[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

[TeamDman]

https://discord.com/channels/967118679370264627/967119184209264790/1361138455932829759

EVERY 20 TICKS DO
  INPUT FROM stands ROUND ROBIN BY BLOCK
  IF stands ROUND ROBIN BY BLOCK HAS = 0 THEN -- this round robin returns a different source than previous
    ...
  END
END

With variables, would be nice to be able to materialize a round robin to be used in multiple places.

Thinking something like

Every 20 ticks do
  Input from chest
  Let furnace be furnaces round robin by block
  If furnace has eq 0 then
    Output to furnace
  End 
End 

This will move to one furnace per execution. We also want to support operating over all furnaces in one execution.

The typical imperative approach would look like

Every 20 ticks do
  Input from chest
  For furnace in furnaces do
    If furnace has eq 0 then
      Output to furnace
    End 
  End 
End

It would be possible to identify statements using a variable that's bound by a round robin variable and to execute those statements for each assignment of that variable

Every 20 ticks do
  Input from chest
  Let furnace be each block in furnaces
  If furnace has eq 0 then
    Output to furnace
  End 
End

This would create an implicit for loop, reducing the level of nesting.

[TeamDman]

For each block "furnace" in furnaces that has eq 0 do
  Output to furnace
End

Could combine for-each and if too

[rinjingu]

Is the feature implemented yet? I personally want variables for better and easier maintenance of my factory for the ore processing hub.

[TeamDman]

not implemented yet