mirror of
https://github.com/ThePhD/sol2.git
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262 lines
8.5 KiB
C++
262 lines
8.5 KiB
C++
// The MIT License (MIT)
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// Copyright (c) 2013 Danny Y., Rapptz
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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_STATE_HPP
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#define SOL_STATE_HPP
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#include "error.hpp"
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#include "table.hpp"
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#include <memory>
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namespace sol {
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namespace detail {
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inline int atpanic(lua_State* L) {
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const char* message = lua_tostring(L, -1);
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std::string err = message ? message : "An unexpected error occured and forced the lua state to call atpanic";
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throw error(err);
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}
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} // detail
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enum class lib : char {
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base,
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package,
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coroutine,
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string,
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os,
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math,
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table,
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debug,
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bit32,
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io,
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count
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};
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class state {
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private:
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std::unique_ptr<lua_State, void(*)(lua_State*)> L;
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table reg;
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table global;
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public:
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state():
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L(luaL_newstate(), lua_close),
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reg(L.get(), LUA_REGISTRYINDEX),
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global(reg.get<table>(LUA_RIDX_GLOBALS)) {
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lua_atpanic(L.get(), detail::atpanic);
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}
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lua_State* lua_state() const {
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return L.get();
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}
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template<typename... Args>
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void open_libraries(Args&&... args) {
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static_assert(are_same<lib, Args...>::value, "all types must be libraries");
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if(sizeof...(args) == 0) {
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luaL_openlibs(L.get());
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return;
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}
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lib libraries[1 + sizeof...(args)] = { lib::count, std::forward<Args>(args)... };
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for(auto&& library : libraries) {
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switch(library) {
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case lib::base:
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luaL_requiref(L.get(), "base", luaopen_base, 1);
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lua_pop(L.get(), 1);
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break;
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case lib::package:
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luaL_requiref(L.get(), "package", luaopen_package, 1);
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lua_pop(L.get(), 1);
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break;
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case lib::coroutine:
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luaL_requiref(L.get(), "coroutine", luaopen_coroutine, 1);
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lua_pop(L.get(), 1);
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break;
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case lib::string:
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luaL_requiref(L.get(), "string", luaopen_string, 1);
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lua_pop(L.get(), 1);
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break;
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case lib::table:
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luaL_requiref(L.get(), "table", luaopen_table, 1);
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lua_pop(L.get(), 1);
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break;
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case lib::math:
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luaL_requiref(L.get(), "math", luaopen_math, 1);
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lua_pop(L.get(), 1);
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break;
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case lib::bit32:
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luaL_requiref(L.get(), "bit32", luaopen_bit32, 1);
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lua_pop(L.get(), 1);
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break;
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case lib::io:
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luaL_requiref(L.get(), "io", luaopen_io, 1);
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lua_pop(L.get(), 1);
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break;
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case lib::os:
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luaL_requiref(L.get(), "os", luaopen_os, 1);
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lua_pop(L.get(), 1);
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break;
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case lib::debug:
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luaL_requiref(L.get(), "debug", luaopen_debug, 1);
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lua_pop(L.get(), 1);
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break;
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case lib::count:
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break;
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}
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}
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}
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void script(const std::string& code) {
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if(luaL_dostring(L.get(), code.c_str())) {
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lua_error(L.get());
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}
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}
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void open_file(const std::string& filename) {
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if(luaL_dofile(L.get(), filename.c_str())) {
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lua_error(L.get());
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}
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}
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template<typename... Args, typename... Keys>
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auto get(Keys&&... keys) const
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-> decltype(global.get(types<Args...>(), std::forward<Keys>(keys)...)) {
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return global.get(types<Args...>(), std::forward<Keys>(keys)...);
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}
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template<typename T, typename U>
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state& set(T&& key, U&& value) {
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global.set(std::forward<T>(key), std::forward<U>(value));
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return *this;
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}
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template<typename T>
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SOL_DEPRECATED table& set_userdata(usertype<T>& user) {
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return set_usertype(user);
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}
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template<typename Key, typename T>
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SOL_DEPRECATED table& set_userdata(Key&& key, usertype<T>& user) {
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return set_usertype(std::forward<Key>(key), user);
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}
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template<typename Class, typename... CTor, typename... Args>
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SOL_DEPRECATED state& new_userdata(const std::string& name, Args&&... args) {
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return new_usertype<Class>(name, std::forward<Args>(args)...);
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}
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template<typename Class, typename... CArgs, typename... Args>
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SOL_DEPRECATED state& new_userdata(const std::string& name, constructors<CArgs...> ctor, Args&&... args) {
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return new_usertype(name, std::move(ctor), std::forward<Args>(args)...);
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}
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template<typename T>
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state& 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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state& set_usertype(Key&& key, usertype<T>& user) {
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global.set_usertype(std::forward<Key>(key), user);
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return *this;
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}
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template<typename Class, typename... CTor, typename... Args>
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state& new_usertype(const std::string& name, Args&&... args) {
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constructors<types<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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state& 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 T>
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table create_table(T&& key, int narr = 0, int nrec = 0) {
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lua_createtable(L.get(), narr, nrec);
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table result(L.get());
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lua_pop(L.get(), 1);
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global.set(std::forward<T>(key), result);
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return result;
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}
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table create_table(int narr = 0, int nrec = 0) {
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lua_createtable(L.get(), narr, nrec);
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table result(L.get());
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lua_pop(L.get(), 1);
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return result;
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}
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table global_table() const {
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return global;
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}
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table registry() const {
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return reg;
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}
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template<typename T>
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proxy<table, T> operator[](T&& key) {
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return global[std::forward<T>(key)];
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}
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template<typename T>
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proxy<const table, T> operator[](T&& key) const {
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return global[std::forward<T>(key)];
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}
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template<typename... Args, typename R, typename Key>
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state& set_function(Key&& key, R fun_ptr(Args...)){
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global.set_function(std::forward<Key>(key), fun_ptr);
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return *this;
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}
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template<typename Sig, typename Key>
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state& set_function(Key&& key, Sig* fun_ptr){
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global.set_function(std::forward<Key>(key), fun_ptr);
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return *this;
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}
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template<typename... Args, typename R, typename C, typename T, typename Key>
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state& set_function(Key&& key, R (C::*mem_ptr)(Args...), T&& obj) {
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global.set_function(std::forward<Key>(key), mem_ptr, std::forward<T>(obj));
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return *this;
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}
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template<typename Sig, typename C, typename T, typename Key>
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state& set_function(Key&& key, Sig C::* mem_ptr, T&& obj) {
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global.set_function(std::forward<Key>(key), mem_ptr, std::forward<T>(obj));
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return *this;
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}
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template<typename... Sig, typename Fx, typename Key>
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state& set_function(Key&& key, Fx&& fx) {
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global.set_function<Sig...>(std::forward<Key>(key), std::forward<Fx>(fx));
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return *this;
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}
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};
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} // sol
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#endif // SOL_STATE_HPP
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