annotate libinterp/parse-tree/oct-lvalue.cc @ 27923:bd51beb6205e

update formatting of copyright notices * Use <https://octave.org/copyright/> instead of <https://octave.org/COPYRIGHT.html/>. * For consistency with other comments in the Octave sources, use C++-style comments for copyright blocks in C and C++ files. * Use delimiters above and below copyright blocks that are appropriate for the language used in the file. * Eliminate extra spacing inside copyright blocks. * lex.ll (looks_like_copyright): Also allow newlines and carriage returns before the word "Copyright". * scripts/mk-doc.pl (gethelp): Also skip empty comment lines. * bp-table.cc, type.m: Adjust tests.
author John W. Eaton <jwe@octave.org>
date Wed, 08 Jan 2020 11:59:41 -0500
parents 1891570abac8
children 56c209ff0a08
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1996-2020 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if defined (HAVE_CONFIG_H)
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27 # include "config.h"
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28 #endif
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30 #include "error.h"
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31 #include "ovl.h"
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32 #include "oct-lvalue.h"
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33 #include "ov.h"
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34
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35 namespace octave
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36 {
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37 bool octave_lvalue::is_defined (void) const
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38 {
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39 return ! is_black_hole () && m_frame.is_defined (m_sym);
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40 }
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41
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42 bool octave_lvalue::is_undefined (void) const
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43 {
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44 return ! is_defined ();
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45 }
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46
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47 void octave_lvalue::define (const octave_value& v)
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48 {
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49 m_frame.assign (m_sym, v);
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50 }
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51
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52 void octave_lvalue::assign (octave_value::assign_op op,
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53 const octave_value& rhs)
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54 {
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55 if (! is_black_hole ())
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56 m_frame.assign (op, m_sym, m_type, m_idx, rhs);
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57 }
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58
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59 void octave_lvalue::set_index (const std::string& t,
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60 const std::list<octave_value_list>& i)
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61 {
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62 if (! m_idx.empty ())
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63 error ("invalid index expression in assignment");
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64
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65 m_type = t;
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66 m_idx = i;
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67 }
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68
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69 bool octave_lvalue::index_is_empty (void) const
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70 {
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71 bool retval = false;
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72
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73 if (m_idx.size () == 1)
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74 {
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75 octave_value_list tmp = m_idx.front ();
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76
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77 retval = (tmp.length () == 1 && tmp(0).isempty ());
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78 }
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79
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80 return retval;
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81 }
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82
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83 void octave_lvalue::do_unary_op (octave_value::unary_op op)
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84 {
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85 if (! is_black_hole ())
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86 m_frame.do_non_const_unary_op (op, m_sym, m_type, m_idx);
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87 }
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88
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89 octave_value octave_lvalue::value (void) const
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90 {
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91 return (is_black_hole ()
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92 ? octave_value () : m_frame.value (m_sym, m_type, m_idx));
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93 }
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94 }