* bootstrap (TP_URL, WGET_COMMAND): New vars.

[bison.git] / NEWS

diff --git a/NEWS b/NEWS
index 8d321cdf6740956929d9b321ffb153f961a8a1d5..a1bf9ae1d0bf14b964b38b9b78a91461d77dcdaf 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,14 +1,42 @@
 Bison News
 ----------
 
-Changes in version 2.1a, 2006-02-13:
+Changes in version 2.3+:
+
+* Except for LALR(1) parsers in C with POSIX Yacc emulation enabled (with `-y',
+  `--yacc', or `%yacc'), Bison no longer generates #define statements for
+  associating token numbers with token names.  Removing the #define statements
+  helps to sanitize the global namespace during preprocessing, but POSIX Yacc
+  requires them.  Bison still generates an enum for token names in all cases.
+
+* The option `--report=look-ahead' has been changed to `--report=lookahead'.
+  The old spelling still works, but is not documented and may be removed
+  in a future release.
+
+Changes in version 2.3, 2006-06-05:
+
+* GLR grammars should now use `YYRECOVERING ()' instead of `YYRECOVERING',
+  for compatibility with LALR(1) grammars.
+
+* It is now documented that any definition of YYSTYPE or YYLTYPE should
+  be to a type name that does not contain parentheses or brackets.
+
+Changes in version 2.2, 2006-05-19:
+
+* The distribution terms for all Bison-generated parsers now permit
+  using the parsers in nonfree programs.  Previously, this permission
+  was granted only for Bison-generated LALR(1) parsers in C.
+
+* %name-prefix changes the namespace name in C++ outputs.
+
+* The C++ parsers export their token_type.
 
 * Bison now allows multiple %union declarations, and concatenates
   their contents together.
 
 * New warning: unused values
-  Typed right-hand side symbols whose values are not used are reported,
-  if the associated types have destructors.  For instance:
+  Right-hand side symbols whose values are not used are reported,
+  if the symbols have destructors.  For instance:
 
      exp: exp "?" exp ":" exp { $1 ? $1 : $3; }
        | exp "+" exp
@@ -71,10 +99,10 @@ Changes in version 2.1a, 2006-02-13:
   for previous releases of Bison, and this one.
 
   If you wish to update, then make sure older version of Bison will
-  fail using `%require "2.1a"'.
+  fail using `%require "2.2"'.
 
 * DJGPP support added.
-
+\f
 Changes in version 2.1, 2005-09-16:
 
 * The C++ lalr1.cc skeleton supports %lex-param.
@@ -100,7 +128,7 @@ Changes in version 2.1, 2005-09-16:
   a syntax error associated with '%token NUM "number"' they might
   print 'syntax error, unexpected number' instead of 'syntax error,
   unexpected "number"'.
-
+\f
 Changes in version 2.0, 2004-12-25:
 
 * Possibly-incompatible changes
@@ -143,8 +171,7 @@ Changes in version 2.0, 2004-12-25:
     This is a GNU extension.
 
   - The option `--report=lookahead' was changed to `--report=look-ahead'.
-    The old spelling still works, but is not documented and will be
-    removed.
+    [However, this was changed back after 2.3.]
 
   - Experimental %destructor support has been added to lalr1.cc.
 
@@ -411,8 +438,8 @@ Changes in version 1.50, 2002-10-04:
   produces additional information:
   - itemset
     complete the core item sets with their closure
-  - lookahead [changed to `look-ahead' in 1.875e and later]
-    explicitly associate look-ahead tokens to items
+  - lookahead [changed to `look-ahead' in 1.875e through 2.3, but changed back]
+    explicitly associate lookahead tokens to items
   - solved
     describe shift/reduce conflicts solving.
     Bison used to systematically output this information on top of