U


W[!
�@stdZd
dl
mZmZ
d
dlZd
dlmZ
d
dlmZm	Z	
dd�Z
dd	�Zd
d�Ze
e	e�e
e�e�dd
��
�
Z
dS)zD
Utilities to assist in the "flag day" new-style object transition.
�)�absolute_import�divisionN)
�wraps)�_shouldEnableNewStyle�_PY3cs��
fd
d�}|S)a2

    If C{condition}, replace this function with C{alternative}.

    @param condition: A L{bool} which says whether this should be replaced.

    @param alternative: An alternative function that will be swapped in instead
        of the original, if C{condition} is truthy.

    @return: A decorator.
    c
sF�d
kr�
�n �dkr|�ntd�
t��
�
�
�
t|�
�f
dd��
}
|
S)NTFz8condition argument to _replaceIf requires a bool, not {}cs
�||
�
S)
N�)�args�kwargs�
�callr�:/usr/lib/python3/dist-packages/twisted/python/_oldstyle.py�wrapped'sz._replaceIf.<locals>.decorator.<locals>.wrapped)�
ValueError�format�reprr)�funcr
��alternative�	conditionr
r�	decorators



�
z_replaceIf.<locals>.decoratorr)rrrrrr�
_replaceIfsrc


Cs|S)
z]
    Return C{arg}. Do nothing.

    @param arg: The arg to return.

    @return: C{arg}
    r)
�argrrr�passthru1src
Cs2t|�
t
jk	r.d
dlm}

tdj|
|�
d�
�
�
|S)z�
    Ensure that C{cls} is an old-style class.

    @param cls: The class to check.

    @return: The class, if it is an old-style class.
    @raises: L{ValueError} if it is a new-style class.
    r
)
�fullyQualifiedNamez�twisted.python._oldstyle._oldStyle is being used to decorate a new-style class ({cls}). This should only be used to decorate old-style classes.)
�cls)�type�typesZ	ClassTypeZtwisted.python.reflectrrr)rrrrr�_ensureOldClass=s	

��rc
Cs$t|�

|j
tf
}
t|j|
|j�S)
a�

    A decorator which conditionally converts old-style classes to new-style
    classes. If it is Python 3, or if the C{TWISTED_NEWSTYLE} environment
    variable has a falsey (C{no}, C{false}, C{False}, or C{0}) value in the
    environment, this decorator is a no-op.

    @param cls: An old-style class to convert to new-style.
    @type cls: L{types.ClassType}

    @return: A new-style version of C{cls}.
    )r�	__bases__�objectr�__name__�__dict__)rZ_basesrrr�	_oldStyleSs

r")�__doc__Z
__future__rrr�	functoolsrZtwisted.python.compatrrrrrr"rrrr�<module>s