NEWS

   1 Bison News
   2 ----------
   3
   4 Changes in version 1.30b:
   5
   6 * Fixed parser memory leaks.
   7   When the generated parser was using malloc to extend its stacks, the
   8   previous allocations were not freed.
   9
  10 * Fixed verbose output file.
  11   Some newlines were missing.
  12   Some conflicts in state descriptions were missing.
  13
  14 * Fixed conflict report.
  15   Option -v was needed to get the result.
  16
  17 * %expect
  18   Was not used.
  19   Mismatches are errors, not warnings.
  20
  21 * Fixed incorrect processing of some invalid input.
  22
  23 * Fixed CPP guards: 9foo.h uses BISON_9FOO_H instead of 9FOO_H.
  24
  25 * Fixed some typos in the documentation.
  26
  27 * %token MY_EOF 0 is supported.
  28   Before, MY_EOF was silently renumbered as 257.
  29
  30 * doc/refcard.tex is updated.
  31
  32 * %output, %file-prefix, %name-prefix.
  33   New.
  34
  35 * --output
  36   New, aliasing `--output-file'.
  37 \f
  38 Changes in version 1.30, 2001-10-26:
  39
  40 * `--defines' and `--graph' have now an optionnal argument which is the
  41   output file name. `-d' and `-g' do not change, they do not take any
  42   argument.
  43
  44 * `%source_extension' and `%header_extension' are removed, failed
  45   experiment.
  46
  47 * Portability fixes.
  48 \f
  49 Changes in version 1.29, 2001-09-07:
  50
  51 * The output file does not define const, as this caused problems when used
  52   with common autoconfiguration schemes.  If you still use ancient compilers
  53   that lack const, compile with the equivalent of the C compiler option
  54   `-Dconst='.  autoconf's AC_C_CONST macro provides one way to do this.
  55
  56 * Added `-g' and `--graph'.
  57
  58 * The Bison manual is now distributed under the terms of the GNU FDL.
  59
  60 * The input and the output files has automatically a similar extension.
  61
  62 * Russian translation added.
  63
  64 * NLS support updated; should hopefully be less troublesome.
  65
  66 * Added the old Bison reference card.
  67
  68 * Added `--locations' and `%locations'.
  69
  70 * Added `-S' and `--skeleton'.
  71
  72 * `%raw', `-r', `--raw' is disabled.
  73
  74 * Special characters are escaped when output.  This solves the problems
  75   of the #line lines with path names including backslashes.
  76
  77 * New directives.
  78   `%yacc', `%fixed_output_files', `%defines', `%no_parser', `%verbose',
  79   `%debug', `%source_extension' and `%header_extension'.
  80
  81 * @$
  82   Automatic location tracking.
  83 \f
  84 Changes in version 1.28, 1999-07-06:
  85
  86 * Should compile better now with K&R compilers.
  87
  88 * Added NLS.
  89
  90 * Fixed a problem with escaping the double quote character.
  91
  92 * There is now a FAQ.
  93 \f
  94 Changes in version 1.27:
  95
  96 * The make rule which prevented bison.simple from being created on
  97   some systems has been fixed.
  98 \f
  99 Changes in version 1.26:
 100
 101 * Bison now uses automake.
 102
 103 * New mailing lists: <bug-bison@gnu.org> and <help-bison@gnu.org>.
 104
 105 * Token numbers now start at 257 as previously documented, not 258.
 106
 107 * Bison honors the TMPDIR environment variable.
 108
 109 * A couple of buffer overruns have been fixed.
 110
 111 * Problems when closing files should now be reported.
 112
 113 * Generated parsers should now work even on operating systems which do
 114   not provide alloca().
 115 \f
 116 Changes in version 1.25, 1995-10-16:
 117
 118 * Errors in the input grammar are not fatal; Bison keeps reading
 119 the grammar file, and reports all the errors found in it.
 120
 121 * Tokens can now be specified as multiple-character strings: for
 122 example, you could use "<=" for a token which looks like <=, instead
 123 of chosing a name like LESSEQ.
 124
 125 * The %token_table declaration says to write a table of tokens (names
 126 and numbers) into the parser file.  The yylex function can use this
 127 table to recognize multiple-character string tokens, or for other
 128 purposes.
 129
 130 * The %no_lines declaration says not to generate any #line preprocessor
 131 directives in the parser file.
 132
 133 * The %raw declaration says to use internal Bison token numbers, not
 134 Yacc-compatible token numbers, when token names are defined as macros.
 135
 136 * The --no-parser option produces the parser tables without including
 137 the parser engine; a project can now use its own parser engine.
 138 The actions go into a separate file called NAME.act, in the form of
 139 a switch statement body.
 140 \f
 141 Changes in version 1.23:
 142
 143 The user can define YYPARSE_PARAM as the name of an argument to be
 144 passed into yyparse.  The argument should have type void *.  It should
 145 actually point to an object.  Grammar actions can access the variable
 146 by casting it to the proper pointer type.
 147
 148 Line numbers in output file corrected.
 149 \f
 150 Changes in version 1.22:
 151
 152 --help option added.
 153 \f
 154 Changes in version 1.20:
 155
 156 Output file does not redefine const for C++.
 157
 158 Local Variables:
 159 mode: outline
 160 End: