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Work with Open API Specs (previously swagger) and JSON Schema

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oas src oas decodex.gleam
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src/oas/decodex.gleam 

import gleam/dynamic/decode.{type Decoder}



pub fn discriminate(

  field: name,

  decoder: Decoder(d),

  default: t,

  choose: fn(d) -> Result(Decoder(t), String),

) -> Decoder(t) {

  use on <- decode.optional_field(

    field,

    decode.failure(default, "Discriminator"),

    decode.map(decoder, fn(on) {

      case choose(on) {

        Ok(decoder) -> decoder

        Error(message) -> decode.failure(default, message)

      }

    }),

  )

  on

}