf), L, argcount, boost + 1 + 1 + static_cast<int>(syntax));
|
|
|
|
userdataref.push();
|
|
return 1;
|
|
}
|
|
};
|
|
|
|
template <typename T, typename... Cxs, bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
|
|
struct lua_call_wrapper<T, constructor_wrapper<Cxs...>, is_index, is_variable, checked, boost, clean_stack, C> {
|
|
typedef constructor_wrapper<Cxs...> F;
|
|
|
|
struct onmatch {
|
|
template <typename Fx, std::size_t I, typename... R, typename... Args>
|
|
int operator()(types<Fx>, meta::index_value<I>, types<R...> r, types<Args...> a, lua_State* L, int, int start, F& f) {
|
|
const auto& meta = usertype_traits<T>::metatable();
|
|
T* obj = detail::usertype_allocate<T>(L);
|
|
reference userdataref(L, -1);
|
|
stack::stack_detail::undefined_metatable umf(L, &meta[0], &stack::stack_detail::set_undefined_methods_on<T>);
|
|
umf();
|
|
|
|
auto& func = std::get<I>(f.functions);
|
|
// put userdata at the first index
|
|
lua_insert(L, 1);
|
|
stack::call_into_lua<checked, clean_stack>(r, a, L, boost + 1 + start, func, detail::implicit_wrapper<T>(obj));
|
|
|
|
userdataref.push();
|
|
return 1;
|
|
}
|
|
};
|
|
|
|
static int call(lua_State* L, F& f) {
|
|
call_syntax syntax = stack::get_call_syntax(L, usertype_traits<T>::user_metatable(), 1);
|
|
int syntaxval = static_cast<int>(syntax);
|
|
int argcount = lua_gettop(L) - syntaxval;
|
|
return construct_match<T, meta::pop_front_type_t<meta::function_args_t<Cxs>>...>(onmatch(), L, argcount, 1 + syntaxval, f);
|
|
}
|
|
};
|
|
|
|
template <typename T, typename Fx, bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
|
|
struct lua_call_wrapper<T, destructor_wrapper<Fx>, is_index, is_variable, checked, boost, clean_stack, C> {
|
|
|
|
template <typename F>
|
|
static int call(lua_State* L, F&& f) {
|
|
if constexpr (std::is_void_v<Fx>) {
|
|
return detail::usertype_alloc_destroy<T>(L);
|
|
}
|
|
else {
|
|
using uFx = meta::unqualified_t<Fx>;
|
|
lua_call_wrapper<T, uFx, is_index, is_variable, checked, boost, clean_stack> lcw {};
|
|
return lcw.call(L, std::forward<F>(f).fx);
|
|
}
|
|
}
|
|
};
|
|
|
|
template <typename T, typename... Fs, bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
|
|
struct lua_call_wrapper<T, overload_set<Fs...>, is_index, is_variable, checked, boost, clean_stack, C> {
|
|
typedef overload_set<Fs...> F;
|
|
|
|
struct on_match {
|
|
template <typename Fx, std::size_t I, typename... R, typename... Args>
|
|
int operator()(types<Fx>, meta::index_value<I>, types<R...>, types<Args...>, lua_State* L, int, int, F& fx) {
|
|
auto& f = std::get<I>(fx.functions);
|
|
return lua_call_wrapper<T, Fx, is_index, is_variable, checked, boost> {}.call(L, f);
