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annotate libinterp/parse-tree/filepos.h @ 30131:a471bf0f78ba

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allow for invalid filepos objects * filepos.h (filepos::filepos (int, int)): Don't provide default values. (filepos::filepos (void)): Initialize to invalid line and column positions. (filepos::operator bool): New function. (filepos::set): Delete. * lex.h (lexical_feedback::lexical_feedback): Initialize filepos with line and column == 1. * lex.ll (lexical_feedback::reset): Set m_filepos to (1, 1).
author John W. Eaton <jwe@octave.org>
date Sat, 04 Sep 2021 07:50:08 -0400
parents 0a5b15007766
children 796f54d4ddbf
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2019-2021 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 (octave_filepos_h)
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27 #define octave_filepos_h 1
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28
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29 #include "octave-config.h"
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30
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31 namespace octave
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32 {
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33 class filepos
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34 {
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35 public:
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36
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37 filepos (void) : m_line (0), m_column (0) { }
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38
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39 filepos (int l, int c) : m_line (l), m_column (c) { }
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40
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41 filepos (const filepos&) = default;
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42
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43 filepos& operator = (const filepos&) = default;
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44
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45 ~filepos (void) = default;
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46
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47 operator bool () { return m_line > 0 && m_column > 0; }
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48
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49 void line (int l) { m_line = l; }
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50 void column (int c) { m_column = c; }
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51
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52 int line (void) const { return m_line; }
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53 int column (void) const { return m_column; }
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54
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55 void increment_line (int val = 1) { m_line += val; }
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56 void increment_column (int val = 1) { m_column += val; }
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57
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58 void decrement_line (int val = 1) { m_line -= val; }
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59 void decrement_column (int val = 1) { m_column -= val; }
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60
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61 void next_line (void)
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62 {
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63 m_line++;
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64 m_column = 1;
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65 }
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66
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67 private:
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68
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69 int m_line;
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70 int m_column;
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71 };
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72 }
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73
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74 #endif