mirror of
https://github.com/ThePhD/sol2.git
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2de6447e73
* Compile fix for std::variant detection on Apple clang 9.1.0 (Xcode 9.3) * Update single * Consistently check SOL_CXX17_FEATURES, SOL_STD_VARIANT * Update single
888 lines
26 KiB
C++
888 lines
26 KiB
C++
// sol2
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// The MIT License (MIT)
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// Copyright (c) 2013-2018 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_STACK_GET_HPP
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#define SOL_STACK_GET_HPP
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#include "stack_core.hpp"
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#include "usertype_traits.hpp"
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#include "inheritance.hpp"
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#include "overload.hpp"
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#include "error.hpp"
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#include "unicode.hpp"
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#include <memory>
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#include <functional>
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#include <utility>
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#include <cstdlib>
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#include <cmath>
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#ifdef SOL_CXX17_FEATURES
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#include <string_view>
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#ifdef SOL_STD_VARIANT
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#include <variant>
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#endif // Apple clang screwed up
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#endif // C++17
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namespace sol {
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namespace stack {
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template <typename U>
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struct userdata_getter<U> {
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typedef stack_detail::strip_extensible_t<U> T;
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static std::pair<bool, T*> get(lua_State*, int, void*, record&) {
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return { false, nullptr };
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}
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};
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template <typename T, typename>
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struct getter {
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static T& get(lua_State* L, int index, record& tracking) {
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return getter<detail::as_value_tag<T>>{}.get(L, index, tracking);
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}
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};
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template <typename T>
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struct getter<T, std::enable_if_t<std::is_floating_point<T>::value>> {
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static T get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return static_cast<T>(lua_tonumber(L, index));
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}
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};
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template <typename T>
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struct getter<T, std::enable_if_t<std::is_integral<T>::value>> {
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static T get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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#if SOL_LUA_VERSION >= 503
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if (lua_isinteger(L, index) != 0) {
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return static_cast<T>(lua_tointeger(L, index));
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}
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#endif
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return static_cast<T>(llround(lua_tonumber(L, index)));
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}
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};
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template <typename T>
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struct getter<T, std::enable_if_t<std::is_enum<T>::value>> {
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static T get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return static_cast<T>(lua_tointegerx(L, index, nullptr));
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}
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};
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template <typename T>
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struct getter<as_table_t<T>> {
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typedef meta::unqualified_t<T> Tu;
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template <typename V>
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static void push_back_at_end(std::true_type, types<V>, lua_State* L, T& arr, std::size_t) {
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arr.push_back(stack::get<V>(L, -lua_size<V>::value));
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}
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template <typename V>
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static void push_back_at_end(std::false_type, types<V> t, lua_State* L, T& arr, std::size_t idx) {
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insert_at_end(meta::has_insert<Tu>(), t, L, arr, idx);
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}
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template <typename V>
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static void insert_at_end(std::true_type, types<V>, lua_State* L, T& arr, std::size_t) {
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using std::end;
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arr.insert(end(arr), stack::get<V>(L, -lua_size<V>::value));
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}
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template <typename V>
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static void insert_at_end(std::false_type, types<V>, lua_State* L, T& arr, std::size_t idx) {
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arr[idx] = stack::get<V>(L, -lua_size<V>::value);
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}
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static T get(lua_State* L, int relindex, record& tracking) {
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return get(meta::has_key_value_pair<meta::unqualified_t<T>>(), L, relindex, tracking);
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}
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static T get(std::false_type, lua_State* L, int relindex, record& tracking) {
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typedef typename T::value_type V;
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return get(types<V>(), L, relindex, tracking);
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}
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template <typename V>
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static T get(types<V> t, lua_State* L, int relindex, record& tracking) {
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tracking.use(1);
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int index = lua_absindex(L, relindex);
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T arr;
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std::size_t idx = 0;
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#if SOL_LUA_VERSION >= 503
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// This method is HIGHLY performant over regular table iteration thanks to the Lua API changes in 5.3
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for (lua_Integer i = 0;; i += lua_size<V>::value, lua_pop(L, lua_size<V>::value)) {
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if (idx >= arr.max_size()) {
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return arr;
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}
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bool isnil = false;
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for (int vi = 0; vi < lua_size<V>::value; ++vi) {
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type vt = static_cast<type>(lua_geti(L, index, i + vi));
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isnil = vt == type::lua_nil;
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if (isnil) {
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if (i == 0) {
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break;
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}
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lua_pop(L, (vi + 1));
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return arr;
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}
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}
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if (isnil)
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continue;
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push_back_at_end(meta::has_push_back<Tu>(), t, L, arr, idx);
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++idx;
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}
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#else
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// Zzzz slower but necessary thanks to the lower version API and missing functions qq
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for (lua_Integer i = 0;; i += lua_size<V>::value, lua_pop(L, lua_size<V>::value)) {
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if (idx >= arr.max_size()) {
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return arr;
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}
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bool isnil = false;
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for (int vi = 0; vi < lua_size<V>::value; ++vi) {
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lua_pushinteger(L, i);
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lua_gettable(L, index);
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type vt = type_of(L, -1);
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isnil = vt == type::lua_nil;
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if (isnil) {
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if (i == 0) {
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break;
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}
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lua_pop(L, (vi + 1));
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return arr;
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}
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}
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if (isnil)
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continue;
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push_back_at_end(meta::has_push_back<Tu>(), t, L, arr, idx);
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++idx;
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}
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#endif
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return arr;
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}
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static T get(std::true_type, lua_State* L, int index, record& tracking) {
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typedef typename T::value_type P;
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typedef typename P::first_type K;
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typedef typename P::second_type V;
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return get(types<K, V>(), L, index, tracking);
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}
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template <typename K, typename V>
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static T get(types<K, V>, lua_State* L, int relindex, record& tracking) {
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tracking.use(1);
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T associative;
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int index = lua_absindex(L, relindex);
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lua_pushnil(L);
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while (lua_next(L, index) != 0) {
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decltype(auto) key = stack::check_get<K>(L, -2);
