[Octave-bug-tracker] [bug #45835] wrong scope may be used in anonymous function evaluation

[Rik]

Update of bug #45835 (project octave):

                  Status:               Need Info => Confirmed              

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Follow-up Comment #8:

Very deep in the weeds.  I had no idea functions like __current_scope__
existed.  I corrected the function name in the docstring and added a one-line
definition here (http://hg.savannah.gnu.org/hgweb/octave/rev/33b03b06442b).

Attached is a little m-file mainfcn.m which shows how scope and context change
with a function, subfunction, nested function and recursion--useful for
learning.

Function is


function mainfcn ()
  persistent recurse_count = 0;

  [s1, c1] = __current_scope__ ();
  printf ("Scope, Context in main function: %d, %d\n", s1, c1);
  subfcn ();
  function nestfcn ()
    [s3, c3] = __current_scope__ ();
    printf ("Scope, Context in nested function: %d, %d\n", s3, c3);
  endfunction  
  nestfcn ();

  printf ("------------------------------------------------------------\n");

  if (recurse_count++ < 5)
    mainfcn ();
  else
    return;
  endif

endfunction

function subfcn ()
  [s1, c1] = __current_scope__ ();
  printf ("Scope, Context in subfunction: %d, %d\n", s1, c1);
endfunction


Output is


octave:1> mainfcn
Scope, Context in main function: 58, 0
Scope, Context in subfunction: 60, 0
Scope, Context in nested function: 59, 0
------------------------------------------------------------
Scope, Context in main function: 58, 1
Scope, Context in subfunction: 60, 0
Scope, Context in nested function: 59, 0
------------------------------------------------------------
Scope, Context in main function: 58, 2
Scope, Context in subfunction: 60, 0
Scope, Context in nested function: 59, 0
------------------------------------------------------------
Scope, Context in main function: 58, 3
Scope, Context in subfunction: 60, 0
Scope, Context in nested function: 59, 0
------------------------------------------------------------
Scope, Context in main function: 58, 4
Scope, Context in subfunction: 60, 0
Scope, Context in nested function: 59, 0
------------------------------------------------------------
Scope, Context in main function: 58, 5
Scope, Context in subfunction: 60, 0
Scope, Context in nested function: 59, 0
------------------------------------------------------------




(file #34765)
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Additional Item Attachment:

File name: mainfcn.m                      Size:0 KB


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