NEWS

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