X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/cd5bd6ac4f0ee29eec5efd5c4659a29c37527c23..491bdd7ae5956e775b6aaf8a8b1a32bc77b4a17d:/NEWS diff --git a/NEWS b/NEWS index 988894ec..7abc9511 100644 --- a/NEWS +++ b/NEWS @@ -1,7 +1,154 @@ Bison News ---------- -Changes in version 1.28a: +Changes in version 1.49a: + +* Large grammars + Are now supported (large token numbers, large grammar size (= sum of + the LHS and RHS lengths). + +* The initial rule is explicit. + Bison used to play hacks with the initial rule, which the user does + not write. It is now explicit, and visible in the reports and + graphs as rule 0. + +* Useless rules are actually removed. + Before, Bison reported the useless rules, but, although not used, + included them in the parsers. + +* False `Token not used' report fixed. + On a grammar such as + + %token useless useful + %% + exp: '0' %prec useful; + + where a token was used to set the precedence of the last rule, + bison reported both `useful' and `useless' as useless tokens. + +* Revert the C++ namespace changes introduced in 1.31, as they caused too + many portability hassles. + +* Items overflow + Bison no longer dumps core when there are too many items, it just + dies. + +* Token end-of-file + The token end of file may be specified by the user, in which case, + the user symbol is used in the reports, the graphs, and the verbose + error messages instead of `$', which remains being the defaults. + For instance + %token YYEOF 0 + or + %token YYEOF 0 "end of file" + +Changes in version 1.31, 2002-01-14: + +* Many Bug Fixes + +* GNU Gettext and %expect + GNU Gettext asserts 10 s/r conflicts, but there are 7. Now that + Bison dies on incorrect %expectations, we fear there will be + too many bug reports for Gettext, so _for the time being_, %expect + does not trigger an error when the input file is named `plural.y'. + +* Use of alloca in parsers + If YYSTACK_USE_ALLOCA is defined to 0, then the parsers will use + malloc exclusively. Since 1.29, but was not NEWS'ed. + + alloca is used only when compiled with GCC, to avoid portability + problems as on AIX. + +* When the generated parser lacks debugging code, YYDEBUG is now 0 + (as POSIX requires) instead of being undefined. + +* User Actions + Bison has always permitted actions such as { $$ = $1 }: it adds the + ending semicolon. Now if in Yacc compatibility mode, the semicolon + is no longer output: one has to write { $$ = $1; }. + +* Better C++ compliance + The output parsers try to respect C++ namespaces. + +* Reduced Grammars + Fixed bugs when reporting useless nonterminals. + +* 64 bit hosts + The parsers work properly on 64 bit hosts. + +* Error messages + Some calls to strerror resulted in scrambled or missing error messages. + +* %expect + When the number of shift/reduce conflicts is correct, don't issue + any warning. + +* The verbose report includes the rule line numbers. + +* Rule line numbers are fixed in traces. + +* Swedish translation + +* Parse errors + Verbose parse error messages from the parsers are better looking. + Before: parse error: unexpected `'/'', expecting `"number"' or `'-'' or `'('' + Now: parse error: unexpected '/', expecting "number" or '-' or '(' + +* Fixed parser memory leaks. + When the generated parser was using malloc to extend its stacks, the + previous allocations were not freed. + +* Fixed verbose output file. + Some newlines were missing. + Some conflicts in state descriptions were missing. + +* Fixed conflict report. + Option -v was needed to get the result. + +* %expect + Was not used. + Mismatches are errors, not warnings. + +* Fixed incorrect processing of some invalid input. + +* Fixed CPP guards: 9foo.h uses BISON_9FOO_H instead of 9FOO_H. + +* Fixed some typos in the documentation. + +* %token MY_EOF 0 is supported. + Before, MY_EOF was silently renumbered as 257. + +* doc/refcard.tex is updated. + +* %output, %file-prefix, %name-prefix. + New. + +* --output + New, aliasing `--output-file'. + +Changes in version 1.30: + +* `--defines' and `--graph' have now an optionnal argument which is the + output file name. `-d' and `-g' do not change, they do not take any + argument. + +* `%source_extension' and `%header_extension' are removed, failed + experiment. + +* Portability fixes. + +Changes in version 1.29, 2001-09-07: + +* The output file does not define const, as this caused problems when used + with common autoconfiguration schemes. If you still use ancient compilers + that lack const, compile with the equivalent of the C compiler option + `-Dconst='. autoconf's AC_C_CONST macro provides one way to do this. + +* Added `-g' and `--graph'. + +* The Bison manual is now distributed under the terms of the GNU FDL. + +* The input and the output files has automatically a similar extension. * Russian translation added. @@ -13,14 +160,19 @@ Changes in version 1.28a: * Added `-S' and `--skeleton'. +* `%raw', `-r', `--raw' is disabled. + * Special characters are escaped when output. This solves the problems of the #line lines with path names including backslashes. * New directives. - `%yacc', `%fixed_output_files', `%defines', `%no_parser', `%verbose', and - `%debug'. + `%yacc', `%fixed_output_files', `%defines', `%no_parser', `%verbose', + `%debug', `%source_extension' and `%header_extension'. + +* @$ + Automatic location tracking. -Changes in version 1.28: +Changes in version 1.28, 1999-07-06: * Should compile better now with K&R compilers. @@ -52,7 +204,7 @@ Changes in version 1.26: * Generated parsers should now work even on operating systems which do not provide alloca(). -Changes in version 1.25: +Changes in version 1.25, 1995-10-16: * Errors in the input grammar are not fatal; Bison keeps reading the grammar file, and reports all the errors found in it. @@ -93,3 +245,7 @@ Changes in version 1.22: Changes in version 1.20: Output file does not redefine const for C++. + +Local Variables: +mode: outline +End: