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support the 'groupindex' attribute on compiled patterns #35

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support the 'groupindex' attribute on compiled patterns #35

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13 changes: 13 additions & 0 deletions src/re2.pyx
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Original file line number Diff line number Diff line change
Expand Up @@ -380,13 +380,18 @@ cdef class Pattern:
cdef int ngroups
cdef bint encoded
cdef int _flags
cdef dict _groupindex
cdef public object pattern
cdef object __weakref__

property flags:
def __get__(self):
return self._flags

property groupindex:
def __get__(self):
return self._groupindex

property groups:
def __get__(self):
return self.ngroups
Expand Down Expand Up @@ -979,12 +984,20 @@ def _compile(pattern, int flags=0, int max_mem=8388608):
warnings.warn("WARNING: Using re module. Reason: %s" % error_msg)
return re.compile(original_pattern, flags)

cdef _re2.const_stringintmap * named_groups = _re2.addressof(re_pattern.NamedCapturingGroups())
cdef dict groupindex = {}
it = named_groups.begin()
while it != named_groups.end():
groupindex[cpp_to_pystring(deref(it).first)] = deref(it).second
inc(it)

cdef Pattern pypattern = Pattern()
pypattern.pattern = original_pattern
pypattern.re_pattern = re_pattern
pypattern.ngroups = re_pattern.NumberOfCapturingGroups()
pypattern.encoded = <bint>encoded
pypattern._flags = flags
pypattern._groupindex = groupindex
del s
return pypattern

Expand Down