* 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 3aae3d6a8df12d92c0f8dd22d03b88de41688d8f..c2826cb84319f9312590b14588c64471d0ca4b9f 100644 (file)
--- 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 0e4061aab57d2f191120d123592f063f89a338eb..bf260476b0253dd1cc70431f1a5680e021625695 100644 (file)
--- 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 4b49c8113370810f784ad85fe73423cd774b9aed..74feb9fbbe00122ecec3be6d7bb8d96bf6d4268d 100644 (file)
--- 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 e0ab69355d5d150b78b794dc1a676e5d3f5a76f4..3b3272f37009eb932dbdfc539584b0324fa21609 100644 (file)
--- 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]],
 [[%%