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/*
Copyright (C) 1996-2015 John W. Eaton
This file is part of Octave.
Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
Octave is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING. If not, see
<http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "error.h"
#include "oct-obj.h"
#include "oct-lvalue.h"
#include "ov.h"
void
octave_lvalue::assign (octave_value::assign_op op, const octave_value& rhs)
{
if (! is_black_hole ())
{
if (idx.empty ())
sym->assign (op, rhs);
else
sym->assign (op, type, idx, rhs);
}
}
void
octave_lvalue::set_index (const std::string& t,
const std::list<octave_value_list>& i)
{
if (idx.empty ())
{
type = t;
idx = i;
}
else
error ("invalid index expression in assignment");
}
void
octave_lvalue::do_unary_op (octave_value::unary_op op)
{
if (! is_black_hole ())
{
if (idx.empty ())
sym->do_non_const_unary_op (op);
else
sym->do_non_const_unary_op (op, type, idx);
}
}
octave_value
octave_lvalue::value (void) const
{
octave_value retval;
if (! is_black_hole ())
{
octave_value val = sym->varval ();
if (idx.empty ())
retval = val;
else
{
if (val.is_constant ())
retval = val.subsref (type, idx);
else
{
octave_value_list t = val.subsref (type, idx, 1);
if (t.length () > 0)
retval = t(0);
}
}
}
return retval;
}
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