Discussion: How to avoid manually setting descriptors for each attribute?

[edoCsItahW]

How to avoid manually setting descriptors for each attribute

There is a class that has many properties, but I have a way to dynamically collect these properties, so I use Maps to store them and hope they can be exposed to Nodejs. That's where the problem lies.

---

Assuming that according to the process, it should be like this

class A {
    private:
        attr1;
        attr2;
        ...
    
    public:
        getAttr1();
        setAttr1(attr);
        getAttr2();
        setAttr2();
        
        Init(env, exports) {
            func = DefineClass(env, "A", {
                InstanceAccessor("attr1", &A::getAttr1, &A::setAttr1),
                InstanceAccessor("attr1", &A::getAttr2, &A::setAttr2),
                ...
            })
        }
}

But I don't want to set descriptors for every attribute, so I made the following attempts

1. Use decorators

// Definition in napi. h
using InstanceGetterCallback = Napi::Value (T::*)(const CallbackInfo& info);
using InstanceSetterCallback = void (T::*)(const CallbackInfo& info, const Napi::Value& value);

This doesn't work because the T::* in InstanceGetterCallback restricts my return type from being a free function

2. Retrieve the key from the parameters received by the Setter function

set(const Napi::CallbackInfo& info, const Napi::Value& value)

But info does not contain a key, it contains the same value as value, and the key passed in by the user is unknown what has taken it away

So do you have any good methods?