mirror of
https://github.com/ThePhD/sol2.git
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497 lines
19 KiB
C++
497 lines
19 KiB
C++
// The MIT License (MIT)
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// Copyright (c) 2013-2016 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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#ifndef SOL_TABLE_CORE_HPP
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#define SOL_TABLE_CORE_HPP
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#include "proxy.hpp"
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#include "stack.hpp"
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#include "function_types.hpp"
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#include "usertype.hpp"
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#include "table_iterator.hpp"
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namespace sol {
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namespace detail {
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template <std::size_t n>
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struct clean { lua_State* L; clean(lua_State* luastate) : L(luastate) {} ~clean() { lua_pop(L, static_cast<int>(n)); } };
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struct ref_clean { lua_State* L; int& n; ref_clean(lua_State* luastate, int& n) : L(luastate), n(n) {} ~ref_clean() { lua_pop(L, static_cast<int>(n)); } };
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inline int fail_on_newindex(lua_State* L) {
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return luaL_error(L, "sol: cannot modify the elements of an enumeration table");
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}
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}
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struct new_table {
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int sequence_hint = 0;
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int map_hint = 0;
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new_table() = default;
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new_table(const new_table&) = default;
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new_table(new_table&&) = default;
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new_table& operator=(const new_table&) = default;
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new_table& operator=(new_table&&) = default;
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new_table(int sequence_hint, int map_hint = 0) : sequence_hint(sequence_hint), map_hint(map_hint) {}
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};
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const new_table create = new_table{};
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template <bool top_level, typename base_type>
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class basic_table_core : public basic_object_base<base_type> {
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typedef basic_object_base<base_type> base_t;
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friend class state;
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friend class state_view;
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template <typename... Args>
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using is_global = meta::all<meta::boolean<top_level>, meta::is_c_str<Args>...>;
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template<typename Fx>
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void for_each(std::true_type, Fx&& fx) const {
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auto pp = stack::push_pop(*this);
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stack::push(base_t::lua_state(), lua_nil);
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while (lua_next(base_t::lua_state(), -2)) {
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sol::object key(base_t::lua_state(), -2);
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sol::object value(base_t::lua_state(), -1);
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std::pair<sol::object&, sol::object&> keyvalue(key, value);
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auto pn = stack::pop_n(base_t::lua_state(), 1);
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fx(keyvalue);
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}
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}
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template<typename Fx>
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void for_each(std::false_type, Fx&& fx) const {
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auto pp = stack::push_pop(*this);
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stack::push(base_t::lua_state(), lua_nil);
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while (lua_next(base_t::lua_state(), -2)) {
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sol::object key(base_t::lua_state(), -2);
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sol::object value(base_t::lua_state(), -1);
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auto pn = stack::pop_n(base_t::lua_state(), 1);
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fx(key, value);
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}
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}
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template<typename Ret0, typename Ret1, typename... Ret, std::size_t... I, typename Keys>
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auto tuple_get(types<Ret0, Ret1, Ret...>, std::index_sequence<0, 1, I...>, Keys&& keys) const
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-> decltype(stack::pop<std::tuple<Ret0, Ret1, Ret...>>(nullptr)) {
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typedef decltype(stack::pop<std::tuple<Ret0, Ret1, Ret...>>(nullptr)) Tup;
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return Tup(
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traverse_get_optional<top_level, Ret0>(meta::is_specialization_of<sol::optional, meta::unqualified_t<Ret0>>(), detail::forward_get<0>(keys)),
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traverse_get_optional<top_level, Ret1>(meta::is_specialization_of<sol::optional, meta::unqualified_t<Ret1>>(), detail::forward_get<1>(keys)),
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traverse_get_optional<top_level, Ret>(meta::is_specialization_of<sol::optional, meta::unqualified_t<Ret>>(), detail::forward_get<I>(keys))...
