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a k�h� � @ s d Z ddlmZ ddlZddlmZmZ ddlmZ ddl m Z m Z ddl m Z mZ ddlmZ ejd krxdd l mZ n dd lmZ e r�dd l mZ e e je je je jf ZG d d � d e�ZG dd� de�Zdddd�dd�Z e ef�Z dddd�dd�Z d!dddd d �d d �Z dS )"zHClasses representing different types of constraints on inference values.� )� annotationsN)�ABC�abstractmethod)�Iterator)� TYPE_CHECKING�Union)�nodes�util)�InferenceResult)� � )�Self)�basesc @ sT e Zd ZdZdddd�dd�Zeedd ddd d �d d ���Zeddd�dd��ZdS )� Constraintz-Represents a single constraint on a variable.� nodes.NodeNG�bool�None)�node�negate�returnc C s || _ || _d S )N�r r )�selfr r � r ��/root/rpmbuild/BUILDROOT/imh-python39-modules-3.9.7-92.el8.x86_64/opt/imh-python/lib/python3.9/site-packages/astroid/constraint.py�__init__ s zConstraint.__init__F� _NameNodes� Self | None�r �exprr r c C s dS )z�Return a new constraint for node matched from expr, if expr matches the constraint pattern. If negate is True, negate the constraint. Nr )�clsr r r r r r �match$ s zConstraint.matchr ��inferredr c C s dS )�HReturn True if this constraint is satisfied by the given inferred value.Nr �r r" r r r � satisfied_by/ s zConstraint.satisfied_byN)F) �__name__� __module__� __qualname__�__doc__r � classmethodr r r% r r r r r s � r c @ sN e Zd ZU dZe�d�Zded< eddddd d �d d ��Z d dd�dd�Z dS )�NoneConstraintz4Represents an "is None" or "is not None" constraint.Nz nodes.Const� CONST_NONEFr r r r r c C sv t |tj�rrt|j�dkrr|j}|jd \}}|dv rrt||�rrt|| j�rr|dkrX|pd|dkod| }| ||d�S dS )z�Return a new constraint for node matched from expr, if expr matches the constraint pattern. Negate the constraint based on the value of negate. � r > �is not�isr/ r. r N)� isinstancer �Compare�len�ops�left�_matchesr, )r r r r r4 �op�rightr r r r 9 s � � zNoneConstraint.matchr r! c C s" t |tj�rdS | jt|| j�A S )r# T)r0 r ZUninferableBaser r5 r, r$ r r r r% M s zNoneConstraint.satisfied_by)F) r& r' r( r) r �Constr, �__annotations__r* r r% r r r r r+ 4 s �r+ r znodes.LocalsDictNodeNGz dict[nodes.If, set[Constraint]])r �framer c C s� | }i }|dur�||ur�|j }t|tj�r~|�|�\}}d}|dkrVtt| |j��}n |dkrrtt| |jdd��}|r~|||< |}q|S )aH Returns the constraints for the given expression. The returned dictionary maps the node where the constraint was generated to the corresponding constraint(s). Constraints are computed statically by analysing the code surrounding expr. Currently this only supports constraints generated from if conditions. N�body�orelseT)�invert)�parentr0 r �IfZ locate_child�set�_match_constraint�test)r r: Z current_nodeZconstraints_mappingr> �branch�_� constraintsr r r �get_constraintsW s rF znodes.NodeNG | bases.Proxyr r )�node1�node2r c C s~ t | tj�r$t |tj�r$| j|jkS t | tj�rVt |tj�rV| j|jkoTt| j|j�S t | tj�rzt |tj�rz| j |j kS dS )z$Returns True if the two nodes match.F) r0 r �Name�name� Attribute�attrnamer5 r r8 �value)rG rH r r r r5 y s r5 FzIterator[Constraint])r r r= r c c s& t D ] }|�| ||�}|r|V qdS )z3Yields all constraint patterns for node that match.N)�ALL_CONSTRAINT_CLASSESr )r r r= Zconstraint_cls� constraintr r r rA � s rA )F)!r) � __future__r �sys�abcr r �collections.abcr �typingr r Zastroidr r Zastroid.typingr � version_infor �typing_extensionsr Z AssignAttrrK Z AssignNamerI r r r+ rF � frozensetrN r5 rA r r r r �<module> s( # �
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