// sol2 // The MIT License (MIT) // Copyright (c) 2013-2021 Rapptz, ThePhD and contributors // Permission is hereby granted, free of charge, to any person obtaining a copy of // this software and associated documentation files (the "Software"), to deal in // the Software without restriction, including without limitation the rights to // use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of // the Software, and to permit persons to whom the Software is furnished to do so, // subject to the following conditions: // The above copyright notice and this permission notice shall be included in all // copies or substantial portions of the Software. // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS // FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR // COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER // IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. #ifndef SOL_STACK_FIELD_HPP #define SOL_STACK_FIELD_HPP #include <sol/stack_core.hpp> #include <sol/stack_push.hpp> #include <sol/stack_get.hpp> #include <sol/stack_check_get.hpp> namespace sol { namespace stack { namespace stack_detail { template <typename T, bool global, bool raw> inline constexpr bool is_get_direct_tableless_v = (global && !raw && meta::is_c_str_or_string_v<T>); template <typename T, bool global, bool raw> inline constexpr bool is_get_direct_v = (is_get_direct_tableless_v<T, global, raw>) // cf-hack || (!global && !raw && (meta::is_c_str_or_string_v<T> || meta::is_string_of_v<T, char>)) // cf-hack || (!global && raw && (std::is_integral_v<T> && !std::is_same_v<T, bool>)) #if SOL_LUA_VERSION_I_ >= 503 || (!global && !raw && (std::is_integral_v<T> && !std::is_same_v<T, bool>)) #endif // integer keys 5.3 or better #if SOL_LUA_VERSION_I_ >= 502 || (!global && raw && std::is_pointer_v<T> && std::is_void_v<std::remove_pointer_t<T>>) #endif // void pointer keys 5.2 or better ; template <typename T, bool global, bool raw> inline constexpr bool is_set_direct_tableless_v = (global && !raw && meta::is_c_str_or_string_v<T>); template <typename T, bool global, bool raw> inline constexpr bool is_set_direct_v = (is_set_direct_tableless_v<T, global, raw>) // cf-hack || (!global && !raw && (meta::is_c_str_or_string_v<T> || meta::is_string_of_v<T, char>)) // cf-hack || (!global && raw && (std::is_integral_v<T> && !std::is_same_v<T, bool>)) // cf-hack #if SOL_LUA_VERSION_I_ >= 503 || (!global && !raw && (std::is_integral_v<T> && !std::is_same_v<T, bool>)) #endif // integer keys 5.3 or better #if SOL_LUA_VERSION_I_ >= 502 || (!global && raw && (std::is_pointer_v<T> && std::is_void_v<std::remove_pointer_t<T>>)) #endif // void pointer keys 5.2 or better ; } // namespace stack_detail template <typename T, bool global, bool raw, typename> struct field_getter { static inline constexpr int default_table_index = meta::conditional_t<stack_detail::is_get_direct_v<T, global, raw>, std::integral_constant<int, -1>, std::integral_constant<int, -2>>::value; template <typename Key> void get(lua_State* L, Key&& key, int tableindex = default_table_index) { if constexpr (std::is_same_v<T, update_if_empty_t> || std::is_same_v<T, override_value_t> || std::is_same_v<T, create_if_nil_t>) { (void)L; (void)key; (void)tableindex; } else if constexpr (std::is_same_v<T, env_key_t>) { (void)key; #if SOL_LUA_VERSION_I_ < 502 // Use lua_setfenv lua_getfenv(L, tableindex); #else // Use upvalues as explained in Lua 5.2 and beyond's manual if (lua_getupvalue(L, tableindex, 1) == nullptr) { push(L, lua_nil); } #endif } else if constexpr (std::is_same_v<T, metatable_key_t>) { (void)key; if (lua_getmetatable(L, tableindex) == 0) push(L, lua_nil); } else if constexpr (raw) { if constexpr (std::is_integral_v<T> && !std::is_same_v<bool, T>) { lua_rawgeti(L, tableindex, static_cast<lua_Integer>(key)); } #if SOL_LUA_VERSION_I_ >= 502 else if constexpr (std::is_pointer_v<T> && std::is_void_v<std::remove_pointer_t<T>>) { lua_rawgetp(L, tableindex, key); } #endif // Lua 5.2.x+ else { push(L, std::forward<Key>(key)); lua_rawget(L, tableindex); } } else { if constexpr (meta::is_c_str_or_string_v<T>) { if constexpr (global) { (void)tableindex; lua_getglobal(L, &key[0]); } else { lua_getfield(L, tableindex, &key[0]); } } else if constexpr (std::is_same_v<T, meta_function>) { const auto& real_key = to_string(key); lua_getfield(L, tableindex, &real_key[0]); } #if SOL_LUA_VERSION_I_ >= 503 else if constexpr (std::is_integral_v<T> && !std::is_same_v<bool, T>) { lua_geti(L, tableindex, static_cast<lua_Integer>(key)); } #endif // Lua 5.3.x+ else { push(L, std::forward<Key>(key)); lua_gettable(L, tableindex); } } } }; template <typename... Args, bool b, bool raw, typename C> struct field_getter<std::tuple<Args...>, b, raw, C> { template <std::size_t... I, typename Keys> void apply(std::index_sequence<0, I...>, lua_State* L, Keys&& keys, int tableindex) { get_field<b, raw>(L, std::get<0>(std::forward<Keys>(keys)), tableindex); void(detail::swallow { (get_field<false, raw>(L, std::get<I>(std::forward<Keys>(keys))), 0)... }); reference saved(L, -1); lua_pop(L, static_cast<int>(sizeof...