chunk_by_key_view¶
A view which chunks a range into subranges where the consecutive elements share the same key given by a projection function.
struct cat {
std::string name;
int age;
};
std::vector<cat> cats {
{"potato", 12},
{"bard", 12},
{"soft boy", 9},
{"vincent van catto", 12},
{"oatmeal", 12},
};
for (auto&& group : cats | tl::views::chunk_by_key([](auto&& c) { return c.age; })) {
//group 1 == { potato, bard }
//group 2 == { soft boy }
//group 3 == { vincent van catto, oatmeal }
}
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template <class V, class F> class tl::chunk_by_key_view Requires: forward_range<V> && view<V> && std::invocable<F, range_reference_t<V>>
Reference: std::pair<invoke_result_t<F, range_reference_t<V>>, subrange<iterator_t<V>>>
Category: Forward.
Sized: Never.
Common: Never.
Const-iterable: Never.
Borrowed: Never.
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chunk_by_key_view(V range, F func)¶
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