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news: prepare for 2.8

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* NEWS: Restructure.
Name contributors.
This commit is contained in:
Akim Demaille
2013-01-25 16:30:56 +01:00
parent 56b91ae0b1
commit 597afd73d7
1 changed files with 35 additions and 15 deletions
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NEWS
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@@ -2,6 +2,19 @@ GNU Bison NEWS
* Noteworthy changes in release ?.? (????-??-??) [?]
** Future changes
Bison will stop adding a semicolon at the end of the actions:
foo.y:2.22: warning: a ';' might be needed at the end of action code
exp: "num" { $$ = $1 }
^
foo.y:2.22: future versions of Bison will not add the ';'
Like other GNU packages, Bison will start using some of the C99 features
for its own code, especially the definition of variables after statements.
The generated C parsers still aim at C90.
** Incompatible changes
*** Obsolete features
@@ -14,7 +27,24 @@ GNU Bison NEWS
Support for YYLEX_PARAM and YYPARSE_PARAM is removed (deprecated in Bison
1.875): use %lex-param, %parse-param, or %param.
** Warnings
** Bug fixes
*** The epilogue is no longer affected by internal #defines
The glr.c skeleton uses defines such as #define yylval (yystackp->yyval) in
generated code. These weren't properly undefined before the inclusion of
the user epilogue, so functions such as the following were butchered by the
preprocessor expansion:
int yylex (YYSTYPE *yylval);
This is has been fixed: yylval, yynerrs, yychar, and yylloc are now valid
identifiers for user-provided variables.
** Diagnostics reported by Bison
Most of these features were contributed by Théophile Ranquet and Victor
Santet.
*** Carets
@@ -179,6 +209,8 @@ GNU Bison NEWS
** Java skeleton improvements
Contributed by Paolo Bonzini.
The constants for token names were moved to the Lexer interface. Also, it
is possible to add code to the parser's constructors using "%code init"
and "%define init_throws".
@@ -204,18 +236,6 @@ GNU Bison NEWS
used by the scanner, or rejecting invalid combinations from a
factory invoked by the user actions).
*** The epilogue is no longer affected by internal #defines
The glr.c skeleton uses defines such as #define yylval (yystackp->yyval) in
generated code. These weren't properly undefined before the inclusion of
the user epilogue, so functions such as the following were butchered by the
preprocessor expansion:
int yylex (YYSTYPE *yylval);
This is has been fixed: yylval, yynerrs, yychar, and yylloc are now valid
identifiers for user-provided variables.
** Renamed %define variables
The following variables have been renamed for consistency. Backward
@@ -242,8 +262,6 @@ GNU Bison NEWS
use these prefixed token names, although the grammar itself still
uses the short names (as in the sample rule given above).
** Variable parse.error
This variable controls the verbosity of error messages. The use of the
@@ -252,6 +270,8 @@ GNU Bison NEWS
** Semantic predicates
Contributed by Paul Hilfinger.
The new, experimental, semantic-predicate feature allows actions of the
form "%?{ BOOLEAN-EXPRESSION }", which cause syntax errors (as for
YYERROR) if the expression evaluates to 0, and are evaluated immediately