# C++ skeleton for Bison
-# Copyright (C) 2002-2007, 2009-2012 Free Software Foundation, Inc.
+# Copyright (C) 2002-2013 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
# 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++],
- [2002-2007, 2009-2012])[
+m4_pushdef([b4_copyright_years],
+ [2002-2013])
-/**
- ** \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_null_define[
-
-]b4_namespace_open[
- /// Abstract a position.
+# b4_position_define
+# ------------------
+# Define class position.
+m4_define([b4_position_define],
+[[ /// Abstract a position.
class position
{
- public:
-]m4_ifdef([b4_location_constructors], [[
+ public:]m4_ifdef([b4_location_constructors], [[
/// Construct a position.
explicit position (]b4_percent_define_get([[filename_type]])[* f = YY_NULL,
unsigned int l = ]b4_location_initial_line[u,
/// (line related) Advance to the COUNT next lines.
void lines (int count = 1)
{
- column = ]b4_location_initial_column[u;
- line += count;
+ if (count)
+ {
+ column = ]b4_location_initial_column[u;
+ line = add_ (line, count, ]b4_location_initial_line[);
+ }
}
/// (column related) Advance to the COUNT next columns.
void columns (int count = 1)
{
- column = std::max (]b4_location_initial_column[u, column + count);
+ column = add_ (column, count, ]b4_location_initial_column[);
}
/** \} */
unsigned int line;
/// Current column number.
unsigned int column;
+
+ private:
+ /// Compute max(min, lhs+rhs) (provided min <= lhs).
+ static unsigned int add_ (unsigned int lhs, int rhs, unsigned int min)
+ {
+ return (0 < rhs || -static_cast<unsigned int>(rhs) < lhs
+ ? rhs + lhs
+ : min);
+ }
};
/// Add and assign a position.
- inline const position&
- operator+= (position& res, const int width)
+ inline position&
+ operator+= (position& res, int width)
{
res.columns (width);
return res;
}
/// Add two position objects.
- inline const position
- operator+ (const position& begin, const int width)
+ inline position
+ operator+ (position res, int width)
{
- position res = begin;
return res += width;
}
/// Add and assign a position.
- inline const position&
- operator-= (position& res, const int width)
+ inline position&
+ operator-= (position& res, int width)
{
return res += -width;
}
/// Add two position objects.
- inline const position
- operator- (const position& begin, const int width)
+ inline position
+ operator- (position res, int width)
{
- return begin + -width;
+ return res -= width;
}
]b4_percent_define_flag_if([[define_location_comparison]], [[
/// Compare two position objects.
** \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)
+ template <typename YYChar>
+ inline std::basic_ostream<YYChar>&
+ operator<< (std::basic_ostream<YYChar>& 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++],
- [2002-2007, 2009-2012])[
-
-/**
- ** \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.
+# b4_location_define
+# ------------------
+m4_define([b4_location_define],
+[[ /// Abstract a location.
class location
{
public:
}
/// Extend the current location to the COUNT next columns.
- void columns (unsigned int count = 1)
+ void columns (int count = 1)
{
end += count;
}
/// Extend the current location to the COUNT next lines.
- void lines (unsigned int count = 1)
+ void lines (int count = 1)
{
end.lines (count);
}
};
/// Join two location objects to create a location.
- inline const location operator+ (const location& begin, const location& end)
+ inline location operator+ (location res, 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)
+ /// Change end position in place.
+ inline location& operator+= (location& res, int width)
{
- location res = begin;
res.columns (width);
return res;
}
- /// Add and assign a location.
- inline location& operator+= (location& res, unsigned int width)
+ /// Change end position.
+ inline location operator+ (location res, int width)
{
- res.columns (width);
- return res;
+ return res += width;
+ }
+
+ /// Change end position in place.
+ inline location& operator-= (location& res, int width)
+ {
+ return res += -width;
+ }
+
+ /// Change end position.
+ inline location operator- (const location& begin, int width)
+ {
+ return begin + -width;
}
]b4_percent_define_flag_if([[define_location_comparison]], [[
/// Compare two location objects.
**
** Avoid duplicate information.
*/
- inline std::ostream& operator<< (std::ostream& ostr, const location& loc)
+ template <typename YYChar>
+ inline std::basic_ostream<YYChar>&
+ operator<< (std::basic_ostream<YYChar>& 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;
+ unsigned int end_col = 0 < loc.end.column ? loc.end.column - 1 : 0;
+ ostr << loc.begin// << "(" << loc.end << ") "
+;
+ if (loc.end.filename
+ && (!loc.begin.filename
+ || *loc.begin.filename != *loc.end.filename))
+ ostr << '-' << loc.end.filename << ':' << loc.end.line << '.' << end_col;
+ else if (loc.begin.line < loc.end.line)
+ ostr << '-' << loc.end.line << '.' << end_col;
+ else if (loc.begin.column < end_col)
+ ostr << '-' << end_col;
return ostr;
}
+]])
+
+
+b4_defines_if([
+b4_output_begin([b4_dir_prefix[]position.hh])
+b4_copyright([Positions for Bison parsers in C++])[
+
+/**
+ ** \file ]b4_dir_prefix[position.hh
+ ** Define the ]b4_namespace_ref[::position class.
+ */
+
+]b4_cpp_guard_open([b4_dir_prefix[]position.hh])[
+
+# include <algorithm> // std::max
+# include <iostream>
+# include <string>
+]b4_null_define[
+
+]b4_namespace_open[
+]b4_position_define[
+]b4_namespace_close[
+]b4_cpp_guard_close([b4_dir_prefix[]position.hh])
+b4_output_end()
+
+
+b4_output_begin([b4_dir_prefix[]location.hh])
+b4_copyright([Locations for Bison parsers in C++])[
+
+/**
+ ** \file ]b4_dir_prefix[location.hh
+ ** Define the ]b4_namespace_ref[::location class.
+ */
+
+]b4_cpp_guard_open([b4_dir_prefix[]location.hh])[
+
+# include "position.hh"
+
+]b4_namespace_open[
+]b4_location_define[
]b4_namespace_close[
+]b4_cpp_guard_close([b4_dir_prefix[]location.hh])
+b4_output_end()
+])
+
-#endif // not BISON_LOCATION_HH]
-m4_divert_pop(0)
-m4_changecom([#])
+m4_popdef([b4_copyright_years])
projects / bison.git / blobdiff