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� Z d � Z e d k r e j e e � � � n d S( sZ Parser driver.
This provides a high-level interface to parse a file into a syntax tree.
s# Guido van Rossum <guido@python.org>t Drivert load_grammari����Ni ( t grammart parset tokent tokenizet pgenc B sV e Z d d d � Z e d � Z e d � Z e d � Z d e d � Z e d � Z RS( c C s: | | _ | d k r$ t j � } n | | _ | | _ d S( N( R t Nonet loggingt getLoggert loggert convert( t selfR R R
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s4 Parse a series of tokens and return the syntax tree.i i u s
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c C s" t j | j � } | j | | � S( s* Parse a stream and return the syntax tree.( R t generate_tokenst readlineR( ( R t streamR R ( ( s9 /opt/alt/python27/lib64/python2.7/lib2to3/pgen2/driver.pyt parse_stream_rawW s c C s | j | | � S( s* Parse a stream and return the syntax tree.( R, ( R R+ R ( ( s9 /opt/alt/python27/lib64/python2.7/lib2to3/pgen2/driver.pyt parse_stream\ s c C s; t j | d | � } z | j | | � SWd | j � Xd S( s( Parse a file and return the syntax tree.t rN( t codecst openR- t close( R t filenamet encodingR R+ ( ( s9 /opt/alt/python27/lib64/python2.7/lib2to3/pgen2/driver.pyt
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c C sN t j j | � s t St j j | � s, t St j j | � t j j | � k S( s0 Inquire whether file a was written since file b.( R< R= t existsR: t Truet getmtime( t at b( ( s9 /opt/alt/python27/lib64/python2.7/lib2to3/pgen2/driver.pyRH � s
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| � | S( s� 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.
( R< R= t isfileR RG t basenamet pkgutilt get_dataR RM t loads( t packaget grammar_sourcet pickled_namet dataRR ( ( s9 /opt/alt/python27/lib64/python2.7/lib2to3/pgen2/driver.pyt load_packaged_grammar� s
c G sc | s t j d } n t j d t j d t j d d � x$ | D] } t | d t d t �q? Wt S( s� Main program, when run as a script: produce grammar pickle files.
Calls load_grammar for each argument, a path to a grammar text file.
i t levelR+ t formats %(message)sRP RQ ( RB t argvR t basicConfigt INFOt stdoutR RU ( t argsRD ( ( s9 /opt/alt/python27/lib64/python2.7/lib2to3/pgen2/driver.pyt main� s
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__author__t __all__R/ R< R R[ R5 RB R R R R R R t objectR RG R RU R: R RH Rb Rj R8 t exitt int( ( ( s9 /opt/alt/python27/lib64/python2.7/lib2to3/pgen2/driver.pyt <module> s$ (P