mirror of
https://github.com/ThePhD/sol2.git
synced 2024-03-22 13:10:44 +08:00
666 lines
19 KiB
C++
666 lines
19 KiB
C++
// The MIT License (MIT)
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// Copyright (c) 2013-2016 Rapptz, ThePhD and contributors
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#ifndef SOL_TYPES_HPP
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#define SOL_TYPES_HPP
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#include "optional.hpp"
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#include "compatibility.hpp"
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#include "traits.hpp"
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#include "string_shim.hpp"
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#include <array>
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#include <string>
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namespace sol {
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namespace detail {
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#ifdef SOL_NO_EXCEPTIONS
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template <lua_CFunction f>
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int static_trampoline(lua_State* L) {
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return f(L);
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}
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template <typename Fx, typename... Args>
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int trampoline(lua_State* L, Fx&& f, Args&&... args) {
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return f(L, std::forward<Args>(args)...);
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}
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inline int c_trampoline(lua_State* L, lua_CFunction f) {
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return trampoline(L, f);
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}
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#else
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template <lua_CFunction f>
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int static_trampoline(lua_State* L) {
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try {
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return f(L);
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}
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catch (const char *s) {
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lua_pushstring(L, s);
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}
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catch (const std::exception& e) {
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lua_pushstring(L, e.what());
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}
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catch (...) {
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lua_pushstring(L, "caught (...) exception");
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}
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return lua_error(L);
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}
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template <typename Fx, typename... Args>
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int trampoline(lua_State* L, Fx&& f, Args&&... args) {
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try {
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return f(L, std::forward<Args>(args)...);
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}
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catch (const char *s) {
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lua_pushstring(L, s);
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}
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catch (const std::exception& e) {
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lua_pushstring(L, e.what());
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}
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catch (...) {
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lua_pushstring(L, "caught (...) exception");
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}
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return lua_error(L);
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}
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inline int c_trampoline(lua_State* L, lua_CFunction f) {
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return trampoline(L, f);
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}
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#endif // Exceptions vs. No Exceptions
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template <typename T>
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struct unique_usertype {};
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template <typename T>
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struct implicit_wrapper {
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T& item;
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implicit_wrapper(T* item) : item(*item) {}
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implicit_wrapper(T& item) : item(item) {}
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operator T& () {
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return item;
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}
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operator T* () {
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return std::addressof(item);
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}
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};
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} // detail
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struct nil_t {};
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const nil_t nil{};
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inline bool operator==(nil_t, nil_t) { return true; }
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inline bool operator!=(nil_t, nil_t) { return false; }
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struct metatable_key_t {};
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const metatable_key_t metatable_key = {};
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struct no_metatable_t {};
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const no_metatable_t no_metatable = {};
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typedef std::remove_pointer_t<lua_CFunction> lua_r_CFunction;
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template <typename T>
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struct unique_usertype_traits {
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typedef T type;
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typedef T actual_type;
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static const bool value = false;
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template <typename U>
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static bool is_null(U&&) {
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return false;
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}
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template <typename U>
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static auto get(U&& value) {
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return std::addressof(detail::deref(value));
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}
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};
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template <typename T>
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struct unique_usertype_traits<std::shared_ptr<T>> {
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typedef T type;
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typedef std::shared_ptr<T> actual_type;
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static const bool value = true;
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static bool is_null(const actual_type& value) {
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return value == nullptr;
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}
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static type* get(const actual_type& p) {
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return p.get();
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}
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};
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template <typename T, typename D>
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struct unique_usertype_traits<std::unique_ptr<T, D>> {
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typedef T type;
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typedef std::unique_ptr<T, D> actual_type;
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static const bool value = true;
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static bool is_null(const actual_type& value) {
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return value == nullptr;
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}
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static type* get(const actual_type& p) {
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return p.get();
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}
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};
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template <typename T>
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struct non_null {};
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template<typename... Args>
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struct function_sig {};
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struct up_value_index {
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int index;
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up_value_index(int idx) : index(lua_upvalueindex(idx)) {}
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operator int() const { return index; }
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};
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struct absolute_index {
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int index;
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absolute_index(lua_State* L, int idx) : index(lua_absindex(L, idx)) {}
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operator int() const { return index; }
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};
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struct lightuserdata_value {
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void* value;
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lightuserdata_value(void* data) : value(data) {}
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operator void*() const { return value; }
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};
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struct userdata_value {
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void* value;
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userdata_value(void* data) : value(data) {}
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operator void*() const { return value; }
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};
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template <typename L>
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struct light {
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L* value;
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light(L& x) : value(std::addressof(x)) {}
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light(L* x) : value(x) {}
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light(void* x) : value(static_cast<L*>(x)) {}
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operator L* () const { return value; }
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operator L& () const { return *value; }
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};
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template <typename T>
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auto make_light(T& l) {
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typedef meta::unwrapped_t<std::remove_pointer_t<std::remove_pointer_t<T>>> L;
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return light<L>(l);
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}
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template <typename U>
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struct user {
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U value;
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user(U x) : value(std::forward<U>(x)) {}
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operator U* () { return std::addressof(value); }
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operator U& () { return value; }
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};
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template <typename T>
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auto make_user(T&& u) {
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typedef meta::unwrapped_t<meta::unqualified_t<T>> U;
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return user<U>(std::forward<T>(u));
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}
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template <typename T>
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struct metatable_registry_key {
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T key;
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metatable_registry_key(T key) : key(std::forward<T>(key)) {}
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};
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template <typename T>
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auto meta_registry_key(T&& key) {
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typedef meta::unqualified_t<T> K;
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return metatable_registry_key<K>(std::forward<T>(key));
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}
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template <typename... Upvalues>
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struct closure {
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lua_CFunction c_function;
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std::tuple<Upvalues...> upvalues;
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closure(lua_CFunction f, Upvalues... upvalues) : c_function(f), upvalues(std::forward<Upvalues>(upvalues)...) {}
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};
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template <>
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struct closure<> {
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lua_CFunction c_function;
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int upvalues;
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closure(lua_CFunction f, int upvalues = 0) : c_function(f), upvalues(upvalues) {}
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};
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typedef closure<> c_closure;
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template <typename... Args>
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closure<Args...> make_closure(lua_CFunction f, Args&&... args) {
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return closure<Args...>(f, std::forward<Args>(args)...);
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}
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struct this_state {
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lua_State* L;
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operator lua_State* () const {
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return L;
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}
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lua_State* operator-> () const {
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return L;
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}
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};
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enum class call_syntax {
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dot = 0,
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colon = 1
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};
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enum class call_status : int {
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ok = LUA_OK,
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yielded = LUA_YIELD,
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runtime = LUA_ERRRUN,
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memory = LUA_ERRMEM,
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handler = LUA_ERRERR,
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gc = LUA_ERRGCMM
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};
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enum class thread_status : int {
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ok = LUA_OK,
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yielded = LUA_YIELD,
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runtime = LUA_ERRRUN,
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memory = LUA_ERRMEM,
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gc = LUA_ERRGCMM,
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handler = LUA_ERRERR,
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dead,
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};
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enum class load_status : int {
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ok = LUA_OK,
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syntax = LUA_ERRSYNTAX,
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memory = LUA_ERRMEM,
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gc = LUA_ERRGCMM,
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file = LUA_ERRFILE,
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};
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enum class type : int {
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none = LUA_TNONE,
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nil = LUA_TNIL,
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string = LUA_TSTRING,
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number = LUA_TNUMBER,
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thread = LUA_TTHREAD,
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boolean = LUA_TBOOLEAN,
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function = LUA_TFUNCTION,
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userdata = LUA_TUSERDATA,
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lightuserdata = LUA_TLIGHTUSERDATA,
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table = LUA_TTABLE,
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poly = none | nil | string | number | thread |
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table | boolean | function | userdata | lightuserdata
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};
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enum class meta_function {
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construct,
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index,
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new_index,
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mode,
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call,
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metatable,
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to_string,
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length,
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unary_minus,
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addition,
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subtraction,
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multiplication,
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division,
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modulus,
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power_of,
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involution = power_of,
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concatenation,
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equal_to,
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less_than,
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less_than_or_equal_to,
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garbage_collect,
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call_function = call,
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};
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typedef meta_function meta_method;
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const std::array<std::string, 2> meta_variable_names = { {
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"__index",
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"__newindex",
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} };
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const std::array<std::string, 21> meta_function_names = { {
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"new",
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"__index",
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"__newindex",
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"__mode",
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"__call",
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"__metatable",
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"__tostring",
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"__len",
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"__unm",
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"__add",
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"__sub",
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"__mul",
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"__div",
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"__mod",
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"__pow",
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"__concat",
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"__eq",
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"__lt",
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"__le",
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"__gc",
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} };
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inline const std::string& name_of(meta_function mf) {
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return meta_function_names[static_cast<int>(mf)];
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}
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inline type type_of(lua_State* L, int index) {
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return static_cast<type>(lua_type(L, index));
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}
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inline int type_panic(lua_State* L, int index, type expected, type actual) {
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return luaL_error(L, "stack index %d, expected %s, received %s", index,
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expected == type::poly ? "anything" : lua_typename(L, static_cast<int>(expected)),
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expected == type::poly ? "anything" : lua_typename(L, static_cast<int>(actual))
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);
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}
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// Specify this function as the handler for lua::check if you know there's nothing wrong
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inline int no_panic(lua_State*, int, type, type) noexcept {
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return 0;
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}
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inline void type_error(lua_State* L, int expected, int actual) {
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luaL_error(L, "expected %s, received %s", lua_typename(L, expected), lua_typename(L, actual));
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}
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inline void type_error(lua_State* L, type expected, type actual) {
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type_error(L, static_cast<int>(expected), static_cast<int>(actual));
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}
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inline void type_assert(lua_State* L, int index, type expected, type actual) {
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if (expected != type::poly && expected != actual) {
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type_panic(L, index, expected, actual);
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}
