Enum parsing key of negative numbers

[tiberiuzuld]

Hello,

We have the following situation where we have an Enum with negative and positive numbers as keys to the Enum and the keys generated in typescript collide for negative numbers with positive numbers.

Java code

public enum property {
    NOT_SET(-1, ""),
    NONE(0, "none"),
    SOME_VALUE(1, "some_value"),
    SOME_OTHER_VALUE(2, "some_other_value"),
    EXTRA_VALUE(3, "extra_value")
}

Swagger json

{
  "property": {
    "type": "string",
    "enum": [
      "-1",
      "0",
      "1",
      "2",
      "3"
    ]
  }
}

Generated Typescript

export namespace MyClass {
  export enum property {
    _1 = '-1',  // error same key
    _0 = '0',
    _1 = '1',   // error same key
    _2 = '2',
    _3 = '3'
  }
}

Possible issue here

[cben]

If you have control over the openapi.json, it's possible to specify preffered names:

"enum": [
  "-1",
  "0",
  "1"
],
"x-enum-varnames": [
  "DISLIKE",
  "NO_VOTE",
  "LIKE"
],

But I'm on a team that generates TS from an external openapi (which had x-enum-varnames but now dropped them), so also interested in a fix...
@ferdikoomen, what do you think of translating '-2' to __2? Or how about _MINUS_2 (imho better)?