Re: Documentation patch

[Akim Demaille]

| Hi!
| Here is another patch for the bison manual.  I've made some changes to the
| location part, but there's no example yet in the tutorial chapter.

OK.  Pease, install.

| And, Akim, it seems that bison.simple still uses the old YYLLOC_DEFAULT
| macro.

Bummer.  I must have missed something.

I leave this to you,  TIA :)  Oh, btw, don't forget to 2001 the header
comment.


|  Though grammar rules and semantic actions are enough to write a fully
|  functional parser, it can be useful to process some additionnal informations,
| -especially locations of tokens and groupings.
| +especially symbol locations.
| +
| address@hidden (terminal or not) ?

If `symbol' was clearly defined before, we don't need to recall it.


| +With this default action, the location tracking can be fully automatic. The

Maybe you shouldn't use `default action', which already has a fairly
specific meaning in the current context.

| +example above simply rewrites this way:
| +
| address@hidden
| address@hidden
| +exp:    @dots{}
| +        | exp '/' exp
| +            @{
| +              if ($3)
| +                $$ = $1 / $3;
| +              else
| +                @{
| +                  $$ = 1;
| +                  printf("Division by zero, l%d,c%d-l%d,c%d",
| +                         @@3.first_line, @@3.first_column,
| +                         @@3.last_line, @@3.last_column);
| +                @}
| +            @}
| address@hidden group
| address@hidden example

Be sure not to go to much to the right: check that `make dvi' makes it
fit properly.  I would promote

exp:   
   @dots{}
 | exp '/' exp
     @{
       if ($3)
         $$ = $1 / $3;
       else
         @{
           $$ = 1;
           printf("Division by zero, l%d,c%d-l%d,c%d",
                  @@3.first_line, @@3.first_column,
                  @@3.last_line, @@3.last_column);
         @}
     @}



Again, that's great job, thanks!