Macro rules fill the rest of a vec with empty, but keeping initial iteration

1

Hello,
this is the following of a previous answered question.
But now, I need to use initial repetition to run a function:

I just need a way to get $($value ,)* back to use it inside the macro.

Thank you in advance for your help.

2

I am stuck at:

3

Now, I get a local ambiguity:

4

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