Warn about unset midrule $$ if the corresponding $n is used.

[bison.git] / ChangeLog

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+2006-10-20  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+       Warn about unset midrule $$ if the corresponding $n is used.
+       * src/reader.c (symbol_should_be_used): Check midrule parent rule for
+       $n usage.
+       (packgram): Before invoking grammar_rule_check on any rule, make sure
+       all actions have already been scanned in order to set `used' flags.
+       Otherwise, checking that a midrule's $$ is set will not always work
+       properly because the midrule check must forward-reference the midrule's
+       parent rule.
+       * tests/input.at (AT_CHECK_UNUSED_VALUES): Extend to check the new
+       warning.
+
 2006-10-20  Joel E. Denny  <jdenny@ces.clemson.edu>
 
        More improvements to the documentation of the prologue alternatives: