NEWS

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