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);
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}
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template<typename Ret, std::size_t I, typename Keys>
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decltype(auto) tuple_get(types<Ret>, std::index_sequence<I>, Keys&& keys) const {
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return traverse_get_optional<top_level, Ret>(meta::is_specialization_of<sol::optional, meta::unqualified_t<Ret>>(), detail::forward_get<I>(keys));
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}
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template<typename Pairs, std::size_t... I>
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void tuple_set(std::index_sequence<I...>, Pairs&& pairs) {
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auto pp = stack::push_pop<top_level && (is_global<decltype(detail::forward_get<I * 2>(pairs))...>::value)>(*this);
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void(detail::swallow{ (stack::set_field<top_level>(base_t::lua_state(),
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detail::forward_get<I * 2>(pairs),
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detail::forward_get<I * 2 + 1>(pairs),
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lua_gettop(base_t::lua_state())
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), 0)... });
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}
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template <bool global, typename T, typename Key>
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decltype(auto) traverse_get_deep(Key&& key) const {
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stack::get_field<global>(base_t::lua_state(), std::forward<Key>(key));
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return stack::get<T>(base_t::lua_state());
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}
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template <bool global, typename T, typename Key, typename... Keys>
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decltype(auto) traverse_get_deep(Key&& key, Keys&&... keys) const {
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stack::get_field<global>(base_t::lua_state(), std::forward<Key>(key));
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return traverse_get_deep<false, T>(std::forward<Keys>(keys)...);
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}
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template <bool global, typename T, std::size_t I, typename Key>
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decltype(auto) traverse_get_deep_optional(int& popcount, Key&& key) const {
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typedef decltype(stack::get<T>(base_t::lua_state())) R;
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auto p = stack::probe_get_field<global>(base_t::lua_state(), std::forward<Key>(key), lua_gettop(base_t::lua_state()));
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popcount += p.levels;
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if (!p.success)
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return R(nullopt);
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return stack::get<T>(base_t::lua_state());
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}
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template <bool global, typename T, std::size_t I, typename Key, typename... Keys>
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decltype(auto) traverse_get_deep_optional(int& popcount, Key&& key, Keys&&... keys) const {
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auto p = I > 0 ? stack::probe_get_field<global>(base_t::lua_state(), std::forward<Key>(key), -1) : stack::probe_get_field<global>(base_t::lua_state(), std::forward<Key>(key), lua_gettop(base_t::lua_state()));
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popcount += p.levels;
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if (!p.success)
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return T(nullopt);
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return traverse_get_deep_optional<false, T, I + 1>(popcount, std::forward<Keys>(keys)...);
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}
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template <bool global, typename T, typename... Keys>
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decltype(auto) traverse_get_optional(std::false_type, Keys&&... keys) const {
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detail::clean<sizeof...(Keys)> c(base_t::lua_state());
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return traverse_get_deep<top_level, T>(std::forward<Keys>(keys)...);
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}
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template <bool global, typename T, typename... Keys>
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decltype(auto) traverse_get_optional(std::true_type, Keys&&... keys) const {
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int popcount = 0;
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detail::ref_clean c(base_t::lua_state(), popcount);
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return traverse_get_deep_optional<top_level, T, 0>(popcount, std::forward<Keys>(keys)...);
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}
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template <bool global, typename Key, typename Value>
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void traverse_set_deep(Key&& key, Value&& value) const {
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stack::set_field<global>(base_t::lua_state(), std::forward<Key>(key), std::forward<Value>(value));
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}
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template <bool global, typename Key, typename... Keys>
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void traverse_set_deep(Key&& key, Keys&&... keys) const {
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stack::get_field<global>(base_t::lua_state(), std::forward<Key>(key));
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traverse_set_deep<false>(std::forward<Keys>(keys)...);
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}
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basic_table_core(lua_State* L, detail::global_tag t) noexcept : base_t(L, t) { }
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public:
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typedef basic_table_iterator<base_type> iterator;
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typedef iterator const_iterator;
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basic_table_core() noexcept = default;
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basic_table_core(const basic_table_core&) = default;
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basic_table_core(basic_table_core&&) = default;
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basic_table_core& operator=(const basic_table_core&) = default;
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basic_table_core& operator=(basic_table_core&&) = default;
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basic_table_core(const stack_reference& r) : basic_table_core(r.lua_state(), r.stack_index()) {}
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basic_table_core(stack_reference&& r) : basic_table_core(r.lua_state(), r.stack_index()) {}
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template <typename T, meta::enable<meta::neg<std::is_integral<meta::unqualified_t<T>>>, meta::neg<std::is_same<meta::unqualified_t<T>, ref_index>>> = meta::enabler>
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basic_table_core(lua_State* L, T&& r) : basic_table_core(L, sol::ref_index(r.registry_index())) {}
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basic_table_core(lua_State* L, new_table nt) : base_t(L, (lua_createtable(L, nt.sequence_hint, nt.map_hint), -1)) {
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if (!std::is_base_of<stack_reference, base_type>::value) {
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lua_pop(L, 1);
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}
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}
