60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
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#pragma once
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#include "type.h"
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namespace refl {
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class UClass;
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//生命周期短，适用于传参，不建议保存数据
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//只能指向指针，引用=>指针，指针=>指针，T => T*,T的类型丢失
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struct Any {
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public:
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const void* ptr;
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const UClass* cls;
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constexpr Any(const void* ptr,const UClass* cls) : ptr(ptr), cls(cls) {}
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constexpr Any() : ptr(nullptr), cls(nullptr) {}
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//右值=>右值压入栈，caller入栈地址
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//左值=>caller变量地址
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template<typename T>
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constexpr Any(T&& v) : ptr(&v), cls(&TypeInfo<args_type_t<T>*>::StaticClass) {
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if constexpr (std::is_same_v<args_type_t<T>, Any>) {
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ptr = v.ptr;
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cls = v.cls;
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}
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}
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template<typename T>
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constexpr Any(T* v) : ptr(v), cls(&TypeInfo<args_type_t<T>*>::StaticClass) {
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if constexpr (std::is_same_v<args_type_t<T>, Any>) {
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ptr = v->ptr;
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cls = v->cls;
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}
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}
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template<typename T>//参数 T* => T*
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constexpr inline T cast_to() const {
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if constexpr (std::is_pointer_v<T>) {
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return (T)ptr;
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}
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else if constexpr (std::is_reference_v<T>) {
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using RT = std::remove_reference_t<T>;
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return *(RT*)ptr;
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}
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else {
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return *(T*)ptr;
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}
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}
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template<typename T>
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T cast_ret() const {
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if constexpr (std::is_pointer_v<T>) {
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return *(T*)ptr;
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}
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else if constexpr (std::is_reference_v<T>) {
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using RT = std::remove_reference_t<T>;
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return **(RT**)ptr;
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}
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else {
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return *(T*)ptr;
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}
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}
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Any* ConvertTo(const UClass* toClass);
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constexpr bool IsValid() const{
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return cls != nullptr && ptr != nullptr;
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}
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};
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}
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