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1 /* A Bison parser, made by GNU Bison 2.3. */
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2
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3 /* Locations 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 location.hh
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37 ** Define the yy::location class.
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38 */
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39
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40 #ifndef BISON_LOCATION_HH
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41 # define BISON_LOCATION_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 # include "position.hh"
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46
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47 namespace yy
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48 {
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49
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50 /// Abstract a location.
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51 class location
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52 {
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53 public:
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54
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55 /// Construct a location.
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56 location ()
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57 : begin (), end ()
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58 {
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59 }
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60
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61
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62 /// Initialization.
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63 inline void initialize (std::string* fn)
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64 {
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65 begin.initialize (fn);
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66 end = begin;
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67 }
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68
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69 /** \name Line and Column related manipulators
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70 ** \{ */
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71 public:
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72 /// Reset initial location to final location.
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73 inline void step ()
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74 {
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75 begin = end;
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76 }
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77
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78 /// Extend the current location to the COUNT next columns.
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79 inline void columns (unsigned int count = 1)
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80 {
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81 end += count;
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82 }
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83
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84 /// Extend the current location to the COUNT next lines.
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85 inline void lines (unsigned int count = 1)
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86 {
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87 end.lines (count);
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88 }
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89 /** \} */
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90
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91
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92 public:
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93 /// Beginning of the located region.
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94 position begin;
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95 /// End of the located region.
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96 position end;
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97 };
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98
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99 /// Join two location objects to create a location.
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100 inline const location operator+ (const location& begin, const location& end)
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101 {
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102 location res = begin;
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103 res.end = end.end;
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104 return res;
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105 }
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106
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107 /// Add two location objects.
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108 inline const location operator+ (const location& begin, unsigned int width)
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109 {
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110 location res = begin;
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111 res.columns (width);
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112 return res;
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113 }
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114
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115 /// Add and assign a location.
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116 inline location& operator+= (location& res, unsigned int width)
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117 {
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118 res.columns (width);
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119 return res;
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120 }
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121
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122 /** \brief Intercept output stream redirection.
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123 ** \param ostr the destination output stream
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124 ** \param loc a reference to the location to redirect
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125 **
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126 ** Avoid duplicate information.
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127 */
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128 inline std::ostream& operator<< (std::ostream& ostr, const location& loc)
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129 {
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130 position last = loc.end - 1;
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131 ostr << loc.begin;
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132 if (last.filename
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133 && (!loc.begin.filename
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134 || *loc.begin.filename != *last.filename))
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135 ostr << '-' << last;
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136 else if (loc.begin.line != last.line)
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137 ostr << '-' << last.line << '.' << last.column;
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138 else if (loc.begin.column != last.column)
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139 ostr << '-' << last.column;
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140 return ostr;
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141 }
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142
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143 }
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144
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145 #endif // not BISON_LOCATION_HH
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