- print "SHIFT/REDUCE Conflict on state {self.number} {self.name} for token {t}:"
- for i in a do print "\t{i}"
- for i in guarded_shift[t] do print "\t{i}"
+ var ri = a.first
+ var confs = new Array[Item]
+ var ress = new Array[String]
+ var g = guarded_shift[t]
+ for si in lookahead(ri) do
+ if si.next != t then continue
+ if not g.has(si) then
+ confs.add(si)
+ continue
+ end
+ var p = ri.alt.prod
+ var csi: nullable Item = null
+ for bsi in back_expand(si) do
+ if bsi.alt.prod == p then
+ csi = bsi
+ break
+ end
+ end
+ if csi == null then
+ confs.add(si)
+ continue
+ end
+ ress.add "\tshift: {si}"
+ if si != csi then
+ ress.add "\tcore shift: {csi}"
+ end
+ end
+ if confs.is_empty then
+ print "Automatic Dangling on state {self.number} {self.name} for token {t}:"
+ print "\treduce: {ri}"
+ for r in ress do print r
+ removed_reduces.add t
+ else
+ print "SHIFT/REDUCE Conflict on state {self.number} {self.name} for token {t}:"
+ print "\treduce: {ri}"
+ for i in guarded_shift[t] do print "\tshift: {i}"
+ removed_reduces.add t
+ end