1 m4_divert(-1) 2 3 # C++ skeleton for Bison 4 5 # Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. 6 7 # This program is free software; you can redistribute it and/or modify 8 # it under the terms of the GNU General Public License as published by 9 # the Free Software Foundation; either version 2 of the License, or 10 # (at your option) any later version. 11 12 # This program is distributed in the hope that it will be useful, 13 # but WITHOUT ANY WARRANTY; without even the implied warranty of 14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 # GNU General Public License for more details. 16 17 # You should have received a copy of the GNU General Public License 18 # along with this program; if not, write to the Free Software 19 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 20 # 02110-1301 USA 21 22 # We do want M4 expansion after # for CPP macros. 23 m4_changecom() 24 m4_divert(0)dnl 25 @output b4_dir_prefix[]position.hh 26 b4_copyright([Positions for Bison parsers in C++], 27 [2002, 2003, 2004, 2005, 2006])[ 28 29 /** 30 ** \file position.hh 31 ** Define the ]b4_namespace[::position class. 32 */ 33 34 #ifndef BISON_POSITION_HH 35 # define BISON_POSITION_HH 36 37 # include <iostream> 38 # include <string> 39 40 namespace ]b4_namespace[ 41 { 42 /// Abstract a position. 43 class position 44 { 45 public: 46 ]m4_ifdef([b4_location_constructors], [ 47 /// Construct a position. 48 position () 49 : filename (0), line (1), column (0) 50 { 51 } 52 53 ])[ 54 /// Initialization. 55 inline void initialize (]b4_filename_type[* fn) 56 { 57 filename = fn; 58 line = 1; 59 column = 0; 60 } 61 62 /** \name Line and Column related manipulators 63 ** \{ */ 64 public: 65 /// (line related) Advance to the COUNT next lines. 66 inline void lines (int count = 1) 67 { 68 column = 0; 69 line += count; 70 } 71 72 /// (column related) Advance to the COUNT next columns. 73 inline void columns (int count = 1) 74 { 75 int leftmost = 0; 76 int current = column; 77 if (leftmost <= current + count) 78 column += count; 79 else 80 column = 0; 81 } 82 /** \} */ 83 84 public: 85 /// File name to which this position refers. 86 ]b4_filename_type[* filename; 87 /// Current line number. 88 unsigned int line; 89 /// Current column number. 90 unsigned int column; 91 }; 92 93 /// Add and assign a position. 94 inline const position& 95 operator+= (position& res, const int width) 96 { 97 res.columns (width); 98 return res; 99 } 100 101 /// Add two position objects. 102 inline const position 103 operator+ (const position& begin, const int width) 104 { 105 position res = begin; 106 return res += width; 107 } 108 109 /// Add and assign a position. 110 inline const position& 111 operator-= (position& res, const int width) 112 { 113 return res += -width; 114 } 115 116 /// Add two position objects. 117 inline const position 118 operator- (const position& begin, const int width) 119 { 120 return begin + -width; 121 } 122 123 /** \brief Intercept output stream redirection. 124 ** \param ostr the destination output stream 125 ** \param pos a reference to the position to redirect 126 */ 127 inline std::ostream& 128 operator<< (std::ostream& ostr, const position& pos) 129 { 130 if (pos.filename) 131 ostr << *pos.filename << ':'; 132 return ostr << pos.line << '.' << pos.column; 133 } 134 135 } 136 #endif // not BISON_POSITION_HH] 137 @output b4_dir_prefix[]location.hh 138 b4_copyright([Locations for Bison parsers in C++], 139 [2002, 2003, 2004, 2005, 2006])[ 140 141 /** 142 ** \file location.hh 143 ** Define the ]b4_namespace[::location class. 144 */ 145 146 #ifndef BISON_LOCATION_HH 147 # define BISON_LOCATION_HH 148 149 # include <iostream> 150 # include <string> 151 # include "position.hh" 152 153 namespace ]b4_namespace[ 154 { 155 156 /// Abstract a location. 157 class location 158 { 159 public: 160 ]m4_ifdef([b4_location_constructors], [ 161 /// Construct a location. 162 location () 163 : begin (), end () 164 { 165 } 166 167 ])[ 168 /// Initialization. 169 inline void initialize (]b4_filename_type[* fn) 170 { 171 begin.initialize (fn); 172 end = begin; 173 } 174 175 /** \name Line and Column related manipulators 176 ** \{ */ 177 public: 178 /// Reset initial location to final location. 179 inline void step () 180 { 181 begin = end; 182 } 183 184 /// Extend the current location to the COUNT next columns. 185 inline void columns (unsigned int count = 1) 186 { 187 end += count; 188 } 189 190 /// Extend the current location to the COUNT next lines. 191 inline void lines (unsigned int count = 1) 192 { 193 end.lines (count); 194 } 195 /** \} */ 196 197 198 public: 199 /// Beginning of the located region. 200 position begin; 201 /// End of the located region. 202 position end; 203 }; 204 205 /// Join two location objects to create a location. 206 inline const location operator+ (const location& begin, const location& end) 207 { 208 location res = begin; 209 res.end = end.end; 210 return res; 211 } 212 213 /// Add two location objects. 214 inline const location operator+ (const location& begin, unsigned int width) 215 { 216 location res = begin; 217 res.columns (width); 218 return res; 219 } 220 221 /// Add and assign a location. 222 inline location& operator+= (location& res, unsigned int width) 223 { 224 res.columns (width); 225 return res; 226 } 227 228 /** \brief Intercept output stream redirection. 229 ** \param ostr the destination output stream 230 ** \param loc a reference to the location to redirect 231 ** 232 ** Avoid duplicate information. 233 */ 234 inline std::ostream& operator<< (std::ostream& ostr, const location& loc) 235 { 236 position last = loc.end - 1; 237 ostr << loc.begin; 238 if (last.filename 239 && (!loc.begin.filename 240 || *loc.begin.filename != *last.filename)) 241 ostr << '-' << last; 242 else if (loc.begin.line != last.line) 243 ostr << '-' << last.line << '.' << last.column; 244 else if (loc.begin.column != last.column) 245 ostr << '-' << last.column; 246 return ostr; 247 } 248 249 } 250 251 #endif // not BISON_LOCATION_HH] 252 m4_divert(-1) 253 m4_changecom([#]) 254