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basic_table_core(lua_State* L, int index = -1) : base_t(L, index) {
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#ifdef SOL_CHECK_ARGUMENTS
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stack::check<basic_table_core>(L, index, type_panic);
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#endif // Safety
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}
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basic_table_core(lua_State* L, ref_index index) : base_t(L, index) {
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#ifdef SOL_CHECK_ARGUMENTS
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auto pp = stack::push_pop(*this);
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stack::check<basic_table_core>(L, -1, type_panic);
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#endif // Safety
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}
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template <typename T, meta::enable<meta::neg<meta::any_same<meta::unqualified_t<T>, basic_table_core>>, meta::neg<std::is_same<base_type, stack_reference>>, std::is_base_of<base_type, meta::unqualified_t<T>>> = meta::enabler>
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basic_table_core(T&& r) noexcept : base_t(std::forward<T>(r)) {
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#ifdef SOL_CHECK_ARGUMENTS
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if (!is_table<meta::unqualified_t<T>>::value) {
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auto pp = stack::push_pop(*this);
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stack::check<basic_table_core>(base_t::lua_state(), -1, type_panic);
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}
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#endif // Safety
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}
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iterator begin() const {
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return iterator(*this);
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}
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iterator end() const {
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return iterator();
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}
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const_iterator cbegin() const {
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return begin();
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}
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const_iterator cend() const {
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return end();
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}
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template<typename... Ret, typename... Keys>
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decltype(auto) get(Keys&&... keys) const {
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static_assert(sizeof...(Keys) == sizeof...(Ret), "number of keys and number of return types do not match");
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auto pp = stack::push_pop<is_global<Keys...>::value>(*this);
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return tuple_get(types<Ret...>(), std::make_index_sequence<sizeof...(Ret)>(), std::forward_as_tuple(std::forward<Keys>(keys)...));
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}
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template<typename T, typename Key>
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decltype(auto) get_or(Key&& key, T&& otherwise) const {
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typedef decltype(get<T>("")) U;
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sol::optional<U> option = get<sol::optional<U>>(std::forward<Key>(key));
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if (option) {
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return static_cast<U>(option.value());
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}
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return static_cast<U>(std::forward<T>(otherwise));
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}
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template<typename T, typename Key, typename D>
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decltype(auto) get_or(Key&& key, D&& otherwise) const {
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sol::optional<T> option = get<sol::optional<T>>(std::forward<Key>(key));
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if (option) {
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return static_cast<T>(option.value());
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}
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return static_cast<T>(std::forward<D>(otherwise));
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}
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template <typename T, typename... Keys>
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decltype(auto) traverse_get(Keys&&... keys) const {
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auto pp = stack::push_pop<is_global<Keys...>::value>(*this);
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return traverse_get_optional<top_level, T>(meta::is_specialization_of<sol::optional, meta::unqualified_t<T>>(), std::forward<Keys>(keys)...);
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}
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template <typename... Keys>
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basic_table_core& traverse_set(Keys&&... keys) {
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auto pp = stack::push_pop<is_global<Keys...>::value>(*this);
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auto pn = stack::pop_n(base_t::lua_state(), static_cast<int>(sizeof...(Keys)-2));
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traverse_set_deep<top_level>(std::forward<Keys>(keys)...);
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return *this;
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}
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template<typename... Args>
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basic_table_core& set(Args&&... args) {
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tuple_set(std::make_index_sequence<sizeof...(Args) / 2>(), std::forward_as_tuple(std::forward<Args>(args)...));
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return *this;
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}
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template<typename T>
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basic_table_core& set_usertype(usertype<T>& user) {
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return set_usertype(usertype_traits<T>::name(), user);
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}
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template<typename Key, typename T>
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basic_table_core& set_usertype(Key&& key, usertype<T>& user) {
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return set(std::forward<Key>(key), user);
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}
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template<typename Class, typename... Args>
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basic_table_core& new_usertype(const std::string& name, Args&&... args) {
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usertype<Class> utype(std::forward<Args>(args)...);
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set_usertype(name, utype);
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return *this;
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}
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template<typename Class, typename CTor0, typename... CTor, typename... Args>
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basic_table_core& new_usertype(const std::string& name, Args&&... args) {
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constructors<types<CTor0, CTor...>> ctor{};
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return new_usertype<Class>(name, ctor, std::forward<Args>(args)...);
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}
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template<typename Class, typename... CArgs, typename... Args>