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if (!key) {
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lua_pop(L, 1);
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continue;
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}
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associative.emplace(std::forward<decltype(*key)>(*key), stack::get<V>(L, -1));
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lua_pop(L, 1);
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}
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return associative;
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}
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};
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template <typename T, typename Al>
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struct getter<as_table_t<std::forward_list<T, Al>>> {
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typedef std::forward_list<T, Al> C;
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static C get(lua_State* L, int relindex, record& tracking) {
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return get(meta::has_key_value_pair<C>(), L, relindex, tracking);
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}
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static C get(std::true_type, lua_State* L, int index, record& tracking) {
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typedef typename T::value_type P;
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typedef typename P::first_type K;
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typedef typename P::second_type V;
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return get(types<K, V>(), L, index, tracking);
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}
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static C get(std::false_type, lua_State* L, int relindex, record& tracking) {
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typedef typename C::value_type V;
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return get(types<V>(), L, relindex, tracking);
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}
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template <typename V>
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static C get(types<V>, lua_State* L, int relindex, record& tracking) {
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tracking.use(1);
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int index = lua_absindex(L, relindex);
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C arr;
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auto at = arr.cbefore_begin();
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std::size_t idx = 0;
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#if SOL_LUA_VERSION >= 503
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// This method is HIGHLY performant over regular table iteration thanks to the Lua API changes in 5.3
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for (lua_Integer i = 0;; i += lua_size<V>::value, lua_pop(L, lua_size<V>::value)) {
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if (idx >= arr.max_size()) {
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return arr;
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}
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bool isnil = false;
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for (int vi = 0; vi < lua_size<V>::value; ++vi) {
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type t = static_cast<type>(lua_geti(L, index, i + vi));
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isnil = t == type::lua_nil;
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if (isnil) {
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if (i == 0) {
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break;
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}
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lua_pop(L, (vi + 1));
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return arr;
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}
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}
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if (isnil)
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continue;
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at = arr.insert_after(at, stack::get<V>(L, -lua_size<V>::value));
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++idx;
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}
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#else
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// Zzzz slower but necessary thanks to the lower version API and missing functions qq
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for (lua_Integer i = 0;; i += lua_size<V>::value, lua_pop(L, lua_size<V>::value)) {
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if (idx >= arr.max_size()) {
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return arr;
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}
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bool isnil = false;
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for (int vi = 0; vi < lua_size<V>::value; ++vi) {
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lua_pushinteger(L, i);
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lua_gettable(L, index);
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type t = type_of(L, -1);
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isnil = t == type::lua_nil;
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if (isnil) {
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if (i == 0) {
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break;
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}
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lua_pop(L, (vi + 1));
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return arr;
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}
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}
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if (isnil)
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continue;
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at = arr.insert_after(at, stack::get<V>(L, -lua_size<V>::value));
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++idx;
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}
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#endif
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return arr;
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}
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template <typename K, typename V>
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static C get(types<K, V>, lua_State* L, int relindex, record& tracking) {
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tracking.use(1);
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C associative;
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auto at = associative.cbefore_begin();
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int index = lua_absindex(L, relindex);
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lua_pushnil(L);
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while (lua_next(L, index) != 0) {
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decltype(auto) key = stack::check_get<K>(L, -2);
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if (!key) {
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lua_pop(L, 1);
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continue;
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}
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at = associative.emplace_after(at, std::forward<decltype(*key)>(*key), stack::get<V>(L, -1));
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lua_pop(L, 1);
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}
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return associative;
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}
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};
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template <typename T>
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struct getter<nested<T>, std::enable_if_t<!is_container<T>::value>> {
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static T get(lua_State* L, int index, record& tracking) {
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getter<T> g;
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// VC++ has a bad warning here: shut it up
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(void)g;
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return g.get(L, index, tracking);
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}
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};
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template <typename T>
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struct getter<nested<T>, std::enable_if_t<meta::all<is_container<T>, meta::neg<meta::has_key_value_pair<meta::unqualified_t<T>>>>::value>> {
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static T get(lua_State* L, int index, record& tracking) {
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typedef typename T::value_type V;
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getter<as_table_t<T>> g;
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// VC++ has a bad warning here: shut it up
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(void)g;
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return g.get(types<nested<V>>(), L, index, tracking);
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}
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};
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template <typename T>
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struct getter<nested<T>, std::enable_if_t<meta::all<is_container<T>, meta::has_key_value_pair<meta::unqualified_t<T>>>::value>> {
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static T get(lua_State* L, int index, record& tracking) {
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typedef typename T::value_type P;
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typedef typename P::first_type K;
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typedef typename P::second_type V;
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getter<as_table_t<T>> g;
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// VC++ has a bad warning here: shut it up
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(void)g;
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return g.get(types<K, nested<V>>(), L, index, tracking);
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}
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};
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template <typename T>
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struct getter<T, std::enable_if_t<is_lua_reference<T>::value>> {
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static T get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return T(L, index);
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}
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};
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template <>
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struct getter<userdata_value> {
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static userdata_value get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return userdata_value(lua_touserdata(L, index));
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}
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};
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template <>
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struct getter<lightuserdata_value> {
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static lightuserdata_value get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return lightuserdata_value(lua_touserdata(L, index));
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}
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};
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template <typename T>
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struct getter<light<T>> {
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static light<T> get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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void* memory = lua_touserdata(L, index);
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return light<T>(static_cast<T*>(memory));
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}
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};
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template <typename T>
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struct getter<user<T>> {
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static std::add_lvalue_reference_t<T> get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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void* memory = lua_touserdata(L, index);
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memory = detail::align_user<T>(memory);
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return *static_cast<std::remove_reference_t<T>*>(memory);
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}
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};
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template <typename T>
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struct getter<user<T*>> {
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static T* get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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void* memory = lua_touserdata(L, index);
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memory = detail::align_user<T*>(memory);
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return static_cast<T*>(memory);
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}
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};
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template <>
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struct getter<type> {
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static type get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return static_cast<type>(lua_type(L, index));
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}
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};
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template <>
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struct getter<bool> {
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static bool get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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return lua_toboolean(L, index) != 0;
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}
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};
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template <>
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struct getter<std::string> {
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static std::string get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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std::size_t len;
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auto str = lua_tolstring(L, index, &len);
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return std::string(str, len);
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}
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};
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template <>
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struct getter<const char*> {
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static const char* get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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size_t sz;
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return lua_tolstring(L, index, &sz);
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}
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};
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template <>
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struct getter<char> {
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static char get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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size_t len;
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auto str = lua_tolstring(L, index, &len);
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return len > 0 ? str[0] : '\0';
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}
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};
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template <typename Traits>
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struct getter<basic_string_view<char, Traits>> {
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static string_view get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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size_t sz;
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const char* str = lua_tolstring(L, index, &sz);
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return basic_string_view<char, Traits>(str, sz);
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}
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};
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template <typename Traits, typename Al>
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struct getter<std::basic_string<wchar_t, Traits, Al>> {
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typedef std::basic_string<wchar_t, Traits, Al> S;
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static S get(lua_State* L, int index, record& tracking) {
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typedef std::conditional_t<sizeof(wchar_t) == 2, char16_t, char32_t> Ch;
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typedef typename std::allocator_traits<Al>::template rebind_alloc<Ch> ChAl;
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typedef std::char_traits<Ch> ChTraits;
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getter<std::basic_string<Ch, ChTraits, ChAl>> g;
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(void)g;
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return g.template get_into<S>(L, index, tracking);
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}
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};
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template <typename Traits, typename Al>
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struct getter<std::basic_string<char16_t, Traits, Al>> {
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template <typename F>
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static void convert(const char* strb, const char* stre, F&& f) {
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char32_t cp = 0;
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for (const char* strtarget = strb; strtarget < stre;) {
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auto dr = unicode::utf8_to_code_point(strtarget, stre);
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if (dr.error != unicode::error_code::ok) {
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cp = unicode::unicode_detail::replacement;
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++strtarget;
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}
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else {
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cp = dr.codepoint;
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strtarget = dr.next;
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}
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auto er = unicode::code_point_to_utf16(cp);
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f(er);
|
|
}
|
|
}
|
|
|
|
template <typename S>
|
|
static S get_into(lua_State* L, int index, record& tracking) {
|
|
typedef typename S::value_type Ch;
|
|
tracking.use(1);
|
|
size_t len;
|
|
auto utf8p = lua_tolstring(L, index, &len);
|
|
if (len < 1)
|
|
return S();
|
|
std::size_t needed_size = 0;
|
|
const char* strb = utf8p;
|
|
const char* stre = utf8p + len;
|
|
auto count_units = [&needed_size](const unicode::encoded_result<char16_t> er) {
|
|
needed_size += er.code_units_size;
|
|
};
|
|
convert(strb, stre, count_units);
|
|
S r(needed_size, static_cast<Ch>(0));
|
|
r.resize(needed_size);
|
|
Ch* target = &r[0];
|
|
auto copy_units = [&target](const unicode::encoded_result<char16_t> er) {
|
|
std::memcpy(target, er.code_units.data(), er.code_units_size * sizeof(Ch));
|
|
target += er.code_units_size;
|
|
};
|
|
convert(strb, stre, copy_units);
|
|
return r;
|
|
}
|
|
|
|
static std::basic_string<char16_t, Traits, Al> get(lua_State* L, int index, record& tracking) {
|
|
return get_into<std::basic_string<char16_t, Traits, Al>>(L, index, tracking);
|
|
}
|
|
};
|
|
|
|
template <typename Traits, typename Al>
|
|
struct getter<std::basic_string<char32_t, Traits, Al>> {
|
|
template <typename F>
|
|
static void convert(const char* strb, const char* stre, F&& f) {
|
|
char32_t cp = 0;
|
|
for (const char* strtarget = strb; strtarget < stre;) {
|
|
auto dr = unicode::utf8_to_code_point(strtarget, stre);
|
|
if (dr.error != unicode::error_code::ok) {
|
|
cp = unicode::unicode_detail::replacement;
|
|
++strtarget;
|
|
}
|
|
else {
|
|
cp = dr.codepoint;
|
|
strtarget = dr.next;
|
|
}
|
|
auto er = unicode::code_point_to_utf32(cp);
|
|
f(er);
|
|
}
|
|
}
|
|
|
|
template <typename S>
|
|
static S get_into(lua_State* L, int index, record& tracking) {
|
|
typedef typename S::value_type Ch;
|
|
tracking.use(1);
|
|
size_t len;
|
|
auto utf8p = lua_tolstring(L, index, &len);
|
|
if (len < 1)
|
|
return S();
|
|
std::size_t needed_size = 0;
|
|
const char* strb = utf8p;
|
|
const char* stre = utf8p + len;
|
|
auto count_units = [&needed_size](const unicode::encoded_result<char32_t> er) {
|
|
needed_size += er.code_units_size;
|
|
};
|
|
convert(strb, stre, count_units);
|
|
S r(needed_size, static_cast<Ch>(0));
|
|
r.resize(needed_size);
|
|
Ch* target = &r[0];
|
|
auto copy_units = [&target](const unicode::encoded_result<char32_t> er) {
|
|
std::memcpy(target, er.code_units.data(), er.code_units_size * sizeof(Ch));
|
|
target += er.code_units_size;
|
|
};
|
|
convert(strb, stre, copy_units);
|
|
return r;
|
|
}
|
|
|
|
static std::basic_string<char32_t, Traits, Al> get(lua_State* L, int index, record& tracking) {
|
|
return get_into<std::basic_string<char32_t, Traits, Al>>(L, index, tracking);
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct getter<char16_t> {
|
|
static char16_t get(lua_State* L, int index, record& tracking) {
|
|
string_view utf8 = stack::get<string_view>(L, index, tracking);
|
|
const char* strb = utf8.data();
|
|
const char* stre = utf8.data() + utf8.size();
|
|
char32_t cp = 0;
|
|
auto dr = unicode::utf8_to_code_point(strb, stre);
|
|
if (dr.error != unicode::error_code::ok) {
|
|
cp = unicode::unicode_detail::replacement;
|
|
}
|
|
else {
|
|
cp = dr.codepoint;
|
|
}
|
|
auto er = unicode::code_point_to_utf16(cp);
|
|
return er.code_units[0];
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct getter<char32_t> {
|
|
static char32_t get(lua_State* L, int index, record& tracking) {
|
|
string_view utf8 = stack::get<string_view>(L, index, tracking);
|
|
const char* strb = utf8.data();
|
|
const char* stre = utf8.data() + utf8.size();
|
|
char32_t cp = 0;
|
|
auto dr = unicode::utf8_to_code_point(strb, stre);
|
|
if (dr.error != unicode::error_code::ok) {
|
|
cp = unicode::unicode_detail::replacement;
|
|
}
|
|
else {
|
|
cp = dr.codepoint;
|
|
}
|
|
auto er = unicode::code_point_to_utf32(cp);
|
|
return er.code_units[0];
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct getter<wchar_t> {
|
|
static wchar_t get(lua_State* L, int index, record& tracking) {
|
|
typedef std::conditional_t<sizeof(wchar_t) == 2, char16_t, char32_t> Ch;
|
|
getter<Ch> g;
|
|
(void)g;
|
|
auto c = g.get(L, index, tracking);
|
|
return static_cast<wchar_t>(c);
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct getter<meta_function> {
|
|
static meta_function get(lua_State* L, int index, record& tracking) {
|
|
tracking.use(1);
|
|
const char* name = getter<const char*>{}.get(L, index, tracking);
|
|
const auto& mfnames = meta_function_names();
|
|
for (std::size_t i = 0; i < mfnames.size(); ++i)
|
|
if (mfnames[i] == name)
|
|
return static_cast<meta_function>(i);
|
|
return meta_function::construct;
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct getter<lua_nil_t> {
|
|
static lua_nil_t get(lua_State*, int, record& tracking) {
|
|
tracking.use(1);
|
|
return lua_nil;
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct getter<std::nullptr_t> {
|
|
static std::nullptr_t get(lua_State*, int, record& tracking) {
|
|
tracking.use(1);
|
|
return nullptr;
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct getter<nullopt_t> {
|
|
static nullopt_t get(lua_State*, int, record& tracking) {
|
|
tracking.use(1);
|
|
return nullopt;
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct getter<this_state> {
|
|
static this_state get(lua_State* L, int, record& tracking) {
|
|
tracking.use(0);
|
|
return this_state(L);
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct getter<this_main_state> {
|
|
static this_main_state get(lua_State* L, int, record& tracking) {
|
|
tracking.use(0);
|
|
return this_main_state(main_thread(L, L));
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct getter<lua_CFunction> {
|
|
static lua_CFunction get(lua_State* L, int index, record& tracking) {
|
|
tracking.use(1);
|
|
return lua_tocfunction(L, index);
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct getter<c_closure> {
|
|
static c_closure get(lua_State* L, int index, record& tracking) {
|
|
tracking.use(1);
|
|
return c_closure(lua_tocfunction(L, index), -1);
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct getter<error> {
|
|
static error get(lua_State* L, int index, record& tracking) {
|
|
tracking.use(1);
