TODO and NEWS

[Akim Demaille]

Index: NEWS
===================================================================
RCS file: /cvsroot/bison/bison/NEWS,v
retrieving revision 1.71
diff -u -u -r1.71 NEWS
--- NEWS 7 Nov 2002 07:07:25 -0000 1.71
+++ NEWS 7 Nov 2002 13:56:16 -0000
@@ -16,6 +16,9 @@
   In addition, they provide a means for yyerror to remain pure, and
   to access to the current location.
 
+  #defining yyerror to steal internal variables is strongly
+  discouraged.  It is not guaranteed to work for ever.
+
 * #line
   Bison now recognizes #line in its input, and forwards them.
 
Index: TODO
===================================================================
RCS file: /cvsroot/bison/bison/TODO,v
retrieving revision 1.86
diff -u -u -r1.86 TODO
--- TODO 6 Nov 2002 14:11:46 -0000 1.86
+++ TODO 7 Nov 2002 13:56:17 -0000
@@ -17,8 +17,8 @@
 
 
 * Documentation
-Before releasing, make sure the documentation refers to the current
-`output' format.
+Before releasing, make sure the documentation ("Understanding your
+parser") refers to the current `output' format.
 
 
 * GLR & C++
@@ -52,10 +52,40 @@
 
 * Extensions
 
-** yyerror, yysymprint interface
+** %destructor
+I think we should document it as experimental, and allow its use in
+the next releases.  But we also need to port it to GLR.  What about
+lalr1.cc?  Well, read what Hans reported, maybe we don't want
+%detructor.  On the other hand, there is no reason not to provide it:
+users can avoid its use.
+
+** $foo
+Have a look at the Lemon parser generator: instead of $1, $2 etc. they
+can name the values.  This is much more pleasant.  For instance:
+
+       exp (res): exp (a) '+' exp (b) { $res = $a + $b; };
+
+I love this.  I have been bitten too often by the removal of the
+symbol, and forgetting to shift all the $n to $n-1.  If you are
+unlucky, it compiles...
+
+** $-1
+We should find a means to provide an access to values deep in the
+stack.  For instance, instead of
+
+       baz: qux { $$ = $<foo>-1 + $<bar>0 + $1; }
+
+we should be able to have:
+
+  foo($foo) bar($bar) baz($bar): qux($qux) { $baz = $foo + $bar + $qux; }
+
+Or something like this.
+
+
+** yysymprint interface
 It should be improved, in particular when using Bison features such as
-locations, and YYPARSE_PARAMS.  For the time being, it is recommended
-to #define yyerror and yyprint to steal internal variables...
+locations, and YYPARSE_PARAMS.  For the time being, it is almost
+recommended to yyprint to steal internal variables...
 
 ** Several %unions
 I think this is a pleasant (but useless currently) feature, but in the