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driver.cpython-39.pyc
a �DOgQ � @ s� d Z dZddgZddlZddlZddlZddlZddlZddlm Z m Z m Z m Z m Z G dd� de�Zd d � Zddd�Zdd� Zdd� Zdd� Zedkr�e�ee� �� dS )zZParser driver. This provides a high-level interface to parse a file into a syntax tree. z#Guido van Rossum <guido@python.org>�Driver� load_grammar� N� )�grammar�parse�token�tokenize�pgenc @ sH e Zd Zddd�Zddd�Zddd�Zdd d �Zdd d �Zdd d�ZdS )r Nc C s& || _ |d u rt�� }|| _|| _d S )N)r �logging� getLogger�logger�convert)�selfr r r � r �,/usr/lib64/python3.9/lib2to3/pgen2/driver.py�__init__ s zDriver.__init__Fc C s� t �| j| j�}|�� d}d}d } } } } } d} |D �]8} | \}}}} } |||fkr�||f|ksxJ ||f|f��|\} }|| k r�| d| | 7 } | }d}||k r�| | ||� 7 } |}|tjtjfv r�| |7 } | \}}|�d�r<|d7 }d}q<|t j k�r tj | }|�r(| j � dt j| || � |�||| |f��rT|�rN| j � d� �q�d} | \}}|�d�r<|d7 }d}q<t �d||| |f��|jS ) z4Parse a series of tokens and return the syntax tree.r r N� � z%s %r (prefix=%r)zStop.zincomplete input)r ZParserr r Zsetupr �COMMENT�NL�endswithr �OPZopmapr �debug�tok_nameZaddtokenZ ParseError�rootnode)r �tokensr �p�lineno�column�type�value�start�endZ line_text�prefixZ quintupleZs_linenoZs_columnr r r � parse_tokens& sX � �zDriver.parse_tokensc C s t �|j�}| �||�S �z*Parse a stream and return the syntax tree.)r �generate_tokens�readliner$ )r �streamr r r r r �parse_stream_rawV s zDriver.parse_stream_rawc C s | � ||�S r% )r) )r r( r r r r � parse_stream[ s zDriver.parse_streamc C s@ t j|d|d�� }| �||�W d � S 1 s20 Y dS )z(Parse a file and return the syntax tree.�r)�encodingN)�io�openr* )r �filenamer, r r( r r r � parse_file_ s zDriver.parse_filec C s t �t�|�j�}| �||�S )z*Parse a string and return the syntax tree.)r r& r- �StringIOr' r$ )r �textr r r r r � parse_stringd s zDriver.parse_string)NN)F)F)F)NF)F) �__name__� __module__� __qualname__r r$ r) r* r0 r3 r r r r r s 0 c C s: t j�| �\}}|dkr d}|| d�tttj�� d S )Nz.txtr �.z.pickle)�os�path�splitext�join�map�str�sys� version_info)�gt�head�tailr r r �_generate_pickle_namej s rC � Grammar.txtTFc C s� |du rt �� }|du r t| �n|}|s2t|| �s�|�d| � t�| �}|r�|�d|� z|�|� W q� ty� } z|�d|� W Y d}~q�d}~0 0 nt � � }|� |� |S )z'Load the grammar (maybe from a pickle).Nz!Generating grammar tables from %sz Writing grammar tables to %szWriting failed: %s) r r rC �_newer�infor Zgenerate_grammar�dump�OSErrorr �Grammar�load)r@ Zgp�save�forcer �g�er r r r q s $ c C s8 t j�| �sdS t j�|�s dS t j�| �t j�|�kS )z0Inquire whether file a was written since file b.FT)r8 r9 �exists�getmtime)�a�br r r rE � s rE c C sF t j�|�rt|�S tt j�|��}t�| |�}t� � }|� |� |S )a� Normally, loads a pickled grammar by doing pkgutil.get_data(package, pickled_grammar) where *pickled_grammar* is computed from *grammar_source* by adding the Python version and using a ``.pickle`` extension. However, if *grammar_source* is an extant file, load_grammar(grammar_source) is called instead. This facilitates using a packaged grammar file when needed but preserves load_grammar's automatic regeneration behavior when possible. ) r8 r9 �isfiler rC �basename�pkgutil�get_datar rI �loads)�packageZgrammar_sourceZ pickled_name�datarM r r r �load_packaged_grammar� s rZ c G sB | st jdd� } tjtjt jdd� | D ]}t|ddd� q*dS )z�Main program, when run as a script: produce grammar pickle files. Calls load_grammar for each argument, a path to a grammar text file. r Nz %(message)s)�levelr( �formatT)rK rL )r> �argvr � basicConfig�INFO�stdoutr )�argsr@ r r r �main� s �rb �__main__)rD NTFN)�__doc__� __author__�__all__r- r8 r rU r> r r r r r r �objectr rC r rE rZ rb r4 �exit�intr r r r �<module> s$ M �
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