doc: discuss named references after locations.

[bison.git] / NEWS

diff --git a/NEWS b/NEWS
index dac76f44d2bfa497aa659d3389bbe82c716ae2ac..ff3f19fe196fb6998ebc79e24367bc5671460cb6 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -60,7 +60,11 @@ Bison News
   allow the programmer to prune possible parses based on the values of
   runtime expressions.
 
-* Changes in version 2.5 (????-??-??):
+* Changes in version 2.5.1 (????-??-??):
+
+** Minor improvements have been made to the manual.
+
+* Changes in version 2.5 (2011-05-14):
 
 ** Grammar symbol names can now contain non-initial dashes:
 
@@ -99,7 +103,7 @@ Bison News
 
   IELR(1) is a minimal LR(1) parser table generation algorithm.  That
   is, given any context-free grammar, IELR(1) generates parser tables
-  with the full language recognition power of canonical LR(1) but with
+  with the full language-recognition power of canonical LR(1) but with
   nearly the same number of parser states as LALR(1).  This reduction
   in parser states is often an order of magnitude.  More importantly,
   because canonical LR(1)'s extra parser states may contain duplicate
@@ -201,7 +205,7 @@ Bison News
   The old names are now deprecated but will be maintained indefinitely
   for backward compatibility.
 
-*** Values no longer need to be quoted in grammar file:
+*** Values no longer need to be quoted in the grammar file:
 
   If a %define value is an identifier, it no longer needs to be placed
   within quotations marks.  For example,
@@ -393,7 +397,7 @@ Bison News
 
     bison -Werror,none,yacc gram.y
 
-*** The `none' category now disables all Bison warnings.
+*** The `none' category now disables all Bison warnings:
 
   Previously, the `none' category disabled only Bison warnings for
   which there existed a specific -W/--warning category.  However,
@@ -402,6 +406,16 @@ Bison News
 
     bison -Wnone gram.y
 
+** Precedence directives can now assign token number 0:
+
+  Since Bison 2.3b, which restored the ability of precedence
+  directives to assign token numbers, doing so for token number 0 has
+  produced an assertion failure.  For example:
+
+    %left END 0
+
+  This bug has been fixed.
+
 * Changes in version 2.4.3 (2010-08-05):
 
 ** Bison now obeys -Werror and --warnings=error for warnings about