pt-cell.cc

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////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 1999-2021 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// 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.
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
// along with Octave; see the file COPYING.  If not, see
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////////////////////////////////////////////////////////////////////////
 
#if defined (HAVE_CONFIG_H)
#  include "config.h"
#endif
 
#include "Cell.h"
#include "ovl.h"
#include "pt-arg-list.h"
#include "pt-eval.h"
#include "pt-exp.h"
#include "pt-cell.h"
#include "pt-walk.h"
#include "ov.h"
 
namespace octave
{
  tree_expression *
  tree_cell::dup (symbol_scope& scope) const
  {
    tree_cell *new_cell = new tree_cell (nullptr, line (), column ());
 
    new_cell->copy_base (*this, scope);
 
    return new_cell;
  }
 
  octave_value
  tree_cell::evaluate (tree_evaluator& tw, int)
  {
    unwind_action act ([&tw] (const std::list<octave_lvalue> *lvl)
                       {
                         tw.set_lvalue_list (lvl);
                       }, tw.lvalue_list ());
    tw.set_lvalue_list (nullptr);
 
    octave_idx_type nr = length ();
    octave_idx_type nc = -1;
 
    Cell val;
 
    octave_idx_type i = 0;
 
    for (tree_argument_list *elt : *this)
      {
        octave_value_list row = tw.convert_to_const_vector (elt);
 
        if (nr == 1)
          // Optimize the single row case.
          val = row.cell_value ();
        else if (nc < 0)
          {
            nc = row.length ();
 
            val = Cell (nr, nc);
          }
        else
          {
            octave_idx_type this_nc = row.length ();
 
            if (this_nc != nc)
              {
                if (this_nc == 0)
                  continue;  // blank line
                else
                  error ("number of columns must match");
              }
          }
 
        for (octave_idx_type j = 0; j < nc; j++)
          val(i,j) = row(j);
 
        i++;
      }
 
    if (i < nr)
      val.resize (dim_vector (i, nc));  // there were blank rows
 
    return octave_value (val);
  }
}