[Feature Request] Addition of Variables

[goodcaster1]

Requesting variables for use in things like exception lists and the like. Whether this is implemented as true variables or with aliasing is up to you.

Example:

every 20 ticks do 
    input 
        except--start of Exclusion list A
            source_gem,
            source_jar,
            source_gem_block,
            heart_of_the_deep
        from Chest
    output retain 1 to each Pedestal
    forget

    input from Chest
    output to Apparatus
    forget

    input
        except--Mirrors above list A
            source_gem,
            source_jar,
            source_gem_block,
            heart_of_the_deep 
        from Apparatus
    output to Provider

end

Variables makes it something like:

Exceptions=[source_gem, source_jar, source_gem_block, heart_of_the_deep]

every 20 ticks do 
    input except Exceptions from Chest
    output retain 1 to each Pedestal
    forget

    input from Chest
    output to Apparatus
    forget

    input except Exceptions from Apparatus
    output to Provider

end

Aliasing makes:

Exceptions as source_gem, source_jar, source_gem_block, heart_of_the_deep

every 20 ticks do 
    input except Exceptions from Chest
    output retain 1 to each Pedestal
    forget

    input from Chest
    output to Apparatus
    forget

    input except Exceptions from Apparatus
    output to Provider

end

Fully possible that this is already implemented and I never saw, in which case an example show casing it would be nice.

[TeamDman]

Variables are indeed not implemented yet. My main hangup is deciding on a pattern matching syntax for nbt expressions which are also not a thing yet. It should be possible to express "input items with 2-4 enchantments" which would be something like

Input with data like {enchantments like [_, _]|[_, _, _] |[_, _, _, _]}

This is kinda ugly tho and would be nice to find a natural language syntax instead of such a symbol heavy one like json and rust/Haskell patterns