U
    |cg                     @   s2   d dl mZ dgZG dd dZG dd dZdS )    refWeakSetc                   @   s$   e Zd Zdd Zdd Zdd ZdS )_IterationGuardc                 C   s   t || _d S N)r   weakcontainer)selfr    r	   lib/python3.8/_weakrefset.py__init__   s    z_IterationGuard.__init__c                 C   s    |   }|d k	r|j|  | S r   )r   
_iteratingadd)r   wr	   r	   r
   	__enter__   s    z_IterationGuard.__enter__c                 C   s0   |   }|d k	r,|j}||  |s,|  d S r   )r   r   remove_commit_removals)r   etbr   sr	   r	   r
   __exit__   s    
z_IterationGuard.__exit__N)__name__
__module____qualname__r   r   r   r	   r	   r	   r
   r   
   s   r   c                   @   s  e Zd Zd@ddZdd Zdd Zdd	 Zd
d Zdd Zdd Z	dd Z
dd Zdd Zdd Zdd Zdd Zdd Zdd ZeZd d! Zd"d# Zd$d% ZeZd&d' Zd(d) Zd*d+ ZeZd,d- Zd.d/ ZeZd0d1 Zd2d3 Zd4d5 Z e Z!d6d7 Z"d8d9 Z#d:d; Z$e$Z%d<d= Z&d>d? Z'dS )Ar   Nc                 C   sB   t  | _t| fdd}|| _g | _t  | _|d k	r>| | d S )Nc                 S   s2   | }|d k	r.|j r"|j|  n|j|  d S r   )r   _pending_removalsappenddatadiscard)itemselfrefr   r	   r	   r
   _remove&   s
    z!WeakSet.__init__.<locals>._remove)setr   r   r    r   r   update)r   r   r    r	   r	   r
   r   $   s    zWeakSet.__init__c                 C   s$   | j }| jj}|r ||  qd S r   )r   r   r   pop)r   lr   r	   r	   r
   r   4   s    zWeakSet._commit_removalsc              	   c   s8   t | & | jD ]}| }|d k	r|V  qW 5 Q R X d S r   )r   r   r   itemrefr   r	   r	   r
   __iter__:   s
    

zWeakSet.__iter__c                 C   s   t | jt | j S r   )lenr   r   r   r	   r	   r
   __len__C   s    zWeakSet.__len__c                 C   s.   zt |}W n tk
r"   Y dS X || jkS )NF)r   	TypeErrorr   )r   r   wrr	   r	   r
   __contains__F   s
    zWeakSet.__contains__c                 C   s   | j t| ft| dd fS )N__dict__)	__class__listgetattrr)   r	   r	   r
   
__reduce__M   s    
zWeakSet.__reduce__c                 C   s&   | j r|   | jt|| j d S r   )r   r   r   r   r   r    r   r   r	   r	   r
   r   Q   s    zWeakSet.addc                 C   s   | j r|   | j  d S r   )r   r   r   clearr)   r	   r	   r
   r4   V   s    zWeakSet.clearc                 C   s
   |  | S r   r/   r)   r	   r	   r
   copy[   s    zWeakSet.copyc                 C   sT   | j r|   z| j }W n tk
r:   tdd Y nX | }|d k	r|S qd S )Nzpop from empty WeakSet)r   r   r   r#   KeyErrorr%   r	   r	   r
   r#   ^   s    zWeakSet.popc                 C   s"   | j r|   | jt| d S r   )r   r   r   r   r   r3   r	   r	   r
   r   j   s    zWeakSet.removec                 C   s"   | j r|   | jt| d S r   )r   r   r   r   r   r3   r	   r	   r
   r   o   s    zWeakSet.discardc                 C   s&   | j r|   |D ]}| | qd S r   )r   r   r   )r   otherelementr	   r	   r
   r"   t   s    zWeakSet.updatec                 C   s   |  | | S r   )r"   r   r8   r	   r	   r
   __ior__z   s    
zWeakSet.__ior__c                 C   s   |   }|| |S r   )r6   difference_updater   r8   newsetr	   r	   r
   
difference~   s    
zWeakSet.differencec                 C   s   |  | d S r   )__isub__r:   r	   r	   r
   r<      s    zWeakSet.difference_updatec                 C   s<   | j r|   | |kr"| j  n| jdd |D  | S )Nc                 s   s   | ]}t |V  qd S r   r   .0r   r	   r	   r
   	<genexpr>   s     z#WeakSet.__isub__.<locals>.<genexpr>)r   r   r   r4   r<   r:   r	   r	   r
   r@      s    zWeakSet.__isub__c                    s      fdd|D S )Nc                 3   s   | ]}| kr|V  qd S r   r	   rA   r)   r	   r
   rC      s      z'WeakSet.intersection.<locals>.<genexpr>r5   r:   r	   r)   r
   intersection   s    zWeakSet.intersectionc                 C   s   |  | d S r   )__iand__r:   r	   r	   r
   intersection_update   s    zWeakSet.intersection_updatec                 C   s(   | j r|   | jdd |D  | S )Nc                 s   s   | ]}t |V  qd S r   r   rA   r	   r	   r
   rC      s     z#WeakSet.__iand__.<locals>.<genexpr>)r   r   r   rF   r:   r	   r	   r
   rE      s    zWeakSet.__iand__c                 C   s   | j dd |D S )Nc                 s   s   | ]}t |V  qd S r   r   rA   r	   r	   r
   rC      s     z#WeakSet.issubset.<locals>.<genexpr>)r   issubsetr:   r	   r	   r
   rG      s    zWeakSet.issubsetc                 C   s   | j ttt|k S r   r   r!   mapr   r:   r	   r	   r
   __lt__   s    zWeakSet.__lt__c                 C   s   | j dd |D S )Nc                 s   s   | ]}t |V  qd S r   r   rA   r	   r	   r
   rC      s     z%WeakSet.issuperset.<locals>.<genexpr>)r   
issupersetr:   r	   r	   r
   rK      s    zWeakSet.issupersetc                 C   s   | j ttt|kS r   rH   r:   r	   r	   r
   __gt__   s    zWeakSet.__gt__c                 C   s$   t || jstS | jttt|kS r   )
isinstancer/   NotImplementedr   r!   rI   r   r:   r	   r	   r
   __eq__   s    zWeakSet.__eq__c                 C   s   |   }|| |S r   )r6   symmetric_difference_updater=   r	   r	   r
   symmetric_difference   s    
zWeakSet.symmetric_differencec                 C   s   |  | d S r   )__ixor__r:   r	   r	   r
   rP      s    z#WeakSet.symmetric_difference_updatec                    s@    j r    |kr" j  n j fdd|D   S )Nc                 3   s   | ]}t | jV  qd S r   )r   r    rA   r)   r	   r
   rC      s     z#WeakSet.__ixor__.<locals>.<genexpr>)r   r   r   r4   rP   r:   r	   r)   r
   rR      s    zWeakSet.__ixor__c                 C   s   |  dd | |fD S )Nc                 s   s   | ]}|D ]
}|V  q
qd S r   r	   )rB   r   r   r	   r	   r
   rC      s       z WeakSet.union.<locals>.<genexpr>r5   r:   r	   r	   r
   union   s    zWeakSet.unionc                 C   s   t | |dkS )Nr   )r(   rD   r:   r	   r	   r
   
isdisjoint   s    zWeakSet.isdisjointc                 C   s
   t | jS r   )reprr   r)   r	   r	   r
   __repr__   s    zWeakSet.__repr__)N)(r   r   r   r   r   r'   r*   r-   r2   r   r4   r6   r#   r   r   r"   r;   r?   __sub__r<   r@   rD   __and__rF   rE   rG   __le__rJ   rK   __ge__rL   rO   rQ   __xor__rP   rR   rS   __or__rT   rV   r	   r	   r	   r
   r   #   sJ   
			N)_weakrefr   __all__r   r   r	   r	   r	   r
   <module>   s   