X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/9ce27ab013185d1c17c78e0d57ff637319cb1e29..ea9e670d728ac659e139434de31ea9306ecdd117:/data/location.cc

diff --git a/data/location.cc b/data/location.cc
index 976fc34b..631247a7 100644
--- a/data/location.cc
+++ b/data/location.cc
@@ -18,27 +18,11 @@
 m4_pushdef([b4_copyright_years],
            [2002-2012])
 
-# 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++])[
-
-/**
- ** \file ]b4_dir_prefix[position.hh
- ** Define the ]b4_namespace_ref[::position class.
- */
-
-]b4_cpp_guard_open([b4_dir_prefix[]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:
@@ -89,7 +73,7 @@ b4_copyright([Positions for Bison parsers in C++])[
   };
 
   /// Add and assign a position.
-  inline const position&
+  inline position&
   operator+= (position& res, const int width)
   {
     res.columns (width);
@@ -105,7 +89,7 @@ b4_copyright([Positions for Bison parsers in C++])[
   }
 
   /// Add and assign a position.
-  inline const position&
+  inline position&
   operator-= (position& res, const int width)
   {
     return res += -width;
@@ -140,33 +124,21 @@ b4_copyright([Positions for Bison parsers in C++])[
    ** \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[
-]b4_cpp_guard_close([b4_dir_prefix[]position.hh])
-@output(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 <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:
@@ -277,7 +249,9 @@ b4_copyright([Locations for Bison parsers in C++])[
    **
    ** 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;
@@ -291,10 +265,53 @@ b4_copyright([Locations for Bison parsers in C++])[
       ostr << '-' << last.column;
     return ostr;
   }
+]])
+
 
+# We do want M4 expansion after # for CPP macros.
+m4_changecom()
+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])
-m4_divert_pop(0)
-m4_popdef([b4_copyright_years])dnl
-m4_changecom([#])
+b4_output_end()
+])
+
+
+m4_popdef([b4_copyright_years])