NEWS

   1 Bison News
   2 ----------
   3
   4 Changes in version 1.30l:
   5
   6 * Package fixes
   7   Missing portability files.
   8
   9 Changes in version 1.30k:
  10
  11 * Portability
  12   The AIX portability issue seems to be solved: strnlen was the
  13   culprit.
  14
  15 Changes in version 1.30j:
  16
  17 * GNU Gettext and %expect
  18   GNU Gettext asserts 10 s/r conflicts, but there are 7.  Now that
  19   Bison dies on incorrect %expectations, we fear there will be
  20   too many bug reports for Gettext, so _for the time being_, %expect
  21   does not trigger an error when the input file is named `plural.y'.
  22
  23 Changes in version 1.30i:
  24
  25 * Use of alloca in parsers
  26   If YYSTACK_USE_ALLOCA is defined to 0, then the parsers will use
  27   malloc exclusively.  Since 1.29, but was not NEWS'ed.
  28
  29   alloca is used only when compiled with GCC, to avoid portability
  30   problems as on AIX.
  31
  32 * Bug fixes
  33
  34 Changes in version 1.30h:
  35
  36 * When the generated parser lacks debugging code, YYDEBUG is now 0
  37   (as POSIX requires) instead of being undefined.
  38
  39 * User Actions
  40   Bison has always permitted actions such as { $$ = $1 }: it adds the
  41   ending semicolon.  Now if in Yacc compatibility mode, the semicolon
  42   is no longer output: one has to write { $$ = $1; }.
  43
  44 Changes in version 1.30g:
  45
  46 * Bug fixes
  47
  48 * Better C++ compliance
  49   The output parsers try to respect C++ namespaces.
  50
  51 Changes in version 1.30f:
  52
  53 * Reduced Grammars
  54   Fixed bugs when reporting useless nonterminals.
  55
  56 * 64 bit hosts
  57   The parsers work properly on 64 bit hosts.
  58
  59 Changes in version 1.30e:
  60
  61 * Error messages
  62   Some calls to strerror resulted in scrambled or missing error messages.
  63
  64 * %expect
  65   When the number of shift/reduce conflicts is correct, don't issue
  66   any warning.
  67
  68 * The verbose report includes the rule line numbers.
  69
  70 * Rule line numbers are fixed in traces.
  71
  72 Changes in version 1.30d:
  73
  74 * Swedish translation
  75
  76 * Parse errors
  77   Verbose parse error messages from the parsers are better looking.
  78   Before: parse error: unexpected `'/'', expecting `"number"' or `'-'' or `'(''
  79      Now: parse error: unexpected '/', expecting "number" or '-' or '('
  80
  81 * Fixed VCG output
  82   Was broken when strings aliases for symbols were used.
  83
  84 Changes in version 1.30c:
  85
  86 * Fixed a few warnings.
  87
  88 * Some portability issues.
  89
  90 Changes in version 1.30b:
  91
  92 * Fixed parser memory leaks.
  93   When the generated parser was using malloc to extend its stacks, the
  94   previous allocations were not freed.
  95
  96 * Fixed verbose output file.
  97   Some newlines were missing.
  98   Some conflicts in state descriptions were missing.
  99
 100 * Fixed conflict report.
 101   Option -v was needed to get the result.
 102
 103 * %expect
 104   Was not used.
 105   Mismatches are errors, not warnings.
 106
 107 * Fixed incorrect processing of some invalid input.
 108
 109 * Fixed CPP guards: 9foo.h uses BISON_9FOO_H instead of 9FOO_H.
 110
 111 * Fixed some typos in the documentation.
 112
 113 * %token MY_EOF 0 is supported.
 114   Before, MY_EOF was silently renumbered as 257.
 115
 116 * doc/refcard.tex is updated.
 117
 118 * %output, %file-prefix, %name-prefix.
 119   New.
 120
 121 * --output
 122   New, aliasing `--output-file'.
 123 \f
 124 Changes in version 1.30, 2001-10-26:
 125
 126 * `--defines' and `--graph' have now an optionnal argument which is the
 127   output file name. `-d' and `-g' do not change, they do not take any
 128   argument.
