Why can't class subprograms be subprogram variables?

[Mackie]

Turing:

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?

[Saad]

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.

Turing:

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