From bug-octave-request at bevo dot che dot wisc dot edu Mon Dec 15 22:53:41 2003
Subject: unknown type for structure array slices
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: Paul Kienzle <pkienzle at jazz dot ncnr dot nist dot gov>
Cc: bug-octave at bevo dot che dot wisc dot edu
Date: Mon, 15 Dec 2003 22:53:39 -0600

On 15-Dec-2003, Paul Kienzle <pkienzle at jazz dot ncnr dot nist dot gov> wrote:

| In octave-2.1.52 debian and octave-cvs-2003-12-15, typeinfo for
| structure array slices is confused:
| 
| octave:1> t(3).a = 1;
| octave:2> typeinfo(t.a)
| 
| *** typeinfo:
| 
|  - Built-in Function:  typeinfo (EXPR)
|      Return the type of the expression EXPR, as a string.  If EXPR  is
|      omitted, return an array of strings containing all the currently
|      installed data types.
| 
| 
| octave:3> t.a
| ans =
| 
| (,
|   [1] = [](0x0)
|   [2] = [](0x0)
|   [3] = 1
| ,)

This is not a bug because t.a is a comma-separated list, and in a
function call context, the elements of the list are passed as separate
arguments.  So in the above, typeinfo (t.a) is equivalent to

  typeinfo (t(1).a, t(2).a, t(3).a)

jwe



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