* NEWS (2.3a+): Mention yesterday's state-removal change.

[bison.git] / data / location.cc

diff --git a/data/location.cc b/data/location.cc
index 6a5b83ea91ed2bfd6e2f142602998b6d4da8eb86..68ae2f719586c2cf025546b4c867213c1641e7d6 100644 (file)
--- a/data/location.cc
+++ b/data/location.cc
@@ -1,8 +1,7 @@
-m4_divert(-1)
-
 # C++ skeleton for Bison
 
-# Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+# 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
@@ -21,14 +20,14 @@ m4_divert(-1)
 
 # We do want M4 expansion after # for CPP macros.
 m4_changecom()
-m4_divert(0)dnl
-@output b4_dir_prefix[]position.hh
-b4_copyright([Position class for Bison C++ parsers],
+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 yy::position class.
+ ** Define the ]b4_percent_define_get([[namespace]])[::position class.
  */
 
 #ifndef BISON_POSITION_HH
@@ -36,8 +35,9 @@ b4_copyright([Position class for Bison C++ parsers],
 
 # include <iostream>
 # include <string>
+# include <algorithm>
 
-namespace yy
+namespace ]b4_percent_define_get([[namespace]])[
 {
   /// Abstract a position.
   class position
@@ -46,17 +46,17 @@ namespace yy
 ]m4_ifdef([b4_location_constructors], [
     /// Construct a position.
     position ()
-      : filename (0), line (1), column (0)
+      : filename (0), line (]b4_location_initial_line[), column (]b4_location_initial_column[)
     {
     }
 
 ])[
     /// Initialization.
-    inline void initialize (]b4_filename_type[* fn)
+    inline void initialize (]b4_percent_define_get([[filename_type]])[* fn)
     {
       filename = fn;
-      line = 1;
-      column = 0;
+      line = ]b4_location_initial_line[;
+      column = ]b4_location_initial_column[;
     }
 
     /** \name Line and Column related manipulators
@@ -65,25 +65,20 @@ namespace yy
     /// (line related) Advance to the COUNT next lines.
     inline void lines (int count = 1)
     {
-      column = 0;
+      column = ]b4_location_initial_column[;
       line += count;
     }
 
     /// (column related) Advance to the COUNT next columns.
     inline void columns (int count = 1)
     {
-      int leftmost = 0;
-      int current  = column;
-      if (leftmost <= current + count)
-       column += count;
-      else
-       column = 0;
+      column = std::max (]b4_location_initial_column[u, column + count);
     }
     /** \} */
 
   public:
     /// File name to which this position refers.
-    ]b4_filename_type[* filename;
+    ]b4_percent_define_get([[filename_type]])[* filename;
     /// Current line number.
     unsigned int line;
     /// Current column number.
@@ -119,7 +114,24 @@ namespace yy
   {
     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
@@ -134,13 +146,13 @@ namespace yy
 
 }
 #endif // not BISON_POSITION_HH]
-@output b4_dir_prefix[]location.hh
-b4_copyright([Location class for Bison C++ parsers],
+@output(b4_dir_prefix[]location.hh@)
+b4_copyright([Locations for Bison parsers in C++],
   [2002, 2003, 2004, 2005, 2006])[
 
 /**
  ** \file location.hh
- ** Define the yy::location class.
+ ** Define the ]b4_percent_define_get([[namespace]])[::location class.
  */
 
 #ifndef BISON_LOCATION_HH
@@ -150,7 +162,7 @@ b4_copyright([Location class for Bison C++ parsers],
 # include <string>
 # include "position.hh"
 
-namespace yy
+namespace ]b4_percent_define_get([[namespace]])[
 {
 
   /// Abstract a location.
@@ -166,7 +178,7 @@ namespace yy
 
 ])[
     /// Initialization.
-    inline void initialize (]b4_filename_type[* fn)
+    inline void initialize (]b4_percent_define_get([[filename_type]])[* fn)
     {
       begin.initialize (fn);
       end = begin;
@@ -224,7 +236,21 @@ namespace yy
     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
@@ -249,5 +275,5 @@ namespace yy
 }
 
 #endif // not BISON_LOCATION_HH]
-m4_divert(-1)
+m4_divert_pop(0)
 m4_changecom([#])