      cdef void push(self) nogil:
          self._stack[self._s_i] = self.B(0)
          self._s_i += 1
          self._b_i += 1
          if self._b_i >= self._break:
              self._break = -1
  
      cdef void pop(self) nogil:
          self._s_i -= 1
  
 
</s> remove     cdef void set_break(self, int i) nogil:
        if 0 <= i < self.length:
            self._sent[i].sent_end = True
            self._break = i
 </s> add     cdef void set_break(self, int _) nogil:
        self._sent[self.B(0)].sent_end = True
        self._break = self._b_i </s> remove             elif self.buffer_length() >= 2 and self.stack_depth() == 0:
 </s> add             elif (self.length - self._b_i) >= 1 and self.stack_depth() == 0: </s> remove         # When we break, we can't reach any arcs between stack and buffer
        # So cost is number of deps between S0...Sn and B0...Nn
        cdef int cost = 0
        cdef int i, j, B_i, S_i
        for i in range(s.buffer_length()):
            B_i = s.B(i)
            for j in range(s.stack_depth()):
                S_i = s.S(j)
                cost += gold.heads[B_i] == S_i
                cost += gold.heads[S_i] == B_i
        return cost
 </s> add         # Check for sentence boundary --- if it's here, we can't have any deps
        # between stack and buffer, so rest of action is irrelevant.
        s0_root = _get_root(s.S(0), gold)
        b0_root = _get_root(s.B(0), gold)
        if s0_root == -1 or b0_root == -1 or s0_root != b0_root:
            return 0
        else:
            return 1
        if self._b_i > self._break:
      cdef void push(self) nogil:
          self._stack[self._s_i] = self.B(0)
          self._s_i += 1
          self._b_i += 1
        if self._b_i > self._break:
              self._break = -1
  
      cdef void pop(self) nogil:
          self._s_i -= 1
  
keep keep keep keep replace keep keep keep keep keep
 * Fixes to unshift/fast-forward strategy. Getting 91.55 greedy on NW dev, gold preproc 
spacy/syntax/stateclass.pyx