🚀 go-pugleaf

Hi,

Allow me a question which may be trivial for you guys. I'm a
beginner of C++ and therefore interested in the following
flavour of inheritance:

    In Smalltalk-80 you can use inheritance as in this sample program:

    (***********************************)

    class name       One
    superclass       Object
    instance methods

	test
	    ^1

	result1
	    ^self test


    class name       Two
    superclass       One
    instance methods

	test
	    ^2


    class name       Three
    superclass       Two
    instance methods

	result2
	    ^self  result1
	result3
	    ^super test


   (*************************************)

   Now create new instances:

    example1 <- One new
    example2 <- Two new
    example3 <- Three new

    and consider scenarios like this:

    expression           result
    ----------           ------

    example1 test          1
    example1 result1       1
    example2 test          2
    example2 result1       2
    example3 test          2
    example3 result2       2
    example3 result3       2



    Now comes the tricky part: How can I translate the behavior of
    the code outline above to the appropiate structures in C++ ?
    How do you move *up and down* in a given class hierarchy,
    like in my little example, using C++ ?

    Is it possible to cover this examples with an easy to understand and well
    structured program in C++, how is this best done ?

    Could anybody give me a pointer ?

    Thanx

    Franco M. Monti
    Olsen & Associates
    Seefeldstr. 233
    8008 Zuerich

    Switzerland