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S( s0 Utility functions used by the btm_matcher modulei ( t pytree( t grammart token( t pattern_symbolst python_symbolsiiit 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
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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
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TYPE_GROUPR t get_characteristic_subpatternt token_labelst NAMER ( R t nodet subp( ( s6 /opt/alt/python27/lib64/python2.7/lib2to3/btm_utils.pyt leaf_to_root! s8
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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.
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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*).
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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# ( ( s6 /opt/alt/python27/lib64/python2.7/lib2to3/btm_utils.pyt <lambda> t c s t | t o | k S( N( R6 R ( R# ( t common_chars( s6 /opt/alt/python27/lib64/python2.7/lib2to3/btm_utils.pyRO RP c s t | t o | k S( N( R6 R ( R# ( t common_names( s6 /opt/alt/python27/lib64/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
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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( ( s6 /opt/alt/python27/lib64/python2.7/lib2to3/btm_utils.pyRU s
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