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How to print name of passed parameter

Brad RFeng

Hi,

I need to print the name of a variable/object passed to a skill procedure from an ADE output expression. In this simple example Pout_dBm is passed to myFunc(). The desired print statement would result in "passed signal = Pout_dBm". 

procedure( myFunc(arg)
    printf("here\n")
    ;;printf("passed signal = %s\n" arg) ;; how to make this work?
    ;;calculation
);;myFunc

Regards,

Brad

  • The only clean way of doing this is to define it as a macro:

    defmacro(myFunc (arg)
      printf("passed signal = %L\n" arg)
      `(2*,arg)
    )

    For example:

    adb=23
    myFunc(adb)
    passed signal = adb
    46

    You may need to read up on macros to figure out the syntax (be careful though - overusing macros can lead to unclear code).

    The idea is that a normal function evaluates all its arguments before it is called, so can't know the name of a variable or the expression passed to it. Macros however are passed the actual code in their arguments and can see that, and are expected to return the transformed expression to evaluate; if called as a normal function, they would also invoke the resulting expression.

    Andrew

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