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| 1 # C++ skeleton for Bison |
| 2 |
| 3 # Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, |
| 4 # Inc. |
| 5 |
| 6 # This program is free software: you can redistribute it and/or modify |
| 7 # it under the terms of the GNU General Public License as published by |
| 8 # the Free Software Foundation, either version 3 of the License, or |
| 9 # (at your option) any later version. |
| 10 # |
| 11 # This program is distributed in the hope that it will be useful, |
| 12 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 # GNU General Public License for more details. |
| 15 # |
| 16 # You should have received a copy of the GNU General Public License |
| 17 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 |
| 19 # We do want M4 expansion after # for CPP macros. |
| 20 m4_changecom() |
| 21 m4_divert_push(0)dnl |
| 22 @output(b4_dir_prefix[]position.hh@) |
| 23 b4_copyright([Positions for Bison parsers in C++], |
| 24 [2002, 2003, 2004, 2005, 2006])[ |
| 25 |
| 26 /** |
| 27 ** \file position.hh |
| 28 ** Define the ]b4_namespace_ref[::position class. |
| 29 */ |
| 30 |
| 31 #ifndef BISON_POSITION_HH |
| 32 # define BISON_POSITION_HH |
| 33 |
| 34 # include <iostream> |
| 35 # include <string> |
| 36 # include <algorithm> |
| 37 |
| 38 ]b4_namespace_open[ |
| 39 /// Abstract a position. |
| 40 class position |
| 41 { |
| 42 public: |
| 43 ]m4_ifdef([b4_location_constructors], [ |
| 44 /// Construct a position. |
| 45 position () |
| 46 : filename (0), line (]b4_location_initial_line[), column (]b4_location_in
itial_column[) |
| 47 { |
| 48 } |
| 49 |
| 50 ])[ |
| 51 /// Initialization. |
| 52 inline void initialize (]b4_percent_define_get([[filename_type]])[* fn) |
| 53 { |
| 54 filename = fn; |
| 55 line = ]b4_location_initial_line[; |
| 56 column = ]b4_location_initial_column[; |
| 57 } |
| 58 |
| 59 /** \name Line and Column related manipulators |
| 60 ** \{ */ |
| 61 public: |
| 62 /// (line related) Advance to the COUNT next lines. |
| 63 inline void lines (int count = 1) |
| 64 { |
| 65 column = ]b4_location_initial_column[; |
| 66 line += count; |
| 67 } |
| 68 |
| 69 /// (column related) Advance to the COUNT next columns. |
| 70 inline void columns (int count = 1) |
| 71 { |
| 72 column = std::max (]b4_location_initial_column[u, column + count); |
| 73 } |
| 74 /** \} */ |
| 75 |
| 76 public: |
| 77 /// File name to which this position refers. |
| 78 ]b4_percent_define_get([[filename_type]])[* filename; |
| 79 /// Current line number. |
| 80 unsigned int line; |
| 81 /// Current column number. |
| 82 unsigned int column; |
| 83 }; |
| 84 |
| 85 /// Add and assign a position. |
| 86 inline const position& |
| 87 operator+= (position& res, const int width) |
| 88 { |
| 89 res.columns (width); |
| 90 return res; |
| 91 } |
| 92 |
| 93 /// Add two position objects. |
| 94 inline const position |
| 95 operator+ (const position& begin, const int width) |
| 96 { |
| 97 position res = begin; |
| 98 return res += width; |
| 99 } |
| 100 |
| 101 /// Add and assign a position. |
| 102 inline const position& |
| 103 operator-= (position& res, const int width) |
| 104 { |
| 105 return res += -width; |
| 106 } |
| 107 |
| 108 /// Add two position objects. |
| 109 inline const position |
| 110 operator- (const position& begin, const int width) |
| 111 { |
| 112 return begin + -width; |
| 113 } |
| 114 ]b4_percent_define_flag_if([[define_location_comparison]], [[ |
| 115 /// Compare two position objects. |
| 116 inline bool |
| 117 operator== (const position& pos1, const position& pos2) |
| 118 { |
| 119 return |
| 120 (pos1.filename == pos2.filename |
| 121 || pos1.filename && pos2.filename && *pos1.filename == *pos2.filename) |
| 122 && pos1.line == pos2.line && pos1.column == pos2.column; |
| 123 } |
| 124 |
| 125 /// Compare two position objects. |
| 126 inline bool |
| 127 operator!= (const position& pos1, const position& pos2) |
| 128 { |
| 129 return !(pos1 == pos2); |
| 130 } |
| 131 ]])[ |
| 132 /** \brief Intercept output stream redirection. |
| 133 ** \param ostr the destination output stream |
| 134 ** \param pos a reference to the position to redirect |
| 135 */ |
| 136 inline std::ostream& |
| 137 operator<< (std::ostream& ostr, const position& pos) |
| 138 { |
| 139 if (pos.filename) |
| 140 ostr << *pos.filename << ':'; |
| 141 return ostr << pos.line << '.' << pos.column; |
| 142 } |
| 143 |
| 144 ]b4_namespace_close[ |
| 145 #endif // not BISON_POSITION_HH] |
| 146 @output(b4_dir_prefix[]location.hh@) |
| 147 b4_copyright([Locations for Bison parsers in C++], |
| 148 [2002, 2003, 2004, 2005, 2006])[ |
| 149 |
| 150 /** |
| 151 ** \file location.hh |
| 152 ** Define the ]b4_namespace_ref[::location class. |
| 153 */ |
| 154 |
| 155 #ifndef BISON_LOCATION_HH |
| 156 # define BISON_LOCATION_HH |
| 157 |
| 158 # include <iostream> |
| 159 # include <string> |
| 160 # include "position.hh" |
| 161 |
| 162 ]b4_namespace_open[ |
| 163 |
| 164 /// Abstract a location. |
| 165 class location |
| 166 { |
| 167 public: |
| 168 ]m4_ifdef([b4_location_constructors], [ |
| 169 /// Construct a location. |
| 170 location () |
| 171 : begin (), end () |
| 172 { |
| 173 } |
| 174 |
| 175 ])[ |
| 176 /// Initialization. |
| 177 inline void initialize (]b4_percent_define_get([[filename_type]])[* fn) |
| 178 { |
| 179 begin.initialize (fn); |
| 180 end = begin; |
| 181 } |
| 182 |
| 183 /** \name Line and Column related manipulators |
| 184 ** \{ */ |
| 185 public: |
| 186 /// Reset initial location to final location. |
| 187 inline void step () |
| 188 { |
| 189 begin = end; |
| 190 } |
| 191 |
| 192 /// Extend the current location to the COUNT next columns. |
| 193 inline void columns (unsigned int count = 1) |
| 194 { |
| 195 end += count; |
| 196 } |
| 197 |
| 198 /// Extend the current location to the COUNT next lines. |
| 199 inline void lines (unsigned int count = 1) |
| 200 { |
| 201 end.lines (count); |
| 202 } |
| 203 /** \} */ |
| 204 |
| 205 |
| 206 public: |
| 207 /// Beginning of the located region. |
| 208 position begin; |
| 209 /// End of the located region. |
| 210 position end; |
| 211 }; |
| 212 |
| 213 /// Join two location objects to create a location. |
| 214 inline const location operator+ (const location& begin, const location& end) |
| 215 { |
| 216 location res = begin; |
| 217 res.end = end.end; |
| 218 return res; |
| 219 } |
| 220 |
| 221 /// Add two location objects. |
| 222 inline const location operator+ (const location& begin, unsigned int width) |
| 223 { |
| 224 location res = begin; |
| 225 res.columns (width); |
| 226 return res; |
| 227 } |
| 228 |
| 229 /// Add and assign a location. |
| 230 inline location& operator+= (location& res, unsigned int width) |
| 231 { |
| 232 res.columns (width); |
| 233 return res; |
| 234 } |
| 235 ]b4_percent_define_flag_if([[define_location_comparison]], [[ |
| 236 /// Compare two location objects. |
| 237 inline bool |
| 238 operator== (const location& loc1, const location& loc2) |
| 239 { |
| 240 return loc1.begin == loc2.begin && loc1.end == loc2.end; |
| 241 } |
| 242 |
| 243 /// Compare two location objects. |
| 244 inline bool |
| 245 operator!= (const location& loc1, const location& loc2) |
| 246 { |
| 247 return !(loc1 == loc2); |
| 248 } |
| 249 ]])[ |
| 250 /** \brief Intercept output stream redirection. |
| 251 ** \param ostr the destination output stream |
| 252 ** \param loc a reference to the location to redirect |
| 253 ** |
| 254 ** Avoid duplicate information. |
| 255 */ |
| 256 inline std::ostream& operator<< (std::ostream& ostr, const location& loc) |
| 257 { |
| 258 position last = loc.end - 1; |
| 259 ostr << loc.begin; |
| 260 if (last.filename |
| 261 && (!loc.begin.filename |
| 262 || *loc.begin.filename != *last.filename)) |
| 263 ostr << '-' << last; |
| 264 else if (loc.begin.line != last.line) |
| 265 ostr << '-' << last.line << '.' << last.column; |
| 266 else if (loc.begin.column != last.column) |
| 267 ostr << '-' << last.column; |
| 268 return ostr; |
| 269 } |
| 270 |
| 271 ]b4_namespace_close[ |
| 272 |
| 273 #endif // not BISON_LOCATION_HH] |
| 274 m4_divert_pop(0) |
| 275 m4_changecom([#]) |
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