1 /* A Bison parser, made by GNU Bison 2.3. */ 2 3 /* Positions for Bison parsers in C++ 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, or (at your option) 10 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, 20 Boston, MA 02110-1301, USA. */ 21 22 /* As a special exception, you may create a larger work that contains 23 part or all of the Bison parser skeleton and distribute that work 24 under terms of your choice, so long as that work isn't itself a 25 parser generator using the skeleton or a modified version thereof 26 as a parser skeleton. Alternatively, if you modify or redistribute 27 the parser skeleton itself, you may (at your option) remove this 28 special exception, which will cause the skeleton and the resulting 29 Bison output files to be licensed under the GNU General Public 30 License without this special exception. 31 32 This special exception was added by the Free Software Foundation in 33 version 2.2 of Bison. */ 34 35 /** 36 ** \file position.hh 37 ** Define the yy::position class. 38 */ 39 40 #ifndef BISON_POSITION_HH 41 # define BISON_POSITION_HH 42 43 # include <iostream> 44 # include <string> 45 46 namespace yy 47 { 48 /// Abstract a position. 49 class position 50 { 51 public: 52 53 /// Construct a position. position()54 position () 55 : filename (0), line (1), column (0) 56 { 57 } 58 59 60 /// Initialization. initialize(std::string * fn)61 inline void initialize (std::string* fn) 62 { 63 filename = fn; 64 line = 1; 65 column = 0; 66 } 67 68 /** \name Line and Column related manipulators 69 ** \{ */ 70 public: 71 /// (line related) Advance to the COUNT next lines. lines(int count=1)72 inline void lines (int count = 1) 73 { 74 column = 0; 75 line += count; 76 } 77 78 /// (column related) Advance to the COUNT next columns. columns(int count=1)79 inline void columns (int count = 1) 80 { 81 int leftmost = 0; 82 int current = column; 83 if (leftmost <= current + count) 84 column += count; 85 else 86 column = 0; 87 } 88 /** \} */ 89 90 public: 91 /// File name to which this position refers. 92 std::string* filename; 93 /// Current line number. 94 unsigned int line; 95 /// Current column number. 96 unsigned int column; 97 }; 98 99 /// Add and assign a position. 100 inline const position& operator +=(position & res,const int width)101 operator+= (position& res, const int width) 102 { 103 res.columns (width); 104 return res; 105 } 106 107 /// Add two position objects. 108 inline const position operator +(const position & begin,const int width)109 operator+ (const position& begin, const int width) 110 { 111 position res = begin; 112 return res += width; 113 } 114 115 /// Add and assign a position. 116 inline const position& operator -=(position & res,const int width)117 operator-= (position& res, const int width) 118 { 119 return res += -width; 120 } 121 122 /// Add two position objects. 123 inline const position operator -(const position & begin,const int width)124 operator- (const position& begin, const int width) 125 { 126 return begin + -width; 127 } 128 129 /** \brief Intercept output stream redirection. 130 ** \param ostr the destination output stream 131 ** \param pos a reference to the position to redirect 132 */ operator <<(std::ostream & ostr,const position & pos)133 inline std::ostream& operator<< (std::ostream& ostr, const position& pos) 134 { 135 if (pos.filename) { 136 ostr << (*pos.filename).c_str(); 137 ostr << ':'; 138 } 139 return ostr << pos.line << '.' << pos.column; 140 } 141 } 142 143 #endif // not BISON_POSITION_HH 144