Unlua静态导出

在Unlua中可使用以下宏来静态导出反射体系外的类、成员函数、成员变量、全局函数和枚举

/**
 * Export a class
 */
#define EXPORT_UNTYPED_CLASS(Name, bIsReflected, Lib) \
    struct FExported##Name##Helper \
    { \
        static FExported##Name##Helper StaticInstance; \
        FExported##Name##Helper() \
            : ExportedClass(nullptr) \
        { \
            UnLua::IExportedClass *Class = UnLua::FindExportedClass(#Name); \
            if (!Class) \
            { \
                ExportedClass = new UnLua::TExportedClassBase<bIsReflected>(#Name); \
                UnLua::ExportClass(ExportedClass); \
                Class = ExportedClass; \
            } \
            Class->AddLib(Lib); \
        } \
        ~FExported##Name##Helper() \
        { \
            delete ExportedClass; \
        } \
        UnLua::IExportedClass *ExportedClass; \
    };

#define BEGIN_EXPORT_CLASS(Type, ...) \
    BEGIN_EXPORT_NAMED_CLASS(Type, Type, ##__VA_ARGS__)

#define BEGIN_EXPORT_NAMED_CLASS(Name, Type, ...) \
    DEFINE_NAMED_TYPE(#Name, Type) \
    BEGIN_EXPORT_CLASS_EX(false, Name, , Type, nullptr, ##__VA_ARGS__)

#define BEGIN_EXPORT_REFLECTED_CLASS(Type, ...) \
    BEGIN_EXPORT_CLASS_EX(true, Type, , Type, nullptr, ##__VA_ARGS__)

#define BEGIN_EXPORT_CLASS_WITH_SUPER(Type, SuperType, ...) \
    BEGIN_EXPORT_NAMED_CLASS_WITH_SUPER_NAME(Type, Type, #SuperType, ##__VA_ARGS__)

#define BEGIN_EXPORT_NAMED_CLASS_WITH_SUPER_NAME(TypeName, Type, SuperTypeName, ...) \
    DEFINE_NAMED_TYPE(#TypeName, Type) \
    BEGIN_EXPORT_CLASS_EX(false, TypeName, , Type, SuperTypeName, ##__VA_ARGS__)

#define BEGIN_EXPORT_CLASS_EX(bIsReflected, Name, Suffix, Type, SuperTypeName, ...) \
    struct FExported##Name##Suffix##Helper \
    { \
        typedef Type ClassType; \
        static FExported##Name##Suffix##Helper StaticInstance; \
        UnLua::TExportedClass<bIsReflected, Type, ##__VA_ARGS__> *ExportedClass; \
        ~FExported##Name##Suffix##Helper() \
        { \
            delete ExportedClass; \
        } \
        FExported##Name##Suffix##Helper() \
            : ExportedClass(nullptr) \
        { \
            UnLua::TExportedClass<bIsReflected, Type, ##__VA_ARGS__> *Class = (UnLua::TExportedClass<bIsReflected, Type, ##__VA_ARGS__>*)UnLua::FindExportedClass(#Name); \
            if (!Class) \
            { \
                ExportedClass = new UnLua::TExportedClass<bIsReflected, Type, ##__VA_ARGS__>(#Name, SuperTypeName); \
                UnLua::ExportClass((UnLua::IExportedClass*)ExportedClass); \
                Class = ExportedClass; \
            }

#define ADD_PROPERTY(Property) \
            Class->AddProperty(#Property, &ClassType::Property);

#define ADD_BITFIELD_BOOL_PROPERTY(Property) \
            { \
                uint8 Buffer[sizeof(ClassType)] = {0}; \
                ((ClassType*)Buffer)->Property = 1; \
                bool bSuccess = Class->AddBitFieldBoolProperty(#Property, Buffer); \
                check(bSuccess); \
            }

#define ADD_FUNCTION(Function) \
            Class->AddFunction(#Function, &ClassType::Function);

#define ADD_NAMED_FUNCTION(Name, Function) \
            Class->AddFunction(Name, &ClassType::Function);

#define ADD_FUNCTION_EX(Name, RetType, Function, ...) \
            Class->AddFunction<RetType, ##__VA_ARGS__>(Name, (RetType(ClassType::*)(__VA_ARGS__))(&ClassType::Function));

