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driver.cpython-310.pyc
o bc! @ s d Z dZddgZddlZddlZddlZddlZddlZddlm Z m Z m Z m Z m Z G dd deZd d Z dddZdd Zdd Zdd ZedkrXeee dS 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 )grammarparsetokentokenizepgenc @ sH e Zd ZdddZdddZdddZdd d Zdd d Zdd dZdS )r Nc C s& || _ |d u r t }|| _|| _d S )N)r logging getLoggerloggerconvert)selfr r r r +/usr/lib/python3.10/lib2to3/pgen2/driver.py__init__ s zDriver.__init__Fc C s t | j| j}| d}d}d } } } } } d} |D ]} | \}}}} } |||fkr]||f|ks;J ||f|f|\} }|| k rO| d| | 7 } | }d}||k r]| | || 7 } |}|tjtjfv ry| |7 } | \}}|drx|d7 }d}q |t j krtj | }|r| j dt j| || |||| |fr|r| j d |jS d} | \}}|dr|d7 }d}q t d||| |f) z4Parse a series of tokens and return the syntax tree.r r N z%s %r (prefix=%r)zStop.zincomplete input)r Parserr r setupr COMMENTNLendswithr OPopmapr debugtok_nameaddtoken ParseErrorrootnode)r tokensr plinenocolumntypevaluestartend line_textprefix quintuples_linenos_columnr r r parse_tokens& sZ zDriver.parse_tokensc C s t |j}| ||S z*Parse a stream and return the syntax tree.)r generate_tokensreadliner- )r streamr r r r r parse_stream_rawV s zDriver.parse_stream_rawc C s | ||S r. )r2 )r r1 r r r r parse_stream[ s zDriver.parse_streamc C s@ t j|d|d}| ||W d S 1 sw Y dS )z(Parse a file and return the syntax tree.r)encodingN)ioopenr3 )r filenamer5 r r1 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/ r6 StringIOr0 r- )r textr r r r r parse_stringd s zDriver.parse_string)NN)F)NF) __name__ __module__ __qualname__r r- r2 r3 r9 r< r r r r r s 0 c C s: t j| \}}|dkrd}|| dtttj d S )Nz.txtr .z.pickle)ospathsplitextjoinmapstrsys version_info)gtheadtailr r r _generate_pickle_namej s rL Grammar.txtTFc C sd |du rt }|du rt| n|}|st|| s'|d| t| } |S t }| | |S )z'Load the grammar (maybe from a pickle).Nz!Generating grammar tables from %s) r r rL _newerinfor generate_grammardumpOSErrorr Grammarload)rI gpsaveforcer ger r r r q s c C s8 t j| sdS t j|sdS t j| t j|kS )z0Inquire whether file a was written since file b.FT)rA rB existsgetmtime)abr r r rN s rN c C sF t j|r t|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. ) rA rB isfiler rL basenamepkgutilget_datar rS loads)packagegrammar_source pickled_namedatarX r r r load_packaged_grammar s rg c G sB | s t jdd } tjtjt jdd | D ] }t|ddd qdS )zMain 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)levelr1 formatT)rV rW )rG argvr basicConfigINFOstdoutr )argsrI r r r main s ro __main__)rM NTFN)__doc__ __author____all__r6 rA r r` rG r r r r r r objectr rL r rN rg ro r= exitintr r r r <module> s( M