# mode: run

# tag: closures

# ticket: 596

def simple(a, b):

    """

    >>> kls = simple(1, 2)

    >>> kls().result()

    3

    """

    class Foo:

        def result(self):

            return a + b

    return Foo

def nested_classes(a, b):

    """

    >>> kls = nested_classes(1, 2)

    >>> kls().result(-3)

    0

    """

    class Foo:

        class Bar:

            def result(self, c):

                return a + b + c

    return Foo.Bar

def staff(a, b):

    """

    >>> kls = staff(1, 2)

    >>> kls.static()

    (1, 2)

    >>> kls.klass()

    ('Foo', 1, 2)

    >>> obj = kls()

    >>> obj.member()

    (1, 2)

    """

    class Foo:

        def member(self):

            return a, b

        @staticmethod

        def static():

            return a, b

        @classmethod

        def klass(cls):

            return cls.__name__, a, b

    return Foo

def nested2(a):

    """

    >>> obj = nested2(1)

    >>> f = obj.run(2)

    >>> f()

    3

    """

    class Foo:

        def run(self, b):

            def calc():

                return a + b

            return calc

    return Foo()