X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/27290b603576d04f1d6498b0ca509a84b81f193f..83af6585210d0155a0ad400a1cb7c515a57ad6fe:/NEWS?ds=sidebyside

diff --git a/NEWS b/NEWS
index 2da19c7b..40c06f5b 100644
--- a/NEWS
+++ b/NEWS
@@ -51,6 +51,15 @@ Bison News
   use of the %error-verbose directive is deprecated in favor of
   %define parse.error "verbose".
 
+** Semantic predicates
+
+  The new, experimental, semantic-predicate feature allows actions of
+  the form %?{ BOOLEAN-EXPRESSION }, which cause syntax errors (as for
+  YYERROR) if the expression evaluates to 0, and are evaluated immediately
+  in GLR parsers, rather than being deferred.  The result is that they
+  allow the programmer to prune possible parses based on the values of
+  runtime expressions.
+
 * Changes in version 2.5 (????-??-??):
 
 ** Named References Support
@@ -274,6 +283,9 @@ Bison News
 
 * Changes in version 2.4.3 (????-??-??):
 
+** Bison now obeys -Werror and --warnings=error for warnings about
+   grammar rules that are useless in the parser due to conflicts.
+
 ** Problems with spawning M4 on at least FreeBSD 8 and FreeBSD 9 have
    been fixed.
 
@@ -287,6 +299,8 @@ Bison News
    errors in Bison 2.5.  They will remain warnings, which should be
    sufficient for POSIX while avoiding backward compatibility issues.
 
+** Minor documentation fixes.
+
 * Changes in version 2.4.2 (2010-03-20):
 
 ** Some portability problems that resulted in failures and livelocks
@@ -1428,7 +1442,9 @@ End:
 
 -----
 
-Copyright (C) 1995-2010 Free Software Foundation, Inc.
+Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation,
+Inc.
 
 This file is part of Bison, the GNU Parser Generator.