https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87431
--- Comment #8 from Antony Polukhin <antoshkka at gmail dot com> --- Here's an idea: Make valueless_by_exception() always false if all the alternatives are trivially copyable. Implement copying and constructions/emplace for such variants as a construction of a temporary + memcpy to destination. In theory the compiler should eliminate the unnecessary copy.
