225 lines
6.8 KiB
C++
225 lines
6.8 KiB
C++
#pragma once
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#include <array>
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#include "uclass.h"
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namespace refl {
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template <class T>
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concept _ReflCheck_Metas = requires(const Name & name) { MetaImpl<T>::MyMetas::GetMeta(name); };
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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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consteval static MyUClass BuildClass() {
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MyUClass cls(type_name<T>().View(), sizeof(T));
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if constexpr (std::is_pointer_v<T>){
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using RawT = std::remove_pointer_t<T>;
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cls.flag = CLASS_POINTER_FLAG;
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if constexpr (!std::is_same_v<RawT, void>) {
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cls.parent = &TypeInfo<RawT>::StaticClass;
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}
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}
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else {
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cls.vtable.CtorObject = &MyUClass::CtorObject<T>;
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}
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if constexpr (_ReflCheck_Metas<T>) {
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cls.vtable.GetMeta = &MetaImpl<T>::MyMetas::GetMeta;
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}
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return cls;
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}
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void Set(void* ptr,const T& t) {
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*(T*)ptr = t;
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}
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T& Get(void* ptr) {
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return *(T*)ptr;
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}
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};
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template<_ReflCheck_Ctor T, int N>
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class UClass_Array : public UClass {
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public:
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using UClass::UClass;
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using MyUClass = UClass_Array<T, N>;
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public:
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consteval static MyUClass BuildClass() {
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MyUClass cls(type_name<T[N]>().View(), sizeof(T) * N, &TypeInfo<T>::StaticClass);
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if constexpr (std::is_pointer_v<T>) {
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cls.flag = CLASS_POINTER_FLAG | CLASS_ARRAY_FLAG;
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}
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else {
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cls.flag = CLASS_ARRAY_FLAG;
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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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consteval sarray<const UClass*> GetParams()const {
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return sarray<const UClass*>(&UList.front(), UList.size());
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}
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static sarray<const UClass*> GetParams(const UClass* cls) {
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auto& UList = static_cast<const MyUClass*>(cls)->UList;
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return sarray<const UClass*>(&UList.front(),UList.size());
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}
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//这里顺序似乎是不确定的，但是我实际运用是对的
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//如果使用make_index_sequence,会多一次函数调用
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//为什么包裹一层迭代器，就不会出现警告了
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static void Call(const FieldPtr* field, const sarray<Any>& ArgsList) {
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assert(sizeof...(Args) <= ArgsList.size());
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if constexpr (std::is_same_v<R, void>) {
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MethodType fptr = (MethodType)field->data.method.fptr;
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auto param = ArgsList.end();
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fptr((param--->CastTo<Args>())...);
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}
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else {
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MethodType fptr = (MethodType)field->data.method.fptr;
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auto param = ArgsList.end();
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auto ret = ArgsList.front();
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if (ret->cls == &TypeInfo<R>::StaticClass) {
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*(R*)ret->ptr = fptr((param--->CastTo<Args>())...);
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}
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else {
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fptr((param--->CastTo<Args>())...);
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}
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}
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}
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protected:
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consteval 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<args_type_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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consteval 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.flag = CLASS_TRIVIAL_FLAG;
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cls.BuildUList();
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return cls;
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}
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};
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template<typename T, typename MyMeta>
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class UClass_Meta : public UClass {
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public:
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using FieldsType = decltype(MyMeta::__MakeFields());
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FieldsType Fields{ MyMeta::__MakeFields() };
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UClass_Meta() : UClass(type_name<T>().View(), sizeof(T)){
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if constexpr (std::is_trivially_copyable_v<T>) {
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flag = CLASS_TRIVIAL_FLAG;
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}
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if constexpr (_ReflCheck_Parent<MyMeta>) {
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parent = &TypeInfo<typename MyMeta::Parent>::StaticClass;
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}
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if constexpr (_ReflCheck_Metas<T>) {
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vtable.GetMeta = &MetaImpl<T>::MyMetas::GetMeta;
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}
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vtable.GetFields = &UClass_Meta::GetFields;
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vtable.CtorObject = &UClass::CtorObject<T>;
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}
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const FieldPtr* GetField(int index) const {
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return &Fields[index];
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}
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const sarray<const FieldPtr> GetFields(EFieldFind find, const Name& name) const {
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constexpr int length = std::tuple_size<FieldsType>::value;
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constexpr int MemberCount = MyMeta::MyStatic::MemberCount();
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constexpr int CtorCount = MyMeta::MyStatic::CtorCount();
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switch (find) {
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case EFieldFind::FIND_ALL_FIELD:
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return sarray<const FieldPtr>(&Fields[0], length);
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case EFieldFind::FIND_ALL_MEMBER:
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return sarray<const FieldPtr>(&Fields[0], MemberCount);
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case EFieldFind::FIND_ALL_METHOD:
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return sarray<const FieldPtr>(&Fields[MemberCount + CtorCount], length - MemberCount - CtorCount);
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case EFieldFind::FIND_CTOR:
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return sarray<const FieldPtr>(&Fields[MemberCount], CtorCount);
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case EFieldFind::FIND_FIELD:
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for (int i = 0; i < length; i++) {
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if (name == Fields[i].name) {
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return sarray<const FieldPtr>(&Fields[i], 1);
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}
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}
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return {};
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case EFieldFind::FIND_MEMBER:
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for (int i = 0; i < MemberCount; i++) {
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if (name == Fields[i].name) {
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return sarray<const FieldPtr>(&Fields[i], 1);
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}
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}
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return {};
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case EFieldFind::FIND_METHOD:
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for (int i = MemberCount + CtorCount; i < length; i++) {
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if (name == Fields[i].name) {
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return sarray<const FieldPtr>(&Fields[i], 1);
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}
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}
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return {};
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case EFieldFind::FIND_METHODS:
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{
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int first = 0,count = 0;
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for (int i = MemberCount + CtorCount; i < length; i++) {
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if (name == Fields[i].name) {
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if (!count) {
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first = i;
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}
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count++;
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}
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else if (count) {
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return sarray<const FieldPtr>(&Fields[first], count);
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}
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}
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return {};
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}
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default:
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return {};
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}
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}
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static const sarray<const FieldPtr> GetFields(const UClass* _cls, EFieldFind find, const Name& name) {
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auto cls = static_cast<const UClass_Meta*>(_cls);
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return cls->GetFields(find, name);
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}
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};
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template<>
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struct TypeInfoImpl<void> {
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inline constexpr static UClass StaticClass = { type_name<void>().View(), 0 };
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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 = UClass_Meta<T, typename MetaImpl<T>::MyMeta>;
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inline static MyUClass StaticClass = MyUClass();
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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<typename T, int N>
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struct TypeInfoImpl<T[N]> {
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using UClass = UClass_Array<T,N>;
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inline constexpr static UClass StaticClass = UClass::BuildClass();
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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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} |