Hi, In my grammar I have 2 shift/reduce conflicts. I could find those by staring at my grammar until I find where I introduced it, but I thought I could learn to make use of Bison's nifty debugging -- the output file.
At the top of my .output file it says: State 118 conflicts: 2 shift/reduce And state 118 looks like this: --------------------------------------------------- state 118 72 SequenceType: ItemType . 73 | ItemType . STAR 74 | ItemType . PLUS 75 | ItemType . QUESTION_MARK PLUS shift, and go to state 134 STAR shift, and go to state 135 QUESTION_MARK shift, and go to state 136 PLUS [reduce using rule 72 (SequenceType)] STAR [reduce using rule 72 (SequenceType)] $default reduce using rule 72 (SequenceType) --------------------------------------------------- State 134, 135, and 136 looks all very similar. For example, state 134 looks like this: state 134 74 SequenceType: ItemType PLUS . $default reduce using rule 74 (SequenceType) I fail to understand what is the problem, and hence how to fix it. AFAICT, both (for example) state 134 and 118 reduces the tokens to a SequenceType. I don't see where the ambiguity is. I'm neither fully sure about what the brackets are communicating in state 118. Perhaps my confusion can be cleared from what I've written so far? For those interested, the grammar can be found here: http://websvn.kde.org/*checkout*/branches/work/kdom/xpath/impl/parser/Parser.output?rev=424401 http://websvn.kde.org/*checkout*/branches/work/kdom/xpath/impl/parser/Parser.ypp?rev=424401 Cheers, Frans _______________________________________________ Help-bison@gnu.org http://lists.gnu.org/mailman/listinfo/help-bison