23 Iterators library [iterators]

23.5 Iterator adaptors [predef.iterators]

23.5.4 Common iterators [iterators.common]

23.5.4.5 Navigation [common.iter.nav]

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common_iterator& operator++();
1
#
Preconditions: holds_­alternative<I>(v_­).
2
#
Effects: Equivalent to ++get<I>(v_­).
3
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Returns: *this.
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decltype(auto) operator++(int);
4
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Preconditions: holds_­alternative<I>(v_­).
5
#
Effects: If I models forward_­iterator, equivalent to: 
common_iterator tmp = *this;
++*this;
return tmp;
Otherwise, equivalent to: return get<I>(v_­)++;