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jinja2.nodes
~~~~~~~~~~~~
This module implements additional nodes derived from the ast base node.
It also provides some node tree helper functions like `in_lineno` and
`get_nodes` used by the parser and translator in order to normalize
python and jinja nodes.
:copyright: (c) 2017 by the Jinja Team.
:license: BSD, see LICENSE for more details.
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dd� Zdd� Zdd� ZejZdd � Zd d � ZdS )#�Nodea� Baseclass for all Jinja2 nodes. There are a number of nodes available
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- :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.
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rl Y qX qW dS )aZ This method iterates over all fields that are defined and yields
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zNode.set_linenoc C s4 t | g�}x$|r.|j� }||_|j|j� � q W | S )z"Set the environment for all nodes.)r r\ r2 r" rW )r6 r2 r] r@ r r r �set_environment� s
zNode.set_environmentc C s( t | �t |�ko&t| j� �t|j� �kS )N)r* r( rQ )r6 �otherr r r �__eq__� s z Node.__eq__c C s | j |� S )N)rc )r6 rb r r r �__ne__� s z Node.__ne__c s& d� j jdj� fdd�� jD ��f S )Nz%s(%s)z, c 3 s" | ]}d |t � |d�f V qdS )z%s=%rN)r# )�.0rM )r6 r r � <genexpr>� s z Node.__repr__.<locals>.<genexpr>)rH r �joinr )r6 r )r6 r �__repr__� s z
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rC c @ s e Zd ZdZdZdS )�Stmtz Base node for all statements.TN)r r r r r! r r r r rv s rv c @ s e Zd ZdZdZdS )�Helperz,Nodes that exist in a specific context only.TN)r r r r r! r r r r rw s rw c @ s e Zd ZdZdZdS )�TemplatezjNode that represents a template. This must be the outermost node that
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.. versionadded:: 2.9.3
�targets�valuesry N)r� r� ry )r r r r r r r r r r� T s r� c @ s e Zd ZdZdZdS )�Blockz A node that represents a block.r- ry �scopedN)r- ry r� )r r r r r r r r r r� ] s r� c @ s e Zd ZdZdZdS )�Includez'A node that represents the include tag.r} � with_context�ignore_missingN)r} r� r� )r r r r r r r r r r� b s r� c @ s e Zd ZdZdZdS )�Importz&A node that represents the import tag.r} r r� N)r} r r� )r r r r r r r r r r� g s r� c @ s e Zd ZdZdZdS )�
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r� c @ s e Zd ZdZdZdS )�ExprStmtzAA statement that evaluates an expression and discards the result.r@ N)r@ )r r r r r r r r r r� z s r� c @ s e Zd ZdZdZdS )�Assignz"Assigns an expression to a target.r r@ N)r r@ )r r r r r r r r r r� s r� c @ s e Zd ZdZdZdS )� AssignBlockz Assigns a block to a target.r r� ry N)r r� ry )r r r r r r r r r r� � s r� c @ s& e Zd ZdZdZddd�Zdd� ZdS ) �Exprz Baseclass for all expressions.TNc C s
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.. versionchanged:: 2.4
the `eval_ctx` parameter was added.
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Zd dd�Zdd � ZdS ) �Getitemz@Get an attribute or item from an expression and prefer the item.r@ rM rA Nc C sX t | |�}| jdkrt� �y | jj| jj|�| jj|��S tk
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.. versionadded:: 2.5
r� Nc C s4 t | |�}|jrt� �| jj|�}|jr0t|�S |S )N)rB r5 r r� r� r4 r )r6 r� r� r r r r� � s
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Example usage::
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body=[...])
.. versionadded:: 2.10
�contextry N)r� ry )r r r r r r r r r r� � s r� c @ s e Zd ZdZdZdS )�EvalContextModifiera
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