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luaaa.hpp
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luaaa.hpp
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/*
Copyright (c) 2019 gengyong
https://github.com/gengyong/luaaa
licensed under MIT License.
*/
#ifndef HEADER_LUAAA_HPP
#define HEADER_LUAAA_HPP
#define LUAAA_NS luaaa
/// set LUAAA_WITHOUT_CPP_STDLIB to disable C++ std libs.
//#define LUAAA_WITHOUT_CPP_STDLIB 1
extern "C"
{
#include "lua.h"
#include "lualib.h"
#include "lauxlib.h"
}
#if !defined LUA_VERSION_NUM || LUA_VERSION_NUM <= 501
inline void luaL_setfuncs(lua_State *L, const luaL_Reg *l, int nup) {
luaL_checkstack(L, nup + 1, "too many upvalues");
for (; l->name != NULL; l++) {
int i;
lua_pushstring(L, l->name);
for (i = 0; i < nup; i++)
lua_pushvalue(L, -(nup + 1));
lua_pushcclosure(L, l->func, nup);
lua_settable(L, -(nup + 3));
}
lua_pop(L, nup);
}
#endif
#if defined(LUA_VERSION_NUM) && LUA_VERSION_NUM > 501 && !defined(LUA_COMPAT_MODULE)
# define USE_NEW_MODULE_REGISTRY 1
#else
# define USE_NEW_MODULE_REGISTRY 0
#endif
#include <typeinfo>
#include <utility>
#if defined(_MSC_VER)
# define RTTI_CLASS_NAME(a) typeid(a).name() //vc always has this operator even if RTTI was disabled.
#elif __GXX_RTTI
# define RTTI_CLASS_NAME(a) typeid(a).name()
#elif _HAS_STATIC_RTTI
# define RTTI_CLASS_NAME(a) typeid(a).name()
#else
# define RTTI_CLASS_NAME(a) "?"
#endif
#ifndef LUAAA_WITHOUT_CPP_STDLIB
# include <string>
#else
# include <type_traits>
# include <cstring>
#endif
inline void LUAAA_DUMP(lua_State * state, const char * name = "") {
printf(">>>>>>>>>>>>>>>>>>>>>>>>>[%s]\n", name);
int top = lua_gettop(state);
for (int i = 1; i <= top; i++) {
printf("%d\t%s\t", i, luaL_typename(state, i));
switch (lua_type(state, i)) {
case LUA_TNUMBER:
printf("%g\n", lua_tonumber(state, i));
break;
case LUA_TSTRING:
printf("%s\n", lua_tostring(state, i));
break;
case LUA_TBOOLEAN:
printf("%s\n", (lua_toboolean(state, i) ? "true" : "false"));
break;
case LUA_TNIL:
printf("%s\n", "nil");
break;
default:
printf("%p\n", lua_topointer(state, i));
break;
}
}
printf("<<<<<<<<<<<<<<<<<<<<<<<<<\n");
}
namespace LUAAA_NS
{
//========================================================
// Lua Class
//========================================================
template <typename> struct LuaClass;
//========================================================
// Lua stack operator
//========================================================
template <typename T> struct LuaStack
{
inline static T& get(lua_State * state, int idx)
{
#ifndef LUAAA_WITHOUT_CPP_STDLIB
luaL_argcheck(state, LuaClass<T>::klassName != nullptr, 1, (std::string("cpp class `") + RTTI_CLASS_NAME(T) + "` not export").c_str());
#else
luaL_argcheck(state, LuaClass<T>::klassName != nullptr, 1, "cpp class not export");
#endif
T ** t = (T**)luaL_checkudata(state, idx, LuaClass<T>::klassName);
luaL_argcheck(state, t != NULL, 1, "invalid user data");
luaL_argcheck(state, *t != NULL, 1, "invalid user data");
return (**t);
}
inline static void put(lua_State * L, T * t)
{
lua_pushlightuserdata(L, t);
}
};
template <typename T> struct LuaStack<const T> : public LuaStack<T> {};
template <typename T> struct LuaStack<T&> : public LuaStack<T> {};
