Extending structs

Is there an easy way to extend struct objects? I read through the documentation and couldn’t figure out how to do it. I’d like to write something like this:

class A {
    someProp = "";
    static validationStruct = object({ someProp: string() });
}

class B extends A {
    anotherProp = 0;
    static validationStruct = A.validationStruct.extend({ anotherProp: number() });
}

const b = new B();
assert(b, B.validationStruct)

Maybe this is an anti-pattern or there’s a better way. Would love any insight you can offer. Thanks.

[ianstormtaylor]

@xiaoyu-tamu hoping to merge it imminently.

[SteveDeWald]

Hey @SteveDeWald , did you get anything on this?

I ended up specifying the extended properties directly, e.g.:

class A {
    someProp = "";
    static validationStructAttrs = { someProp: string() };
}

class B extends A {
    anotherProp = 0;
    static validationStruct = object({ 
        ...A.validationStructAttrs,
        anotherProp: number()
    });
}

Not very elegant, but it works fine for my purposes.