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create a table inside the class

skillseeker

Hi,

I would like to create a table for each instance of a class. How best to do it. If i define "makeTable" inside a defclass it gives me an error.

 defclass( pinInfo
    ()
    (
     ( pinName   @initarg pinName )
     ( pinType   @initarg pinType )
     ( netName   @initarg netName )

     PinTable = makeTable("aTable1" 0)

     tablep(PinTable)
    )

  );defclass

I get an error when i define it like this "*Error* slotValue: no such slot - PinTable.

Thanks

Parents

  • You can't just stick arbitrary code inside a class definition - you could either do it with an @initform:

    defclass(pinInfo
      ()
       (
        (pinName @initarg pinName)
        (pinType @initarg pinType)
        (netName @initarg netName)
        (pinTable @initform makeTable("aTable1" 0))
       )
    )

    Then:

    > a=makeInstance('pinInfo)
    stdobj@0x8564018
    > a->pinTable
    table:aTable1
    > a->pinTable["hello"]=23
    23
    > a->pinTable->??
    ("hello" 23)

    Or you could define an initializeInstance method:

    defclass(pinInfo
      ()
       (
        (pinName @initarg pinName)
        (pinType @initarg pinType)
        (netName @initarg netName)
        (pinTable)
       )
    )

    defmethod(initializeInstance @after ((obj pinInfo))
      obj->pinTable=makeTable("aTable1" 0)
    )

    Note that the second approach only works in IC615 onwards. You could use a non-@after method, but then you'd have to make sure you call callNextMethod() appropriately to ensure that any parent objects have a chance to initialize too. The @after directive tells it to call all the other @after methods, least-specific first.The intention for initializeInstance is to handle complex initialization of objects which can't be coded via the @initform (e.g. interdependencies of the arguments).

    Regards,

    Andrew.

Reply

  • You can't just stick arbitrary code inside a class definition - you could either do it with an @initform:

    defclass(pinInfo
      ()
       (
        (pinName @initarg pinName)
        (pinType @initarg pinType)
        (netName @initarg netName)
        (pinTable @initform makeTable("aTable1" 0))
       )
    )

    Then:

    > a=makeInstance('pinInfo)
    stdobj@0x8564018
    > a->pinTable
    table:aTable1
    > a->pinTable["hello"]=23
    23
    > a->pinTable->??
    ("hello" 23)

    Or you could define an initializeInstance method:

    defclass(pinInfo
      ()
       (
        (pinName @initarg pinName)
        (pinType @initarg pinType)
        (netName @initarg netName)
        (pinTable)
       )
    )

    defmethod(initializeInstance @after ((obj pinInfo))
      obj->pinTable=makeTable("aTable1" 0)
    )

    Note that the second approach only works in IC615 onwards. You could use a non-@after method, but then you'd have to make sure you call callNextMethod() appropriately to ensure that any parent objects have a chance to initialize too. The @after directive tells it to call all the other @after methods, least-specific first.The intention for initializeInstance is to handle complex initialization of objects which can't be coded via the @initform (e.g. interdependencies of the arguments).

    Regards,

    Andrew.

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