Re: y.output format

[Tim Van Holder]

> I am afraid however I get a shift/reduce conflict which I do not
understand.
>
> Where can I find a simple tutorial which explains the y.output file
format ?

Not sure about where there's a tutorial, but these steps should help:

1) look at the top portion of the .output file.  It should have a list
of
   all the states that have S/R conflicts
2) search the file for 'state XX' where XX is the number of a state that
   has a conflict.
   This should help you track down the state that has a problem.
3) The state's entry should make clear what bison is trying to do at
that
   point:

      foo . bar
      xyzzy . bar

   This means that bison in this state when it has just accepted either
the
   'foo' or the 'bar' token/rule, and is about to look for a 'bar'
token/rule.
   It also lists the tokens it can accept, and what it does if it finds
them.
   The reduces that cause a conflict with a shift should be listed in
angle
   brackets.  This should be enough to point to the actual problem.
   It takes a bit of practice, but you'll soon learn to quickly deduce
the
   problem from the information in the .output file.

Hope this helps.

Oh, and please don't post in HTML.  Thanks.