o
    $x`                      @   s   d Z ddlmZ ddlZddlZddlmZ ddlmZ ddlm	Z	 ddl
mZ ddl
mZ dd	l
mZ dd
l
mZ ddl
mZ ddlmZmZmZ ddgZefZdddZdd ZdddZdddZej e_ dZeefZdd Zdd ZdS )z!Verify interface implementations
    )print_functionN)FunctionType)
MethodType)PYPY2)BrokenImplementation)BrokenMethodImplementation)DoesNotImplement)Invalid)MultipleInvalid)
fromMethodfromFunctionMethodverifyObjectverifyClassFc           	      C   s   |dkr| j }n| j}g }|s||s|t| | | jddD ]%\}}z
t| |||| W q! tyF } z|| W Y d}~q!d}~ww |rYt|dkrS|d t| ||dS )a  
    Verify that *candidate* might correctly provide *iface*.

    This involves:

    - Making sure the candidate claims that it provides the
      interface using ``iface.providedBy`` (unless *tentative* is `True`,
      in which case this step is skipped). This means that the candidate's class
      declares that it `implements <zope.interface.implementer>` the interface,
      or the candidate itself declares that it `provides <zope.interface.provider>`
      the interface

    - Making sure the candidate defines all the necessary methods

    - Making sure the methods have the correct signature (to the
      extent possible)

    - Making sure the candidate defines all the necessary attributes

    :return bool: Returns a true value if everything that could be
       checked passed.
    :raises zope.interface.Invalid: If any of the previous
       conditions does not hold.

    .. versionchanged:: 5.0
        If multiple methods or attributes are invalid, all such errors
        are collected and reported. Previously, only the first error was reported.
        As a special case, if only one such error is present, it is raised
        alone, like before.
    cT)allN   r   )	implementedBy
providedByappendr   namesAndDescriptions_verify_elementr	   lenr
   )	iface	candidate	tentativevtypetesterexcsnamedesce r"   7/usr/lib/python3/dist-packages/zope/interface/verify.py_verify*   s$    r$   c                 C   sJ  zt ||}W n ty    t|ts|dkrY d S t| ||w t|ts(d S t|s2t|r4d S t|trZt	j
d dkrRt|trR|dkrRt|| |dd}n4t|| |d}n,t|trmt|jtu rmt|| |}nt|trx|dkrxd S t|st|d|| |d S t| | }|rtrt|||rd S t|||| |d S )Nr   r      r   )r   imlevel)r   zimplementation is not a method)getattrAttributeError
isinstancer   r   inspectismethoddescriptor	isbuiltinr   sysversion_infotyper   MethodTypes__func__r   propertycallabler   	_incompatgetSignatureInfor   _pypy2_false_positive)r   r   r    r   r   attrmethmessr"   r"   r#   r   `   sD   

 
r   c                 C      t | ||ddS )zF
    Verify that the *candidate* might correctly provide *iface*.
    r   r   r$   r   r   r   r"   r"   r#   r      s   c                 C   r:   )Nor;   r<   r=   r"   r"   r#   r      s   z*implementation requires too many argumentsc                 C   s<   | t vrdS tt }|dkr|nt|}||v rdS dS )NFr   T)_KNOWN_PYPY2_FALSE_POSITIVESvars__builtins__valuesr/   )msgr   r   known_builtin_typescandidate_typer"   r"   r#   r6      s   r6   c                 C   sp   t |d t | d krtS t |d t | d k r |d s dS | d r*|d s*dS | d r4|d s6dS d S d S )Nrequired
positionalvarargsz-implementation doesn't allow enough argumentskwargsz0implementation doesn't support keyword argumentsz1implementation doesn't support variable arguments)r   _MSG_TOO_MANY)rF   implementedr"   r"   r#   r4      s   r4   )FN)F)__doc__
__future__r   r*   r-   typesr   r   zope.interface._compatr   zope.interface.exceptionsr   r   r   r	   r
   zope.interface.interfacer   r   r   __all__r0   r$   r   r   r   rJ   	frozensetr?   r6   r4   r"   r"   r"   r#   <module>   s8   
6
E
