std::remove_const_t >; 97polymorphic as polymorphic g++-10 Clang-12 MSVC v19.29 template concept polymorphic = std::is_polymorphic_v; template< polymorphic C, polymorphic X > auto as( X& x ) Derived 98polymorphic as polymorphic g++-10 Clang-12 MSVC v19.29 template concept polymorphic = std::is_polymorphic_v>; template< polymorphic C, polymorphic X > auto

represent multiple different types... – Polymorphic Variable ● ...or the provision of a single interface to entities of different types – Polymorphic Invokable ● Polymorphism is type based dispatch challenge is the variableCppcon 2023 | Rud Merriam | A Journey into Non-Virtual Polymorphism 5 Polymorphic Variables ● Base class pointer to derived class – Virtual functions are not bad! ● Standard std::variant – std::tupleCppcon 2023 | Rud Merriam | A Journey into Non-Virtual Polymorphism 6 Polymorphic Invokables ● Overloaded functions and operators int plus(int, int); string plus(string, string);

programming language includes dynamic storage allocation, full upward funargs, and universally polymorphic procedures. The Smalltalk-80 programming system features interactive execution with incremental programming language includes dynamic storage allocation, full upward funargs, and universally polymorphic procedures. The Smalltalk-80 programming system features interactive execution with incremental programming language includes dynamic storage allocation, full upward funargs, and universally polymorphic procedures. The Smalltalk-80 programming system features interactive execution with incremental

return ret; }50 interface An abstract class having only pure virtual functions polymorphic_base A pure polymorphic base type that is not copyable or movable, and whose destructor is either public+virtual std::variant)51 interface An abstract class having only pure virtual functions polymorphic_base A pure polymorphic base type that is not copyable or movable, and whose destructor is either public+virtual

Polymorphism - Sean Parent "The requirement of a polymorphic type, by definition, comes from its use. There are no polymorphic types, only polymorphic uses of similar types." 41RUNTIME POLYMORPHISM const& o) { 7 draw(o); 8 }); 9 } 10 11 12 13 14 15 16 17 56.1RUNTIME POLYMORPHISM Pre: Polymorphic use of stateful objects 1. Interchangeable objects: Owning base class pointer 2. Objects with

… // gpu // ??? // ??? // … 15 |• Added in C++17: • std::pmr::memory_resource • std::pmr::polymorphic_allocator • std::pmr::vector • std::pmr::monotonic_buffer_resource • … std::pmr 16 |// gpu … Device Only Memory Allocation 27 |template struct no_init_allocator : std::pmr::polymorphic_allocator { // constructors template void construct(U* p) { ::new ; A Non-Initialising Allocator 28 |template struct no_init_allocator : std::pmr::polymorphic_allocator { // constructors template void construct(U* p) { ::new

Semantics Move Semantics in Polymorphic Classes ”Declared virtual destructors disable move semantics -Moving special member functions are not generated -Ifand only ifa polymorphic base class has members expensive -Person() = defauli 1disables move semantics for members 有 class customer : public Person { lderived polymorphic class Protected std: :vector data imove semantics for data enabled without special

declared user declared Source: [2] Andreas Fertig v1.0 Back to Basics 14 The keywords for polymorphic classes ■ virtual: Marks a function as replaceable by a derived class. ■ override: A function member public. ■ Declare the destructor virtual in the base class, if the class should support polymorphic deletion. ■ Declare member functions that you override from a base class with override. ■ Never

hazard_pointer_domain { public: hazard_pointer_domain() noexcept; explicit hazard_pointer_domain( pmr::polymorphic_allocator poly_alloc) noexcept; hazard_pointer_domain(const hazard_pointer_domain&) = delete; hazard_pointer_domain { public: hazard_pointer_domain() noexcept; explicit hazard_pointer_domain( pmr::polymorphic_allocator poly_alloc) noexcept; hazard_pointer_domain(const hazard_pointer_domain&) = delete;

pring-update/27 interface An abstract class having only pure virtual functions polymorphic_base A pure polymorphic base type that is not copyable or movable, and whose destructor is either public+virtual