Rearrange initialization of the parser state variables so that the

[bison.git] / data / location.cc

diff --git a/data/location.cc b/data/location.cc
index bb701b3ea028aa3acf279b678f6302f9a122b0e8..2d32bf77bf8f8c62ebaadd07a935f2d8d712e8bf 100644 (file)
--- a/data/location.cc
+++ b/data/location.cc
@@ -2,7 +2,7 @@ m4_divert(-1)
 
 # C++ skeleton for Bison
 
-# Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2003, 2004, 2005, 2006 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
@@ -19,17 +19,16 @@ m4_divert(-1)
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 # 02110-1301  USA
 
-m4_include(b4_pkgdatadir/[c++.m4])
-
 # 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], [2002, 2003, 2004, 2005])[
+b4_copyright([Positions for Bison parsers in C++],
+  [2002, 2003, 2004, 2005, 2006])[
 
 /**
  ** \file position.hh
- ** Define the position class.
+ ** Define the ]b4_namespace[::position class.
  */
 
 #ifndef BISON_POSITION_HH
@@ -37,24 +36,29 @@ b4_copyright([Position class for Bison C++ parsers], [2002, 2003, 2004, 2005])[
 
 # include <iostream>
 # include <string>
+# include <algorithm>
 
-namespace yy
+namespace ]b4_namespace[
 {
   /// Abstract a position.
   class position
   {
-    /** \name Ctor & dtor.
-     ** \{ */
   public:
+]m4_ifdef([b4_location_constructors], [
     /// Construct a position.
-    position () :
-      filename (0),
-      line (1),
-      column (0)
+    position ()
+      : filename (0), line (]b4_location_initial_line[), column (]b4_location_initial_column[)
     {
     }
-    /** \} */
 
+])[
+    /// Initialization.
+    inline void initialize (]b4_filename_type[* fn)
+    {
+      filename = fn;
+      line = ]b4_location_initial_line[;
+      column = ]b4_location_initial_column[;
+    }
 
     /** \name Line and Column related manipulators
      ** \{ */
@@ -62,19 +66,14 @@ 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);
     }
     /** \} */
 
@@ -116,7 +115,24 @@ namespace yy
   {
     return begin + -width;
   }
+]m4_if(b4_define_location_comparison, [1], [[
+  /// 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
@@ -132,11 +148,12 @@ namespace yy
 }
 #endif // not BISON_POSITION_HH]
 @output b4_dir_prefix[]location.hh
-b4_copyright([Location class for Bison C++ parsers], [2002, 2003, 2004, 2005])[
+b4_copyright([Locations for Bison parsers in C++],
+  [2002, 2003, 2004, 2005, 2006])[
 
 /**
  ** \file location.hh
- ** Define the location class.
+ ** Define the ]b4_namespace[::location class.
  */
 
 #ifndef BISON_LOCATION_HH
@@ -146,23 +163,27 @@ b4_copyright([Location class for Bison C++ parsers], [2002, 2003, 2004, 2005])[
 # include <string>
 # include "position.hh"
 
-namespace yy
+namespace ]b4_namespace[
 {
 
   /// Abstract a location.
   class location
   {
-    /** \name Ctor & dtor.
-     ** \{ */
   public:
+]m4_ifdef([b4_location_constructors], [
     /// Construct a location.
-    location () :
-      begin (),
-      end ()
+    location ()
+      : begin (), end ()
     {
     }
-    /** \} */
 
+])[
+    /// Initialization.
+    inline void initialize (]b4_filename_type[* fn)
+    {
+      begin.initialize (fn);
+      end = begin;
+    }
 
     /** \name Line and Column related manipulators
      ** \{ */
@@ -216,7 +237,21 @@ namespace yy
     res.columns (width);
     return res;
   }
+]m4_if(b4_define_location_comparison, [1], [[
+  /// 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