std::__is_location_invariant< _Tp >

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                                                    libstdc++          std::__is_location_invariant<_Tp>(3cxx)

template<typename_Tp>
       struct std::__is_location_invariant< _Tp >"Trait identifying 'location-invariant' types, meaning that the
       address of the object (or any of its members) will not escape. Trivially copyable types are location-
       invariant and users can specialize this trait for other types.

       std::__is_location_invariant< _Tp >

       #include <functional>

       Inherits is_trivially_copyable::type.