how to use schProduceUniqueCVHier in Scheme

Laurent,

Two things. First of all, even if you use defglobalfun, the function is still defined within the lexical scope and so can access lexically scoped variables (i.e. paramTbl). This mild modification of your code (just to record something in the visitor function) works fine:

(defun mainFun (lib cell view)
  (let ( (cv (dbOpenCellViewByType lib cell view))
        (viewList (myGetViewList)) ; myGetViewList is a skill function
        (paramTbl (makeTable "paramTbl")) )

    (defglobalfun visitCB (cell depth hierPath stopCv)
      ;;; append paramTbl with found parameters in cell
      ;;; just doing a dummy update for now
      (setarray paramTbl cell t)
      )

    (schProduceUniqueCVHier 'visitCB cv viewList  nil nil)
    paramTbl

    ))

(setq tbl (mainFun "ether" "top" "schematic"))

However, schProduceUnqueCVHier also accepts a function object as the first argument. Because of this, you can do:

(defun mainFun (lib cell view)
  (let ( (cv (dbOpenCellViewByType lib cell view))
        (viewList (myGetViewList)) ; myGetViewList is a skill function
        (paramTbl (makeTable "paramTbl")) )

    (defun visitCB (cell depth hierPath stopCv)
      ;;; append paramTbl with found parameters in cell
      ;;; just doing a dummy update for now
      (setarray paramTbl cell t)
      )

    (schProduceUniqueCVHier visitCB cv viewList  nil nil)
    paramTbl

    ))

(setq tbl (mainFun "ether" "top" "schematic"))

No global functions were needed here.

Regards,

Andrew

Hello Andrew,

Thank you for the asnwers.

1. My understanding of lexical scoping is still weak and I didn't realize that even the global function (defglobalfun) accesses the parameters defined  in the same scope

2. I had tried the syntax without the quote in schProduceUniqueCVHier. When I use defun instead for defining the function and use the syntax with the function object in schProduceUniqueCVHier, I get the foolowing error :

*** Error in routine schProduceUniqueCVHier:
Message: *Error* schProduceUniqueCVHier: argument #1 should be a symbol (type template = "sdggllg") at line 55 of file ... 
- funobj@0x4dfa02f0

kkdesbois said:

2. I had tried the syntax without the quote in schProduceUniqueCVHier

Ah, this was a more recent change. In IC23.1 ISR5 (released end of February 2024) the function was updated to allow a function object to be passed; before that it was a symbol only as you have discovered. I assume you must be using an older version...

Regards,

Andrew

Exact.

I usually use the last IC version available (I've been well educated by Cadence AEs ;))

But exceptionnally, I was using IC20.1 ISR34 for testing other features of my code. So my trials of schProduceUniqueCVHier were in this current session.

Finally, I'm a bit lucky because the final user of the code may use 20.1 or 23.1. So I will use defglobalfun which seems  to work with all ic versions.

Thanks again for the support.