| # C++ skeleton for Bison |
| |
| # Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, |
| # Inc. |
| |
| # This program is free software: you can redistribute it and/or modify |
| # it under the terms of the GNU General Public License as published by |
| # the Free Software Foundation, either version 3 of the License, or |
| # (at your option) any later version. |
| # |
| # This program is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License |
| # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| |
| # We do want M4 expansion after # for CPP macros. |
| m4_changecom() |
| m4_divert_push(0)dnl |
| @output(b4_dir_prefix[]position.hh@) |
| b4_copyright([Positions for Bison parsers in C++], |
| [2002, 2003, 2004, 2005, 2006])[ |
| |
| /** |
| ** \file position.hh |
| ** Define the ]b4_namespace_ref[::position class. |
| */ |
| |
| #ifndef BISON_POSITION_HH |
| # define BISON_POSITION_HH |
| |
| # include <iostream> |
| # include <string> |
| # include <algorithm> |
| |
| ]b4_namespace_open[ |
| /// Abstract a position. |
| class position |
| { |
| public: |
| ]m4_ifdef([b4_location_constructors], [ |
| /// Construct a position. |
| position () |
| : filename (0), line (]b4_location_initial_line[), column (]b4_location_initial_column[) |
| { |
| } |
| |
| ])[ |
| /// Initialization. |
| inline void initialize (]b4_percent_define_get([[filename_type]])[* fn) |
| { |
| filename = fn; |
| line = ]b4_location_initial_line[; |
| column = ]b4_location_initial_column[; |
| } |
| |
| /** \name Line and Column related manipulators |
| ** \{ */ |
| public: |
| /// (line related) Advance to the COUNT next lines. |
| inline void lines (int count = 1) |
| { |
| column = ]b4_location_initial_column[; |
| line += count; |
| } |
| |
| /// (column related) Advance to the COUNT next columns. |
| inline void columns (int count = 1) |
| { |
| column = std::max (]b4_location_initial_column[u, column + count); |
| } |
| /** \} */ |
| |
| public: |
| /// File name to which this position refers. |
| ]b4_percent_define_get([[filename_type]])[* filename; |
| /// Current line number. |
| unsigned int line; |
| /// Current column number. |
| unsigned int column; |
| }; |
| |
| /// Add and assign a position. |
| inline const position& |
| operator+= (position& res, const int width) |
| { |
| res.columns (width); |
| return res; |
| } |
| |
| /// Add two position objects. |
| inline const position |
| operator+ (const position& begin, const int width) |
| { |
| position res = begin; |
| return res += width; |
| } |
| |
| /// Add and assign a position. |
| inline const position& |
| operator-= (position& res, const int width) |
| { |
| return res += -width; |
| } |
| |
| /// Add two position objects. |
| inline const position |
| operator- (const position& begin, const int width) |
| { |
| return begin + -width; |
| } |
| ]b4_percent_define_flag_if([[define_location_comparison]], [[ |
| /// Compare two position objects. |
| inline bool |
| operator== (const position& pos1, const position& pos2) |
| { |
| return |
| (pos1.filename == pos2.filename |
| || pos1.filename && pos2.filename && *pos1.filename == *pos2.filename) |
| && pos1.line == pos2.line && pos1.column == pos2.column; |
| } |
| |
| /// Compare two position objects. |
| inline bool |
| operator!= (const position& pos1, const position& pos2) |
| { |
| return !(pos1 == pos2); |
| } |
| ]])[ |
| /** \brief Intercept output stream redirection. |
| ** \param ostr the destination output stream |
| ** \param pos a reference to the position to redirect |
| */ |
| inline std::ostream& |
| operator<< (std::ostream& ostr, const position& pos) |
| { |
| if (pos.filename) |
| ostr << *pos.filename << ':'; |
| return ostr << pos.line << '.' << pos.column; |
| } |
| |
| ]b4_namespace_close[ |
| #endif // not BISON_POSITION_HH] |
| @output(b4_dir_prefix[]location.hh@) |
| b4_copyright([Locations for Bison parsers in C++], |
| [2002, 2003, 2004, 2005, 2006])[ |
| |
| /** |
| ** \file location.hh |
| ** Define the ]b4_namespace_ref[::location class. |
| */ |
| |
| #ifndef BISON_LOCATION_HH |
| # define BISON_LOCATION_HH |
| |
| # include <iostream> |
| # include <string> |
| # include "position.hh" |
| |
| ]b4_namespace_open[ |
| |
| /// Abstract a location. |
| class location |
| { |
| public: |
| ]m4_ifdef([b4_location_constructors], [ |
| /// Construct a location. |
| location () |
| : begin (), end () |
| { |
| } |
| |
| ])[ |
| /// Initialization. |
| inline void initialize (]b4_percent_define_get([[filename_type]])[* fn) |
| { |
| begin.initialize (fn); |
| end = begin; |
| } |
| |
| /** \name Line and Column related manipulators |
| ** \{ */ |
| public: |
| /// Reset initial location to final location. |
| inline void step () |
| { |
| begin = end; |
| } |
| |
| /// Extend the current location to the COUNT next columns. |
| inline void columns (unsigned int count = 1) |
| { |
| end += count; |
| } |
| |
| /// Extend the current location to the COUNT next lines. |
| inline void lines (unsigned int count = 1) |
| { |
| end.lines (count); |
| } |
| /** \} */ |
| |
| |
| public: |
| /// Beginning of the located region. |
| position begin; |
| /// End of the located region. |
| position end; |
| }; |
| |
| /// Join two location objects to create a location. |
| inline const location operator+ (const location& begin, const location& end) |
| { |
| location res = begin; |
| res.end = end.end; |
| return res; |
| } |
| |
| /// Add two location objects. |
| inline const location operator+ (const location& begin, unsigned int width) |
| { |
| location res = begin; |
| res.columns (width); |
| return res; |
| } |
| |
| /// Add and assign a location. |
| inline location& operator+= (location& res, unsigned int width) |
| { |
| res.columns (width); |
| return res; |
| } |
| ]b4_percent_define_flag_if([[define_location_comparison]], [[ |
| /// Compare two location objects. |
| inline bool |
| operator== (const location& loc1, const location& loc2) |
| { |
| return loc1.begin == loc2.begin && loc1.end == loc2.end; |
| } |
| |
| /// Compare two location objects. |
| inline bool |
| operator!= (const location& loc1, const location& loc2) |
| { |
| return !(loc1 == loc2); |
| } |
| ]])[ |
| /** \brief Intercept output stream redirection. |
| ** \param ostr the destination output stream |
| ** \param loc a reference to the location to redirect |
| ** |
| ** Avoid duplicate information. |
| */ |
| inline std::ostream& operator<< (std::ostream& ostr, const location& loc) |
| { |
| position last = loc.end - 1; |
| ostr << loc.begin; |
| if (last.filename |
| && (!loc.begin.filename |
| || *loc.begin.filename != *last.filename)) |
| ostr << '-' << last; |
| else if (loc.begin.line != last.line) |
| ostr << '-' << last.line << '.' << last.column; |
| else if (loc.begin.column != last.column) |
| ostr << '-' << last.column; |
| return ostr; |
| } |
| |
| ]b4_namespace_close[ |
| |
| #endif // not BISON_LOCATION_HH] |
| m4_divert_pop(0) |
| m4_changecom([#]) |