|byacc help needed thewalt@ce.Berkeley.EDU (1992-11-22)|
|Re: byacc help needed firstname.lastname@example.org (1992-11-23)|
|From:||thewalt@ce.Berkeley.EDU (C. Thewalt)|
|Organization:||Dept. of Civil Engineering, University of California, Berkeley|
|Date:||Sun, 22 Nov 1992 17:43:03 GMT|
|Keywords:||yacc, errors, question, comment|
I tried to reach the author of byacc (email@example.com) 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
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?
Christopher Robin Thewalt (firstname.lastname@example.org)
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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