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Edit: nodes.cpython-39.pyc
a �`wy � @ s� d Z ddlZddlmZ ddlmZ ddlmZ ddlmZ ddlm Z dd lm Z ej ej ej ejejejejd �Zejejejd �Zejejejejejej d d � dd � d�Z G dd� de �Z G dd� de �Z!G dd� de"�Z#dd� Z$G dd� de e!e"��Z%G dd� de%�Z&G d d � d e%�Z'G d d � d e%�Z(G d d!� d!e&�Z)G d"d#� d#e&�Z*G d$d%� d%e&�Z+G d&d'� d'e&�Z,G d(d)� d)e&�Z-G d*d+� d+e&�Z.G d,d-� d-e&�Z/G d.d/� d/e&�Z0G d0d1� d1e&�Z1G d2d3� d3e&�Z2G d4d5� d5e&�Z3G d6d7� d7e&�Z4G d8d9� d9e&�Z5G d:d;� d;e&�Z6G d<d=� d=e&�Z7G d>d?� d?e%�Z8G d@dA� dAe8�Z9G dBdC� dCe8�Z:G dDdE� dEe8�Z;G dFdG� dGe8�Z<G dHdI� dIe8�Z=G dJdK� dKe=�Z>G dLdM� dMe=�Z?G dNdO� dOe=�Z@G dPdQ� dQe=�ZAG dRdS� dSe=�ZBG dTdU� dUe'�ZCG dVdW� dWe'�ZDG dXdY� dYe8�ZEdZd[� ZFG d\d]� d]e8�ZGG d^d_� d_e8�ZHG d`da� dae8�ZIG dbdc� dce8�ZJG ddde� dee8�ZKG dfdg� dge8�ZLG dhdi� die8�ZMG djdk� dke8�ZNG dldm� dme'�ZOeO j dndo�PeQdpdq� eRe�eRe�B eRe �B D ��� 7 _ G drds� dse9�ZSG dtdu� due9�ZTG dvdw� dwe9�ZUG dxdy� dye9�ZVG dzd{� d{e9�ZWG d|d}� d}e9�ZXG d~d� de9�ZYG d�d�� d�e9�ZZG d�d�� d�e9�Z[G d�d�� d�e:�Z\G d�d�� d�e:�Z]G d�d�� d�e:�Z^G d�d�� d�e8�Z_G d�d�� d�e8�Z`G d�d�� d�e8�ZaG d�d�� d�e8�ZbG d�d�� d�e8�ZcG d�d�� d�e8�ZdG d�d�� d�e8�ZeG d�d�� d�e8�ZfG d�d�� d�e&�ZgG d�d�� d�e&�ZhG d�d�� d�e&�ZiG d�d�� d�e&�ZjG d�d�� d�e&�ZkG d�d�� d�ek�Zld�d�� Zmenem�e!_o[mdS )�z�AST nodes generated by the parser for the compiler. Also provides some node tree helper functions used by the parser and compiler in order to normalize nodes. � N)�deque)�Markup� )�izip)�PY2)� text_type)�with_metaclass)�*�/�//�**�%�+�-)�notr r c C s | |v S �N� ��a�br r �0/usr/lib/python3.9/site-packages/jinja2/nodes.py�<lambda># � r c C s | |vS r r r r r r r $ r )�eq�ne�gtZgteq�ltZlteq�inZnotinc @ s e Zd ZdZdS )� Impossiblez8Raised if the node could not perform a requested action.N��__name__� __module__� __qualname__�__doc__r r r r r ( s r c @ s e Zd ZdZdd� ZdS )�NodeTypez�A metaclass for nodes that handles the field and attribute inheritance. fields and attributes from the parent class are automatically forwarded to the child.c C s� dD ]l}g }|� t|d |d�� |� |�|d�� t|�dksHJ d��t|�tt|��ksdJ d��t|�||< q|�dd� t�| |||�S ) N)�fields� attributesr r r z multiple inheritance not allowedzlayout conflict�abstractF) �extend�getattr�get�len�set�tuple� setdefault�type�__new__)Zmcs�name�bases�d�attrZstorager r r r0 1 s zNodeType.__new__N)r r! r" r# r0 r r r r r$ , s r$ c @ s* e Zd ZdZd dd�Zdd� Zdd� ZdS ) � EvalContextzcHolds evaluation time information. Custom attributes can be attached to it in extensions. Nc C s0 || _ t|j�r |�|�| _n|j| _d| _d S �NF)� environment�callable� autoescape�volatile)�selfr7 Z template_namer r r �__init__B s zEvalContext.__init__c C s | j �� S r )�__dict__�copy�r; r r r �saveJ s zEvalContext.savec C s | j �� | j �|� d S r )r= �clear�update)r; �oldr r r �revertM s zEvalContext.revert)N)r r! r" r# r< r@ rD r r r r r5 = s r5 c C s( |d u r$| j d u rtd��t| j �S |S )NzIif no eval context is passed, the node must have an attached environment.)r7 � RuntimeErrorr5 )�node�ctxr r r �get_eval_contextR s � rH c @ s� e Zd ZdZdZdZdZdd� Zd dd �Zd d d �Z d d � Z dd� Z dd� Z d!dd�Z dd� Zdd� Zdd� ZejZdd � Zd d � ZdS )"�Nodea� Baseclass for all Jinja nodes. There are a number of nodes available of different types. There are four major types: - :class:`Stmt`: statements - :class:`Expr`: expressions - :class:`Helper`: helper nodes - :class:`Template`: the outermost wrapper node All nodes have fields and attributes. Fields may be other nodes, lists, or arbitrary values. Fields are passed to the constructor as regular positional arguments, attributes as keyword arguments. Each node has two attributes: `lineno` (the line number of the node) and `environment`. The `environment` attribute is set at the end of the parsing process for all nodes automatically. r ��linenor7 Tc O s� | j rtd��|r�t|�t| j�krh| js:td| jj ��td| jjt| j�t| j�dkr^dp`df ��t| j|�D ]\}}t| ||� qt| jD ]}t| ||� |d �� q�|r�tdt t |�� ��d S )Nz#abstract nodes are not instantiablez%r takes 0 argumentsz%r takes 0 or %d argument%sr �s� zunknown attribute %r) r' � TypeErrorr+ r% � __class__r r �setattrr& �pop�next�iter)r; r% r& r1 �argr4 r r r r< s s( ��� z Node.__init__Nc c sn | j D ]b}|| u r du s@n |dur0||vs@|dur||v rz|t| |�fV W q tyf Y q0 qdS )aZ This method iterates over all fields that are defined and yields ``(key, value)`` tuples. Per default all fields are returned, but it's possible to limit that to some fields by providing the `only` parameter or to exclude some using the `exclude` parameter. Both should be sets or tuples of field names. N)r% r) �AttributeError)r; �exclude�onlyr1 r r r � iter_fields� s" ������ zNode.iter_fieldsc c sP | � ||�D ]>\}}t|t�r:|D ]}t|t�r"|V q"q t|t�r |V q dS )z�Iterates over all direct child nodes of the node. This iterates over all fields and yields the values of they are nodes. If the value of a field is a list all the nodes in that list are returned. N)rX � isinstance�listrI )r; rV rW �_�item�nr r r �iter_child_nodes� s zNode.iter_child_nodesc C s | � |�D ] }| S dS )ziFind the first node of a given type. If no such node exists the return value is `None`. N)�find_all)r; � node_type�resultr r r �find� s z Node.findc c s8 | � � D ]*}t||�r |V |�|�D ] }|V q&qdS )z�Find all the nodes of a given type. If the type is a tuple, the check is performed for any of the tuple items. N)r^ rY r_ )r; r` �childra r r r r_ � s z Node.find_allc C s: t | g�}|r6|�� }d|jv r&||_|�|�� � q | S )a Reset the context of a node and all child nodes. Per default the parser will all generate nodes that have a 'load' context as it's the most common one. This method is used in the parser to set assignment targets and other nodes to a store context. rG )r �popleftr% rG r( r^ )r; rG �todorF r r r �set_ctx� s z Node.set_ctxFc C sH t | g�}|rD|�� }d|jv r4|jdu s.|r4||_|�|�� � q | S )z.Set the line numbers of the node and children.rK N)r rd r& rK r( r^ )r; rK �overridere rF r r r � set_lineno� s zNode.set_linenoc C s0 t | g�}|r,|�� }||_|�|�� � q | S )z"Set the environment for all nodes.)r rd r7 r( r^ )r; r7 re rF r r r �set_environment� s zNode.set_environmentc C s( t | �t |�u o&t| �� �t|�� �kS r )r/ r- rX �r; �otherr r r �__eq__� s �z Node.__eq__c C s | � |� S r )rl rj r r r �__ne__� s z Node.__ne__c s& d� j jd�� fdd�� jD ��f S )Nz%s(%s)�, c 3 s" | ]}d |t � |d�f V qdS )z%s=%rN)r) )�.0rT r? r r � <genexpr>� r z Node.__repr__.<locals>.<genexpr>)rO r �joinr% r? r r? r �__repr__� s �z Node.__repr__c s$ � �fdd�� g �� | � d� ��S )Nc s� t | t�s ��t| �� d S ��d| jj � | jsB��d� d S t| j�D ]p\}}|rb��d� t| |�}t |t �r���d� t|�D ] \}}|r���d� � |� q���d� qL� |� qL��d� d S )Nz nodes.%s(�)rn �[�]) rY rI �append�reprrO r r% � enumerater) rZ )rF �idxZfield�valuer\ ��_dump�bufr r r| � s( zNode.dump.<locals>._dumprM )rq r? r r{ r �dump� s z Node.dump)NN)NN)F)r r! r" r# r% r& r' r< rX r^ rb r_ rf rh ri rl rm �object�__hash__rr r~ r r r r rI ^ s" rI c @ s e Zd ZdZdZdS )�Stmtz Base node for all statements.TN�r r! r" r# r' r r r r r� s r� c @ s e Zd ZdZdZdS )�Helperz,Nodes that exist in a specific context only.TNr� r r r r r� s r� c @ s e Zd ZdZdZdS )�TemplatezjNode that represents a template. This must be the outermost node that is passed to the compiler. ��bodyN�r r! r" r# r% r r r r r� s r� c @ s e Zd ZdZdZdS )�Outputz�A node that holds multiple expressions which are then printed out. This is used both for the `print` statement and the regular template data. ��nodesNr� r r r r r� s r� c @ s e Zd ZdZdZdS )�Extendsz Represents an extends statement.)�templateNr� r r r r r� & s r� c @ s e Zd ZdZdZdS )�Forax The for loop. `target` is the target for the iteration (usually a :class:`Name` or :class:`Tuple`), `iter` the iterable. `body` is a list of nodes that are used as loop-body, and `else_` a list of nodes for the `else` block. If no else node exists it has to be an empty list. For filtered nodes an expression can be stored as `test`, otherwise `None`. )�targetrS r� �else_�test� recursiveNr� r r r r r� , s r� c @ s e Zd ZdZdZdS )�Ifz4If `test` is true, `body` is rendered, else `else_`.)r� r� Zelif_r� Nr� r r r r r� 8 s r� c @ s e Zd ZdZdZdS )�Macroz�A macro definition. `name` is the name of the macro, `args` a list of arguments and `defaults` a list of defaults if there are any. `body` is a list of nodes for the macro body. )r1 �args�defaultsr� Nr� r r r r r� > s r� c @ s e Zd ZdZdZdS )� CallBlockz�Like a macro without a name but a call instead. `call` is called with the unnamed macro as `caller` argument this node holds. )�callr� r� r� Nr� r r r r r� G s r� c @ s e Zd ZdZdZdS )� FilterBlockzNode for filter sections.)r� �filterNr� r r r r r� O s r� c @ s e Zd ZdZdZdS )�Withz�Specific node for with statements. In older versions of Jinja the with statement was implemented on the base of the `Scope` node instead. .. versionadded:: 2.9.3 )�targets�valuesr� Nr� r r r r r� U s r� c @ s e Zd ZdZdZdS )�Blockz A node that represents a block.)r1 r� ZscopedNr� r r r r r� _ s r� c @ s e Zd ZdZdZdS )�Includez'A node that represents the include tag.)r� � with_contextZignore_missingNr� r r r r r� e s r� c @ s e Zd ZdZdZdS )�Importz&A node that represents the import tag.)r� r� r� Nr� r r r r r� k s r� c @ s e Zd ZdZdZdS )� FromImporta A node that represents the from import tag. It's important to not pass unsafe names to the name attribute. The compiler translates the attribute lookups directly into getattr calls and does *not* use the subscript callback of the interface. As exported variables may not start with double underscores (which the parser asserts) this is not a problem for regular Jinja code, but if this node is used in an extension extra care must be taken. The list of names may contain tuples if aliases are wanted. )r� �namesr� Nr� r r r r r� q s r� c @ s e Zd ZdZdZdS )�ExprStmtzAA statement that evaluates an expression and discards the result.�rF Nr� r r r r r� � s r� c @ s e Zd ZdZdZdS )�Assignz"Assigns an expression to a target.)r� rF Nr� r r r r r� � s r� c @ s e Zd ZdZdZdS )� AssignBlockz Assigns a block to a target.)r� r� r� Nr� r r r r r� � s r� c @ s& e Zd ZdZdZddd�Zdd� ZdS ) �Exprz Baseclass for all expressions.TNc C s t � �dS )an Return the value of the expression as constant or raise :exc:`Impossible` if this was not possible. An :class:`EvalContext` can be provided, if none is given a default context is created which requires the nodes to have an attached environment. .. versionchanged:: 2.4 the `eval_ctx` parameter was added. N)r �r; �eval_ctxr r r �as_const� s z Expr.as_constc C s dS )z8Check if it's possible to assign something to this node.Fr r? r r r � can_assign� s zExpr.can_assign)N)r r! r" r# r' r� r� r r r r r� � s r� c @ s& e Zd ZdZdZdZdZddd�ZdS )�BinExprz%Baseclass for all binary expressions.)�left�rightNTc C sj t | |�}| jjr&| j| jjv r&t� �t| j }z || j�|�| j �|��W S t yd t� �Y n0 d S r ) rH r7 � sandboxed�operatorZintercepted_binopsr �_binop_to_funcr� r� r� � Exception�r; r� �fr r r r� � s � � zBinExpr.as_const)N�r r! r" r# r% r� r' r� r r r r r� � s r� c @ s& e Zd ZdZdZdZdZddd�ZdS )� UnaryExprz$Baseclass for all unary expressions.r� NTc C s` t | |�}| jjr&| j| jjv r&t� �t| j }z|| j�|��W S t yZ t� �Y n0 d S r ) rH r7 r� r� Zintercepted_unopsr � _uaop_to_funcrF r� r� r� r r r r� � s � � zUnaryExpr.as_const)Nr� r r r r r� � s r� c @ s e Zd ZdZdZdd� ZdS )�Namea Looks up a name or stores a value in a name. The `ctx` of the node can be one of the following values: - `store`: store a value in the name - `load`: load that name - `param`: like `store` but if the name was defined as function parameter. )r1 rG c C s | j dvS )N)�trueZfalseZnone�True�False�None�r1 r? r r r r� � s zName.can_assignN�r r! r" r# r% r� r r r r r� � s r� c @ s e Zd ZdZdZdd� ZdS )�NSRefz)Reference to a namespace value assignment)r1 r4 c C s dS )NTr r? r r r r� � s zNSRef.can_assignNr� r r r r r� � s r� c @ s e Zd ZdZdZdS )�LiteralzBaseclass for literals.TNr� r r r r r� � s r� c @ s, e Zd ZdZdZddd�Zed dd��ZdS ) �Consta All constant values. The parser will return this node for simple constants such as ``42`` or ``"foo"`` but it can be used to store more complex values such as lists too. Only constants with a safe representation (objects where ``eval(repr(x)) == x`` is true). )rz Nc C sH | j }trDt|�tu rD| jjd rDz|�d�}W n tyB Y n0 |S )Nzcompiler.ascii_str�ascii)rz r r/ r r7 Zpolicies�encode� UnicodeError)r; r� �rvr r r r� s � � � zConst.as_constc C s( ddl m} ||�st� �| |||d�S )z�Return a const object if the value is representable as constant value in the generated code, otherwise it will raise an `Impossible` exception. r )� has_safe_reprrJ )Zcompilerr� r )�clsrz rK r7 r� r r r �from_untrusted s zConst.from_untrusted)N)NN)r r! r" r# r% r� � classmethodr� r r r r r� � s r� c @ s e Zd ZdZdZddd�ZdS )� TemplateDatazA constant template string.)�dataNc C s, t | |�}|jrt� �|jr&t| j�S | jS r )rH r: r r9 r r� r� r r r r� s zTemplateData.as_const)N�r r! r" r# r% r� r r r r r� s r� c @ s& e Zd ZdZdZddd�Zdd� ZdS ) �Tuplez�For loop unpacking and some other things like multiple arguments for subscripts. Like for :class:`Name` `ctx` specifies if the tuple is used for loading the names or storing. )�itemsrG Nc s" t | � �� t� fdd�| jD ��S )Nc 3 s | ]}|� � �V qd S r �r� �ro �x�r� r r rp 2 r z!Tuple.as_const.<locals>.<genexpr>)rH r- r� r� r r� r r� 0 s zTuple.as_constc C s | j D ]}|�� s dS qdS )NFT)r� r� )r; r\ r r r r� 4 s zTuple.can_assign)N�r r! r" r# r% r� r� r r r r r� ( s r� c @ s e Zd ZdZdZddd�ZdS )�Listz&Any list literal such as ``[1, 2, 3]``�r� Nc s t | � �� � fdd�| jD �S )Nc s g | ]}|� � ��qS r r� r� r� r r � <listcomp>B r z!List.as_const.<locals>.<listcomp>)rH r� r� r r� r r� @ s z List.as_const)Nr� r r r r r� ; s r� c @ s e Zd ZdZdZddd�ZdS )�DictzeAny dict literal such as ``{1: 2, 3: 4}``. The items must be a list of :class:`Pair` nodes. r� Nc s" t | � �� t� fdd�| jD ��S )Nc 3 s | ]}|� � �V qd S r r� r� r� r r rp N r z Dict.as_const.<locals>.<genexpr>)rH �dictr� r� r r� r r� L s z Dict.as_const)Nr� r r r r r� E s r� c @ s e Zd ZdZdZddd�ZdS )�Pairz A key, value pair for dicts.��keyrz Nc C s" t | |�}| j�|�| j�|�fS r )rH r� r� rz r� r r r r� V s z Pair.as_const)Nr� r r r r r� Q s r� c @ s e Zd ZdZdZddd�ZdS )�Keywordz>A key, value pair for keyword arguments where key is a string.r� Nc C s t | |�}| j| j�|�fS r )rH r� rz r� r� r r r r� ` s zKeyword.as_const)Nr� r r r r r� [ s r� c @ s e Zd ZdZdZddd�ZdS )�CondExprzZA conditional expression (inline if expression). (``{{ foo if bar else baz }}``) )r� �expr1�expr2Nc C s> t | |�}| j�|�r"| j�|�S | jd u r2t� �| j�|�S r )rH r� r� r� r� r r� r r r r� l s zCondExpr.as_const)Nr� r r r r r� e s r� c s� � fdd�| j D �}t� fdd�| jD ��}| jd urfz|�| j�� �� W n tyd t� �Y n0 | jd ur�z|� | j�� �� W n ty� t� �Y n0 ||fS )Nc s g | ]}|� � ��qS r r� r� r� r r r� y r z!args_as_const.<locals>.<listcomp>c 3 s | ]}|� � �V qd S r r� r� r� r r rp z r z args_as_const.<locals>.<genexpr>) r� r� �kwargs�dyn_argsr( r� r� r � dyn_kwargsrB )rF r� r� r� r r� r � args_as_constx s r� c @ s e Zd ZdZdZddd�ZdS )�Filtera This node applies a filter on an expression. `name` is the name of the filter, the rest of the fields are the same as for :class:`Call`. If the `node` of a filter is `None` the contents of the last buffer are filtered. Buffers are created by macros and filter blocks. �rF r1 r� r� r� r� Nc C s� t | |�}|js| jd u r t� �| jj�| j�}|d u sHt|dd�du rNt� �|jj rht|dd�rht� �t | |�\}}|� d| j� |�� t|dd�du r�|� d|� n t|dd�du r�|� d| j� z||i |��W S t y� t� �Y n0 d S )NZ contextfilterFTZasyncfiltervariantr ZevalcontextfilterZenvironmentfilter)rH r: rF r r7 �filtersr* r1 r) �is_asyncr� �insertr� r� )r; r� Zfilter_r� r� r r r r� � s( � zFilter.as_const)Nr� r r r r r� � s r� c @ s e Zd ZdZdZddd�ZdS )�Testz�Applies a test on an expression. `name` is the name of the test, the rest of the fields are the same as for :class:`Call`. r� Nc C sx | j j�| j�}|d u r t� �t| |�}t| |�\}}|�d| j� |�� z||i |��W S t yr t� �Y n0 d S )Nr ) r7 Ztestsr* r1 r rH r� r� rF r� r� )r; r� r� r� r� r r r r� � s z Test.as_const)Nr� r r r r r� � s r� c @ s e Zd ZdZdZdS )�Calla/ Calls an expression. `args` is a list of arguments, `kwargs` a list of keyword arguments (list of :class:`Keyword` nodes), and `dyn_args` and `dyn_kwargs` has to be either `None` or a node that is used as node for dynamic positional (``*args``) or keyword (``**kwargs``) arguments. )rF r� r� r� r� Nr� r r r r r� � s r� c @ s& e Zd ZdZdZddd�Zdd� ZdS ) �Getitemz@Get an attribute or item from an expression and prefer the item.)rF rT rG Nc C sX t | |�}| jdkrt� �z | j�| j�|�| j�|��W S tyR t� �Y n0 d S �N�load) rH rG r r7 �getitemrF r� rT r� r� r r r r� � s � zGetitem.as_constc C s dS r6 r r? r r r r� � s zGetitem.can_assign)Nr� r r r r r� � s r� c @ s& e Zd ZdZdZddd�Zdd� ZdS ) �GetattrznGet an attribute or item from an expression that is a ascii-only bytestring and prefer the attribute. )rF r4 rG Nc C sR | j dkrt� �z$t| |�}| j�| j�|�| j�W S tyL t� �Y n0 d S r� ) rG r rH r7 r) rF r� r4 r� r� r r r r� � s zGetattr.as_constc C s dS r6 r r? r r r r� s zGetattr.can_assign)Nr� r r r r r� � s r� c @ s e Zd ZdZdZddd�ZdS )�Slicez_Represents a slice object. 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