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Z
mZmZ ddlmZ G dd„ dejƒZdS )	až  Fixer for 'raise E, V'

From Armin Ronacher's ``python-modernize``.

raise         -> raise
raise E       -> raise E
raise E, 5    -> raise E(5)
raise E, 5, T -> raise E(5).with_traceback(T)
raise E, None, T -> raise E.with_traceback(T)

raise (((E, E'), E''), E'''), 5 -> raise E(5)
raise "foo", V, T               -> warns about string exceptions

raise E, (V1, V2) -> raise E(V1, V2)
raise E, (V1, V2), T -> raise E(V1, V2).with_traceback(T)


CAVEATS:
1) "raise E, V, T" cannot be translated safely in general. If V
   is not a tuple or a (number, string, None) literal, then:

   raise E, V, T -> from future.utils import raise_
                    raise_(E, V, T)
é    )ÚpytreeÚ
fixer_base)Útoken)ÚNameÚCallÚis_tupleÚCommaÚAttrÚArgList)Útouch_import_topc               @   s   e Zd ZdZdZdd„ ZdS )ÚFixRaiseTzB
    raise_stmt< 'raise' exc=any [',' val=any [',' tb=any]] >
    c       
      C   s–  | j }|d jƒ }|jtjkr2d}| j||ƒ d S t|ƒrbx t|ƒrZ|jd jd jƒ }q<W d|_d|krx|d jƒ }nd }d|k�rF|d jƒ }t|ƒr¾dd	„ |jdd… D ƒ}t	||ƒ}nˆ|jtj
tjfkräd
|_t	||gƒ}nb|jtjkrü|jdkrünJtdd|ƒ d
|_|tƒ |g}|d k	�r2|tƒ |g7 }t	tdƒ||jd�S |d k	�rrd
|_t|tdƒƒt|gƒg }	n|g}	tj|jtdƒg|	 |jd�S )NÚexcz+Python 3 does not support string exceptionsé   r   ú ÚtbÚvalc             S   s   g | ]}|j ƒ ‘qS © )Úclone)Ú.0Úcr   r   ú=/tmp/pip-build-6m2fasei/future/libfuturize/fixes/fix_raise.pyú
<listcomp>I   s    z&FixRaise.transform.<locals>.<listcomp>Ú ÚNonezfuture.utilsZraise_)ÚprefixÚwith_tracebackÚraiseéÿÿÿÿ)Úsymsr   Útyper   ÚSTRINGZcannot_convertr   Úchildrenr   r   ÚNUMBERÚNAMEÚvaluer   r   r   r	   r
   r   ÚNodeZ
raise_stmt)
ÚselfÚnodeÚresultsr   r   Úmsgr   r   ÚargsZexc_listr   r   r   Ú	transform*   sH    

	

zFixRaise.transformN)Ú__name__Ú
__module__Ú__qualname__ZBM_compatibleZPATTERNr+   r   r   r   r   r   #   s   r   N)Ú__doc__Zlib2to3r   r   Zlib2to3.pgen2r   Zlib2to3.fixer_utilr   r   r   r   r	   r
   Zlibfuturize.fixer_utilr   ZBaseFixr   r   r   r   r   Ú<module>   s
    