Description

Enums represent aclosed list of possible values. Supportingbacked enums as option or argument type would enable:

• Auto-completion from enum cases values (ie:suggestedValues: BackedEnum::cases() values)
• Validation of the input value with a nice error message
• No need to callBackedEnum::tryFrom($input) in the command__invoke.

In Symfony itself, most of the--format options could be enums.

Example

Given a backed enum like this:

enum EmbeddingType:string{case Image ='image';case Description ='description';}

The argument parameter should accept a backed enum type,

#[AsCommand(name:'app:regenerate')]class RegenerateCommand{publicfunction__invoke(#[Argument]EmbeddingType$type):int    {$this->generator->generate($type);    }}

If the command is run with an invalid value, an error is returned.

$ app/console app:regenerate yolo                                         The "yolo" value is not accepted. Use one of "image", "description".