#define ADD_CONST_FUNCTION_EX(Name, RetType, Function, ...) \
            Class->AddFunction<RetType, ##__VA_ARGS__>(Name, (RetType(ClassType::*)(__VA_ARGS__) const)(&ClassType::Function));

#define ADD_STATIC_FUNCTION(Function) \
            Class->AddStaticFunction(#Function, &ClassType::Function);

#define ADD_STATIC_FUNCTION_EX(Name, RetType, Function, ...) \
            Class->AddStaticFunction<RetType, ##__VA_ARGS__>(Name, &ClassType::Function);

#define ADD_EXTERNAL_FUNCTION(RetType, Function, ...) \
            Class->AddStaticFunction<RetType, ##__VA_ARGS__>(#Function, Function);

#define ADD_EXTERNAL_FUNCTION_EX(Name, RetType, Function, ...) \
            Class->AddStaticFunction<RetType, ##__VA_ARGS__>(Name, Function);

#define ADD_STATIC_CFUNTION(Function) \
            Class->AddStaticCFunction(#Function, &ClassType::Function);

#define ADD_NAMED_STATIC_CFUNTION(Name, Function) \
            Class->AddStaticCFunction(Name, &ClassType::Function);

#define ADD_LIB(Lib) \
            Class->AddLib(Lib);

#define ADD_SHARED_PTR_CONSTRUCTOR(Mode, ...) \
            Class->AddSharedPtrConstructor<Mode, ##__VA_ARGS__>();

#define ADD_SHARED_REF_CONSTRUCTOR(Mode, ...) \
            Class->AddSharedRefConstructor<Mode, ##__VA_ARGS__>();

#define END_EXPORT_CLASS(...) \
        } \
    };

#define IMPLEMENT_EXPORTED_CLASS(Name) \
    FExported##Name##Helper FExported##Name##Helper::StaticInstance;

#define IMPLEMENT_EXPORTED_CLASS_EX(Name, Suffix) \
    FExported##Name##Suffix##Helper FExported##Name##Suffix##Helper::StaticInstance;

/**
 * Export a global function
 */
#define EXPORT_FUNCTION(RetType, Function, ...) \
    static struct FExportedFunc##Function : public UnLua::TExportedFunction<RetType, ##__VA_ARGS__> \
    { \
        FExportedFunc##Function(const FString &InName, RetType(*InFunc)(__VA_ARGS__)) \
            : UnLua::TExportedFunction<RetType, ##__VA_ARGS__>(InName, InFunc) \
        { \
            UnLua::ExportFunction(this); \
        } \
    } Exported##Function(#Function, Function);

#define EXPORT_FUNCTION_EX(Name, RetType, Function, ...) \
    static struct FExportedFunc##Name : public UnLua::TExportedFunction<RetType, ##__VA_ARGS__> \
    { \
        FExportedFunc##Name(const FString &InName, RetType(*InFunc)(__VA_ARGS__)) \
            : UnLua::TExportedFunction<RetType, ##__VA_ARGS__>(InName, InFunc) \
        { \
            UnLua::ExportFunction(this); \
        } \
    } Exported##Name(#Name, Function);

/**
 * Export an enum
 */
#define BEGIN_EXPORT_ENUM(Enum) \
    DEFINE_NAMED_TYPE(#Enum, Enum) \
    static struct FExported##Enum : public UnLua::FExportedEnum \
    { \
        typedef Enum EnumType; \
        FExported##Enum(const FString &InName) \
            : UnLua::FExportedEnum(InName) \
        { \
            UnLua::ExportEnum(this);

#define ADD_ENUM_VALUE(Value) \
            NameValues.Add(#Value, Value);

#define ADD_SCOPED_ENUM_VALUE(Value) \
            NameValues.Add(#Value, (int32)EnumType::Value);

#define END_EXPORT_ENUM(Enum) \
        } \
    } Exported##Enum(#Enum);

 

1. 宏BEGIN_EXPORT_REFLECTED_CLASS， END_EXPORT_CLASS放在任意.h/.cpp都行，需要include "UnLuaEx.h"

   宏IMPLEMENT_EXPORTED_CLASS需要放在.cpp里。

2. 导出的函数参数、成员变量的类型必须为ue4反射支持的类型或者已被unlua静态导出过的类型

3. 模板函数要针对每一种类型，显式指定一个新名字函数名字，然后静态导出。

 

静态导出UnScoped enumeration（enum）

UnScoped枚举c++定义和导出

#include "UnLuaEx.h"

// c++定义
typedef enum
{
    SGSOUND_SFX = 0,
    SGSOUND_UI,
    SGSOUND_Max,
}ESGSoundType;

// 静态导出
BEGIN_EXPORT_ENUM(ESGSoundType)
    ADD_ENUM_VALUE(SGSOUND_SFX)
    ADD_ENUM_VALUE(SGSOUND_UI)
END_EXPORT_ENUM(ESGSoundType)

/* 静态导出  展开
template <>
struct UnLua::TType<ESGSoundType, false>
{
    static const char* GetName() { return "ESGSoundType"; }
};

static struct FExportedESGSoundType : public UnLua::FExportedEnum
{
    typedef ESGSoundType EnumType;

    FExportedESGSoundType(const FString& InName) : UnLua::FExportedEnum(InName)
    {
        UnLua::ExportEnum(this);
        NameValues.Add("SGSOUND_SFX", SGSOUND_SFX);
        NameValues.Add("SGSOUND_UI", SGSOUND_UI);
    }
} ExportedESGSoundType("ESGSoundType"); */

导出的lua定义

---@class ESGSoundType
---@field public SGSOUND_SFX integer
---@field public SGSOUND_UI integer
local ESGSoundType = {}

 

静态导出Scoped enumeration（enum class）

Scoped枚举c++定义和导出

#include "UnLuaEx.h"

// c++定义
enum class ESWeaponType
{
    SWEAPON_MAIN = 0,
    SWEAPON_PISTOL,
    SWEAPON_MELEE,
    SWEAPON_Max,
};

// 静态导出
BEGIN_EXPORT_ENUM(ESWeaponType)
    ADD_SCOPED_ENUM_VALUE(SWEAPON_MAIN)
    ADD_SCOPED_ENUM_VALUE(SWEAPON_PISTOL)
    ADD_SCOPED_ENUM_VALUE(SWEAPON_MELEE)
END_EXPORT_ENUM(ESWeaponType)

/* 静态导出  展开
template <>
struct UnLua::TType<ESWeaponType, false>
{
    static const char* GetName() { return "ESWeaponType"; }
};

static struct FExportedESWeaponType : public UnLua::FExportedEnum
{
    typedef ESWeaponType EnumType;

    FExportedESWeaponType(const FString& InName) : UnLua::FExportedEnum(InName)
    {
        UnLua::ExportEnum(this);
        NameValues.Add("SWEAPON_MAIN", (int32)EnumType::SWEAPON_MAIN);
        NameValues.Add("SWEAPON_PISTOL", (int32)EnumType::SWEAPON_PISTOL);
        NameValues.Add("SWEAPON_MELEE", (int32)EnumType::SWEAPON_MELEE);
    }
} ExportedESWeaponType("ESWeaponType"); */

导出的lua定义

---@class ESWeaponType
---@field public SWEAPON_MAIN integer
---@field public SWEAPON_PISTOL integer
---@field public SWEAPON_MELEE integer
local ESWeaponType = {}

 

导出c++静态全局函数

c++定义和导出

#include "UnLuaEx.h"

// c++定义
UUserWidget* CreateWidgetOwnedByPlayerController(APlayerController* OwningPlayerController, TSubclassOf<UUserWidget> UserWidgetClass = UUserWidget::StaticClass(), FName WidgetName = NAME_None)
{
    return nullptr;
}

void ListenForInputActionEx(UUserWidget* Widget, FName ActionName, int32 EventType)
{
    
}

EXPORT_FUNCTION(UUserWidget*, CreateWidgetOwnedByPlayerController, APlayerController*, TSubclassOf<UUserWidget>, FName)
EXPORT_FUNCTION(void, ListenForInputActionEx, UUserWidget*, FName, int32)

