[Octave-bug-tracker] [bug #56752] Performance slowdown from version 3.2.4 through to current dev branch

[Rik]

Follow-up Comment #29, bug #56752 (project octave):

Yes, you're right.  C++ is a complicated language :(

I wrote my own test case as a .oct file 


#include <octave/oct.h>

DEFUN_DLD (tst_const, args, , "")
{
  octave_value_list tmp;

  // These are OK, they resize.
  octave_value x = tmp(2);
  const octave_value y = tmp(3);

  int nargin = args.length ();
  if (nargin > 0)
    {
      const octave_value_list tmp (1, 2);

      // These fail, they don't resize and access beyond the end of the
array.
      octave_value x = tmp(3);
      const octave_value y = tmp(4);
    }

  return ovl ();
}


If the object is declared const then Octave shouldn't be silently increasing
the size of the array so I think the current behavior--segfault--is correct.



    _______________________________________________________

Reply to this item at:

  <https://savannah.gnu.org/bugs/?56752>

_______________________________________________
  Message sent via Savannah
  https://savannah.gnu.org/