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Bison News
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Changes in version 1.29e:

* `--defines' and `--graph' have now an optionnal argument which is the
  output file name. `-d' and `-g' do not change, they do not take any
  argument.

* `%source_extension' and `%header_extension' are removed, failed
  experiment.

* The test suite is more portable.

* Better portability.

Changes in version 1.29:

* The output file does not define const, as this caused problems when used
  with common autoconfiguration schemes.  If you still use ancient compilers
  that lack const, compile with the equivalent of the C compiler option
  `-Dconst='.  autoconf's AC_C_CONST macro provides one way to do this.

* Added `-g' and `--graph'.

* The Bison manual is now distributed under the terms of the GNU FDL.

* The input and the output files has automatically a similar extension.

* Russian translation added.

* NLS support updated; should hopefully be less troublesome.

* Added the old Bison reference card.

* Added `--locations' and `%locations'.

* Added `-S' and `--skeleton'.

* `%raw', `-r', `--raw' is disabled.

* Special characters are escaped when output.  This solves the problems
  of the #line lines with path names including backslashes.

* New directives.
  `%yacc', `%fixed_output_files', `%defines', `%no_parser', `%verbose',
  `%debug', `%source_extension' and `%header_extension'.
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Changes in version 1.28:

* Should compile better now with K&R compilers.

* Added NLS.

* Fixed a problem with escaping the double quote character.

* There is now a FAQ.
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Changes in version 1.27:

* The make rule which prevented bison.simple from being created on
  some systems has been fixed.
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Changes in version 1.26:

* Bison now uses automake.

* New mailing lists: <bug-bison@gnu.org> and <help-bison@gnu.org>.

* Token numbers now start at 257 as previously documented, not 258.

* Bison honors the TMPDIR environment variable.

* A couple of buffer overruns have been fixed.

* Problems when closing files should now be reported.

* Generated parsers should now work even on operating systems which do
  not provide alloca().
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Changes in version 1.25:

* Errors in the input grammar are not fatal; Bison keeps reading
the grammar file, and reports all the errors found in it.

* Tokens can now be specified as multiple-character strings: for
example, you could use "<=" for a token which looks like <=, instead
of chosing a name like LESSEQ.

* The %token_table declaration says to write a table of tokens (names
and numbers) into the parser file.  The yylex function can use this
table to recognize multiple-character string tokens, or for other
purposes.

* The %no_lines declaration says not to generate any #line preprocessor
directives in the parser file.

* The %raw declaration says to use internal Bison token numbers, not
Yacc-compatible token numbers, when token names are defined as macros.

* The --no-parser option produces the parser tables without including
the parser engine; a project can now use its own parser engine.
The actions go into a separate file called NAME.act, in the form of
a switch statement body.
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Changes in version 1.23:

The user can define YYPARSE_PARAM as the name of an argument to be
passed into yyparse.  The argument should have type void *.  It should
actually point to an object.  Grammar actions can access the variable
by casting it to the proper pointer type.

Line numbers in output file corrected.
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Changes in version 1.22:

--help option added.
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Changes in version 1.20:

Output file does not redefine const for C++.