mirror of
https://github.com/ThePhD/sol2.git
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266 lines
8.1 KiB
C++
266 lines
8.1 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_PROXY_HPP
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#define SOL_PROXY_HPP
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#include "traits.hpp"
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#include "function.hpp"
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#include "protected_function.hpp"
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#include "proxy_base.hpp"
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namespace sol {
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template <typename Table, typename Key>
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struct proxy : public proxy_base<proxy<Table, Key>> {
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private:
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typedef meta::condition<meta::is_specialization_of<Key, std::tuple>, Key, std::tuple<meta::condition<std::is_array<meta::unqualified_t<Key>>, Key&, meta::unqualified_t<Key>>>> key_type;
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template <typename T, std::size_t... I>
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decltype(auto) tuple_get(std::index_sequence<I...>) const {
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return tbl.template traverse_get<T>(std::get<I>(key)...);
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}
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template <std::size_t... I, typename T>
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void tuple_set(std::index_sequence<I...>, T&& value) {
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tbl.traverse_set(std::get<I>(key)..., std::forward<T>(value));
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}
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auto setup_table(std::true_type) {
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auto p = stack::probe_get_field<std::is_same<meta::unqualified_t<Table>, global_table>::value>(lua_state(), key, tbl.stack_index());
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lua_pop(lua_state(), p.levels);
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return p;
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}
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bool is_valid(std::false_type) {
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auto pp = stack::push_pop(tbl);
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auto p = stack::probe_get_field<std::is_same<meta::unqualified_t<Table>, global_table>::value>(lua_state(), key, lua_gettop(lua_state()));
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lua_pop(lua_state(), p.levels);
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return p;
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}
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public:
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Table tbl;
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key_type key;
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template <typename T>
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proxy(Table table, T&& k)
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: tbl(table), key(std::forward<T>(k)) {
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}
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template <typename T>
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proxy& set(T&& item) {
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tuple_set(std::make_index_sequence<std::tuple_size<meta::unqualified_t<key_type>>::value>(), std::forward<T>(item));
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return *this;
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}
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template <typename... Args>
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proxy& set_function(Args&&... args) {
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tbl.set_function(key, std::forward<Args>(args)...);
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return *this;
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}
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template <typename U, meta::enable<meta::neg<is_lua_reference_or_proxy<meta::unwrap_unqualified_t<U>>>, meta::is_callable<meta::unwrap_unqualified_t<U>>> = meta::enabler>
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proxy& operator=(U&& other) {
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return set_function(std::forward<U>(other));
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}
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template <typename U, meta::disable<meta::neg<is_lua_reference_or_proxy<meta::unwrap_unqualified_t<U>>>, meta::is_callable<meta::unwrap_unqualified_t<U>>> = meta::enabler>
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proxy& operator=(U&& other) {
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return set(std::forward<U>(other));
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}
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template <typename T>
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proxy& operator=(std::initializer_list<T> other) {
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return set(std::move(other));
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}
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template <typename T>
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decltype(auto) get() const {
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return tuple_get<T>(std::make_index_sequence<std::tuple_size<meta::unqualified_t<key_type>>::value>());
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}
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template <typename T>
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decltype(auto) get_or(T&& otherwise) const {
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typedef decltype(get<T>()) U;
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optional<U> option = get<optional<U>>();
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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 D>
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decltype(auto) get_or(D&& otherwise) const {
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optional<T> option = get<optional<T>>();
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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>
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decltype(auto) get_or_create() {
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return get_or_create<T>(new_table());
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}
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template <typename T, typename Otherwise>
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decltype(auto) get_or_create(Otherwise&& other) {
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if (!this->valid()) {
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this->set(std::forward<Otherwise>(other));
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}
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return get<T>();
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}
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template <typename K>
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decltype(auto) operator[](K&& k) const {
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auto keys = meta::tuplefy(key, std::forward<K>(k));
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return proxy<Table, decltype(keys)>(tbl, std::move(keys));
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}
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template <typename... Ret, typename... Args>
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decltype(auto) call(Args&&... args) {
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#if !defined(__clang__) && defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 191200000
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// MSVC is ass sometimes
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return get<function>().call<Ret...>(std::forward<Args>(args)...);
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#else
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return get<function>().template call<Ret...>(std::forward<Args>(args)...);
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#endif
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}
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template <typename... Args>
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decltype(auto) operator()(Args&&... args) {
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return call<>(std::forward<Args>(args)...);
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}
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bool valid() const {
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auto pp = stack::push_pop(tbl);
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auto p = stack::probe_get_field<std::is_same<meta::unqualified_t<Table>, global_table>::value>(lua_state(), key, lua_gettop(lua_state()));
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lua_pop(lua_state(), p.levels);
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return p;
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}
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int push() const noexcept {
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return push(this->lua_state());
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}
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int push(lua_State* L) const noexcept {
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return get<reference>().push(L);
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}
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type get_type() const {
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type t = type::none;
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auto pp = stack::push_pop(tbl);
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auto p = stack::probe_get_field<std::is_same<meta::unqualified_t<Table>, global_table>::value>(lua_state(), key, lua_gettop(lua_state()));
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if (p) {
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t = type_of(lua_state(), -1);
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}
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lua_pop(lua_state(), p.levels);
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return t;
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}
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lua_State* lua_state() const {
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return tbl.lua_state();
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}
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proxy& force() {
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if (this->valid()) {
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this->set(new_table());
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}
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return *this;
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}
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};
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template <typename Table, typename Key, typename T>
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inline bool operator==(T&& left, const proxy<Table, Key>& right) {
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typedef decltype(stack::get<T>(nullptr, 0)) U;
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return right.template get<optional<U>>() == left;
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}
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template <typename Table, typename Key, typename T>
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inline bool operator==(const proxy<Table, Key>& right, T&& left) {
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typedef decltype(stack::get<T>(nullptr, 0)) U;
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return right.template get<optional<U>>() == left;
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}
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template <typename Table, typename Key, typename T>
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inline bool operator!=(T&& left, const proxy<Table, Key>& right) {
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typedef decltype(stack::get<T>(nullptr, 0)) U;
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return right.template get<optional<U>>() != left;
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}
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template <typename Table, typename Key, typename T>
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inline bool operator!=(const proxy<Table, Key>& right, T&& left) {
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typedef decltype(stack::get<T>(nullptr, 0)) U;
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return right.template get<optional<U>>() != left;
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}
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template <typename Table, typename Key>
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inline bool operator==(lua_nil_t, const proxy<Table, Key>& right) {
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return !right.valid();
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}
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template <typename Table, typename Key>
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inline bool operator==(const proxy<Table, Key>& right, lua_nil_t) {
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return !right.valid();
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}
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template <typename Table, typename Key>
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inline bool operator!=(lua_nil_t, const proxy<Table, Key>& right) {
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return right.valid();
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}
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template <typename Table, typename Key>
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inline bool operator!=(const proxy<Table, Key>& right, lua_nil_t) {
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return right.valid();
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}
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template <bool b>
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template <typename Super>
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basic_reference<b>& basic_reference<b>::operator=(proxy_base<Super>&& r) {
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basic_reference<b> v = r;
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this->operator=(std::move(v));
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return *this;
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}
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template <bool b>
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template <typename Super>
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basic_reference<b>& basic_reference<b>::operator=(const proxy_base<Super>& r) {
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basic_reference<b> v = r;
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this->operator=(std::move(v));
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return *this;
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}
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namespace stack {
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template <typename Table, typename Key>
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struct unqualified_pusher<proxy<Table, Key>> {
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static int push(lua_State* L, const proxy<Table, Key>& p) {
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reference r = p;
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return r.push(L);
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}
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};
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} // namespace stack
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} // namespace sol
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#endif // SOL_PROXY_HPP
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