X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/c373bf8bb8da68ed12b1e73aaa2d777f6c701e46..2bb3ebec2191c93534bf8b52d647bd221c1cab3b:/NEWS?ds=sidebyside

diff --git a/NEWS b/NEWS
index 09defd4d..1458cb2d 100644
--- a/NEWS
+++ b/NEWS
@@ -3,10 +3,22 @@ Bison News
 
 Changes in version 2.3a+ (????-??-??):
 
+* The quotes around NAME that used to be required in the following directive
+  are now deprecated:
+
+    %define NAME "VALUE"
+
+* The directive `%pure-parser' is now deprecated in favor of:
+
+    %define api.pure
+
+  which has the same effect except that Bison is more careful to warn about
+  unreasonable usage in the latter case.
+
 * Push Parsing
 
   Bison can now generate an LALR(1) parser in C with a push interface.  That
-  is, instead of invoking yyparse, which pulls tokens from `yylex', you can
+  is, instead of invoking `yyparse', which pulls tokens from `yylex', you can
   push one token at a time to the parser using `yypush_parse', which will
   return to the caller after processing each token.  By default, the push
   interface is disabled.  Either of the following directives will enable it:
@@ -29,6 +41,11 @@ Changes in version 2.3a+ (????-??-??):
 
     %defines "parser.h"
 
+* When reporting useless rules, useless nonterminals, and unused terminals,
+  Bison now employs the terms "useless in grammar" instead of "useless",
+  "useless in parser" instead of "never reduced", and "unused in grammar"
+  instead of "unused".
+
 * Unreachable State Removal
 
   Previously, Bison sometimes generated parser tables containing unreachable
@@ -42,7 +59,7 @@ Changes in version 2.3a+ (????-??-??):
        directives in existing grammar files.
 
     3. For any rule used only in such states, Bison now reports the rule as
-       "never reduced because of conflicts".
+       "useless in parser due to conflicts".
 
   This feature can be disabled with the following directive:
 
@@ -52,7 +69,7 @@ Changes in version 2.3a+ (????-??-??):
   for further discussion.
 
 * Lookahead Set Correction in the `.output' Report
-  
+
   When instructed to generate a `.output' file including lookahead sets
   (using `--report=lookahead', for example), Bison now prints each reduction's
   lookahead set only next to the associated state's one item that (1) is
@@ -62,6 +79,8 @@ Changes in version 2.3a+ (????-??-??):
   bug affected only the `.output' file and not the generated parser source
   code.
 
+* --report-file=FILE is a new flag to override the default `.output' file name.
+
 * The `=' that used to be required in the following directives is now
   deprecated:
 
@@ -69,11 +88,6 @@ Changes in version 2.3a+ (????-??-??):
     %name-prefix "c_"
     %output "parser.c"
 
-* The quotes around NAME that used to be required in the following directive
-  are now deprecated:
-
-    %define NAME "VALUE"
-
 * An Alternative to `%{...%}' -- `%code QUALIFIER {CODE}'
 
   Bison 2.3a provided a new set of directives as a more flexible alternative to
@@ -140,6 +154,13 @@ Changes in version 2.3a+ (????-??-??):
   See the section `Freeing Discarded Symbols' in the Bison manual for further
   details.
 
+* %left, %right, and %nonassoc can now declare token numbers.  This is required
+  by POSIX.  However, see the end of section `Operator Precedence' in the Bison
+  manual for a caveat concerning the treatment of literal strings.
+
+* The nonfunctional --no-parser, -n, and %no-parser options have been
+  completely removed from Bison.
+
 Changes in version 2.3a, 2006-09-13:
 
 * Instead of %union, you can define and use your own union type
@@ -964,7 +985,7 @@ End:
 -----
 
 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
-2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
 
 This file is part of Bison, the GNU Compiler Compiler.