Can I have a std::optionalT if T is neither constructible nor copyable nor movable?

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Can I have a std::optionalT if T is neither constructible nor copyable nor movable?
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(stackoverflow.com/users/11102572/igor-g)Igor G
(stackoverflow.com/users/5740428/jan-schultke)Jan Schultke
(stackoverflow.com/users/5825294/enlico)Enlico
A special thanks goes out to the (stackoverflow.com/questions/79119005/can-i-have-a-stdoptionalt-if-t-is-neither-constructible-nor-copyable-nor-mov)Stackexchange community

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c++17 c++23 c++20 c++ stdoptional



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