142 lines
4.0 KiB
C++
142 lines
4.0 KiB
C++
#pragma once
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#include "uclass.h"
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namespace refl {
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template<_ReflCheck_Ctor T>
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class UClass_Auto : public UClass {
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public:
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using UClass::UClass;
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using MyUClass = UClass_Auto<T>;
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public:
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constexpr static MyUClass BuildClass() {
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MyUClass cls(type_name<T>().View(), sizeof(T));
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if constexpr (!std::is_trivially_copyable_v<T>) {
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cls.vtable.InitObject = &MyUClass::InitObject<T>;
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cls.vtable.CopyObject = &MyUClass::CopyObject<T>;
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}
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return cls;
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}
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};
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/*
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* 模板优化
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* 成员参数转化为const void*
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* 引用参数转化为指针
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* 返回引用转化为指针
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*/
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template<typename R, typename... Args>
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class UMethod_Auto : public UClass {
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using UClass::UClass;
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using MethodType = R(*)(Args...);
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using MyUClass = UMethod_Auto<R, Args...>;
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public:
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std::array<const UClass*, sizeof...(Args) + 1> UList{};
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static std::vector<const UClass*> GetParams(const UClass* cls) {
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auto& UList = static_cast<const MyUClass*>(cls)->UList;
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return { UList.data(), UList.data() + UList.size() };
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}
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static void Call(const FieldPtr& field, std::vector<ArgsView>& ArgsList) {
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if constexpr (std::is_same_v<R, void>) {
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MethodType fptr = (MethodType)field.data.method;
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auto param = ArgsList.rbegin();
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fptr(param++->cast_to<Args>()...);
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}
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else {
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MethodType fptr = (MethodType)field.data.method;
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auto param = ArgsList.rbegin();
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auto ret = ArgsList.begin();
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if (ret->cls == &TypeInfo<R*>::StaticClass) {
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*(R*)ret->val = fptr(param++->cast_to<Args>()...);
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}
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else {
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fptr(param++->cast_to<Args>()...);
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}
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}
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}
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protected:
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constexpr void BuildUList() {
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if constexpr (!std::is_same_v<R, void>) {
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UList[0] = &TypeInfo<R*>::StaticClass;
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}
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if constexpr (sizeof...(Args) > 0) {
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auto ptr = &UList[1];
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(..., (*ptr = &TypeInfo<std::remove_pointer_t<Args>*>::StaticClass, ptr++));
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}
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}
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public:
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//为了简化判断，cls 对象 统统指向 T*
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constexpr static MyUClass BuildClass() {
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MyUClass cls(type_name<MethodType>().View(), sizeof(MethodType));
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cls.vtable.GetParams = &MyUClass::GetParams;
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cls.vtable.Call = &MyUClass::Call;
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cls.BuildUList();
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return cls;
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}
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};
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class UClass_Custom : public UClass {
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public:
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using UClass::UClass;
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std::vector<FieldPtr> FList{};
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int32_t AttrNum{ 0 };
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static const FieldPtr* GetField(const UClass* _cls,const Name& name, bool isMethod){
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auto cls = static_cast<const UClass_Custom*>(_cls);
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auto& FList = cls->FList;
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// 指定开始位置的迭代器
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auto start = FList.begin();
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if (isMethod) {
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start += cls->AttrNum;
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}
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auto end = FList.end();
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for (auto it = start; it != end; ++it) {
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if (it->name == name) {
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return &*it;
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}
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}
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return nullptr;
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}
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/*
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void BuildClass() {
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FList.shrink_to_fit();//缩减容量，FList大小不再改变了
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vtable.GetField = &UClass_Custom::GetField;
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}
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*/
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};
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//基础类型的偏特化
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template<_ReflCheck_Ctor_NoUClass T>
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struct TypeInfoImpl<T> {
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using UClass = UClass_Auto<T>;
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inline constexpr static UClass StaticClass = UClass::BuildClass();
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};
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// 函数指针类型的偏特化
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template<typename R, typename... Args>
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struct TypeInfoImpl<R(*)(Args...)> {
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using UClass = UMethod_Auto<R, Args...>;
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inline constexpr static UClass StaticClass = UClass::BuildClass();
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};
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template<_ReflCheck_UClass T>
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struct TypeInfoImpl<T> {
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using MyUClass = typename T::MyUClass;
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inline static MyUClass StaticClass = []()->MyUClass {
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MyUClass cls(type_name<T>().View(), sizeof(T));
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T::BuildClass(cls);
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auto& vtable = cls.vtable;
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if (!vtable.GetField) {
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vtable.GetField = &MyUClass::GetField;
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}
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if constexpr (!std::is_trivially_copyable_v<T>) {
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if (!vtable.InitObject) {
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//这里一定会创建一个InitObject<T> 模板函数，如何优化
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vtable.InitObject = &UClass::InitObject<T>;
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}
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if (!vtable.CopyObject) {
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//这里一定会创建一个CopyObject<T> 模板函数，如何优化
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vtable.CopyObject = &UClass::CopyObject<T>;
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}
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}
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return cls;
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}();
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};
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} |