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Mackie

Thu Mar 27, 2008 5:17 pm


Why can't class subprograms be subprogram variables?

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proc foo (run : proc _)
    run
end foo

class bar

    import foo

    proc foobaz
        put "FizzBiz"
    end foobaz

    foo (foobaz)

end bar


Here is a very simple example of my problem, I planned out a whole new version of my file browser around being able to do this, assuming I was able to. But, I can't so is there some way around this, or does anyone have any suggestions for an alternative method?


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Saad

Thu Mar 27, 2008 5:53 pm


Re: Why can't class subprograms be subprogram variables?

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Classes are supposed to be blue prints for objects, consequently when you try calling foo (foobaz), it doesn't occur since your calling foo with a foobaz that belongs to an object of that class. 

Although it is possible to create a variable for a procedure.


proc foo (run : proc _)
    run
end foo

class bar
    import foo
    var bodyFunction : proc _ ()

    %% This call works because we know that it belongs to the instance of bar
    foo (bodyFunction)

end bar