version 2.6.1

[bison.git] / NEWS

diff --git a/NEWS b/NEWS
index 403265fa29b0cc3865b3ff665793f3d8f20d22a3..0da5bdfa2299a7509380bfc26366775fb1d53748 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,13 +1,51 @@
 GNU Bison NEWS
 
-* Noteworthy changes in release ?.? (????-??-??) [?]
+* Noteworthy changes in release 2.6.1 (2012-07-30) [stable]
 
-** Future changes
+ Bison no longer executes user-specified M4 code when processing a grammar.
+
+** Future Changes
+
+  In addition to the removal of the features announced in Bison 2.6, the
+  next major release will remove the "Temporary hack for adding a semicolon
+  to the user action", as announced in the release 2.5.  Instead of:
+
+    exp: exp "+" exp { $$ = $1 + $3 };
+
+  write:
+
+    exp: exp "+" exp { $$ = $1 + $3; };
+
+** Bug fixes
+
+*** Type names are now properly escaped.
+
+*** glr.cc: set_debug_level and debug_level work as expected.
+
+*** Stray @ or $ in actions
+
+  While Bison used to warn about stray $ or @ in action rules, it did not
+  for other actions such as printers, destructors, or initial actions.  It
+  now does.
+
+** Type names in actions
+
+  For consistency with rule actions, it is now possible to qualify $$ by a
+  type-name in destructors, printers, and initial actions.  For instance:
+
+    %printer { fprintf (yyo, "(%d, %f)", $<ival>$, $<fval>$); } <*> <>;
+
+  will display two values for each typed and untyped symbol (provided
+  that YYSTYPE has both "ival" and "fval" fields).
+
+* Noteworthy changes in release 2.6 (2012-07-19) [stable]
+
+** Future Changes
 
   The next major release of Bison will drop support for the following
   deprecated features.  Please report disagreements to bug-bison@gnu.org.
 
-*** K&C parsers
+*** K&R C parsers
 
   Support for generating parsers in K&R C will be removed.  Parsers
   generated for C support ISO C90, and are tested with ISO C99 and ISO C11
@@ -32,7 +70,7 @@ GNU Bison NEWS
   because existing versions of ylwrap (e.g., Automake 1.12.1) do not support
   it.
 
-** Headers
+** Generated Parser Headers
 
 *** Guards (yacc.c, glr.c, glr.cc)
 
@@ -94,10 +132,19 @@ GNU Bison NEWS
     # define BAR_FOO_H                  # define BAR_FOO_H
 
     /* Enabling traces.  */             /* Enabling traces.  */
-    # ifndef YYDEBUG                    # ifndef YYDEBUG
-    #  define YYDEBUG 0                 #  define YYDEBUG 0
-    # endif                             # endif
-    # if YYDEBUG                        # if YYDEBUG
+    # ifndef YYDEBUG                  | # ifndef BAR_DEBUG
+                                      > #  if defined YYDEBUG
+                                      > #   if YYDEBUG
+                                      > #    define BAR_DEBUG 1
+                                      > #   else
+                                      > #    define BAR_DEBUG 0
+                                      > #   endif
+                                      > #  else
+    #  define YYDEBUG 0               | #   define BAR_DEBUG 0
+                                      > #  endif
+    # endif                           | # endif
+
+    # if YYDEBUG                      | # if BAR_DEBUG
     extern int bar_debug;               extern int bar_debug;
     # endif                             # endif