3

�d[e��@s>dZd
dl
Z
d
dlZGdd�d�Zdd�ZGdd�de�ZdS)	z
Utilities.
�Nc@seZ
dZd
ZdZdd�ZdS)�from_z]
    Wrapper for delegating to a subgenerator.

    See `run_generator_with_yield_from`.
    �objcCs
|
|_dS)
N)
r)�selfr�r�/usr/lib/python3.6/util.py�__init__s
zfrom_.__init__N)
r)�__name__�
__module__�__qualname__�__doc__�	__slots__rrrrrrs
rc
cs�d
}
d
}|g
}x�|r�|
d
}}
|d
}}|d}y"|d
krF|j|�
}n
|j
|�}WnBtk
rp


|j�
wYnBtk
r�


tj�}
|j�
wYnXt|t�r�|j	|j
�

d
}qy
|V}Wqtk
r�


tj�}
YqXqW|
d
k	r�tj|
�
d
S)a�

    Iterate over a generator object with subgenerator delegation.

    This implements Python 3's ``yield from`` expressions, using Python 2
    syntax:

    >>> def subgen():
    ...     yield 'B'
    ...     yield 'C'
    ...
    >>> def gen():
    ...     yield 'A'
    ...     yield from_(subgen())
    ...     yield 'D'
    ...
    >>> list(run_generator_with_yield_from(gen()))
    ['A', 'B', 'C', 'D']

    Returning value from a subgenerator is not supported.
    N�
���)
�send�throw�
StopIteration�pop�
BaseException�sys�exc_info�
isinstancer�appendr�sixZreraise)�genr�value�stackZ
prev_exc_infoZ
prev_valuerrr�run_generator_with_yield_froms8
























rcs<eZ
dZ�f
d
d�Zdd�Zdd�Zdd�Zd	d
�Z�ZS)�InnerClassMetacs.|jd
d�
|jdd�
t
t|�j||
||�S)N�__outer_class__�__outer_name__)r�superr�__new__)�cls�name�basesZ
class_dict)
�	__class__rrr!Vs

zInnerClassMeta.__new__cCsp|j|�
\}}|
dkr|Sy
|
j
|Stk
rj


||
�
}y
|j}Wntk
rZ


|SX||
|�SYnXdS)
N)�_InnerClassMeta__bind�__dict__�KeyError�__get__�AttributeError)r"r�obj_type�outer_class�
outer_name�inner�getterrrrr)\s











zInnerClassMeta.__get__cCsx|j|
j
�
\}}||
�
}y
|j}WnFtk
rh


y
|j
Wntk
rZ


||
j|<Yn
Xtd
�
�
YnX||
|�
dS)N�__set__)r&r%r0r*�
__delete__r')r"rrr,r-r.�setterrrrr0ms









zInnerClassMeta.__set__cCs�|j|
j
�
\}}||
�
}y
|j}Wnftk
r�


y
|j
Wn>tk
rz


y|
j|=Wntk
rt


t|�
�
YnXYn
Xtd
�
�
Yn
X||
�

dS)Nr1)r&r%r1r*r0r'r()r"rr,r-r.�deleterrrrr1~s












zInnerClassMeta.__delete__cCs�y|jd
}|jd}Wn�t
k
r�


d\}}}x<|
jD]2}x"tj|j�
D]\}}||krLPqLW||kr:Pq:W||_||_dj|j|f�
|_|j|_	YnX||fS)Nrr�
.)NNN)
r'r(�__mro__rZ	iteritemsrr�joinrr
)r"r+r,r#rrrrZ__bind�s 















zInnerClassMeta.__bind)	rr	r
r!r)r0r1r&�
__classcell__rr)
r%rrTs
r)rrrrr�typerrrrr�<module>s
: