27 Iterators library [iterators]

27.5 Iterator adaptors [predef.iterators]

27.5.1 Reverse iterators [reverse.iterators]

27.5.1.3 reverse_­iterator operations [reverse.iter.ops]

27.5.1.3.1 reverse_­iterator constructor [reverse.iter.cons]

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constexpr reverse_iterator();
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Effects: Value-initializes current.
Iterator operations applied to the resulting iterator have defined behavior if and only if the corresponding operations are defined on a value-initialized iterator of type Iterator.
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constexpr explicit reverse_iterator(Iterator x);
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Effects: Initializes current with x.
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template <class U> constexpr reverse_iterator(const reverse_iterator<U>& u);
3
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Effects: Initializes current with u.current.