code: def infer_stan_dtypes(stan_code):
      """Infer Stan integer variables from generated quantities block."""
      # Remove old deprecated comments
      stan_code = "\n".join(
          line if "#" not in line else line[: line.find("#")]
          for line in stan_code.splitlines()
      )
      pattern_remove_comments = re.compile(
          r'//.*?$|/\*.*?\*/|\'(?:\\.|[^\\\'])*\'|"(?:\\.|[^\\"])*"',
          re.DOTALL | re.MULTILINE,
      )
      stan_code = re.sub(pattern_remove_comments, "", stan_code)
  
      # Check generated quantities
      if "generated quantities" not in stan_code:
          return {}
  
      # Extract generated quantities block
      gen_quantities_location = stan_code.index("generated quantities")
      block_start = gen_quantities_location + stan_code[
          gen_quantities_location:
      ].index("{")
  
      curly_bracket_count = 0
      block_end = None
      for block_end, char in enumerate(
          stan_code[block_start:], block_start + 1
      ):
          if char == "{":
              curly_bracket_count += 1
          elif char == "}":
              curly_bracket_count -= 1
  
              if curly_bracket_count == 0:
                  break
  
      stan_code = stan_code[block_start:block_end]
  
      stan_integer = r"int"
      stan_limits = r"(?:\<[^\>]+\>)*"  # ignore group: 0 or more <....>
      stan_param = r"([^;=\s\[]+)"  # capture group: ends= ";", "=", "[" or whitespace
      stan_ws = r"\s*"  # 0 or more whitespace
      stan_ws_one = r"\s+"  # 1 or more whitespace
      pattern_int = re.compile(
          "".join(
              (
                  stan_integer,
                  stan_ws_one,
                  stan_limits,
                  stan_ws,
                  stan_param,
              )
          ),
          re.IGNORECASE,
      )
      dtypes = {
          key.strip(): "int"
          for key in re.findall(pattern_int, stan_code)
      }
      return dtypes
  
imports: import datetime
  import functools
  import importlib
  import re
  import warnings
  from copy import deepcopy
  from typing import Any, Callable, Dict, List, Optional, Tuple, TypeVar, Union
  import numpy
  import xarray
  from ..None import __version__, utils
  from ..rcparams import rcParams
label_desc: Use image node_id 7 for calling a global function with example usage: infer_stan_dtypes(stan_code) and returns: dtypes, dict