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}
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inline void type_assert(lua_State* L, int index, type expected) {
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type actual = type_of(L, index);
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type_assert(L, index, expected, actual);
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}
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inline std::string type_name(lua_State* L, type t) {
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return lua_typename(L, static_cast<int>(t));
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}
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class reference;
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class stack_reference;
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template<typename T>
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class usertype;
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template <bool, typename T>
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class basic_table_core;
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template <bool b>
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using table_core = basic_table_core<b, reference>;
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template <bool b>
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using stack_table_core = basic_table_core<b, stack_reference>;
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typedef table_core<false> table;
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typedef table_core<true> global_table;
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typedef stack_table_core<false> stack_table;
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typedef stack_table_core<true> stack_global_table;
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template <typename T>
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class basic_function;
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template <typename T>
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class basic_protected_function;
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using function = basic_function<reference>;
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using protected_function = basic_protected_function<reference>;
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using stack_function = basic_function<stack_reference>;
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using stack_protected_function = basic_protected_function<stack_reference>;
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template <typename base_t>
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class basic_object;
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template <typename base_t>
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class basic_userdata;
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template <typename base_t>
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class basic_lightuserdata;
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struct variadic_args;
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using object = basic_object<reference>;
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using stack_object = basic_object<stack_reference>;
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using userdata = basic_userdata<reference>;
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using stack_userdata = basic_userdata<stack_reference>;
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using lightuserdata = basic_lightuserdata<reference>;
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using stack_lightuserdata = basic_lightuserdata<stack_reference>;
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class coroutine;
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class thread;
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struct variadic_args;
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struct this_state;
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namespace detail {
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template <typename T, typename = void>
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struct lua_type_of : std::integral_constant<type, type::userdata> {};
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template <>
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struct lua_type_of<std::string> : std::integral_constant<type, type::string> {};
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template <>
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struct lua_type_of<std::wstring> : std::integral_constant<type, type::string> {};
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template <>
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struct lua_type_of<std::u16string> : std::integral_constant<type, type::string> {};
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template <>
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struct lua_type_of<std::u32string> : std::integral_constant<type, type::string> {};
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template <std::size_t N>
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struct lua_type_of<char[N]> : std::integral_constant<type, type::string> {};
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template <std::size_t N>
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struct lua_type_of<wchar_t[N]> : std::integral_constant<type, type::string> {};
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template <std::size_t N>
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struct lua_type_of<char16_t[N]> : std::integral_constant<type, type::string> {};
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template <std::size_t N>
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struct lua_type_of<char32_t[N]> : std::integral_constant<type, type::string> {};
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template <>
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struct lua_type_of<char> : std::integral_constant<type, type::string> {};
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template <>
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struct lua_type_of<wchar_t> : std::integral_constant<type, type::string> {};
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template <>
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struct lua_type_of<char16_t> : std::integral_constant<type, type::string> {};
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template <>
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struct lua_type_of<char32_t> : std::integral_constant<type, type::string> {};
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template <>
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struct lua_type_of<const char*> : std::integral_constant<type, type::string> {};
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template <>
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struct lua_type_of<const char16_t*> : std::integral_constant<type, type::string> {};
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template <>
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struct lua_type_of<const char32_t*> : std::integral_constant<type, type::string> {};
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template <>
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struct lua_type_of<string_detail::string_shim> : std::integral_constant<type, type::string> {};
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template <>
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struct lua_type_of<bool> : std::integral_constant<type, type::boolean> {};
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template <>
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struct lua_type_of<nil_t> : std::integral_constant<type, type::nil> { };
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template <>
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struct lua_type_of<nullopt_t> : std::integral_constant<type, type::nil> { };
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template <>
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struct lua_type_of<sol::error> : std::integral_constant<type, type::string> { };
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template <bool b, typename Base>