/* 静态导出  展开
static struct FExportedFuncCreateWidgetOwnedByPlayerController : public UnLua::TExportedFunction<
        UUserWidget*, APlayerController*, TSubclassOf<UUserWidget>, FName>
{
    FExportedFuncCreateWidgetOwnedByPlayerController(const FString& InName,
                                                     UUserWidget*(*InFunc)(
                                                         APlayerController*, TSubclassOf<UUserWidget>, FName)) :
        UnLua::TExportedFunction<UUserWidget*, APlayerController*, TSubclassOf<UUserWidget>, FName>(InName, InFunc)
    {
        UnLua::ExportFunction(this);
    }
} ExportedCreateWidgetOwnedByPlayerController("CreateWidgetOwnedByPlayerController",
                                              CreateWidgetOwnedByPlayerController);
static struct FExportedFuncListenForInputActionEx : public UnLua::TExportedFunction<void, UUserWidget*, FName, int32>
{
    FExportedFuncListenForInputActionEx(const FString& InName, void (*InFunc)(UUserWidget*, FName, int32)) :
        UnLua::TExportedFunction<void, UUserWidget*, FName, int32>(InName, InFunc) { UnLua::ExportFunction(this); }
} ExportedListenForInputActionEx("ListenForInputActionEx", ListenForInputActionEx); */

导出的lua定义

---@param P0 APlayerController 
---@param P1 TSubclassOf<UUserWidget> 
---@param P2 string 
---@return UUserWidget
function _G.CreateWidgetOwnedByPlayerController(P0, P1, P2) end

---@param P0 UUserWidget 
---@param P1 string 
---@param P2 integer 
function _G.ListenForInputActionEx(P0, P1, P2) end

 

导出普通c++类的函数

c++定义和导出    注：如果有父类，需使用BEGIN_EXPORT_CLASS_WITH_SUPER(ClassType, SuperClassType)宏

#include "UnLuaEx.h"

// c++定义
class LuaToolSet
{
public:
    static bool BatteryIsCharging() { return true; }
    static float GetBatteryLevel() {return 1;}
    static void ForceGarbageCollection(){}
    static FString FMD5HashAnsiString(const FString& str) { return TEXT(""); }
    static void GetProperyByClass(UObject* umg, TArray<UUserWidget*>& FoundWidgets, TSubclassOf<UUserWidget> WidgetClass){}
    static TArray<int64> GetTArrayInt64() 
    {
        TArray<int64> Arr; 
        Arr.Add(10);
        return Arr;
    }
    static int32 NativeGetWorldType(UWorld* World, bool IsClient) { return 0; }
};

BEGIN_EXPORT_CLASS(LuaToolSet)
    ADD_FUNCTION(PlayMusic)
    ADD_FUNCTION(StopMusic)
    ADD_FUNCTION_EX("SetMusicVolume", bool, NativeSetMusicVolume, int, float)
    ADD_STATIC_FUNCTION(BatteryIsCharging)
    ADD_STATIC_FUNCTION(GetBatteryLevel)
    ADD_STATIC_FUNCTION(ForceGarbageCollection)
    ADD_STATIC_FUNCTION(FMD5HashAnsiString)
    ADD_STATIC_FUNCTION(GetProperyByClass)
    ADD_STATIC_FUNCTION(GetTArrayInt64)
    ADD_STATIC_FUNCTION_EX("GetWorldType", int32, NativeGetWorldType, UWorld*, bool)
END_EXPORT_CLASS(LuaToolSet)
IMPLEMENT_EXPORTED_CLASS(LuaToolSet)

/* 静态导出  展开
template <>
struct UnLua::TType<LuaToolSet, false>
{
    static const char* GetName() { return "LuaToolSet"; }
};

struct FExportedLuaToolSetHelper
{
    typedef LuaToolSet ClassType;
    static FExportedLuaToolSetHelper StaticInstance;
    UnLua::TExportedClass<false, LuaToolSet>* ExportedClass;
    ~FExportedLuaToolSetHelper() { delete ExportedClass; }

