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6579
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python3.8
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lib2to3
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patcomp.cpython-38.opt-1.pyc
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U e5d� � @ s� d Z dZddlZddlmZmZmZmZmZm Z ddl m Z ddl m Z G dd � d e �Zd d � ZG d d � d e�Zejejejdd�Zdd� Zdd� Zdd� ZdS )z�Pattern compiler. The grammar is taken from PatternGrammar.txt. The compiler compiles a pattern to a pytree.*Pattern instance. z#Guido van Rossum <guido@python.org>� N� )�driver�literals�token�tokenize�parse�grammar)�pytree)�pygramc @ s e Zd ZdS )�PatternSyntaxErrorN)�__name__� __module__� __qualname__� r r �'/usr/lib64/python3.8/lib2to3/patcomp.pyr s r c c sL t jt jt jh}t�t�| �j�}|D ] }|\}}}}}||kr&|V q&dS )z6Tokenizes a string suppressing significant whitespace.N) r �NEWLINE�INDENT�DEDENTr �generate_tokens�io�StringIO�readline) �input�skip�tokensZ quintuple�type�value�start�endZ line_textr r r �tokenize_wrapper s r c @ s: e Zd Zd dd�Zddd�Zdd� Zdd d �Zd d � ZdS )�PatternCompilerNc C sZ |dkrt j| _t j| _nt�|�| _t �| j�| _t j| _ t j | _ tj | jt d�| _dS )z^Initializer. Takes an optional alternative filename for the pattern grammar. N)Zconvert)r Zpattern_grammarr Zpattern_symbols�symsr Z load_grammarZSymbolsZpython_grammarZ pygrammarZpython_symbols�pysymsZDriver�pattern_convert)�selfZ grammar_filer r r �__init__( s zPatternCompiler.__init__Fc C sp t |�}z| jj||d�}W n2 tjk rN } ztt|��d�W 5 d}~X Y nX |rb| �|�|fS | �|�S dS )z=Compiles a pattern string to a nested pytree.*Pattern object.)�debugN)r r Z parse_tokensr Z ParseErrorr �str� compile_node)r$ r r& Z with_treer �root�er r r �compile_pattern7 s z PatternCompiler.compile_patternc sV |j � jjkr|jd }|j � jjkrz� fdd�|jddd� D �}t|�dkrX|d S tjdd� |D �ddd�}|�� S |j � jj krʇ fd d�|jD �}t|�dkr�|d S tj|gddd�}|�� S |j � jj kr�� � |jdd� �}t� |�}|�� S d}|j}t|�d k�r>|d j t jk�r>|d j}|dd� }d}t|�dk�rx|d j � jjk�rx|d }|dd � }� � ||�}|dk �r>|j} | d } | j t jk�r�d} tj} nX| j t jk�r�d} tj} n>| j t jk�r� �| d � } } t| �d k�r� �| d �} n | dk�s"| dk�r>|�� }tj|gg| | d�}|dk �rN||_|�� S ) zXCompiles a node, recursively. This is one big switch on the node type. r c s g | ]}� � |��qS r �r( ��.0Zch�r$ r r � <listcomp>O s z0PatternCompiler.compile_node.<locals>.<listcomp>N� r c S s g | ] }|g�qS r r )r. �ar r r r0 R s ��min�maxc s g | ]}� � |��qS r r, r- r/ r r r0 V s � ���� )r r! ZMatcher�childrenZ Alternatives�lenr �WildcardPattern�optimizeZ AlternativeZ NegatedUnit� compile_basicZNegatedPatternr �EQUALr ZRepeater�STARZHUGE�PLUS�LBRACE�get_int�name) r$ �nodeZalts�pZunits�patternrC �nodes�repeatr9 Zchildr4 r5 r r/ r r( C s^ " z PatternCompiler.compile_nodec C s@ |d }|j tjkr4tt�|j��}t�t |�|�S |j tj kr�|j}|� � r�|t krbt d| ��|dd � rvt d��t�t | �S |dkr�d }n,|�d�s�t| j|d �}|d kr�t d| ��|dd � r�| �|d jd �g}nd }t�||�S nH|jdk�r| �|d �S |jd k�r<| �|d �}tj|ggddd �S d S ) Nr zInvalid token: %rr z Can't have details for token�any�_zInvalid symbol: %r�(�[r3 )r r �STRINGr' r Z evalStringr r Z LeafPattern�_type_of_literal�NAME�isupper� TOKEN_MAPr � startswith�getattrr" r( r9 Z NodePatternr; )r$ rG rH rD r r Zcontent� subpatternr r r r= � s8 z PatternCompiler.compile_basicc C s t |j�S �N)�intr )r$ rD r r r rB � s zPatternCompiler.get_int)N)FF)N)r r r r% r+ r( r= rB r r r r r & s G #r )rO rM �NUMBERZTOKENc C s. | d � � rtjS | tjkr&tj| S d S d S )Nr )�isalphar rO r Zopmap)r r r r rN � s rN c C s> |\}}}}|s|| j kr*tj|||d�S tj|||d�S dS )z9Converts raw node information to a Node or Leaf instance.)�contextN)Z number2symbolr ZNodeZLeaf)r Z raw_node_infor r rY r9 r r r r# � s r# c C s t � �| �S rU )r r+ )rF r r r r+ � s r+ )�__doc__� __author__r Zpgen2r r r r r r � r r � Exceptionr r �objectr rO rM rW rQ rN r# r+ r r r r �<module> s" �