How to establish Conditional required

[gotenxds]

Hello, is would like to create a type that is required based on the value of a different type.

in JSON schema you could do this like so:

         x: {
          type: 'object',
          properties: {
            value: {type: 'boolean'},
            range: {type: 'integer', multipleOf: 5, minimum: 0, maximum: 60}
          },
          if: {
            properties: {
              value: {const: true}
            }
          },
          then: {required: ['range']}
}

In typia, to the best of my ability I was able to create something similar using unions

x: { value: false; range?: number } | { value: true; range: number }

But this is not the same, the generated json-schema will be a oneOf and the const value of 'true' is generated like so {type: boolean; enum: [true]} which is a really odd way of doing it.

is this at all possible with typia?

[samchon]

Not possible, because TypeScript does not have the if condition type spec.

Instead, the union (oneOf) type will cover what you want.

[gotenxds]

Thanks @samchon, the oneof will not cover what I want, they are not functionally the same, the json schema resulted is not the same and is interpreted differently in different tools.

Guess for now I'l stick with TypeBox which do support it.