boost::openmethod::virtual_ptr<SmartPtr, Registry>::operator=

Assign from a (const) smart pointer to a derived class

Synopsis

Declared in <boost/openmethod/core.hpp>

template<class Other>
requires SameSmartPtr<SmartPtr, Other, Registry> &&
            std::is_assignable_v<SmartPtr, const Other&> &&
            BOOST_OPENMETHOD_DETAIL_UNLESS_MRDOCS
                IsPolymorphic<typename Other::element_type, Registry>
virtual_ptr&
operator=(Other const& other);

Description

Copy the object pointer from other to this. Set the v‐table pointer according to the dynamic type of *other.

Example

virtual_ptr<std::shared_ptr<Dog>> snoopy = make_shared_virtual<Dog>();
virtual_ptr<std::shared_ptr<Dog>> p;

p = snoopy;

BOOST_TEST(p.get() != nullptr);
BOOST_TEST(p.get() == snoopy.get());
BOOST_TEST(p.vptr() == default_registry::static_vptr<Dog>);
BOOST_TEST(snoopy.vptr() == default_registry::static_vptr<Dog>);

Requirements

  • SmartPtr and Other must be instantiated from the same template ‐ e.g. both std::shared_ptr or both std::unique_ptr.

  • Other must be a smart pointer to a polymorphic class derived from element_type.

  • SmartPtr must be constructible from const Other&.

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