27 Iterators library [iterators]

27.5 Iterator adaptors [predef.iterators]

27.5.3 Move iterators [move.iterators]

27.5.3.3 move_­iterator operations [move.iter.ops]

27.5.3.3.11 move_­iterator​::​operator-= [move.iter.op.-=]

constexpr move_iterator& operator-=(difference_type n);
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Effects: As if by: current -= n;
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Returns: *this.