C++ STL advance 和next 区别
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std::advance
- modifies its argument
- returns nothing
- works on input iterators or better (or bi-directional iterators if a negative distance is given)
std::next
- leaves its argument unmodified
- returns a copy of the argument, advanced by the specified amount
- works on forward iterators or better (or bi-directional iterators if a negative distance is given))
https://stackoverflow.com/questions/15017065/whats-the-difference-between-stdadvance-and-stdnext
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