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Support negative indexing #8

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Support negative indexing #8

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8 changes: 7 additions & 1 deletion ugrapheme/ugrapheme.pyx
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Original file line number Diff line number Diff line change
Expand Up @@ -631,7 +631,13 @@ cpdef unicode grapheme_slice(unicode ustr,

cdef size_t l = PyUnicode_GetLength(ustr) - upos
if startpos < 0:
startpos = 0
startpos += l
if startpos < 0:
startpos = 0
if endpos < 0:
endpos += l
if endpos < 0:
endpos = 0
if startpos >= l or endpos <= startpos:
return ''

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