| 1 | # C++ skeleton for Bison |
| 2 | |
| 3 | # Copyright (C) 2002-2015 Free Software Foundation, Inc. |
| 4 | |
| 5 | # This program is free software: you can redistribute it and/or modify |
| 6 | # it under the terms of the GNU General Public License as published by |
| 7 | # the Free Software Foundation, either version 3 of the License, or |
| 8 | # (at your option) any later version. |
| 9 | # |
| 10 | # This program is distributed in the hope that it will be useful, |
| 11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | # GNU General Public License for more details. |
| 14 | # |
| 15 | # You should have received a copy of the GNU General Public License |
| 16 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | |
| 18 | m4_pushdef([b4_copyright_years], |
| 19 | [2002-2015]) |
| 20 | |
| 21 | # b4_position_define |
| 22 | # ------------------ |
| 23 | # Define class position. |
| 24 | m4_define([b4_position_define], |
| 25 | [[ /// Abstract a position. |
| 26 | class position |
| 27 | { |
| 28 | public:]m4_ifdef([b4_location_constructors], [[ |
| 29 | /// Construct a position. |
| 30 | explicit position (]b4_percent_define_get([[filename_type]])[* f = YY_NULLPTR, |
| 31 | unsigned int l = ]b4_location_initial_line[u, |
| 32 | unsigned int c = ]b4_location_initial_column[u) |
| 33 | : filename (f) |
| 34 | , line (l) |
| 35 | , column (c) |
| 36 | { |
| 37 | } |
| 38 | |
| 39 | ]])[ |
| 40 | /// Initialization. |
| 41 | void initialize (]b4_percent_define_get([[filename_type]])[* fn = YY_NULLPTR, |
| 42 | unsigned int l = ]b4_location_initial_line[u, |
| 43 | unsigned int c = ]b4_location_initial_column[u) |
| 44 | { |
| 45 | filename = fn; |
| 46 | line = l; |
| 47 | column = c; |
| 48 | } |
| 49 | |
| 50 | /** \name Line and Column related manipulators |
| 51 | ** \{ */ |
| 52 | /// (line related) Advance to the COUNT next lines. |
| 53 | void lines (int count = 1) |
| 54 | { |
| 55 | if (count) |
| 56 | { |
| 57 | column = ]b4_location_initial_column[u; |
| 58 | line = add_ (line, count, ]b4_location_initial_line[); |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | /// (column related) Advance to the COUNT next columns. |
| 63 | void columns (int count = 1) |
| 64 | { |
| 65 | column = add_ (column, count, ]b4_location_initial_column[); |
| 66 | } |
| 67 | /** \} */ |
| 68 | |
| 69 | /// File name to which this position refers. |
| 70 | ]b4_percent_define_get([[filename_type]])[* filename; |
| 71 | /// Current line number. |
| 72 | unsigned int line; |
| 73 | /// Current column number. |
| 74 | unsigned int column; |
| 75 | |
| 76 | private: |
| 77 | /// Compute max(min, lhs+rhs) (provided min <= lhs). |
| 78 | static unsigned int add_ (unsigned int lhs, int rhs, unsigned int min) |
| 79 | { |
| 80 | return (0 < rhs || -static_cast<unsigned int>(rhs) < lhs |
| 81 | ? rhs + lhs |
| 82 | : min); |
| 83 | } |
| 84 | }; |
| 85 | |
| 86 | /// Add \a width columns, in place. |
| 87 | inline position& |
| 88 | operator+= (position& res, int width) |
| 89 | { |
| 90 | res.columns (width); |
| 91 | return res; |
| 92 | } |
| 93 | |
| 94 | /// Add \a width columns. |
| 95 | inline position |
| 96 | operator+ (position res, int width) |
| 97 | { |
| 98 | return res += width; |
| 99 | } |
| 100 | |
| 101 | /// Subtract \a width columns, in place. |
| 102 | inline position& |
| 103 | operator-= (position& res, int width) |
| 104 | { |
| 105 | return res += -width; |
| 106 | } |
| 107 | |
| 108 | /// Subtract \a width columns. |
| 109 | inline position |
| 110 | operator- (position res, int width) |
