version 2.5.1

[bison.git] / NEWS

diff --git a/NEWS b/NEWS
index 27c4974adc79a6eb54f842f8e738c743fb936675..d105f79c4b8b9035ea22a5882c9c1a900d42b11a 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,7 +1,6 @@
-Bison News
-----------
+GNU Bison NEWS
 
-* Changes in version 2.5.1_rc1 (2012-05-14):
+* Noteworthy changes in release 2.5.1 (2012-06-05) [stable]
 
 ** Future changes:
 
@@ -26,12 +25,35 @@ Bison News
   The Java parser no longer throws ArrayIndexOutOfBoundsException if the
   first token leads to a syntax error.  Some minor clean ups.
 
-** C++11 compatibility:
+** Changes for C++:
+
+*** C++11 compatibility:
 
   C and C++ parsers use "nullptr" instead of "0" when __cplusplus is 201103L
   or higher.
 
-** C++ locations:
+*** Header guards
+
+  The header files such as "parser.hh", "location.hh", etc. used a constant
+  name for preprocessor guards, for instance:
+
+  #ifndef BISON_LOCATION_HH
+  # define BISON_LOCATION_HH
+  ...
+  #endif // !BISON_LOCATION_HH
+
+  The inclusion guard is now computed from "PREFIX/FILE-NAME", where lower
+  case characters are converted to upper case, and series of
+  non-alphanumerical characters are converted to an underscore.
+
+  With "bison -o lang++/parser.cc", "location.hh" would now include:
+
+  #ifndef YY_LANG_LOCATION_HH
+  # define YY_LANG_LOCATION_HH
+  ...
+  #endif // !YY_LANG_LOCATION_HH
+
+*** C++ locations:
 
   The position and location constructors (and their initialize methods)
   accept new arguments for line and column.  Several issues in the