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struct lua_type_of<basic_table_core<b, Base>> : std::integral_constant<type, type::table> { };
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template <>
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struct lua_type_of<reference> : std::integral_constant<type, type::poly> {};
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template <>
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struct lua_type_of<stack_reference> : std::integral_constant<type, type::poly> {};
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template <typename Base>
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struct lua_type_of<basic_object<Base>> : std::integral_constant<type, type::poly> {};
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template <typename... Args>
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struct lua_type_of<std::tuple<Args...>> : std::integral_constant<type, type::poly> {};
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template <typename A, typename B>
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struct lua_type_of<std::pair<A, B>> : std::integral_constant<type, type::poly> {};
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template <>
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struct lua_type_of<lightuserdata_value> : std::integral_constant<type, type::lightuserdata> {};
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template <>
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struct lua_type_of<userdata_value> : std::integral_constant<type, type::userdata> {};
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template <typename T>
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struct lua_type_of<light<T>> : std::integral_constant<type, type::lightuserdata> {};
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template <typename T>
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struct lua_type_of<user<T>> : std::integral_constant<type, type::userdata> {};
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template <typename Base>
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struct lua_type_of<basic_lightuserdata<Base>> : std::integral_constant<type, type::lightuserdata> {};
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template <typename Base>
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struct lua_type_of<basic_userdata<Base>> : std::integral_constant<type, type::userdata> {};
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template <>
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struct lua_type_of<lua_CFunction> : std::integral_constant<type, type::function> {};
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template <>
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struct lua_type_of<std::remove_pointer_t<lua_CFunction>> : std::integral_constant<type, type::function> {};
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template <typename Base>
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struct lua_type_of<basic_function<Base>> : std::integral_constant<type, type::function> {};
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template <typename Base>
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struct lua_type_of<basic_protected_function<Base>> : std::integral_constant<type, type::function> {};
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template <>
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struct lua_type_of<coroutine> : std::integral_constant<type, type::function> {};
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template <>
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struct lua_type_of<thread> : std::integral_constant<type, type::thread> {};
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template <typename Signature>
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struct lua_type_of<std::function<Signature>> : std::integral_constant<type, type::function> {};
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template <typename T>
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struct lua_type_of<optional<T>> : std::integral_constant<type, type::poly> {};
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template <>
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struct lua_type_of<variadic_args> : std::integral_constant<type, type::poly> {};
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template <typename T>
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struct lua_type_of<T*> : std::integral_constant<type, type::userdata> {};
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template <typename T>
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struct lua_type_of<T, std::enable_if_t<std::is_arithmetic<T>::value>> : std::integral_constant<type, type::number> {};
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|
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template <typename T>
|
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struct lua_type_of<T, std::enable_if_t<std::is_enum<T>::value>> : std::integral_constant<type, type::number> {};
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|
|
template <>
|
|
struct lua_type_of<meta_function> : std::integral_constant<type, type::string> {};
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|
|
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template <>
|
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struct lua_type_of<type> : std::integral_constant<type, type::none> {};
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template <>
|
|
struct lua_type_of<this_state> : std::integral_constant<type, type::none> {};
|
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} // detail
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template <typename T>
|
|
struct lua_type_of : detail::lua_type_of<T> {};
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template <typename T>
|
|
struct is_lua_primitive : std::integral_constant<bool,
|
|
type::userdata != lua_type_of<meta::unqualified_t<T>>::value
|
|
|| std::is_base_of<reference, meta::unqualified_t<T>>::value
|
|
|| std::is_base_of<stack_reference, meta::unqualified_t<T>>::value
|
|
|| meta::is_specialization_of<std::tuple, meta::unqualified_t<T>>::value
|
|
|| meta::is_specialization_of<std::pair, meta::unqualified_t<T>>::value
|
|
> { };
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|
|
|
template <typename T>
|
|
struct is_lua_primitive<std::reference_wrapper<T>> : std::true_type { };
|
|
template <typename T>
|
|
struct is_lua_primitive<optional<T>> : std::true_type {};
|
|
template <typename T>
|
|
struct is_lua_primitive<T*> : std::true_type {};
|
|
template <>
|
|
struct is_lua_primitive<userdata_value> : std::true_type {};
|
|
template <>
|
|
struct is_lua_primitive<lightuserdata_value> : std::true_type {};
|
|
template <typename T>
|
|
struct is_lua_primitive<non_null<T>> : is_lua_primitive<T*> {};
|
|
|
|
template <typename T>
|
|
struct is_proxy_primitive : is_lua_primitive<T> { };
|
|
|
|
template <typename T>
|
|
struct is_unique_usertype : std::integral_constant<bool, unique_usertype_traits<T>::value> {};
|
|
|
|
template <typename T>
|
|
struct is_transparent_argument : std::false_type {};
|
|
|
|
template <>
|
|
struct is_transparent_argument<this_state> : std::true_type {};
|
|
|
|
template <>
|
|
struct is_transparent_argument<variadic_args> : std::true_type {};
|
|
|
|
template <typename Signature>
|
|
struct lua_bind_traits : meta::bind_traits<Signature> {
|
|
private:
|
|
typedef meta::bind_traits<Signature> base_t;
|
|
public:
|
|
static const std::size_t true_arity = base_t::arity;
|
|
static const std::size_t arity = base_t::arity - meta::count_for<is_transparent_argument, typename base_t::args_list>::value;
|
|
static const std::size_t true_free_arity = base_t::free_arity;
|
|
static const std::size_t free_arity = base_t::free_arity - meta::count_for<is_transparent_argument, typename base_t::args_list>::value;
|
|
};
|
|
|
|
template <typename T>
|
|
struct is_table : std::false_type {};
|
|
|
|
template <bool x, typename T>
|
|
struct is_table<basic_table_core<x, T>> : std::true_type {};
|
|
|
|
template<typename T>
|
|
inline type type_of() {
|
|
return lua_type_of<meta::unqualified_t<T>>::value;
|
|
}
|
|
} // sol
|
|
|
|
#endif // SOL_TYPES_HPP
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