X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/9553083c729070877095948ba2d48553690ac9e9..5320fffdd88676a57c42427f3db06d36d10d5a8c:/NEWS diff --git a/NEWS b/NEWS index 0552ba21..fd749368 100644 --- a/NEWS +++ b/NEWS @@ -2,9 +2,18 @@ GNU Bison NEWS * Noteworthy changes in release ?.? (????-??-??) [?] +** Incompatible changes + +*** Obsolete features + + Support for YYFAIL is removed (deprecated in Bison 2.4.2). + Support for yystype and yyltype (instead of YYSTYPE and YYLTYPE) + is removed (deprecated in Bison 1.875). + Support for YYPARSE_PARAM is removed (deprecated in Bison 1.875). + ** Warnings -*** Warning categories are now displayed in warnings +*** Warning categories are now displayed For instance: @@ -74,7 +83,19 @@ GNU Bison NEWS Also, it is possible to add code to the parser's constructors using "%code init" and "%define init_throws". -** C++ skeleton improvements +** C++ skeletons improvements + +*** parser header (%defines) is no longer mandatory (lalr1.cc) + + In which case, if needed, the support classes are defined in the generated + parser, instead of additional files (location.hh, position.hh and + stack.hh). + +*** locations are no longer mandatory (lalr1.cc, glr.cc) + + Both lalr1.cc and glr.cc no longer require %location. + +*** syntax_error exception (lalr1.cc) The C++ parser features a syntax_error exception, which can be thrown from the scanner or from user rules to raise syntax errors. @@ -122,14 +143,68 @@ GNU Bison NEWS * Noteworthy changes in release ?.? (????-??-??) [?] -* Noteworthy changes in release 2.5.90 (2012-07-05) [beta] +* Noteworthy changes in release 2.6.2 (2012-08-03) [stable] + +** Bug fixes + + Buffer overruns, complaints from Flex, and portability issues in the test + suite have been fixed. + +** Spaces in %lex- and %parse-param (lalr1.cc, glr.cc) + + Trailing end-of-lines in %parse-param or %lex-param would result in + invalid C++. This is fixed. + +** Spurious spaces and end-of-lines + + The generated files no longer end (nor start) with empty lines. + +* Noteworthy changes in release 2.6.1 (2012-07-30) [stable] + + Bison no longer executes user-specified M4 code when processing a grammar. + +** Future Changes + + In addition to the removal of the features announced in Bison 2.6, the + next major release will remove the "Temporary hack for adding a semicolon + to the user action", as announced in the release 2.5. Instead of: + + exp: exp "+" exp { $$ = $1 + $3 }; + + write: + + exp: exp "+" exp { $$ = $1 + $3; }; + +** Bug fixes + +*** Type names are now properly escaped. + +*** glr.cc: set_debug_level and debug_level work as expected. + +*** Stray @ or $ in actions + + While Bison used to warn about stray $ or @ in action rules, it did not + for other actions such as printers, destructors, or initial actions. It + now does. + +** Type names in actions + + For consistency with rule actions, it is now possible to qualify $$ by a + type-name in destructors, printers, and initial actions. For instance: + + %printer { fprintf (yyo, "(%d, %f)", $$, $$); } <*> <>; + + will display two values for each typed and untyped symbol (provided + that YYSTYPE has both "ival" and "fval" fields). + +* Noteworthy changes in release 2.6 (2012-07-19) [stable] ** Future changes: The next major release of Bison will drop support for the following deprecated features. Please report disagreements to bug-bison@gnu.org. -*** K&C parsers +*** K&R C parsers Support for generating parsers in K&R C will be removed. Parsers generated for C support ISO C90, and are tested with ISO C99 and ISO C11