std::ranges::subrange<I,S,K>::prev
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(since C++20) |
Obtains a subrange whose iterator is decremented by n times or incremented by min(-n, size()) times respect to that of *this, when n >= 0 or n < 0 respectively.
Equivalent to auto tmp = *this; tmp.advance(-n); return tmp;. The behavior is undefined if the iterator is decremented after being a non-decrementable value.
Parameters
| n | - | number of minimal decrements of the iterator |
Return value
A subrange whose iterator is decremented by n times or incremented by min(-n, size()) times respect to that of *this, when n >= 0 or n < 0 respectively.
Complexity
Generally n decrements or min(-n, size()) increments on the iterator, when n >= 0 or n < 0 respectively.
Constant if I models random_access_iterator, and either n >= 0 or std::sized_sentinel_for<S, I> is modeled.
Example
See also
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(C++20)
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obtains a copy of the subrange with its iterator advanced by a given distance (public member function) |
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(C++20)
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advances the iterator by given distance (public member function) |
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(C++11)
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decrement an iterator (function template) |
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(C++20)
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decrement an iterator by a given distance or to a bound (niebloid) |
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