X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/f414d77d3876f559ac0af33285b9a9235f54a58f..bcb3effb3c88bd9310a2659a15cb05315950ef8f:/NEWS diff --git a/NEWS b/NEWS index b8bcae70..b6ab6934 100644 --- a/NEWS +++ b/NEWS @@ -1,10 +1,53 @@ Bison News ---------- -Changes in version 1.49c: +Changes in version 1.75a, 2002-10-24: +* Bison can no longer be built by a K&R C compiler; it requires C89 or + later to be built. This change originally took place a few versions + ago, but nobody noticed until we recently asked someone to try + building Bison with a K&R C compiler. -Changes in version 1.49b, 2002-08-12: +* %error-verbose + This new directive is preferred over YYERROR_VERBOSE. + +* %lex-param, %parse-param + These new directives are preferred over PARSE_PARAM and LEX_PARAM. + In addition, they provide a means for yyerror to remain pure, and + to access to the current location. + +Changes in version 1.75, 2002-10-14: + +* Bison should now work on 64-bit hosts. + +* Indonesian translation thanks to Tedi Heriyanto. + +* GLR parsers + Fix spurious parse errors. + +* Pure parsers + Some people redefine yyerror to steal yyparse' private variables. + Reenable this trick until an official feature replaces it. + +* Type Clashes + In agreement with POSIX and with other Yaccs, leaving a default + action is valid when $$ is untyped, and $1 typed: + + untyped: ... typed; + + but the converse remains an error: + + typed: ... untyped; + +* Values of mid-rule actions + The following code: + + foo: { ... } { $$ = $1; } ... + + was incorrectly rejected: $1 is defined in the second mid-rule + action, and is equal to the $$ of the first mid-rule action. + +Changes in version 1.50, 2002-10-04: * GLR parsing The declaration @@ -14,27 +57,30 @@ Changes in version 1.49b, 2002-08-12: %dprec and %merge on grammar rules allow parse-time resolution of ambiguities. Contributed by Paul Hilfinger. + Unfortunately Bison 1.50 does not work properly on 64-bit hosts + like the Alpha, so please stick to 32-bit hosts for now. + * Output Directory When not in Yacc compatibility mode, when the output file was not - specified, runnning `bison foo/bar.y' created `foo/bar.c'. It + specified, running `bison foo/bar.y' created `foo/bar.c'. It now creates `bar.c'. * Undefined token The undefined token was systematically mapped to 2 which prevented - the use of 2 from the user. This is no longer the case. + the use of 2 by the user. This is no longer the case. * Unknown token numbers - If yylex returned a code out of range, yyparse could die. This is + If yylex returned an out of range value, yyparse could die. This is no longer the case. * Error token - According to POSIX, the error token should be numbered as 256. + According to POSIX, the error token must be 256. Bison extends this requirement by making it a preference: *if* the user specified that one of her tokens is numbered 256, then error will be mapped onto another number. * Verbose error messages - They no longer report `..., expecting error or...' for state where + They no longer report `..., expecting error or...' for states where error recovery is possible. * End token @@ -110,12 +156,12 @@ Changes in version 1.49b, 2002-08-12: Croatian, thanks to Denis Lackovic. * Incorrect token definitions - When fed with `%token 'a' "A"', Bison used to output `#define 'a' 65'. + When given `%token 'a' "A"', Bison used to output `#define 'a' 65'. * Token definitions as enums Tokens are output both as the traditional #define's, and, provided the compiler supports ANSI C or is a C++ compiler, as enums. - This helps debuggers producing symbols instead of values. + This lets debuggers display names instead of integers. * Reports In addition to --verbose, bison supports --report=THINGS, which @@ -155,7 +201,6 @@ Changes in version 1.35, 2002-03-25: This kludge also addresses some C++ problems when the stack was extended. - Changes in version 1.34, 2002-03-12: