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ridiculous_fish | karma 6729 | avg karma 5.37 · 2021-08-30 20:51:59

You can use a custom deleter, e.g.

    struct deleter_t { void operator()(impl_t *); };
    using impl_unique_ptr_t = std::unique_ptr<impl_t, deleter_t>;

You can place the implementation of the deleter alongside the impl.

cma | karma 10501 | avg karma 1.7 · 2021-08-31 00:46:20

That breaks make_unique. Maybe unique_ptr inside an std::any? Error-prone casting, but managed lifetime. Though make_unique is maybe obsolete now that parameter evaluation order is better defined.