/usr/include/octave-4.0.0/octave/ov-null-mat.h is in liboctave-dev 4.0.0-3ubuntu9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 | /*
Copyright (C) 2008-2015 Jaroslav Hajek
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/>.
*/
#if !defined (octave_ov_null_mat_h)
#define octave_ov_null_mat_h 1
#include "ov.h"
#include "ov-re-mat.h"
#include "ov-str-mat.h"
// Design rationale:
// The constructors are hidden. There is only one null matrix (or null string)
// object, that can have shallow copies. Cloning the object returns just a
// normal empty matrix, so all the shallow copies are, in fact, read-only. This
// conveniently ensures that any attempt to fiddle with the null matrix
// destroys its special status.
// The special [] value.
class
OCTINTERP_API
octave_null_matrix : public octave_matrix
{
octave_null_matrix (void) : octave_matrix () { }
public:
static const octave_value instance;
bool is_null_value (void) const { return true; }
type_conv_info numeric_conversion_function (void) const;
private:
DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA
};
// The special "" value
class
OCTINTERP_API
octave_null_str : public octave_char_matrix_str
{
octave_null_str (void) : octave_char_matrix_str () { }
public:
static const octave_value instance;
bool is_null_value (void) const { return true; }
type_conv_info numeric_conversion_function (void) const;
private:
DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA
};
// The special '' value
class
OCTINTERP_API
octave_null_sq_str : public octave_char_matrix_sq_str
{
octave_null_sq_str (void) : octave_char_matrix_sq_str () { }
public:
static const octave_value instance;
bool is_null_value (void) const { return true; }
type_conv_info numeric_conversion_function (void) const;
private:
DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA
};
#endif
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