|
|
size_t sz = 0;
|
|
const char* err = lua_tolstring(L, index, &sz);
|
|
if (err == nullptr) {
|
|
return error(detail::direct_error, "");
|
|
}
|
|
return error(detail::direct_error, std::string(err, sz));
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct getter<void*> {
|
|
static void* get(lua_State* L, int index, record& tracking) {
|
|
tracking.use(1);
|
|
return lua_touserdata(L, index);
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct getter<detail::as_value_tag<T>> {
|
|
static T* get_no_lua_nil(lua_State* L, int index, record& tracking) {
|
|
void* memory = lua_touserdata(L, index);
|
|
#ifdef SOL_ENABLE_INTEROP
|
|
userdata_getter<extensible<T>> ug;
|
|
(void)ug;
|
|
auto ugr = ug.get(L, index, memory, tracking);
|
|
if (ugr.first) {
|
|
return ugr.second;
|
|
}
|
|
#endif // interop extensibility
|
|
tracking.use(1);
|
|
void* rawdata = detail::align_usertype_pointer(memory);
|
|
void** pudata = static_cast<void**>(rawdata);
|
|
void* udata = *pudata;
|
|
return get_no_lua_nil_from(L, udata, index, tracking);
|
|
}
|
|
|
|
static T* get_no_lua_nil_from(lua_State* L, void* udata, int index, record&) {
|
|
if (detail::has_derived<T>::value && luaL_getmetafield(L, index, &detail::base_class_cast_key()[0]) != 0) {
|
|
void* basecastdata = lua_touserdata(L, -1);
|
|
detail::inheritance_cast_function ic = reinterpret_cast<detail::inheritance_cast_function>(basecastdata);
|
|
// use the casting function to properly adjust the pointer for the desired T
|
|
udata = ic(udata, usertype_traits<T>::qualified_name());
|
|
lua_pop(L, 1);
|
|
}
|
|
T* obj = static_cast<T*>(udata);
|
|
return obj;
|
|
}
|
|
|
|
static T& get(lua_State* L, int index, record& tracking) {
|
|
return *get_no_lua_nil(L, index, tracking);
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct getter<detail::as_pointer_tag<T>> {
|
|
static T* get(lua_State* L, int index, record& tracking) {
|
|
type t = type_of(L, index);
|
|
if (t == type::lua_nil) {
|
|
tracking.use(1);
|
|
return nullptr;
|
|
}
|
|
getter<detail::as_value_tag<T>> g;
|
|
// Avoid VC++ warning
|
|
(void)g;
|
|
return g.get_no_lua_nil(L, index, tracking);
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct getter<non_null<T*>> {
|
|
static T* get(lua_State* L, int index, record& tracking) {
|
|
getter<detail::as_value_tag<T>> g;
|
|
// Avoid VC++ warning
|
|
(void)g;
|
|
return g.get_no_lua_nil(L, index, tracking);
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct getter<T&> {
|
|
static T& get(lua_State* L, int index, record& tracking) {
|
|
getter<detail::as_value_tag<T>> g;
|
|
// Avoid VC++ warning
|
|
(void)g;
|
|
return g.get(L, index, tracking);
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct getter<std::reference_wrapper<T>> {
|
|
static T& get(lua_State* L, int index, record& tracking) {
|
|
getter<T&> g;
|
|
// Avoid VC++ warning
|
|
(void)g;
|
|
return g.get(L, index, tracking);
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct getter<T*> {
|
|
static T* get(lua_State* L, int index, record& tracking) {
|
|
getter<detail::as_pointer_tag<T>> g;
|
|
// Avoid VC++ warning
|
|
(void)g;
|
|
return g.get(L, index, tracking);
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
struct getter<T, std::enable_if_t<is_unique_usertype<T>::value>> {
|
|
typedef typename unique_usertype_traits<T>::type P;
|
|
typedef typename unique_usertype_traits<T>::actual_type Real;
|
|
|
|
static Real& get(lua_State* L, int index, record& tracking) {
|
|
tracking.use(1);
|
|
void* memory = lua_touserdata(L, index);
|
|
memory = detail::align_usertype_unique<Real>(memory);
|
|
Real* mem = static_cast<Real*>(memory);
|
|
return *mem;
|
|
}
|
|
};
|
|
|
|
template <typename... Tn>
|
|
struct getter<std::tuple<Tn...>> {
|
|
typedef std::tuple<decltype(stack::get<Tn>(nullptr, 0))...> R;
|
|
|
|
template <typename... Args>
|
|
static R apply(std::index_sequence<>, lua_State*, int, record&, Args&&... args) {
|
|
// Fuck you too, VC++
|
|
return R{ std::forward<Args>(args)... };
|
|
}
|
|
|
|
template <std::size_t I, std::size_t... Ix, typename... Args>
|
|
static R apply(std::index_sequence<I, Ix...>, lua_State* L, int index, record& tracking, Args&&... args) {
|
|
// Fuck you too, VC++
|
|
typedef std::tuple_element_t<I, std::tuple<Tn...>> T;
|
|
return apply(std::index_sequence<Ix...>(), L, index, tracking, std::forward<Args>(args)..., stack::get<T>(L, index + tracking.used, tracking));
|
|
}
|
|
|
|
static R get(lua_State* L, int index, record& tracking) {
|
|
return apply(std::make_index_sequence<sizeof...(Tn)>(), L, index, tracking);
|
|
}
|
|
};
|
|
|
|
template <typename A, typename B>
|
|
struct getter<std::pair<A, B>> {
|
|
static decltype(auto) get(lua_State* L, int index, record& tracking) {
|
|
return std::pair<decltype(stack::get<A>(L, index)), decltype(stack::get<B>(L, index))>{ stack::get<A>(L, index, tracking), stack::get<B>(L, index + tracking.used, tracking) };
|
|
}
|
|
};
|
|
|
|
#ifdef SOL_CXX17_FEATURES
|
|
#ifdef SOL_STD_VARIANT
|
|
template <typename... Tn>
|
|
struct getter<std::variant<Tn...>> {
|
|
typedef std::variant<Tn...> V;
|
|
typedef std::variant_size<V> V_size;
|
|
typedef std::integral_constant<bool, V_size::value == 0> V_is_empty;
|
|
|
|
static V get_empty(std::true_type, lua_State*, int, record&) {
|
|
return V();
|
|
}
|
|
|
|
static V get_empty(std::false_type, lua_State* L, int index, record& tracking) {
|
|
typedef std::variant_alternative_t<0, V> T;
|
|
// This should never be reached...
|
|
// please check your code and understand what you did to bring yourself here
|
|
std::abort();
|
|
return V(std::in_place_index<0>, stack::get<T>(L, index, tracking));
|
|
}
|
|
|
|
static V get_one(std::integral_constant<std::size_t, 0>, lua_State* L, int index, record& tracking) {
|
|
return get_empty(V_is_empty(), L, index, tracking);
|
|
}
|
|
|
|
template <std::size_t I>
|
|
static V get_one(std::integral_constant<std::size_t, I>, lua_State* L, int index, record& tracking) {
|
|
typedef std::variant_alternative_t<I - 1, V> T;
|
|
if (stack::check<T>(L, index, no_panic, tracking)) {
|
|
return V(std::in_place_index<I - 1>, stack::get<T>(L, index));
|
|
}
|
|
return get_one(std::integral_constant<std::size_t, I - 1>(), L, index, tracking);
|
|
}
|
|
|
|
static V get(lua_State* L, int index, record& tracking) {
|
|
return get_one(std::integral_constant<std::size_t, V_size::value>(), L, index, tracking);
|
|
}
|
|
};
|
|
#endif // SOL_STD_VARIANT
|
|
#endif // SOL_CXX17_FEATURES
|
|
}
|
|
} // namespace sol::stack
|
|
|
|
#endif // SOL_STACK_GET_HPP
|