Does struct field renaming support private fields?

[disconsented]

I am trying to map across the stripe.CreatePaymentMethod function, but I am running into a bit of a blocker.

Because type is a keyboard it cannot be used as an attribute name thankfully #2360 was pulled in and I've ended up with the following:

#[wasm_bindgen]
pub struct PaymentMethodData{
    #[wasm_bindgen(js_name = type)]
    foo: String,
    card: Card,
    billing_details: BillingDetails,
}

card is a JS type and BillingDetails is a struct.

However, the following results in the following from the compiler:
error: expected an inert attribute, found an attribute macro

I have also tried:

#[wasm_bindgen]
pub struct PaymentMethodData{
    r#type: String,
    card: Arc<Card>,
    billing_details: BillingDetails,
}

Which does compile but stripe throws a runtime error (IntegrationError: Invalid value for createPaymentMethod: type should be string. You specified: undefined.).

Any ideas on where to go from here?

[alexcrichton]

I don't think that private fields are exported into JS, so if you're passing this to an API that expects to be able to access a type property then that won't work? You'll need to probably make an impl with methods that work as accessors?

[disconsented]

Okay I've finally figured out what is going on, internally stripe elements is accessing using bracket notation which is where the issue has cropped up from.

var i = r[o]

Where r is the object and o is a string with a field name, is there a way to expose fields for this or would I need to write a small translation layer?

[alexcrichton]

Ah that makes sense! I'm unfortunately not enough of a JS-wizard to know what the options available to wasm-bindgen are to solve that. I'd probably have a small layer for now to translate.