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This provides a high-level interface to parse a file into a syntax tree.
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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( ( s, /usr/lib64/python2.7/lib2to3/pgen2/driver.pyRD � 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.
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