133 lines
3.1 KiB
C++
133 lines
3.1 KiB
C++
#pragma once
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#include "type.h"
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#include "field.h"
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#include "object.h"
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namespace refl {
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class UClass{
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public:
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Name name;
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uint32_t size;
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UClass* parent;
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public:
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constexpr UClass(Name name, uint32_t size, UClass* parent = nullptr)
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:name(name),size(size), parent(parent){}
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ObjectView New(void* ptr = nullptr) const{
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if (ptr == nullptr) {
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ptr = malloc(size);
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InitObject(ptr);
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}
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return { ptr , this };
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}
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template<typename T>
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T* New(T* ptr = nullptr) const{
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if (!IsChildOf<T>()) {
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return nullptr;
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}
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if (ptr == nullptr) {
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ptr = (T*)malloc(size);
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}
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InitObject(ptr);
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return ptr;
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}
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template<typename T>
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bool IsChildOf(bool bthis = false) const {
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constexpr UClass* cls = &TypeInfo<T>::StaticClass;
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if (bthis) {
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return cls == this;
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}
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const UClass* _parent = this;
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while (_parent != nullptr) {
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if (_parent == cls) {
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return true;
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}
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_parent = _parent->parent;
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}
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return false;
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}
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//unsafe if called by other, need check class && size
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virtual void InitObject(void* ptr)const {
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memset(ptr, 0, size);
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}
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virtual const FieldPtr* GetField(const Name& name)const {
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return nullptr;
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}
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protected:
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template<uint32_t offset, typename T,typename U>
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FieldPtr MakeMemberField(T U::* ptr, Name name) {
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FieldPtr::Data member = { offset };
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return { name, &TypeInfo<T>::StaticClass, {member} };
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}
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template<uint32_t offset, typename T, typename U>
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FieldPtr MakeMethodField(T U::* ptr, Name name) {
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FieldPtr::Data member = { offset };
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return { name, &TypeInfo<T>::StaticClass, {member} };
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}
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};
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template<typename T>
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requires std::is_default_constructible_v<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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protected:
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void InitObject(void* ptr)const override {
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constexpr bool is_shallow_copyable = std::is_trivially_copyable<T>::value;
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if constexpr (!is_shallow_copyable){
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constexpr T obj{};
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std::construct_at((T*)ptr, obj);
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}
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else {
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memset(ptr, 0, size);
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}
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}
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public:
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static UClass_Auto<T> BuildClass() {
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auto cls = UClass_Auto<T>(type_name<T>().View(), sizeof(T));
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return cls;
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}
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};
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template<_ReflCheck T, typename>
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struct TypeInfo {
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using UClass = UClass_Auto<T>;
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inline static UClass StaticClass = UClass::BuildClass();
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};
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template<typename T>
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inline bool ObjectView::Get(const Name& name, T& t)
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{
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if (cache && cache->name == name) {
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_cache_get: bool isChild = cache->type->IsChildOf<T>(true);
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if (isChild) {
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t = *(T*)(ptr + std::get<uint32_t>(cache->data));
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}
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return isChild;
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}
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auto field = cls->GetField(name);
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if (field) {
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cache = field;
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goto _cache_get;
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}
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return false;
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}
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template<typename T>
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inline bool ObjectView::Set(const Name& name, const T& t)
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{
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if (cache && cache->name == name) {
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_cache_set: bool isChild = cache->type->IsChildOf<T>(true);
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if (isChild) {
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*(T*)(ptr + std::get<uint32_t>(cache->data)) = t;
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}
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return isChild;
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}
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auto field = cls->GetField(name);
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if (field) {
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cache = field;
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goto _cache_set;
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}
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return false;
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}
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template<typename ...Args>
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bool ObjectView::Invoke(const Name& name, Args... args)
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{
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return false;
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}
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} |