class EmitContext:
  def __init__(self):
    self._tmp_counter = 0
    self.current_function = None
    self.modules = set()
    # c_func_name → [param_names]; populated by emitter pre-pass
    self.functions = {}
    # source-level name / alias → c_func_name; populated by emitter pre-pass
    self.func_resolve = {}

  def fresh_tmp(self):
    name = f"_t{self._tmp_counter}"
    self._tmp_counter += 1
    return name

  def has_module(self, name):
    return name in self.modules