
    n9e                         d dl Z ddZy)    Nc                     t         t              r  j                  dd      j                           fd}dj	                  d  D              }dj                  ||rd|z  nd |       |	      }|rt        |       d
dlm} t        |d      }	 t        ||       ||   S # t        $ r }t        t        |      dz   |z         |d}~ww xY w)a  
    Produces a class that either can be used standalone or as a base class for persistent classes.

    This is a thin wrapper around a named tuple.

    Constructing a type and using it to instantiate objects:

    >>> Point = immutable('x, y', name='Point')
    >>> p = Point(1, 2)
    >>> p2 = p.set(x=3)
    >>> p
    Point(x=1, y=2)
    >>> p2
    Point(x=3, y=2)

    Inheriting from a constructed type. In this case no type name needs to be supplied:

    >>> class PositivePoint(immutable('x, y')):
    ...     __slots__ = tuple()
    ...     def __new__(cls, x, y):
    ...         if x > 0 and y > 0:
    ...             return super(PositivePoint, cls).__new__(cls, x, y)
    ...         raise Exception('Coordinates must be positive!')
    ...
    >>> p = PositivePoint(1, 2)
    >>> p.set(x=3)
    PositivePoint(x=3, y=2)
    >>> p.set(y=-3)
    Traceback (most recent call last):
    Exception: Coordinates must be positive!

    The persistent class also supports the notion of frozen members. The value of a frozen member
    cannot be updated. For example it could be used to implement an ID that should remain the same
    over time. A frozen member is denoted by a trailing underscore.

    >>> Point = immutable('x, y, id_', name='Point')
    >>> p = Point(1, 2, id_=17)
    >>> p.set(x=3)
    Point(x=3, y=2, id_=17)
    >>> p.set(id_=18)
    Traceback (most recent call last):
    AttributeError: Cannot set frozen members id_
    , c                      D  cg c]  } | j                  d      sd| z   }} |r!dj                  dj                  |            S yc c} w )N_'%s'z
        frozen_fields = fields_to_modify & set([{frozen_members}])
        if frozen_fields:
            raise AttributeError('Cannot set frozen members %s' % ', '.join(frozen_fields))
            , )frozen_members )endswithformatjoin)fr
   memberss     7/usr/lib/python3/dist-packages/pyrsistent/_immutable.pyfrozen_member_testz%immutable.<locals>.frozen_member_test4   sT    .5IC&1*II dii&?@	A  Js
   A
A
r	   c              3   &   K   | ]	  }d |z    yw)r   N ).0ms     r   	<genexpr>zimmutable.<locals>.<genexpr>?   s     ;avz;s   aq  
class {class_name}(namedtuple('ImmutableBase', [{quoted_members}])):
    __slots__ = tuple()

    def __repr__(self):
        return super({class_name}, self).__repr__().replace('ImmutableBase', self.__class__.__name__)

    def set(self, **kwargs):
        if not kwargs:
            return self

        fields_to_modify = set(kwargs.keys())
        if not fields_to_modify <= {member_set}:
            raise AttributeError("'%s' is not a member" % ', '.join(fields_to_modify - {member_set}))

        {frozen_member_test}

        return self.__class__.__new__(self.__class__, *map(kwargs.pop, [{quoted_members}], self))
z	set([%s])zset())quoted_members
member_setr   
class_namer   )
namedtuplepyrsistent_immutable)r   __name__z:
N)
isinstancestrreplacesplitr   r   printcollectionsr   dictexecSyntaxError)	r   nameverboser   r   templater   	namespacees	   `        r   	immutabler,      s    Z '3//#s+113	 YY;7;;N$ F.:H+6g"4"6   % . h&
5KLI<Xy! T?  <#a&5.834!;<s   B" "	C+CC)r   	ImmutableF)sysr,   r       r   <module>r0      s    
]r/   