Method B

tests/test_smart_ptr.cpp:230–230

struct SharedFromThisRef {
    struct B : std::enable_shared_from_this<B> {
        B() { print_created(this); }
        // NOLINTNEXTLINE(bugprone-copy-constructor-init, readability-redundant-member-init)
        B(const B &) : std::enable_shared_from_this<B>() { print_copy_created(this); }
        // NOLINTNEXTLINE(readability-redundant-member-init)