code: func String(in []byte, pos int) (int, error) {
  	pos, err := skipSpace(in, pos)
  	if err != nil {
  		return 0, err
  	}
  
  	max := len(in)
  
  	if v := in[pos]; v != '"' {
  		return 0, newError(pos, v)
  	}
  	pos++
  
  	for {
  		switch in[pos] {
  		case '\\':
  			if in[pos+1] == '"' {
  				pos++
  			}
  		case '"':
  			return pos + 1, nil
  		}
  		pos++
  
  		if pos >= max {
  			break
  		}
  	}
  
  	return 0, errors.New("unclosed string")
  }
docs: // String returns the position of the string that begins at the specified pos