template <typename T> struct LuaStack<const T&> : public LuaStack<T> {};
template <typename T> struct LuaStack<volatile T&> : public LuaStack<T>
{
inline static void put(lua_State * L, volatile T & t)
{
LuaStack<T>::put(L, const_cast<const T &>(t));
}
};
template <typename T> struct LuaStack<const volatile T&> : public LuaStack<T>
{
inline static void put(lua_State * L, const volatile T & t)
{
LuaStack<T>::put(L, const_cast<const T &>(t));
}
};
template <typename T> struct LuaStack<T&&> : public LuaStack<T>
{
inline static void put(lua_State * L, T && t)
{
LuaStack<T>::put(L, std::forward<T>(t));
}
};
template <typename T> struct LuaStack<T*>
{
inline static T * get(lua_State * state, int idx)
{
if (lua_islightuserdata(state, idx))
{
T * t = (T*)lua_touserdata(state, idx);
return t;
}
else if (lua_isuserdata(state, idx))
{
if (LuaClass<T*>::klassName != nullptr)
{
T ** t = (T**)luaL_checkudata(state, idx, LuaClass<T*>::klassName);
luaL_argcheck(state, t != NULL, 1, "invalid user data");
luaL_argcheck(state, *t != NULL, 1, "invalid user data");
return *t;
}
if (LuaClass<T>::klassName != nullptr)
{
T ** t = (T**)luaL_checkudata(state, idx, LuaClass<T>::klassName);
luaL_argcheck(state, t != NULL, 1, "invalid user data");
luaL_argcheck(state, *t != NULL, 1, "invalid user data");
return *t;
}
}
return nullptr;
}
inline static void put(lua_State * L, T * t)
{
lua_pushlightuserdata(L, t);
}
};
template<>
struct LuaStack<float>
{
inline static float get(lua_State * L, int idx)
{
if (lua_isnumber(L, idx) || lua_isstring(L, idx))
{
return float(lua_tonumber(L, idx));
}
else
{
luaL_checktype(L, idx, LUA_TNUMBER);
}
return 0;
}
inline static void put(lua_State * L, const float & t)
{
lua_pushnumber(L, t);
}
};
template<>
struct LuaStack<double>
{
inline static double get(lua_State * L, int idx)
{
if (lua_isnumber(L, idx) || lua_isstring(L, idx))
{
return double(lua_tonumber(L, idx));
}
else
{
luaL_checktype(L, idx, LUA_TNUMBER);
}
return 0;
}
inline static void put(lua_State * L, const double & t)
{
lua_pushnumber(L, t);
}
};
template<>
struct LuaStack<int>
{
inline static int get(lua_State * L, int idx)
{
if (lua_isnumber(L, idx) || lua_isstring(L, idx))
{
return int(lua_tointeger(L, idx));
}
else
{
luaL_checktype(L, idx, LUA_TNUMBER);
}
return 0;
}
inline static void put(lua_State * L, const int & t)
{
lua_pushinteger(L, t);
}
};
template<>
struct LuaStack<bool>
{
inline static bool get(lua_State * L, int idx)
{
luaL_checktype(L, idx, LUA_TBOOLEAN);
return lua_toboolean(L, idx) != 0;
}
inline static void put(lua_State * L, const bool & t)
{
lua_pushboolean(L, t);
}
};
template<>
struct LuaStack<const char *>
{
inline static const char * get(lua_State * L, int idx)
{
switch (lua_type(L, idx))
{
case LUA_TBOOLEAN:
return (lua_toboolean(L, idx) ? "true" : "false");
case LUA_TNUMBER:
return lua_tostring(L, idx);
case LUA_TSTRING:
return lua_tostring(L, idx);
default:
luaL_checktype(L, idx, LUA_TSTRING);
break;
}
return "";
}
inline static void put(lua_State * L, const char * s)
{
lua_pushstring(L, s);
}
};
template<>
struct LuaStack<char *>
{
inline static char * get(lua_State * L, int idx)
{
return const_cast<char*>(LuaStack<const char *>::get(L, idx));
}
inline static void put(lua_State * L, const char * s)
{
