byacc help needed

I tried to reach the author of byacc (corbett@berkeley.edu) but that
account is dead, so I'd appreciate the help of any yacc experts out there,
byacc in particular.


It appears that the parse state in y.tab.c is controlled by a few scalar
variables. If this is the case, it would seem possible to squirrel away
copies and do a setjmp whenever we are in an acceptable state, and when
syntax errors occur do a longjmp back to the saved state and reset the
variables.


I'd really like to do this on a line by line basis, and in the event of a
syntax error on a line eat input to the newline and then reset at the
state of the previous line.


Is this feasible?


Chris
thewalt@ce.berkeley.edu
--
Christopher Robin Thewalt (thewalt@ce.berkeley.edu)
Dept. of Civil Engineering, University of California, Berkeley
[It might be possible, but I'd think it'd be a lot easier to use the yacc
``error'' token. Corbett's address as of July is Robert.Corbett@Eng.Sun.COM
but he no longer actively supports byacc. -John]
--

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