Easily convert variants toString literals

1

Is there a simple short hand way to easily convert a simple variant to strings without the need to match on every variant?

type currency =
  | USD
  | CAD
  | EUR

Looking to easily add

toString(currency) => string

Thanks in advance!

2

As variants are represented as ints I don’t think there is. Would you consider using polymorphic variants? They do provide an easy way to turn them into a string (see this)

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3

Ah, yes this would work just fine, we will move them over to polymorphic variants then :+1:

Thanks @alexeygolev

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4

Do you want to use the strings on the ReScript land or JavaScript Land?

5

They are eventually being used in the JS land, as they need to be passed in as strings to a binding we wrote for Dinero.js.

6

For interop, the easiest solution is to use polymorphic variants. They are compiled to string literals (unless they have a payload).

type currency = [#USD | #CAD | #EUR]

let usd = #USD

Output:

var usd = "USD";

They don’t work exactly the same as regular variants, so they come with some gotchas, but they are also more flexible.

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