SkAnySubclass< Base, Size > Class Template Reference

#include <SkAnySubclass.h>

Public Member Functions
	SkAnySubclass ()=default
	~SkAnySubclass ()
	SkAnySubclass (const SkAnySubclass &)=delete
SkAnySubclass &	operator= (const SkAnySubclass &)=delete
	SkAnySubclass (SkAnySubclass &&)=delete
SkAnySubclass &	operator= (SkAnySubclass &&)=delete
template<typename T , typename... Args>
void	emplace (Args &&... args)
void	reset ()
const Base *	get () const
Base *	get ()
Base *	operator-> ()
const Base *	operator-> () const

Detailed Description

template<typename Base, size_t Size>
class SkAnySubclass< Base, Size >

Stores any subclass T of Base, where sizeof(T) <= Size, without using the heap. Doesn't need advance knowledge of T, so it's particularly suited to platform or backend implementations of a generic interface, where the set of possible subclasses is finite and known, but can't be made available at compile-time.

Definition at line 25 of file SkAnySubclass.h.

Constructor & Destructor Documentation

SkAnySubclass() [1/3]

template<typename Base , size_t Size>

SkAnySubclass< Base, Size >::SkAnySubclass ( )

default

~SkAnySubclass()

template<typename Base , size_t Size>

SkAnySubclass< Base, Size >::~SkAnySubclass ( )

inline

Definition at line 28 of file SkAnySubclass.h.

                     {
        this->reset();
    }

SkAnySubclass() [2/3]

template<typename Base , size_t Size>

SkAnySubclass< Base, Size >::SkAnySubclass ( const SkAnySubclass< Base, Size > &  )

delete

SkAnySubclass() [3/3]

template<typename Base , size_t Size>

SkAnySubclass< Base, Size >::SkAnySubclass ( SkAnySubclass< Base, Size > &&  )

delete

Member Function Documentation

emplace()

template<typename Base , size_t Size>

template<typename T , typename... Args>

void SkAnySubclass< Base, Size >::emplace ( Args &&...  args )

inline

Definition at line 38 of file SkAnySubclass.h.

                                 {
        static_assert(std::is_base_of_v<Base, T>);
        static_assert(sizeof(T) <= Size);
        // We're going to clean up our stored object by calling ~Base:
        static_assert(std::has_virtual_destructor_v<Base> || std::is_trivially_destructible_v<T>);
        SkASSERT(!fValid);
        new (fData) T(std::forward<Args>(args)...);
        fValid = true;
    }

get() [1/2]

template<typename Base , size_t Size>

Base * SkAnySubclass< Base, Size >::get ( )

inline

Definition at line 60 of file SkAnySubclass.h.

                {
        SkASSERT(fValid);
        return std::launder(reinterpret_cast<Base*>(fData));
    }

get() [2/2]

template<typename Base , size_t Size>

const Base * SkAnySubclass< Base, Size >::get ( ) const

inline

Definition at line 55 of file SkAnySubclass.h.

                            {
        SkASSERT(fValid);
        return std::launder(reinterpret_cast<const Base*>(fData));
    }

operator->() [1/2]

template<typename Base , size_t Size>

Base * SkAnySubclass< Base, Size >::operator-> ( )

inline

Definition at line 65 of file SkAnySubclass.h.

{ return this->get(); }

operator->() [2/2]

template<typename Base , size_t Size>

const Base * SkAnySubclass< Base, Size >::operator-> ( ) const

inline

Definition at line 66 of file SkAnySubclass.h.

{ return this->get(); }

operator=() [1/2]

template<typename Base , size_t Size>

SkAnySubclass & SkAnySubclass< Base, Size >::operator= ( const SkAnySubclass< Base, Size > &  )

delete

operator=() [2/2]

template<typename Base , size_t Size>

SkAnySubclass & SkAnySubclass< Base, Size >::operator= ( SkAnySubclass< Base, Size > &&  )

delete

reset()

template<typename Base , size_t Size>

void SkAnySubclass< Base, Size >::reset ( )

inline

Definition at line 48 of file SkAnySubclass.h.

                 {
        if (fValid) {
            this->get()->~Base();
        }
        fValid = false;
    }

---

The documentation for this class was generated from the following file:

• third_party/skia/include/private/base/SkAnySubclass.h