B
    t\1                 @   sp   d dl mZ d dlmZ G dd deZG dd deeZG dd deZG d	d
 d
eZ	G dd deZ
dS )    )contextmanager)use_metaclassc               @   s   e Zd Zdd ZdS )_NormalizerMetac             C   s    t | |||}i |_i |_|S )N)type__new__rule_value_classesrule_type_classes)clsnamebasesdctZnew_cls r   /lib/python3.7/site-packages/parso/normalizer.pyr      s    z_NormalizerMeta.__new__N)__name__
__module____qualname__r   r   r   r   r   r      s   r   c               @   sz   e Zd Zdd Zdd Zdd Zdd Zed	d
 Zdd Z	dd Z
dd Zdd Zdd Zedd ZedddZdS )
Normalizerc             C   s.   || _ || _g | _| d| _| d| _d S )Nr   r   )grammarZ_configissues_instantiate_rules_rule_type_instances_rule_value_instances)selfr   Zconfigr   r   r   __init__   s
    zNormalizer.__init__c                sd   i }xZt   D ]J}t||i }x8| D ],\}} fdd|D }||g | q,W qW |S )Nc                s   g | ]}| qS r   r   ).0rule_cls)r   r   r   
<listcomp>   s    z1Normalizer._instantiate_rules.<locals>.<listcomp>)r   mrogetattritems
setdefaultextend)r   attrr   baseZ	rules_mapZtype_Zrule_classesnewr   )r   r   r      s    zNormalizer._instantiate_rulesc             C   s    |  | | |}|   |S )N)
initializevisitfinalize)r   nodevaluer   r   r   walk    s    

zNormalizer.walkc          	      sT   y
|j }W n tk
r$    |S X  | d fdd|D S Q R X d S )N c             3   s   | ]}  |V  qd S )N)r&   )r   Zchild)r   r   r   	<genexpr>-   s    z#Normalizer.visit.<locals>.<genexpr>)childrenAttributeError
visit_leaf
visit_nodejoin)r   r(   r-   r   )r   r   r&   &   s    
zNormalizer.visitc             c   s   |  | d V  d S )N)_check_type_rules)r   r(   r   r   r   r0   /   s    
zNormalizer.visit_nodec             C   s(   x"| j |jg D ]}|| qW d S )N)r   getr   	feed_node)r   r(   ruler   r   r   r2   4   s    zNormalizer._check_type_rulesc             C   s:   |  | x"| j|jg D ]}|| qW |j|j S )N)r2   r   r3   r)   r4   prefix)r   Zleafr5   r   r   r   r/   8   s    
zNormalizer.visit_leafc             C   s   d S )Nr   )r   r(   r   r   r   r%   @   s    zNormalizer.initializec             C   s   d S )Nr   )r   r   r   r   r'   C   s    zNormalizer.finalizec             C   s&   t |||}|| jkr"| j| dS )NT)Issuer   append)r   r(   codemessageZissuer   r   r   	add_issueF   s    
zNormalizer.add_issuec             K   s   | j f |S )z
        Use it as a class decorator::

            normalizer = Normalizer('grammar', 'config')
            @normalizer.register_rule(value='foo')
            class MyRule(Rule):
                error_code = 42
        )_register_rule)r	   kwargsr   r   r   register_ruleL   s    
zNormalizer.register_ruleNr   c                sX   t t |d k	r"| |d k	r4| sDsDtd fdd}|S )Nz%You must register at least something.c                sH   x D ]} j |g |  qW x D ]} j|g |  q(W | S )N)r   r    r8   r   )r   vt)r	   typesvaluesr   r   	decoratord   s
    

z,Normalizer._register_rule.<locals>.decorator)listr8   
ValueError)r	   r)   rB   r   rA   rC   r   )r	   rA   rB   r   r<   X   s    

zNormalizer._register_rule)Nr   Nr   )r   r   r   r   r   r*   r&   r   r0   r2   r/   r%   r'   r;   classmethodr>   r<   r   r   r   r   r      s   		r   c               @   s   e Zd ZeZdd ZdS )NormalizerConfigc             C   s   | j d krd S |  || S )N)normalizer_class)r   r   r   r   r   create_normalizerq   s    
z"NormalizerConfig.create_normalizerN)r   r   r   r   rH   rI   r   r   r   r   rG   n   s   rG   c               @   s4   e Zd Zdd Zdd Zdd Zdd Zd	d
 ZdS )r7   c             C   s   || _ || _|| _|j| _d S )N)Z_noder9   r:   	start_pos)r   r(   r9   r:   r   r   r   r   y   s
    zIssue.__init__c             C   s   | j |j ko| j|jkS )N)rJ   r9   )r   otherr   r   r   __eq__   s    zIssue.__eq__c             C   s   |  | S )N)rL   )r   rK   r   r   r   __ne__   s    zIssue.__ne__c             C   s   t | j| jfS )N)hashr9   rJ   )r   r   r   r   __hash__   s    zIssue.__hash__c             C   s   d| j j| jf S )Nz<%s: %s>)	__class__r   r9   )r   r   r   r   __repr__   s    zIssue.__repr__N)r   r   r   r   rL   rM   rO   rQ   r   r   r   r   r7   x   s
   r7   c               @   sF   e Zd ZdZdZdd Zdd Zdd Zdd	 Zdd
dZ	dd Z
dS )RuleNc             C   s
   || _ d S )N)_normalizer)r   Z
normalizerr   r   r   r      s    zRule.__init__c             C   s
   t  d S )N)NotImplementedError)r   r(   r   r   r   is_issue   s    zRule.is_issuec             C   s   |S )Nr   )r   r(   r   r   r   get_node   s    zRule.get_nodec             C   s"   |d kr| j }|d krtd|S )Nz$The message on the class is not set.)r:   rE   )r   r:   r   r   r   _get_message   s
    zRule._get_messagec             C   s<   |d kr| j }|d krtd| |}| j||| d S )Nz'The error code on the class is not set.)r9   rE   rW   rS   r;   )r   r(   r9   r:   r   r   r   r;      s    
zRule.add_issuec             C   s"   |  |r| |}| | d S )N)rU   rV   r;   )r   r(   Z
issue_noder   r   r   r4      s    

zRule.feed_node)NN)r   r   r   r9   r:   r   rU   rV   rW   r;   r4   r   r   r   r   rR      s   

rR   N)
contextlibr   Zparso._compatibilityr   r   r   r   objectrG   r7   rR   r   r   r   r   <module>   s   `
