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143 lines
3.6 KiB
143 lines
3.6 KiB
/* A Bison parser, made by GNU Bison 2.3. */
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/* Positions for Bison parsers in C++
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Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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/* As a special exception, you may create a larger work that contains
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part or all of the Bison parser skeleton and distribute that work
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under terms of your choice, so long as that work isn't itself a
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parser generator using the skeleton or a modified version thereof
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as a parser skeleton. Alternatively, if you modify or redistribute
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the parser skeleton itself, you may (at your option) remove this
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special exception, which will cause the skeleton and the resulting
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Bison output files to be licensed under the GNU General Public
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License without this special exception.
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This special exception was added by the Free Software Foundation in
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version 2.2 of Bison. */
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/**
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** \file position.h
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** Define the TQMake::position class.
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*/
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#ifndef BISON_POSITION_H
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# define BISON_POSITION_H
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# include <iostream>
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# include <string>
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namespace TQMake
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{
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/// Abstract a position.
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class position
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{
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public:
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/// Construct a position.
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position ()
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: filename (0), line (1), column (0)
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{
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}
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/// Initialization.
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inline void initialize (std::string* fn)
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{
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filename = fn;
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line = 1;
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column = 0;
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}
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/** \name Line and Column related manipulators
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** \{ */
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public:
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/// (line related) Advance to the COUNT next lines.
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inline void lines (int count = 1)
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{
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column = 0;
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line += count;
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}
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/// (column related) Advance to the COUNT next columns.
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inline void columns (int count = 1)
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{
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int leftmost = 0;
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int current = column;
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if (leftmost <= current + count)
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column += count;
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else
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column = 0;
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}
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/** \} */
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public:
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/// File name to which this position refers.
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std::string* filename;
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/// Current line number.
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unsigned int line;
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/// Current column number.
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unsigned int column;
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};
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/// Add and assign a position.
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inline const position&
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operator+= (position& res, const int width)
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{
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res.columns (width);
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return res;
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}
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/// Add two position objects.
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inline const position
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operator+ (const position& begin, const int width)
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{
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position res = begin;
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return res += width;
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}
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/// Add and assign a position.
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inline const position&
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operator-= (position& res, const int width)
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{
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return res += -width;
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}
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/// Add two position objects.
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inline const position
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operator- (const position& begin, const int width)
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{
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return begin + -width;
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}
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/** \brief Intercept output stream redirection.
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** \param ostr the destination output stream
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** \param pos a reference to the position to redirect
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*/
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inline std::ostream&
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operator<< (std::ostream& ostr, const position& pos)
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{
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if (pos.filename)
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ostr << *pos.filename << ':';
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return ostr << pos.line << '.' << pos.column;
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}
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}
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#endif // not BISON_POSITION_H
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