Return value of type ValidationResult contains both value and error, which is inconsistent

[StephanMeijer]

Support plan

• is this issue currently blocking your project? (yes/no): yes
• is this issue affecting a production system? (yes/no): yes

Context

• node version: v18.7.0
• ts-node version: v10.9.1
• module version with issue: joi
• last module version without issue: unsure
• environment (e.g. node, browser, native): node (ts-node)
• used with (e.g. hapi application, another framework, standalone, ...): standalone / hapi application
• any other relevant information:

Types defined as following:

or

    type ValidationResult<TSchema = any> = {
        error: undefined;
        warning?: ValidationError;
        value: TSchema;
    } | {
        error: ValidationError;
        warning?: ValidationError;
        value: undefined;
    }

What are you trying to achieve or the steps to reproduce?

import Joi from 'joi';

const schema = Joi.string()
        .required()
        .valid('only allowed value');

const result = schema.validate("a non-allowed value");

console.log(result);

What was the result you got?

{
  value: 'a non-allowed value',
  error: [Error [ValidationError]: "value" must be [only allowed value]] {
    _original: 'a non-allowed value',
    details: [ [Object] ]
  }
}

What result did you expect?

{
  value: undefined,
  error: [Error [ValidationError]: "value" must be [only allowed value]] {
    _original: 'a non-allowed value',
    details: [ [Object] ]
  }
}

[SimonSchick]

FYI This seems to have the side effect that when destructuring the validation result value is always any, is this intentional?