LuaStack<const char *>::put(L, s);
}
};
#ifndef LUAAA_WITHOUT_CPP_STDLIB
template<>
struct LuaStack<std::string>
{
inline static std::string get(lua_State * L, int idx)
{
return LuaStack<const char *>::get(L, idx);
}
inline static void put(lua_State * L, const std::string& s)
{
LuaStack<const char *>::put(L, s.c_str());
}
};
#endif
template<>
struct LuaStack<lua_State *>
{
inline static lua_State * get(lua_State * L, int)
{
return L;
}
inline static void put(lua_State *, lua_State *)
{
}
};
// push ret data to stack
template <typename T>
inline void LuaStackReturn(lua_State * L, T t)
{
lua_settop(L, 0);
LuaStack<T>::put(L, t);
}
#define IMPLEMENT_CALLBACK_INVOKER(CALLCONV) \
template<typename RET, typename ...ARGS> \
struct LuaStack<RET(CALLCONV*)(ARGS...)> \
{ \
typedef RET(CALLCONV*FTYPE)(ARGS...); \
inline static FTYPE get(lua_State * L, int idx) \
{ \
static lua_State * cacheLuaState = nullptr; \
static int cacheLuaFuncId = 0; \
struct HelperClass \
{ \
static RET CALLCONV f_callback(ARGS... args) \
{ \
lua_rawgeti(cacheLuaState, LUA_REGISTRYINDEX, cacheLuaFuncId); \
if (lua_isfunction(cacheLuaState, -1)) \
{ \
int initParams[] = { (LuaStack<ARGS>::put(cacheLuaState, args), 0)..., 0 }; \
if (lua_pcall(cacheLuaState, sizeof...(ARGS), 1, 0) != 0) \
{ \
lua_error(cacheLuaState); \
} \
luaL_unref(cacheLuaState, LUA_REGISTRYINDEX, cacheLuaFuncId); \
} \
else \
{ \
lua_pushnil(cacheLuaState); \
} \
return LuaStack<RET>::get(cacheLuaState, lua_gettop(cacheLuaState)); \
} \
}; \
if (lua_isfunction(L, idx)) \
{ \
cacheLuaState = L; \
lua_pushvalue(L, idx); \
cacheLuaFuncId = luaL_ref(L, LUA_REGISTRYINDEX); \
return HelperClass::f_callback; \
} \
return nullptr; \
} \
inline void put(lua_State * L, FTYPE f) \
{ \
lua_pushcfunction(L, NonMemberFunctionCaller(f)); \
} \
}; \
template<typename ...ARGS> \
struct LuaStack<void(CALLCONV*)(ARGS...)> \
{ \
typedef void(CALLCONV*FTYPE)(ARGS...); \
inline static FTYPE get(lua_State * L, int idx) \
{ \
static lua_State * cacheLuaState = nullptr; \
static int cacheLuaFuncId = 0; \
struct HelperClass \
{ \
static void CALLCONV f_callback(ARGS... args) \
{ \
lua_rawgeti(cacheLuaState, LUA_REGISTRYINDEX, cacheLuaFuncId); \
if (lua_isfunction(cacheLuaState, -1)) \
{ \
int initParams[] = { (LuaStack<ARGS>::put(cacheLuaState, args), 0)..., 0 }; \
if (lua_pcall(cacheLuaState, sizeof...(ARGS), 1, 0) != 0) \
{ \
lua_error(cacheLuaState); \
} \
luaL_unref(cacheLuaState, LUA_REGISTRYINDEX, cacheLuaFuncId); \
} \
return; \
} \
}; \
if (lua_isfunction(L, idx)) \
{ \
cacheLuaState = L; \
lua_pushvalue(L, idx); \
cacheLuaFuncId = luaL_ref(L, LUA_REGISTRYINDEX); \
return HelperClass::f_callback; \
} \
return nullptr; \
} \
inline void put(lua_State * L, FTYPE f) \
{ \
lua_pushcfunction(L, NonMemberFunctionCaller(f)); \
} \
};
//========================================================
// non-member function caller & static member function caller
//========================================================
template<typename TRET>
inline TRET stackOperatorCaller(lua_State* state, TRET(*getter)(lua_State*, int), const int count, const int skip, int * pidx)
{
#if defined(__clang__)
int offset = (*pidx) + skip + 1;
#else
int offset = (count - (*pidx)) + skip;
#endif
++(*pidx);
return (*getter)(state, offset);
}
#define IMPLEMENT_FUNCTION_CALLER(CALLERNAME, CALLCONV, SKIPPARAM) \
template<typename TRET, typename ...ARGS> \
lua_CFunction CALLERNAME(TRET(CALLCONV*func)(ARGS...)) \
{ \
typedef decltype(func) FTYPE; (void)(func); \
struct HelperClass \
{ \
static int Invoke(lua_State* state) \
{ \
void * calleePtr = lua_touserdata(state, lua_upvalueindex(1)); \
luaL_argcheck(state, calleePtr, 1, "cpp closure function not found."); \
if (calleePtr) \
{ \
int idx = 0; (void)(idx); \
LuaStackReturn<TRET>(state, (*(FTYPE*)(calleePtr))(stackOperatorCaller(state, LuaStack<ARGS>::get, sizeof...(ARGS), SKIPPARAM, &idx)...)); \
return 1; \
} \
return 0; \
} \
}; \
return HelperClass::Invoke; \
} \
template<typename ...ARGS> \
lua_CFunction CALLERNAME(void(CALLCONV*func)(ARGS...)) \
{ \
typedef decltype(func) FTYPE; (void)(func); \
struct HelperClass \
{ \
static int Invoke(lua_State* state) \
{ \
void * calleePtr = lua_touserdata(state, lua_upvalueindex(1)); \
luaL_argcheck(state, calleePtr, 1, "cpp closure function not found."); \
if (calleePtr) \
{ \
int idx = 0; (void)(idx); \
(*(FTYPE*)(calleePtr))(stackOperatorCaller(state, LuaStack<ARGS>::get, sizeof...(ARGS), SKIPPARAM, &idx)...); \
} \
return 0; \
} \
}; \
return HelperClass::Invoke; \
}
#if defined(_MSC_VER)
IMPLEMENT_FUNCTION_CALLER(NonMemberFunctionCaller, __cdecl, 0);
IMPLEMENT_FUNCTION_CALLER(MemberFunctionCaller, __cdecl, 1);
IMPLEMENT_CALLBACK_INVOKER(__cdecl);
# ifdef _M_CEE
IMPLEMENT_FUNCTION_CALLER(NonMemberFunctionCaller, __clrcall, 0);
IMPLEMENT_FUNCTION_CALLER(MemberFunctionCaller, __clrcall, 1);
IMPLEMENT_CALLBACK_INVOKER(__clrcall);
# endif
# if defined(_M_IX86) && !defined(_M_CEE)
IMPLEMENT_FUNCTION_CALLER(NonMemberFunctionCaller, __fastcall, 0);
IMPLEMENT_FUNCTION_CALLER(MemberFunctionCaller, __fastcall, 1);
IMPLEMENT_CALLBACK_INVOKER(__fastcall);
# endif
# ifdef _M_IX86
IMPLEMENT_FUNCTION_CALLER(NonMemberFunctionCaller, __stdcall, 0);
IMPLEMENT_FUNCTION_CALLER(MemberFunctionCaller, __stdcall, 1);
IMPLEMENT_CALLBACK_INVOKER(__stdcall);
# endif
# if ((defined(_M_IX86) && _M_IX86_FP >= 2) || defined(_M_X64)) && !defined(_M_CEE)
IMPLEMENT_FUNCTION_CALLER(NonMemberFunctionCaller, __vectorcall, 0);
IMPLEMENT_FUNCTION_CALLER(MemberFunctionCaller, __vectorcall, 1);
IMPLEMENT_CALLBACK_INVOKER(__vectorcall);
# endif
#elif defined(__clang__)
# define _NOTHING
IMPLEMENT_FUNCTION_CALLER(NonMemberFunctionCaller, _NOTHING, 0);
IMPLEMENT_FUNCTION_CALLER(MemberFunctionCaller, _NOTHING, 1);
IMPLEMENT_CALLBACK_INVOKER(_NOTHING);
# undef _NOTHING
#elif defined(__GNUC__)
# define _NOTHING
IMPLEMENT_FUNCTION_CALLER(NonMemberFunctionCaller, _NOTHING, 0);
IMPLEMENT_FUNCTION_CALLER(MemberFunctionCaller, _NOTHING, 1);
IMPLEMENT_CALLBACK_INVOKER(_NOTHING);
# undef _NOTHING
#else
# define _NOTHING
IMPLEMENT_FUNCTION_CALLER(NonMemberFunctionCaller, _NOTHING, 0);
IMPLEMENT_FUNCTION_CALLER(MemberFunctionCaller, _NOTHING, 1);
IMPLEMENT_CALLBACK_INVOKER(_NOTHING);
# undef _NOTHING
#endif
//========================================================
// member function invoker
//========================================================
template<typename TCLASS, typename TRET, typename ...ARGS>
lua_CFunction MemberFunctionCaller(TRET(TCLASS::*func)(ARGS...))
{
typedef decltype(func) FTYPE; (void)(func);
struct HelperClass
{
static int Invoke(lua_State* state)
{
void * calleePtr = lua_touserdata(state, lua_upvalueindex(1));
luaL_argcheck(state, calleePtr, 1, "cpp closure function not found.");
if (calleePtr)
{
int idx = 0; (void)(idx);
LuaStackReturn<TRET>(state, (LuaStack<TCLASS>::get(state, 1).**(FTYPE*)(calleePtr))(stackOperatorCaller(state, LuaStack<ARGS>::get, sizeof...(ARGS), 1, &idx)...));
return 1;
}
return 0;
}
};
return HelperClass::Invoke;
}
template<typename TCLASS, typename TRET, typename ...ARGS>
lua_CFunction MemberFunctionCaller(TRET(TCLASS::*func)(ARGS...)const)
{
typedef decltype(func) FTYPE; (void)(func);
struct HelperClass
{
static int Invoke(lua_State* state)
{
void * calleePtr = lua_touserdata(state, lua_upvalueindex(1));
luaL_argcheck(state, calleePtr, 1, "cpp closure function not found.");
if (calleePtr)
{
int idx = 0; (void)(idx);
LuaStackReturn<TRET>(state, (LuaStack<TCLASS>::get(state, 1).**(FTYPE*)(calleePtr))(stackOperatorCaller(state, LuaStack<ARGS>::get, sizeof...(ARGS), 1, &idx)...));
return 1;
}
return 0;
}
};
return HelperClass::Invoke;
}
template<typename TCLASS, typename ...ARGS>
lua_CFunction MemberFunctionCaller(void(TCLASS::*func)(ARGS...))
{
typedef decltype(func) FTYPE; (void)(func);
struct HelperClass
{
static int Invoke(lua_State* state)
{
void * calleePtr = lua_touserdata(state, lua_upvalueindex(1));
luaL_argcheck(state, calleePtr, 1, "cpp closure function not found.");
if (calleePtr)
{
int idx = 0; (void)(idx);
(LuaStack<TCLASS>::get(state, 1).**(FTYPE*)(calleePtr))(stackOperatorCaller(state, LuaStack<ARGS>::get, sizeof...(ARGS), 1, &idx)...);
}
return 0;
}
};
return HelperClass::Invoke;
}
template<typename TCLASS, typename ...ARGS>
lua_CFunction MemberFunctionCaller(void(TCLASS::*func)(ARGS...)const)
{
typedef decltype(func) FTYPE; (void)(func);
struct HelperClass
{
static int Invoke(lua_State* state)
{
void * calleePtr = lua_touserdata(state, lua_upvalueindex(1));
luaL_argcheck(state, calleePtr, 1, "cpp closure function not found.");
if (calleePtr)
{
int idx = 0; (void)(idx);
(LuaStack<TCLASS>::get(state, 1).**(FTYPE*)(calleePtr))(stackOperatorCaller(state, LuaStack<ARGS>::get, sizeof...(ARGS), 1, &idx)...);
}
return 0;
}
};
return HelperClass::Invoke;
}
//========================================================
// constructor invoker
//========================================================
template<typename TCLASS, typename ...ARGS>
struct ConstructorCaller
{
static TCLASS * Invoke(lua_State * state)
{
(void)(state);
int idx = 0; (void)(idx);
return new TCLASS(stackOperatorCaller(state, LuaStack<ARGS>::get, sizeof...(ARGS), 0, &idx)...);
}
};
//========================================================
// Destructor invoker
//========================================================
template<typename TCLASS, bool = std::is_destructible<TCLASS>::value>
struct DestructorCaller {
static void Invoke(TCLASS * obj) {
delete obj;
}
};
template<typename TCLASS>
struct DestructorCaller<TCLASS, false> {
