operator==,!=,<,<=,>,>=(std::unique_ptr) – cppreference.com


`template<class T1, class D1, class T2, class D2> bool operator==(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);`	(1)	(seit C++11)

`template<class T1, class D1, class T2, class D2> bool operator!=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);`	(2)	(seit C++11)

`template<class T1, class D1, class T2, class D2> bool operator<(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);`	(3)	(seit C++11)

`template<class T1, class D1, class T2, class D2> bool operator<=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);`	(4)	(seit C++11)

`template<class T1, class D1, class T2, class D2> bool operator>(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);`	(5)	(seit C++11)

`template<class T1, class D1, class T2, class D2> bool operator>=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);`	(6)	(seit C++11)

`template <class T, class D> bool operator==(const unique_ptr<T, D>& x, nullptr_t) noexcept;`	(7)	(seit C++11)

`template <class T, class D> bool operator==(nullptr_t, const unique_ptr<T, D>& x) noexcept;`	(8)	(seit C++11)

`template <class T, class D> bool operator!=(const unique_ptr<T, D>& x, nullptr_t) noexcept;`	(9)	(seit C++11)

`template <class T, class D> bool operator!=(nullptr_t, const unique_ptr<T, D>& x) noexcept;`	(10)	(seit C++11)

`template <class T, class D> bool operator<(const unique_ptr<T, D>& x, nullptr_t);`	(11)	(seit C++11)

`template <class T, class D> bool operator<(nullptr_t, const unique_ptr<T, D>& y);`	(12)	(seit C++11)

`template <class T, class D> bool operator<=(const unique_ptr<T, D>& x, nullptr_t);`	(13)	(seit C++11)

`template <class T, class D> bool operator<=(nullptr_t, const unique_ptr<T, D>& y);`	(14)	(seit C++11)

`template <class T, class D> bool operator>(const unique_ptr<T, D>& x, nullptr_t);`	(15)	(seit C++11)

`template <class T, class D> bool operator>(nullptr_t, const unique_ptr<T, D>& y);`	(16)	(seit C++11)

`template <class T, class D> bool operator>=(const unique_ptr<T, D>& x, nullptr_t);`	(17)	(seit C++11)

`template <class T, class D> bool operator>=(nullptr_t, const unique_ptr<T, D>& y);`	(18)	(seit C++11)

Vergleicht die Pointer-Werte von zwei unique_ptrs oder eine unique_ptr und nullptr .

Original:

Compares the pointer values of two unique_ptrs, or a unique_ptr and nullptr.

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Parameter

x, y

unique_ptrs zu vergleichen

Original:

unique_ptrs to compare

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Rückgabewert

1) x.get() == y.get()

2) x.get() != y.get()

std::less<CT>()(x.get(), y.get()), wo CT ist std::common_type<unique_ptr<T1, D1>::pointer, unique_ptr<T2, D2>::pointer>::type

Original:

std::less<CT>()(x.get(), y.get()), where CT is std::common_type<unique_ptr<T1, D1>::pointer, unique_ptr<T2, D2>::pointer>::type

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4) !(y < x)

5) y < x

6) !(x < y)

7-8) !x

9-10) (bool)x

11) std::less<unique_ptr<T,D>::pointer>()(x.get(), nullptr)

12) std::less<unique_ptr<T,D>::pointer>()(nullptr, y.get())

13) nullptr < x

14) y < nullptr

15) !(nullptr < x)

16) !(y < nullptr)

17) !(x < nullptr)

18) !(nullptr < y)

Beispiel

#include <iostream>
#include <memory>

int main() 
{
    std::unique_ptr<int> p1(new int(42));
    std::unique_ptr<int> p2(new int(42));

    std::cout << "p1 == p1: " << (p1 == p1) << '\n';

    // p1 and p2 point to different memory locations, so p1 != p2
    std::cout << "p1 == p2: " << (p1 == p2) << '\n';
}

Output:

Siehe auch


	liefert einen Zeiger auf das verwaltete Objekt Original: returns a pointer to the managed object The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion) [edit]