Nicholas Guriev e64c97fc2c Mark not_null constructors as noexcept when underlying type can be moved with no exception (#1135) ...

This enables possible optimisations for trivial types. This also avoids a bug
in std::variant::emplace from GNU's libstdc++.

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106547

2023-10-18 15:15:26 -07:00

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