 129
 130 * `%source_extension' and `%header_extension' are removed, failed
 131   experiment.
 132
 133 * Portability fixes.
 134 \f
 135 Changes in version 1.29, 2001-09-07:
 136
 137 * The output file does not define const, as this caused problems when used
 138   with common autoconfiguration schemes.  If you still use ancient compilers
 139   that lack const, compile with the equivalent of the C compiler option
 140   `-Dconst='.  autoconf's AC_C_CONST macro provides one way to do this.
 141
 142 * Added `-g' and `--graph'.
 143
 144 * The Bison manual is now distributed under the terms of the GNU FDL.
 145
 146 * The input and the output files has automatically a similar extension.
 147
 148 * Russian translation added.
 149
 150 * NLS support updated; should hopefully be less troublesome.
 151
 152 * Added the old Bison reference card.
 153
 154 * Added `--locations' and `%locations'.
 155
 156 * Added `-S' and `--skeleton'.
 157
 158 * `%raw', `-r', `--raw' is disabled.
 159
 160 * Special characters are escaped when output.  This solves the problems
 161   of the #line lines with path names including backslashes.
 162
 163 * New directives.
 164   `%yacc', `%fixed_output_files', `%defines', `%no_parser', `%verbose',
 165   `%debug', `%source_extension' and `%header_extension'.
 166
 167 * @$
 168   Automatic location tracking.
 169 \f
 170 Changes in version 1.28, 1999-07-06:
 171
 172 * Should compile better now with K&R compilers.
 173
 174 * Added NLS.
 175
 176 * Fixed a problem with escaping the double quote character.
 177
 178 * There is now a FAQ.
 179 \f
 180 Changes in version 1.27:
 181
 182 * The make rule which prevented bison.simple from being created on
 183   some systems has been fixed.
 184 \f
 185 Changes in version 1.26:
 186
 187 * Bison now uses automake.
 188
 189 * New mailing lists: <bug-bison@gnu.org> and <help-bison@gnu.org>.
 190
 191 * Token numbers now start at 257 as previously documented, not 258.
 192
 193 * Bison honors the TMPDIR environment variable.
 194
 195 * A couple of buffer overruns have been fixed.
 196
 197 * Problems when closing files should now be reported.
 198
 199 * Generated parsers should now work even on operating systems which do
 200   not provide alloca().
 201 \f
 202 Changes in version 1.25, 1995-10-16:
 203
 204 * Errors in the input grammar are not fatal; Bison keeps reading
 205 the grammar file, and reports all the errors found in it.
 206
 207 * Tokens can now be specified as multiple-character strings: for
 208 example, you could use "<=" for a token which looks like <=, instead
 209 of chosing a name like LESSEQ.
 210
 211 * The %token_table declaration says to write a table of tokens (names
 212 and numbers) into the parser file.  The yylex function can use this
 213 table to recognize multiple-character string tokens, or for other
 214 purposes.
 215
 216 * The %no_lines declaration says not to generate any #line preprocessor
 217 directives in the parser file.
 218
 219 * The %raw declaration says to use internal Bison token numbers, not
 220 Yacc-compatible token numbers, when token names are defined as macros.
 221
 222 * The --no-parser option produces the parser tables without including
 223 the parser engine; a project can now use its own parser engine.
 224 The actions go into a separate file called NAME.act, in the form of
 225 a switch statement body.
 226 \f
 227 Changes in version 1.23:
 228
 229 The user can define YYPARSE_PARAM as the name of an argument to be
 230 passed into yyparse.  The argument should have type void *.  It should
 231 actually point to an object.  Grammar actions can access the variable
 232 by casting it to the proper pointer type.
 233
 234 Line numbers in output file corrected.
 235 \f
 236 Changes in version 1.22:
 237
 238 --help option added.
 239 \f
 240 Changes in version 1.20:
 241
 242 Output file does not redefine const for C++.
 243
 244 Local Variables:
 245 mode: outline
 246 End: