NEWS

   1 Bison News
   2 ----------
   3
   4 Changes in version 1.33a:
   5
   6 * Revert the C++ namespace changes introduced in 1.31, as they caused too
   7   many portability hassles.
   8
   9 * DJGPP support added.
  10
  11 * Fix portability problems within the test suite.
  12 \f
  13 Changes in version 1.33, 2002-02-07:
  14
  15 * Fix C++ issues
  16   Groff could not be compiled for the definition of size_t was lacking
  17   under some conditions.
  18
  19 * Catch invalid @n
  20   As is done with $n.
  21 \f
  22 Changes in version 1.32, 2002-01-23:
  23
  24 * Fix Yacc output file names
  25
  26 * Portability fixes
  27
  28 * Italian, Dutch translations
  29 \f
  30 Changes in version 1.31, 2002-01-14:
  31
  32 * Many Bug Fixes
  33
  34 * GNU Gettext and %expect
  35   GNU Gettext asserts 10 s/r conflicts, but there are 7.  Now that
  36   Bison dies on incorrect %expectations, we fear there will be
  37   too many bug reports for Gettext, so _for the time being_, %expect
  38   does not trigger an error when the input file is named `plural.y'.
  39
  40 * Use of alloca in parsers
  41   If YYSTACK_USE_ALLOCA is defined to 0, then the parsers will use
  42   malloc exclusively.  Since 1.29, but was not NEWS'ed.
  43
  44   alloca is used only when compiled with GCC, to avoid portability
  45   problems as on AIX.
  46
  47 * When the generated parser lacks debugging code, YYDEBUG is now 0
  48   (as POSIX requires) instead of being undefined.
  49
  50 * User Actions
  51   Bison has always permitted actions such as { $$ = $1 }: it adds the
  52   ending semicolon.  Now if in Yacc compatibility mode, the semicolon
  53   is no longer output: one has to write { $$ = $1; }.
  54
  55 * Better C++ compliance
  56   The output parsers try to respect C++ namespaces.
  57   [This turned out to be a failed experiment, and it was reverted later.]
  58
  59 * Reduced Grammars
  60   Fixed bugs when reporting useless nonterminals.
  61
  62 * 64 bit hosts
  63   The parsers work properly on 64 bit hosts.
  64
  65 * Error messages
  66   Some calls to strerror resulted in scrambled or missing error messages.
  67
  68 * %expect
  69   When the number of shift/reduce conflicts is correct, don't issue
  70   any warning.
  71
  72 * The verbose report includes the rule line numbers.
  73
  74 * Rule line numbers are fixed in traces.
  75
  76 * Swedish translation
  77
  78 * Parse errors
  79   Verbose parse error messages from the parsers are better looking.
  80   Before: parse error: unexpected `'/'', expecting `"number"' or `'-'' or `'(''
  81      Now: parse error: unexpected '/', expecting "number" or '-' or '('
  82
  83 * Fixed parser memory leaks.
  84   When the generated parser was using malloc to extend its stacks, the
  85   previous allocations were not freed.
  86
  87 * Fixed verbose output file.
  88   Some newlines were missing.
  89   Some conflicts in state descriptions were missing.
  90
  91 * Fixed conflict report.
  92   Option -v was needed to get the result.
  93
  94 * %expect
  95   Was not used.
  96   Mismatches are errors, not warnings.
  97
  98 * Fixed incorrect processing of some invalid input.
  99
 100 * Fixed CPP guards: 9foo.h uses BISON_9FOO_H instead of 9FOO_H.
 101
 102 * Fixed some typos in the documentation.
 103
 104 * %token MY_EOF 0 is supported.
 105   Before, MY_EOF was silently renumbered as 257.
 106
 107 * doc/refcard.tex is updated.
 108
 109 * %output, %file-prefix, %name-prefix.
 110   New.
 111
 112 * --output
 113   New, aliasing `--output-file'.
 114 \f
 115 Changes in version 1.30, 2001-10-26:
 116
 117 * `--defines' and `--graph' have now an optionnal argument which is the
 118   output file name. `-d' and `-g' do not change, they do not take any
 119   argument.
 120
 121 * `%source_extension' and `%header_extension' are removed, failed
 122   experiment.
 123
 124 * Portability fixes.
 125 \f
 126 Changes in version 1.29, 2001-09-07:
 127
 128 * The output file does not define const, as this caused problems when used
 129   with common autoconfiguration schemes.  If you still use ancient compilers
 130   that lack const, compile with the equivalent of the C compiler option
 131   `-Dconst='.  autoconf's AC_C_CONST macro provides one way to do this.
 132
 133 * Added `-g' and `--graph'.
 134
 135 * The Bison manual is now distributed under the terms of the GNU FDL.
 136
 137 * The input and the output files has automatically a similar extension.
 138
 139 * Russian translation added.
 140
 141 * NLS support updated; should hopefully be less troublesome.
 142
 143 * Added the old Bison reference card.
 144
 145 * Added `--locations' and `%locations'.
 146
 147 * Added `-S' and `--skeleton'.
 148
 149 * `%raw', `-r', `--raw' is disabled.
 150
 151 * Special characters are escaped when output.  This solves the problems
 152   of the #line lines with path names including backslashes.
 153
 154 * New directives.
 155   `%yacc', `%fixed_output_files', `%defines', `%no_parser', `%verbose',
 156   `%debug', `%source_extension' and `%header_extension'.
 157
 158 * @$
 159   Automatic location tracking.
 160 \f
 161 Changes in version 1.28, 1999-07-06:
 162
 163 * Should compile better now with K&R compilers.
 164
 165 * Added NLS.
 166
 167 * Fixed a problem with escaping the double quote character.
 168
 169 * There is now a FAQ.
 170 \f
 171 Changes in version 1.27:
 172
 173 * The make rule which prevented bison.simple from being created on
 174   some systems has been fixed.
 175 \f
 176 Changes in version 1.26:
 177
 178 * Bison now uses automake.
 179
 180 * New mailing lists: <bug-bison@gnu.org> and <help-bison@gnu.org>.
 181
 182 * Token numbers now start at 257 as previously documented, not 258.
 183
 184 * Bison honors the TMPDIR environment variable.
 185
 186 * A couple of buffer overruns have been fixed.
 187
 188 * Problems when closing files should now be reported.
 189
 190 * Generated parsers should now work even on operating systems which do
 191   not provide alloca().
 192 \f
 193 Changes in version 1.25, 1995-10-16:
 194
 195 * Errors in the input grammar are not fatal; Bison keeps reading
 196 the grammar file, and reports all the errors found in it.
 197
 198 * Tokens can now be specified as multiple-character strings: for
 199 example, you could use "<=" for a token which looks like <=, instead
 200 of chosing a name like LESSEQ.
 201
 202 * The %token_table declaration says to write a table of tokens (names
 203 and numbers) into the parser file.  The yylex function can use this
 204 table to recognize multiple-character string tokens, or for other
 205 purposes.
 206
 207 * The %no_lines declaration says not to generate any #line preprocessor
 208 directives in the parser file.
 209
 210 * The %raw declaration says to use internal Bison token numbers, not
 211 Yacc-compatible token numbers, when token names are defined as macros.
 212
 213 * The --no-parser option produces the parser tables without including
 214 the parser engine; a project can now use its own parser engine.
 215 The actions go into a separate file called NAME.act, in the form of
 216 a switch statement body.
 217 \f
 218 Changes in version 1.23:
 219
 220 The user can define YYPARSE_PARAM as the name of an argument to be
 221 passed into yyparse.  The argument should have type void *.  It should
 222 actually point to an object.  Grammar actions can access the variable
 223 by casting it to the proper pointer type.
 224
 225 Line numbers in output file corrected.
 226 \f
 227 Changes in version 1.22:
 228
 229 --help option added.
 230 \f
 231 Changes in version 1.20:
 232
 233 Output file does not redefine const for C++.
 234
 235 Local Variables:
 236 mode: outline
 237 End: