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1 /* A Bison parser, made by GNU Bison 2.3. */ |
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2 |
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3 /* Positions for Bison parsers in C++ |
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4 |
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5 Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. |
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6 |
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7 This program is free software; you can redistribute it and/or modify |
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8 it under the terms of the GNU General Public License as published by |
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9 the Free Software Foundation; either version 2, or (at your option) |
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10 any later version. |
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11 |
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12 This program is distributed in the hope that it will be useful, |
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 GNU General Public License for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with this program; if not, write to the Free Software |
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19 Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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20 Boston, MA 02110-1301, USA. */ |
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21 |
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22 /* As a special exception, you may create a larger work that contains |
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23 part or all of the Bison parser skeleton and distribute that work |
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24 under terms of your choice, so long as that work isn't itself a |
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25 parser generator using the skeleton or a modified version thereof |
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26 as a parser skeleton. Alternatively, if you modify or redistribute |
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27 the parser skeleton itself, you may (at your option) remove this |
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28 special exception, which will cause the skeleton and the resulting |
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29 Bison output files to be licensed under the GNU General Public |
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30 License without this special exception. |
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31 |
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32 This special exception was added by the Free Software Foundation in |
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33 version 2.2 of Bison. */ |
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34 |
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35 /** |
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36 ** \file position.hh |
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37 ** Define the yy::position class. |
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38 */ |
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39 |
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40 #ifndef BISON_POSITION_HH |
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41 # define BISON_POSITION_HH |
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42 |
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43 # include <iostream> |
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44 # include <string> |
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45 |
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46 namespace yy |
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47 { |
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48 /// Abstract a position. |
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49 class position |
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50 { |
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51 public: |
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52 |
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53 /// Construct a position. |
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54 position () |
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55 : filename (0), line (1), column (0) |
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56 { |
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57 } |
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58 |
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59 |
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60 /// Initialization. |
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61 inline void initialize (std::string* fn) |
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62 { |
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63 filename = fn; |
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64 line = 1; |
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65 column = 0; |
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66 } |
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67 |
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68 /** \name Line and Column related manipulators |
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69 ** \{ */ |
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70 public: |
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71 /// (line related) Advance to the COUNT next lines. |
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72 inline void lines (int count = 1) |
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73 { |
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74 column = 0; |
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75 line += count; |
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76 } |
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77 |
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78 /// (column related) Advance to the COUNT next columns. |
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79 inline void columns (int count = 1) |
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80 { |
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81 int leftmost = 0; |
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82 int current = column; |
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83 if (leftmost <= current + count) |
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84 column += count; |
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85 else |
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86 column = 0; |
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87 } |
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88 /** \} */ |
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89 |
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90 public: |
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91 /// File name to which this position refers. |
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92 std::string* filename; |
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93 /// Current line number. |
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94 unsigned int line; |
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95 /// Current column number. |
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96 unsigned int column; |
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97 }; |
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98 |
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99 /// Add and assign a position. |
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100 inline const position& |
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101 operator+= (position& res, const int width) |
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102 { |
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103 res.columns (width); |
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104 return res; |
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105 } |
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106 |
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107 /// Add two position objects. |
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108 inline const position |
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109 operator+ (const position& begin, const int width) |
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110 { |
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111 position res = begin; |
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112 return res += width; |
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113 } |
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114 |
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115 /// Add and assign a position. |
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116 inline const position& |
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117 operator-= (position& res, const int width) |
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118 { |
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119 return res += -width; |
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120 } |
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121 |
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122 /// Add two position objects. |
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123 inline const position |
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124 operator- (const position& begin, const int width) |
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125 { |
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126 return begin + -width; |
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127 } |
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128 |
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129 /** \brief Intercept output stream redirection. |
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130 ** \param ostr the destination output stream |
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131 ** \param pos a reference to the position to redirect |
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132 */ |
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133 inline std::ostream& |
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134 operator<< (std::ostream& ostr, const position& pos) |
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135 { |
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136 if (pos.filename) |
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137 ostr << *pos.filename << ':'; |
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138 return ostr << pos.line << '.' << pos.column; |
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139 } |
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140 |
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141 } |
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142 #endif // not BISON_POSITION_HH |