# Source code for cattrs.preconf.pyyaml

    """Preconfigured converters for pyyaml."""
    from datetime import datetime
    from typing import Any, Type, TypeVar

    from yaml import safe_dump, safe_load

    from cattrs._compat import FrozenSetSubscriptable

    from ..converters import BaseConverter, Converter
    from . import validate_datetime

    T = TypeVar("T")

    class PyyamlConverter(Converter):

        def dumps(self, obj: Any, unstructure_as=None, **kwargs) -> str:
            return safe_dump(self.unstructure(obj, unstructure_as=unstructure_as), **kwargs)

        def loads(self, data: str, cl: Type[T]) -> T:
            return self.structure(safe_load(data), cl)

    def configure_converter(converter: BaseConverter):
        """
        Configure the converter for use with the pyyaml library.

        * frozensets are serialized as lists
        * string enums are converted into strings explicitly
        """
        converter.register_unstructure_hook(
            str, lambda v: v if v.__class__ is str else v.value
        )
        converter.register_structure_hook(datetime, validate_datetime)

    def make_converter(*args, **kwargs) -> PyyamlConverter:
        kwargs["unstruct_collection_overrides"] = {
            **kwargs.get("unstruct_collection_overrides", {}),
            FrozenSetSubscriptable: list,
        }
        res = PyyamlConverter(*args, **kwargs)
        configure_converter(res)

        return res