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(public) Decrement the index and return the code unit from there (pre-decrement, like s[--i]), or return U_SENTINEL if there is none (index is at the start).

See also:
UCharIteratorPrevious ICU 2.1

Definition at line 445 of file uiter.h.

Referenced by u_strCompareIter(), uiter_current32(), and uiter_previous32().

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