Mercurial > octave
view libinterp/octave-value/ov-null-mat.h @ 27919:1891570abac8
update Octave Project Developers copyright for the new year
In files that have the "Octave Project Developers" copyright notice,
update for 2020.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 06 Jan 2020 22:29:51 -0500 |
parents | b442ec6dda5c |
children | bd51beb6205e |
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/* Copyright (C) 2008-2020 The Octave Project Developers See the file COPYRIGHT.md in the top-level directory of this distribution or <https://octave.org/COPYRIGHT.html/>. 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 <https://www.gnu.org/licenses/>. */ #if ! defined (octave_ov_null_mat_h) #define octave_ov_null_mat_h 1 #include "octave-config.h" #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 isnull (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 isnull (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 isnull (void) const { return true; } type_conv_info numeric_conversion_function (void) const; private: DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA }; #endif