|reg debugging shift/reduce and reduce/reduce conflicts firstname.lastname@example.org (2007-04-06)|
|Date:||6 Apr 2007 00:03:47 -0400|
|Posted-Date:||06 Apr 2007 00:03:47 EDT|
I'm trying to develop a parser for a vCard decoder, i'm using lex and
yacc. And to satisfy few type pf vCards i modifed a grammar and it
resulted in shift/reduce and reduce/reduce conflicts. I used -v option
of yacc to generate a y.output file and I was able to understand only
a bit of the file...
141: shift/reduce conflict (shift 221, red'n 239) on 10
I understand that the conflict is in 141 state and yacc is in a
confusion on token 10 as to whether shift to 221 state or reduce using
a rule 239...
this is followed by some grammar rules from Yacc and then followed
20 shift 239
200 reduce 239
67 shift 221
I do not understand this part at all... Please help me in debugging
Thanks in advance!!!
Return to the
Search the comp.compilers archives again.