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:
+       * NEWS (2.3a+): Mention the new `Prologue Alternatives' section in the
+       Bison manual.
+       * doc/bison.texinfo (Prologue Alternatives): Correct some errors.  Add
+       some text to clarify the relative importance of the new directives and
+       to show how these directives may be viewed as code labels.
+
+2006-10-16  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+       Similar to the recently removed %before-header, add %code-top as the
+       alternative to the pre-prologue.  Mentioned at
+       <http://lists.gnu.org/archive/html/bison-patches/2006-10/msg00063.html>.
+       Also, let the prologue alternatives appear in the grammar section.
+       * src/parse-gram.y (PERCENT_CODE_TOP): New token.
+       (prologue_declaration): Move the existing prologue alternatives to...
+       (grammar_declaration): ... here and add %code-top.
+       * src/scan-gram.l (PERCENT_CODE_TOP): New token.
+
+       Clean up and extend documentation for the prologue alternatives.
+       * NEWS (2.3a+): Describe prologue alternatives.
+       * doc/bison.texinfo (Prologue): Move discussion of prologue
+       alternatives to...
+       (Prologue Alternatives): ... this new section, and extend it to discuss
+       all 4 directives in detail.
+       (Bison Symbols): Clean up discussion of prologue alternatives and add
+       %code-top.
+
+2006-10-16  Juan Manuel Guerrero  <juan.guerrero@gmx.de>
+
+       DJGPP specific issues.
+
+       * djgpp/config.bat: config.hin has been moved to lib. Adjust
+       config.bat accordingly.
+       * djgpp/config.sed: Adjust config.sed for the use of autoconf 2.60.
+       * djgpp/config.site: Likewise.
+

 2006-10-16  Paolo Bonzini  <bonzini@gnu.org>
 
 2006-10-16  Paolo Bonzini  <bonzini@gnu.org>
 

+       Replace %*-header with %provides, %requires, %code.  See discussion at
+       http://lists.gnu.org/archive/html/bison-patches/2006-10/msg00002.html
+

        * data/bison.m4 (b4_user_requires, b4_user_provides): New.
        (b4_user_start_header): Remove.
        * data/glr.c: Use new macros instead of b4_*start_header
        * data/bison.m4 (b4_user_requires, b4_user_provides): New.
        (b4_user_start_header): Remove.
        * data/glr.c: Use new macros instead of b4_*start_header