00001 /* A Bison parser, made by GNU Bison 2.3. */ 00002 00003 /* Positions for Bison parsers in C++ 00004 00005 Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. 00006 00007 This program is free software; you can redistribute it and/or modify 00008 it under the terms of the GNU General Public License as published by 00009 the Free Software Foundation; either version 2, or (at your option) 00010 any later version. 00011 00012 This program is distributed in the hope that it will be useful, 00013 but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 GNU General Public License for more details. 00016 00017 You should have received a copy of the GNU General Public License 00018 along with this program; if not, write to the Free Software 00019 Foundation, Inc., 51 Franklin Street, Fifth Floor, 00020 Boston, MA 02110-1301, USA. */ 00021 00022 /* As a special exception, you may create a larger work that contains 00023 part or all of the Bison parser skeleton and distribute that work 00024 under terms of your choice, so long as that work isn't itself a 00025 parser generator using the skeleton or a modified version thereof 00026 as a parser skeleton. Alternatively, if you modify or redistribute 00027 the parser skeleton itself, you may (at your option) remove this 00028 special exception, which will cause the skeleton and the resulting 00029 Bison output files to be licensed under the GNU General Public 00030 License without this special exception. 00031 00032 This special exception was added by the Free Software Foundation in 00033 version 2.2 of Bison. */ 00034 00035 /** 00036 ** \file position.hh 00037 ** Define the nmt::position class. 00038 */ 00039 00040 #ifndef BISON_POSITION_HH 00041 # define BISON_POSITION_HH 00042 00043 # include <iostream> 00044 # include <string> 00045 00046 namespace torc 00047 { 00048 /// Abstract a position. 00049 class position 00050 { 00051 public: 00052 00053 /// Construct a position. 00054 position () 00055 : filename (0), line (1), column (0) 00056 { 00057 } 00058 00059 00060 /// Initialization. 00061 inline void initialize (std::string* fn) 00062 { 00063 filename = fn; 00064 line = 1; 00065 column = 0; 00066 } 00067 00068 /** \name Line and Column related manipulators 00069 ** \{ */ 00070 public: 00071 /// (line related) Advance to the COUNT next lines. 00072 inline void lines (int count = 1) 00073 { 00074 column = 0; 00075 line += count; 00076 } 00077 00078 /// (column related) Advance to the COUNT next columns. 00079 inline void columns (int count = 1) 00080 { 00081 int leftmost = 0; 00082 int current = column; 00083 if (leftmost <= current + count) 00084 column += count; 00085 else 00086 column = 0; 00087 } 00088 /** \} */ 00089 00090 public: 00091 /// File name to which this position refers. 00092 std::string* filename; 00093 /// Current line number. 00094 unsigned int line; 00095 /// Current column number. 00096 unsigned int column; 00097 }; 00098 00099 /// Add and assign a position. 00100 inline const position& 00101 operator+= (position& res, const int width) 00102 { 00103 res.columns (width); 00104 return res; 00105 } 00106 00107 /// Add two position objects. 00108 inline const position 00109 operator+ (const position& begin, const int width) 00110 { 00111 position res = begin; 00112 return res += width; 00113 } 00114 00115 /// Add and assign a position. 00116 inline const position& 00117 operator-= (position& res, const int width) 00118 { 00119 return res += -width; 00120 } 00121 00122 /// Add two position objects. 00123 inline const position 00124 operator- (const position& begin, const int width) 00125 { 00126 return begin + -width; 00127 } 00128 00129 /** \brief Intercept output stream redirection. 00130 ** \param ostr the destination output stream 00131 ** \param pos a reference to the position to redirect 00132 */ 00133 inline std::ostream& 00134 operator<< (std::ostream& ostr, const position& pos) 00135 { 00136 if (pos.filename) 00137 ostr << *pos.filename << ':'; 00138 return ostr << pos.line << '.' << pos.column; 00139 } 00140 00141 } 00142 #endif // not BISON_POSITION_HH
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