Puzzled about scope/existence of globals

[Glenn Golden]

Given the function foo(), defined as

    function foo()
        global g;
        exist("g", "var")
    endfunction

I found the following to be surprising:

    1>   foo
    ans = 0                     # ok

    2>   global g

    3>   g.barf = 1;

    4>   foo
    ans = 1                     # ok

    5>   clear g 

    6>   whos g 
                                # ok
    7>   foo
    ans = 1                     # huh?

Perhaps this is expected behavior, but I don't understand it.
Can someone explain the rules regarding scope and existence
of globals in a circumstance like this?

Thanks,

- Glenn



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