You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: stream.go
    path of file: ./repos/gojq/cli
    
    the code of the file until where you have to start completion: package cli

import (
	"encoding/json"
	"io"
)

type jsonStream struct {
	dec    *json.Decoder
	path   []any
	states []int
}

func newJSONStream(dec *json.Decoder) *jsonStream {
	return &jsonStream{dec: dec, states: []int{jsonStateTopValue}, path: []any{}}
}

const (
	jsonStateTopValue = iota
	jsonStateArrayStart
	jsonStateArrayValue
	jsonStateArrayEnd
	jsonStateArrayEmptyEnd
	jsonStateObjectStart
	jsonStateObjectKey
	jsonStateObjectValue
    
func (s *jsonStream) next() (any, error) {
	switch s.states[len(s.states)-1] {
	case jsonStateArrayEnd, jsonStateObjectEnd:
		s.path = s.path[:len(s.path)-1]
		fallthrough
	case jsonStateArrayEmptyEnd, jsonStateObjectEmptyEnd:
		s.states = s.states[:len(s.states)-1]
	}
	if s.dec.More() {
		switch s.states[len(s.states)-1] {
		case jsonStateArrayValue:
			s.path[len(s.path)-1] = s.path[len(s.path)-1].(int) + 1
		case jsonStateObjectValue:
			s.path = s.path[:len(s.path)-1]
		}
	}
	for {
		token, err := s.dec.Token()
		if err != nil {
			if err == io.EOF && s.states[len(s.states)-1] != jsonStateTopValue {
				err = io.ErrUnexpectedEOF
			}
			return nil, err
		}
		if d, ok := token.(json.Delim); ok {
			switch d {
			case '[', '{':
				switch s.states[len(s.states)-1] {
				case jsonStateArrayStart:
					s.states[len(s.states)-1] = jsonStateArrayValue
				case jsonStateObjectKey:
					s.states[len(s.states)-1] = jsonStateObjectValue
				}
				if d == '[' {
					s.states = append(s.states, jsonStateArrayStart)
					s.path = append(s.path, 0)
				} else {
					s.states = append(s.states, jsonStateObjectStart)
				}
			case ']':
				if s.states[len(s.states)-1] == jsonStateArrayStart {
					s.states[len(s.states)-1] = jsonStateArrayEmptyEnd
					s.path = s.path[:len(s.path)-1]
					return []any{s.copyPath(), []any{}}, nil
				}
				s.states[len(s.states)-1] = jsonStateArrayEnd
				return []any{s.copyPath()}, nil
			case '}':
				if s.states[len(s.states)-1] == jsonStateObjectStart {
					s.states[len(s.states)-1] = jsonStateObjectEmptyEnd
					return []any{s.copyPath(), map[string]any{}}, nil
				}
				s.states[len(s.states)-1] = jsonStateObjectEnd
				return []any{s.copyPath()}, nil
			default:
				panic(d)
			}
		} else {
			switch s.states[len(s.states)-1] {
			case jsonStateArrayStart:
				s.states[len(s.states)-1] = jsonStateArrayValue
				fallthrough
			case jsonStateArrayValue:
				return []any{s.copyPath(), token}, nil
			case jsonStateObjectStart, jsonStateObjectValue:
				s.states[len(s.states)-1] = jsonStateObjectKey
				s.path = append(s.path, token)
			case jsonStateObjectKey:
				s.states[len(s.states)-1] = jsonStateObjectValue
				return []any{s.copyPath(), token}, nil
			default:
				s.states[len(s.states)-1] = jsonStateTopValue
				return []any{s.copyPath(), token}, nil
			}
		}
	}
}