|
|
}
|
|
};
|
|
|
|
static int call(lua_State* L, F& fx) {
|
|
return overload_match_arity<Fs...>(on_match(), L, lua_gettop(L), 1, fx);
|
|
}
|
|
};
|
|
|
|
template <typename T, typename... Fs, bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
|
|
struct lua_call_wrapper<T, factory_wrapper<Fs...>, is_index, is_variable, checked, boost, clean_stack, C> {
|
|
typedef factory_wrapper<Fs...> F;
|
|
|
|
struct on_match {
|
|
template <typename Fx, std::size_t I, typename... R, typename... Args>
|
|
int operator()(types<Fx>, meta::index_value<I>, types<R...>, types<Args...>, lua_State* L, int, int, F& fx) {
|
|
auto& f = std::get<I>(fx.functions);
|
|
return lua_call_wrapper<T, Fx, is_index, is_variable, checked, boost, clean_stack> {}.call(L, f);
|
|
}
|
|
};
|
|
|
|
static int call(lua_State* L, F& fx) {
|
|
return overload_match_arity<Fs...>(on_match(), L, lua_gettop(L) - boost, 1 + boost, fx);
|
|
}
|
|
};
|
|
|
|
template <typename T, typename R, typename W, bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
|
|
struct lua_call_wrapper<T, property_wrapper<R, W>, is_index, is_variable, checked, boost, clean_stack, C> {
|
|
typedef meta::conditional_t<is_index, R, W> P;
|
|
typedef meta::unqualified_t<P> U;
|
|
typedef wrapper<U> wrap;
|
|
typedef lua_bind_traits<U> traits_type;
|
|
typedef meta::unqualified_t<typename traits_type::template arg_at<0>> object_type;
|
|
|
|
template <typename F, typename... Args>
|
|
static int call(lua_State* L, F&& f, Args&&... args) {
|
|
constexpr bool is_specialized = meta::any<std::is_same<U, detail::no_prop>,
|
|
meta::is_specialization_of<U, var_wrapper>,
|
|
meta::is_specialization_of<U, constructor_wrapper>,
|
|
meta::is_specialization_of<U, constructor_list>,
|
|
std::is_member_pointer<U>>::value;
|
|
if constexpr (is_specialized) {
|
|
if constexpr (is_index) {
|
|
decltype(auto) p = f.read();
|
|
lua_call_wrapper<T, meta::unqualified_t<decltype(p)>, is_index, is_variable, checked, boost, clean_stack> lcw {};
|
|
return lcw.call(L, p, std::forward<Args>(args)...);
|
|
}
|
|
else {
|
|
decltype(auto) p = f.write();
|
|
lua_call_wrapper<T, meta::unqualified_t<decltype(p)>, is_index, is_variable, checked, boost, clean_stack> lcw {};
|
|
return lcw.call(L, p, std::forward<Args>(args)...);
|
|
}
|
|
}
|
|
else {
|
|
constexpr bool non_class_object_type = meta::any<std::is_void<object_type>,
|
|
meta::boolean<lua_type_of<meta::unwrap_unqualified_t<object_type>>::value != type::userdata>>::value;
|
|
if constexpr (non_class_object_type) {
|
|
// The type being void means we don't have any arguments, so it might be a free functions?
|
|
using args_list = typename traits_type::free_args_list;
|
|
using returns_list = typename wrap::returns_list;
|
|
using caller = typename wrap::caller;
|
|
if constexpr (is_index) {
|
|
decltype(auto) pf = f.read();
|
|
return stack::call_into_lua<checked, clean_stack>(
|
|
returns_list(), args_list(), L, boost + (is_variable ? 3 : 2), caller(), pf);
|
|
}
|
|
else {
|
|
decltype(auto) pf = f.write();
|
|
return stack::call_into_lua<checked, clean_stack>(
|
|
returns_list(), args_list(), L, boost + (is_variable ? 3 : 2), caller(), pf);
|
|
}
|
|
}
|
|
else {
|
|
using args_list = meta::pop_front_type_t<typename traits_type::free_args_list>;
|
|
using Ta = T;
|
|
using Oa = std::remove_pointer_t<object_type>;
|
|
#if SOL_IS_ON(SOL_SAFE_USERTYPE)
|
|
auto maybeo = stack::check_get<Ta*>(L, 1);
|
|
if (!maybeo || maybeo.value() == nullptr) {
|
|
if (is_variable) {
|
|
return luaL_error(L, "sol: 'self' argument is lua_nil (bad '.' access?)");
|
|
}
|
|
return luaL_error(L, "sol: 'self' argument is lua_nil (pass 'self' as first argument)");
|
|
}
|
|
Oa* o = static_cast<Oa*>(maybeo.value());
|
|
#else
|
|
Oa* o = static_cast<Oa*>(stack::get<non_null<Ta*>>(L, 1));
|
|
#endif // Safety
|
|
using returns_list = typename wrap::returns_list;
|
|
using caller = typename wrap::caller;
|
|
if constexpr (is_index) {
|
|
decltype(auto) pf = f.read();
|
|
return stack::call_into_lua<checked, clean_stack>(
|
|
returns_list(), args_list(), L, boost + (is_variable ? 3 : 2), caller(), pf, detail::implicit_wrapper<Oa>(*o));
|
|
}
|
|
else {
|
|
decltype(auto) pf = f.write();
|
|
return stack::call_into_lua<checked, clean_stack>(
|
|
returns_list(), args_list(), L, boost + (is_variable ? 3 : 2), caller(), pf, detail::implicit_wrapper<Oa>(*o));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
template <typename T, typename V, bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
|
|
struct lua_call_wrapper<T, protect_t<V>, is_index, is_variable, checked, boost, clean_stack, C> {
|
|
typedef protect_t<V> F;
|
|
|
|
template <typename... Args>
|
|
static int call(lua_State* L, F& fx, Args&&... args) {
|
|
return lua_call_wrapper<T, V, is_index, is_variable, true, boost, clean_stack> {}.call(L, fx.value, std::forward<Args>(args)...);
|
|
}
|
|
};
|
|
|
|
template <typename T, typename F, typename... Policies, bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
|
|
struct lua_call_wrapper<T, policy_wrapper<F, Policies...>, is_index, is_variable, checked, boost, clean_stack, C> {
|
|
typedef policy_wrapper<F, Policies...> P;
|
|
|
|
template <std::size_t... In>
|
|
static int call(std::index_sequence<In...>, lua_State* L, P& fx) {
|
|
int pushed = lua_call_wrapper<T, F, is_index, is_variable, checked, boost, false, C> {}.call(L, fx.value);
|
|
(void)detail::swallow { int(), (policy_detail::handle_policy(std::get<In>(fx.policies), L, pushed), int())... };
|
|
return pushed;
|
|
}
|
|
|
|
static int call(lua_State* L, P& fx) {
|
|
typedef typename P::indices indices;
|
|
return call(indices(), L, fx);
|
|
}
|
|
};
|
|
|
|
template <typename T, typename Y, bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
|
|
struct lua_call_wrapper<T, yielding_t<Y>, is_index, is_variable, checked, boost, clean_stack, C> {
|
|
template <typename F>
|
|
static int call(lua_State* L, F&& f) {
|
|
return lua_call_wrapper<T, meta::unqualified_t<Y>, is_index, is_variable, checked, boost, clean_stack> {}.call(L, f.func);
|
|
}
|
|
};
|
|
|
|
template <typename T, typename Sig, typename P, bool is_index, bool is_variable, bool checked, int boost, bool clean_stack, typename C>