(I))); saved.push(); } template <typename Keys> void get(lua_State* L, Keys&& keys) { apply(std::make_index_sequence<sizeof...(Args)>(), L, std::forward<Keys>(keys), lua_absindex(L, -1)); } template <typename Keys> void get(lua_State* L, Keys&& keys, int tableindex) { apply(std::make_index_sequence<sizeof...(Args)>(), L, std::forward<Keys>(keys), tableindex); } }; template <typename A, typename B, bool b, bool raw, typename C> struct field_getter<std::pair<A, B>, b, raw, C> { template <typename Keys> void get(lua_State* L, Keys&& keys, int tableindex) { get_field<b, raw>(L, std::get<0>(std::forward<Keys>(keys)), tableindex); get_field<false, raw>(L, std::get<1>(std::forward<Keys>(keys))); reference saved(L, -1); lua_pop(L, static_cast<int>(2)); saved.push(); } template <typename Keys> void get(lua_State* L, Keys&& keys) { get_field<b, raw>(L, std::get<0>(std::forward<Keys>(keys))); get_field<false, raw>(L, std::get<1>(std::forward<Keys>(keys))); reference saved(L, -1); lua_pop(L, static_cast<int>(2)); saved.push(); } }; template <typename T, bool global, bool raw, typename> struct field_setter { static constexpr int default_table_index = meta::conditional_t<stack_detail::is_set_direct_v<T, global, raw>, std::integral_constant<int, -2>, std::integral_constant<int, -3>>::value; template <typename Key, typename Value> void set(lua_State* L, Key&& key, Value&& value, int tableindex = default_table_index) { if constexpr (std::is_same_v<T, update_if_empty_t> || std::is_same_v<T, override_value_t>) { (void)L; (void)key; (void)value; (void)tableindex; } else if constexpr (std::is_same_v<T, metatable_key_t>) { (void)key; push(L, std::forward<Value>(value)); lua_setmetatable(L, tableindex); } else if constexpr (raw) { if constexpr (std::is_integral_v<T> && !std::is_same_v<bool, T>) { push(L, std::forward<Value>(value)); lua_rawseti(L, tableindex, static_cast<lua_Integer>(key)); } #if SOL_LUA_VERSION_I_ >= 502 else if constexpr (std::is_pointer_v<T> && std::is_void_v<std::remove_pointer_t<T>>) { push(L, std::forward<Value>(value)); lua_rawsetp(L, tableindex, std::forward<Key>(key)); } #endif // Lua 5.2.x else { push(L, std::forward<Key>(key)); push(L, std::forward<Value>(value)); lua_rawset(L, tableindex); } } else { if constexpr (meta::is_c_str_or_string_v<T>) { if constexpr (global) { push(L, std::forward<Value>(value)); lua_setglobal(L, &key[0]); (void)tableindex; } else { push(L, std::forward<Value>(value)); lua_setfield(L, tableindex, &key[0]); } } #if SOL_LUA_VERSION_I_ >= 503 else if constexpr (std::is_integral_v<T> && !std::is_same_v<bool, T>) { push(L, std::forward<Value>(value)); lua_seti(L, tableindex, static_cast<lua_Integer>(key)); } #endif // Lua 5.3.x else { push(L, std::forward<Key>(key)); push(L, std::forward<Value>(value)); lua_settable(L, tableindex); } } } }; template <typename... Args, bool b, bool raw, typename C> struct field_setter<std::tuple<Args...>, b, raw, C> { template <bool g, std::size_t I, typename Keys, typename Value> void apply(std::index_sequence<I>, lua_State* L, Keys&& keys, Value&& value, int tableindex) { I < 1 ? set_field<g, raw>(L, std::get<I>(std::forward<Keys>(keys)), std::forward<Value>(value), tableindex) : set_field<g, raw>(L, std::get<I>(std::forward<Keys>(keys)), std::forward<Value>(value)); } template <bool g, std::size_t I0, std::size_t I1, std::size_t... I, typename Keys, typename Value> void apply(std::index_sequence<I0, I1, I...>, lua_State* L, Keys&& keys, Value&& value, int tableindex) { I0 < 1 ? get_field<g, raw>(L, std::get<I0>(std::forward<Keys>(keys)), tableindex) : get_field<g, raw>(L, std::get<I0>(std::forward<Keys>(keys)), -1); apply<false>(std::index_sequence<I1, I...>(), L, std::forward<Keys>(keys), std::forward<Value>(value), -1); } template <bool g, std::size_t I0, std::size_t... I, typename Keys, typename Value> void top_apply(std::index_sequence<I0, I...>, lua_State* L, Keys&& keys, Value&& value, int tableindex) { apply<g>(std::index_sequence<I0, I...>(), L, std::forward<Keys>(keys), std::forward<Value>(value), tableindex); lua_pop(L, static_cast<int>(sizeof...(I))); } template <typename Keys, typename Value> void set(lua_State* L, Keys&& keys, Value&& value, int tableindex = -3) { top_apply<b>(std::make_index_sequence<sizeof...(Args)>(), L, std::forward<Keys>(keys), std::forward<Value>(value), tableindex); } }; template <typename A, typename B, bool b, bool raw, typename C> struct field_setter<std::pair<A, B>, b, raw, C> { template <typename Keys, typename Value> void set(lua_State* L, Keys&& keys, Value&& value, int tableindex = -1) { get_field<b, raw>(L, std::get<0>(std::forward<Keys>(keys)), tableindex); set_field<false, raw>(L, std::get<1>(std::forward<Keys>(keys)), std::forward<Value>(value), lua_gettop(L)); lua_pop(L, 1); } }; }} // namespace sol::stack #endif // SOL_STACK_FIELD_HPP