From: Joel E. Denny <jdenny@ces.clemson.edu>
Date: Fri, 19 Oct 2007 02:46:21 +0000 (+0000)
Subject: * NEWS: Add entry for recent .output file lookahead set fix.
X-Git-Tag: v2.3b~75
X-Git-Url: https://git.saurik.com/bison.git/commitdiff_plain/88c7874756082c43188e696020fab47bac7c53e9

* NEWS: Add entry for recent .output file lookahead set fix.
* doc/bison.texinfo (Understanding): Remove a bogus lookahead set in
the example .output text.
* tests/regression.at (Extra lookahead sets in report): Improve wording
of comments.
---

diff --git a/ChangeLog b/ChangeLog
index 3aae3d6a..c2826cb8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2007-10-19  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+	* NEWS: Add entry for recent .output file lookahead set fix.
+	* doc/bison.texinfo (Understanding): Remove a bogus lookahead set in
+	the example .output text.
+	* tests/regression.at (Extra lookahead sets in report): Improve wording
+	of comments.
+
 2007-10-17  Wojciech Polak  <polak@gnu.org>
 
 	* src/print-xml.c (print_grammar): Renamed
diff --git a/NEWS b/NEWS
index 0e4061aa..bf260476 100644
--- a/NEWS
+++ b/NEWS
@@ -15,6 +15,15 @@ Changes in version 2.3a+ (????-??-??):
     3. For any rule used only in such states, Bison now reports the rule as
        "never reduced because of conflicts".
 
+* 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
+  associated with the same rule as the reduction and (2) has its dot at the end
+  of its RHS.  Previously, Bison also erroneously printed the lookahead set
+  next to all of the state's other items associated with the same rule.  This
+  bug affected only the `.output' file and not the generated parser source
+  code.
+
 * The -g and --graph options now output graphs in Graphviz DOT format,
   not VCG format.
 
diff --git a/doc/bison.texinfo b/doc/bison.texinfo
index 4b49c811..74feb9fb 100644
--- a/doc/bison.texinfo
+++ b/doc/bison.texinfo
@@ -7387,7 +7387,7 @@ with some set of possible lookahead tokens.  When run with
 @example
 state 8
 
-    exp  ->  exp . '+' exp  [$, '+', '-', '/']   (rule 1)
+    exp  ->  exp . '+' exp   (rule 1)
     exp  ->  exp '+' exp .  [$, '+', '-', '/']   (rule 1)
     exp  ->  exp . '-' exp   (rule 2)
     exp  ->  exp . '*' exp   (rule 3)
diff --git a/tests/regression.at b/tests/regression.at
index e0ab6935..3b3272f3 100644
--- a/tests/regression.at
+++ b/tests/regression.at
@@ -1149,11 +1149,12 @@ AT_CLEANUP
 
 AT_SETUP([[Extra lookahead sets in report]])
 
-# Within a single state, Bison used to print a reduction's lookahead set next
-# to all items of the associated rule.  Instead, it should only print it next
-# to the item that is of the associated rule and whose dot is at the end of the
-# RHS.  Printing it next to items whose dot is not at the end of the RHS is
-# sometimes redundant and, as in this test case, is sometimes incorrect.
+# Bison prints each reduction's lookahead set only next to the associated
+# state's one item that (1) is associated with the same rule as the reduction
+# and (2) has its dot at the end of its RHS.  Previously, Bison also
+# erroneously printed the lookahead set next to all of the state's other items
+# associated with the same rule.  This bug affected only the `.output' file and
+# not the generated parser source code.
 
 AT_DATA([[input.y]],
 [[%%