[fpc-pascal] Unrelated type helpers with the same members? Implement an interface with a type helper?

[Andrew Haines]

On 12/23/22 5:24 AM, Ondrej Pokorny via fpc-pascal wrote:
> This may be simpler:
>
> [TEnumAttr(['YES', 'NO', 'COULD_BE'])]
>   TMyEnum = (meYes, meNo, meCouldBe);
>
> TEnumAttr = class(TCustomAttribute)
>   protected
>     FValues: TStringArray;
>     FTypeName: String;
>   public
>     class function FromType(ATypeInfo: PTypeInfo): TEnumAttr;
>     constructor Create(Values: array of string);
>
> ---


I tried that first but the compiler gave an error on the "["

Error: Ordinal expression expected

[TEnumAttr(['YES', 'NO', 'COULD_BE'])]

>
> Or, if the enum values are valid identifiers, you can simple use 
> scoped enums:
>
> {$SCOPEDENUMS ON}
>   TMyEnum = (YES, NO, COULD_BE);
>
> and the usual TypeInfo methods.
>
> Ondrej
>
>
I didn't know about those, that could also be a good solution, thanks!

Andrew