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+# 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([#])