    FExportedLuaToolSetHelper() : ExportedClass(nullptr)
    {
        UnLua::TExportedClass<false, LuaToolSet>* Class = (UnLua::TExportedClass<false, LuaToolSet>*)
            UnLua::FindExportedClass("LuaToolSet");
        if (!Class)
        {
            ExportedClass = new UnLua::TExportedClass<false, LuaToolSet>("LuaToolSet", nullptr);
            UnLua::ExportClass((UnLua::IExportedClass*)ExportedClass);
            Class = ExportedClass;
        }
        Class->AddFunction("PlayMusic", &ClassType::PlayMusic);
        Class->AddFunction("StopMusic", &ClassType::StopMusic);
        Class->AddFunction<bool,int, float>("SetMusicVolume", (bool(ClassType::*)(int, float))(&ClassType::NativeSetMusicVolume));
        Class->AddStaticFunction("BatteryIsCharging", &ClassType::BatteryIsCharging);
        Class->AddStaticFunction("GetBatteryLevel", &ClassType::GetBatteryLevel);
        Class->AddStaticFunction("ForceGarbageCollection", &ClassType::ForceGarbageCollection);
        Class->AddStaticFunction("FMD5HashAnsiString", &ClassType::FMD5HashAnsiString);
        Class->AddStaticFunction("GetProperyByClass", &ClassType::GetProperyByClass);
        Class->AddStaticFunction("GetTArrayInt64", &ClassType::GetTArrayInt64);
        Class->AddStaticFunction<int32,UWorld*, bool>("GetWorldType", &ClassType::NativeGetWorldType);
} };
FExportedLuaToolSetHelper FExportedLuaToolSetHelper::StaticInstance; */

导出的lua定义

---@param P0 string 
function LuaToolSet:PlayMusic(P0) end

function LuaToolSet:StopMusic() end

---@param P0 integer 
---@param P1 number 
---@return boolean
function LuaToolSet:SetMusicVolume(P0, P1) end

---@return boolean
function LuaToolSet.BatteryIsCharging() end

---@return number
function LuaToolSet.GetBatteryLevel() end

function LuaToolSet.ForceGarbageCollection() end

---@param P0 string 
---@return string
function LuaToolSet.FMD5HashAnsiString(P0) end

---@param P0 UObject 
---@param P1 TArray<UUserWidget> @[out]
---@param P2 TSubclassOf<UUserWidget> 
function LuaToolSet.GetProperyByClass(P0, P1, P2) end

---@return TArray<integer>
function LuaToolSet.GetTArrayInt64() end

---@param P0 UWorld 
---@param P1 boolean 
---@return integer
function LuaToolSet.GetWorldType(P0, P1) end

 

导出ue4引擎反射类的属性和函数

c++导出

#include "UnLuaEx.h"

// c++定义
BEGIN_EXPORT_REFLECTED_CLASS(UEngine)
    // bool bIsInitialized;
    ADD_PROPERTY(bIsInitialized)
    // const FLinearColor& GetSelectedMaterialColor() const
    ADD_FUNCTION(GetSelectedMaterialColor)
    // void AddOnScreenDebugMessage(uint64 Key, float TimeToDisplay, FColor DisplayColor, const FString& DebugMessage, bool bNewerOnTop, const FVector2D& TextScale);
    ADD_FUNCTION_EX("AddDebugMessage", void, AddOnScreenDebugMessage, uint64, float, FColor, const FString&, bool, const FVector2D&)
    // static class UFont* GetSubtitleFont();
    ADD_STATIC_FUNCTION(GetSubtitleFont)
END_EXPORT_CLASS()
IMPLEMENT_EXPORTED_CLASS(UEngine)

/* 静态导出  展开
struct FExportedUEngineHelper
{
    typedef UEngine ClassType;
    static FExportedUEngineHelper StaticInstance;
    UnLua::TExportedClass<true, UEngine>* ExportedClass;
    ~FExportedUEngineHelper() { delete ExportedClass; }

    FExportedUEngineHelper() : ExportedClass(nullptr)
    {
        UnLua::TExportedClass<true, UEngine>* Class = (UnLua::TExportedClass<true, UEngine>*)
            UnLua::FindExportedClass("UEngine");
        if (!Class)
        {
            ExportedClass = new UnLua::TExportedClass<true, UEngine>("UEngine", nullptr);
            UnLua::ExportClass((UnLua::IExportedClass*)ExportedClass);
            Class = ExportedClass;
        }
        Class->AddProperty("bIsInitialized", &ClassType::bIsInitialized);
        Class->AddFunction("GetSelectedMaterialColor", &ClassType::GetSelectedMaterialColor);
        Class->AddFunction<void, uint64, float, FColor, const FString&, bool, const FVector2D&>(
            "AddDebugMessage",
            (void(ClassType::*)(uint64, float, FColor, const FString&, bool, const FVector2D&))(&
                ClassType::AddOnScreenDebugMessage));
        Class->AddStaticFunction("GetSubtitleFont", &ClassType::GetSubtitleFont);
} };
FExportedUEngineHelper FExportedUEngineHelper::StaticInstance;*/

导出的lua定义

// lua定义：
---@type boolean 
UEngine.bIsInitialized = nil

---@return FLinearColor
function UEngine:GetSelectedMaterialColor() end

---@param P0 integer 
---@param P1 number 
---@param P2 FColor 
---@param P3 string 
---@param P4 boolean 
---@param P5 FVector2D 
function UEngine:AddDebugMessage(P0, P1, P2, P3, P4, P5) end

---@return UFont
function UEngine.GetSubtitleFont() end

 

通过AddLib方式导出反射类函数

c++导出

// c++定义
#include "UnLuaEx.h"

static const luaL_Reg UClassLib[] =
{
    { "Load", UClass_Load },
    { "Find", UClass_Find },
    { "IsChildOf", UClass_IsChildOf },
    { nullptr, nullptr }
};

BEGIN_EXPORT_REFLECTED_CLASS(UClass)
    ADD_LIB(UClassLib)
END_EXPORT_CLASS()
IMPLEMENT_EXPORTED_CLASS(UClass)

/* 静态导出  展开
struct FExportedUClassHelper
{
    typedef UClass ClassType;
    static FExportedUClassHelper StaticInstance;
    UnLua::TExportedClass<true, UClass>* ExportedClass;
    ~FExportedUClassHelper() { delete ExportedClass; }

    FExportedUClassHelper() : ExportedClass(nullptr)
    {
        UnLua::TExportedClass<true, UClass>* Class = (UnLua::TExportedClass<true, UClass>*)
            UnLua::FindExportedClass("UClass");
        if (!Class)
        {
            ExportedClass = new UnLua::TExportedClass<true, UClass>("UClass", nullptr);
            UnLua::ExportClass((UnLua::IExportedClass*)ExportedClass);
            Class = ExportedClass;
        }
        Class->AddLib(UClassLib);
} };
FExportedUClassHelper FExportedUClassHelper::StaticInstance;*/

导出的lua定义（IntelliSense不能识别AddLib方式，下面是自己加的）

// lua定义：
---@param P0 string 
---@return UClass
function UClass.Load(P0) end

---@param P0 string 
---@return UClass
function UClass.Find(P0) end

---@param P0 UObject 
---@param P1 UObject 
---@return bool
function UClass.IsChildOf(P0, P1) end

 

导出自定义反射类的属性和函数

c++导出

// c++定义
#include "UnLuaEx.h"

UCLASS()
class MYGAME_API UMFPWObject : public UObject
{
    GENERATED_BODY()

public:
    int32 ObjectIndex;
    FString ObjectPath;
    uint8 bIsNative : 1;

    static int32 GetGlobalIndex() { return 100; }
    FString GetObjectPath() { return TEXT(""); }
    FString GetObjectHash() const { return TEXT(""); }
    FString QueryObject(int32 Index) { return TEXT(""); }
    bool operator==(const UMFPWObject& other) const { return true; }
};

BEGIN_EXPORT_REFLECTED_CLASS(UMFPWObject)
    ADD_STATIC_FUNCTION(GetGlobalIndex)
    ADD_PROPERTY(ObjectIndex)
    ADD_PROPERTY(ObjectPath)
    ADD_BITFIELD_BOOL_PROPERTY(bIsNative)
    ADD_FUNCTION(GetObjectPath)
    ADD_CONST_FUNCTION_EX("GetObjectHashInLua", FString, GetObjectHash)
    ADD_FUNCTION_EX("QueryObjectInLua", FString, QueryObject, int32)
    ADD_NAMED_FUNCTION("Equals", operator==)
END_EXPORT_CLASS()
IMPLEMENT_EXPORTED_CLASS(UMFPWObject)