|
|
struct lua_call_wrapper<T, function_arguments<Sig, P>, is_index, is_variable, checked, boost, clean_stack, C> {
|
|
static int call(lua_State* L, const function_arguments<Sig, P>& f) {
|
|
lua_call_wrapper<T, meta::unqualified_t<P>, is_index, is_variable, checked, boost, clean_stack> lcw {};
|
|
return lcw.call(L, std::get<0>(f.arguments));
|
|
}
|
|
|
|
static int call(lua_State* L, function_arguments<Sig, P>& f) {
|
|
lua_call_wrapper<T, meta::unqualified_t<P>, is_index, is_variable, checked, boost, clean_stack> lcw {};
|
|
return lcw.call(L, std::get<0>(f.arguments));
|
|
}
|
|
|
|
static int call(lua_State* L, function_arguments<Sig, P>&& f) {
|
|
lua_call_wrapper<T, meta::unqualified_t<P>, is_index, is_variable, checked, boost, clean_stack> lcw {};
|
|
return lcw.call(L, std::get<0>(std::move(f.arguments)));
|
|
}
|
|
};
|
|
|
|
template <typename T, bool is_index, bool is_variable, int boost = 0, bool checked = detail::default_safe_function_calls, bool clean_stack = true,
|
|
typename Fx, typename... Args>
|
|
inline int call_wrapped(lua_State* L, Fx&& fx, Args&&... args) {
|
|
using uFx = meta::unqualified_t<Fx>;
|
|
if constexpr (meta::is_specialization_of_v<uFx, yielding_t>) {
|
|
using real_fx = meta::unqualified_t<decltype(std::forward<Fx>(fx).func)>;
|
|
lua_call_wrapper<T, real_fx, is_index, is_variable, checked, boost, clean_stack> lcw {};
|
|
return lcw.call(L, std::forward<Fx>(fx).func, std::forward<Args>(args)...);
|
|
}
|
|
else {
|
|
lua_call_wrapper<T, uFx, is_index, is_variable, checked, boost, clean_stack> lcw {};
|
|
return lcw.call(L, std::forward<Fx>(fx), std::forward<Args>(args)...);
|
|
}
|
|
}
|
|
|
|
template <typename T, bool is_index, bool is_variable, typename F, int start = 1, bool checked = detail::default_safe_function_calls,
|
|
bool clean_stack = true>
|
|
inline int call_user(lua_State* L) {
|
|
auto& fx = stack::unqualified_get<user<F>>(L, upvalue_index(start));
|
|
using uFx = meta::unqualified_t<F>;
|
|
int nr = call_wrapped<T, is_index, is_variable, 0, checked, clean_stack>(L, fx);
|
|
if constexpr (meta::is_specialization_of_v<uFx, yielding_t>) {
|
|
return lua_yield(L, nr);
|
|
}
|
|
else {
|
|
return nr;
|
|
}
|
|
}
|
|
|
|
template <typename T, typename = void>
|
|
struct is_var_bind : std::false_type { };
|
|
|
|
template <typename T>
|
|
struct is_var_bind<T, std::enable_if_t<std::is_member_object_pointer<T>::value>> : std::true_type { };
|
|
|
|
template <typename T>
|
|
struct is_var_bind<T, std::enable_if_t<is_lua_reference_or_proxy<T>::value>> : std::true_type { };
|
|
|
|
template <>
|
|
struct is_var_bind<detail::no_prop> : std::true_type { };
|
|
|
|
template <typename R, typename W>
|
|
struct is_var_bind<property_wrapper<R, W>> : std::true_type { };
|
|
|
|
template <typename T>
|
|
struct is_var_bind<var_wrapper<T>> : std::true_type { };
|
|
|
|
template <typename T>
|
|
struct is_var_bind<readonly_wrapper<T>> : is_var_bind<meta::unqualified_t<T>> { };
|
|
|
|
template <typename F, typename... Policies>
|
|
struct is_var_bind<policy_wrapper<F, Policies...>> : is_var_bind<meta::unqualified_t<F>> { };
|
|
} // namespace call_detail
|
|
|
|
template <typename T>
|
|
struct is_variable_binding : call_detail::is_var_bind<meta::unqualified_t<T>> { };
|
|
|
|
template <typename T>
|
|
using is_var_wrapper = meta::is_specialization_of<T, var_wrapper>;
|
|
|
|
template <typename T>
|
|
struct is_function_binding : meta::neg<is_variable_binding<T>> { };
|
|
|
|
} // namespace sol
|
|
|
|
#endif // SOL_CALL_HPP
|