B
    ģZv  ć               @   sD   d Z ddlmZmZmZ dd ZG dd deZG dd deZd	S )
a  Finding bad name and attribute accesses

`find_errors` function can be used to find possible bad name and
attribute accesses.  As an example::

  errors = find_errors(project, project.get_resource('mod.py'))
  for error in errors:
      print('%s: %s' % (error.lineno, error.error))

prints possible errors for ``mod.py`` file.

TODO:

* use task handles
* reporting names at most once
* attributes of extension modules that don't appear in
  extension_modules project config can be ignored
* not calling `PyScope.get_inner_scope_for_line()` if it is a
  bottleneck; needs profiling
* not reporting occurrences where rope cannot infer the object
* rope saves multiple objects for some of the names in its objectdb
  use all of them not to give false positives
* ... ;-)

é    )ŚastŚevaluateŚ	pyobjectsc             C   s(   |   |”}t|}t | ” |” |jS )zWFind possible bad name and attribute accesses

    It returns a list of `Error`\s.
    )Zget_pymoduleŚ_BadAccessFinderr   ŚwalkZget_astŚerrors)ZprojectŚresourceŚpymoduleŚfinder© r   ś6lib/python3.7/site-packages/rope/contrib/finderrors.pyŚfind_errors   s    
r   c               @   s4   e Zd Zdd Zdd Zdd Zdd Zd	d
 ZdS )r   c             C   s   || _ | ” | _g | _d S )N)r	   Z	get_scopeŚscoper   )Śselfr	   r   r   r   Ś__init__*   s    
z_BadAccessFinder.__init__c             C   sh   t |jtjtjfrd S | j |j”}| |j	”}|d krH|  
|d” n|  |||j”rd|  
|d” d S )NzUnresolved variablezDefined later)Ś
isinstanceŚctxr   ŚStoreZParamr   Śget_inner_scope_for_lineŚlinenoŚlookupŚidŚ
_add_errorŚ_is_defined_after)r   Śnoder   Śpynamer   r   r   Ś_Name/   s    z_BadAccessFinder._Namec             C   sn   t |jtjs\| j |j”}t ||j	”}|d k	r\| 
” t ” kr\|j| 
” kr\|  |d” t |j	| ” d S )NzUnresolved attribute)r   r   r   r   r   r   r   r   Z	eval_nodeŚvalueZ
get_objectr   Zget_unknownŚattrr   r   )r   r   r   r   r   r   r   Ś
_Attribute9   s    z_BadAccessFinder._Attributec             C   sF   t |tjr|j}n|j}|dkrBt|j|d | }| j |” d S )NŚNoneś )	r   r   Z	Attributer   r   ŚErrorr   r   Śappend)r   r   ŚmsgŚnameŚerrorr   r   r   r   C   s    z_BadAccessFinder._add_errorc             C   sR   |  ” }|d k	rN|d d k	rN|d | jkrN||d   krF| ” krNn ndS d S )Né   r   T)Zget_definition_locationr	   Zget_end)r   r   r   r   Ślocationr   r   r   r   L   s
     z"_BadAccessFinder._is_defined_afterN)Ś__name__Ś
__module__Ś__qualname__r   r   r   r   r   r   r   r   r   r   (   s
   

	r   c               @   s   e Zd Zdd Zdd ZdS )r"   c             C   s   || _ || _d S )N)r   r&   )r   r   r&   r   r   r   r   V   s    zError.__init__c             C   s   d| j | jf S )Nz%s: %s)r   r&   )r   r   r   r   Ś__str__Z   s    zError.__str__N)r)   r*   r+   r   r,   r   r   r   r   r"   T   s   r"   N)	Ś__doc__Z	rope.baser   r   r   r   Śobjectr   r"   r   r   r   r   Ś<module>   s   ,