Edit File: driver.cpython-37.pyc
B q}�c_ � @ s� d Z dZddgZddlZddlZddlZddlZddlZddlZddl m Z m Z m Z m Z mZ 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 krt�� }|| _|| _d S )N)r �logging� getLogger�logger�convert)�selfr r r � r �9/opt/alt/python37/lib64/python3.7/lib2to3/pgen2/driver.py�__init__ s zDriver.__init__Fc C s� t �| j| j�}|�� d}d}d } } } } } d} �xR|D �]4} | \}}}} } |||fkr�||f|ks|t||f|f��|\} }|| k r�| d| | 7 } | }d}||k r�| | ||� 7 } |}|tjtjfkr�| |7 } | \}}|� d�r@|d7 }d}q@|t j k�rtj | }|�r,| j �dt j| || � |�||| |f��rT|�rR| j �d� P d} | \}}|� d�r@|d7 }d}q@W 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 Zsetup�AssertionErrorr �COMMENT�NL�endswithr �OPZopmapr �debug�tok_nameZaddtokenZ ParseErrorZrootnode)r �tokensr �p�lineno�column�type�value�start�endZ line_text�prefixZ quintupleZs_linenoZs_columnr r r � parse_tokens' sT 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_rawW s zDriver.parse_stream_rawc C s | � ||�S )z*Parse a stream and return the syntax tree.)r( )r r' r r r r � parse_stream\ s zDriver.parse_streamc C s( t j|d|d��}| �||�S Q R X 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_stringe s zDriver.parse_string)NN)F)F)F)NF)F) �__name__� __module__� __qualname__r r$ r( r) r/ r2 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_namek s rB � Grammar.txtTFc C s� |dkrt �� }|dkr t| �n|}|s2t|| �s�|�d| � t�| �}|r�|�d|� y|�|� W q� tk r� } z|�d|� W dd}~X Y q�X 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 rB �_newer�infor Zgenerate_grammar�dump�OSErrorr �Grammar�load)r? Zgp�save�forcer �g�er r r r r 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)r7 r8 �exists�getmtime)�a�br r r rD � s rD 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. ) r7 r8 �isfiler rB �basename�pkgutil�get_datar rH �loads)�packageZgrammar_sourceZ pickled_name�datarL r r r �load_packaged_grammar� s rY c G sF | st jdd� } tjtjt jdd� x| D ]}t|ddd� q,W 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)rJ rK )r= �argvr Z basicConfig�INFO�stdoutr )�argsr? r r r �main� s r` �__main__)rC NTFN)�__doc__� __author__�__all__�codecsr, r7 r rT r= r r r r r r �objectr rB r rD rY r` r3 �exit�intr r r r �<module> s$ M