| 111 | { |
| 112 | return res -= 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 (pos1.line == pos2.line |
| 120 | && pos1.column == pos2.column |
| 121 | && (pos1.filename == pos2.filename |
| 122 | || (pos1.filename && pos2.filename |
| 123 | && *pos1.filename == *pos2.filename))); |
| 124 | } |
| 125 | |
| 126 | /// Compare two position objects. |
| 127 | inline bool |
| 128 | operator!= (const position& pos1, const position& pos2) |
| 129 | { |
| 130 | return !(pos1 == pos2); |
| 131 | } |
| 132 | ]])[ |
| 133 | /** \brief Intercept output stream redirection. |
| 134 | ** \param ostr the destination output stream |
| 135 | ** \param pos a reference to the position to redirect |
| 136 | */ |
| 137 | template <typename YYChar> |
| 138 | inline std::basic_ostream<YYChar>& |
| 139 | operator<< (std::basic_ostream<YYChar>& ostr, const position& pos) |
| 140 | { |
| 141 | if (pos.filename) |
| 142 | ostr << *pos.filename << ':'; |
| 143 | return ostr << pos.line << '.' << pos.column; |
| 144 | } |
| 145 | ]]) |
| 146 | |
| 147 | |
| 148 | # b4_location_define |
| 149 | # ------------------ |
| 150 | m4_define([b4_location_define], |
| 151 | [[ /// Abstract a location. |
| 152 | class location |
| 153 | { |
| 154 | public: |
| 155 | ]m4_ifdef([b4_location_constructors], [ |
| 156 | /// Construct a location from \a b to \a e. |
| 157 | location (const position& b, const position& e) |
| 158 | : begin (b) |
| 159 | , end (e) |
| 160 | { |
| 161 | } |
| 162 | |
| 163 | /// Construct a 0-width location in \a p. |
| 164 | explicit location (const position& p = position ()) |
| 165 | : begin (p) |
| 166 | , end (p) |
| 167 | { |
| 168 | } |
| 169 | |
| 170 | /// Construct a 0-width location in \a f, \a l, \a c. |
| 171 | explicit location (]b4_percent_define_get([[filename_type]])[* f, |
| 172 | unsigned int l = ]b4_location_initial_line[u, |
| 173 | unsigned int c = ]b4_location_initial_column[u) |
| 174 | : begin (f, l, c) |
| 175 | , end (f, l, c) |
| 176 | { |
| 177 | } |
| 178 | |
| 179 | ])[ |
| 180 | /// Initialization. |
| 181 | void initialize (]b4_percent_define_get([[filename_type]])[* f = YY_NULLPTR, |
| 182 | unsigned int l = ]b4_location_initial_line[u, |
| 183 | unsigned int c = ]b4_location_initial_column[u) |
| 184 | { |
| 185 | begin.initialize (f, l, c); |
| 186 | end = begin; |
| 187 | } |
| 188 | |
| 189 | /** \name Line and Column related manipulators |
| 190 | ** \{ */ |
| 191 | public: |
| 192 | /// Reset initial location to final location. |
| 193 | void step () |
| 194 | { |
| 195 | begin = end; |
| 196 | } |
| 197 | |
| 198 | /// Extend the current location to the COUNT next columns. |
| 199 | void columns (int count = 1) |
| 200 | { |
| 201 | end += count; |
| 202 | } |
| 203 | |
| 204 | /// Extend the current location to the COUNT next lines. |
| 205 | void lines (int count = 1) |
| 206 | { |
| 207 | end.lines (count); |
| 208 | } |
| 209 | /** \} */ |
| 210 | |
| 211 | |
| 212 | public: |
| 213 | /// Beginning of the located region. |
| 214 | position begin; |
| 215 | /// End of the located region. |
| 216 | position end; |
| 217 | }; |
| 218 | |
| 219 | /// Join two locations, in place. |
| 220 | inline location& operator+= (location& res, const location& end) |
| 221 | { |
| 222 | res.end = end.end; |
| 223 | return res; |
| 224 | } |
| 225 | |
| 226 | /// Join two locations. |
| 227 | inline location operator+ (location res, const location& end) |
| 228 | { |
| 229 | return res += end; |
| 230 | } |
| 231 | |
| 232 | /// Add \a width columns to the end position, in place. |
| 233 | inline location& operator+= (location& res, int width) |
| 234 | { |
| 235 | res.columns (width); |
| 236 | return res; |
| 237 | } |
| 238 | |
| 239 | /// Add \a width columns to the end position. |
| 240 | inline location operator+ (location res, int width) |
| 241 | { |
| 242 | return res += width; |
| 243 | } |
| 244 | |
| 245 | /// Subtract \a width columns to the end position, in place. |
| 246 | inline location& operator-= (location& res, int width) |
| 247 | { |
| 248 | return res += -width; |
| 249 | } |
| 250 | |
| 251 | /// Subtract \a width columns to the end position. |
| 252 | inline location operator- (location res, int width) |
| 253 | { |
| 254 | return res -= width; |
| 255 | } |
| 256 | ]b4_percent_define_flag_if([[define_location_comparison]], [[ |
| 257 | /// Compare two location objects. |
| 258 | inline bool |
| 259 | operator== (const location& loc1, const location& loc2) |
| 260 | { |
| 261 | return loc1.begin == loc2.begin && loc1.end == loc2.end; |
| 262 | } |
| 263 | |
| 264 | /// Compare two location objects. |
| 265 | inline bool |
| 266 | operator!= (const location& loc1, const location& loc2) |
| 267 | { |
| 268 | return !(loc1 == loc2); |
| 269 | } |
| 270 | ]])[ |
| 271 | /** \brief Intercept output stream redirection. |
| 272 | ** \param ostr the destination output stream |
| 273 | ** \param loc a reference to the location to redirect |
| 274 | ** |
| 275 | ** Avoid duplicate information. |
| 276 | */ |
| 277 | template <typename YYChar> |
| 278 | inline std::basic_ostream<YYChar>& |
| 279 | operator<< (std::basic_ostream<YYChar>& ostr, const location& loc) |
| 280 | { |
| 281 | unsigned int end_col = 0 < loc.end.column ? loc.end.column - 1 : 0; |
| 282 | ostr << loc.begin; |
| 283 | if (loc.end.filename |
| 284 | && (!loc.begin.filename |
| 285 | || *loc.begin.filename != *loc.end.filename)) |
| 286 | ostr << '-' << loc.end.filename << ':' << loc.end.line << '.' << end_col; |
| 287 | else if (loc.begin.line < loc.end.line) |
| 288 | ostr << '-' << loc.end.line << '.' << end_col; |
| 289 | else if (loc.begin.column < end_col) |
| 290 | ostr << '-' << end_col; |
| 291 | return ostr; |
| 292 | } |
| 293 | ]]) |
| 294 | |
| 295 | |
| 296 | b4_defines_if([ |
| 297 | b4_output_begin([b4_dir_prefix[]position.hh]) |
| 298 | b4_copyright([Positions for Bison parsers in C++])[ |
| 299 | |
| 300 | /** |
| 301 | ** \file ]b4_dir_prefix[position.hh |
| 302 | ** Define the ]b4_namespace_ref[::position class. |
| 303 | */ |
| 304 | |
| 305 | ]b4_cpp_guard_open([b4_dir_prefix[]position.hh])[ |
| 306 | |
| 307 | # include <algorithm> // std::max |
| 308 | # include <iostream> |
| 309 | # include <string> |
| 310 | |
| 311 | ]b4_null_define[ |
| 312 | |
| 313 | ]b4_namespace_open[ |
| 314 | ]b4_position_define[ |
| 315 | ]b4_namespace_close[ |
| 316 | ]b4_cpp_guard_close([b4_dir_prefix[]position.hh]) |
| 317 | b4_output_end() |
| 318 | |
| 319 | |
| 320 | b4_output_begin([b4_dir_prefix[]location.hh]) |
| 321 | b4_copyright([Locations for Bison parsers in C++])[ |
| 322 | |
| 323 | /** |
| 324 | ** \file ]b4_dir_prefix[location.hh |
| 325 | ** Define the ]b4_namespace_ref[::location class. |
| 326 | */ |
| 327 | |
| 328 | ]b4_cpp_guard_open([b4_dir_prefix[]location.hh])[ |
| 329 | |
| 330 | # include "position.hh" |
| 331 | |
| 332 | ]b4_namespace_open[ |
| 333 | ]b4_location_define[ |
| 334 | ]b4_namespace_close[ |
| 335 | ]b4_cpp_guard_close([b4_dir_prefix[]location.hh]) |
| 336 | b4_output_end() |
| 337 | ]) |
| 338 | |
| 339 | |
| 340 | m4_popdef([b4_copyright_years]) |