More subfunction scoping issues.

[David Bateman]

John and All,

John recently introduced a number of fixes for subfunction scoping
issues, that vastly improvement the compatibility between octave and
matlab. However, there remains a few issues that need to be addressed to
get the compatibility to be 100%. Consider the test function

function toto2 ()
  x = toto(23)
  x.titi(1)
  x.titi(1)
  x.titi(1)
  x.tata()
  x.c
end

function y = toto (a)
  y.titi = @titi;
  y.tata = @tata;
  y.c = 1;
  function p = titi (q)
    p = q + a;
    a = a + y.c;
    y.c = y.c + 1;
  end
  function z = tata()
    z = tutu();
    function z = tutu ()
      z = y.c;
    end
  end
end

which tries to demonstrate a number of these scoping issues. Which
R2006b I get

x =

    titi: @toto/titi
    tata: @toto/tata
       c: 1


ans =

    24


ans =

    25


ans =

    27


ans =

     4


ans =

     1

Of course with octave it crashes on the first call to "titi" as the
variable "a" that is in the scope of the parent of titi is not visible
in the scope of titi. What would be needed to fix this issue, as I've
just been given a large chunk of matlab code that relies on these
scoping rules? So if the effort isn't much I wouldn't mind attacking
this issue rather than modifying the code I've been given to allow
easier exchange with the people giving me the code.

Regards
David

-- 
David Bateman                                address@hidden
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