Current File : //snap/core/17212/usr/lib/python3/dist-packages/jinja2/__pycache__/lexer.cpython-35.pyc
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jinja2.lexer
~~~~~~~~~~~~
This module implements a Jinja / Python combination lexer. The
`Lexer` class provided by this module is used to do some preprocessing
for Jinja.
On the one hand it filters out invalid operators like the bitshift
operators we don't allow in templates. On the other hand it separates
template code and python code in expressions.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD, see LICENSE for more details.
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| | � S) Nzbegin of commentzend of commentr% zbegin of statement blockzend of statement blockzbegin of print statementzend of print statementzbegin of line statementzend of line statementztemplate data / textzend of template)�reverse_operators�TOKEN_COMMENT_BEGIN�TOKEN_COMMENT_END�
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compile_rules� s ru c @ s1 e Z d Z d Z e d d � Z d d � Z d S)�FailurezjClass that raises a `TemplateSyntaxError` if called.
Used by the `Lexer` to specify known errors.
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r� c @ s: e Z d Z d Z d d � Z d d � Z d d � Z d S) �TokenStreamIteratorz`The iterator for tokenstreams. Iterate over the stream
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z TokenStreamIterator.__next__N)r r� r� r� r{ r� r� r@ r@ r@ rD r� s r� c @ s� e Z d Z d Z d d � Z d d � Z d d � Z e Z e d d � d
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d d � Z d d � Z d d � Z d d � Z d S) � TokenStreamz�A token stream is an iterable that yields :class:`Token`\s. The
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one token ahead. The current active token is stored as :attr:`current`.
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t | � S)N)r� )ry r@ r@ rD r� 1 s zTokenStream.__iter__c C s t | j � p | j j t k S)N)�boolr� r� r] rY )ry r@ r@ rD �__bool__4 s zTokenStream.__bool__c C s | S)Nr@ )rH r@ r@ rD rL 8 s zTokenStream.<lambda>�docz Are we at the end of the stream?c C s | j j | � d S)z Push a token back to the stream.N)r� ro )ry r_ r@ r@ rD �push: s zTokenStream.pushc C s/ t | � } | j } | j | � | | _ | S)zLook at the next token.)r� r� r� )ry Z old_token�resultr@ r@ rD �look> s
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Wd S)zGot n tokens ahead.N)r� r� )ry �nrH r@ r@ rD �skipF s zTokenStream.skipc C s | j j | � r t | � Sd S)zqPerform the token test and return the token if it matched.
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N)r� r� r� )ry rc r@ r@ rD �next_ifK s zTokenStream.next_ifc C s | j | � d k S)z8Like :meth:`next_if` but only returns `True` or `False`.N)r� )ry rc r@ r@ rD �skip_ifR s zTokenStream.skip_ifc C sr | j } | j r' | j j � | _ nG | j j t k rn y t | j � | _ Wn t k
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zTokenStream.__next__c C s1 t | j j t d � | _ d | _ d | _ d S)zClose the stream.r� NT)r� r� r| rY r� r� )ry r@ r@ rD r� b s zTokenStream.closec C s� | j j | � s� t | � } | j j t k rU t d | | j j | j | j � � t d | t | j � f | j j | j | j � � z | j SWd t
| � Xd S)z}Expect a given token type and return it. This accepts the same
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Class that implements a lexer for a given environment. Automatically
created by the environment class, usually you don't have to do that.
Note that the lexer is not automatically bound to an environment.
Multiple environments can share the same lexer.
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