news: prepare for 2.8

[bison.git] / NEWS

diff --git a/NEWS b/NEWS
index a44e1beb15011cbf0c0a64f4c30f538d5f370de1..f4314c43bc98ba9f59b0d25fc7c2fa47b51b9d02 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -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 +27,30 @@ 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
+
+  Version 2.7 introduced caret errors, for a prettier output.  These are now
+  activated by default.  The old format can still be used by invoking Bison
+  with -fno-caret (or -fnone).
 
 *** Enhancements of the -Werror option
 
@@ -173,6 +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".
@@ -224,8 +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
@@ -234,6 +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
@@ -2259,7 +2297,7 @@ Output file does not redefine const for C++.
 
 -----
 
-Copyright (C) 1995-2012 Free Software Foundation, Inc.
+Copyright (C) 1995-2013 Free Software Foundation, Inc.
 
 This file is part of Bison, the GNU Parser Generator.