Merge branch 'maint'

[bison.git] / NEWS

diff --git a/NEWS b/NEWS
index 1d4e0fa138537c0a17861ab6067f9adb549dda79..fd1cadd4c4dc7dcf16cedc28137e1b4748485af5 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -39,25 +39,24 @@ GNU Bison NEWS
   Yacc-like behavior (e.g., always generate y.tab.c), but to report
   incompatibilities as warnings: "-y -Wno-error=yacc".
 
-*** Warning categories are now displayed and prefix changes
+*** The display of warnings is now richer
 
-  For instance:
+  The option that controls a given warning is now displayed:
 
-  foo.y:4.6: warning: type clash on default action: <foo> != <bar> [-Wother]
+    foo.y:4.6: warning: type clash on default action: <foo> != <bar> [-Wother]
 
-  In the case of warnings treated as errors, the suffix is displayed, in a
-  manner similar to gcc, as [-Werror=CATEGORY]. Also, the prefix is changed
-  from "warning: " to "error: ".
+  In the case of warnings treated as errors, the prefix is changed from
+  "warning: " to "error: ", and the suffix is displayed, in a manner similar
+  to gcc, as [-Werror=CATEGORY].
 
-  For instance, considering the above change, an output for -Werror=other
-  would have been:
+  For instance, where the previous version of Bison would report (and exit
+  with failure):
 
     bison: warnings being treated as errors
-    input.y:1.1: warning: stray ',' treated as white space [-Wother]
+    input.y:1.1: warning: stray ',' treated as white space
 
-  But it is actually:
+  it now reports:
 
-    bison: warnings being treated as errors
     input.y:1.1: error: stray ',' treated as white space [-Werror=other]
 
 *** Deprecated constructs
@@ -251,7 +250,9 @@ GNU Bison NEWS
   Incorrect definitions of YY_, issued by yacc.c when no parser header is
   generated, are removed.
 
-** Changes in the format of errors and exceptions output
+  All the generated headers are self-contained.
+
+** Changes in the format of error messages
 
   This used to be the format of many error reports:
 
@@ -263,6 +264,17 @@ GNU Bison NEWS
     foo.y:5.10-25: result type clash on merge function 'merge': <t3> != <t2>
     foo.y:4.13-27:     previous declaration
 
+** Header guards (yacc.c, glr.c, glr.cc)
+
+  In order to avoid collisions, the header guards are now
+  YY_<PREFIX>_<FILE>_INCLUDED, instead of merely <PREFIX>_<FILE>.
+  For instance the header generated from
+
+    %define api.prefix "calc"
+    %defines "lib/parse.h"
+
+  will use YY_CALC_LIB_PARSE_H_INCLUDED as guard.
+
 * Noteworthy changes in release 2.6.2 (2012-08-03) [stable]
 
 ** Bug fixes
@@ -2121,7 +2133,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
  LocalWords:  Automake TMPDIR LESSEQ ylwrap endif yydebug YYTOKEN YYLSP ival hh
  LocalWords:  extern YYTOKENTYPE TOKENTYPE yytokentype tokentype STYPE lval pdf
  LocalWords:  lang yyoutput dvi html ps POSIX lvalp llocp Wother nterm arg init
- LocalWords:  TOK
+ LocalWords:  TOK calc yyo fval
 
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