static void Invoke(TCLASS * obj) {
}
};
//========================================================
// export class
//========================================================
template <typename TCLASS>
struct LuaClass
{
friend struct DestructorCaller<TCLASS>;
template<typename> friend struct LuaStack;
public:
LuaClass(lua_State * state, const char * name, const luaL_Reg * functions = nullptr)
: m_state(state)
{
assert(state != nullptr);
assert(klassName == nullptr);
#ifndef LUAAA_WITHOUT_CPP_STDLIB
luaL_argcheck(state, (klassName == nullptr), 1, (std::string("C++ class `") + RTTI_CLASS_NAME(TCLASS) + "` bind to conflict lua name `" + name + "`, origin name: " + klassName).c_str());
#else
luaL_argcheck(state, (klassName == nullptr), 1, "C++ class bind to conflict lua class name");
#endif
struct HelperClass {
static int f__clsgc(lua_State* state) {
LuaClass<TCLASS>::klassName = nullptr;
return 0;
}
};
size_t strBufLen = strlen(name) + 1;
klassName = reinterpret_cast<char *>(lua_newuserdata(state, strBufLen));
memcpy(klassName, name, strBufLen);
luaL_newmetatable(state, klassName);
lua_pushvalue(state, -1);
lua_setfield(state, -2, "__index");
luaL_Reg destructor[] = { { "__gc", HelperClass::f__clsgc }, { nullptr, nullptr } };
luaL_setfuncs(state, destructor, 0);
if (functions)
{
luaL_setfuncs(state, functions, 0);
}
lua_pop(state, 1);
}
#ifndef LUAAA_WITHOUT_CPP_STDLIB
LuaClass(lua_State * state, const std::string& name, const luaL_Reg * functions = nullptr)
: LuaClass(state, name.c_str(), functions)
{}
#endif
template<typename ...ARGS>
inline LuaClass<TCLASS>& ctor(const char * name = "new")
{
struct HelperClass {
static int f_gc(lua_State* state) {
TCLASS ** objPtr = (TCLASS**)luaL_checkudata(state, -1, LuaClass<TCLASS>::klassName);
if (objPtr)
{
DestructorCaller<TCLASS>::Invoke(*objPtr);
}
return 0;
}
static int f_new(lua_State* state) {
auto obj = ConstructorCaller<TCLASS, ARGS...>::Invoke(state);
if (obj)
{
TCLASS ** objPtr = (TCLASS**)lua_newuserdata(state, sizeof(TCLASS*));
if (objPtr)
{
*objPtr = obj;
luaL_Reg destructor[] = { { "__gc", HelperClass::f_gc }, { nullptr, nullptr } };
luaL_getmetatable(state, LuaClass<TCLASS>::klassName);
luaL_setfuncs(state, destructor, 0);
lua_setmetatable(state, -2);
return 1;
}
else
{
DestructorCaller<TCLASS>::Invoke(obj);
}
}
lua_pushnil(state);
return 1;
}
};
luaL_Reg constructor[] = { { name, HelperClass::f_new },{ nullptr, nullptr } };
#if USE_NEW_MODULE_REGISTRY
lua_getglobal(m_state, klassName);
if (lua_isnil(m_state, -1))
{
lua_pop(m_state, 1);
lua_newtable(m_state);
}
luaL_setfuncs(m_state, constructor, 0);
lua_setglobal(m_state, klassName);
#else
luaL_openlib(m_state, klassName, constructor, 0);
#endif
return (*this);
}
template<typename ...ARGS>
inline LuaClass<TCLASS>& ctor(const char * name, TCLASS*(*spawner)(ARGS...)) {
typedef decltype(spawner) SPAWNERFTYPE;
struct HelperClass {
static int f_gc(lua_State* state) {
TCLASS ** objPtr = (TCLASS**)luaL_checkudata(state, -1, LuaClass<TCLASS>::klassName);
if (objPtr)
{
DestructorCaller<TCLASS>::Invoke(*objPtr);
}
return 0;
}
static int f_new(lua_State* state) {
void * spawner = lua_touserdata(state, lua_upvalueindex(1));
luaL_argcheck(state, spawner, 1, "cpp closure spawner not found.");
if (spawner) {
int idx = 0; (void)(idx);
auto obj = (*(SPAWNERFTYPE*)(spawner))(stackOperatorCaller(state, LuaStack<ARGS>::get, sizeof...(ARGS), 0, &idx)...);
if (obj)
{
TCLASS ** objPtr = (TCLASS**)lua_newuserdata(state, sizeof(TCLASS*));
if (objPtr)
{
*objPtr = obj;
luaL_Reg destructor[] = { { "__gc", HelperClass::f_gc }, { nullptr, nullptr } };
luaL_getmetatable(state, LuaClass<TCLASS>::klassName);
luaL_setfuncs(state, destructor, 0);
lua_setmetatable(state, -2);
return 1;
}
else
{
DestructorCaller<TCLASS>::Invoke(obj);
}
}
}
lua_pushnil(state);
return 1;
}
};
luaL_Reg constructor[] = { { name, HelperClass::f_new },{ nullptr, nullptr } };
#if USE_NEW_MODULE_REGISTRY
lua_getglobal(m_state, klassName);
if (lua_isnil(m_state, -1))
{
lua_pop(m_state, 1);
lua_newtable(m_state);
}
#endif
SPAWNERFTYPE * spawnerPtr = (SPAWNERFTYPE*)lua_newuserdata(m_state, sizeof(SPAWNERFTYPE));
# ifndef LUAAA_WITHOUT_CPP_STDLIB
luaL_argcheck(m_state, spawnerPtr != nullptr, 1, (std::string("faild to alloc mem to store spawner for ctor `") + name + "`").c_str());
# else
luaL_argcheck(m_state, spawnerPtr != nullptr, 1, "faild to alloc mem to store spawner for ctor");
# endif
*spawnerPtr = spawner;
#if USE_NEW_MODULE_REGISTRY
luaL_setfuncs(m_state, constructor, 1);
lua_setglobal(m_state, klassName);
#else
luaL_openlib(m_state, klassName, constructor, 1);
#endif
return (*this);
}
template<typename TRET, typename ...ARGS>
inline LuaClass<TCLASS>& ctor(const char * name, TCLASS*(*spawner)(ARGS...), TRET(*deleter)(TCLASS*)){
typedef decltype(spawner) SPAWNERFTYPE;
typedef decltype(deleter) DELETERFTYPE;
struct HelperClass {
static int f_gc(lua_State* state) {
void * deleter = lua_touserdata(state, lua_upvalueindex(1));
luaL_argcheck(state, deleter, 1, "cpp closure deleter not found.");
if (deleter) {
TCLASS ** objPtr = (TCLASS**)luaL_checkudata(state, -1, LuaClass<TCLASS>::klassName);
if (objPtr)
{
(*(DELETERFTYPE*)(deleter))(*objPtr);
}
}
return 0;
}
static int f_new(lua_State* state) {
void * spawner = lua_touserdata(state, lua_upvalueindex(1));
luaL_argcheck(state, spawner, 1, "cpp closure spawner not found.");
void * deleter = lua_touserdata(state, lua_upvalueindex(2));
luaL_argcheck(state, deleter, 1, "cpp closure deleter not found.");
if (spawner) {
int idx = 0; (void)(idx);
auto obj = (*(SPAWNERFTYPE*)(spawner))(stackOperatorCaller(state, LuaStack<ARGS>::get, sizeof...(ARGS), 0, &idx)...);
if (obj)
{
TCLASS ** objPtr = (TCLASS**)lua_newuserdata(state, sizeof(TCLASS*));
if (objPtr)
{
*objPtr = obj;
luaL_Reg destructor[] = {
{ "__gc", HelperClass::f_gc },
{ nullptr, nullptr }
};
luaL_getmetatable(state, LuaClass<TCLASS>::klassName);
DELETERFTYPE * deleterPtr = (DELETERFTYPE*)lua_newuserdata(state, sizeof(DELETERFTYPE));
# ifndef LUAAA_WITHOUT_CPP_STDLIB
luaL_argcheck(state, deleterPtr != nullptr, 1, (std::string("faild to alloc mem to store deleter for ctor meta table `") + LuaClass<TCLASS>::klassName + "`").c_str());
