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]

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.

constexpr explicit reverse_iterator(Iterator x);

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Effects: Initializes current with x.

template <class U> constexpr reverse_iterator(const reverse_iterator<U>& u);

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Effects: Initializes current with u.current.