Hi Peter,

I tried to perform this transformation with��RewriteTool��and got the same DNU.��

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However when I tried to execute it I was met with DNU OrderedCollection>>parent:

It seems that the @first/@second part are not matched properly.

Actually they are matched properly, because if you try to put in transformation part, for example, {``@first.``@second} everything works fine.��

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Any way to fix this? Or am I doing it wrong?

I believe you are doing everything just fine. However, it is definately the problem of RBParseTreeRewriter or something related to it.��

Try to execute following code in playground and you will get the same DNU:

| rewriter |

rewriter := RBParseTreeRewriter new replace: '| base |

base := {(#Department

{``@first.

``@second})}' with: '| base |

base := {#Department -> (Array with: ``@first with: ``@second)}'.

(rewriter executeTree: (RBParser parseRewriteExpression: '| base |

base := {(#Department

{(1 @ 255).

(Color lightMagenta)})}'))

ifTrue: [ rewriter tree asString inspect ].

This code does exactly the same that RewriteTool should do when you put all the parts into it.��

Thus, I think, it is not a problem with the tool.

Cheers,

Mark