# else
luaL_argcheck(state, deleterPtr != nullptr, 1, "faild to alloc mem to store deleter for ctor meta table");
# endif
*deleterPtr = *(DELETERFTYPE*)(deleter);
luaL_setfuncs(state, destructor, 1);
lua_setmetatable(state, -2);
return 1;
}
else
{
DestructorCaller<TCLASS>::Invoke(obj);
}
}
}
lua_pushnil(state);
return 1;
}
};
luaL_Reg constructor[] = { { name, HelperClass::f_new },{ nullptr, nullptr } };
#if USE_NEW_MODULE_REGISTRY
lua_getglobal(m_state, klassName);
if (lua_isnil(m_state, -1))
{
lua_pop(m_state, 1);
lua_newtable(m_state);
}
#endif
SPAWNERFTYPE * spawnerPtr = (SPAWNERFTYPE*)lua_newuserdata(m_state, sizeof(SPAWNERFTYPE));
# ifndef LUAAA_WITHOUT_CPP_STDLIB
luaL_argcheck(m_state, spawnerPtr != nullptr, 1, (std::string("faild to alloc mem to store spawner for ctor `") + name + "`").c_str());
# else
luaL_argcheck(m_state, spawnerPtr != nullptr, 1, ("faild to alloc mem to store spawner for ctor"));
# endif
*spawnerPtr = spawner;
DELETERFTYPE * deleterPtr = (DELETERFTYPE*)lua_newuserdata(m_state, sizeof(DELETERFTYPE));
# ifndef LUAAA_WITHOUT_CPP_STDLIB
luaL_argcheck(m_state, deleterPtr != nullptr, 1, (std::string("faild to alloc mem to store deleter for ctor `") + name + "`").c_str());
# else
luaL_argcheck(m_state, spawnerPtr != nullptr, 1, ("faild to alloc mem to store deleter for ctor"));
# endif
*deleterPtr = deleter;
#if USE_NEW_MODULE_REGISTRY
luaL_setfuncs(m_state, constructor, 2);
lua_setglobal(m_state, klassName);
#else
luaL_openlib(m_state, klassName, constructor, 2);
#endif
return (*this);
}
template<typename ...ARGS>
inline LuaClass<TCLASS>& ctor(const char * name, TCLASS*(*spawner)(ARGS...), std::nullptr_t) {
typedef decltype(spawner) SPAWNERFTYPE;
struct HelperClass {
static int f_nogc(lua_State* state) {
return 0;
}
static int f_new(lua_State* state) {
void * spawner = lua_touserdata(state, lua_upvalueindex(1));
luaL_argcheck(state, spawner, 1, "cpp closure spawner not found.");
if (spawner) {
int idx = 0; (void)(idx);
auto obj = (*(SPAWNERFTYPE*)(spawner))(stackOperatorCaller(state, LuaStack<ARGS>::get, sizeof...(ARGS), 0, &idx)...);
if (obj)
{
TCLASS ** objPtr = (TCLASS**)lua_newuserdata(state, sizeof(TCLASS*));
if (objPtr)
{
*objPtr = obj;
luaL_Reg destructor[] = {
{ "__gc", HelperClass::f_nogc },
{ nullptr, nullptr }
};
luaL_getmetatable(state, LuaClass<TCLASS>::klassName);
luaL_setfuncs(state, destructor, 0);
lua_setmetatable(state, -2);
return 1;
}
else
{
DestructorCaller<TCLASS>::Invoke(obj);
}
}
}
lua_pushnil(state);
return 1;
}
};
luaL_Reg constructor[] = { { name, HelperClass::f_new },{ nullptr, nullptr } };
#if USE_NEW_MODULE_REGISTRY
lua_getglobal(m_state, klassName);
if (lua_isnil(m_state, -1))
{
lua_pop(m_state, 1);
lua_newtable(m_state);
}
#endif
SPAWNERFTYPE * spawnerPtr = (SPAWNERFTYPE*)lua_newuserdata(m_state, sizeof(SPAWNERFTYPE));
#ifndef LUAAA_WITHOUT_CPP_STDLIB
luaL_argcheck(m_state, spawnerPtr != nullptr, 1, (std::string("faild to alloc mem to store spawner for ctor `") + name + "`").c_str());
#else