On 2020-05-14 02:15, Thiago Macieira wrote:
On quarta-feira, 13 de maio de 2020 01:41:26 PDT Иван Комиссаров wrote:
std::span<Product> Project::productsSpan() const & { return
d->products; }
std::span<Product> Project::productsSpan() const && = delete;
Now implement either or both of these functions if internally you have
a
QSet<Products>.
Now implement QHash<Qt::ItemRole, QByteArray> roleNames() when
internally you have a std::pmr::unordered_map<Qt::ItemRole,
std::pmr::string>, with all the data allocated from one
std::pmr::monotonic_buffer_resource.
This does both ways.
And: you can also have views over associated data structures, they just
can't have inline functions because they need to type-erase the
container. For an extreme example, consider QAssociativeIterable.
Thanks,
Marc
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