Re: [vim/vim] E1041 is thrown when a variable is exported from a script contained in the autoload/ folder and the script is sourced more than once (Issue #19205)

mao-yining left a comment (vim/vim#19205)

@h-east 
> Normal def functions can be redefined, but since enum/class are part of the type system, I believe redefining them is prohibited due to compatibility issues with existing instances.

Actually, under the current implementation, if a type is modified, existing instances do not get refreshed—they retain their previous behavior, while only new instances will apply the changes.

So my current approach is to store all instances in a table within the script. Instead of using `.new()` directly, external callers use a `GetInstance()` function to get instances. This way, when a class is live-reloaded, all existing instances are cleared as well.

In summary, I believe that supporting dynamic reloading for exported enums/classes under autoload is still worth considering.

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