From bug-octave-request at bevo dot che dot wisc dot edu  Mon Oct  4 12:42:19 1999
Subject: Re: Unidentified subject!
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: bug-octave at bevo dot che dot wisc dot edu
Cc: Victor Eijkhout <eijkhout at cs dot utk dot edu>, bug-octave@bevo.che.wisc.edu
Date: Mon, 4 Oct 1999 12:42:19 -0500 (CDT)

On  4-Oct-1999, Joao Cardoso <jcardoso at inescn dot pt> wrote:

| Victor Eijkhout wrote:
| > 
| > To: bug-octave at bevo dot che dot wisc dot edu
| > Subject: 'global' statement with initialisation does not work if multiple invocations
| > 
| > Bug report for Octave 2.0.13 configured for i686-pc-linux-gnu
| > 
| > Description:
| > -----------
| > 
| > A statement 'global <var> = <value>' does not behave as an assignment
| > when issued repeatedly.
| > 
| > Repeat-By:
| > ---------
| > 
| > global x = 3;
| > x = 5;
| > global x = 
| 
| 
| Global variables can be initialized only once, as src/ChangeLog says:
| 
| Wed Nov 19 00:08:13 1997  John W. Eaton  <jwe at bevo dot che dot wisc dot edu>
| 
|     * pt-decl.cc (tree_global_command::do_init): Initialize global
|     values to `[]'.  Only perform explicit initialization once.

As I remember, the reason for this change was to make it possible to
fake static variables using a global variable.

  function f ()
    global some_var = 0;
    ...
  endfunction

In 2.1.x, there is a static declaration, so maybe this change is not
really right.

I'm open to suggestions.

jwe





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