NEWS

   1 Bison News
   2 ----------
   3
   4 Changes in version 1.33a:
   5
   6 \f
   7 Changes in version 1.33, 2002-02-07:
   8
   9 * Fix C++ issues
  10   Groff could not be compiled for the definition of size_t was lacking
  11   under some conditions.
  12
  13 * Catch invalid @n
  14   As is done with $n.
  15 \f
  16 Changes in version 1.32, 2002-01-23:
  17
  18 * Fix Yacc output file names
  19
  20 * Portability fixes
  21
  22 * Italian, Dutch translations
  23 \f
  24 Changes in version 1.31, 2002-01-14:
  25
  26 * Many Bug Fixes
  27
  28 * GNU Gettext and %expect
  29   GNU Gettext asserts 10 s/r conflicts, but there are 7.  Now that
  30   Bison dies on incorrect %expectations, we fear there will be
  31   too many bug reports for Gettext, so _for the time being_, %expect
  32   does not trigger an error when the input file is named `plural.y'.
  33
  34 * Use of alloca in parsers
  35   If YYSTACK_USE_ALLOCA is defined to 0, then the parsers will use
  36   malloc exclusively.  Since 1.29, but was not NEWS'ed.
  37
  38   alloca is used only when compiled with GCC, to avoid portability
  39   problems as on AIX.
  40
  41 * When the generated parser lacks debugging code, YYDEBUG is now 0
  42   (as POSIX requires) instead of being undefined.
  43
  44 * User Actions
  45   Bison has always permitted actions such as { $$ = $1 }: it adds the
  46   ending semicolon.  Now if in Yacc compatibility mode, the semicolon
  47   is no longer output: one has to write { $$ = $1; }.
  48
  49 * Better C++ compliance
  50   The output parsers try to respect C++ namespaces.
  51
  52 * Reduced Grammars
  53   Fixed bugs when reporting useless nonterminals.
  54
  55 * 64 bit hosts
  56   The parsers work properly on 64 bit hosts.
  57
  58 * Error messages
  59   Some calls to strerror resulted in scrambled or missing error messages.
  60
  61 * %expect
  62   When the number of shift/reduce conflicts is correct, don't issue
  63   any warning.
  64
  65 * The verbose report includes the rule line numbers.
  66
  67 * Rule line numbers are fixed in traces.
  68
  69 * Swedish translation
  70
  71 * Parse errors
  72   Verbose parse error messages from the parsers are better looking.
  73   Before: parse error: unexpected `'/'', expecting `"number"' or `'-'' or `'(''
  74      Now: parse error: unexpected '/', expecting "number" or '-' or '('
  75
  76 * Fixed parser memory leaks.
  77   When the generated parser was using malloc to extend its stacks, the
  78   previous allocations were not freed.
  79
  80 * Fixed verbose output file.
  81   Some newlines were missing.
  82   Some conflicts in state descriptions were missing.
  83
  84 * Fixed conflict report.
  85   Option -v was needed to get the result.
  86
  87 * %expect
  88   Was not used.
  89   Mismatches are errors, not warnings.
  90
  91 * Fixed incorrect processing of some invalid input.
  92
  93 * Fixed CPP guards: 9foo.h uses BISON_9FOO_H instead of 9FOO_H.
  94
  95 * Fixed some typos in the documentation.
  96
  97 * %token MY_EOF 0 is supported.
  98   Before, MY_EOF was silently renumbered as 257.
  99
 100 * doc/refcard.tex is updated.
 101
 102 * %output, %file-prefix, %name-prefix.
 103   New.
 104
 105 * --output
 106   New, aliasing `--output-file'.
 107 \f
 108 Changes in version 1.30, 2001-10-26:
 109
 110 * `--defines' and `--graph' have now an optionnal argument which is the
 111   output file name. `-d' and `-g' do not change, they do not take any
 112   argument.
 113
 114 * `%source_extension' and `%header_extension' are removed, failed
 115   experiment.
 116
 117 * Portability fixes.
 118 \f
 119 Changes in version 1.29, 2001-09-07:
 120
 121 * The output file does not define const, as this caused problems when used
 122   with common autoconfiguration schemes.  If you still use ancient compilers
 123   that lack const, compile with the equivalent of the C compiler option
 124   `-Dconst='.  autoconf's AC_C_CONST macro provides one way to do this.
 125
 126 * Added `-g' and `--graph'.
 127
 128 * The Bison manual is now distributed under the terms of the GNU FDL.
 129
 130 * The input and the output files has automatically a similar extension.
 131
 132 * Russian translation added.
 133
 134 * NLS support updated; should hopefully be less troublesome.
 135
 136 * Added the old Bison reference card.
 137
 138 * Added `--locations' and `%locations'.
 139
 140 * Added `-S' and `--skeleton'.
 141
 142 * `%raw', `-r', `--raw' is disabled.
 143
 144 * Special characters are escaped when output.  This solves the problems
 145   of the #line lines with path names including backslashes.
 146
 147 * New directives.
 148   `%yacc', `%fixed_output_files', `%defines', `%no_parser', `%verbose',
 149   `%debug', `%source_extension' and `%header_extension'.
 150
 151 * @$
 152   Automatic location tracking.
 153 \f
 154 Changes in version 1.28, 1999-07-06:
 155
 156 * Should compile better now with K&R compilers.
 157
 158 * Added NLS.
 159
 160 * Fixed a problem with escaping the double quote character.
 161
 162 * There is now a FAQ.
 163 \f
 164 Changes in version 1.27:
 165
 166 * The make rule which prevented bison.simple from being created on
 167   some systems has been fixed.
 168 \f
 169 Changes in version 1.26:
 170
 171 * Bison now uses automake.
 172
 173 * New mailing lists: <bug-bison@gnu.org> and <help-bison@gnu.org>.
 174
 175 * Token numbers now start at 257 as previously documented, not 258.
 176
 177 * Bison honors the TMPDIR environment variable.
 178
 179 * A couple of buffer overruns have been fixed.
 180
 181 * Problems when closing files should now be reported.
 182
 183 * Generated parsers should now work even on operating systems which do
 184   not provide alloca().
 185 \f
 186 Changes in version 1.25, 1995-10-16:
 187
 188 * Errors in the input grammar are not fatal; Bison keeps reading
 189 the grammar file, and reports all the errors found in it.
 190
 191 * Tokens can now be specified as multiple-character strings: for
 192 example, you could use "<=" for a token which looks like <=, instead
 193 of chosing a name like LESSEQ.
 194
 195 * The %token_table declaration says to write a table of tokens (names
 196 and numbers) into the parser file.  The yylex function can use this
 197 table to recognize multiple-character string tokens, or for other
 198 purposes.
 199
 200 * The %no_lines declaration says not to generate any #line preprocessor
 201 directives in the parser file.
 202
 203 * The %raw declaration says to use internal Bison token numbers, not
 204 Yacc-compatible token numbers, when token names are defined as macros.
 205
 206 * The --no-parser option produces the parser tables without including
 207 the parser engine; a project can now use its own parser engine.
 208 The actions go into a separate file called NAME.act, in the form of
 209 a switch statement body.
 210 \f
 211 Changes in version 1.23:
 212
 213 The user can define YYPARSE_PARAM as the name of an argument to be
 214 passed into yyparse.  The argument should have type void *.  It should
 215 actually point to an object.  Grammar actions can access the variable
 216 by casting it to the proper pointer type.
 217
 218 Line numbers in output file corrected.
 219 \f
 220 Changes in version 1.22:
 221
 222 --help option added.
 223 \f
 224 Changes in version 1.20:
 225
 226 Output file does not redefine const for C++.
 227
 228 Local Variables:
 229 mode: outline
 230 End: