func (a *subAllocator) succContext(i int32) *context {
	if i <= 0 {
		return nil
	}
	return &context{i: i, s: a.states[i : i+2 : i+2], a: a}
}
func (a *subAllocator) succContext(i int32) *context {
	if i <= 0 {
		return nil
	}
	return &context{i: i, s: a.states[i : i+2 : i+2], a: a}
}
func ( a * subAllocator ) succContext ( i int32 ) * context { if i <= 0 { return nil } return & context { i : i , s : a . states [ i : i + 2 : i + 2 ] , a : a } }
// succContext returns a context given a state.succ index
succContext returns a context given a state . succ index