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basic_table_core& new_usertype(const std::string& name, constructors<CArgs...> ctor, Args&&... args) {
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usertype<Class> utype(ctor, std::forward<Args>(args)...);
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set_usertype(name, utype);
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return *this;
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}
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template<typename Class, typename... Args>
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basic_table_core& new_simple_usertype(const std::string& name, Args&&... args) {
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simple_usertype<Class> utype(base_t::lua_state(), std::forward<Args>(args)...);
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set_usertype(name, utype);
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return *this;
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}
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template<typename Class, typename CTor0, typename... CTor, typename... Args>
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basic_table_core& new_simple_usertype(const std::string& name, Args&&... args) {
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constructors<types<CTor0, CTor...>> ctor{};
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return new_simple_usertype<Class>(name, ctor, std::forward<Args>(args)...);
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}
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template<typename Class, typename... CArgs, typename... Args>
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basic_table_core& new_simple_usertype(const std::string& name, constructors<CArgs...> ctor, Args&&... args) {
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simple_usertype<Class> utype(base_t::lua_state(), ctor, std::forward<Args>(args)...);
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set_usertype(name, utype);
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return *this;
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}
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template<typename Class, typename... Args>
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simple_usertype<Class> create_simple_usertype(Args&&... args) {
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simple_usertype<Class> utype(base_t::lua_state(), std::forward<Args>(args)...);
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return utype;
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}
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template<typename Class, typename CTor0, typename... CTor, typename... Args>
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simple_usertype<Class> create_simple_usertype(Args&&... args) {
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constructors<types<CTor0, CTor...>> ctor{};
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return create_simple_usertype<Class>(ctor, std::forward<Args>(args)...);
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}
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template<typename Class, typename... CArgs, typename... Args>
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simple_usertype<Class> create_simple_usertype(constructors<CArgs...> ctor, Args&&... args) {
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simple_usertype<Class> utype(base_t::lua_state(), ctor, std::forward<Args>(args)...);
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return utype;
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}
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template<bool read_only = true, typename... Args>
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basic_table_core& new_enum(const std::string& name, Args&&... args) {
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if (read_only) {
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table idx = create_with(std::forward<Args>(args)...);
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table x = create_with(
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meta_function::new_index, detail::fail_on_newindex,
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meta_function::index, idx
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);
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table target = create_named(name);
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target[metatable_key] = x;
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}
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else {
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create_named(name, std::forward<Args>(args)...);
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}
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return *this;
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}
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template<typename Fx>
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void for_each(Fx&& fx) const {
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typedef meta::is_invokable<Fx(std::pair<sol::object, sol::object>)> is_paired;
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for_each(is_paired(), std::forward<Fx>(fx));
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}
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size_t size() const {
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auto pp = stack::push_pop(*this);
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lua_len(base_t::lua_state(), -1);
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return stack::pop<size_t>(base_t::lua_state());
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}
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bool empty() const {
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return cbegin() == cend();
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}
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template<typename T>
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proxy<basic_table_core&, T> operator[](T&& key) & {
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return proxy<basic_table_core&, T>(*this, std::forward<T>(key));
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}
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template<typename T>
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proxy<const basic_table_core&, T> operator[](T&& key) const & {
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return proxy<const basic_table_core&, T>(*this, std::forward<T>(key));
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}
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template<typename T>
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proxy<basic_table_core, T> operator[](T&& key) && {
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return proxy<basic_table_core, T>(*this, std::forward<T>(key));
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}
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template<typename Sig, typename Key, typename... Args>
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basic_table_core& set_function(Key&& key, Args&&... args) {
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set_fx(types<Sig>(), std::forward<Key>(key), std::forward<Args>(args)...);
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return *this;
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}
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template<typename Key, typename... Args>
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basic_table_core& set_function(Key&& key, Args&&... args) {
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set_fx(types<>(), std::forward<Key>(key), std::forward<Args>(args)...);
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return *this;
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}
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template <typename... Args>
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basic_table_core& add(Args&&... args) {
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auto pp = stack::push_pop(*this);
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(void)detail::swallow{0,
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(stack::set_ref(base_t::lua_state(), std::forward<Args>(args)), 0)...
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};
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return *this;
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}
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private:
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template<typename R, typename... Args, typename Fx, typename Key, typename = std::result_of_t<Fx(Args...)>>
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void set_fx(types<R(Args...)>, Key&& key, Fx&& fx) {
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set_resolved_function<R(Args...)>(std::forward<Key>(key), std::forward<Fx>(fx));
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}
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template<typename Fx, typename Key, meta::enable<meta::is_specialization_of<overload_set, meta::unqualified_t<Fx>>> = meta::enabler>
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void set_fx(types<>, Key&& key, Fx&& fx) {
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set(std::forward<Key>(key), std::forward<Fx>(fx));
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}
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template<typename Fx, typename Key, typename... Args, meta::disable<meta::is_specialization_of<overload_set, meta::unqualified_t<Fx>>> = meta::enabler>
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void set_fx(types<>, Key&& key, Fx&& fx, Args&&... args) {
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set(std::forward<Key>(key), as_function_reference(std::forward<Fx>(fx), std::forward<Args>(args)...));
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}
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template<typename... Sig, typename... Args, typename Key>
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void set_resolved_function(Key&& key, Args&&... args) {
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set(std::forward<Key>(key), as_function_reference<function_sig<Sig...>>(std::forward<Args>(args)...));
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}
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public:
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static inline table create(lua_State* L, int narr = 0, int nrec = 0) {
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lua_createtable(L, narr, nrec);
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table result(L);
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lua_pop(L, 1);
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return result;
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}
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template <typename Key, typename Value, typename... Args>
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static inline table create(lua_State* L, int narr, int nrec, Key&& key, Value&& value, Args&&... args) {
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lua_createtable(L, narr, nrec);
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table result(L);
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result.set(std::forward<Key>(key), std::forward<Value>(value), std::forward<Args>(args)...);
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lua_pop(L, 1);
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return result;
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}
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|
|
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template <typename... Args>
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static inline table create_with(lua_State* L, Args&&... args) {
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static_assert(sizeof...(Args) % 2 == 0, "You must have an even number of arguments for a key, value ... list.");
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static const int narr = static_cast<int>(meta::count_2_for_pack<std::is_integral, Args...>::value);
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return create(L, narr, static_cast<int>((sizeof...(Args) / 2) - narr), std::forward<Args>(args)...);
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|
}
|
|
|
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table create(int narr = 0, int nrec = 0) {
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|
return create(base_t::lua_state(), narr, nrec);
|
|
}
|
|
|
|
template <typename Key, typename Value, typename... Args>
|
|
table create(int narr, int nrec, Key&& key, Value&& value, Args&&... args) {
|
|
return create(base_t::lua_state(), narr, nrec, std::forward<Key>(key), std::forward<Value>(value), std::forward<Args>(args)...);
|
|
}
|
|
|
|
template <typename Name>
|
|
table create(Name&& name, int narr = 0, int nrec = 0) {
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|
table x = create(base_t::lua_state(), narr, nrec);
|
|
this->set(std::forward<Name>(name), x);
|
|
return x;
|
|
}
|
|
|
|
template <typename Name, typename Key, typename Value, typename... Args>
|
|
table create(Name&& name, int narr, int nrec, Key&& key, Value&& value, Args&&... args) {
|
|
table x = create(base_t::lua_state(), narr, nrec, std::forward<Key>(key), std::forward<Value>(value), std::forward<Args>(args)...);
|
|
this->set(std::forward<Name>(name), x);
|
|
return x;
|
|
}
|
|
|
|
template <typename... Args>
|
|
table create_with(Args&&... args) {
|
|
return create_with(base_t::lua_state(), std::forward<Args>(args)...);
|
|
}
|
|
|
|
template <typename Name, typename... Args>
|
|
table create_named(Name&& name, Args&&... args) {
|
|
static const int narr = static_cast<int>(meta::count_2_for_pack<std::is_integral, Args...>::value);
|
|
return create(std::forward<Name>(name), narr, sizeof...(Args) / 2 - narr, std::forward<Args>(args)...);
|
|
}
|
|
|
|
~basic_table_core() {
|
|
|
|
}
|
|
};
|
|
} // sol
|
|
|
|
#endif // SOL_TABLE_CORE_HPP
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