/* 静态导出  展开
struct FExportedUMFPWObjectHelper
{
    typedef UMFPWObject ClassType;
    static FExportedUMFPWObjectHelper StaticInstance;
    UnLua::TExportedClass<true, UMFPWObject>* ExportedClass;
    ~FExportedUMFPWObjectHelper() { delete ExportedClass; }

    FExportedUMFPWObjectHelper() : ExportedClass(nullptr)
    {
        UnLua::TExportedClass<true, UMFPWObject>* Class = (UnLua::TExportedClass<true, UMFPWObject>*)
            UnLua::FindExportedClass("UMFPWObject");
        if (!Class)
        {
            ExportedClass = new UnLua::TExportedClass<true, UMFPWObject>("UMFPWObject", nullptr);
            UnLua::ExportClass((UnLua::IExportedClass*)ExportedClass);
            Class = ExportedClass;
        }
    　　Class->AddStaticFunction("GetGlobalIndex", &ClassType::GetGlobalIndex);
    　　Class->AddProperty("ObjectIndex", &ClassType::ObjectIndex);
    　　Class->AddProperty("ObjectPath", &ClassType::ObjectPath);
    　　{
        　　uint8 Buffer[sizeof(ClassType)] = {0};
        　　((ClassType*)Buffer)->bIsNative = 1;
        　　bool bSuccess = Class->AddBitFieldBoolProperty("bIsNative", Buffer);
        　　{
            　　if ((!(bSuccess)))
            　　{
                　　struct Impl
                　　{
                    　　static void __declspec(noinline) __declspec(code_seg(".uedbg")) ExecCheckImplInternal()
                    　　{
                        　　FDebug::CheckVerifyFailed("bSuccess", "MFPWObject.cpp", 30, L"");
                    　　}
                　　};
                　　Impl::ExecCheckImplInternal();
                　　(__nop(), __debugbreak());;
            　　}
        　　};
    　　}
    　　Class->AddFunction("GetObjectPath", &ClassType::GetObjectPath);
        Class->AddFunction<FString>("GetObjectHashInLua", (FString(ClassType::*)() const)(&ClassType::GetObjectHash));
        Class->AddFunction<FString,int32>("QueryObjectInLua", (FString(ClassType::*)(int32))(&ClassType::QueryObject));
        Class->AddFunction("Equals", &ClassType::operator==);
} };
FExportedUMFPWObjectHelper FExportedUMFPWObjectHelper::StaticInstance;*/

导出的lua定义

-- lua定义：
---@type integer 
UMFPWObject.ObjectIndex = nil

---@type string 
UMFPWObject.ObjectPath = nil

---@type boolean 
UMFPWObject.bIsNative = nil

---@return integer
function UMFPWObject.GetGlobalIndex() end

---@return string
function UMFPWObject:GetObjectPath() end

---@return string
function UMFPWObject:GetObjectHashInLua() end

---@param P0 integer 
---@return string
function UMFPWObject:QueryObjectInLua(P0) end

---@param P0 UMFPWObject 
---@return boolean
function UMFPWObject:Equals(P0) end

 

导出避免符号冲突

在多个文件里对同一个类进行了静态导出回造成符号冲突，可以使用BEGIN_EXPORT_CLASS_EX宏

// file1.cpp
BEGIN_EXPORT_CLASS_EX(true, UWorld, file1, UWorld, "UObject") //没有基类时，最后一个参数可以填nullptr
ADD_FUNCTION(GetDefaultGravityZ)
END_EXPORT_CLASS()
IMPLEMENT_EXPORTED_CLASS_EX(UWorld, file1)

// file2.cpp
BEGIN_EXPORT_CLASS_EX(true, UWorld, file2, UWorld, "UObject") //没有基类时，最后一个参数可以填nullptr
ADD_FUNCTION(GetMapName)
END_EXPORT_CLASS()
IMPLEMENT_EXPORTED_CLASS_EX(UWorld, file2)