NEWS

   1 Bison News
   2 ----------
   3
   4 Changes in version 1.30f:
   5
   6 * Reduced Grammars
   7   Fixed bugs when reporting useless nonterminals.
   8
   9 Changes in version 1.30e:
  10
  11 * Error messages
  12   Some calls to strerror resulted in scrambled or missing error messages.
  13
  14 * %expect
  15   When the number of shift/reduce conflicts is correct, don't issue
  16   any warning.
  17
  18 * The verbose report includes the rule line numbers.
  19
  20 * Rule line numbers are fixed in traces.
  21
  22 Changes in version 1.30d:
  23
  24 * Swedish translation
  25
  26 * Parse errors
  27   Verbose parse error messages from the parsers are better looking.
  28   Before: parse error: unexpected `'/'', expecting `"number"' or `'-'' or `'(''
  29      Now: parse error: unexpected '/', expecting "number" or '-' or '('
  30
  31 * Fixed VCG output
  32   Was broken when strings aliases for symbols were used.
  33
  34 Changes in version 1.30c:
  35
  36 * Fixed a few warnings.
  37
  38 * Some portability issues.
  39
  40 Changes in version 1.30b:
  41
  42 * Fixed parser memory leaks.
  43   When the generated parser was using malloc to extend its stacks, the
  44   previous allocations were not freed.
  45
  46 * Fixed verbose output file.
  47   Some newlines were missing.
  48   Some conflicts in state descriptions were missing.
  49
  50 * Fixed conflict report.
  51   Option -v was needed to get the result.
  52
  53 * %expect
  54   Was not used.
  55   Mismatches are errors, not warnings.
  56
  57 * Fixed incorrect processing of some invalid input.
  58
  59 * Fixed CPP guards: 9foo.h uses BISON_9FOO_H instead of 9FOO_H.
  60
  61 * Fixed some typos in the documentation.
  62
  63 * %token MY_EOF 0 is supported.
  64   Before, MY_EOF was silently renumbered as 257.
  65
  66 * doc/refcard.tex is updated.
  67
  68 * %output, %file-prefix, %name-prefix.
  69   New.
  70
  71 * --output
  72   New, aliasing `--output-file'.
  73 \f
  74 Changes in version 1.30, 2001-10-26:
  75
  76 * `--defines' and `--graph' have now an optionnal argument which is the
  77   output file name. `-d' and `-g' do not change, they do not take any
  78   argument.
  79
  80 * `%source_extension' and `%header_extension' are removed, failed
  81   experiment.
  82
  83 * Portability fixes.
  84 \f
  85 Changes in version 1.29, 2001-09-07:
  86
  87 * The output file does not define const, as this caused problems when used
  88   with common autoconfiguration schemes.  If you still use ancient compilers
  89   that lack const, compile with the equivalent of the C compiler option
  90   `-Dconst='.  autoconf's AC_C_CONST macro provides one way to do this.
  91
  92 * Added `-g' and `--graph'.
  93
  94 * The Bison manual is now distributed under the terms of the GNU FDL.
  95
  96 * The input and the output files has automatically a similar extension.
  97
  98 * Russian translation added.
  99
 100 * NLS support updated; should hopefully be less troublesome.
 101
 102 * Added the old Bison reference card.
 103
 104 * Added `--locations' and `%locations'.
 105
 106 * Added `-S' and `--skeleton'.
 107
 108 * `%raw', `-r', `--raw' is disabled.
 109
 110 * Special characters are escaped when output.  This solves the problems
 111   of the #line lines with path names including backslashes.
 112
 113 * New directives.
 114   `%yacc', `%fixed_output_files', `%defines', `%no_parser', `%verbose',
 115   `%debug', `%source_extension' and `%header_extension'.
 116
 117 * @$
 118   Automatic location tracking.
 119 \f
 120 Changes in version 1.28, 1999-07-06:
 121
 122 * Should compile better now with K&R compilers.
 123
 124 * Added NLS.
 125
 126 * Fixed a problem with escaping the double quote character.
 127
 128 * There is now a FAQ.
 129 \f
 130 Changes in version 1.27:
 131
 132 * The make rule which prevented bison.simple from being created on
 133   some systems has been fixed.
 134 \f
 135 Changes in version 1.26:
 136
 137 * Bison now uses automake.
 138
 139 * New mailing lists: <bug-bison@gnu.org> and <help-bison@gnu.org>.
 140
 141 * Token numbers now start at 257 as previously documented, not 258.
 142
 143 * Bison honors the TMPDIR environment variable.
 144
 145 * A couple of buffer overruns have been fixed.
 146
 147 * Problems when closing files should now be reported.
 148
 149 * Generated parsers should now work even on operating systems which do
 150   not provide alloca().
 151 \f
 152 Changes in version 1.25, 1995-10-16:
 153
 154 * Errors in the input grammar are not fatal; Bison keeps reading
 155 the grammar file, and reports all the errors found in it.
 156
 157 * Tokens can now be specified as multiple-character strings: for
 158 example, you could use "<=" for a token which looks like <=, instead
 159 of chosing a name like LESSEQ.
 160
 161 * The %token_table declaration says to write a table of tokens (names
 162 and numbers) into the parser file.  The yylex function can use this
 163 table to recognize multiple-character string tokens, or for other
 164 purposes.
 165
 166 * The %no_lines declaration says not to generate any #line preprocessor
 167 directives in the parser file.
 168
 169 * The %raw declaration says to use internal Bison token numbers, not
 170 Yacc-compatible token numbers, when token names are defined as macros.
 171
 172 * The --no-parser option produces the parser tables without including
 173 the parser engine; a project can now use its own parser engine.
 174 The actions go into a separate file called NAME.act, in the form of
 175 a switch statement body.
 176 \f
 177 Changes in version 1.23:
 178
 179 The user can define YYPARSE_PARAM as the name of an argument to be
 180 passed into yyparse.  The argument should have type void *.  It should
 181 actually point to an object.  Grammar actions can access the variable
 182 by casting it to the proper pointer type.
 183
 184 Line numbers in output file corrected.
 185 \f
 186 Changes in version 1.22:
 187
 188 --help option added.
 189 \f
 190 Changes in version 1.20:
 191
 192 Output file does not redefine const for C++.
 193
 194 Local Variables:
 195 mode: outline
 196 End: