Defined in header <locale>
explicit facet( std::size_t refs = 0 );
facet(const facet&) = delete;

1) creates a facet with starting reference count refs. If refs is non-zero, the facet will not be deleted when the last locale referencing it goes out of scope. A facet with static or dynamic storage duration should always be constructed with a non-zero refs.

2) copy constructor is deleted; std::locale::facet is not copyable.

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