def _make_lazy()

in chz/blueprint/_blueprint.py [0:0]

• 33 lines of code
• 7 McCabe index (conditional complexity)

    def _make_lazy(self) -> _MakeResult:
        all_params: dict[str, _Param] = {}
        used_args: set[tuple[str, int]] = set()
        meta_factory_value: dict[str, Any] = {}
        missing_params: list[str] = []

        value_mapping: dict[str, Evaluatable] | ConstructionIssue | None
        value_mapping = _construct_param(
            self.param,
            "",
            self._arg_map,
            all_params=all_params,
            used_args=used_args,
            meta_factory_value=meta_factory_value,
            missing_params=missing_params,
        )
        if isinstance(value_mapping, ConstructionIssue):
            raise ConstructionException(value_mapping.issue)

        if value_mapping is None:
            # value_mapping is None if _construct_param / _construct_unspecified_param
            # wants us to fallback to the default or thinks we're missing required arguments
            # This is sort of equivalent to what happens in _construct_factory
            unspecified_factory = self.meta_factory.unspecified_factory()
            if unspecified_factory is None:
                raise ConstructionException(
                    f"Cannot construct {self.target} because it has no unspecified factory"
                )
            value_mapping = {"": Thunk(unspecified_factory, {})}
            if "" in missing_params:
                missing_params.remove("")

        return _MakeResult(
            value_mapping=value_mapping,
            all_params=all_params,
            used_args=used_args,
            meta_factory_value=meta_factory_value,
            missing_params=missing_params,
        )