mirror of
https://git.savannah.gnu.org/git/bison.git
synced 2026-04-24 10:39:38 +00:00
Akim Demaille
b7c49edf13
reductions, then output the report anyway if requested, then die. * src/symtab.c (bucket_new): Initialize `value' to -1, not 0. * src/reader.c (eoftoken): New. (parse_token_decl): If the token being defined has value `0', it is the eoftoken. (packsymbols): No longer hack `tags' to insert `$' by hand. Be sure to preserve the value of the eoftoken. (reader): Make sure eoftoken is defined. Initialize nsyms to 0: now eoftoken is created just like the others. * src/print.c (print_grammar): Don't special case the eof token. * src/regression.at: Adjust: `$' has value 0, not -1, which was a lie anyway, albeit pleasant. * tests/calc.at: Exercise error messages with eoftoken. Change the grammar so that empty input is invalid. Adjust expectations. When yyungeting, be sure to use a valid yylloc: use last_yylloc.
142 lines
3.9 KiB
Plaintext
142 lines
3.9 KiB
Plaintext
Bison News
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----------
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Changes in version 1.49a:
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* Items overflow
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Bison no longer dumps core when there are too many items, it just
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dies.
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* Token end-of-file
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The token end of file may be specified by the user, in which case,
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the user symbol is used in the reports, the graphs, and the verbose
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error messages instead of `$', which remains being the defaults.
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For instance
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%token YYEOF 0
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or
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%token YYEOF 0 "end of file"
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Changes in version 1.30:
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* `--defines' and `--graph' have now an optionnal argument which is the
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output file name. `-d' and `-g' do not change, they do not take any
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argument.
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* `%source_extension' and `%header_extension' are removed, failed
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experiment.
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* Portability fixes.
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Changes in version 1.29, 2001-09-07:
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* The output file does not define const, as this caused problems when used
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with common autoconfiguration schemes. If you still use ancient compilers
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that lack const, compile with the equivalent of the C compiler option
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`-Dconst='. autoconf's AC_C_CONST macro provides one way to do this.
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* Added `-g' and `--graph'.
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* The Bison manual is now distributed under the terms of the GNU FDL.
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* The input and the output files has automatically a similar extension.
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* Russian translation added.
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* NLS support updated; should hopefully be less troublesome.
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* Added the old Bison reference card.
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* Added `--locations' and `%locations'.
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* Added `-S' and `--skeleton'.
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* `%raw', `-r', `--raw' is disabled.
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* Special characters are escaped when output. This solves the problems
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of the #line lines with path names including backslashes.
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* New directives.
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`%yacc', `%fixed_output_files', `%defines', `%no_parser', `%verbose',
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`%debug', `%source_extension' and `%header_extension'.
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* @$
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Automatic location tracking.
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Changes in version 1.28, 1999-07-06:
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* Should compile better now with K&R compilers.
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* Added NLS.
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* Fixed a problem with escaping the double quote character.
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* There is now a FAQ.
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Changes in version 1.27:
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* The make rule which prevented bison.simple from being created on
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some systems has been fixed.
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Changes in version 1.26:
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* Bison now uses automake.
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* New mailing lists: <bug-bison@gnu.org> and <help-bison@gnu.org>.
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* Token numbers now start at 257 as previously documented, not 258.
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* Bison honors the TMPDIR environment variable.
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* A couple of buffer overruns have been fixed.
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* Problems when closing files should now be reported.
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* Generated parsers should now work even on operating systems which do
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not provide alloca().
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Changes in version 1.25, 1995-10-16:
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* Errors in the input grammar are not fatal; Bison keeps reading
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the grammar file, and reports all the errors found in it.
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* Tokens can now be specified as multiple-character strings: for
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example, you could use "<=" for a token which looks like <=, instead
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of chosing a name like LESSEQ.
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* The %token_table declaration says to write a table of tokens (names
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and numbers) into the parser file. The yylex function can use this
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table to recognize multiple-character string tokens, or for other
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purposes.
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* The %no_lines declaration says not to generate any #line preprocessor
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directives in the parser file.
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* The %raw declaration says to use internal Bison token numbers, not
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Yacc-compatible token numbers, when token names are defined as macros.
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* The --no-parser option produces the parser tables without including
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the parser engine; a project can now use its own parser engine.
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The actions go into a separate file called NAME.act, in the form of
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a switch statement body.
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Changes in version 1.23:
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The user can define YYPARSE_PARAM as the name of an argument to be
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passed into yyparse. The argument should have type void *. It should
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actually point to an object. Grammar actions can access the variable
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by casting it to the proper pointer type.
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Line numbers in output file corrected.
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Changes in version 1.22:
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--help option added.
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Changes in version 1.20:
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Output file does not redefine const for C++.
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Local Variables:
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mode: outline
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End:
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