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btm_utils.pyc
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� xFWgc @ s� d Z d d l m Z d d l m Z m Z d d l m Z m Z e Z e Z e j Z e Z d Z d Z d Z d e f d � � YZ d d � Z d � Z d � Z d S( s0 Utility functions used by the btm_matcher modulei ( t pytree( t grammart token( t pattern_symbolst python_symbolsi����i����i����t MinNodec B sA e Z d Z d d d � Z d � Z d � Z d � Z d � Z RS( s� This class serves as an intermediate representation of the pattern tree during the conversion to sets of leaf-to-root subpatternsc C sC | | _ | | _ g | _ t | _ d | _ g | _ g | _ d S( N( t typet namet childrent Falset leaft Nonet parentt alternativest group( t selfR R ( ( s' /usr/lib/python2.7/lib2to3/btm_utils.pyt __init__ s c C s t | j � d t | j � S( Nt ( t strR R ( R ( ( s' /usr/lib/python2.7/lib2to3/btm_utils.pyt __repr__ s c C sU | } g } xB| rP| j t k r� | j j | � t | j � t | j � k r| t | j � g } g | _ | j } q q� | j } d } Pn | j t k r| j j | � t | j � t | j � k r� t | j � } g | _ | j } q q| j } d } Pn | j t j k r4| j r4| j | j � n | j | j � | j } q W| S( s� Internal method. Returns a characteristic path of the pattern tree. This method must be run for all leaves until the linear subpatterns are merged into a singleN( R t TYPE_ALTERNATIVESR t appendt lenR t tupleR R t TYPE_GROUPR t get_characteristic_subpatternt token_labelst NAMER ( R t nodet subp( ( s' /usr/lib/python2.7/lib2to3/btm_utils.pyt leaf_to_root! s8 c C s1 x* | j � D] } | j � } | r | Sq Wd S( s� Drives the leaf_to_root method. The reason that leaf_to_root must be run multiple times is because we need to reject 'group' matches; for example the alternative form (a | b c) creates a group [b c] that needs to be matched. Since matching multiple linear patterns overcomes the automaton's capabilities, leaf_to_root merges each group into a single choice based on 'characteristic'ity, i.e. (a|b c) -> (a|b) if b more characteristic than c Returns: The most 'characteristic'(as defined by get_characteristic_subpattern) path for the compiled pattern tree. N( t leavesR ( R t lR ( ( s' /usr/lib/python2.7/lib2to3/btm_utils.pyt get_linear_subpatternK s c c sE x- | j D]" } x | j � D] } | Vq Wq W| j sA | Vn d S( s- Generator that returns the leaves of the treeN( R R ( R t childt x( ( s' /usr/lib/python2.7/lib2to3/btm_utils.pyR ` s N( t __name__t __module__t __doc__R R R R R! R ( ( ( s' /usr/lib/python2.7/lib2to3/btm_utils.pyR s * c C s d } | j t j k r( | j d } n | j t j k r� t | j � d k rh t | j d | � } q�t d t � } x�| j D]P } | j j | � d r� q� n t | | � } | d k r� | j j | � q� q� Wn$| j t j k rxt | j � d k r_t d t � } x9 | j D]. } t | | � } | r| j j | � qqW| j sud } quq�t | j d | � } n�| j t j k r�t | j d t j � r�| j d j d k r�t | j d | � St | j d t j � r�| j d j d k s=t | j � d k rAt | j d d � rA| j d j d k rAd St } d } d } t } d } t } x� | j D]� } | j t j k r�t } | } n< | j t j k r�t } | } n | j t j k r�| } n t | d � ro| j d k rot } qoqoW| rA| j d } t | d � rN| j d k rN| j d } qNn | j d } | j t j k r�| j d k r�t d t � } qTt t | j � r�t d t t | j � � } qTt d t t | j � � } n� | j t j k r0| j j d � } | t k rt d t | � } qTt d t j d | � } n$ | j t j k rTt | | � } n | r�| j d j d k ryd } q�| j d j d k r�q�t � n | r�| d k r�xI | j d d !D]4 } t | | � } | d k r�| j j | � q�q�Wq�n | r| | _! n | S( s� Internal function. Reduces a compiled pattern tree to an intermediate representation suitable for feeding the automaton. This also trims off any optional pattern elements(like [a], a*). i i R i t (t [t valuet =i t anyt 'R t *t +i����N(" R R t symst MatcherR t AlternativesR t reduce_treeR R t indexR t AlternativeR t Unitt isinstanceR t LeafR) t hasattrt TrueR t Detailst RepeaterR R t TYPE_ANYt getattrt pysymst STRINGt stript tokenst NotImplementedErrorR ( R R t new_nodeR" t reducedR t details_nodet alternatives_nodet has_repeatert repeater_nodet has_variable_namet name_leafR ( ( s' /usr/lib/python2.7/lib2to3/btm_utils.pyR2 h s� c s, t | t � s | St | � d k r- | d Sg } g } d d d d d g � g } d � x� | D]� } t t | d � � � ra t t | � f d � � � r� | j | � q� t t | � f d � � � r� | j | � q� | j | � qa qa W| r� | } n | r | } n | r | } n t | d t �S( s� Picks the most characteristic from a list of linear patterns Current order used is: names > common_names > common_chars i i t int fort ift notR s []().,:c S s t | � t k S( N( R R ( R# ( ( s' /usr/lib/python2.7/lib2to3/btm_utils.pyt <lambda>� t c s t | t � o | � k S( N( R6 R ( R# ( t common_chars( s' /usr/lib/python2.7/lib2to3/btm_utils.pyRO RP c s t | t � o | � k S( N( R6 R ( R# ( t common_names( s' /usr/lib/python2.7/lib2to3/btm_utils.pyRO RP t key( R6 t listR R+ t rec_testR t max( t subpatternst subpatterns_with_namest subpatterns_with_common_namest subpatterns_with_common_charst subpattern( ( RQ RR s' /usr/lib/python2.7/lib2to3/btm_utils.pyR � s2 c c sW xP | D]H } t | t t f � rD x* t | | � D] } | Vq2 Wq | | � Vq Wd S( sP Tests test_func on all items of sequence and items of included sub-iterablesN( R6 RT R RU ( t sequencet test_funcR# t y( ( s' /usr/lib/python2.7/lib2to3/btm_utils.pyRU s N( R& RP R t pgen2R R t pygramR R R/ R> t opmapRA R R< R R t objectR R R2 R RU ( ( ( s' /usr/lib/python2.7/lib2to3/btm_utils.pyt <module> s X � %